[30] | 1 | /* |
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| 2 | * Branched from Samba project Subversion repository, version #7470: |
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[84] | 3 | * http://viewcvs.samba.org/cgi-bin/viewcvs.cgi/trunk/source/registry/regfio.c?rev=7470&view=auto |
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[30] | 4 | * |
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[134] | 5 | * Windows NT (and later) registry parsing library |
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[30] | 6 | * |
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[132] | 7 | * Copyright (C) 2005-2009 Timothy D. Morgan |
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[30] | 8 | * Copyright (C) 2005 Gerald (Jerry) Carter |
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| 9 | * |
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| 10 | * This program is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License as published by |
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[111] | 12 | * the Free Software Foundation; version 3 of the License. |
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[30] | 13 | * |
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| 14 | * This program is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this program; if not, write to the Free Software |
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| 21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | * $Id: regfi.c 155 2009-06-03 23:45:58Z tim $ |
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| 24 | */ |
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| 25 | |
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[147] | 26 | #include "regfi.h" |
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[30] | 27 | |
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| 28 | |
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[32] | 29 | /* Registry types mapping */ |
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[78] | 30 | const unsigned int regfi_num_reg_types = 12; |
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| 31 | static const char* regfi_type_names[] = |
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[65] | 32 | {"NONE", "SZ", "EXPAND_SZ", "BINARY", "DWORD", "DWORD_BE", "LINK", |
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[72] | 33 | "MULTI_SZ", "RSRC_LIST", "RSRC_DESC", "RSRC_REQ_LIST", "QWORD"}; |
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[30] | 34 | |
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[32] | 35 | |
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[135] | 36 | |
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| 37 | /****************************************************************************** |
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| 38 | ******************************************************************************/ |
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[138] | 39 | void regfi_add_message(REGFI_FILE* file, uint16 msg_type, const char* fmt, ...) |
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[135] | 40 | { |
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[136] | 41 | /* XXX: This function is not particularly efficient, |
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[135] | 42 | * but then it is mostly used during errors. |
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| 43 | */ |
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[136] | 44 | uint32 buf_size, buf_used; |
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| 45 | char* new_msg; |
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| 46 | va_list args; |
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[135] | 47 | |
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[138] | 48 | if((file->msg_mask & msg_type) != 0) |
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| 49 | { |
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| 50 | if(file->last_message == NULL) |
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| 51 | buf_used = 0; |
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| 52 | else |
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| 53 | buf_used = strlen(file->last_message); |
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| 54 | |
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| 55 | buf_size = buf_used+strlen(fmt)+160; |
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| 56 | new_msg = realloc(file->last_message, buf_size); |
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| 57 | if(new_msg == NULL) |
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| 58 | /* XXX: should we report this? */ |
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| 59 | return; |
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[135] | 60 | |
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[138] | 61 | switch (msg_type) |
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| 62 | { |
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| 63 | case REGFI_MSG_INFO: |
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| 64 | strcpy(new_msg+buf_used, "INFO: "); |
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| 65 | buf_used += 6; |
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| 66 | break; |
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| 67 | case REGFI_MSG_WARN: |
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| 68 | strcpy(new_msg+buf_used, "WARN: "); |
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| 69 | buf_used += 6; |
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| 70 | break; |
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| 71 | case REGFI_MSG_ERROR: |
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| 72 | strcpy(new_msg+buf_used, "ERROR: "); |
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| 73 | buf_used += 7; |
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| 74 | break; |
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| 75 | } |
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[136] | 76 | |
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[138] | 77 | va_start(args, fmt); |
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| 78 | vsnprintf(new_msg+buf_used, buf_size-buf_used, fmt, args); |
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| 79 | va_end(args); |
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| 80 | strncat(new_msg, "\n", buf_size-1); |
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| 81 | |
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| 82 | file->last_message = new_msg; |
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| 83 | } |
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[135] | 84 | } |
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| 85 | |
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| 86 | |
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| 87 | /****************************************************************************** |
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| 88 | ******************************************************************************/ |
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[136] | 89 | char* regfi_get_messages(REGFI_FILE* file) |
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[135] | 90 | { |
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| 91 | char* ret_val = file->last_message; |
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| 92 | file->last_message = NULL; |
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| 93 | |
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| 94 | return ret_val; |
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| 95 | } |
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| 96 | |
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| 97 | |
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[138] | 98 | void regfi_set_message_mask(REGFI_FILE* file, uint16 mask) |
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| 99 | { |
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| 100 | file->msg_mask = mask; |
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| 101 | } |
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| 102 | |
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| 103 | |
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[32] | 104 | /* Returns NULL on error */ |
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[78] | 105 | const char* regfi_type_val2str(unsigned int val) |
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[32] | 106 | { |
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[61] | 107 | if(val == REG_KEY) |
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| 108 | return "KEY"; |
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| 109 | |
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[78] | 110 | if(val >= regfi_num_reg_types) |
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[61] | 111 | return NULL; |
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| 112 | |
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[78] | 113 | return regfi_type_names[val]; |
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[32] | 114 | } |
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| 115 | |
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| 116 | |
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[61] | 117 | /* Returns -1 on error */ |
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[78] | 118 | int regfi_type_str2val(const char* str) |
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[32] | 119 | { |
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| 120 | int i; |
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| 121 | |
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[61] | 122 | if(strcmp("KEY", str) == 0) |
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| 123 | return REG_KEY; |
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[32] | 124 | |
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[78] | 125 | for(i=0; i < regfi_num_reg_types; i++) |
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| 126 | if (strcmp(regfi_type_names[i], str) == 0) |
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[61] | 127 | return i; |
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| 128 | |
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| 129 | if(strcmp("DWORD_LE", str) == 0) |
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| 130 | return REG_DWORD_LE; |
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| 131 | |
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| 132 | return -1; |
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[32] | 133 | } |
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| 134 | |
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| 135 | |
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[135] | 136 | /* Security descriptor formatting functions */ |
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[53] | 137 | |
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[78] | 138 | const char* regfi_ace_type2str(uint8 type) |
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[53] | 139 | { |
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| 140 | static const char* map[7] |
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| 141 | = {"ALLOW", "DENY", "AUDIT", "ALARM", |
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| 142 | "ALLOW CPD", "OBJ ALLOW", "OBJ DENY"}; |
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| 143 | if(type < 7) |
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| 144 | return map[type]; |
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| 145 | else |
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| 146 | /* XXX: would be nice to return the unknown integer value. |
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| 147 | * However, as it is a const string, it can't be free()ed later on, |
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| 148 | * so that would need to change. |
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| 149 | */ |
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| 150 | return "UNKNOWN"; |
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| 151 | } |
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| 152 | |
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| 153 | |
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[76] | 154 | /* XXX: need a better reference on the meaning of each flag. */ |
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| 155 | /* For more info, see: |
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| 156 | * http://msdn2.microsoft.com/en-us/library/aa772242.aspx |
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| 157 | */ |
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[78] | 158 | char* regfi_ace_flags2str(uint8 flags) |
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[53] | 159 | { |
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[76] | 160 | static const char* flag_map[32] = |
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[87] | 161 | { "OI", /* Object Inherit */ |
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| 162 | "CI", /* Container Inherit */ |
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| 163 | "NP", /* Non-Propagate */ |
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| 164 | "IO", /* Inherit Only */ |
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| 165 | "IA", /* Inherited ACE */ |
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[76] | 166 | NULL, |
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| 167 | NULL, |
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| 168 | NULL, |
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| 169 | }; |
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[53] | 170 | |
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[76] | 171 | char* ret_val = malloc(35*sizeof(char)); |
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| 172 | char* fo = ret_val; |
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| 173 | uint32 i; |
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| 174 | uint8 f; |
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| 175 | |
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| 176 | if(ret_val == NULL) |
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[53] | 177 | return NULL; |
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| 178 | |
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[76] | 179 | fo[0] = '\0'; |
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[53] | 180 | if (!flags) |
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[76] | 181 | return ret_val; |
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[53] | 182 | |
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[76] | 183 | for(i=0; i < 8; i++) |
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| 184 | { |
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| 185 | f = (1<<i); |
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| 186 | if((flags & f) && (flag_map[i] != NULL)) |
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| 187 | { |
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| 188 | strcpy(fo, flag_map[i]); |
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| 189 | fo += strlen(flag_map[i]); |
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| 190 | *(fo++) = ' '; |
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| 191 | flags ^= f; |
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| 192 | } |
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[53] | 193 | } |
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[76] | 194 | |
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| 195 | /* Any remaining unknown flags are added at the end in hex. */ |
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| 196 | if(flags != 0) |
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| 197 | sprintf(fo, "0x%.2X ", flags); |
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| 198 | |
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| 199 | /* Chop off the last space if we've written anything to ret_val */ |
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| 200 | if(fo != ret_val) |
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| 201 | fo[-1] = '\0'; |
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| 202 | |
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| 203 | return ret_val; |
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[53] | 204 | } |
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| 205 | |
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| 206 | |
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[78] | 207 | char* regfi_ace_perms2str(uint32 perms) |
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[53] | 208 | { |
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[76] | 209 | uint32 i, p; |
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| 210 | /* This is more than is needed by a fair margin. */ |
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| 211 | char* ret_val = malloc(350*sizeof(char)); |
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| 212 | char* r = ret_val; |
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| 213 | |
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| 214 | /* Each represents one of 32 permissions bits. NULL is for undefined/reserved bits. |
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| 215 | * For more information, see: |
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| 216 | * http://msdn2.microsoft.com/en-gb/library/aa374892.aspx |
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| 217 | * http://msdn2.microsoft.com/en-gb/library/ms724878.aspx |
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| 218 | */ |
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| 219 | static const char* perm_map[32] = |
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| 220 | {/* object-specific permissions (registry keys, in this case) */ |
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| 221 | "QRY_VAL", /* KEY_QUERY_VALUE */ |
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| 222 | "SET_VAL", /* KEY_SET_VALUE */ |
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| 223 | "CREATE_KEY", /* KEY_CREATE_SUB_KEY */ |
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| 224 | "ENUM_KEYS", /* KEY_ENUMERATE_SUB_KEYS */ |
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| 225 | "NOTIFY", /* KEY_NOTIFY */ |
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| 226 | "CREATE_LNK", /* KEY_CREATE_LINK - Reserved for system use. */ |
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| 227 | NULL, |
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| 228 | NULL, |
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| 229 | "WOW64_64", /* KEY_WOW64_64KEY */ |
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| 230 | "WOW64_32", /* KEY_WOW64_32KEY */ |
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| 231 | NULL, |
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| 232 | NULL, |
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| 233 | NULL, |
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| 234 | NULL, |
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| 235 | NULL, |
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| 236 | NULL, |
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| 237 | /* standard access rights */ |
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| 238 | "DELETE", /* DELETE */ |
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| 239 | "R_CONT", /* READ_CONTROL */ |
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| 240 | "W_DAC", /* WRITE_DAC */ |
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| 241 | "W_OWNER", /* WRITE_OWNER */ |
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| 242 | "SYNC", /* SYNCHRONIZE - Shouldn't be set in registries */ |
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| 243 | NULL, |
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| 244 | NULL, |
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| 245 | NULL, |
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| 246 | /* other generic */ |
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| 247 | "SYS_SEC", /* ACCESS_SYSTEM_SECURITY */ |
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| 248 | "MAX_ALLWD", /* MAXIMUM_ALLOWED */ |
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| 249 | NULL, |
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| 250 | NULL, |
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| 251 | "GEN_A", /* GENERIC_ALL */ |
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| 252 | "GEN_X", /* GENERIC_EXECUTE */ |
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| 253 | "GEN_W", /* GENERIC_WRITE */ |
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| 254 | "GEN_R", /* GENERIC_READ */ |
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| 255 | }; |
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| 256 | |
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| 257 | |
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[53] | 258 | if(ret_val == NULL) |
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| 259 | return NULL; |
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| 260 | |
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[76] | 261 | r[0] = '\0'; |
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| 262 | for(i=0; i < 32; i++) |
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| 263 | { |
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| 264 | p = (1<<i); |
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| 265 | if((perms & p) && (perm_map[i] != NULL)) |
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| 266 | { |
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| 267 | strcpy(r, perm_map[i]); |
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| 268 | r += strlen(perm_map[i]); |
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| 269 | *(r++) = ' '; |
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| 270 | perms ^= p; |
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| 271 | } |
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| 272 | } |
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| 273 | |
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| 274 | /* Any remaining unknown permission bits are added at the end in hex. */ |
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| 275 | if(perms != 0) |
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| 276 | sprintf(r, "0x%.8X ", perms); |
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[53] | 277 | |
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[76] | 278 | /* Chop off the last space if we've written anything to ret_val */ |
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| 279 | if(r != ret_val) |
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| 280 | r[-1] = '\0'; |
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| 281 | |
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[53] | 282 | return ret_val; |
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| 283 | } |
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| 284 | |
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| 285 | |
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[134] | 286 | char* regfi_sid2str(WINSEC_DOM_SID* sid) |
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[53] | 287 | { |
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[134] | 288 | uint32 i, size = WINSEC_MAX_SUBAUTHS*11 + 24; |
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[53] | 289 | uint32 left = size; |
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| 290 | uint8 comps = sid->num_auths; |
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| 291 | char* ret_val = malloc(size); |
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| 292 | |
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| 293 | if(ret_val == NULL) |
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| 294 | return NULL; |
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| 295 | |
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[134] | 296 | if(comps > WINSEC_MAX_SUBAUTHS) |
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| 297 | comps = WINSEC_MAX_SUBAUTHS; |
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[53] | 298 | |
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| 299 | left -= sprintf(ret_val, "S-%u-%u", sid->sid_rev_num, sid->id_auth[5]); |
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| 300 | |
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| 301 | for (i = 0; i < comps; i++) |
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| 302 | left -= snprintf(ret_val+(size-left), left, "-%u", sid->sub_auths[i]); |
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| 303 | |
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| 304 | return ret_val; |
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| 305 | } |
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| 306 | |
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| 307 | |
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[134] | 308 | char* regfi_get_acl(WINSEC_ACL* acl) |
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[53] | 309 | { |
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| 310 | uint32 i, extra, size = 0; |
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| 311 | const char* type_str; |
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| 312 | char* flags_str; |
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| 313 | char* perms_str; |
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| 314 | char* sid_str; |
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[61] | 315 | char* ace_delim = ""; |
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[53] | 316 | char* ret_val = NULL; |
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[61] | 317 | char* tmp_val = NULL; |
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| 318 | bool failed = false; |
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[53] | 319 | char field_delim = ':'; |
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| 320 | |
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[61] | 321 | for (i = 0; i < acl->num_aces && !failed; i++) |
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[53] | 322 | { |
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[134] | 323 | sid_str = regfi_sid2str(acl->aces[i]->trustee); |
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| 324 | type_str = regfi_ace_type2str(acl->aces[i]->type); |
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| 325 | perms_str = regfi_ace_perms2str(acl->aces[i]->access_mask); |
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| 326 | flags_str = regfi_ace_flags2str(acl->aces[i]->flags); |
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[53] | 327 | |
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[61] | 328 | if(flags_str != NULL && perms_str != NULL |
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| 329 | && type_str != NULL && sid_str != NULL) |
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| 330 | { |
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| 331 | /* XXX: this is slow */ |
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| 332 | extra = strlen(sid_str) + strlen(type_str) |
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[136] | 333 | + strlen(perms_str) + strlen(flags_str) + 5; |
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[61] | 334 | tmp_val = realloc(ret_val, size+extra); |
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[53] | 335 | |
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[61] | 336 | if(tmp_val == NULL) |
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| 337 | { |
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| 338 | free(ret_val); |
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[136] | 339 | ret_val = NULL; |
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[61] | 340 | failed = true; |
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| 341 | } |
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| 342 | else |
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| 343 | { |
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| 344 | ret_val = tmp_val; |
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[148] | 345 | size += sprintf(ret_val+size, "%s%s%c%s%c%s%c%s", |
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| 346 | ace_delim,sid_str, |
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| 347 | field_delim,type_str, |
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| 348 | field_delim,perms_str, |
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| 349 | field_delim,flags_str); |
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[61] | 350 | ace_delim = "|"; |
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| 351 | } |
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| 352 | } |
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| 353 | else |
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| 354 | failed = true; |
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| 355 | |
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| 356 | if(sid_str != NULL) |
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| 357 | free(sid_str); |
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| 358 | if(sid_str != NULL) |
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| 359 | free(perms_str); |
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| 360 | if(sid_str != NULL) |
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| 361 | free(flags_str); |
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[53] | 362 | } |
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| 363 | |
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| 364 | return ret_val; |
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| 365 | } |
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| 366 | |
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| 367 | |
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[134] | 368 | char* regfi_get_sacl(WINSEC_DESC *sec_desc) |
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[53] | 369 | { |
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| 370 | if (sec_desc->sacl) |
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[78] | 371 | return regfi_get_acl(sec_desc->sacl); |
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[53] | 372 | else |
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| 373 | return NULL; |
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| 374 | } |
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| 375 | |
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| 376 | |
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[134] | 377 | char* regfi_get_dacl(WINSEC_DESC *sec_desc) |
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[53] | 378 | { |
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| 379 | if (sec_desc->dacl) |
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[78] | 380 | return regfi_get_acl(sec_desc->dacl); |
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[53] | 381 | else |
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| 382 | return NULL; |
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| 383 | } |
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| 384 | |
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| 385 | |
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[134] | 386 | char* regfi_get_owner(WINSEC_DESC *sec_desc) |
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[53] | 387 | { |
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[78] | 388 | return regfi_sid2str(sec_desc->owner_sid); |
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[53] | 389 | } |
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| 390 | |
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| 391 | |
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[134] | 392 | char* regfi_get_group(WINSEC_DESC *sec_desc) |
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[53] | 393 | { |
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[78] | 394 | return regfi_sid2str(sec_desc->grp_sid); |
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[53] | 395 | } |
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| 396 | |
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| 397 | |
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[101] | 398 | /***************************************************************************** |
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| 399 | * This function is just like read(2), except that it continues to |
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| 400 | * re-try reading from the file descriptor if EINTR or EAGAIN is received. |
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| 401 | * regfi_read will attempt to read length bytes from fd and write them to buf. |
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| 402 | * |
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| 403 | * On success, 0 is returned. Upon failure, an errno code is returned. |
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| 404 | * |
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| 405 | * The number of bytes successfully read is returned through the length |
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| 406 | * parameter by reference. If both the return value and length parameter are |
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| 407 | * returned as 0, then EOF was encountered immediately |
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| 408 | *****************************************************************************/ |
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| 409 | uint32 regfi_read(int fd, uint8* buf, uint32* length) |
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| 410 | { |
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| 411 | uint32 rsize = 0; |
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| 412 | uint32 rret = 0; |
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| 413 | |
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| 414 | do |
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| 415 | { |
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| 416 | rret = read(fd, buf + rsize, *length - rsize); |
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| 417 | if(rret > 0) |
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| 418 | rsize += rret; |
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| 419 | }while(*length - rsize > 0 |
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| 420 | && (rret > 0 || (rret == -1 && (errno == EAGAIN || errno == EINTR)))); |
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| 421 | |
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| 422 | *length = rsize; |
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| 423 | if (rret == -1 && errno != EINTR && errno != EAGAIN) |
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| 424 | return errno; |
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| 425 | |
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| 426 | return 0; |
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| 427 | } |
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| 428 | |
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| 429 | |
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| 430 | /***************************************************************************** |
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| 431 | * |
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| 432 | *****************************************************************************/ |
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[111] | 433 | bool regfi_parse_cell(int fd, uint32 offset, uint8* hdr, uint32 hdr_len, |
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| 434 | uint32* cell_length, bool* unalloc) |
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[101] | 435 | { |
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| 436 | uint32 length; |
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| 437 | int32 raw_length; |
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| 438 | uint8 tmp[4]; |
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| 439 | |
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| 440 | if(lseek(fd, offset, SEEK_SET) == -1) |
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| 441 | return false; |
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| 442 | |
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| 443 | length = 4; |
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| 444 | if((regfi_read(fd, tmp, &length) != 0) || length != 4) |
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| 445 | return false; |
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| 446 | raw_length = IVALS(tmp, 0); |
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| 447 | |
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| 448 | if(raw_length < 0) |
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| 449 | { |
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| 450 | (*cell_length) = raw_length*(-1); |
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| 451 | (*unalloc) = false; |
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| 452 | } |
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| 453 | else |
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| 454 | { |
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| 455 | (*cell_length) = raw_length; |
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| 456 | (*unalloc) = true; |
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| 457 | } |
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| 458 | |
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[103] | 459 | if(*cell_length - 4 < hdr_len) |
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| 460 | return false; |
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| 461 | |
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| 462 | if(hdr_len > 0) |
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| 463 | { |
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| 464 | length = hdr_len; |
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| 465 | if((regfi_read(fd, hdr, &length) != 0) || length != hdr_len) |
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| 466 | return false; |
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| 467 | } |
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| 468 | |
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[101] | 469 | return true; |
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| 470 | } |
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| 471 | |
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| 472 | |
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[30] | 473 | /******************************************************************* |
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[106] | 474 | * Given an offset and an hbin, is the offset within that hbin? |
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| 475 | * The offset is a virtual file offset. |
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| 476 | *******************************************************************/ |
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[146] | 477 | static bool regfi_offset_in_hbin(const REGFI_HBIN* hbin, uint32 voffset) |
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[30] | 478 | { |
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[106] | 479 | if(!hbin) |
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[31] | 480 | return false; |
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[106] | 481 | |
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[145] | 482 | if((voffset > hbin->first_hbin_off) |
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| 483 | && (voffset < (hbin->first_hbin_off + hbin->block_size))) |
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[31] | 484 | return true; |
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[30] | 485 | |
---|
[31] | 486 | return false; |
---|
[30] | 487 | } |
---|
| 488 | |
---|
| 489 | |
---|
[106] | 490 | |
---|
[30] | 491 | /******************************************************************* |
---|
[135] | 492 | * Provide a virtual offset and receive the correpsonding HBIN |
---|
[106] | 493 | * block for it. NULL if one doesn't exist. |
---|
| 494 | *******************************************************************/ |
---|
[146] | 495 | const REGFI_HBIN* regfi_lookup_hbin(REGFI_FILE* file, uint32 voffset) |
---|
[30] | 496 | { |
---|
[146] | 497 | return (const REGFI_HBIN*)range_list_find_data(file->hbins, |
---|
| 498 | voffset+REGFI_REGF_SIZE); |
---|
[30] | 499 | } |
---|
| 500 | |
---|
| 501 | |
---|
[139] | 502 | |
---|
| 503 | /****************************************************************************** |
---|
| 504 | ******************************************************************************/ |
---|
| 505 | REGFI_SUBKEY_LIST* regfi_load_subkeylist(REGFI_FILE* file, uint32 offset, |
---|
| 506 | uint32 num_keys, uint32 max_size, |
---|
| 507 | bool strict) |
---|
[127] | 508 | { |
---|
[135] | 509 | REGFI_SUBKEY_LIST* ret_val; |
---|
[134] | 510 | |
---|
[139] | 511 | ret_val = regfi_load_subkeylist_aux(file, offset, max_size, strict, |
---|
| 512 | REGFI_MAX_SUBKEY_DEPTH); |
---|
[143] | 513 | if(ret_val == NULL) |
---|
| 514 | { |
---|
| 515 | regfi_add_message(file, REGFI_MSG_WARN, "Failed to load subkey list at" |
---|
| 516 | " offset 0x%.8X.", offset); |
---|
| 517 | return NULL; |
---|
| 518 | } |
---|
[139] | 519 | |
---|
| 520 | if(num_keys != ret_val->num_keys) |
---|
| 521 | { |
---|
| 522 | /* Not sure which should be authoritative, the number from the |
---|
| 523 | * NK record, or the number in the subkey list. Just emit a warning for |
---|
| 524 | * now if they don't match. |
---|
| 525 | */ |
---|
| 526 | regfi_add_message(file, REGFI_MSG_WARN, "Number of subkeys listed in parent" |
---|
| 527 | " (%d) did not match number found in subkey list/tree (%d)" |
---|
| 528 | " while parsing subkey list/tree at offset 0x%.8X.", |
---|
| 529 | num_keys, ret_val->num_keys, offset); |
---|
| 530 | } |
---|
| 531 | |
---|
| 532 | return ret_val; |
---|
| 533 | } |
---|
| 534 | |
---|
| 535 | |
---|
| 536 | /****************************************************************************** |
---|
| 537 | ******************************************************************************/ |
---|
| 538 | REGFI_SUBKEY_LIST* regfi_load_subkeylist_aux(REGFI_FILE* file, uint32 offset, |
---|
| 539 | uint32 max_size, bool strict, |
---|
| 540 | uint8 depth_left) |
---|
| 541 | { |
---|
| 542 | REGFI_SUBKEY_LIST* ret_val; |
---|
| 543 | REGFI_SUBKEY_LIST** sublists; |
---|
[146] | 544 | const REGFI_HBIN* sublist_hbin; |
---|
[139] | 545 | uint32 i, num_sublists, off, max_length; |
---|
| 546 | |
---|
| 547 | if(depth_left == 0) |
---|
| 548 | { |
---|
| 549 | regfi_add_message(file, REGFI_MSG_WARN, "Maximum depth reached" |
---|
| 550 | " while parsing subkey list/tree at offset 0x%.8X.", |
---|
| 551 | offset); |
---|
[127] | 552 | return NULL; |
---|
[139] | 553 | } |
---|
[134] | 554 | |
---|
[139] | 555 | ret_val = regfi_parse_subkeylist(file, offset, max_size, strict); |
---|
[134] | 556 | if(ret_val == NULL) |
---|
| 557 | return NULL; |
---|
[139] | 558 | |
---|
| 559 | if(ret_val->recursive_type) |
---|
[127] | 560 | { |
---|
[139] | 561 | num_sublists = ret_val->num_children; |
---|
[150] | 562 | sublists = (REGFI_SUBKEY_LIST**)malloc(num_sublists |
---|
[139] | 563 | * sizeof(REGFI_SUBKEY_LIST*)); |
---|
| 564 | for(i=0; i < num_sublists; i++) |
---|
[127] | 565 | { |
---|
[139] | 566 | off = ret_val->elements[i].offset + REGFI_REGF_SIZE; |
---|
| 567 | sublist_hbin = regfi_lookup_hbin(file, ret_val->elements[i].offset); |
---|
| 568 | if(sublist_hbin == NULL) |
---|
| 569 | sublists[i] = NULL; |
---|
| 570 | else |
---|
| 571 | { |
---|
| 572 | max_length = sublist_hbin->block_size + sublist_hbin->file_off - off; |
---|
| 573 | sublists[i] = regfi_load_subkeylist_aux(file, off, max_length, strict, |
---|
| 574 | depth_left-1); |
---|
| 575 | } |
---|
[127] | 576 | } |
---|
[150] | 577 | talloc_free(ret_val); |
---|
[134] | 578 | |
---|
[139] | 579 | return regfi_merge_subkeylists(num_sublists, sublists, strict); |
---|
[127] | 580 | } |
---|
[30] | 581 | |
---|
[127] | 582 | return ret_val; |
---|
| 583 | } |
---|
| 584 | |
---|
| 585 | |
---|
[139] | 586 | /****************************************************************************** |
---|
| 587 | ******************************************************************************/ |
---|
| 588 | REGFI_SUBKEY_LIST* regfi_parse_subkeylist(REGFI_FILE* file, uint32 offset, |
---|
| 589 | uint32 max_size, bool strict) |
---|
[30] | 590 | { |
---|
[135] | 591 | REGFI_SUBKEY_LIST* ret_val; |
---|
[150] | 592 | uint32 i, cell_length, length, elem_size, read_len; |
---|
| 593 | uint8* elements = NULL; |
---|
[127] | 594 | uint8 buf[REGFI_SUBKEY_LIST_MIN_LEN]; |
---|
[104] | 595 | bool unalloc; |
---|
[139] | 596 | bool recursive_type; |
---|
[30] | 597 | |
---|
[127] | 598 | if(!regfi_parse_cell(file->fd, offset, buf, REGFI_SUBKEY_LIST_MIN_LEN, |
---|
[104] | 599 | &cell_length, &unalloc)) |
---|
[139] | 600 | { |
---|
| 601 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse cell while " |
---|
| 602 | "parsing subkey-list at offset 0x%.8X.", offset); |
---|
[104] | 603 | return NULL; |
---|
[139] | 604 | } |
---|
[30] | 605 | |
---|
[116] | 606 | if(cell_length > max_size) |
---|
| 607 | { |
---|
[139] | 608 | regfi_add_message(file, REGFI_MSG_WARN, "Cell size longer than max_size" |
---|
| 609 | " while parsing subkey-list at offset 0x%.8X.", offset); |
---|
[116] | 610 | if(strict) |
---|
| 611 | return NULL; |
---|
| 612 | cell_length = max_size & 0xFFFFFFF8; |
---|
| 613 | } |
---|
[30] | 614 | |
---|
[139] | 615 | recursive_type = false; |
---|
[127] | 616 | if(buf[0] == 'r' && buf[1] == 'i') |
---|
[104] | 617 | { |
---|
[139] | 618 | recursive_type = true; |
---|
| 619 | elem_size = sizeof(uint32); |
---|
[104] | 620 | } |
---|
[139] | 621 | else if(buf[0] == 'l' && buf[1] == 'i') |
---|
[134] | 622 | elem_size = sizeof(uint32); |
---|
| 623 | else if((buf[0] == 'l') && (buf[1] == 'f' || buf[1] == 'h')) |
---|
[135] | 624 | elem_size = sizeof(REGFI_SUBKEY_LIST_ELEM); |
---|
[134] | 625 | else |
---|
| 626 | { |
---|
[139] | 627 | regfi_add_message(file, REGFI_MSG_ERROR, "Unknown magic number" |
---|
| 628 | " (0x%.2X, 0x%.2X) encountered while parsing" |
---|
| 629 | " subkey-list at offset 0x%.8X.", buf[0], buf[1], offset); |
---|
[134] | 630 | return NULL; |
---|
| 631 | } |
---|
| 632 | |
---|
[150] | 633 | ret_val = talloc(NULL, REGFI_SUBKEY_LIST); |
---|
[127] | 634 | if(ret_val == NULL) |
---|
| 635 | return NULL; |
---|
| 636 | |
---|
| 637 | ret_val->offset = offset; |
---|
| 638 | ret_val->cell_size = cell_length; |
---|
[104] | 639 | ret_val->magic[0] = buf[0]; |
---|
| 640 | ret_val->magic[1] = buf[1]; |
---|
[139] | 641 | ret_val->recursive_type = recursive_type; |
---|
| 642 | ret_val->num_children = SVAL(buf, 0x2); |
---|
[101] | 643 | |
---|
[139] | 644 | if(!recursive_type) |
---|
| 645 | ret_val->num_keys = ret_val->num_children; |
---|
[101] | 646 | |
---|
[139] | 647 | length = elem_size*ret_val->num_children; |
---|
| 648 | if(cell_length - REGFI_SUBKEY_LIST_MIN_LEN - sizeof(uint32) < length) |
---|
[134] | 649 | { |
---|
[139] | 650 | regfi_add_message(file, REGFI_MSG_WARN, "Number of elements too large for" |
---|
| 651 | " cell while parsing subkey-list at offset 0x%.8X.", |
---|
| 652 | offset); |
---|
| 653 | if(strict) |
---|
[150] | 654 | goto fail; |
---|
[139] | 655 | length = cell_length - REGFI_SUBKEY_LIST_MIN_LEN - sizeof(uint32); |
---|
[134] | 656 | } |
---|
[30] | 657 | |
---|
[150] | 658 | ret_val->elements = talloc_array(ret_val, REGFI_SUBKEY_LIST_ELEM, |
---|
| 659 | ret_val->num_children); |
---|
[127] | 660 | if(ret_val->elements == NULL) |
---|
[150] | 661 | goto fail; |
---|
[30] | 662 | |
---|
[150] | 663 | elements = (uint8*)malloc(length); |
---|
[139] | 664 | if(elements == NULL) |
---|
[150] | 665 | goto fail; |
---|
[30] | 666 | |
---|
[150] | 667 | read_len = length; |
---|
| 668 | if(regfi_read(file->fd, elements, &read_len) != 0 || read_len != length) |
---|
| 669 | goto fail; |
---|
[30] | 670 | |
---|
[139] | 671 | if(elem_size == sizeof(uint32)) |
---|
[104] | 672 | { |
---|
[139] | 673 | for (i=0; i < ret_val->num_children; i++) |
---|
[134] | 674 | { |
---|
[139] | 675 | ret_val->elements[i].offset = IVAL(elements, i*elem_size); |
---|
[134] | 676 | ret_val->elements[i].hash = 0; |
---|
| 677 | } |
---|
[104] | 678 | } |
---|
[134] | 679 | else |
---|
| 680 | { |
---|
[139] | 681 | for (i=0; i < ret_val->num_children; i++) |
---|
[134] | 682 | { |
---|
[139] | 683 | ret_val->elements[i].offset = IVAL(elements, i*elem_size); |
---|
| 684 | ret_val->elements[i].hash = IVAL(elements, i*elem_size+4); |
---|
[134] | 685 | } |
---|
| 686 | } |
---|
[139] | 687 | free(elements); |
---|
[30] | 688 | |
---|
[104] | 689 | return ret_val; |
---|
[150] | 690 | |
---|
| 691 | fail: |
---|
| 692 | if(elements != NULL) |
---|
| 693 | free(elements); |
---|
| 694 | talloc_free(ret_val); |
---|
| 695 | return NULL; |
---|
[30] | 696 | } |
---|
| 697 | |
---|
| 698 | |
---|
[139] | 699 | /******************************************************************* |
---|
| 700 | *******************************************************************/ |
---|
| 701 | REGFI_SUBKEY_LIST* regfi_merge_subkeylists(uint16 num_lists, |
---|
| 702 | REGFI_SUBKEY_LIST** lists, |
---|
| 703 | bool strict) |
---|
| 704 | { |
---|
| 705 | uint32 i,j,k; |
---|
| 706 | REGFI_SUBKEY_LIST* ret_val; |
---|
[102] | 707 | |
---|
[139] | 708 | if(lists == NULL) |
---|
| 709 | return NULL; |
---|
[150] | 710 | ret_val = talloc(NULL, REGFI_SUBKEY_LIST); |
---|
[139] | 711 | |
---|
| 712 | if(ret_val == NULL) |
---|
| 713 | return NULL; |
---|
| 714 | |
---|
| 715 | /* Obtain total number of elements */ |
---|
| 716 | ret_val->num_keys = 0; |
---|
| 717 | for(i=0; i < num_lists; i++) |
---|
| 718 | { |
---|
| 719 | if(lists[i] != NULL) |
---|
| 720 | ret_val->num_keys += lists[i]->num_children; |
---|
| 721 | } |
---|
| 722 | ret_val->num_children = ret_val->num_keys; |
---|
| 723 | |
---|
| 724 | if(ret_val->num_keys > 0) |
---|
| 725 | { |
---|
[150] | 726 | ret_val->elements = talloc_array(ret_val, REGFI_SUBKEY_LIST_ELEM, |
---|
| 727 | ret_val->num_keys); |
---|
[139] | 728 | k=0; |
---|
| 729 | |
---|
| 730 | if(ret_val->elements != NULL) |
---|
| 731 | { |
---|
| 732 | for(i=0; i < num_lists; i++) |
---|
| 733 | { |
---|
| 734 | if(lists[i] != NULL) |
---|
| 735 | { |
---|
| 736 | for(j=0; j < lists[i]->num_keys; j++) |
---|
| 737 | { |
---|
[150] | 738 | ret_val->elements[k].hash = lists[i]->elements[j].hash; |
---|
| 739 | ret_val->elements[k++].offset = lists[i]->elements[j].offset; |
---|
[139] | 740 | } |
---|
| 741 | } |
---|
| 742 | } |
---|
| 743 | } |
---|
| 744 | } |
---|
| 745 | |
---|
| 746 | for(i=0; i < num_lists; i++) |
---|
| 747 | regfi_subkeylist_free(lists[i]); |
---|
| 748 | free(lists); |
---|
| 749 | |
---|
| 750 | return ret_val; |
---|
| 751 | } |
---|
| 752 | |
---|
| 753 | |
---|
[147] | 754 | /****************************************************************************** |
---|
| 755 | * |
---|
| 756 | ******************************************************************************/ |
---|
| 757 | REGFI_SK_REC* regfi_parse_sk(REGFI_FILE* file, uint32 offset, uint32 max_size, |
---|
| 758 | bool strict) |
---|
[30] | 759 | { |
---|
[135] | 760 | REGFI_SK_REC* ret_val; |
---|
[147] | 761 | uint8* sec_desc_buf = NULL; |
---|
[102] | 762 | uint32 cell_length, length; |
---|
| 763 | uint8 sk_header[REGFI_SK_MIN_LENGTH]; |
---|
| 764 | bool unalloc = false; |
---|
[30] | 765 | |
---|
[102] | 766 | if(!regfi_parse_cell(file->fd, offset, sk_header, REGFI_SK_MIN_LENGTH, |
---|
| 767 | &cell_length, &unalloc)) |
---|
[137] | 768 | { |
---|
[138] | 769 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse SK record cell" |
---|
[137] | 770 | " at offset 0x%.8X.", offset); |
---|
[102] | 771 | return NULL; |
---|
[137] | 772 | } |
---|
[102] | 773 | |
---|
| 774 | if(sk_header[0] != 's' || sk_header[1] != 'k') |
---|
[137] | 775 | { |
---|
[138] | 776 | regfi_add_message(file, REGFI_MSG_WARN, "Magic number mismatch in parsing" |
---|
| 777 | " SK record at offset 0x%.8X.", offset); |
---|
[102] | 778 | return NULL; |
---|
[137] | 779 | } |
---|
| 780 | |
---|
[147] | 781 | ret_val = talloc(NULL, REGFI_SK_REC); |
---|
[102] | 782 | if(ret_val == NULL) |
---|
| 783 | return NULL; |
---|
[30] | 784 | |
---|
[102] | 785 | ret_val->offset = offset; |
---|
[116] | 786 | /* XXX: Is there a way to be more conservative (shorter) with |
---|
| 787 | * cell length when cell is unallocated? |
---|
[111] | 788 | */ |
---|
[102] | 789 | ret_val->cell_size = cell_length; |
---|
[30] | 790 | |
---|
[102] | 791 | if(ret_val->cell_size > max_size) |
---|
| 792 | ret_val->cell_size = max_size & 0xFFFFFFF8; |
---|
| 793 | if((ret_val->cell_size < REGFI_SK_MIN_LENGTH) |
---|
| 794 | || (strict && ret_val->cell_size != (ret_val->cell_size & 0xFFFFFFF8))) |
---|
| 795 | { |
---|
[138] | 796 | regfi_add_message(file, REGFI_MSG_WARN, "Invalid cell size found while" |
---|
| 797 | " parsing SK record at offset 0x%.8X.", offset); |
---|
[147] | 798 | goto fail; |
---|
[102] | 799 | } |
---|
[30] | 800 | |
---|
[102] | 801 | ret_val->magic[0] = sk_header[0]; |
---|
| 802 | ret_val->magic[1] = sk_header[1]; |
---|
[30] | 803 | |
---|
[102] | 804 | ret_val->unknown_tag = SVAL(sk_header, 0x2); |
---|
| 805 | ret_val->prev_sk_off = IVAL(sk_header, 0x4); |
---|
| 806 | ret_val->next_sk_off = IVAL(sk_header, 0x8); |
---|
| 807 | ret_val->ref_count = IVAL(sk_header, 0xC); |
---|
| 808 | ret_val->desc_size = IVAL(sk_header, 0x10); |
---|
[30] | 809 | |
---|
[140] | 810 | if(ret_val->prev_sk_off != (ret_val->prev_sk_off & 0xFFFFFFF8) |
---|
| 811 | || ret_val->next_sk_off != (ret_val->next_sk_off & 0xFFFFFFF8)) |
---|
| 812 | { |
---|
| 813 | regfi_add_message(file, REGFI_MSG_WARN, "SK record's next/previous offsets" |
---|
| 814 | " are not a multiple of 8 while parsing SK record at" |
---|
| 815 | " offset 0x%.8X.", offset); |
---|
[147] | 816 | goto fail; |
---|
[140] | 817 | } |
---|
| 818 | |
---|
[102] | 819 | if(ret_val->desc_size + REGFI_SK_MIN_LENGTH > ret_val->cell_size) |
---|
| 820 | { |
---|
[140] | 821 | regfi_add_message(file, REGFI_MSG_WARN, "Security descriptor too large for" |
---|
[138] | 822 | " cell while parsing SK record at offset 0x%.8X.", |
---|
| 823 | offset); |
---|
[147] | 824 | goto fail; |
---|
[102] | 825 | } |
---|
[30] | 826 | |
---|
[147] | 827 | sec_desc_buf = (uint8*)malloc(ret_val->desc_size); |
---|
| 828 | if(sec_desc_buf == NULL) |
---|
| 829 | goto fail; |
---|
[102] | 830 | |
---|
[134] | 831 | length = ret_val->desc_size; |
---|
| 832 | if(regfi_read(file->fd, sec_desc_buf, &length) != 0 |
---|
| 833 | || length != ret_val->desc_size) |
---|
| 834 | { |
---|
[138] | 835 | regfi_add_message(file, REGFI_MSG_ERROR, "Failed to read security" |
---|
| 836 | " descriptor while parsing SK record at offset 0x%.8X.", |
---|
| 837 | offset); |
---|
[147] | 838 | goto fail; |
---|
[134] | 839 | } |
---|
[102] | 840 | |
---|
[147] | 841 | if(!(ret_val->sec_desc = winsec_parse_desc(ret_val, sec_desc_buf, |
---|
| 842 | ret_val->desc_size))) |
---|
[134] | 843 | { |
---|
[138] | 844 | regfi_add_message(file, REGFI_MSG_ERROR, "Failed to parse security" |
---|
| 845 | " descriptor while parsing SK record at offset 0x%.8X.", |
---|
| 846 | offset); |
---|
[147] | 847 | goto fail; |
---|
[134] | 848 | } |
---|
[147] | 849 | |
---|
[134] | 850 | free(sec_desc_buf); |
---|
[147] | 851 | return ret_val; |
---|
[134] | 852 | |
---|
[147] | 853 | fail: |
---|
| 854 | if(sec_desc_buf != NULL) |
---|
| 855 | free(sec_desc_buf); |
---|
| 856 | talloc_free(ret_val); |
---|
| 857 | return NULL; |
---|
[30] | 858 | } |
---|
| 859 | |
---|
| 860 | |
---|
[145] | 861 | REGFI_VALUE_LIST* regfi_parse_valuelist(REGFI_FILE* file, uint32 offset, |
---|
| 862 | uint32 num_values, bool strict) |
---|
[111] | 863 | { |
---|
[145] | 864 | REGFI_VALUE_LIST* ret_val; |
---|
[111] | 865 | uint32 i, cell_length, length, read_len; |
---|
| 866 | bool unalloc; |
---|
[30] | 867 | |
---|
[111] | 868 | if(!regfi_parse_cell(file->fd, offset, NULL, 0, &cell_length, &unalloc)) |
---|
[137] | 869 | { |
---|
[138] | 870 | regfi_add_message(file, REGFI_MSG_ERROR, "Failed to read cell header" |
---|
[137] | 871 | " while parsing value list at offset 0x%.8X.", offset); |
---|
[111] | 872 | return NULL; |
---|
[137] | 873 | } |
---|
[111] | 874 | |
---|
| 875 | if(cell_length != (cell_length & 0xFFFFFFF8)) |
---|
| 876 | { |
---|
[145] | 877 | regfi_add_message(file, REGFI_MSG_WARN, "Cell length not a multiple of 8" |
---|
| 878 | " while parsing value list at offset 0x%.8X.", offset); |
---|
[111] | 879 | if(strict) |
---|
| 880 | return NULL; |
---|
| 881 | cell_length = cell_length & 0xFFFFFFF8; |
---|
| 882 | } |
---|
[145] | 883 | |
---|
[111] | 884 | if((num_values * sizeof(uint32)) > cell_length-sizeof(uint32)) |
---|
[137] | 885 | { |
---|
[140] | 886 | regfi_add_message(file, REGFI_MSG_WARN, "Too many values found" |
---|
[137] | 887 | " while parsing value list at offset 0x%.8X.", offset); |
---|
[145] | 888 | if(strict) |
---|
| 889 | return NULL; |
---|
| 890 | num_values = cell_length/sizeof(uint32) - sizeof(uint32); |
---|
[137] | 891 | } |
---|
[111] | 892 | |
---|
| 893 | read_len = num_values*sizeof(uint32); |
---|
[150] | 894 | ret_val = talloc(NULL, REGFI_VALUE_LIST); |
---|
[111] | 895 | if(ret_val == NULL) |
---|
| 896 | return NULL; |
---|
| 897 | |
---|
[150] | 898 | ret_val->elements = (REGFI_VALUE_LIST_ELEM*)talloc_size(ret_val, read_len); |
---|
[145] | 899 | if(ret_val->elements == NULL) |
---|
| 900 | { |
---|
[150] | 901 | talloc_free(ret_val); |
---|
[145] | 902 | return NULL; |
---|
| 903 | } |
---|
| 904 | ret_val->num_values = num_values; |
---|
| 905 | |
---|
[111] | 906 | length = read_len; |
---|
[145] | 907 | if((regfi_read(file->fd, (uint8*)ret_val->elements, &length) != 0) |
---|
| 908 | || length != read_len) |
---|
[111] | 909 | { |
---|
[138] | 910 | regfi_add_message(file, REGFI_MSG_ERROR, "Failed to read value pointers" |
---|
[137] | 911 | " while parsing value list at offset 0x%.8X.", offset); |
---|
[150] | 912 | talloc_free(ret_val); |
---|
[111] | 913 | return NULL; |
---|
| 914 | } |
---|
| 915 | |
---|
| 916 | for(i=0; i < num_values; i++) |
---|
| 917 | { |
---|
| 918 | /* Fix endianness */ |
---|
[145] | 919 | ret_val->elements[i] = IVAL(&ret_val->elements[i], 0); |
---|
[111] | 920 | |
---|
| 921 | /* Validate the first num_values values to ensure they make sense */ |
---|
| 922 | if(strict) |
---|
| 923 | { |
---|
[145] | 924 | /* XXX: Need to revisit this file length check when we start dealing |
---|
| 925 | * with partial files. */ |
---|
| 926 | if((ret_val->elements[i] + REGFI_REGF_SIZE > file->file_length) |
---|
| 927 | || ((ret_val->elements[i] & 0xFFFFFFF8) != ret_val->elements[i])) |
---|
[111] | 928 | { |
---|
[145] | 929 | regfi_add_message(file, REGFI_MSG_WARN, "Invalid value pointer" |
---|
[138] | 930 | " (0x%.8X) found while parsing value list at offset" |
---|
[145] | 931 | " 0x%.8X.", ret_val->elements[i], offset); |
---|
[150] | 932 | talloc_free(ret_val); |
---|
[111] | 933 | return NULL; |
---|
| 934 | } |
---|
| 935 | } |
---|
| 936 | } |
---|
| 937 | |
---|
| 938 | return ret_val; |
---|
| 939 | } |
---|
| 940 | |
---|
| 941 | |
---|
| 942 | |
---|
[103] | 943 | /****************************************************************************** |
---|
| 944 | ******************************************************************************/ |
---|
[150] | 945 | REGFI_VK_REC* regfi_load_value(REGFI_FILE* file, uint32 offset, bool strict) |
---|
[30] | 946 | { |
---|
[145] | 947 | REGFI_VK_REC* ret_val = NULL; |
---|
[146] | 948 | const REGFI_HBIN* hbin; |
---|
[145] | 949 | uint32 data_offset, data_maxsize; |
---|
[151] | 950 | REGFI_BUFFER data; |
---|
[30] | 951 | |
---|
[145] | 952 | hbin = regfi_lookup_hbin(file, offset - REGFI_REGF_SIZE); |
---|
| 953 | if(!hbin) |
---|
[103] | 954 | return NULL; |
---|
[145] | 955 | |
---|
| 956 | ret_val = regfi_parse_vk(file, offset, |
---|
| 957 | hbin->block_size + hbin->file_off - offset, strict); |
---|
[30] | 958 | |
---|
[103] | 959 | if(ret_val == NULL) |
---|
| 960 | return NULL; |
---|
[145] | 961 | |
---|
| 962 | if(ret_val->data_size == 0) |
---|
| 963 | ret_val->data = NULL; |
---|
| 964 | else |
---|
[32] | 965 | { |
---|
[145] | 966 | if(ret_val->data_in_offset) |
---|
[32] | 967 | { |
---|
[152] | 968 | data = regfi_load_data(file, ret_val->type, ret_val->data_off, |
---|
[151] | 969 | ret_val->data_size, 4, |
---|
| 970 | ret_val->data_in_offset, strict); |
---|
| 971 | ret_val->data = data.buf; |
---|
| 972 | ret_val->data_size = data.len; |
---|
[31] | 973 | } |
---|
[145] | 974 | else |
---|
| 975 | { |
---|
| 976 | hbin = regfi_lookup_hbin(file, ret_val->data_off); |
---|
| 977 | if(hbin) |
---|
[111] | 978 | { |
---|
[145] | 979 | data_offset = ret_val->data_off+REGFI_REGF_SIZE; |
---|
| 980 | data_maxsize = hbin->block_size + hbin->file_off - data_offset; |
---|
[152] | 981 | data = regfi_load_data(file, ret_val->type, data_offset, |
---|
[151] | 982 | ret_val->data_size, data_maxsize, |
---|
| 983 | ret_val->data_in_offset, strict); |
---|
| 984 | ret_val->data = data.buf; |
---|
| 985 | ret_val->data_size = data.len; |
---|
| 986 | |
---|
[111] | 987 | } |
---|
[145] | 988 | else |
---|
| 989 | { |
---|
| 990 | regfi_add_message(file, REGFI_MSG_WARN, "Could not find HBIN for data" |
---|
| 991 | " while parsing VK record at offset 0x%.8X.", |
---|
| 992 | ret_val->offset); |
---|
| 993 | ret_val->data = NULL; |
---|
| 994 | } |
---|
[103] | 995 | } |
---|
[145] | 996 | |
---|
| 997 | if(ret_val->data == NULL) |
---|
| 998 | { |
---|
| 999 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse data record" |
---|
[151] | 1000 | " while parsing VK record at offset 0x%.8X.", |
---|
[152] | 1001 | ret_val->offset, ret_val->valuename); |
---|
[145] | 1002 | } |
---|
[150] | 1003 | else |
---|
| 1004 | talloc_steal(ret_val, ret_val->data); |
---|
[31] | 1005 | } |
---|
[30] | 1006 | |
---|
[103] | 1007 | return ret_val; |
---|
[30] | 1008 | } |
---|
| 1009 | |
---|
| 1010 | |
---|
[145] | 1011 | /****************************************************************************** |
---|
| 1012 | * If !strict, the list may contain NULLs, VK records may point to NULL. |
---|
| 1013 | ******************************************************************************/ |
---|
| 1014 | REGFI_VALUE_LIST* regfi_load_valuelist(REGFI_FILE* file, uint32 offset, |
---|
[146] | 1015 | uint32 num_values, uint32 max_size, |
---|
[145] | 1016 | bool strict) |
---|
| 1017 | { |
---|
| 1018 | uint32 usable_num_values; |
---|
[30] | 1019 | |
---|
[145] | 1020 | if((num_values+1) * sizeof(uint32) > max_size) |
---|
| 1021 | { |
---|
| 1022 | regfi_add_message(file, REGFI_MSG_WARN, "Number of values indicated by" |
---|
| 1023 | " parent key (%d) would cause cell to straddle HBIN" |
---|
| 1024 | " boundary while loading value list at offset" |
---|
| 1025 | " 0x%.8X.", num_values, offset); |
---|
| 1026 | if(strict) |
---|
| 1027 | return NULL; |
---|
| 1028 | usable_num_values = max_size/sizeof(uint32) - sizeof(uint32); |
---|
| 1029 | } |
---|
| 1030 | else |
---|
| 1031 | usable_num_values = num_values; |
---|
| 1032 | |
---|
| 1033 | return regfi_parse_valuelist(file, offset, usable_num_values, strict); |
---|
| 1034 | } |
---|
| 1035 | |
---|
| 1036 | |
---|
| 1037 | |
---|
[146] | 1038 | /****************************************************************************** |
---|
| 1039 | * |
---|
| 1040 | ******************************************************************************/ |
---|
[135] | 1041 | REGFI_NK_REC* regfi_load_key(REGFI_FILE* file, uint32 offset, bool strict) |
---|
[30] | 1042 | { |
---|
[146] | 1043 | const REGFI_HBIN* hbin; |
---|
| 1044 | const REGFI_HBIN* sub_hbin; |
---|
[135] | 1045 | REGFI_NK_REC* nk; |
---|
[105] | 1046 | uint32 max_length, off; |
---|
[99] | 1047 | |
---|
[135] | 1048 | hbin = regfi_lookup_hbin(file, offset-REGFI_REGF_SIZE); |
---|
[105] | 1049 | if (hbin == NULL) |
---|
| 1050 | return NULL; |
---|
[30] | 1051 | |
---|
[31] | 1052 | /* get the initial nk record */ |
---|
[105] | 1053 | max_length = hbin->block_size + hbin->file_off - offset; |
---|
[146] | 1054 | if((nk = regfi_parse_nk(file, offset, max_length, true)) == NULL) |
---|
[135] | 1055 | { |
---|
[138] | 1056 | regfi_add_message(file, REGFI_MSG_ERROR, "Could not load NK record at" |
---|
[137] | 1057 | " offset 0x%.8X.", offset); |
---|
[99] | 1058 | return NULL; |
---|
[135] | 1059 | } |
---|
[30] | 1060 | |
---|
[146] | 1061 | /* get value list */ |
---|
[135] | 1062 | if(nk->num_values && (nk->values_off!=REGFI_OFFSET_NONE)) |
---|
[32] | 1063 | { |
---|
[31] | 1064 | sub_hbin = hbin; |
---|
[106] | 1065 | if(!regfi_offset_in_hbin(hbin, nk->values_off)) |
---|
| 1066 | sub_hbin = regfi_lookup_hbin(file, nk->values_off); |
---|
[105] | 1067 | |
---|
| 1068 | if(sub_hbin == NULL) |
---|
[32] | 1069 | { |
---|
[105] | 1070 | if(strict) |
---|
[32] | 1071 | { |
---|
[150] | 1072 | regfi_free_key(nk); |
---|
[99] | 1073 | return NULL; |
---|
[31] | 1074 | } |
---|
[105] | 1075 | else |
---|
| 1076 | nk->values = NULL; |
---|
[133] | 1077 | |
---|
[31] | 1078 | } |
---|
[105] | 1079 | else |
---|
[103] | 1080 | { |
---|
[135] | 1081 | off = nk->values_off + REGFI_REGF_SIZE; |
---|
[105] | 1082 | max_length = sub_hbin->block_size + sub_hbin->file_off - off; |
---|
| 1083 | nk->values = regfi_load_valuelist(file, off, nk->num_values, max_length, |
---|
| 1084 | true); |
---|
[145] | 1085 | if(nk->values == NULL) |
---|
[105] | 1086 | { |
---|
[145] | 1087 | regfi_add_message(file, REGFI_MSG_WARN, "Could not load value list" |
---|
| 1088 | " for NK record at offset 0x%.8X.", offset); |
---|
| 1089 | if(strict) |
---|
| 1090 | { |
---|
[150] | 1091 | regfi_free_key(nk); |
---|
[145] | 1092 | return NULL; |
---|
| 1093 | } |
---|
[105] | 1094 | } |
---|
[150] | 1095 | talloc_steal(nk, nk->values); |
---|
[103] | 1096 | } |
---|
[31] | 1097 | } |
---|
[105] | 1098 | |
---|
[146] | 1099 | /* now get subkey list */ |
---|
[135] | 1100 | if(nk->num_subkeys && (nk->subkeys_off != REGFI_OFFSET_NONE)) |
---|
[32] | 1101 | { |
---|
[31] | 1102 | sub_hbin = hbin; |
---|
[106] | 1103 | if(!regfi_offset_in_hbin(hbin, nk->subkeys_off)) |
---|
| 1104 | sub_hbin = regfi_lookup_hbin(file, nk->subkeys_off); |
---|
[105] | 1105 | |
---|
[150] | 1106 | if(sub_hbin == NULL) |
---|
[32] | 1107 | { |
---|
[105] | 1108 | if(strict) |
---|
[32] | 1109 | { |
---|
[150] | 1110 | regfi_free_key(nk); |
---|
[99] | 1111 | return NULL; |
---|
[31] | 1112 | } |
---|
[105] | 1113 | else |
---|
| 1114 | nk->subkeys = NULL; |
---|
[31] | 1115 | } |
---|
[105] | 1116 | else |
---|
[104] | 1117 | { |
---|
[135] | 1118 | off = nk->subkeys_off + REGFI_REGF_SIZE; |
---|
[105] | 1119 | max_length = sub_hbin->block_size + sub_hbin->file_off - off; |
---|
[134] | 1120 | nk->subkeys = regfi_load_subkeylist(file, off, nk->num_subkeys, |
---|
[127] | 1121 | max_length, true); |
---|
[134] | 1122 | |
---|
[105] | 1123 | if(nk->subkeys == NULL) |
---|
| 1124 | { |
---|
[140] | 1125 | regfi_add_message(file, REGFI_MSG_WARN, "Could not load subkey list" |
---|
| 1126 | " while parsing NK record at offset 0x%.8X.", offset); |
---|
[105] | 1127 | nk->num_subkeys = 0; |
---|
| 1128 | } |
---|
[150] | 1129 | talloc_steal(nk, nk->subkeys); |
---|
[104] | 1130 | } |
---|
[31] | 1131 | } |
---|
[30] | 1132 | |
---|
[99] | 1133 | return nk; |
---|
[30] | 1134 | } |
---|
| 1135 | |
---|
[32] | 1136 | |
---|
[102] | 1137 | /****************************************************************************** |
---|
| 1138 | ******************************************************************************/ |
---|
[146] | 1139 | const REGFI_SK_REC* regfi_load_sk(REGFI_FILE* file, uint32 offset, bool strict) |
---|
| 1140 | { |
---|
| 1141 | REGFI_SK_REC* ret_val = NULL; |
---|
| 1142 | const REGFI_HBIN* hbin; |
---|
| 1143 | uint32 max_length; |
---|
[147] | 1144 | void* failure_ptr = NULL; |
---|
| 1145 | |
---|
[146] | 1146 | /* First look if we have already parsed it */ |
---|
| 1147 | ret_val = (REGFI_SK_REC*)lru_cache_find(file->sk_cache, &offset, 4); |
---|
| 1148 | |
---|
| 1149 | /* Bail out if we have previously cached a parse failure at this offset. */ |
---|
| 1150 | if(ret_val == (void*)REGFI_OFFSET_NONE) |
---|
| 1151 | return NULL; |
---|
| 1152 | |
---|
| 1153 | if(ret_val == NULL) |
---|
| 1154 | { |
---|
| 1155 | hbin = regfi_lookup_hbin(file, offset - REGFI_REGF_SIZE); |
---|
| 1156 | if(hbin == NULL) |
---|
| 1157 | return NULL; |
---|
| 1158 | |
---|
| 1159 | max_length = hbin->block_size + hbin->file_off - offset; |
---|
| 1160 | ret_val = regfi_parse_sk(file, offset, max_length, strict); |
---|
| 1161 | if(ret_val == NULL) |
---|
| 1162 | { /* Cache the parse failure and bail out. */ |
---|
[147] | 1163 | failure_ptr = talloc(NULL, uint32_t); |
---|
| 1164 | if(failure_ptr == NULL) |
---|
| 1165 | return NULL; |
---|
| 1166 | *(uint32_t*)failure_ptr = REGFI_OFFSET_NONE; |
---|
| 1167 | lru_cache_update(file->sk_cache, &offset, 4, failure_ptr); |
---|
[146] | 1168 | return NULL; |
---|
| 1169 | } |
---|
| 1170 | |
---|
| 1171 | lru_cache_update(file->sk_cache, &offset, 4, ret_val); |
---|
| 1172 | } |
---|
| 1173 | |
---|
| 1174 | return ret_val; |
---|
| 1175 | } |
---|
| 1176 | |
---|
| 1177 | |
---|
| 1178 | |
---|
| 1179 | /****************************************************************************** |
---|
| 1180 | ******************************************************************************/ |
---|
| 1181 | static bool regfi_find_root_nk(REGFI_FILE* file, uint32 offset,uint32 hbin_size, |
---|
[102] | 1182 | uint32* root_offset) |
---|
[30] | 1183 | { |
---|
[102] | 1184 | uint8 tmp[4]; |
---|
| 1185 | int32 record_size; |
---|
| 1186 | uint32 length, hbin_offset = 0; |
---|
[135] | 1187 | REGFI_NK_REC* nk = NULL; |
---|
[31] | 1188 | bool found = false; |
---|
[30] | 1189 | |
---|
[102] | 1190 | for(record_size=0; !found && (hbin_offset < hbin_size); ) |
---|
[32] | 1191 | { |
---|
[102] | 1192 | if(lseek(file->fd, offset+hbin_offset, SEEK_SET) == -1) |
---|
[31] | 1193 | return false; |
---|
[102] | 1194 | |
---|
| 1195 | length = 4; |
---|
| 1196 | if((regfi_read(file->fd, tmp, &length) != 0) || length != 4) |
---|
[31] | 1197 | return false; |
---|
[102] | 1198 | record_size = IVALS(tmp, 0); |
---|
[30] | 1199 | |
---|
[102] | 1200 | if(record_size < 0) |
---|
| 1201 | { |
---|
| 1202 | record_size = record_size*(-1); |
---|
| 1203 | nk = regfi_parse_nk(file, offset+hbin_offset, hbin_size-hbin_offset, true); |
---|
| 1204 | if(nk != NULL) |
---|
| 1205 | { |
---|
[152] | 1206 | if(nk->key_type & REGFI_NK_FLAG_ROOT) |
---|
[102] | 1207 | { |
---|
| 1208 | found = true; |
---|
| 1209 | *root_offset = nk->offset; |
---|
| 1210 | } |
---|
[150] | 1211 | regfi_free_key(nk); |
---|
[102] | 1212 | } |
---|
[31] | 1213 | } |
---|
[30] | 1214 | |
---|
[102] | 1215 | hbin_offset += record_size; |
---|
[31] | 1216 | } |
---|
[32] | 1217 | |
---|
[102] | 1218 | return found; |
---|
[30] | 1219 | } |
---|
| 1220 | |
---|
| 1221 | |
---|
| 1222 | /******************************************************************* |
---|
[97] | 1223 | * Open the registry file and then read in the REGF block to get the |
---|
| 1224 | * first hbin offset. |
---|
| 1225 | *******************************************************************/ |
---|
[135] | 1226 | REGFI_FILE* regfi_open(const char* filename) |
---|
[30] | 1227 | { |
---|
[137] | 1228 | struct stat sbuf; |
---|
[135] | 1229 | REGFI_FILE* rb; |
---|
| 1230 | REGFI_HBIN* hbin = NULL; |
---|
[146] | 1231 | uint32 hbin_off, file_length, cache_secret; |
---|
[97] | 1232 | int fd; |
---|
[110] | 1233 | bool rla; |
---|
[30] | 1234 | |
---|
[97] | 1235 | /* open an existing file */ |
---|
[143] | 1236 | if ((fd = open(filename, REGFI_OPEN_FLAGS)) == -1) |
---|
[97] | 1237 | { |
---|
[143] | 1238 | /* fprintf(stderr, "regfi_open: failure to open %s (%s)\n", filename, strerror(errno));*/ |
---|
[31] | 1239 | return NULL; |
---|
| 1240 | } |
---|
[99] | 1241 | |
---|
[137] | 1242 | /* Determine file length. Must be at least big enough |
---|
| 1243 | * for the header and one hbin. |
---|
| 1244 | */ |
---|
| 1245 | if (fstat(fd, &sbuf) == -1) |
---|
| 1246 | return NULL; |
---|
| 1247 | file_length = sbuf.st_size; |
---|
| 1248 | if(file_length < REGFI_REGF_SIZE+REGFI_HBIN_ALLOC) |
---|
| 1249 | return NULL; |
---|
| 1250 | |
---|
[31] | 1251 | /* read in an existing file */ |
---|
[97] | 1252 | if ((rb = regfi_parse_regf(fd, true)) == NULL) |
---|
| 1253 | { |
---|
[143] | 1254 | /* fprintf(stderr, "regfi_open: Failed to read initial REGF block\n"); */ |
---|
[97] | 1255 | close(fd); |
---|
[31] | 1256 | return NULL; |
---|
| 1257 | } |
---|
[137] | 1258 | rb->file_length = file_length; |
---|
| 1259 | |
---|
[99] | 1260 | rb->hbins = range_list_new(); |
---|
[110] | 1261 | if(rb->hbins == NULL) |
---|
[99] | 1262 | { |
---|
[143] | 1263 | /* fprintf(stderr, "regfi_open: Failed to create HBIN list.\n"); */ |
---|
[99] | 1264 | close(fd); |
---|
[150] | 1265 | talloc_free(rb); |
---|
[99] | 1266 | return NULL; |
---|
| 1267 | } |
---|
[150] | 1268 | talloc_steal(rb, rb->hbins); |
---|
| 1269 | |
---|
[106] | 1270 | rla = true; |
---|
[135] | 1271 | hbin_off = REGFI_REGF_SIZE; |
---|
[110] | 1272 | hbin = regfi_parse_hbin(rb, hbin_off, true); |
---|
[106] | 1273 | while(hbin && rla) |
---|
| 1274 | { |
---|
[137] | 1275 | rla = range_list_add(rb->hbins, hbin->file_off, hbin->block_size, hbin); |
---|
[148] | 1276 | if(rla) |
---|
| 1277 | talloc_steal(rb->hbins, hbin); |
---|
[106] | 1278 | hbin_off = hbin->file_off + hbin->block_size; |
---|
[110] | 1279 | hbin = regfi_parse_hbin(rb, hbin_off, true); |
---|
[106] | 1280 | } |
---|
| 1281 | |
---|
[146] | 1282 | /* This secret isn't very secret, but we don't need a good one. This |
---|
| 1283 | * secret is just designed to prevent someone from trying to blow our |
---|
| 1284 | * caching and make things slow. |
---|
| 1285 | */ |
---|
| 1286 | cache_secret = 0x15DEAD05^time(NULL)^(getpid()<<16); |
---|
| 1287 | |
---|
| 1288 | /* Cache an unlimited number of SK records. Typically there are very few. */ |
---|
[150] | 1289 | rb->sk_cache = lru_cache_create_ctx(rb, 0, cache_secret, true); |
---|
[146] | 1290 | |
---|
[138] | 1291 | /* Default message mask */ |
---|
| 1292 | rb->msg_mask = REGFI_MSG_ERROR|REGFI_MSG_WARN; |
---|
| 1293 | |
---|
[31] | 1294 | /* success */ |
---|
| 1295 | return rb; |
---|
[30] | 1296 | } |
---|
| 1297 | |
---|
| 1298 | |
---|
[148] | 1299 | /****************************************************************************** |
---|
| 1300 | ******************************************************************************/ |
---|
[146] | 1301 | int regfi_close(REGFI_FILE *file) |
---|
[30] | 1302 | { |
---|
[31] | 1303 | int fd; |
---|
[30] | 1304 | |
---|
[31] | 1305 | /* nothing to do if there is no open file */ |
---|
[99] | 1306 | if ((file == NULL) || (file->fd == -1)) |
---|
| 1307 | return 0; |
---|
[30] | 1308 | |
---|
[31] | 1309 | fd = file->fd; |
---|
| 1310 | file->fd = -1; |
---|
[148] | 1311 | |
---|
[99] | 1312 | range_list_free(file->hbins); |
---|
[106] | 1313 | |
---|
[146] | 1314 | if(file->sk_cache != NULL) |
---|
| 1315 | lru_cache_destroy(file->sk_cache); |
---|
[148] | 1316 | |
---|
[150] | 1317 | talloc_free(file); |
---|
[106] | 1318 | return close(fd); |
---|
[30] | 1319 | } |
---|
| 1320 | |
---|
| 1321 | |
---|
[80] | 1322 | /****************************************************************************** |
---|
| 1323 | * There should be only *one* root key in the registry file based |
---|
| 1324 | * on my experience. --jerry |
---|
[148] | 1325 | ******************************************************************************/ |
---|
[135] | 1326 | REGFI_NK_REC* regfi_rootkey(REGFI_FILE *file) |
---|
[30] | 1327 | { |
---|
[135] | 1328 | REGFI_NK_REC* nk = NULL; |
---|
[146] | 1329 | REGFI_HBIN* hbin; |
---|
| 1330 | uint32 root_offset, i, num_hbins; |
---|
[99] | 1331 | |
---|
| 1332 | if(!file) |
---|
[31] | 1333 | return NULL; |
---|
[99] | 1334 | |
---|
[102] | 1335 | /* Scan through the file one HBIN block at a time looking |
---|
[146] | 1336 | * for an NK record with a root key type. |
---|
| 1337 | * This is typically the first NK record in the first HBIN |
---|
| 1338 | * block (but we're not assuming that generally). |
---|
| 1339 | */ |
---|
[107] | 1340 | num_hbins = range_list_size(file->hbins); |
---|
| 1341 | for(i=0; i < num_hbins; i++) |
---|
[99] | 1342 | { |
---|
[135] | 1343 | hbin = (REGFI_HBIN*)range_list_get(file->hbins, i)->data; |
---|
| 1344 | if(regfi_find_root_nk(file, hbin->file_off+REGFI_HBIN_HEADER_SIZE, |
---|
| 1345 | hbin->block_size-REGFI_HBIN_HEADER_SIZE, &root_offset)) |
---|
[99] | 1346 | { |
---|
[105] | 1347 | nk = regfi_load_key(file, root_offset, true); |
---|
[102] | 1348 | break; |
---|
[31] | 1349 | } |
---|
| 1350 | } |
---|
[30] | 1351 | |
---|
[80] | 1352 | return nk; |
---|
[30] | 1353 | } |
---|
| 1354 | |
---|
| 1355 | |
---|
[80] | 1356 | /****************************************************************************** |
---|
| 1357 | *****************************************************************************/ |
---|
[150] | 1358 | void regfi_free_key(REGFI_NK_REC* nk) |
---|
[30] | 1359 | { |
---|
[127] | 1360 | regfi_subkeylist_free(nk->subkeys); |
---|
[150] | 1361 | talloc_free(nk); |
---|
| 1362 | } |
---|
[127] | 1363 | |
---|
[80] | 1364 | |
---|
[150] | 1365 | /****************************************************************************** |
---|
| 1366 | *****************************************************************************/ |
---|
| 1367 | void regfi_free_value(REGFI_VK_REC* vk) |
---|
| 1368 | { |
---|
| 1369 | talloc_free(vk); |
---|
[80] | 1370 | } |
---|
| 1371 | |
---|
| 1372 | |
---|
| 1373 | /****************************************************************************** |
---|
| 1374 | *****************************************************************************/ |
---|
[135] | 1375 | void regfi_subkeylist_free(REGFI_SUBKEY_LIST* list) |
---|
[127] | 1376 | { |
---|
| 1377 | if(list != NULL) |
---|
| 1378 | { |
---|
[150] | 1379 | talloc_free(list); |
---|
[127] | 1380 | } |
---|
| 1381 | } |
---|
| 1382 | |
---|
| 1383 | |
---|
| 1384 | /****************************************************************************** |
---|
| 1385 | *****************************************************************************/ |
---|
[135] | 1386 | REGFI_ITERATOR* regfi_iterator_new(REGFI_FILE* fh) |
---|
[80] | 1387 | { |
---|
[135] | 1388 | REGFI_NK_REC* root; |
---|
[150] | 1389 | REGFI_ITERATOR* ret_val = talloc(NULL, REGFI_ITERATOR); |
---|
[80] | 1390 | if(ret_val == NULL) |
---|
| 1391 | return NULL; |
---|
| 1392 | |
---|
[81] | 1393 | root = regfi_rootkey(fh); |
---|
[80] | 1394 | if(root == NULL) |
---|
| 1395 | { |
---|
[150] | 1396 | talloc_free(ret_val); |
---|
[80] | 1397 | return NULL; |
---|
| 1398 | } |
---|
| 1399 | |
---|
[135] | 1400 | ret_val->key_positions = void_stack_new(REGFI_MAX_DEPTH); |
---|
[80] | 1401 | if(ret_val->key_positions == NULL) |
---|
| 1402 | { |
---|
[150] | 1403 | talloc_free(ret_val); |
---|
[80] | 1404 | return NULL; |
---|
| 1405 | } |
---|
[150] | 1406 | talloc_steal(ret_val, ret_val->key_positions); |
---|
[80] | 1407 | |
---|
| 1408 | ret_val->f = fh; |
---|
| 1409 | ret_val->cur_key = root; |
---|
| 1410 | ret_val->cur_subkey = 0; |
---|
| 1411 | ret_val->cur_value = 0; |
---|
| 1412 | |
---|
| 1413 | return ret_val; |
---|
| 1414 | } |
---|
| 1415 | |
---|
| 1416 | |
---|
| 1417 | /****************************************************************************** |
---|
| 1418 | *****************************************************************************/ |
---|
| 1419 | void regfi_iterator_free(REGFI_ITERATOR* i) |
---|
| 1420 | { |
---|
[150] | 1421 | talloc_free(i); |
---|
[80] | 1422 | } |
---|
| 1423 | |
---|
| 1424 | |
---|
| 1425 | |
---|
| 1426 | /****************************************************************************** |
---|
| 1427 | *****************************************************************************/ |
---|
| 1428 | /* XXX: some way of indicating reason for failure should be added. */ |
---|
| 1429 | bool regfi_iterator_down(REGFI_ITERATOR* i) |
---|
| 1430 | { |
---|
[135] | 1431 | REGFI_NK_REC* subkey; |
---|
[80] | 1432 | REGFI_ITER_POSITION* pos; |
---|
| 1433 | |
---|
[150] | 1434 | pos = talloc(i->key_positions, REGFI_ITER_POSITION); |
---|
[80] | 1435 | if(pos == NULL) |
---|
| 1436 | return false; |
---|
| 1437 | |
---|
[135] | 1438 | subkey = (REGFI_NK_REC*)regfi_iterator_cur_subkey(i); |
---|
[80] | 1439 | if(subkey == NULL) |
---|
| 1440 | { |
---|
[150] | 1441 | talloc_free(pos); |
---|
[80] | 1442 | return false; |
---|
| 1443 | } |
---|
| 1444 | |
---|
| 1445 | pos->nk = i->cur_key; |
---|
| 1446 | pos->cur_subkey = i->cur_subkey; |
---|
| 1447 | if(!void_stack_push(i->key_positions, pos)) |
---|
| 1448 | { |
---|
[150] | 1449 | talloc_free(pos); |
---|
| 1450 | regfi_free_key(subkey); |
---|
[80] | 1451 | return false; |
---|
| 1452 | } |
---|
[150] | 1453 | talloc_steal(i, subkey); |
---|
[80] | 1454 | |
---|
| 1455 | i->cur_key = subkey; |
---|
| 1456 | i->cur_subkey = 0; |
---|
| 1457 | i->cur_value = 0; |
---|
| 1458 | |
---|
| 1459 | return true; |
---|
| 1460 | } |
---|
| 1461 | |
---|
| 1462 | |
---|
| 1463 | /****************************************************************************** |
---|
| 1464 | *****************************************************************************/ |
---|
| 1465 | bool regfi_iterator_up(REGFI_ITERATOR* i) |
---|
| 1466 | { |
---|
| 1467 | REGFI_ITER_POSITION* pos; |
---|
| 1468 | |
---|
| 1469 | pos = (REGFI_ITER_POSITION*)void_stack_pop(i->key_positions); |
---|
| 1470 | if(pos == NULL) |
---|
| 1471 | return false; |
---|
| 1472 | |
---|
[150] | 1473 | regfi_free_key(i->cur_key); |
---|
[80] | 1474 | i->cur_key = pos->nk; |
---|
| 1475 | i->cur_subkey = pos->cur_subkey; |
---|
| 1476 | i->cur_value = 0; |
---|
[150] | 1477 | talloc_free(pos); |
---|
[80] | 1478 | |
---|
| 1479 | return true; |
---|
| 1480 | } |
---|
| 1481 | |
---|
| 1482 | |
---|
| 1483 | /****************************************************************************** |
---|
| 1484 | *****************************************************************************/ |
---|
| 1485 | bool regfi_iterator_to_root(REGFI_ITERATOR* i) |
---|
| 1486 | { |
---|
| 1487 | while(regfi_iterator_up(i)) |
---|
| 1488 | continue; |
---|
| 1489 | |
---|
| 1490 | return true; |
---|
| 1491 | } |
---|
| 1492 | |
---|
| 1493 | |
---|
| 1494 | /****************************************************************************** |
---|
| 1495 | *****************************************************************************/ |
---|
| 1496 | bool regfi_iterator_find_subkey(REGFI_ITERATOR* i, const char* subkey_name) |
---|
| 1497 | { |
---|
[135] | 1498 | REGFI_NK_REC* subkey; |
---|
[80] | 1499 | bool found = false; |
---|
| 1500 | uint32 old_subkey = i->cur_subkey; |
---|
[133] | 1501 | |
---|
[80] | 1502 | if(subkey_name == NULL) |
---|
| 1503 | return false; |
---|
| 1504 | |
---|
| 1505 | /* XXX: this alloc/free of each sub key might be a bit excessive */ |
---|
[135] | 1506 | subkey = (REGFI_NK_REC*)regfi_iterator_first_subkey(i); |
---|
[80] | 1507 | while((subkey != NULL) && (found == false)) |
---|
| 1508 | { |
---|
| 1509 | if(subkey->keyname != NULL |
---|
| 1510 | && strcasecmp(subkey->keyname, subkey_name) == 0) |
---|
| 1511 | found = true; |
---|
[82] | 1512 | else |
---|
| 1513 | { |
---|
[150] | 1514 | regfi_free_key(subkey); |
---|
[135] | 1515 | subkey = (REGFI_NK_REC*)regfi_iterator_next_subkey(i); |
---|
[82] | 1516 | } |
---|
[80] | 1517 | } |
---|
| 1518 | |
---|
| 1519 | if(found == false) |
---|
| 1520 | { |
---|
| 1521 | i->cur_subkey = old_subkey; |
---|
| 1522 | return false; |
---|
| 1523 | } |
---|
| 1524 | |
---|
[150] | 1525 | regfi_free_key(subkey); |
---|
[80] | 1526 | return true; |
---|
| 1527 | } |
---|
| 1528 | |
---|
| 1529 | |
---|
| 1530 | /****************************************************************************** |
---|
| 1531 | *****************************************************************************/ |
---|
| 1532 | bool regfi_iterator_walk_path(REGFI_ITERATOR* i, const char** path) |
---|
| 1533 | { |
---|
| 1534 | uint32 x; |
---|
| 1535 | if(path == NULL) |
---|
| 1536 | return false; |
---|
| 1537 | |
---|
| 1538 | for(x=0; |
---|
| 1539 | ((path[x] != NULL) && regfi_iterator_find_subkey(i, path[x]) |
---|
| 1540 | && regfi_iterator_down(i)); |
---|
| 1541 | x++) |
---|
| 1542 | { continue; } |
---|
| 1543 | |
---|
| 1544 | if(path[x] == NULL) |
---|
| 1545 | return true; |
---|
| 1546 | |
---|
| 1547 | /* XXX: is this the right number of times? */ |
---|
| 1548 | for(; x > 0; x--) |
---|
| 1549 | regfi_iterator_up(i); |
---|
| 1550 | |
---|
| 1551 | return false; |
---|
| 1552 | } |
---|
| 1553 | |
---|
| 1554 | |
---|
| 1555 | /****************************************************************************** |
---|
| 1556 | *****************************************************************************/ |
---|
[135] | 1557 | const REGFI_NK_REC* regfi_iterator_cur_key(REGFI_ITERATOR* i) |
---|
[80] | 1558 | { |
---|
| 1559 | return i->cur_key; |
---|
| 1560 | } |
---|
| 1561 | |
---|
| 1562 | |
---|
| 1563 | /****************************************************************************** |
---|
| 1564 | *****************************************************************************/ |
---|
[135] | 1565 | const REGFI_SK_REC* regfi_iterator_cur_sk(REGFI_ITERATOR* i) |
---|
[109] | 1566 | { |
---|
[146] | 1567 | if(i->cur_key == NULL || i->cur_key->sk_off == REGFI_OFFSET_NONE) |
---|
[109] | 1568 | return NULL; |
---|
| 1569 | |
---|
[146] | 1570 | return regfi_load_sk(i->f, i->cur_key->sk_off + REGFI_REGF_SIZE, true); |
---|
[109] | 1571 | } |
---|
| 1572 | |
---|
| 1573 | |
---|
| 1574 | /****************************************************************************** |
---|
| 1575 | *****************************************************************************/ |
---|
[150] | 1576 | REGFI_NK_REC* regfi_iterator_first_subkey(REGFI_ITERATOR* i) |
---|
[80] | 1577 | { |
---|
| 1578 | i->cur_subkey = 0; |
---|
| 1579 | return regfi_iterator_cur_subkey(i); |
---|
| 1580 | } |
---|
| 1581 | |
---|
| 1582 | |
---|
| 1583 | /****************************************************************************** |
---|
| 1584 | *****************************************************************************/ |
---|
[150] | 1585 | REGFI_NK_REC* regfi_iterator_cur_subkey(REGFI_ITERATOR* i) |
---|
[80] | 1586 | { |
---|
| 1587 | uint32 nk_offset; |
---|
| 1588 | |
---|
[31] | 1589 | /* see if there is anything left to report */ |
---|
[135] | 1590 | if (!(i->cur_key) || (i->cur_key->subkeys_off==REGFI_OFFSET_NONE) |
---|
[80] | 1591 | || (i->cur_subkey >= i->cur_key->num_subkeys)) |
---|
[31] | 1592 | return NULL; |
---|
[30] | 1593 | |
---|
[139] | 1594 | nk_offset = i->cur_key->subkeys->elements[i->cur_subkey].offset; |
---|
[133] | 1595 | |
---|
[135] | 1596 | return regfi_load_key(i->f, nk_offset+REGFI_REGF_SIZE, true); |
---|
[30] | 1597 | } |
---|
[80] | 1598 | |
---|
| 1599 | |
---|
| 1600 | /****************************************************************************** |
---|
| 1601 | *****************************************************************************/ |
---|
| 1602 | /* XXX: some way of indicating reason for failure should be added. */ |
---|
[150] | 1603 | REGFI_NK_REC* regfi_iterator_next_subkey(REGFI_ITERATOR* i) |
---|
[80] | 1604 | { |
---|
[150] | 1605 | REGFI_NK_REC* subkey; |
---|
[80] | 1606 | |
---|
| 1607 | i->cur_subkey++; |
---|
| 1608 | subkey = regfi_iterator_cur_subkey(i); |
---|
| 1609 | |
---|
| 1610 | if(subkey == NULL) |
---|
| 1611 | i->cur_subkey--; |
---|
| 1612 | |
---|
| 1613 | return subkey; |
---|
| 1614 | } |
---|
| 1615 | |
---|
| 1616 | |
---|
| 1617 | /****************************************************************************** |
---|
| 1618 | *****************************************************************************/ |
---|
| 1619 | bool regfi_iterator_find_value(REGFI_ITERATOR* i, const char* value_name) |
---|
| 1620 | { |
---|
[150] | 1621 | REGFI_VK_REC* cur; |
---|
[80] | 1622 | bool found = false; |
---|
| 1623 | |
---|
| 1624 | /* XXX: cur->valuename can be NULL in the registry. |
---|
| 1625 | * Should we allow for a way to search for that? |
---|
| 1626 | */ |
---|
| 1627 | if(value_name == NULL) |
---|
| 1628 | return false; |
---|
| 1629 | |
---|
| 1630 | cur = regfi_iterator_first_value(i); |
---|
| 1631 | while((cur != NULL) && (found == false)) |
---|
| 1632 | { |
---|
| 1633 | if((cur->valuename != NULL) |
---|
| 1634 | && (strcasecmp(cur->valuename, value_name) == 0)) |
---|
| 1635 | found = true; |
---|
[95] | 1636 | else |
---|
[150] | 1637 | { |
---|
| 1638 | regfi_free_value(cur); |
---|
[95] | 1639 | cur = regfi_iterator_next_value(i); |
---|
[150] | 1640 | } |
---|
[80] | 1641 | } |
---|
| 1642 | |
---|
[94] | 1643 | return found; |
---|
[80] | 1644 | } |
---|
| 1645 | |
---|
| 1646 | |
---|
| 1647 | /****************************************************************************** |
---|
| 1648 | *****************************************************************************/ |
---|
[150] | 1649 | REGFI_VK_REC* regfi_iterator_first_value(REGFI_ITERATOR* i) |
---|
[80] | 1650 | { |
---|
| 1651 | i->cur_value = 0; |
---|
| 1652 | return regfi_iterator_cur_value(i); |
---|
| 1653 | } |
---|
| 1654 | |
---|
| 1655 | |
---|
| 1656 | /****************************************************************************** |
---|
| 1657 | *****************************************************************************/ |
---|
[150] | 1658 | REGFI_VK_REC* regfi_iterator_cur_value(REGFI_ITERATOR* i) |
---|
[80] | 1659 | { |
---|
[150] | 1660 | REGFI_VK_REC* ret_val = NULL; |
---|
[145] | 1661 | uint32 voffset; |
---|
[80] | 1662 | |
---|
[145] | 1663 | if(i->cur_key->values != NULL && i->cur_key->values->elements != NULL) |
---|
| 1664 | { |
---|
| 1665 | if(i->cur_value < i->cur_key->values->num_values) |
---|
| 1666 | { |
---|
| 1667 | voffset = i->cur_key->values->elements[i->cur_value]; |
---|
| 1668 | ret_val = regfi_load_value(i->f, voffset+REGFI_REGF_SIZE, true); |
---|
| 1669 | } |
---|
| 1670 | } |
---|
| 1671 | |
---|
[80] | 1672 | return ret_val; |
---|
| 1673 | } |
---|
| 1674 | |
---|
| 1675 | |
---|
| 1676 | /****************************************************************************** |
---|
| 1677 | *****************************************************************************/ |
---|
[150] | 1678 | REGFI_VK_REC* regfi_iterator_next_value(REGFI_ITERATOR* i) |
---|
[80] | 1679 | { |
---|
[150] | 1680 | REGFI_VK_REC* ret_val; |
---|
[80] | 1681 | |
---|
| 1682 | i->cur_value++; |
---|
| 1683 | ret_val = regfi_iterator_cur_value(i); |
---|
| 1684 | if(ret_val == NULL) |
---|
| 1685 | i->cur_value--; |
---|
| 1686 | |
---|
| 1687 | return ret_val; |
---|
| 1688 | } |
---|
[97] | 1689 | |
---|
| 1690 | |
---|
| 1691 | /******************************************************************* |
---|
| 1692 | * Computes the checksum of the registry file header. |
---|
| 1693 | * buffer must be at least the size of an regf header (4096 bytes). |
---|
| 1694 | *******************************************************************/ |
---|
| 1695 | static uint32 regfi_compute_header_checksum(uint8* buffer) |
---|
| 1696 | { |
---|
| 1697 | uint32 checksum, x; |
---|
| 1698 | int i; |
---|
| 1699 | |
---|
| 1700 | /* XOR of all bytes 0x0000 - 0x01FB */ |
---|
| 1701 | |
---|
| 1702 | checksum = x = 0; |
---|
| 1703 | |
---|
| 1704 | for ( i=0; i<0x01FB; i+=4 ) { |
---|
| 1705 | x = IVAL(buffer, i ); |
---|
| 1706 | checksum ^= x; |
---|
| 1707 | } |
---|
| 1708 | |
---|
| 1709 | return checksum; |
---|
| 1710 | } |
---|
| 1711 | |
---|
| 1712 | |
---|
| 1713 | /******************************************************************* |
---|
[116] | 1714 | * XXX: Add way to return more detailed error information. |
---|
[97] | 1715 | *******************************************************************/ |
---|
[135] | 1716 | REGFI_FILE* regfi_parse_regf(int fd, bool strict) |
---|
[97] | 1717 | { |
---|
[135] | 1718 | uint8 file_header[REGFI_REGF_SIZE]; |
---|
[102] | 1719 | uint32 length; |
---|
[135] | 1720 | REGFI_FILE* ret_val; |
---|
[97] | 1721 | |
---|
[150] | 1722 | ret_val = talloc(NULL, REGFI_FILE); |
---|
[97] | 1723 | if(ret_val == NULL) |
---|
| 1724 | return NULL; |
---|
| 1725 | |
---|
| 1726 | ret_val->fd = fd; |
---|
[150] | 1727 | ret_val->sk_cache = NULL; |
---|
| 1728 | ret_val->last_message = NULL; |
---|
| 1729 | ret_val->hbins = NULL; |
---|
| 1730 | |
---|
[135] | 1731 | length = REGFI_REGF_SIZE; |
---|
[150] | 1732 | if((regfi_read(fd, file_header, &length)) != 0 || length != REGFI_REGF_SIZE) |
---|
| 1733 | goto fail; |
---|
| 1734 | |
---|
[97] | 1735 | ret_val->checksum = IVAL(file_header, 0x1FC); |
---|
| 1736 | ret_val->computed_checksum = regfi_compute_header_checksum(file_header); |
---|
| 1737 | if (strict && (ret_val->checksum != ret_val->computed_checksum)) |
---|
[150] | 1738 | goto fail; |
---|
[97] | 1739 | |
---|
[135] | 1740 | memcpy(ret_val->magic, file_header, REGFI_REGF_MAGIC_SIZE); |
---|
[150] | 1741 | if(memcmp(ret_val->magic, "regf", REGFI_REGF_MAGIC_SIZE) != 0) |
---|
[97] | 1742 | { |
---|
[150] | 1743 | if(strict) |
---|
| 1744 | goto fail; |
---|
| 1745 | regfi_add_message(ret_val, REGFI_MSG_WARN, "Magic number mismatch " |
---|
| 1746 | "(%.2X %.2X %.2X %.2X) while parsing hive header", |
---|
[151] | 1747 | ret_val->magic[0], ret_val->magic[1], |
---|
[150] | 1748 | ret_val->magic[2], ret_val->magic[3]); |
---|
[97] | 1749 | } |
---|
[151] | 1750 | ret_val->sequence1 = IVAL(file_header, 0x4); |
---|
| 1751 | ret_val->sequence2 = IVAL(file_header, 0x8); |
---|
[97] | 1752 | ret_val->mtime.low = IVAL(file_header, 0xC); |
---|
| 1753 | ret_val->mtime.high = IVAL(file_header, 0x10); |
---|
[151] | 1754 | ret_val->major_version = IVAL(file_header, 0x14); |
---|
| 1755 | ret_val->minor_version = IVAL(file_header, 0x18); |
---|
| 1756 | ret_val->type = IVAL(file_header, 0x1C); |
---|
| 1757 | ret_val->format = IVAL(file_header, 0x20); |
---|
| 1758 | ret_val->root_cell = IVAL(file_header, 0x24); |
---|
[97] | 1759 | ret_val->last_block = IVAL(file_header, 0x28); |
---|
| 1760 | |
---|
[151] | 1761 | ret_val->cluster = IVAL(file_header, 0x2C); |
---|
[97] | 1762 | |
---|
[151] | 1763 | memcpy(ret_val->file_name, file_header+0x30, REGFI_REGF_NAME_SIZE); |
---|
| 1764 | |
---|
| 1765 | /* XXX: Should we add a warning if these uuid parsers fail? Can they? */ |
---|
| 1766 | ret_val->rm_id = winsec_parse_uuid(ret_val, file_header+0x70, 16); |
---|
| 1767 | ret_val->log_id = winsec_parse_uuid(ret_val, file_header+0x80, 16); |
---|
| 1768 | ret_val->flags = IVAL(file_header, 0x90); |
---|
| 1769 | ret_val->tm_id = winsec_parse_uuid(ret_val, file_header+0x94, 16); |
---|
| 1770 | ret_val->guid_signature = IVAL(file_header, 0xa4); |
---|
| 1771 | |
---|
| 1772 | memcpy(ret_val->reserved1, file_header+0xa8, REGFI_REGF_RESERVED1_SIZE); |
---|
| 1773 | memcpy(ret_val->reserved2, file_header+0x200, REGFI_REGF_RESERVED2_SIZE); |
---|
| 1774 | |
---|
| 1775 | ret_val->thaw_tm_id = winsec_parse_uuid(ret_val, file_header+0xFC8, 16); |
---|
| 1776 | ret_val->thaw_rm_id = winsec_parse_uuid(ret_val, file_header+0xFD8, 16); |
---|
| 1777 | ret_val->thaw_log_id = winsec_parse_uuid(ret_val, file_header+0xFE8, 16); |
---|
[152] | 1778 | ret_val->boot_type = IVAL(file_header, 0xFF8); |
---|
| 1779 | ret_val->boot_recover = IVAL(file_header, 0xFFC); |
---|
[151] | 1780 | |
---|
[97] | 1781 | return ret_val; |
---|
[150] | 1782 | |
---|
| 1783 | fail: |
---|
| 1784 | talloc_free(ret_val); |
---|
| 1785 | return NULL; |
---|
[97] | 1786 | } |
---|
| 1787 | |
---|
| 1788 | |
---|
| 1789 | |
---|
[148] | 1790 | /****************************************************************************** |
---|
[97] | 1791 | * Given real file offset, read and parse the hbin at that location |
---|
[110] | 1792 | * along with it's associated cells. |
---|
[148] | 1793 | ******************************************************************************/ |
---|
[135] | 1794 | REGFI_HBIN* regfi_parse_hbin(REGFI_FILE* file, uint32 offset, bool strict) |
---|
[97] | 1795 | { |
---|
[135] | 1796 | REGFI_HBIN *hbin; |
---|
| 1797 | uint8 hbin_header[REGFI_HBIN_HEADER_SIZE]; |
---|
[110] | 1798 | uint32 length; |
---|
[99] | 1799 | |
---|
| 1800 | if(offset >= file->file_length) |
---|
| 1801 | return NULL; |
---|
[97] | 1802 | |
---|
| 1803 | if(lseek(file->fd, offset, SEEK_SET) == -1) |
---|
[137] | 1804 | { |
---|
[138] | 1805 | regfi_add_message(file, REGFI_MSG_ERROR, "Seek failed" |
---|
[137] | 1806 | " while parsing hbin at offset 0x%.8X.", offset); |
---|
[97] | 1807 | return NULL; |
---|
[137] | 1808 | } |
---|
[97] | 1809 | |
---|
[135] | 1810 | length = REGFI_HBIN_HEADER_SIZE; |
---|
[97] | 1811 | if((regfi_read(file->fd, hbin_header, &length) != 0) |
---|
[135] | 1812 | || length != REGFI_HBIN_HEADER_SIZE) |
---|
[97] | 1813 | return NULL; |
---|
| 1814 | |
---|
| 1815 | if(lseek(file->fd, offset, SEEK_SET) == -1) |
---|
[137] | 1816 | { |
---|
[138] | 1817 | regfi_add_message(file, REGFI_MSG_ERROR, "Seek failed" |
---|
[137] | 1818 | " while parsing hbin at offset 0x%.8X.", offset); |
---|
[97] | 1819 | return NULL; |
---|
[137] | 1820 | } |
---|
[97] | 1821 | |
---|
[148] | 1822 | hbin = talloc(NULL, REGFI_HBIN); |
---|
| 1823 | if(hbin == NULL) |
---|
[99] | 1824 | return NULL; |
---|
| 1825 | hbin->file_off = offset; |
---|
| 1826 | |
---|
[97] | 1827 | memcpy(hbin->magic, hbin_header, 4); |
---|
| 1828 | if(strict && (memcmp(hbin->magic, "hbin", 4) != 0)) |
---|
[99] | 1829 | { |
---|
[138] | 1830 | regfi_add_message(file, REGFI_MSG_INFO, "Magic number mismatch " |
---|
| 1831 | "(%.2X %.2X %.2X %.2X) while parsing hbin at offset" |
---|
| 1832 | " 0x%.8X.", hbin->magic[0], hbin->magic[1], |
---|
| 1833 | hbin->magic[2], hbin->magic[3], offset); |
---|
[148] | 1834 | talloc_free(hbin); |
---|
[97] | 1835 | return NULL; |
---|
[99] | 1836 | } |
---|
[97] | 1837 | |
---|
| 1838 | hbin->first_hbin_off = IVAL(hbin_header, 0x4); |
---|
| 1839 | hbin->block_size = IVAL(hbin_header, 0x8); |
---|
| 1840 | /* this should be the same thing as hbin->block_size but just in case */ |
---|
| 1841 | hbin->next_block = IVAL(hbin_header, 0x1C); |
---|
| 1842 | |
---|
| 1843 | |
---|
| 1844 | /* Ensure the block size is a multiple of 0x1000 and doesn't run off |
---|
| 1845 | * the end of the file. |
---|
| 1846 | */ |
---|
[116] | 1847 | /* XXX: This may need to be relaxed for dealing with |
---|
| 1848 | * partial or corrupt files. |
---|
| 1849 | */ |
---|
[97] | 1850 | if((offset + hbin->block_size > file->file_length) |
---|
| 1851 | || (hbin->block_size & 0xFFFFF000) != hbin->block_size) |
---|
[99] | 1852 | { |
---|
[138] | 1853 | regfi_add_message(file, REGFI_MSG_ERROR, "The hbin offset is not aligned" |
---|
[137] | 1854 | " or runs off the end of the file" |
---|
| 1855 | " while parsing hbin at offset 0x%.8X.", offset); |
---|
[148] | 1856 | talloc_free(hbin); |
---|
[97] | 1857 | return NULL; |
---|
[99] | 1858 | } |
---|
[97] | 1859 | |
---|
| 1860 | return hbin; |
---|
| 1861 | } |
---|
| 1862 | |
---|
| 1863 | |
---|
[126] | 1864 | /******************************************************************* |
---|
| 1865 | *******************************************************************/ |
---|
[135] | 1866 | REGFI_NK_REC* regfi_parse_nk(REGFI_FILE* file, uint32 offset, |
---|
[99] | 1867 | uint32 max_size, bool strict) |
---|
| 1868 | { |
---|
| 1869 | uint8 nk_header[REGFI_NK_MIN_LENGTH]; |
---|
[146] | 1870 | const REGFI_HBIN *hbin; |
---|
[135] | 1871 | REGFI_NK_REC* ret_val; |
---|
[131] | 1872 | uint32 length,cell_length; |
---|
| 1873 | uint32 class_offset, class_maxsize; |
---|
[101] | 1874 | bool unalloc = false; |
---|
[99] | 1875 | |
---|
[101] | 1876 | if(!regfi_parse_cell(file->fd, offset, nk_header, REGFI_NK_MIN_LENGTH, |
---|
| 1877 | &cell_length, &unalloc)) |
---|
[137] | 1878 | { |
---|
[138] | 1879 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse cell header" |
---|
[137] | 1880 | " while parsing NK record at offset 0x%.8X.", offset); |
---|
| 1881 | return NULL; |
---|
| 1882 | } |
---|
| 1883 | |
---|
[99] | 1884 | /* A bit of validation before bothering to allocate memory */ |
---|
[101] | 1885 | if((nk_header[0x0] != 'n') || (nk_header[0x1] != 'k')) |
---|
[135] | 1886 | { |
---|
[138] | 1887 | regfi_add_message(file, REGFI_MSG_WARN, "Magic number mismatch in parsing" |
---|
| 1888 | " NK record at offset 0x%.8X.", offset); |
---|
[99] | 1889 | return NULL; |
---|
[135] | 1890 | } |
---|
[99] | 1891 | |
---|
[150] | 1892 | ret_val = talloc(NULL, REGFI_NK_REC); |
---|
[99] | 1893 | if(ret_val == NULL) |
---|
[135] | 1894 | { |
---|
[138] | 1895 | regfi_add_message(file, REGFI_MSG_ERROR, "Failed to allocate memory while" |
---|
[137] | 1896 | " parsing NK record at offset 0x%.8X.", offset); |
---|
[99] | 1897 | return NULL; |
---|
[135] | 1898 | } |
---|
[99] | 1899 | |
---|
[150] | 1900 | ret_val->values = NULL; |
---|
| 1901 | ret_val->subkeys = NULL; |
---|
[99] | 1902 | ret_val->offset = offset; |
---|
[101] | 1903 | ret_val->cell_size = cell_length; |
---|
| 1904 | |
---|
[99] | 1905 | if(ret_val->cell_size > max_size) |
---|
| 1906 | ret_val->cell_size = max_size & 0xFFFFFFF8; |
---|
| 1907 | if((ret_val->cell_size < REGFI_NK_MIN_LENGTH) |
---|
| 1908 | || (strict && ret_val->cell_size != (ret_val->cell_size & 0xFFFFFFF8))) |
---|
| 1909 | { |
---|
[140] | 1910 | regfi_add_message(file, REGFI_MSG_WARN, "A length check failed while" |
---|
[138] | 1911 | " parsing NK record at offset 0x%.8X.", offset); |
---|
[150] | 1912 | talloc_free(ret_val); |
---|
[99] | 1913 | return NULL; |
---|
| 1914 | } |
---|
| 1915 | |
---|
[101] | 1916 | ret_val->magic[0] = nk_header[0x0]; |
---|
| 1917 | ret_val->magic[1] = nk_header[0x1]; |
---|
| 1918 | ret_val->key_type = SVAL(nk_header, 0x2); |
---|
[152] | 1919 | |
---|
| 1920 | if((ret_val->key_type & ~REGFI_NK_KNOWN_FLAGS) != 0) |
---|
[99] | 1921 | { |
---|
[152] | 1922 | regfi_add_message(file, REGFI_MSG_WARN, "Unknown key flags (0x%.4X) while" |
---|
[138] | 1923 | " parsing NK record at offset 0x%.8X.", |
---|
[152] | 1924 | (ret_val->key_type & ~REGFI_NK_KNOWN_FLAGS), offset); |
---|
[99] | 1925 | } |
---|
[101] | 1926 | |
---|
| 1927 | ret_val->mtime.low = IVAL(nk_header, 0x4); |
---|
| 1928 | ret_val->mtime.high = IVAL(nk_header, 0x8); |
---|
[116] | 1929 | /* If the key is unallocated and the MTIME is earlier than Jan 1, 1990 |
---|
| 1930 | * or later than Jan 1, 2290, we consider this a bad key. This helps |
---|
| 1931 | * weed out some false positives during deleted data recovery. |
---|
| 1932 | */ |
---|
| 1933 | if(unalloc |
---|
| 1934 | && ((ret_val->mtime.high < REGFI_MTIME_MIN_HIGH |
---|
| 1935 | && ret_val->mtime.low < REGFI_MTIME_MIN_LOW) |
---|
| 1936 | || (ret_val->mtime.high > REGFI_MTIME_MAX_HIGH |
---|
| 1937 | && ret_val->mtime.low > REGFI_MTIME_MAX_LOW))) |
---|
| 1938 | return NULL; |
---|
| 1939 | |
---|
[101] | 1940 | ret_val->unknown1 = IVAL(nk_header, 0xC); |
---|
| 1941 | ret_val->parent_off = IVAL(nk_header, 0x10); |
---|
| 1942 | ret_val->num_subkeys = IVAL(nk_header, 0x14); |
---|
| 1943 | ret_val->unknown2 = IVAL(nk_header, 0x18); |
---|
| 1944 | ret_val->subkeys_off = IVAL(nk_header, 0x1C); |
---|
| 1945 | ret_val->unknown3 = IVAL(nk_header, 0x20); |
---|
| 1946 | ret_val->num_values = IVAL(nk_header, 0x24); |
---|
| 1947 | ret_val->values_off = IVAL(nk_header, 0x28); |
---|
| 1948 | ret_val->sk_off = IVAL(nk_header, 0x2C); |
---|
| 1949 | ret_val->classname_off = IVAL(nk_header, 0x30); |
---|
[99] | 1950 | |
---|
[101] | 1951 | ret_val->max_bytes_subkeyname = IVAL(nk_header, 0x34); |
---|
| 1952 | ret_val->max_bytes_subkeyclassname = IVAL(nk_header, 0x38); |
---|
| 1953 | ret_val->max_bytes_valuename = IVAL(nk_header, 0x3C); |
---|
| 1954 | ret_val->max_bytes_value = IVAL(nk_header, 0x40); |
---|
| 1955 | ret_val->unk_index = IVAL(nk_header, 0x44); |
---|
[99] | 1956 | |
---|
[101] | 1957 | ret_val->name_length = SVAL(nk_header, 0x48); |
---|
| 1958 | ret_val->classname_length = SVAL(nk_header, 0x4A); |
---|
[99] | 1959 | |
---|
| 1960 | if(ret_val->name_length + REGFI_NK_MIN_LENGTH > ret_val->cell_size) |
---|
[101] | 1961 | { |
---|
| 1962 | if(strict) |
---|
| 1963 | { |
---|
[138] | 1964 | regfi_add_message(file, REGFI_MSG_ERROR, "Contents too large for cell" |
---|
[137] | 1965 | " while parsing NK record at offset 0x%.8X.", offset); |
---|
[150] | 1966 | talloc_free(ret_val); |
---|
[101] | 1967 | return NULL; |
---|
| 1968 | } |
---|
| 1969 | else |
---|
| 1970 | ret_val->name_length = ret_val->cell_size - REGFI_NK_MIN_LENGTH; |
---|
| 1971 | } |
---|
| 1972 | else if (unalloc) |
---|
| 1973 | { /* Truncate cell_size if it's much larger than the apparent total record length. */ |
---|
| 1974 | /* Round up to the next multiple of 8 */ |
---|
| 1975 | length = (ret_val->name_length + REGFI_NK_MIN_LENGTH) & 0xFFFFFFF8; |
---|
| 1976 | if(length < ret_val->name_length + REGFI_NK_MIN_LENGTH) |
---|
| 1977 | length+=8; |
---|
[99] | 1978 | |
---|
[101] | 1979 | /* If cell_size is still greater, truncate. */ |
---|
| 1980 | if(length < ret_val->cell_size) |
---|
| 1981 | ret_val->cell_size = length; |
---|
| 1982 | } |
---|
| 1983 | |
---|
[150] | 1984 | ret_val->keyname = talloc_array(ret_val, char, ret_val->name_length+1); |
---|
[99] | 1985 | if(ret_val->keyname == NULL) |
---|
| 1986 | { |
---|
[150] | 1987 | talloc_free(ret_val); |
---|
[99] | 1988 | return NULL; |
---|
| 1989 | } |
---|
| 1990 | |
---|
| 1991 | /* Don't need to seek, should be at the right offset */ |
---|
| 1992 | length = ret_val->name_length; |
---|
[101] | 1993 | if((regfi_read(file->fd, (uint8*)ret_val->keyname, &length) != 0) |
---|
[99] | 1994 | || length != ret_val->name_length) |
---|
| 1995 | { |
---|
[138] | 1996 | regfi_add_message(file, REGFI_MSG_ERROR, "Failed to read key name" |
---|
[137] | 1997 | " while parsing NK record at offset 0x%.8X.", offset); |
---|
[150] | 1998 | talloc_free(ret_val); |
---|
[99] | 1999 | return NULL; |
---|
| 2000 | } |
---|
| 2001 | ret_val->keyname[ret_val->name_length] = '\0'; |
---|
| 2002 | |
---|
[150] | 2003 | /* XXX: This linking should be moved up to regfi_load_key */ |
---|
[135] | 2004 | if(ret_val->classname_off != REGFI_OFFSET_NONE) |
---|
[126] | 2005 | { |
---|
[131] | 2006 | hbin = regfi_lookup_hbin(file, ret_val->classname_off); |
---|
| 2007 | if(hbin) |
---|
| 2008 | { |
---|
[135] | 2009 | class_offset = ret_val->classname_off+REGFI_REGF_SIZE; |
---|
[131] | 2010 | class_maxsize = hbin->block_size + hbin->file_off - class_offset; |
---|
| 2011 | ret_val->classname |
---|
| 2012 | = regfi_parse_classname(file, class_offset, &ret_val->classname_length, |
---|
| 2013 | class_maxsize, strict); |
---|
| 2014 | } |
---|
| 2015 | else |
---|
[137] | 2016 | { |
---|
[131] | 2017 | ret_val->classname = NULL; |
---|
[138] | 2018 | regfi_add_message(file, REGFI_MSG_WARN, "Could not find hbin for class" |
---|
| 2019 | " name while parsing NK record at offset 0x%.8X.", |
---|
| 2020 | offset); |
---|
[137] | 2021 | } |
---|
[140] | 2022 | |
---|
| 2023 | if(ret_val->classname == NULL) |
---|
| 2024 | { |
---|
| 2025 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse class" |
---|
| 2026 | " name while parsing NK record at offset 0x%.8X.", |
---|
| 2027 | offset); |
---|
| 2028 | } |
---|
[150] | 2029 | else |
---|
| 2030 | talloc_steal(ret_val, ret_val->classname); |
---|
[126] | 2031 | } |
---|
[138] | 2032 | |
---|
[126] | 2033 | return ret_val; |
---|
| 2034 | } |
---|
| 2035 | |
---|
| 2036 | |
---|
[135] | 2037 | char* regfi_parse_classname(REGFI_FILE* file, uint32 offset, |
---|
[131] | 2038 | uint16* name_length, uint32 max_size, bool strict) |
---|
[126] | 2039 | { |
---|
| 2040 | char* ret_val = NULL; |
---|
| 2041 | uint32 length; |
---|
| 2042 | uint32 cell_length; |
---|
| 2043 | bool unalloc = false; |
---|
| 2044 | |
---|
[135] | 2045 | if(*name_length > 0 && offset != REGFI_OFFSET_NONE |
---|
[126] | 2046 | && offset == (offset & 0xFFFFFFF8)) |
---|
[131] | 2047 | { |
---|
[126] | 2048 | if(!regfi_parse_cell(file->fd, offset, NULL, 0, &cell_length, &unalloc)) |
---|
[137] | 2049 | { |
---|
[138] | 2050 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse cell header" |
---|
[137] | 2051 | " while parsing class name at offset 0x%.8X.", offset); |
---|
[126] | 2052 | return NULL; |
---|
[137] | 2053 | } |
---|
[126] | 2054 | |
---|
[131] | 2055 | if((cell_length & 0xFFFFFFF8) != cell_length) |
---|
[137] | 2056 | { |
---|
[138] | 2057 | regfi_add_message(file, REGFI_MSG_ERROR, "Cell length not a multiple of 8" |
---|
[137] | 2058 | " while parsing class name at offset 0x%.8X.", offset); |
---|
[131] | 2059 | return NULL; |
---|
[137] | 2060 | } |
---|
| 2061 | |
---|
[131] | 2062 | if(cell_length > max_size) |
---|
[125] | 2063 | { |
---|
[138] | 2064 | regfi_add_message(file, REGFI_MSG_WARN, "Cell stretches past hbin " |
---|
| 2065 | "boundary while parsing class name at offset 0x%.8X.", |
---|
| 2066 | offset); |
---|
[126] | 2067 | if(strict) |
---|
| 2068 | return NULL; |
---|
[131] | 2069 | cell_length = max_size; |
---|
[126] | 2070 | } |
---|
[131] | 2071 | |
---|
| 2072 | if((cell_length - 4) < *name_length) |
---|
| 2073 | { |
---|
[138] | 2074 | regfi_add_message(file, REGFI_MSG_WARN, "Class name is larger than" |
---|
| 2075 | " cell_length while parsing class name at offset" |
---|
| 2076 | " 0x%.8X.", offset); |
---|
[131] | 2077 | if(strict) |
---|
| 2078 | return NULL; |
---|
| 2079 | *name_length = cell_length - 4; |
---|
| 2080 | } |
---|
[126] | 2081 | |
---|
[150] | 2082 | ret_val = talloc_array(NULL, char, *name_length); |
---|
[126] | 2083 | if(ret_val != NULL) |
---|
| 2084 | { |
---|
| 2085 | length = *name_length; |
---|
| 2086 | if((regfi_read(file->fd, (uint8*)ret_val, &length) != 0) |
---|
| 2087 | || length != *name_length) |
---|
[125] | 2088 | { |
---|
[138] | 2089 | regfi_add_message(file, REGFI_MSG_ERROR, "Could not read class name" |
---|
[137] | 2090 | " while parsing class name at offset 0x%.8X.", offset); |
---|
[150] | 2091 | talloc_free(ret_val); |
---|
[126] | 2092 | return NULL; |
---|
[125] | 2093 | } |
---|
| 2094 | } |
---|
| 2095 | } |
---|
| 2096 | |
---|
[99] | 2097 | return ret_val; |
---|
| 2098 | } |
---|
| 2099 | |
---|
| 2100 | |
---|
[152] | 2101 | /****************************************************************************** |
---|
| 2102 | *******************************************************************************/ |
---|
[135] | 2103 | REGFI_VK_REC* regfi_parse_vk(REGFI_FILE* file, uint32 offset, |
---|
[145] | 2104 | uint32 max_size, bool strict) |
---|
[97] | 2105 | { |
---|
[135] | 2106 | REGFI_VK_REC* ret_val; |
---|
[101] | 2107 | uint8 vk_header[REGFI_VK_MIN_LENGTH]; |
---|
| 2108 | uint32 raw_data_size, length, cell_length; |
---|
| 2109 | bool unalloc = false; |
---|
[97] | 2110 | |
---|
[101] | 2111 | if(!regfi_parse_cell(file->fd, offset, vk_header, REGFI_VK_MIN_LENGTH, |
---|
| 2112 | &cell_length, &unalloc)) |
---|
[137] | 2113 | { |
---|
[138] | 2114 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse cell header" |
---|
[137] | 2115 | " while parsing VK record at offset 0x%.8X.", offset); |
---|
[101] | 2116 | return NULL; |
---|
[137] | 2117 | } |
---|
[111] | 2118 | |
---|
[150] | 2119 | ret_val = talloc(NULL, REGFI_VK_REC); |
---|
[101] | 2120 | if(ret_val == NULL) |
---|
| 2121 | return NULL; |
---|
| 2122 | |
---|
| 2123 | ret_val->offset = offset; |
---|
| 2124 | ret_val->cell_size = cell_length; |
---|
[150] | 2125 | ret_val->data = NULL; |
---|
| 2126 | ret_val->valuename = NULL; |
---|
| 2127 | |
---|
[101] | 2128 | if(ret_val->cell_size > max_size) |
---|
| 2129 | ret_val->cell_size = max_size & 0xFFFFFFF8; |
---|
| 2130 | if((ret_val->cell_size < REGFI_VK_MIN_LENGTH) |
---|
[111] | 2131 | || ret_val->cell_size != (ret_val->cell_size & 0xFFFFFFF8)) |
---|
[97] | 2132 | { |
---|
[138] | 2133 | regfi_add_message(file, REGFI_MSG_WARN, "Invalid cell size encountered" |
---|
[137] | 2134 | " while parsing VK record at offset 0x%.8X.", offset); |
---|
[150] | 2135 | talloc_free(ret_val); |
---|
[101] | 2136 | return NULL; |
---|
| 2137 | } |
---|
[97] | 2138 | |
---|
[101] | 2139 | ret_val->magic[0] = vk_header[0x0]; |
---|
| 2140 | ret_val->magic[1] = vk_header[0x1]; |
---|
| 2141 | if((ret_val->magic[0] != 'v') || (ret_val->magic[1] != 'k')) |
---|
| 2142 | { |
---|
[124] | 2143 | /* XXX: This does not account for deleted keys under Win2K which |
---|
| 2144 | * often have this (and the name length) overwritten with |
---|
| 2145 | * 0xFFFF. |
---|
| 2146 | */ |
---|
[138] | 2147 | regfi_add_message(file, REGFI_MSG_WARN, "Magic number mismatch" |
---|
[137] | 2148 | " while parsing VK record at offset 0x%.8X.", offset); |
---|
[150] | 2149 | talloc_free(ret_val); |
---|
[101] | 2150 | return NULL; |
---|
| 2151 | } |
---|
| 2152 | |
---|
| 2153 | ret_val->name_length = SVAL(vk_header, 0x2); |
---|
| 2154 | raw_data_size = IVAL(vk_header, 0x4); |
---|
[135] | 2155 | ret_val->data_size = raw_data_size & ~REGFI_VK_DATA_IN_OFFSET; |
---|
| 2156 | ret_val->data_in_offset = (bool)(raw_data_size & REGFI_VK_DATA_IN_OFFSET); |
---|
[101] | 2157 | ret_val->data_off = IVAL(vk_header, 0x8); |
---|
| 2158 | ret_val->type = IVAL(vk_header, 0xC); |
---|
| 2159 | ret_val->flag = SVAL(vk_header, 0x10); |
---|
| 2160 | ret_val->unknown1 = SVAL(vk_header, 0x12); |
---|
| 2161 | |
---|
[135] | 2162 | if(ret_val->flag & REGFI_VK_FLAG_NAME_PRESENT) |
---|
[101] | 2163 | { |
---|
[113] | 2164 | if(ret_val->name_length + REGFI_VK_MIN_LENGTH + 4 > ret_val->cell_size) |
---|
[101] | 2165 | { |
---|
[138] | 2166 | regfi_add_message(file, REGFI_MSG_WARN, "Name too long for remaining cell" |
---|
| 2167 | " space while parsing VK record at offset 0x%.8X.", |
---|
| 2168 | offset); |
---|
[101] | 2169 | if(strict) |
---|
| 2170 | { |
---|
[150] | 2171 | talloc_free(ret_val); |
---|
[101] | 2172 | return NULL; |
---|
| 2173 | } |
---|
| 2174 | else |
---|
[113] | 2175 | ret_val->name_length = ret_val->cell_size - REGFI_VK_MIN_LENGTH - 4; |
---|
[101] | 2176 | } |
---|
| 2177 | |
---|
| 2178 | /* Round up to the next multiple of 8 */ |
---|
[113] | 2179 | cell_length = (ret_val->name_length + REGFI_VK_MIN_LENGTH + 4) & 0xFFFFFFF8; |
---|
| 2180 | if(cell_length < ret_val->name_length + REGFI_VK_MIN_LENGTH + 4) |
---|
| 2181 | cell_length+=8; |
---|
[101] | 2182 | |
---|
[150] | 2183 | ret_val->valuename = talloc_array(ret_val, char, ret_val->name_length+1); |
---|
[101] | 2184 | if(ret_val->valuename == NULL) |
---|
| 2185 | { |
---|
[150] | 2186 | talloc_free(ret_val); |
---|
[101] | 2187 | return NULL; |
---|
| 2188 | } |
---|
[113] | 2189 | |
---|
[101] | 2190 | length = ret_val->name_length; |
---|
| 2191 | if((regfi_read(file->fd, (uint8*)ret_val->valuename, &length) != 0) |
---|
| 2192 | || length != ret_val->name_length) |
---|
| 2193 | { |
---|
[138] | 2194 | regfi_add_message(file, REGFI_MSG_ERROR, "Could not read value name" |
---|
[137] | 2195 | " while parsing VK record at offset 0x%.8X.", offset); |
---|
[150] | 2196 | talloc_free(ret_val); |
---|
[101] | 2197 | return NULL; |
---|
| 2198 | } |
---|
| 2199 | ret_val->valuename[ret_val->name_length] = '\0'; |
---|
[133] | 2200 | |
---|
[101] | 2201 | } |
---|
| 2202 | else |
---|
[113] | 2203 | cell_length = REGFI_VK_MIN_LENGTH + 4; |
---|
[101] | 2204 | |
---|
| 2205 | if(unalloc) |
---|
| 2206 | { |
---|
| 2207 | /* If cell_size is still greater, truncate. */ |
---|
[113] | 2208 | if(cell_length < ret_val->cell_size) |
---|
| 2209 | ret_val->cell_size = cell_length; |
---|
[101] | 2210 | } |
---|
| 2211 | |
---|
| 2212 | return ret_val; |
---|
[97] | 2213 | } |
---|
[101] | 2214 | |
---|
| 2215 | |
---|
[152] | 2216 | /****************************************************************************** |
---|
| 2217 | *******************************************************************************/ |
---|
| 2218 | REGFI_BUFFER regfi_load_data(REGFI_FILE* file, |
---|
| 2219 | uint32 data_type, uint32 offset, |
---|
| 2220 | uint32 length, uint32 max_size, |
---|
| 2221 | bool data_in_offset, bool strict) |
---|
[101] | 2222 | { |
---|
[151] | 2223 | REGFI_BUFFER ret_val; |
---|
[101] | 2224 | uint32 read_length, cell_length; |
---|
[102] | 2225 | uint8 i; |
---|
[101] | 2226 | bool unalloc; |
---|
[151] | 2227 | |
---|
[137] | 2228 | /* The data is typically stored in the offset if the size <= 4 */ |
---|
[145] | 2229 | if(data_in_offset) |
---|
[101] | 2230 | { |
---|
| 2231 | if(length > 4) |
---|
[137] | 2232 | { |
---|
[138] | 2233 | regfi_add_message(file, REGFI_MSG_ERROR, "Data in offset but length > 4" |
---|
[137] | 2234 | " while parsing data record at offset 0x%.8X.", |
---|
| 2235 | offset); |
---|
[151] | 2236 | goto fail; |
---|
[137] | 2237 | } |
---|
[101] | 2238 | |
---|
[151] | 2239 | if((ret_val.buf = talloc_array(NULL, uint8_t, length)) == NULL) |
---|
| 2240 | goto fail; |
---|
| 2241 | ret_val.len = length; |
---|
[102] | 2242 | |
---|
| 2243 | for(i = 0; i < length; i++) |
---|
[151] | 2244 | ret_val.buf[i] = (uint8)((offset >> i*8) & 0xFF); |
---|
[101] | 2245 | } |
---|
| 2246 | else |
---|
| 2247 | { |
---|
| 2248 | if(!regfi_parse_cell(file->fd, offset, NULL, 0, |
---|
| 2249 | &cell_length, &unalloc)) |
---|
[137] | 2250 | { |
---|
[138] | 2251 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse cell while" |
---|
[137] | 2252 | " parsing data record at offset 0x%.8X.", offset); |
---|
[151] | 2253 | goto fail; |
---|
[137] | 2254 | } |
---|
[111] | 2255 | |
---|
| 2256 | if((cell_length & 0xFFFFFFF8) != cell_length) |
---|
[137] | 2257 | { |
---|
[138] | 2258 | regfi_add_message(file, REGFI_MSG_WARN, "Cell length not multiple of 8" |
---|
[137] | 2259 | " while parsing data record at offset 0x%.8X.", |
---|
| 2260 | offset); |
---|
[151] | 2261 | goto fail; |
---|
[137] | 2262 | } |
---|
[101] | 2263 | |
---|
[131] | 2264 | if(cell_length > max_size) |
---|
| 2265 | { |
---|
[145] | 2266 | regfi_add_message(file, REGFI_MSG_WARN, "Cell extends past HBIN boundary" |
---|
| 2267 | " while parsing data record at offset 0x%.8X.", |
---|
[137] | 2268 | offset); |
---|
[131] | 2269 | if(strict) |
---|
[151] | 2270 | goto fail; |
---|
[131] | 2271 | else |
---|
| 2272 | cell_length = max_size; |
---|
| 2273 | } |
---|
| 2274 | |
---|
[101] | 2275 | if(cell_length - 4 < length) |
---|
| 2276 | { |
---|
[155] | 2277 | /* XXX: All big data records thus far have been 16 bytes long. |
---|
| 2278 | * Should we check for this precise size instead of just |
---|
| 2279 | * relying upon the above check? |
---|
| 2280 | */ |
---|
[152] | 2281 | if (file->major_version >= 1 && file->minor_version >= 5) |
---|
| 2282 | { |
---|
| 2283 | /* Attempt to parse a big data record */ |
---|
| 2284 | return regfi_load_big_data(file, offset, length, cell_length, strict); |
---|
| 2285 | } |
---|
[101] | 2286 | else |
---|
[152] | 2287 | { |
---|
| 2288 | regfi_add_message(file, REGFI_MSG_WARN, "Data length (0x%.8X) larger than" |
---|
| 2289 | " remaining cell length (0x%.8X)" |
---|
| 2290 | " while parsing data record at offset 0x%.8X.", |
---|
| 2291 | length, cell_length - 4, offset); |
---|
| 2292 | if(strict) |
---|
| 2293 | goto fail; |
---|
| 2294 | else |
---|
| 2295 | length = cell_length - 4; |
---|
| 2296 | } |
---|
[101] | 2297 | } |
---|
| 2298 | |
---|
[151] | 2299 | if((ret_val.buf = talloc_array(NULL, uint8_t, length)) == NULL) |
---|
| 2300 | goto fail; |
---|
| 2301 | ret_val.len = length; |
---|
[101] | 2302 | |
---|
| 2303 | read_length = length; |
---|
[151] | 2304 | if((regfi_read(file->fd, ret_val.buf, &read_length) != 0) |
---|
[101] | 2305 | || read_length != length) |
---|
| 2306 | { |
---|
[138] | 2307 | regfi_add_message(file, REGFI_MSG_ERROR, "Could not read data block while" |
---|
[137] | 2308 | " parsing data record at offset 0x%.8X.", offset); |
---|
[151] | 2309 | talloc_free(ret_val.buf); |
---|
| 2310 | goto fail; |
---|
[101] | 2311 | } |
---|
| 2312 | } |
---|
| 2313 | |
---|
| 2314 | return ret_val; |
---|
[151] | 2315 | |
---|
| 2316 | fail: |
---|
| 2317 | ret_val.buf = NULL; |
---|
| 2318 | ret_val.len = 0; |
---|
| 2319 | return ret_val; |
---|
[101] | 2320 | } |
---|
[110] | 2321 | |
---|
| 2322 | |
---|
[152] | 2323 | /****************************************************************************** |
---|
| 2324 | *******************************************************************************/ |
---|
| 2325 | REGFI_BUFFER regfi_load_big_data(REGFI_FILE* file, |
---|
| 2326 | uint32 offset, uint32 data_length, |
---|
| 2327 | uint32 cell_length, bool strict) |
---|
| 2328 | { |
---|
| 2329 | REGFI_BUFFER ret_val; |
---|
| 2330 | uint16 num_chunks, i; |
---|
| 2331 | uint32 indirect_offset, indirect_length, chunk_length, chunk_offset; |
---|
| 2332 | uint32 read_length, data_left; |
---|
| 2333 | bool unalloc; |
---|
| 2334 | uint32* indirect_ptrs; |
---|
| 2335 | uint8* big_data_cell = (uint8*)malloc(cell_length*sizeof(uint8)); |
---|
| 2336 | if(big_data_cell == NULL) |
---|
| 2337 | goto fail; |
---|
| 2338 | |
---|
| 2339 | if(!regfi_parse_cell(file->fd, offset, big_data_cell, cell_length-4, |
---|
| 2340 | &cell_length, &unalloc)) |
---|
| 2341 | { |
---|
| 2342 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse cell while" |
---|
| 2343 | " parsing big data record at offset 0x%.8X.", offset); |
---|
| 2344 | free(big_data_cell); |
---|
| 2345 | goto fail; |
---|
| 2346 | } |
---|
| 2347 | |
---|
| 2348 | if((big_data_cell[0] != 'd') || (big_data_cell[1] != 'b')) |
---|
| 2349 | { |
---|
| 2350 | regfi_add_message(file, REGFI_MSG_WARN, "Unknown magic number" |
---|
| 2351 | " (0x%.2X, 0x%.2X) encountered while parsing" |
---|
| 2352 | " big data record at offset 0x%.8X.", |
---|
| 2353 | big_data_cell[0], big_data_cell[1], offset); |
---|
| 2354 | free(big_data_cell); |
---|
| 2355 | goto fail; |
---|
| 2356 | } |
---|
| 2357 | num_chunks = SVAL(big_data_cell, 0x2); |
---|
| 2358 | /* XXX: Should check sanity of pointers here and in the indirect |
---|
| 2359 | * block. At least ensure they are a multiple of 8. |
---|
| 2360 | */ |
---|
| 2361 | indirect_offset = IVAL(big_data_cell, 0x4) + REGFI_REGF_SIZE; |
---|
| 2362 | free(big_data_cell); |
---|
| 2363 | |
---|
| 2364 | indirect_ptrs = (uint32*)malloc(num_chunks*sizeof(uint32)); |
---|
| 2365 | if(indirect_ptrs == NULL) |
---|
| 2366 | goto fail; |
---|
| 2367 | |
---|
| 2368 | if(!regfi_parse_cell(file->fd, indirect_offset, (uint8*)indirect_ptrs, |
---|
| 2369 | num_chunks*sizeof(uint32), |
---|
| 2370 | &indirect_length, &unalloc)) |
---|
| 2371 | { |
---|
| 2372 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse cell while" |
---|
| 2373 | " parsing big data indirect record at offset 0x%.8X.", |
---|
| 2374 | offset); |
---|
| 2375 | free(indirect_ptrs); |
---|
| 2376 | goto fail; |
---|
| 2377 | } |
---|
| 2378 | |
---|
| 2379 | if((ret_val.buf = talloc_array(NULL, uint8_t, data_length)) == NULL) |
---|
| 2380 | { |
---|
| 2381 | free(indirect_ptrs); |
---|
| 2382 | goto fail; |
---|
| 2383 | } |
---|
| 2384 | data_left = data_length; |
---|
| 2385 | |
---|
| 2386 | for(i=0; (i<num_chunks) && (data_left>0); i++) |
---|
| 2387 | { |
---|
| 2388 | /* Fix endianness of pointer and convert to physical offset */ |
---|
| 2389 | chunk_offset = IVAL(indirect_ptrs, i*4) + REGFI_REGF_SIZE; |
---|
| 2390 | if(!regfi_parse_cell(file->fd, chunk_offset, NULL, 0, |
---|
| 2391 | &chunk_length, &unalloc)) |
---|
| 2392 | { |
---|
| 2393 | regfi_add_message(file, REGFI_MSG_WARN, "Could not parse cell while" |
---|
| 2394 | " parsing big data chunk at offset 0x%.8X.", |
---|
| 2395 | chunk_offset); |
---|
| 2396 | if(strict) |
---|
| 2397 | goto chunk_fail; |
---|
| 2398 | else |
---|
| 2399 | break; |
---|
| 2400 | } |
---|
| 2401 | |
---|
[154] | 2402 | /* XXX: This should be "chunk_length-4" to account for the 4 byte cell |
---|
| 2403 | * length. However, it has been observed that some (all?) chunks |
---|
| 2404 | * have an additional 4 bytes of 0 at the end of their cells that |
---|
| 2405 | * isn't part of the data, so we're trimming that off too. |
---|
| 2406 | */ |
---|
| 2407 | if(chunk_length-8 >= data_left) |
---|
[152] | 2408 | read_length = data_left; |
---|
| 2409 | else |
---|
[154] | 2410 | read_length = chunk_length-8; |
---|
[152] | 2411 | |
---|
| 2412 | if(regfi_read(file->fd, ret_val.buf+(data_length-data_left), |
---|
| 2413 | &read_length) != 0) |
---|
| 2414 | { |
---|
| 2415 | regfi_add_message(file, REGFI_MSG_WARN, "Could not read data chunk while" |
---|
| 2416 | " constructing big data at offset 0x%.8X.", |
---|
| 2417 | chunk_offset); |
---|
| 2418 | if(strict) |
---|
| 2419 | goto chunk_fail; |
---|
| 2420 | else |
---|
| 2421 | break; |
---|
| 2422 | } |
---|
| 2423 | |
---|
| 2424 | data_left -= read_length; |
---|
| 2425 | } |
---|
| 2426 | free(indirect_ptrs); |
---|
| 2427 | ret_val.len = data_length-data_left; |
---|
[154] | 2428 | |
---|
[152] | 2429 | return ret_val; |
---|
| 2430 | |
---|
| 2431 | chunk_fail: |
---|
| 2432 | free(indirect_ptrs); |
---|
| 2433 | talloc_free(ret_val.buf); |
---|
| 2434 | fail: |
---|
| 2435 | ret_val.buf = NULL; |
---|
| 2436 | ret_val.len = 0; |
---|
| 2437 | return ret_val; |
---|
| 2438 | } |
---|
| 2439 | |
---|
| 2440 | |
---|
[135] | 2441 | range_list* regfi_parse_unalloc_cells(REGFI_FILE* file) |
---|
[110] | 2442 | { |
---|
| 2443 | range_list* ret_val; |
---|
[135] | 2444 | REGFI_HBIN* hbin; |
---|
[110] | 2445 | const range_list_element* hbins_elem; |
---|
| 2446 | uint32 i, num_hbins, curr_off, cell_len; |
---|
| 2447 | bool is_unalloc; |
---|
| 2448 | |
---|
| 2449 | ret_val = range_list_new(); |
---|
| 2450 | if(ret_val == NULL) |
---|
| 2451 | return NULL; |
---|
| 2452 | |
---|
| 2453 | num_hbins = range_list_size(file->hbins); |
---|
| 2454 | for(i=0; i<num_hbins; i++) |
---|
| 2455 | { |
---|
| 2456 | hbins_elem = range_list_get(file->hbins, i); |
---|
| 2457 | if(hbins_elem == NULL) |
---|
| 2458 | break; |
---|
[135] | 2459 | hbin = (REGFI_HBIN*)hbins_elem->data; |
---|
[110] | 2460 | |
---|
[135] | 2461 | curr_off = REGFI_HBIN_HEADER_SIZE; |
---|
[110] | 2462 | while(curr_off < hbin->block_size) |
---|
| 2463 | { |
---|
| 2464 | if(!regfi_parse_cell(file->fd, hbin->file_off+curr_off, NULL, 0, |
---|
| 2465 | &cell_len, &is_unalloc)) |
---|
| 2466 | break; |
---|
| 2467 | |
---|
[113] | 2468 | if((cell_len == 0) || ((cell_len & 0xFFFFFFF8) != cell_len)) |
---|
[140] | 2469 | { |
---|
| 2470 | regfi_add_message(file, REGFI_MSG_ERROR, "Bad cell length encountered" |
---|
| 2471 | " while parsing unallocated cells at offset 0x%.8X.", |
---|
| 2472 | hbin->file_off+curr_off); |
---|
[110] | 2473 | break; |
---|
[140] | 2474 | } |
---|
| 2475 | |
---|
[110] | 2476 | /* for some reason the record_size of the last record in |
---|
| 2477 | an hbin block can extend past the end of the block |
---|
| 2478 | even though the record fits within the remaining |
---|
| 2479 | space....aaarrrgggghhhhhh */ |
---|
| 2480 | if(curr_off + cell_len >= hbin->block_size) |
---|
| 2481 | cell_len = hbin->block_size - curr_off; |
---|
| 2482 | |
---|
| 2483 | if(is_unalloc) |
---|
| 2484 | range_list_add(ret_val, hbin->file_off+curr_off, |
---|
| 2485 | cell_len, NULL); |
---|
| 2486 | |
---|
| 2487 | curr_off = curr_off+cell_len; |
---|
| 2488 | } |
---|
| 2489 | } |
---|
| 2490 | |
---|
| 2491 | return ret_val; |
---|
| 2492 | } |
---|