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 #include <linux/types.h> 21 22 #include <asm/scatterlist.h> 23 #include <asm/byteorder.h> 24 25 #define SHA384_DIGEST_SIZE 48 26 #define SHA512_DIGEST_SIZE 64 27 #define SHA384_HMAC_BLOCK_SIZE 96 28 #define SHA512_HMAC_BLOCK_SIZE 128 29 30 struct sha512_ctx { 31 u64 state[8]; 32 u32 count[4]; 33 u8 buf[128]; 34 u64 W[80]; 35 }; 36 37 static inline u64 Ch(u64 x, u64 y, u64 z) 38 { 39 return z ^ (x & (y ^ z)); 40 } 41 42 static inline u64 Maj(u64 x, u64 y, u64 z) 43 { 44 return (x & y) | (z & (x | y)); 45 } 46 47 static inline u64 RORu64(u64 x, u64 y) 48 { 49 return (x >> y) | (x << (64 - y)); 50 } 51 52 static const u64 sha512_K[80] = { 53 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 54 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 55 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, 56 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 57 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 58 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 59 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, 60 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 61 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 62 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 63 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, 64 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 65 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 66 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 67 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, 68 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 69 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 70 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 71 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, 72 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 73 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 74 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 75 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, 76 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 77 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 78 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 79 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL, 80 }; 81 82 #define e0(x) (RORu64(x,28) ^ RORu64(x,34) ^ RORu64(x,39)) 83 #define e1(x) (RORu64(x,14) ^ RORu64(x,18) ^ RORu64(x,41)) 84 #define s0(x) (RORu64(x, 1) ^ RORu64(x, 8) ^ (x >> 7)) 85 #define s1(x) (RORu64(x,19) ^ RORu64(x,61) ^ (x >> 6)) 86 87 /* H* initial state for SHA-512 */ 88 #define H0 0x6a09e667f3bcc908ULL 89 #define H1 0xbb67ae8584caa73bULL 90 #define H2 0x3c6ef372fe94f82bULL 91 #define H3 0xa54ff53a5f1d36f1ULL 92 #define H4 0x510e527fade682d1ULL 93 #define H5 0x9b05688c2b3e6c1fULL 94 #define H6 0x1f83d9abfb41bd6bULL 95 #define H7 0x5be0cd19137e2179ULL 96 97 /* H'* initial state for SHA-384 */ 98 #define HP0 0xcbbb9d5dc1059ed8ULL 99 #define HP1 0x629a292a367cd507ULL 100 #define HP2 0x9159015a3070dd17ULL 101 #define HP3 0x152fecd8f70e5939ULL 102 #define HP4 0x67332667ffc00b31ULL 103 #define HP5 0x8eb44a8768581511ULL 104 #define HP6 0xdb0c2e0d64f98fa7ULL 105 #define HP7 0x47b5481dbefa4fa4ULL 106 107 static inline void LOAD_OP(int I, u64 *W, const u8 *input) 108 { 109 W[I] = __be64_to_cpu( ((__be64*)(input))[I] ); 110 } 111 112 static inline void BLEND_OP(int I, u64 *W) 113 { 114 W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; 115 } 116 117 static void 118 sha512_transform(u64 *state, u64 *W, const u8 *input) 119 { 120 u64 a, b, c, d, e, f, g, h, t1, t2; 121 122 int i; 123 124 /* load the input */ 125 for (i = 0; i < 16; i++) 126 LOAD_OP(i, W, input); 127 128 for (i = 16; i < 80; i++) { 129 BLEND_OP(i, W); 130 } 131 132 /* load the state into our registers */ 133 a=state[0]; b=state[1]; c=state[2]; d=state[3]; 134 e=state[4]; f=state[5]; g=state[6]; h=state[7]; 135 136 /* now iterate */ 137 for (i=0; i<80; i+=8) { 138 t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[i ]; 139 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 140 t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[i+1]; 141 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 142 t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[i+2]; 143 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 144 t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[i+3]; 145 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 146 t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[i+4]; 147 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 148 t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[i+5]; 149 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 150 t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[i+6]; 151 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 152 t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[i+7]; 153 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 154 } 155 156 state[0] += a; state[1] += b; state[2] += c; state[3] += d; 157 state[4] += e; state[5] += f; state[6] += g; state[7] += h; 158 159 /* erase our data */ 160 a = b = c = d = e = f = g = h = t1 = t2 = 0; 161 } 162 163 static void 164 sha512_init(void *ctx) 165 { 166 struct sha512_ctx *sctx = ctx; 167 sctx->state[0] = H0; 168 sctx->state[1] = H1; 169 sctx->state[2] = H2; 170 sctx->state[3] = H3; 171 sctx->state[4] = H4; 172 sctx->state[5] = H5; 173 sctx->state[6] = H6; 174 sctx->state[7] = H7; 175 sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; 176 memset(sctx->buf, 0, sizeof(sctx->buf)); 177 } 178 179 static void 180 sha384_init(void *ctx) 181 { 182 struct sha512_ctx *sctx = ctx; 183 sctx->state[0] = HP0; 184 sctx->state[1] = HP1; 185 sctx->state[2] = HP2; 186 sctx->state[3] = HP3; 187 sctx->state[4] = HP4; 188 sctx->state[5] = HP5; 189 sctx->state[6] = HP6; 190 sctx->state[7] = HP7; 191 sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; 192 memset(sctx->buf, 0, sizeof(sctx->buf)); 193 } 194 195 static void 196 sha512_update(void *ctx, const u8 *data, unsigned int len) 197 { 198 struct sha512_ctx *sctx = ctx; 199 200 unsigned int i, index, part_len; 201 202 /* Compute number of bytes mod 128 */ 203 index = (unsigned int)((sctx->count[0] >> 3) & 0x7F); 204 205 /* Update number of bits */ 206 if ((sctx->count[0] += (len << 3)) < (len << 3)) { 207 if ((sctx->count[1] += 1) < 1) 208 if ((sctx->count[2] += 1) < 1) 209 sctx->count[3]++; 210 sctx->count[1] += (len >> 29); 211 } 212 213 part_len = 128 - index; 214 215 /* Transform as many times as possible. */ 216 if (len >= part_len) { 217 memcpy(&sctx->buf[index], data, part_len); 218 sha512_transform(sctx->state, sctx->W, sctx->buf); 219 220 for (i = part_len; i + 127 < len; i+=128) 221 sha512_transform(sctx->state, sctx->W, &data[i]); 222 223 index = 0; 224 } else { 225 i = 0; 226 } 227 228 /* Buffer remaining input */ 229 memcpy(&sctx->buf[index], &data[i], len - i); 230 231 /* erase our data */ 232 memset(sctx->W, 0, sizeof(sctx->W)); 233 } 234 235 static void 236 sha512_final(void *ctx, u8 *hash) 237 { 238 struct sha512_ctx *sctx = ctx; 239 static u8 padding[128] = { 0x80, }; 240 __be64 *dst = (__be64 *)hash; 241 __be32 bits[4]; 242 unsigned int index, pad_len; 243 int i; 244 245 /* Save number of bits */ 246 bits[3] = cpu_to_be32(sctx->count[0]); 247 bits[2] = cpu_to_be32(sctx->count[1]); 248 bits[1] = cpu_to_be32(sctx->count[2]); 249 bits[0] = cpu_to_be32(sctx->count[3]); 250 251 /* Pad out to 112 mod 128. */ 252 index = (sctx->count[0] >> 3) & 0x7f; 253 pad_len = (index < 112) ? (112 - index) : ((128+112) - index); 254 sha512_update(sctx, padding, pad_len); 255 256 /* Append length (before padding) */ 257 sha512_update(sctx, (const u8 *)bits, sizeof(bits)); 258 259 /* Store state in digest */ 260 for (i = 0; i < 8; i++) 261 dst[i] = cpu_to_be64(sctx->state[i]); 262 263 /* Zeroize sensitive information. */ 264 memset(sctx, 0, sizeof(struct sha512_ctx)); 265 } 266 267 static void sha384_final(void *ctx, u8 *hash) 268 { 269 struct sha512_ctx *sctx = ctx; 270 u8 D[64]; 271 272 sha512_final(sctx, D); 273 274 memcpy(hash, D, 48); 275 memset(D, 0, 64); 276 } 277 278 static struct crypto_alg sha512 = { 279 .cra_name = "sha512", 280 .cra_flags = CRYPTO_ALG_TYPE_DIGEST, 281 .cra_blocksize = SHA512_HMAC_BLOCK_SIZE, 282 .cra_ctxsize = sizeof(struct sha512_ctx), 283 .cra_module = THIS_MODULE, 284 .cra_list = LIST_HEAD_INIT(sha512.cra_list), 285 .cra_u = { .digest = { 286 .dia_digestsize = SHA512_DIGEST_SIZE, 287 .dia_init = sha512_init, 288 .dia_update = sha512_update, 289 .dia_final = sha512_final } 290 } 291 }; 292 293 static struct crypto_alg sha384 = { 294 .cra_name = "sha384", 295 .cra_flags = CRYPTO_ALG_TYPE_DIGEST, 296 .cra_blocksize = SHA384_HMAC_BLOCK_SIZE, 297 .cra_ctxsize = sizeof(struct sha512_ctx), 298 .cra_module = THIS_MODULE, 299 .cra_list = LIST_HEAD_INIT(sha384.cra_list), 300 .cra_u = { .digest = { 301 .dia_digestsize = SHA384_DIGEST_SIZE, 302 .dia_init = sha384_init, 303 .dia_update = sha512_update, 304 .dia_final = sha384_final } 305 } 306 }; 307 308 MODULE_ALIAS("sha384"); 309 310 static int __init init(void) 311 { 312 int ret = 0; 313 314 if ((ret = crypto_register_alg(&sha384)) < 0) 315 goto out; 316 if ((ret = crypto_register_alg(&sha512)) < 0) 317 crypto_unregister_alg(&sha384); 318 out: 319 return ret; 320 } 321 322 static void __exit fini(void) 323 { 324 crypto_unregister_alg(&sha384); 325 crypto_unregister_alg(&sha512); 326 } 327 328 module_init(init); 329 module_exit(fini); 330 331 MODULE_LICENSE("GPL"); 332 MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms"); 333