Mercurial > dropbear
annotate libtomcrypt/demos/ltcrypt.c @ 1772:0cc85b4a4abb
Move fuzzer-kex initialisation into a constructor function
Hopefully this can avoid hitting AFL timeouts
https://github.com/google/oss-fuzz/pull/2474
author | Matt Johnston <matt@ucc.asn.au> |
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date | Thu, 29 Oct 2020 23:00:52 +0800 |
parents | 6dba84798cd5 |
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rev | line source |
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1471
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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 |
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10 /* encrypt V1.1 Fri Oct 18 04:28:03 NZDT 2002 */ |
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11 /* File de/encryption, using libtomcrypt */ |
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12 /* Written by Daniel Richards <[email protected]> */ |
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13 /* Help from Tom St Denis with various bits */ |
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14 /* This code is public domain, no rights reserved. */ |
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15 /* Encrypts by default, -d flag enables decryption */ |
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16 /* ie: ./encrypt blowfish story.txt story.ct */ |
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17 /* ./encrypt -d blowfish story.ct story.pt */ |
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18 |
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19 #include <tomcrypt.h> |
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20 |
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21 int usage(char *name) |
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22 { |
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23 int x; |
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24 |
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25 printf("Usage encrypt: %s cipher infile outfile\n", name); |
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26 printf("Usage decrypt: %s -d cipher infile outfile\n", name); |
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27 printf("Usage test: %s -t cipher\nCiphers:\n", name); |
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28 for (x = 0; cipher_descriptor[x].name != NULL; x++) { |
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29 printf("%s\n",cipher_descriptor[x].name); |
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30 } |
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31 exit(1); |
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32 } |
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33 |
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34 int main(int argc, char *argv[]) |
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35 { |
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36 unsigned char plaintext[512],ciphertext[512]; |
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37 unsigned char tmpkey[512], key[MAXBLOCKSIZE], IV[MAXBLOCKSIZE]; |
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38 unsigned char inbuf[512]; /* i/o block size */ |
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39 unsigned long outlen, y, ivsize, x, decrypt; |
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40 symmetric_CTR ctr; |
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41 int cipher_idx, hash_idx, ks; |
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42 char *infile, *outfile, *cipher; |
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43 prng_state prng; |
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44 FILE *fdin, *fdout; |
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45 int err; |
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46 |
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47 /* register algs, so they can be printed */ |
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48 register_all_ciphers(); |
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49 register_all_hashes(); |
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50 register_all_prngs(); |
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51 |
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52 if (argc < 4) { |
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53 if ((argc > 2) && (!strcmp(argv[1], "-t"))) { |
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54 cipher = argv[2]; |
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55 cipher_idx = find_cipher(cipher); |
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56 if (cipher_idx == -1) { |
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57 printf("Invalid cipher %s entered on command line.\n", cipher); |
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58 exit(-1); |
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59 } /* if */ |
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60 if (cipher_descriptor[cipher_idx].test) |
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61 { |
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62 if (cipher_descriptor[cipher_idx].test() != CRYPT_OK) |
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63 { |
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64 printf("Error when testing cipher %s.\n", cipher); |
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65 exit(-1); |
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66 } |
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67 else |
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68 { |
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69 printf("Testing cipher %s succeeded.\n", cipher); |
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70 exit(0); |
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71 } /* if ... else */ |
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72 } /* if */ |
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73 } |
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74 return usage(argv[0]); |
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75 } |
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76 |
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77 if (!strcmp(argv[1], "-d")) { |
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78 decrypt = 1; |
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79 cipher = argv[2]; |
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80 infile = argv[3]; |
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81 outfile = argv[4]; |
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82 } else { |
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83 decrypt = 0; |
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84 cipher = argv[1]; |
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85 infile = argv[2]; |
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86 outfile = argv[3]; |
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87 } |
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88 |
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89 /* file handles setup */ |
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90 fdin = fopen(infile,"rb"); |
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91 if (fdin == NULL) { |
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92 perror("Can't open input for reading"); |
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93 exit(-1); |
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94 } |
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95 |
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96 fdout = fopen(outfile,"wb"); |
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97 if (fdout == NULL) { |
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98 perror("Can't open output for writing"); |
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99 exit(-1); |
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100 } |
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101 |
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102 cipher_idx = find_cipher(cipher); |
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103 if (cipher_idx == -1) { |
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104 printf("Invalid cipher entered on command line.\n"); |
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105 exit(-1); |
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106 } |
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107 |
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108 hash_idx = find_hash("sha256"); |
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109 if (hash_idx == -1) { |
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110 printf("LTC_SHA256 not found...?\n"); |
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111 exit(-1); |
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112 } |
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113 |
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114 ivsize = cipher_descriptor[cipher_idx].block_length; |
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115 ks = hash_descriptor[hash_idx].hashsize; |
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116 if (cipher_descriptor[cipher_idx].keysize(&ks) != CRYPT_OK) { |
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117 printf("Invalid keysize???\n"); |
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118 exit(-1); |
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119 } |
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120 |
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121 printf("\nEnter key: "); |
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122 if(fgets((char *)tmpkey,sizeof(tmpkey), stdin) == NULL) |
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123 exit(-1); |
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124 outlen = sizeof(key); |
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125 if ((err = hash_memory(hash_idx,tmpkey,strlen((char *)tmpkey),key,&outlen)) != CRYPT_OK) { |
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126 printf("Error hashing key: %s\n", error_to_string(err)); |
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127 exit(-1); |
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128 } |
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129 |
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130 if (decrypt) { |
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131 /* Need to read in IV */ |
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132 if (fread(IV,1,ivsize,fdin) != ivsize) { |
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133 printf("Error reading IV from input.\n"); |
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134 exit(-1); |
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135 } |
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136 |
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137 if ((err = ctr_start(cipher_idx,IV,key,ks,0,CTR_COUNTER_LITTLE_ENDIAN,&ctr)) != CRYPT_OK) { |
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138 printf("ctr_start error: %s\n",error_to_string(err)); |
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139 exit(-1); |
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140 } |
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141 |
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142 /* IV done */ |
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143 do { |
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144 y = fread(inbuf,1,sizeof(inbuf),fdin); |
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145 |
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146 if ((err = ctr_decrypt(inbuf,plaintext,y,&ctr)) != CRYPT_OK) { |
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147 printf("ctr_decrypt error: %s\n", error_to_string(err)); |
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148 exit(-1); |
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149 } |
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150 |
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151 if (fwrite(plaintext,1,y,fdout) != y) { |
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152 printf("Error writing to file.\n"); |
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153 exit(-1); |
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154 } |
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155 } while (y == sizeof(inbuf)); |
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156 fclose(fdin); |
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157 fclose(fdout); |
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158 |
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159 } else { /* encrypt */ |
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160 /* Setup yarrow for random bytes for IV */ |
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161 |
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162 if ((err = rng_make_prng(128, find_prng("yarrow"), &prng, NULL)) != CRYPT_OK) { |
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163 printf("Error setting up PRNG, %s\n", error_to_string(err)); |
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164 } |
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165 |
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166 /* You can use rng_get_bytes on platforms that support it */ |
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167 /* x = rng_get_bytes(IV,ivsize,NULL);*/ |
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168 x = yarrow_read(IV,ivsize,&prng); |
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169 if (x != ivsize) { |
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170 printf("Error reading PRNG for IV required.\n"); |
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171 exit(-1); |
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172 } |
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173 |
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174 if (fwrite(IV,1,ivsize,fdout) != ivsize) { |
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175 printf("Error writing IV to output.\n"); |
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176 exit(-1); |
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177 } |
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178 |
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179 if ((err = ctr_start(cipher_idx,IV,key,ks,0,CTR_COUNTER_LITTLE_ENDIAN,&ctr)) != CRYPT_OK) { |
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180 printf("ctr_start error: %s\n",error_to_string(err)); |
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181 exit(-1); |
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182 } |
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183 |
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184 do { |
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185 y = fread(inbuf,1,sizeof(inbuf),fdin); |
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186 |
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187 if ((err = ctr_encrypt(inbuf,ciphertext,y,&ctr)) != CRYPT_OK) { |
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188 printf("ctr_encrypt error: %s\n", error_to_string(err)); |
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189 exit(-1); |
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190 } |
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191 |
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192 if (fwrite(ciphertext,1,y,fdout) != y) { |
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193 printf("Error writing to output.\n"); |
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194 exit(-1); |
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195 } |
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196 } while (y == sizeof(inbuf)); |
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197 fclose(fdout); |
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198 fclose(fdin); |
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199 } |
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200 return 0; |
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201 } |
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202 |
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203 /* ref: $Format:%D$ */ |
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204 /* git commit: $Format:%H$ */ |
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205 /* commit time: $Format:%ai$ */ |