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annotate src/hashes/sha1.c @ 191:1c15b283127b libtomcrypt-orig

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Import of libtomcrypt 1.02 with manual path rename rearrangement etc
author Matt Johnston <matt@ucc.asn.au>
date Fri, 06 May 2005 13:23:02 +0000
parents
children 9cc34777b479 39d5d58461d6
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191
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
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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 * Tom St Denis, [email protected], http://libtomcrypt.org
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10 */
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11 #include "tomcrypt.h"
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12
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13 /**
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14 @file sha1.c
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15 SHA1 code by Tom St Denis
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16 */
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17
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18
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19 #ifdef SHA1
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20
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21 const struct ltc_hash_descriptor sha1_desc =
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22 {
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23 "sha1",
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24 2,
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25 20,
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26 64,
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27
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28 /* DER identifier */
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29 { 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2B, 0x0E,
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30 0x03, 0x02, 0x1A, 0x05, 0x00, 0x04, 0x14 },
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31 15,
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32
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33 &sha1_init,
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34 &sha1_process,
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35 &sha1_done,
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36 &sha1_test
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37 };
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38
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39 #define F0(x,y,z) (z ^ (x & (y ^ z)))
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40 #define F1(x,y,z) (x ^ y ^ z)
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41 #define F2(x,y,z) ((x & y) | (z & (x | y)))
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42 #define F3(x,y,z) (x ^ y ^ z)
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43
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44 #ifdef LTC_CLEAN_STACK
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45 static int _sha1_compress(hash_state *md, unsigned char *buf)
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46 #else
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47 static int sha1_compress(hash_state *md, unsigned char *buf)
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48 #endif
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49 {
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50 ulong32 a,b,c,d,e,W[80],i;
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51 #ifdef LTC_SMALL_CODE
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52 ulong32 t;
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53 #endif
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54
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55 /* copy the state into 512-bits into W[0..15] */
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56 for (i = 0; i < 16; i++) {
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57 LOAD32H(W[i], buf + (4*i));
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58 }
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59
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60 /* copy state */
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61 a = md->sha1.state[0];
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62 b = md->sha1.state[1];
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63 c = md->sha1.state[2];
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64 d = md->sha1.state[3];
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65 e = md->sha1.state[4];
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66
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67 /* expand it */
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68 for (i = 16; i < 80; i++) {
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69 W[i] = ROL(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);
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70 }
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71
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72 /* compress */
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73 /* round one */
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74 #define FF0(a,b,c,d,e,i) e = (ROLc(a, 5) + F0(b,c,d) + e + W[i] + 0x5a827999UL); b = ROLc(b, 30);
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75 #define FF1(a,b,c,d,e,i) e = (ROLc(a, 5) + F1(b,c,d) + e + W[i] + 0x6ed9eba1UL); b = ROLc(b, 30);
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76 #define FF2(a,b,c,d,e,i) e = (ROLc(a, 5) + F2(b,c,d) + e + W[i] + 0x8f1bbcdcUL); b = ROLc(b, 30);
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77 #define FF3(a,b,c,d,e,i) e = (ROLc(a, 5) + F3(b,c,d) + e + W[i] + 0xca62c1d6UL); b = ROLc(b, 30);
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78
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79 #ifdef LTC_SMALL_CODE
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80
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81 for (i = 0; i < 20; ) {
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82 FF0(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
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83 }
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84
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85 for (; i < 40; ) {
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86 FF1(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
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87 }
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88
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89 for (; i < 60; ) {
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90 FF2(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
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91 }
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92
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93 for (; i < 80; ) {
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94 FF3(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t;
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95 }
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96
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97 #else
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98
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99 for (i = 0; i < 20; ) {
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100 FF0(a,b,c,d,e,i++);
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101 FF0(e,a,b,c,d,i++);
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102 FF0(d,e,a,b,c,i++);
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103 FF0(c,d,e,a,b,i++);
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104 FF0(b,c,d,e,a,i++);
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105 }
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106
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107 /* round two */
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108 for (; i < 40; ) {
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109 FF1(a,b,c,d,e,i++);
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110 FF1(e,a,b,c,d,i++);
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111 FF1(d,e,a,b,c,i++);
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112 FF1(c,d,e,a,b,i++);
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113 FF1(b,c,d,e,a,i++);
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114 }
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115
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116 /* round three */
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117 for (; i < 60; ) {
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118 FF2(a,b,c,d,e,i++);
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119 FF2(e,a,b,c,d,i++);
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120 FF2(d,e,a,b,c,i++);
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121 FF2(c,d,e,a,b,i++);
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122 FF2(b,c,d,e,a,i++);
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123 }
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124
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125 /* round four */
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126 for (; i < 80; ) {
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127 FF3(a,b,c,d,e,i++);
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128 FF3(e,a,b,c,d,i++);
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129 FF3(d,e,a,b,c,i++);
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130 FF3(c,d,e,a,b,i++);
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131 FF3(b,c,d,e,a,i++);
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132 }
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diff changeset
133 #endif
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diff changeset
134
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diff changeset
135 #undef FF0
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parents:
diff changeset
136 #undef FF1
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
137 #undef FF2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
138 #undef FF3
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diff changeset
139
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diff changeset
140 /* store */
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parents:
diff changeset
141 md->sha1.state[0] = md->sha1.state[0] + a;
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diff changeset
142 md->sha1.state[1] = md->sha1.state[1] + b;
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parents:
diff changeset
143 md->sha1.state[2] = md->sha1.state[2] + c;
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diff changeset
144 md->sha1.state[3] = md->sha1.state[3] + d;
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diff changeset
145 md->sha1.state[4] = md->sha1.state[4] + e;
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diff changeset
146
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diff changeset
147 return CRYPT_OK;
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parents:
diff changeset
148 }
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diff changeset
149
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parents:
diff changeset
150 #ifdef LTC_CLEAN_STACK
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parents:
diff changeset
151 static int sha1_compress(hash_state *md, unsigned char *buf)
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152 {
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diff changeset
153 int err;
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diff changeset
154 err = _sha1_compress(md, buf);
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parents:
diff changeset
155 burn_stack(sizeof(ulong32) * 87);
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parents:
diff changeset
156 return err;
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diff changeset
157 }
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parents:
diff changeset
158 #endif
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diff changeset
159
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Matt Johnston <matt@ucc.asn.au>
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160 /**
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
161 Initialize the hash state
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diff changeset
162 @param md The hash state you wish to initialize
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diff changeset
163 @return CRYPT_OK if successful
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diff changeset
164 */
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165 int sha1_init(hash_state * md)
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parents:
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166 {
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167 LTC_ARGCHK(md != NULL);
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diff changeset
168 md->sha1.state[0] = 0x67452301UL;
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diff changeset
169 md->sha1.state[1] = 0xefcdab89UL;
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diff changeset
170 md->sha1.state[2] = 0x98badcfeUL;
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diff changeset
171 md->sha1.state[3] = 0x10325476UL;
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diff changeset
172 md->sha1.state[4] = 0xc3d2e1f0UL;
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diff changeset
173 md->sha1.curlen = 0;
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diff changeset
174 md->sha1.length = 0;
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diff changeset
175 return CRYPT_OK;
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parents:
diff changeset
176 }
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diff changeset
177
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178 /**
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
179 Process a block of memory though the hash
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
180 @param md The hash state
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
181 @param in The data to hash
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diff changeset
182 @param inlen The length of the data (octets)
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diff changeset
183 @return CRYPT_OK if successful
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diff changeset
184 */
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diff changeset
185 HASH_PROCESS(sha1_process, sha1_compress, sha1, 64)
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diff changeset
186
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diff changeset
187 /**
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diff changeset
188 Terminate the hash to get the digest
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Matt Johnston <matt@ucc.asn.au>
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diff changeset
189 @param md The hash state
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190 @param out [out] The destination of the hash (20 bytes)
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diff changeset
191 @return CRYPT_OK if successful
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192 */
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diff changeset
193 int sha1_done(hash_state * md, unsigned char *out)
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194 {
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195 int i;
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196
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197 LTC_ARGCHK(md != NULL);
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diff changeset
198 LTC_ARGCHK(out != NULL);
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199
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diff changeset
200 if (md->sha1.curlen >= sizeof(md->sha1.buf)) {
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201 return CRYPT_INVALID_ARG;
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parents:
diff changeset
202 }
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diff changeset
203
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diff changeset
204 /* increase the length of the message */
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diff changeset
205 md->sha1.length += md->sha1.curlen * 8;
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parents:
diff changeset
206
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parents:
diff changeset
207 /* append the '1' bit */
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diff changeset
208 md->sha1.buf[md->sha1.curlen++] = (unsigned char)0x80;
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parents:
diff changeset
209
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parents:
diff changeset
210 /* if the length is currently above 56 bytes we append zeros
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
211 * then compress. Then we can fall back to padding zeros and length
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
212 * encoding like normal.
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parents:
diff changeset
213 */
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parents:
diff changeset
214 if (md->sha1.curlen > 56) {
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parents:
diff changeset
215 while (md->sha1.curlen < 64) {
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parents:
diff changeset
216 md->sha1.buf[md->sha1.curlen++] = (unsigned char)0;
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parents:
diff changeset
217 }
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parents:
diff changeset
218 sha1_compress(md, md->sha1.buf);
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parents:
diff changeset
219 md->sha1.curlen = 0;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
220 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
221
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
222 /* pad upto 56 bytes of zeroes */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
223 while (md->sha1.curlen < 56) {
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parents:
diff changeset
224 md->sha1.buf[md->sha1.curlen++] = (unsigned char)0;
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parents:
diff changeset
225 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
226
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
227 /* store length */
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parents:
diff changeset
228 STORE64H(md->sha1.length, md->sha1.buf+56);
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parents:
diff changeset
229 sha1_compress(md, md->sha1.buf);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
230
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
231 /* copy output */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
232 for (i = 0; i < 5; i++) {
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parents:
diff changeset
233 STORE32H(md->sha1.state[i], out+(4*i));
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parents:
diff changeset
234 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
235 #ifdef LTC_CLEAN_STACK
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
236 zeromem(md, sizeof(hash_state));
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
237 #endif
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
238 return CRYPT_OK;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
239 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
240
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
241 /**
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
242 Self-test the hash
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
243 @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
244 */
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
245 int sha1_test(void)
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
246 {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
247 #ifndef LTC_TEST
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
248 return CRYPT_NOP;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
249 #else
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
250 static const struct {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
251 char *msg;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
252 unsigned char hash[20];
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
253 } tests[] = {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
254 { "abc",
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
255 { 0xa9, 0x99, 0x3e, 0x36, 0x47, 0x06, 0x81, 0x6a,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
256 0xba, 0x3e, 0x25, 0x71, 0x78, 0x50, 0xc2, 0x6c,
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
257 0x9c, 0xd0, 0xd8, 0x9d }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
258 },
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
259 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
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parents:
diff changeset
260 { 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
261 0xBA, 0xAE, 0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5,
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
262 0xE5, 0x46, 0x70, 0xF1 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
263 }
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
264 };
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
265
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
266 int i;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
267 unsigned char tmp[20];
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
268 hash_state md;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
269
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
270 for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
271 sha1_init(&md);
1c15b283127b Import of libtomcrypt 1.02 with manual path rename rearrangement etc
Matt Johnston <matt@ucc.asn.au>
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272 sha1_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg));
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273 sha1_done(&md, tmp);
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274 if (memcmp(tmp, tests[i].hash, 20) != 0) {
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275 return CRYPT_FAIL_TESTVECTOR;
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276 }
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277 }
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278 return CRYPT_OK;
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279 #endif
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280 }
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281
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282 #endif
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283
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284