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 128 28#define SHA512_HMAC_BLOCK_SIZE 128 29 30struct sha512_ctx { 31 u64 state[8]; 32 u32 count[4]; 33 u8 buf[128]; 34 u64 W[80]; 35}; 36 37static inline u64 Ch(u64 x, u64 y, u64 z) 38{ 39 return z ^ (x & (y ^ z)); 40} 41 42static inline u64 Maj(u64 x, u64 y, u64 z) 43{ 44 return (x & y) | (z & (x | y)); 45} 46 47static inline u64 RORu64(u64 x, u64 y) 48{ 49 return (x >> y) | (x << (64 - y)); 50} 51 52static 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 107static inline void LOAD_OP(int I, u64 *W, const u8 *input) 108{ 109 W[I] = __be64_to_cpu( ((__be64*)(input))[I] ); 110} 111 112static 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 117static void 118sha512_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 163static void 164sha512_init(struct crypto_tfm *tfm) 165{ 166 struct sha512_ctx *sctx = crypto_tfm_ctx(tfm); 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} 177 178static void 179sha384_init(struct crypto_tfm *tfm) 180{ 181 struct sha512_ctx *sctx = crypto_tfm_ctx(tfm); 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} 192 193static void 194sha512_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len) 195{ 196 struct sha512_ctx *sctx = crypto_tfm_ctx(tfm); 197 198 unsigned int i, index, part_len; 199 200 /* Compute number of bytes mod 128 */ 201 index = (unsigned int)((sctx->count[0] >> 3) & 0x7F); 202 203 /* Update number of bits */ 204 if ((sctx->count[0] += (len << 3)) < (len << 3)) { 205 if ((sctx->count[1] += 1) < 1) 206 if ((sctx->count[2] += 1) < 1) 207 sctx->count[3]++; 208 sctx->count[1] += (len >> 29); 209 } 210 211 part_len = 128 - index; 212 213 /* Transform as many times as possible. */ 214 if (len >= part_len) { 215 memcpy(&sctx->buf[index], data, part_len); 216 sha512_transform(sctx->state, sctx->W, sctx->buf); 217 218 for (i = part_len; i + 127 < len; i+=128) 219 sha512_transform(sctx->state, sctx->W, &data[i]); 220 221 index = 0; 222 } else { 223 i = 0; 224 } 225 226 /* Buffer remaining input */ 227 memcpy(&sctx->buf[index], &data[i], len - i); 228 229 /* erase our data */ 230 memset(sctx->W, 0, sizeof(sctx->W)); 231} 232 233static void 234sha512_final(struct crypto_tfm *tfm, u8 *hash) 235{ 236 struct sha512_ctx *sctx = crypto_tfm_ctx(tfm); 237 static u8 padding[128] = { 0x80, }; 238 __be64 *dst = (__be64 *)hash; 239 __be32 bits[4]; 240 unsigned int index, pad_len; 241 int i; 242 243 /* Save number of bits */ 244 bits[3] = cpu_to_be32(sctx->count[0]); 245 bits[2] = cpu_to_be32(sctx->count[1]); 246 bits[1] = cpu_to_be32(sctx->count[2]); 247 bits[0] = cpu_to_be32(sctx->count[3]); 248 249 /* Pad out to 112 mod 128. */ 250 index = (sctx->count[0] >> 3) & 0x7f; 251 pad_len = (index < 112) ? (112 - index) : ((128+112) - index); 252 sha512_update(tfm, padding, pad_len); 253 254 /* Append length (before padding) */ 255 sha512_update(tfm, (const u8 *)bits, sizeof(bits)); 256 257 /* Store state in digest */ 258 for (i = 0; i < 8; i++) 259 dst[i] = cpu_to_be64(sctx->state[i]); 260 261 /* Zeroize sensitive information. */ 262 memset(sctx, 0, sizeof(struct sha512_ctx)); 263} 264 265static void sha384_final(struct crypto_tfm *tfm, u8 *hash) 266{ 267 u8 D[64]; 268 269 sha512_final(tfm, D); 270 271 memcpy(hash, D, 48); 272 memset(D, 0, 64); 273} 274 275static struct crypto_alg sha512 = { 276 .cra_name = "sha512", 277 .cra_flags = CRYPTO_ALG_TYPE_DIGEST, 278 .cra_blocksize = SHA512_HMAC_BLOCK_SIZE, 279 .cra_ctxsize = sizeof(struct sha512_ctx), 280 .cra_module = THIS_MODULE, 281 .cra_alignmask = 3, 282 .cra_list = LIST_HEAD_INIT(sha512.cra_list), 283 .cra_u = { .digest = { 284 .dia_digestsize = SHA512_DIGEST_SIZE, 285 .dia_init = sha512_init, 286 .dia_update = sha512_update, 287 .dia_final = sha512_final } 288 } 289}; 290 291static struct crypto_alg sha384 = { 292 .cra_name = "sha384", 293 .cra_flags = CRYPTO_ALG_TYPE_DIGEST, 294 .cra_blocksize = SHA384_HMAC_BLOCK_SIZE, 295 .cra_ctxsize = sizeof(struct sha512_ctx), 296 .cra_alignmask = 3, 297 .cra_module = THIS_MODULE, 298 .cra_list = LIST_HEAD_INIT(sha384.cra_list), 299 .cra_u = { .digest = { 300 .dia_digestsize = SHA384_DIGEST_SIZE, 301 .dia_init = sha384_init, 302 .dia_update = sha512_update, 303 .dia_final = sha384_final } 304 } 305}; 306 307MODULE_ALIAS("sha384"); 308 309static int __init init(void) 310{ 311 int ret = 0; 312 313 if ((ret = crypto_register_alg(&sha384)) < 0) 314 goto out; 315 if ((ret = crypto_register_alg(&sha512)) < 0) 316 crypto_unregister_alg(&sha384); 317out: 318 return ret; 319} 320 321static void __exit fini(void) 322{ 323 crypto_unregister_alg(&sha384); 324 crypto_unregister_alg(&sha512); 325} 326 327module_init(init); 328module_exit(fini); 329 330MODULE_LICENSE("GPL"); 331MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms"); 332