1 /* SHA-512 code by Jean-Luc Cooke <jlcooke@certainkey.com> 2 * 3 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> 4 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> 5 * Copyright (c) 2003 Kyle McMartin <kyle@debian.org> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2, or (at your option) any 10 * later version. 11 * 12 */ 13 #include <crypto/internal/hash.h> 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/mm.h> 17 #include <linux/init.h> 18 #include <linux/crypto.h> 19 #include <linux/types.h> 20 #include <crypto/sha.h> 21 #include <linux/percpu.h> 22 #include <asm/byteorder.h> 23 24 static inline u64 Ch(u64 x, u64 y, u64 z) 25 { 26 return z ^ (x & (y ^ z)); 27 } 28 29 static inline u64 Maj(u64 x, u64 y, u64 z) 30 { 31 return (x & y) | (z & (x | y)); 32 } 33 34 static inline u64 RORu64(u64 x, u64 y) 35 { 36 return (x >> y) | (x << (64 - y)); 37 } 38 39 static const u64 sha512_K[80] = { 40 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 41 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 42 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, 43 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 44 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 45 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 46 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, 47 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 48 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 49 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 50 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, 51 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 52 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 53 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 54 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, 55 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 56 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 57 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 58 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, 59 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 60 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 61 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 62 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, 63 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 64 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 65 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 66 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL, 67 }; 68 69 #define e0(x) (RORu64(x,28) ^ RORu64(x,34) ^ RORu64(x,39)) 70 #define e1(x) (RORu64(x,14) ^ RORu64(x,18) ^ RORu64(x,41)) 71 #define s0(x) (RORu64(x, 1) ^ RORu64(x, 8) ^ (x >> 7)) 72 #define s1(x) (RORu64(x,19) ^ RORu64(x,61) ^ (x >> 6)) 73 74 static inline void LOAD_OP(int I, u64 *W, const u8 *input) 75 { 76 W[I] = __be64_to_cpu( ((__be64*)(input))[I] ); 77 } 78 79 static inline void BLEND_OP(int I, u64 *W) 80 { 81 W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]); 82 } 83 84 static void 85 sha512_transform(u64 *state, const u8 *input) 86 { 87 u64 a, b, c, d, e, f, g, h, t1, t2; 88 89 int i; 90 u64 W[16]; 91 92 /* load the input */ 93 for (i = 0; i < 16; i++) 94 LOAD_OP(i, W, input); 95 96 /* load the state into our registers */ 97 a=state[0]; b=state[1]; c=state[2]; d=state[3]; 98 e=state[4]; f=state[5]; g=state[6]; h=state[7]; 99 100 #define SHA512_0_15(i, a, b, c, d, e, f, g, h) \ 101 t1 = h + e1(e) + Ch(e, f, g) + sha512_K[i] + W[i]; \ 102 t2 = e0(a) + Maj(a, b, c); \ 103 d += t1; \ 104 h = t1 + t2 105 106 #define SHA512_16_79(i, a, b, c, d, e, f, g, h) \ 107 BLEND_OP(i, W); \ 108 t1 = h + e1(e) + Ch(e, f, g) + sha512_K[i] + W[(i)&15]; \ 109 t2 = e0(a) + Maj(a, b, c); \ 110 d += t1; \ 111 h = t1 + t2 112 113 for (i = 0; i < 16; i += 8) { 114 SHA512_0_15(i, a, b, c, d, e, f, g, h); 115 SHA512_0_15(i + 1, h, a, b, c, d, e, f, g); 116 SHA512_0_15(i + 2, g, h, a, b, c, d, e, f); 117 SHA512_0_15(i + 3, f, g, h, a, b, c, d, e); 118 SHA512_0_15(i + 4, e, f, g, h, a, b, c, d); 119 SHA512_0_15(i + 5, d, e, f, g, h, a, b, c); 120 SHA512_0_15(i + 6, c, d, e, f, g, h, a, b); 121 SHA512_0_15(i + 7, b, c, d, e, f, g, h, a); 122 } 123 for (i = 16; i < 80; i += 8) { 124 SHA512_16_79(i, a, b, c, d, e, f, g, h); 125 SHA512_16_79(i + 1, h, a, b, c, d, e, f, g); 126 SHA512_16_79(i + 2, g, h, a, b, c, d, e, f); 127 SHA512_16_79(i + 3, f, g, h, a, b, c, d, e); 128 SHA512_16_79(i + 4, e, f, g, h, a, b, c, d); 129 SHA512_16_79(i + 5, d, e, f, g, h, a, b, c); 130 SHA512_16_79(i + 6, c, d, e, f, g, h, a, b); 131 SHA512_16_79(i + 7, b, c, d, e, f, g, h, a); 132 } 133 134 state[0] += a; state[1] += b; state[2] += c; state[3] += d; 135 state[4] += e; state[5] += f; state[6] += g; state[7] += h; 136 137 /* erase our data */ 138 a = b = c = d = e = f = g = h = t1 = t2 = 0; 139 } 140 141 static int 142 sha512_init(struct shash_desc *desc) 143 { 144 struct sha512_state *sctx = shash_desc_ctx(desc); 145 sctx->state[0] = SHA512_H0; 146 sctx->state[1] = SHA512_H1; 147 sctx->state[2] = SHA512_H2; 148 sctx->state[3] = SHA512_H3; 149 sctx->state[4] = SHA512_H4; 150 sctx->state[5] = SHA512_H5; 151 sctx->state[6] = SHA512_H6; 152 sctx->state[7] = SHA512_H7; 153 sctx->count[0] = sctx->count[1] = 0; 154 155 return 0; 156 } 157 158 static int 159 sha384_init(struct shash_desc *desc) 160 { 161 struct sha512_state *sctx = shash_desc_ctx(desc); 162 sctx->state[0] = SHA384_H0; 163 sctx->state[1] = SHA384_H1; 164 sctx->state[2] = SHA384_H2; 165 sctx->state[3] = SHA384_H3; 166 sctx->state[4] = SHA384_H4; 167 sctx->state[5] = SHA384_H5; 168 sctx->state[6] = SHA384_H6; 169 sctx->state[7] = SHA384_H7; 170 sctx->count[0] = sctx->count[1] = 0; 171 172 return 0; 173 } 174 175 static int 176 sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len) 177 { 178 struct sha512_state *sctx = shash_desc_ctx(desc); 179 180 unsigned int i, index, part_len; 181 182 /* Compute number of bytes mod 128 */ 183 index = sctx->count[0] & 0x7f; 184 185 /* Update number of bytes */ 186 if (!(sctx->count[0] += len)) 187 sctx->count[1]++; 188 189 part_len = 128 - index; 190 191 /* Transform as many times as possible. */ 192 if (len >= part_len) { 193 memcpy(&sctx->buf[index], data, part_len); 194 sha512_transform(sctx->state, sctx->buf); 195 196 for (i = part_len; i + 127 < len; i+=128) 197 sha512_transform(sctx->state, &data[i]); 198 199 index = 0; 200 } else { 201 i = 0; 202 } 203 204 /* Buffer remaining input */ 205 memcpy(&sctx->buf[index], &data[i], len - i); 206 207 return 0; 208 } 209 210 static int 211 sha512_final(struct shash_desc *desc, u8 *hash) 212 { 213 struct sha512_state *sctx = shash_desc_ctx(desc); 214 static u8 padding[128] = { 0x80, }; 215 __be64 *dst = (__be64 *)hash; 216 __be64 bits[2]; 217 unsigned int index, pad_len; 218 int i; 219 220 /* Save number of bits */ 221 bits[1] = cpu_to_be64(sctx->count[0] << 3); 222 bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61); 223 224 /* Pad out to 112 mod 128. */ 225 index = sctx->count[0] & 0x7f; 226 pad_len = (index < 112) ? (112 - index) : ((128+112) - index); 227 sha512_update(desc, padding, pad_len); 228 229 /* Append length (before padding) */ 230 sha512_update(desc, (const u8 *)bits, sizeof(bits)); 231 232 /* Store state in digest */ 233 for (i = 0; i < 8; i++) 234 dst[i] = cpu_to_be64(sctx->state[i]); 235 236 /* Zeroize sensitive information. */ 237 memset(sctx, 0, sizeof(struct sha512_state)); 238 239 return 0; 240 } 241 242 static int sha384_final(struct shash_desc *desc, u8 *hash) 243 { 244 u8 D[64]; 245 246 sha512_final(desc, D); 247 248 memcpy(hash, D, 48); 249 memset(D, 0, 64); 250 251 return 0; 252 } 253 254 static struct shash_alg sha512 = { 255 .digestsize = SHA512_DIGEST_SIZE, 256 .init = sha512_init, 257 .update = sha512_update, 258 .final = sha512_final, 259 .descsize = sizeof(struct sha512_state), 260 .base = { 261 .cra_name = "sha512", 262 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 263 .cra_blocksize = SHA512_BLOCK_SIZE, 264 .cra_module = THIS_MODULE, 265 } 266 }; 267 268 static struct shash_alg sha384 = { 269 .digestsize = SHA384_DIGEST_SIZE, 270 .init = sha384_init, 271 .update = sha512_update, 272 .final = sha384_final, 273 .descsize = sizeof(struct sha512_state), 274 .base = { 275 .cra_name = "sha384", 276 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 277 .cra_blocksize = SHA384_BLOCK_SIZE, 278 .cra_module = THIS_MODULE, 279 } 280 }; 281 282 static int __init sha512_generic_mod_init(void) 283 { 284 int ret = 0; 285 286 if ((ret = crypto_register_shash(&sha384)) < 0) 287 goto out; 288 if ((ret = crypto_register_shash(&sha512)) < 0) 289 crypto_unregister_shash(&sha384); 290 out: 291 return ret; 292 } 293 294 static void __exit sha512_generic_mod_fini(void) 295 { 296 crypto_unregister_shash(&sha384); 297 crypto_unregister_shash(&sha512); 298 } 299 300 module_init(sha512_generic_mod_init); 301 module_exit(sha512_generic_mod_fini); 302 303 MODULE_LICENSE("GPL"); 304 MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms"); 305 306 MODULE_ALIAS("sha384"); 307 MODULE_ALIAS("sha512"); 308