Blame view
crypto/md5.c
7.43 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
/* * Cryptographic API. * * MD5 Message Digest Algorithm (RFC1321). * * Derived from cryptoapi implementation, originally based on the * public domain implementation written by Colin Plumb in 1993. * * Copyright (c) Cryptoapi developers. * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * */ |
14b75ba70 crypto: md5 - Swi... |
18 |
#include <crypto/internal/hash.h> |
7d6f75eb2 crypto: md5 - Add... |
19 |
#include <crypto/md5.h> |
1da177e4c Linux-2.6.12-rc2 |
20 21 22 |
#include <linux/init.h> #include <linux/module.h> #include <linux/string.h> |
06ace7a9b [CRYPTO] Use stan... |
23 |
#include <linux/types.h> |
1da177e4c Linux-2.6.12-rc2 |
24 |
#include <asm/byteorder.h> |
3c7eb3cc8 md5: remove from ... |
25 26 |
#define MD5_DIGEST_WORDS 4 #define MD5_MESSAGE_BYTES 64 |
0c4c78de0 crypto: hash - ad... |
27 28 29 30 31 |
const u8 md5_zero_message_hash[MD5_DIGEST_SIZE] = { 0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04, 0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e, }; EXPORT_SYMBOL_GPL(md5_zero_message_hash); |
3c7eb3cc8 md5: remove from ... |
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 |
#define F1(x, y, z) (z ^ (x & (y ^ z))) #define F2(x, y, z) F1(z, x, y) #define F3(x, y, z) (x ^ y ^ z) #define F4(x, y, z) (y ^ (x | ~z)) #define MD5STEP(f, w, x, y, z, in, s) \ (w += f(x, y, z) + in, w = (w<<s | w>>(32-s)) + x) static void md5_transform(__u32 *hash, __u32 const *in) { u32 a, b, c, d; a = hash[0]; b = hash[1]; c = hash[2]; d = hash[3]; MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); hash[0] += a; hash[1] += b; hash[2] += c; hash[3] += d; } |
7d6f75eb2 crypto: md5 - Add... |
122 |
static inline void md5_transform_helper(struct md5_state *ctx) |
1da177e4c Linux-2.6.12-rc2 |
123 124 125 126 |
{ le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(u32)); md5_transform(ctx->hash, ctx->block); } |
14b75ba70 crypto: md5 - Swi... |
127 |
static int md5_init(struct shash_desc *desc) |
1da177e4c Linux-2.6.12-rc2 |
128 |
{ |
7d6f75eb2 crypto: md5 - Add... |
129 |
struct md5_state *mctx = shash_desc_ctx(desc); |
1da177e4c Linux-2.6.12-rc2 |
130 |
|
6a185016f crypto: md5 - use... |
131 132 133 134 |
mctx->hash[0] = MD5_H0; mctx->hash[1] = MD5_H1; mctx->hash[2] = MD5_H2; mctx->hash[3] = MD5_H3; |
1da177e4c Linux-2.6.12-rc2 |
135 |
mctx->byte_count = 0; |
14b75ba70 crypto: md5 - Swi... |
136 137 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
138 |
} |
14b75ba70 crypto: md5 - Swi... |
139 |
static int md5_update(struct shash_desc *desc, const u8 *data, unsigned int len) |
1da177e4c Linux-2.6.12-rc2 |
140 |
{ |
7d6f75eb2 crypto: md5 - Add... |
141 |
struct md5_state *mctx = shash_desc_ctx(desc); |
1da177e4c Linux-2.6.12-rc2 |
142 143 144 145 146 147 148 |
const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f); mctx->byte_count += len; if (avail > len) { memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), data, len); |
14b75ba70 crypto: md5 - Swi... |
149 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 |
} memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), data, avail); md5_transform_helper(mctx); data += avail; len -= avail; while (len >= sizeof(mctx->block)) { memcpy(mctx->block, data, sizeof(mctx->block)); md5_transform_helper(mctx); data += sizeof(mctx->block); len -= sizeof(mctx->block); } memcpy(mctx->block, data, len); |
14b75ba70 crypto: md5 - Swi... |
167 168 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
169 |
} |
14b75ba70 crypto: md5 - Swi... |
170 |
static int md5_final(struct shash_desc *desc, u8 *out) |
1da177e4c Linux-2.6.12-rc2 |
171 |
{ |
7d6f75eb2 crypto: md5 - Add... |
172 |
struct md5_state *mctx = shash_desc_ctx(desc); |
1da177e4c Linux-2.6.12-rc2 |
173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 |
const unsigned int offset = mctx->byte_count & 0x3f; char *p = (char *)mctx->block + offset; int padding = 56 - (offset + 1); *p++ = 0x80; if (padding < 0) { memset(p, 0x00, padding + sizeof (u64)); md5_transform_helper(mctx); p = (char *)mctx->block; padding = 56; } memset(p, 0, padding); mctx->block[14] = mctx->byte_count << 3; mctx->block[15] = mctx->byte_count >> 29; le32_to_cpu_array(mctx->block, (sizeof(mctx->block) - sizeof(u64)) / sizeof(u32)); md5_transform(mctx->hash, mctx->block); cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(u32)); memcpy(out, mctx->hash, sizeof(mctx->hash)); memset(mctx, 0, sizeof(*mctx)); |
14b75ba70 crypto: md5 - Swi... |
194 195 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
196 |
} |
7d6f75eb2 crypto: md5 - Add... |
197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 |
static int md5_export(struct shash_desc *desc, void *out) { struct md5_state *ctx = shash_desc_ctx(desc); memcpy(out, ctx, sizeof(*ctx)); return 0; } static int md5_import(struct shash_desc *desc, const void *in) { struct md5_state *ctx = shash_desc_ctx(desc); memcpy(ctx, in, sizeof(*ctx)); return 0; } |
14b75ba70 crypto: md5 - Swi... |
212 213 214 215 216 |
static struct shash_alg alg = { .digestsize = MD5_DIGEST_SIZE, .init = md5_init, .update = md5_update, .final = md5_final, |
7d6f75eb2 crypto: md5 - Add... |
217 218 219 |
.export = md5_export, .import = md5_import, .descsize = sizeof(struct md5_state), |
eebb111f5 crypto: md5 - Set... |
220 |
.statesize = sizeof(struct md5_state), |
14b75ba70 crypto: md5 - Swi... |
221 222 223 224 225 226 |
.base = { .cra_name = "md5", .cra_flags = CRYPTO_ALG_TYPE_SHASH, .cra_blocksize = MD5_HMAC_BLOCK_SIZE, .cra_module = THIS_MODULE, } |
1da177e4c Linux-2.6.12-rc2 |
227 |
}; |
3af5b90bd [CRYPTO] all: Cle... |
228 |
static int __init md5_mod_init(void) |
1da177e4c Linux-2.6.12-rc2 |
229 |
{ |
14b75ba70 crypto: md5 - Swi... |
230 |
return crypto_register_shash(&alg); |
1da177e4c Linux-2.6.12-rc2 |
231 |
} |
3af5b90bd [CRYPTO] all: Cle... |
232 |
static void __exit md5_mod_fini(void) |
1da177e4c Linux-2.6.12-rc2 |
233 |
{ |
14b75ba70 crypto: md5 - Swi... |
234 |
crypto_unregister_shash(&alg); |
1da177e4c Linux-2.6.12-rc2 |
235 |
} |
3af5b90bd [CRYPTO] all: Cle... |
236 237 |
module_init(md5_mod_init); module_exit(md5_mod_fini); |
1da177e4c Linux-2.6.12-rc2 |
238 239 240 |
MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("MD5 Message Digest Algorithm"); |
5d26a105b crypto: prefix mo... |
241 |
MODULE_ALIAS_CRYPTO("md5"); |