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 #include <asm/unaligned.h> 24 25 static inline u64 Ch(u64 x, u64 y, u64 z) 26 { 27 return z ^ (x & (y ^ z)); 28 } 29 30 static inline u64 Maj(u64 x, u64 y, u64 z) 31 { 32 return (x & y) | (z & (x | y)); 33 } 34 35 static const u64 sha512_K[80] = { 36 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 37 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 38 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, 39 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 40 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 41 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 42 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, 43 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 44 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 45 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 46 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, 47 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 48 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 49 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 50 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, 51 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 52 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 53 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 54 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, 55 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 56 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 57 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 58 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, 59 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 60 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 61 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 62 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL, 63 }; 64 65 #define e0(x) (ror64(x,28) ^ ror64(x,34) ^ ror64(x,39)) 66 #define e1(x) (ror64(x,14) ^ ror64(x,18) ^ ror64(x,41)) 67 #define s0(x) (ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7)) 68 #define s1(x) (ror64(x,19) ^ ror64(x,61) ^ (x >> 6)) 69 70 static inline void LOAD_OP(int I, u64 *W, const u8 *input) 71 { 72 W[I] = get_unaligned_be64((__u64 *)input + I); 73 } 74 75 static inline void BLEND_OP(int I, u64 *W) 76 { 77 W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]); 78 } 79 80 static void 81 sha512_transform(u64 *state, const u8 *input) 82 { 83 u64 a, b, c, d, e, f, g, h, t1, t2; 84 85 int i; 86 u64 W[16]; 87 88 /* load the state into our registers */ 89 a=state[0]; b=state[1]; c=state[2]; d=state[3]; 90 e=state[4]; f=state[5]; g=state[6]; h=state[7]; 91 92 /* now iterate */ 93 for (i=0; i<80; i+=8) { 94 if (!(i & 8)) { 95 int j; 96 97 if (i < 16) { 98 /* load the input */ 99 for (j = 0; j < 16; j++) 100 LOAD_OP(i + j, W, input); 101 } else { 102 for (j = 0; j < 16; j++) { 103 BLEND_OP(i + j, W); 104 } 105 } 106 } 107 108 t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[(i & 15)]; 109 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 110 t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[(i & 15) + 1]; 111 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 112 t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[(i & 15) + 2]; 113 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 114 t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[(i & 15) + 3]; 115 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 116 t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[(i & 15) + 4]; 117 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 118 t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[(i & 15) + 5]; 119 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 120 t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[(i & 15) + 6]; 121 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 122 t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[(i & 15) + 7]; 123 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 124 } 125 126 state[0] += a; state[1] += b; state[2] += c; state[3] += d; 127 state[4] += e; state[5] += f; state[6] += g; state[7] += h; 128 129 /* erase our data */ 130 a = b = c = d = e = f = g = h = t1 = t2 = 0; 131 } 132 133 static int 134 sha512_init(struct shash_desc *desc) 135 { 136 struct sha512_state *sctx = shash_desc_ctx(desc); 137 sctx->state[0] = SHA512_H0; 138 sctx->state[1] = SHA512_H1; 139 sctx->state[2] = SHA512_H2; 140 sctx->state[3] = SHA512_H3; 141 sctx->state[4] = SHA512_H4; 142 sctx->state[5] = SHA512_H5; 143 sctx->state[6] = SHA512_H6; 144 sctx->state[7] = SHA512_H7; 145 sctx->count[0] = sctx->count[1] = 0; 146 147 return 0; 148 } 149 150 static int 151 sha384_init(struct shash_desc *desc) 152 { 153 struct sha512_state *sctx = shash_desc_ctx(desc); 154 sctx->state[0] = SHA384_H0; 155 sctx->state[1] = SHA384_H1; 156 sctx->state[2] = SHA384_H2; 157 sctx->state[3] = SHA384_H3; 158 sctx->state[4] = SHA384_H4; 159 sctx->state[5] = SHA384_H5; 160 sctx->state[6] = SHA384_H6; 161 sctx->state[7] = SHA384_H7; 162 sctx->count[0] = sctx->count[1] = 0; 163 164 return 0; 165 } 166 167 int crypto_sha512_update(struct shash_desc *desc, const u8 *data, 168 unsigned int len) 169 { 170 struct sha512_state *sctx = shash_desc_ctx(desc); 171 172 unsigned int i, index, part_len; 173 174 /* Compute number of bytes mod 128 */ 175 index = sctx->count[0] & 0x7f; 176 177 /* Update number of bytes */ 178 if ((sctx->count[0] += len) < len) 179 sctx->count[1]++; 180 181 part_len = 128 - index; 182 183 /* Transform as many times as possible. */ 184 if (len >= part_len) { 185 memcpy(&sctx->buf[index], data, part_len); 186 sha512_transform(sctx->state, sctx->buf); 187 188 for (i = part_len; i + 127 < len; i+=128) 189 sha512_transform(sctx->state, &data[i]); 190 191 index = 0; 192 } else { 193 i = 0; 194 } 195 196 /* Buffer remaining input */ 197 memcpy(&sctx->buf[index], &data[i], len - i); 198 199 return 0; 200 } 201 EXPORT_SYMBOL(crypto_sha512_update); 202 203 static int 204 sha512_final(struct shash_desc *desc, u8 *hash) 205 { 206 struct sha512_state *sctx = shash_desc_ctx(desc); 207 static u8 padding[128] = { 0x80, }; 208 __be64 *dst = (__be64 *)hash; 209 __be64 bits[2]; 210 unsigned int index, pad_len; 211 int i; 212 213 /* Save number of bits */ 214 bits[1] = cpu_to_be64(sctx->count[0] << 3); 215 bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61); 216 217 /* Pad out to 112 mod 128. */ 218 index = sctx->count[0] & 0x7f; 219 pad_len = (index < 112) ? (112 - index) : ((128+112) - index); 220 crypto_sha512_update(desc, padding, pad_len); 221 222 /* Append length (before padding) */ 223 crypto_sha512_update(desc, (const u8 *)bits, sizeof(bits)); 224 225 /* Store state in digest */ 226 for (i = 0; i < 8; i++) 227 dst[i] = cpu_to_be64(sctx->state[i]); 228 229 /* Zeroize sensitive information. */ 230 memset(sctx, 0, sizeof(struct sha512_state)); 231 232 return 0; 233 } 234 235 static int sha384_final(struct shash_desc *desc, u8 *hash) 236 { 237 u8 D[64]; 238 239 sha512_final(desc, D); 240 241 memcpy(hash, D, 48); 242 memzero_explicit(D, 64); 243 244 return 0; 245 } 246 247 static struct shash_alg sha512_algs[2] = { { 248 .digestsize = SHA512_DIGEST_SIZE, 249 .init = sha512_init, 250 .update = crypto_sha512_update, 251 .final = sha512_final, 252 .descsize = sizeof(struct sha512_state), 253 .base = { 254 .cra_name = "sha512", 255 .cra_driver_name = "sha512-generic", 256 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 257 .cra_blocksize = SHA512_BLOCK_SIZE, 258 .cra_module = THIS_MODULE, 259 } 260 }, { 261 .digestsize = SHA384_DIGEST_SIZE, 262 .init = sha384_init, 263 .update = crypto_sha512_update, 264 .final = sha384_final, 265 .descsize = sizeof(struct sha512_state), 266 .base = { 267 .cra_name = "sha384", 268 .cra_driver_name = "sha384-generic", 269 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 270 .cra_blocksize = SHA384_BLOCK_SIZE, 271 .cra_module = THIS_MODULE, 272 } 273 } }; 274 275 static int __init sha512_generic_mod_init(void) 276 { 277 return crypto_register_shashes(sha512_algs, ARRAY_SIZE(sha512_algs)); 278 } 279 280 static void __exit sha512_generic_mod_fini(void) 281 { 282 crypto_unregister_shashes(sha512_algs, ARRAY_SIZE(sha512_algs)); 283 } 284 285 module_init(sha512_generic_mod_init); 286 module_exit(sha512_generic_mod_fini); 287 288 MODULE_LICENSE("GPL"); 289 MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms"); 290 291 MODULE_ALIAS("sha384"); 292 MODULE_ALIAS("sha512"); 293