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 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 17 #include <linux/mm.h> 18 #include <linux/init.h> 19 #include <linux/crypto.h> 20 21 #include <asm/scatterlist.h> 22 #include <asm/byteorder.h> 23 24 #define SHA384_DIGEST_SIZE 48 25 #define SHA512_DIGEST_SIZE 64 26 #define SHA384_HMAC_BLOCK_SIZE 96 27 #define SHA512_HMAC_BLOCK_SIZE 128 28 29 struct sha512_ctx { 30 u64 state[8]; 31 u32 count[4]; 32 u8 buf[128]; 33 u64 W[80]; 34 }; 35 36 static inline u64 Ch(u64 x, u64 y, u64 z) 37 { 38 return z ^ (x & (y ^ z)); 39 } 40 41 static inline u64 Maj(u64 x, u64 y, u64 z) 42 { 43 return (x & y) | (z & (x | y)); 44 } 45 46 static inline u64 RORu64(u64 x, u64 y) 47 { 48 return (x >> y) | (x << (64 - y)); 49 } 50 51 static const u64 sha512_K[80] = { 52 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 53 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 54 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, 55 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 56 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 57 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 58 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, 59 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 60 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 61 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 62 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, 63 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 64 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 65 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 66 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, 67 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 68 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 69 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 70 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, 71 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 72 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 73 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 74 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, 75 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 76 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 77 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 78 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL, 79 }; 80 81 #define e0(x) (RORu64(x,28) ^ RORu64(x,34) ^ RORu64(x,39)) 82 #define e1(x) (RORu64(x,14) ^ RORu64(x,18) ^ RORu64(x,41)) 83 #define s0(x) (RORu64(x, 1) ^ RORu64(x, 8) ^ (x >> 7)) 84 #define s1(x) (RORu64(x,19) ^ RORu64(x,61) ^ (x >> 6)) 85 86 /* H* initial state for SHA-512 */ 87 #define H0 0x6a09e667f3bcc908ULL 88 #define H1 0xbb67ae8584caa73bULL 89 #define H2 0x3c6ef372fe94f82bULL 90 #define H3 0xa54ff53a5f1d36f1ULL 91 #define H4 0x510e527fade682d1ULL 92 #define H5 0x9b05688c2b3e6c1fULL 93 #define H6 0x1f83d9abfb41bd6bULL 94 #define H7 0x5be0cd19137e2179ULL 95 96 /* H'* initial state for SHA-384 */ 97 #define HP0 0xcbbb9d5dc1059ed8ULL 98 #define HP1 0x629a292a367cd507ULL 99 #define HP2 0x9159015a3070dd17ULL 100 #define HP3 0x152fecd8f70e5939ULL 101 #define HP4 0x67332667ffc00b31ULL 102 #define HP5 0x8eb44a8768581511ULL 103 #define HP6 0xdb0c2e0d64f98fa7ULL 104 #define HP7 0x47b5481dbefa4fa4ULL 105 106 static inline void LOAD_OP(int I, u64 *W, const u8 *input) 107 { 108 W[I] = __be64_to_cpu( ((__be64*)(input))[I] ); 109 } 110 111 static inline void BLEND_OP(int I, u64 *W) 112 { 113 W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; 114 } 115 116 static void 117 sha512_transform(u64 *state, u64 *W, const u8 *input) 118 { 119 u64 a, b, c, d, e, f, g, h, t1, t2; 120 121 int i; 122 123 /* load the input */ 124 for (i = 0; i < 16; i++) 125 LOAD_OP(i, W, input); 126 127 for (i = 16; i < 80; i++) { 128 BLEND_OP(i, W); 129 } 130 131 /* load the state into our registers */ 132 a=state[0]; b=state[1]; c=state[2]; d=state[3]; 133 e=state[4]; f=state[5]; g=state[6]; h=state[7]; 134 135 /* now iterate */ 136 for (i=0; i<80; i+=8) { 137 t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[i ]; 138 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 139 t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[i+1]; 140 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 141 t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[i+2]; 142 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 143 t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[i+3]; 144 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 145 t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[i+4]; 146 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 147 t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[i+5]; 148 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 149 t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[i+6]; 150 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 151 t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[i+7]; 152 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 153 } 154 155 state[0] += a; state[1] += b; state[2] += c; state[3] += d; 156 state[4] += e; state[5] += f; state[6] += g; state[7] += h; 157 158 /* erase our data */ 159 a = b = c = d = e = f = g = h = t1 = t2 = 0; 160 } 161 162 static void 163 sha512_init(void *ctx) 164 { 165 struct sha512_ctx *sctx = ctx; 166 sctx->state[0] = H0; 167 sctx->state[1] = H1; 168 sctx->state[2] = H2; 169 sctx->state[3] = H3; 170 sctx->state[4] = H4; 171 sctx->state[5] = H5; 172 sctx->state[6] = H6; 173 sctx->state[7] = H7; 174 sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; 175 memset(sctx->buf, 0, sizeof(sctx->buf)); 176 } 177 178 static void 179 sha384_init(void *ctx) 180 { 181 struct sha512_ctx *sctx = ctx; 182 sctx->state[0] = HP0; 183 sctx->state[1] = HP1; 184 sctx->state[2] = HP2; 185 sctx->state[3] = HP3; 186 sctx->state[4] = HP4; 187 sctx->state[5] = HP5; 188 sctx->state[6] = HP6; 189 sctx->state[7] = HP7; 190 sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; 191 memset(sctx->buf, 0, sizeof(sctx->buf)); 192 } 193 194 static void 195 sha512_update(void *ctx, const u8 *data, unsigned int len) 196 { 197 struct sha512_ctx *sctx = ctx; 198 199 unsigned int i, index, part_len; 200 201 /* Compute number of bytes mod 128 */ 202 index = (unsigned int)((sctx->count[0] >> 3) & 0x7F); 203 204 /* Update number of bits */ 205 if ((sctx->count[0] += (len << 3)) < (len << 3)) { 206 if ((sctx->count[1] += 1) < 1) 207 if ((sctx->count[2] += 1) < 1) 208 sctx->count[3]++; 209 sctx->count[1] += (len >> 29); 210 } 211 212 part_len = 128 - index; 213 214 /* Transform as many times as possible. */ 215 if (len >= part_len) { 216 memcpy(&sctx->buf[index], data, part_len); 217 sha512_transform(sctx->state, sctx->W, sctx->buf); 218 219 for (i = part_len; i + 127 < len; i+=128) 220 sha512_transform(sctx->state, sctx->W, &data[i]); 221 222 index = 0; 223 } else { 224 i = 0; 225 } 226 227 /* Buffer remaining input */ 228 memcpy(&sctx->buf[index], &data[i], len - i); 229 230 /* erase our data */ 231 memset(sctx->W, 0, sizeof(sctx->W)); 232 } 233 234 static void 235 sha512_final(void *ctx, u8 *hash) 236 { 237 struct sha512_ctx *sctx = ctx; 238 239 static u8 padding[128] = { 0x80, }; 240 241 u32 t; 242 u64 t2; 243 u8 bits[128]; 244 unsigned int index, pad_len; 245 int i, j; 246 247 index = pad_len = t = i = j = 0; 248 t2 = 0; 249 250 /* Save number of bits */ 251 t = sctx->count[0]; 252 bits[15] = t; t>>=8; 253 bits[14] = t; t>>=8; 254 bits[13] = t; t>>=8; 255 bits[12] = t; 256 t = sctx->count[1]; 257 bits[11] = t; t>>=8; 258 bits[10] = t; t>>=8; 259 bits[9 ] = t; t>>=8; 260 bits[8 ] = t; 261 t = sctx->count[2]; 262 bits[7 ] = t; t>>=8; 263 bits[6 ] = t; t>>=8; 264 bits[5 ] = t; t>>=8; 265 bits[4 ] = t; 266 t = sctx->count[3]; 267 bits[3 ] = t; t>>=8; 268 bits[2 ] = t; t>>=8; 269 bits[1 ] = t; t>>=8; 270 bits[0 ] = t; 271 272 /* Pad out to 112 mod 128. */ 273 index = (sctx->count[0] >> 3) & 0x7f; 274 pad_len = (index < 112) ? (112 - index) : ((128+112) - index); 275 sha512_update(sctx, padding, pad_len); 276 277 /* Append length (before padding) */ 278 sha512_update(sctx, bits, 16); 279 280 /* Store state in digest */ 281 for (i = j = 0; i < 8; i++, j += 8) { 282 t2 = sctx->state[i]; 283 hash[j+7] = (char)t2 & 0xff; t2>>=8; 284 hash[j+6] = (char)t2 & 0xff; t2>>=8; 285 hash[j+5] = (char)t2 & 0xff; t2>>=8; 286 hash[j+4] = (char)t2 & 0xff; t2>>=8; 287 hash[j+3] = (char)t2 & 0xff; t2>>=8; 288 hash[j+2] = (char)t2 & 0xff; t2>>=8; 289 hash[j+1] = (char)t2 & 0xff; t2>>=8; 290 hash[j ] = (char)t2 & 0xff; 291 } 292 293 /* Zeroize sensitive information. */ 294 memset(sctx, 0, sizeof(struct sha512_ctx)); 295 } 296 297 static void sha384_final(void *ctx, u8 *hash) 298 { 299 struct sha512_ctx *sctx = ctx; 300 u8 D[64]; 301 302 sha512_final(sctx, D); 303 304 memcpy(hash, D, 48); 305 memset(D, 0, 64); 306 } 307 308 static struct crypto_alg sha512 = { 309 .cra_name = "sha512", 310 .cra_flags = CRYPTO_ALG_TYPE_DIGEST, 311 .cra_blocksize = SHA512_HMAC_BLOCK_SIZE, 312 .cra_ctxsize = sizeof(struct sha512_ctx), 313 .cra_module = THIS_MODULE, 314 .cra_list = LIST_HEAD_INIT(sha512.cra_list), 315 .cra_u = { .digest = { 316 .dia_digestsize = SHA512_DIGEST_SIZE, 317 .dia_init = sha512_init, 318 .dia_update = sha512_update, 319 .dia_final = sha512_final } 320 } 321 }; 322 323 static struct crypto_alg sha384 = { 324 .cra_name = "sha384", 325 .cra_flags = CRYPTO_ALG_TYPE_DIGEST, 326 .cra_blocksize = SHA384_HMAC_BLOCK_SIZE, 327 .cra_ctxsize = sizeof(struct sha512_ctx), 328 .cra_module = THIS_MODULE, 329 .cra_list = LIST_HEAD_INIT(sha384.cra_list), 330 .cra_u = { .digest = { 331 .dia_digestsize = SHA384_DIGEST_SIZE, 332 .dia_init = sha384_init, 333 .dia_update = sha512_update, 334 .dia_final = sha384_final } 335 } 336 }; 337 338 MODULE_ALIAS("sha384"); 339 340 static int __init init(void) 341 { 342 int ret = 0; 343 344 if ((ret = crypto_register_alg(&sha384)) < 0) 345 goto out; 346 if ((ret = crypto_register_alg(&sha512)) < 0) 347 crypto_unregister_alg(&sha384); 348 out: 349 return ret; 350 } 351 352 static void __exit fini(void) 353 { 354 crypto_unregister_alg(&sha384); 355 crypto_unregister_alg(&sha512); 356 } 357 358 module_init(init); 359 module_exit(fini); 360 361 MODULE_LICENSE("GPL"); 362 MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms"); 363