Mercurial > dropbear
annotate libtomcrypt/demos/hashsum.c @ 1695:93e738ef0d9d
Avoid oss-fuzz $SANITIZER causing wrong build
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22608
author | Matt Johnston <matt@ucc.asn.au> |
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date | Wed, 27 May 2020 20:33:45 +0800 |
parents | 6dba84798cd5 |
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
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2 * |
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3 * LibTomCrypt is a library that provides various cryptographic |
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4 * algorithms in a highly modular and flexible manner. |
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5 * |
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6 * The library is free for all purposes without any express |
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7 * guarantee it works. |
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8 */ |
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9 |
285
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10 /* |
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11 * Written by Daniel Richards <[email protected]> 6/7/2002 |
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12 * hash.c: This app uses libtomcrypt to hash either stdin or a file |
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13 * This file is Public Domain. No rights are reserved. |
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14 * Compile with 'gcc hashsum.c -o hashsum -ltomcrypt' |
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15 * This example isn't really big enough to warrent splitting into |
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16 * more functions ;) |
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17 */ |
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18 |
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19 #include <tomcrypt.h> |
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20 |
1471
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21 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L |
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22 #include <libgen.h> |
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23 #else |
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24 #define basename(x) x |
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25 #endif |
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26 |
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27 #if !defined(PATH_MAX) && defined(_MSC_VER) |
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28 #include <windows.h> |
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29 #define PATH_MAX MAX_PATH |
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30 #endif |
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31 |
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32 /* thanks http://stackoverflow.com/a/8198009 */ |
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33 #define _base(x) ((x >= '0' && x <= '9') ? '0' : \ |
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34 (x >= 'a' && x <= 'f') ? 'a' - 10 : \ |
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35 (x >= 'A' && x <= 'F') ? 'A' - 10 : \ |
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36 '\255') |
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37 #define HEXOF(x) (x - _base(x)) |
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38 |
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39 static char* hashsum; |
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40 |
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41 static void cleanup(void) |
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42 { |
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43 free(hashsum); |
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44 } |
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45 |
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46 static void die(int status) |
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47 { |
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48 unsigned long w, x; |
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49 FILE* o = status == EXIT_SUCCESS ? stdout : stderr; |
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50 fprintf(o, "usage: %s -a algorithm [-c] [file...]\n\n", hashsum); |
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51 fprintf(o, "\t-c\tCheck the hash(es) of the file(s) written in [file].\n"); |
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52 fprintf(o, "\t\t(-a not required)\n"); |
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53 fprintf(o, "\nAlgorithms:\n\t"); |
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54 w = 0; |
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55 for (x = 0; hash_descriptor[x].name != NULL; x++) { |
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56 w += fprintf(o, "%-14s", hash_descriptor[x].name); |
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57 if (w >= 70) { |
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58 fprintf(o, "\n\t"); |
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59 w = 0; |
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60 } |
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61 } |
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62 if (w != 0) fprintf(o, "\n"); |
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63 exit(status); |
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64 } |
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65 |
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66 static void printf_hex(unsigned char* hash_buffer, unsigned long w) |
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67 { |
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68 unsigned long x; |
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69 for (x = 0; x < w; x++) { |
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70 printf("%02x",hash_buffer[x]); |
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71 } |
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72 } |
285
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73 |
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74 static void check_file(int argn, int argc, char **argv) |
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75 { |
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76 int err, failed, invalid; |
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77 unsigned char is_buffer[MAXBLOCKSIZE], should_buffer[MAXBLOCKSIZE]; |
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78 char buf[PATH_MAX + (MAXBLOCKSIZE * 3)]; |
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79 /* iterate through all files */ |
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80 while(argn < argc) { |
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81 char* s; |
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82 FILE* f = fopen(argv[argn], "rb"); |
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83 if(f == NULL) { |
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84 int n = snprintf(buf, sizeof(buf), "%s: %s", hashsum, argv[argn]); |
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85 if (n > 0 && n < (int)sizeof(buf)) |
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86 perror(buf); |
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87 else |
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88 perror(argv[argn]); |
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89 exit(EXIT_FAILURE); |
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90 } |
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91 failed = 0; |
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92 invalid = 0; |
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93 /* read the file line by line */ |
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94 while((s = fgets(buf, sizeof(buf), f)) != NULL) |
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95 { |
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96 int tries, n; |
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97 unsigned long hash_len, w, x; |
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98 char* space = strstr(s, " "); |
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99 |
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100 /* skip lines with comments */ |
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101 if (buf[0] == '#') continue; |
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102 |
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103 if (space == NULL) { |
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104 fprintf(stderr, "%s: no properly formatted checksum lines found\n", hashsum); |
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105 goto ERR; |
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106 } |
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107 |
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108 hash_len = space - s; |
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109 hash_len /= 2; |
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110 |
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111 if (hash_len > sizeof(should_buffer)) { |
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112 fprintf(stderr, "%s: hash too long\n", hashsum); |
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113 goto ERR; |
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114 } |
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115 |
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116 /* convert the hex-string back to binary */ |
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117 for (x = 0; x < hash_len; ++x) { |
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118 should_buffer[x] = HEXOF(s[x*2]) << 4 | HEXOF(s[x*2 + 1]); |
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119 } |
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120 |
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121 space++; |
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122 if (*space != '*') { |
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123 fprintf(stderr, "%s: unsupported input mode '%c'\n", hashsum, *space); |
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124 goto ERR; |
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125 } |
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126 space++; |
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127 |
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128 for (n = 0; n < (buf + sizeof(buf)) - space; ++n) { |
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129 if(iscntrl((int)space[n])) { |
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130 space[n] = '\0'; |
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131 break; |
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132 } |
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133 } |
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134 |
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135 /* try all hash algorithms that have the appropriate hash size */ |
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136 tries = 0; |
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137 for (x = 0; hash_descriptor[x].name != NULL; ++x) { |
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138 if (hash_descriptor[x].hashsize == hash_len) { |
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139 tries++; |
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140 w = sizeof(is_buffer); |
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141 if ((err = hash_file(x, space, is_buffer, &w)) != CRYPT_OK) { |
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142 fprintf(stderr, "%s: File hash error: %s: %s\n", hashsum, space, error_to_string(err)); |
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143 ERR: |
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144 fclose(f); |
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145 exit(EXIT_FAILURE); |
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146 } |
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147 if(XMEMCMP(should_buffer, is_buffer, w) == 0) { |
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148 printf("%s: OK\n", space); |
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149 break; |
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150 } |
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151 } |
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152 } /* for */ |
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153 if (hash_descriptor[x].name == NULL) { |
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154 if(tries > 0) { |
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155 printf("%s: FAILED\n", space); |
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156 failed++; |
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157 } |
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158 else { |
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159 invalid++; |
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160 } |
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161 } |
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162 } /* while */ |
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163 fclose(f); |
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164 if(invalid) { |
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165 fprintf(stderr, "%s: WARNING: %d %s is improperly formatted\n", hashsum, invalid, invalid > 1?"lines":"line"); |
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166 } |
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167 if(failed) { |
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168 fprintf(stderr, "%s: WARNING: %d computed %s did NOT match\n", hashsum, failed, failed > 1?"checksums":"checksum"); |
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169 } |
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170 argn++; |
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171 } |
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172 exit(EXIT_SUCCESS); |
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173 } |
285
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174 |
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175 int main(int argc, char **argv) |
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176 { |
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177 int idxs[TAB_SIZE], idx, check, y, z, err, argn; |
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178 unsigned long w, x; |
285
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179 unsigned char hash_buffer[MAXBLOCKSIZE]; |
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180 |
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181 hashsum = strdup(basename(argv[0])); |
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182 atexit(cleanup); |
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183 |
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184 /* You need to register algorithms before using them */ |
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185 register_all_ciphers(); |
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186 register_all_hashes(); |
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187 if (argc > 1 && (strcmp("-h", argv[1]) == 0 || strcmp("--help", argv[1]) == 0)) { |
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188 die(EXIT_SUCCESS); |
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189 } |
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190 if (argc < 3) { |
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191 die(EXIT_FAILURE); |
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192 } |
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193 |
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194 for (x = 0; x < sizeof(idxs)/sizeof(idxs[0]); ++x) { |
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195 idxs[x] = -2; |
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196 } |
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197 argn = 1; |
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198 check = 0; |
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199 idx = 0; |
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200 |
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201 while(argn < argc){ |
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202 if(strcmp("-a", argv[argn]) == 0) { |
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203 argn++; |
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204 if(argn < argc) { |
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205 idxs[idx] = find_hash(argv[argn]); |
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206 if (idxs[idx] == -1) { |
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207 struct { |
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208 const char* is; |
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209 const char* should; |
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210 } shasum_compat[] = |
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211 { |
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212 #ifdef LTC_SHA1 |
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213 { "1", sha1_desc.name }, |
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214 #endif |
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215 #ifdef LTC_SHA224 |
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216 { "224", sha224_desc.name }, |
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217 #endif |
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218 #ifdef LTC_SHA256 |
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219 { "256", sha256_desc.name }, |
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220 #endif |
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221 #ifdef LTC_SHA384 |
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222 { "384", sha384_desc.name }, |
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223 #endif |
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224 #ifdef LTC_SHA512 |
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225 { "512", sha512_desc.name }, |
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226 #endif |
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227 #ifdef LTC_SHA512_224 |
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228 { "512224", sha512_224_desc.name }, |
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229 #endif |
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230 #ifdef LTC_SHA512_256 |
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231 { "512256", sha512_256_desc.name }, |
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232 #endif |
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233 { NULL, NULL } |
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234 }; |
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235 for (x = 0; shasum_compat[x].is != NULL; ++x) { |
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236 if(XSTRCMP(shasum_compat[x].is, argv[argn]) == 0) { |
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237 idxs[idx] = find_hash(shasum_compat[x].should); |
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238 break; |
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239 } |
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240 } |
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241 } |
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242 if (idxs[idx] == -1) { |
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243 fprintf(stderr, "%s: Unrecognized algorithm\n", hashsum); |
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244 die(EXIT_FAILURE); |
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245 } |
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246 idx++; |
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247 if ((size_t)idx >= sizeof(idxs)/sizeof(idxs[0])) { |
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248 fprintf(stderr, "%s: Too many '-a' options chosen\n", hashsum); |
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249 die(EXIT_FAILURE); |
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250 } |
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251 argn++; |
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252 continue; |
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253 } |
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254 else { |
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255 die(EXIT_FAILURE); |
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256 } |
285
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257 } |
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258 if(strcmp("-c", argv[argn]) == 0) { |
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259 check = 1; |
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260 argn++; |
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261 continue; |
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262 } |
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263 break; |
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264 } |
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265 |
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266 if (check == 1) { |
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267 check_file(argn, argc, argv); |
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268 } |
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269 |
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270 if (argc == argn) { |
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271 w = sizeof(hash_buffer); |
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272 if ((err = hash_filehandle(idxs[0], stdin, hash_buffer, &w)) != CRYPT_OK) { |
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273 fprintf(stderr, "%s: File hash error: %s\n", hashsum, error_to_string(err)); |
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274 return EXIT_FAILURE; |
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275 } else { |
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276 for (x = 0; x < w; x++) { |
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277 printf("%02x",hash_buffer[x]); |
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278 } |
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279 printf(" *-\n"); |
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280 } |
285
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281 } else { |
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282 for (z = argn; z < argc; z++) { |
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283 for (y = 0; y < idx; ++y) { |
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284 w = sizeof(hash_buffer); |
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285 if ((err = hash_file(idxs[y],argv[z],hash_buffer,&w)) != CRYPT_OK) { |
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286 fprintf(stderr, "%s: File hash error: %s\n", hashsum, error_to_string(err)); |
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287 return EXIT_FAILURE; |
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288 } else { |
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289 printf_hex(hash_buffer, w); |
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290 printf(" *%s\n", argv[z]); |
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291 } |
285
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292 } |
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293 } |
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294 } |
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295 return EXIT_SUCCESS; |
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296 } |
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297 |
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298 /* ref: $Format:%D$ */ |
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299 /* git commit: $Format:%H$ */ |
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300 /* commit time: $Format:%ai$ */ |