Mercurial > dropbear
annotate libtomcrypt/demos/encrypt.c @ 1306:34e6127ef02e
merge fixes from PuTTY import.c
toint() from misc.c
(revids are from hggit conversion)
changeset: 4620:60a336a6c85c
user: Simon Tatham <[email protected]>
date: Thu Feb 25 20:26:33 2016 +0000
files: import.c
description:
Fix potential segfaults in reading OpenSSH's ASN.1 key format.
The length coming back from ber_read_id_len might have overflowed, so
treat it as potentially negative. Also, while I'm here, accumulate it
inside ber_read_id_len as an unsigned, so as to avoid undefined
behaviour on integer overflow, and toint() it before return.
Thanks to Hanno Böck for spotting this, with the aid of AFL.
(cherry picked from commit 5b7833cd474a24ec098654dcba8cb9509f3bf2c1)
Conflicts:
import.c
(cherry-picker's note: resolving the conflict involved removing an
entire section of the original commit which fixed ECDSA code not
present on this branch)
changeset: 4619:9c6c638d98d8
user: Simon Tatham <[email protected]>
date: Sun Jul 14 10:45:54 2013 +0000
files: import.c ssh.c sshdss.c sshpubk.c sshrsa.c
description:
Tighten up a lot of casts from unsigned to int which are read by one
of the GET_32BIT macros and then used as length fields. Missing bounds
checks against zero have been added, and also I've introduced a helper
function toint() which casts from unsigned to int in such a way as to
avoid C undefined behaviour, since I'm not sure I trust compilers any
more to do the obviously sensible thing.
[originally from svn r9918]
changeset: 4618:3957829f24d3
user: Simon Tatham <[email protected]>
date: Mon Jul 08 22:36:04 2013 +0000
files: import.c sshdss.c sshrsa.c
description:
Add an assortment of extra safety checks.
[originally from svn r9896]
changeset: 4617:2cddee0bce12
user: Jacob Nevins <[email protected]>
date: Wed Dec 07 00:24:45 2005 +0000
files: import.c
description:
Institutional failure to memset() things pointed at rather than pointers.
Things should now be zeroed and memory not leaked. Spotted by Brant Thomsen.
[originally from svn r6476]
changeset: 4616:24ac78a9c71d
user: Simon Tatham <[email protected]>
date: Wed Feb 11 13:58:27 2004 +0000
files: import.c
description:
Jacob's last-minute testing found a couple of trivial bugs in
import.c, and my attempts to reproduce them in cmdgen found another
one there :-)
[originally from svn r3847]
changeset: 4615:088d39a73db0
user: Simon Tatham <[email protected]>
date: Thu Jan 22 18:52:49 2004 +0000
files: import.c
description:
Placate some gcc warnings.
[originally from svn r3761]
changeset: 4614:e4288bad4d93
parent: 1758:108b8924593d
user: Simon Tatham <[email protected]>
date: Fri Oct 03 21:21:23 2003 +0000
files: import.c
description:
My ASN.1 decoder returned wrong IDs for anything above 0x1E! Good
job it's never had to yet. Ahem.
[originally from svn r3479]
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 12 Jul 2016 23:00:01 +0800 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
rev | line source |
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285
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1 /* encrypt V1.1 Fri Oct 18 04:28:03 NZDT 2002 */ |
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2 /* File de/encryption, using libtomcrypt */ |
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3 /* Written by Daniel Richards <[email protected]> */ |
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4 /* Help from Tom St Denis with various bits */ |
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5 /* This code is public domain, no rights reserved. */ |
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6 /* Encrypts by default, -d flag enables decryption */ |
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7 /* ie: ./encrypt blowfish story.txt story.ct */ |
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8 /* ./encrypt -d blowfish story.ct story.pt */ |
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9 |
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10 #include <tomcrypt.h> |
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11 |
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12 int errno; |
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13 |
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14 int usage(char *name) |
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15 { |
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16 int x; |
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17 |
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18 printf("Usage: %s [-d](ecrypt) cipher infile outfile\nCiphers:\n", name); |
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19 for (x = 0; cipher_descriptor[x].name != NULL; x++) { |
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20 printf("%s\n",cipher_descriptor[x].name); |
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21 } |
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22 exit(1); |
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23 } |
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24 |
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25 void register_algs(void) |
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26 { |
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27 int x; |
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28 |
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29 #ifdef RIJNDAEL |
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30 register_cipher (&aes_desc); |
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31 #endif |
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32 #ifdef BLOWFISH |
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33 register_cipher (&blowfish_desc); |
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34 #endif |
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35 #ifdef XTEA |
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36 register_cipher (&xtea_desc); |
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37 #endif |
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38 #ifdef RC5 |
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39 register_cipher (&rc5_desc); |
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40 #endif |
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41 #ifdef RC6 |
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42 register_cipher (&rc6_desc); |
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43 #endif |
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44 #ifdef SAFERP |
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45 register_cipher (&saferp_desc); |
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46 #endif |
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47 #ifdef TWOFISH |
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48 register_cipher (&twofish_desc); |
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49 #endif |
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50 #ifdef SAFER |
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51 register_cipher (&safer_k64_desc); |
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52 register_cipher (&safer_sk64_desc); |
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53 register_cipher (&safer_k128_desc); |
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54 register_cipher (&safer_sk128_desc); |
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55 #endif |
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56 #ifdef RC2 |
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57 register_cipher (&rc2_desc); |
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58 #endif |
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59 #ifdef DES |
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60 register_cipher (&des_desc); |
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61 register_cipher (&des3_desc); |
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62 #endif |
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63 #ifdef CAST5 |
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64 register_cipher (&cast5_desc); |
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65 #endif |
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66 #ifdef NOEKEON |
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67 register_cipher (&noekeon_desc); |
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68 #endif |
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69 #ifdef SKIPJACK |
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70 register_cipher (&skipjack_desc); |
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71 #endif |
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72 #ifdef KHAZAD |
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73 register_cipher (&khazad_desc); |
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74 #endif |
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75 #ifdef ANUBIS |
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76 register_cipher (&anubis_desc); |
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77 #endif |
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78 |
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79 if (register_hash(&sha256_desc) == -1) { |
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80 printf("Error registering SHA256\n"); |
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81 exit(-1); |
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82 } |
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83 |
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84 if (register_prng(&yarrow_desc) == -1) { |
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85 printf("Error registering yarrow PRNG\n"); |
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86 exit(-1); |
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87 } |
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88 |
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89 if (register_prng(&sprng_desc) == -1) { |
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90 printf("Error registering sprng PRNG\n"); |
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91 exit(-1); |
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92 } |
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93 } |
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94 |
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95 int main(int argc, char *argv[]) |
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96 { |
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97 unsigned char plaintext[512],ciphertext[512]; |
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98 unsigned char tmpkey[512], key[MAXBLOCKSIZE], IV[MAXBLOCKSIZE]; |
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99 unsigned char inbuf[512]; /* i/o block size */ |
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100 unsigned long outlen, y, ivsize, x, decrypt; |
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101 symmetric_CTR ctr; |
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102 int cipher_idx, hash_idx, ks; |
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103 char *infile, *outfile, *cipher; |
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104 prng_state prng; |
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105 FILE *fdin, *fdout; |
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106 |
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107 /* register algs, so they can be printed */ |
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108 register_algs(); |
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109 |
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110 if (argc < 4) { |
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111 return usage(argv[0]); |
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112 } |
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113 |
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114 if (!strcmp(argv[1], "-d")) { |
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115 decrypt = 1; |
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116 cipher = argv[2]; |
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117 infile = argv[3]; |
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118 outfile = argv[4]; |
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119 } else { |
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120 decrypt = 0; |
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121 cipher = argv[1]; |
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122 infile = argv[2]; |
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123 outfile = argv[3]; |
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124 } |
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125 |
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126 /* file handles setup */ |
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127 fdin = fopen(infile,"rb"); |
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128 if (fdin == NULL) { |
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129 perror("Can't open input for reading"); |
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130 exit(-1); |
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131 } |
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132 |
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133 fdout = fopen(outfile,"wb"); |
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134 if (fdout == NULL) { |
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135 perror("Can't open output for writing"); |
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136 exit(-1); |
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137 } |
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138 |
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139 cipher_idx = find_cipher(cipher); |
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140 if (cipher_idx == -1) { |
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141 printf("Invalid cipher entered on command line.\n"); |
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142 exit(-1); |
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143 } |
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144 |
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145 hash_idx = find_hash("sha256"); |
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146 if (hash_idx == -1) { |
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147 printf("SHA256 not found...?\n"); |
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148 exit(-1); |
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149 } |
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150 |
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151 ivsize = cipher_descriptor[cipher_idx].block_length; |
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152 ks = hash_descriptor[hash_idx].hashsize; |
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153 if (cipher_descriptor[cipher_idx].keysize(&ks) != CRYPT_OK) { |
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154 printf("Invalid keysize???\n"); |
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155 exit(-1); |
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156 } |
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Matt Johnston <matt@ucc.asn.au>
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157 |
1b9e69c058d2
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diff
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158 printf("\nEnter key: "); |
1b9e69c058d2
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diff
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159 fgets((char *)tmpkey,sizeof(tmpkey), stdin); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
160 outlen = sizeof(key); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
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161 if ((errno = hash_memory(hash_idx,tmpkey,strlen((char *)tmpkey),key,&outlen)) != CRYPT_OK) { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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162 printf("Error hashing key: %s\n", error_to_string(errno)); |
1b9e69c058d2
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163 exit(-1); |
1b9e69c058d2
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164 } |
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165 |
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166 if (decrypt) { |
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167 /* Need to read in IV */ |
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168 if (fread(IV,1,ivsize,fdin) != ivsize) { |
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Matt Johnston <matt@ucc.asn.au>
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169 printf("Error reading IV from input.\n"); |
1b9e69c058d2
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170 exit(-1); |
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171 } |
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172 |
382
0cbe8f6dbf9e
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285
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173 if ((errno = ctr_start(cipher_idx,IV,key,ks,0,CTR_COUNTER_LITTLE_ENDIAN,&ctr)) != CRYPT_OK) { |
285
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Matt Johnston <matt@ucc.asn.au>
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174 printf("ctr_start error: %s\n",error_to_string(errno)); |
1b9e69c058d2
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175 exit(-1); |
1b9e69c058d2
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176 } |
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177 |
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178 /* IV done */ |
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179 do { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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180 y = fread(inbuf,1,sizeof(inbuf),fdin); |
1b9e69c058d2
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181 |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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182 if ((errno = ctr_decrypt(inbuf,plaintext,y,&ctr)) != CRYPT_OK) { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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diff
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183 printf("ctr_decrypt error: %s\n", error_to_string(errno)); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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184 exit(-1); |
1b9e69c058d2
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185 } |
1b9e69c058d2
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186 |
1b9e69c058d2
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187 if (fwrite(plaintext,1,y,fdout) != y) { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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diff
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188 printf("Error writing to file.\n"); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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189 exit(-1); |
1b9e69c058d2
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190 } |
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191 } while (y == sizeof(inbuf)); |
1b9e69c058d2
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192 fclose(fdin); |
1b9e69c058d2
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193 fclose(fdout); |
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194 |
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195 } else { /* encrypt */ |
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196 /* Setup yarrow for random bytes for IV */ |
1b9e69c058d2
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197 |
1b9e69c058d2
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198 if ((errno = rng_make_prng(128, find_prng("yarrow"), &prng, NULL)) != CRYPT_OK) { |
1b9e69c058d2
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199 printf("Error setting up PRNG, %s\n", error_to_string(errno)); |
1b9e69c058d2
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200 } |
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201 |
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diff
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202 /* You can use rng_get_bytes on platforms that support it */ |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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diff
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203 /* x = rng_get_bytes(IV,ivsize,NULL);*/ |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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diff
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204 x = yarrow_read(IV,ivsize,&prng); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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205 if (x != ivsize) { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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diff
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206 printf("Error reading PRNG for IV required.\n"); |
1b9e69c058d2
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207 exit(-1); |
1b9e69c058d2
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208 } |
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209 |
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210 if (fwrite(IV,1,ivsize,fdout) != ivsize) { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
211 printf("Error writing IV to output.\n"); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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212 exit(-1); |
1b9e69c058d2
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213 } |
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214 |
382
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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285
diff
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215 if ((errno = ctr_start(cipher_idx,IV,key,ks,0,CTR_COUNTER_LITTLE_ENDIAN,&ctr)) != CRYPT_OK) { |
285
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
216 printf("ctr_start error: %s\n",error_to_string(errno)); |
1b9e69c058d2
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217 exit(-1); |
1b9e69c058d2
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218 } |
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219 |
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220 do { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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|
221 y = fread(inbuf,1,sizeof(inbuf),fdin); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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222 |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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223 if ((errno = ctr_encrypt(inbuf,ciphertext,y,&ctr)) != CRYPT_OK) { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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diff
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|
224 printf("ctr_encrypt error: %s\n", error_to_string(errno)); |
1b9e69c058d2
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225 exit(-1); |
1b9e69c058d2
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226 } |
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227 |
1b9e69c058d2
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228 if (fwrite(ciphertext,1,y,fdout) != y) { |
1b9e69c058d2
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|
229 printf("Error writing to output.\n"); |
1b9e69c058d2
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230 exit(-1); |
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231 } |
1b9e69c058d2
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232 } while (y == sizeof(inbuf)); |
1b9e69c058d2
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233 fclose(fdout); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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234 fclose(fdin); |
1b9e69c058d2
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235 } |
1b9e69c058d2
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236 return 0; |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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237 } |
1b9e69c058d2
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238 |
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239 /* $Source: /cvs/libtom/libtomcrypt/demos/encrypt.c,v $ */ |
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240 /* $Revision: 1.3 $ */ |
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241 /* $Date: 2005/08/04 20:43:50 $ */ |