sha512_generic.c

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    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 const u64 sha512_K[80] = {
   35         0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
   36         0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
   37         0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
   38         0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
   39         0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
   40         0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
   41         0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
   42         0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
   43         0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
   44         0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
   45         0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
   46         0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
   47         0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
   48         0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
   49         0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
   50         0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
   51         0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
   52         0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
   53         0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
   54         0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
   55         0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
   56         0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
   57         0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
   58         0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
   59         0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
   60         0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
   61         0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
   62 };
   63 
   64 #define e0(x)       (ror64(x,28) ^ ror64(x,34) ^ ror64(x,39))
   65 #define e1(x)       (ror64(x,14) ^ ror64(x,18) ^ ror64(x,41))
   66 #define s0(x)       (ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7))
   67 #define s1(x)       (ror64(x,19) ^ ror64(x,61) ^ (x >> 6))
   68 
   69 static inline void LOAD_OP(int I, u64 *W, const u8 *input)
   70 {
   71         W[I] = __be64_to_cpu( ((__be64*)(input))[I] );
   72 }
   73 
   74 static inline void BLEND_OP(int I, u64 *W)
   75 {
   76         W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
   77 }
   78 
   79 static void
   80 sha512_transform(u64 *state, const u8 *input)
   81 {
   82         u64 a, b, c, d, e, f, g, h, t1, t2;
   83 
   84         int i;
   85         u64 W[16];
   86 
   87         /* load the state into our registers */
   88         a=state[0];   b=state[1];   c=state[2];   d=state[3];
   89         e=state[4];   f=state[5];   g=state[6];   h=state[7];
   90 
   91         /* now iterate */
   92         for (i=0; i<80; i+=8) {
   93                 if (!(i & 8)) {
   94                         int j;
   95 
   96                         if (i < 16) {
   97                                 /* load the input */
   98                                 for (j = 0; j < 16; j++)
   99                                         LOAD_OP(i + j, W, input);
  100                         } else {
  101                                 for (j = 0; j < 16; j++) {
  102                                         BLEND_OP(i + j, W);
  103                                 }
  104                         }
  105                 }
  106 
  107                 t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i  ] + W[(i & 15)];
  108                 t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
  109                 t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[(i & 15) + 1];
  110                 t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
  111                 t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[(i & 15) + 2];
  112                 t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
  113                 t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[(i & 15) + 3];
  114                 t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
  115                 t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[(i & 15) + 4];
  116                 t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
  117                 t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[(i & 15) + 5];
  118                 t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
  119                 t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[(i & 15) + 6];
  120                 t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
  121                 t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[(i & 15) + 7];
  122                 t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;
  123         }
  124 
  125         state[0] += a; state[1] += b; state[2] += c; state[3] += d;
  126         state[4] += e; state[5] += f; state[6] += g; state[7] += h;
  127 
  128         /* erase our data */
  129         a = b = c = d = e = f = g = h = t1 = t2 = 0;
  130 }
  131 
  132 static int
  133 sha512_init(struct shash_desc *desc)
  134 {
  135         struct sha512_state *sctx = shash_desc_ctx(desc);
  136         sctx->state[0] = SHA512_H0;
  137         sctx->state[1] = SHA512_H1;
  138         sctx->state[2] = SHA512_H2;
  139         sctx->state[3] = SHA512_H3;
  140         sctx->state[4] = SHA512_H4;
  141         sctx->state[5] = SHA512_H5;
  142         sctx->state[6] = SHA512_H6;
  143         sctx->state[7] = SHA512_H7;
  144         sctx->count[0] = sctx->count[1] = 0;
  145 
  146         return 0;
  147 }
  148 
  149 static int
  150 sha384_init(struct shash_desc *desc)
  151 {
  152         struct sha512_state *sctx = shash_desc_ctx(desc);
  153         sctx->state[0] = SHA384_H0;
  154         sctx->state[1] = SHA384_H1;
  155         sctx->state[2] = SHA384_H2;
  156         sctx->state[3] = SHA384_H3;
  157         sctx->state[4] = SHA384_H4;
  158         sctx->state[5] = SHA384_H5;
  159         sctx->state[6] = SHA384_H6;
  160         sctx->state[7] = SHA384_H7;
  161         sctx->count[0] = sctx->count[1] = 0;
  162 
  163         return 0;
  164 }
  165 
  166 static int
  167 sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len)
  168 {
  169         struct sha512_state *sctx = shash_desc_ctx(desc);
  170 
  171         unsigned int i, index, part_len;
  172 
  173         /* Compute number of bytes mod 128 */
  174         index = sctx->count[0] & 0x7f;
  175 
  176         /* Update number of bytes */
  177         if ((sctx->count[0] += len) < len)
  178                 sctx->count[1]++;
  179 
  180         part_len = 128 - index;
  181 
  182         /* Transform as many times as possible. */
  183         if (len >= part_len) {
  184                 memcpy(&sctx->buf[index], data, part_len);
  185                 sha512_transform(sctx->state, sctx->buf);
  186 
  187                 for (i = part_len; i + 127 < len; i+=128)
  188                         sha512_transform(sctx->state, &data[i]);
  189 
  190                 index = 0;
  191         } else {
  192                 i = 0;
  193         }
  194 
  195         /* Buffer remaining input */
  196         memcpy(&sctx->buf[index], &data[i], len - i);
  197 
  198         return 0;
  199 }
  200 
  201 static int
  202 sha512_final(struct shash_desc *desc, u8 *hash)
  203 {
  204         struct sha512_state *sctx = shash_desc_ctx(desc);
  205         static u8 padding[128] = { 0x80, };
  206         __be64 *dst = (__be64 *)hash;
  207         __be64 bits[2];
  208         unsigned int index, pad_len;
  209         int i;
  210 
  211         /* Save number of bits */
  212         bits[1] = cpu_to_be64(sctx->count[0] << 3);
  213         bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
  214 
  215         /* Pad out to 112 mod 128. */
  216         index = sctx->count[0] & 0x7f;
  217         pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
  218         sha512_update(desc, padding, pad_len);
  219 
  220         /* Append length (before padding) */
  221         sha512_update(desc, (const u8 *)bits, sizeof(bits));
  222 
  223         /* Store state in digest */
  224         for (i = 0; i < 8; i++)
  225                 dst[i] = cpu_to_be64(sctx->state[i]);
  226 
  227         /* Zeroize sensitive information. */
  228         memset(sctx, 0, sizeof(struct sha512_state));
  229 
  230         return 0;
  231 }
  232 
  233 static int sha384_final(struct shash_desc *desc, u8 *hash)
  234 {
  235         u8 D[64];
  236 
  237         sha512_final(desc, D);
  238 
  239         memcpy(hash, D, 48);
  240         memset(D, 0, 64);
  241 
  242         return 0;
  243 }
  244 
  245 static struct shash_alg sha512_algs[2] = { {
  246         .digestsize     =       SHA512_DIGEST_SIZE,
  247         .init           =       sha512_init,
  248         .update         =       sha512_update,
  249         .final          =       sha512_final,
  250         .descsize       =       sizeof(struct sha512_state),
  251         .base           =       {
  252                 .cra_name       =       "sha512",
  253                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
  254                 .cra_blocksize  =       SHA512_BLOCK_SIZE,
  255                 .cra_module     =       THIS_MODULE,
  256         }
  257 }, {
  258         .digestsize     =       SHA384_DIGEST_SIZE,
  259         .init           =       sha384_init,
  260         .update         =       sha512_update,
  261         .final          =       sha384_final,
  262         .descsize       =       sizeof(struct sha512_state),
  263         .base           =       {
  264                 .cra_name       =       "sha384",
  265                 .cra_flags      =       CRYPTO_ALG_TYPE_SHASH,
  266                 .cra_blocksize  =       SHA384_BLOCK_SIZE,
  267                 .cra_module     =       THIS_MODULE,
  268         }
  269 } };
  270 
  271 static int __init sha512_generic_mod_init(void)
  272 {
  273         return crypto_register_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
  274 }
  275 
  276 static void __exit sha512_generic_mod_fini(void)
  277 {
  278         crypto_unregister_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
  279 }
  280 
  281 module_init(sha512_generic_mod_init);
  282 module_exit(sha512_generic_mod_fini);
  283 
  284 MODULE_LICENSE("GPL");
  285 MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");
  286 
  287 MODULE_ALIAS("sha384");
  288 MODULE_ALIAS("sha512");
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FreeBSD/Linux Kernel Cross Reference sys/crypto/sha512_generic.c

FreeBSD/Linux Kernel Cross Reference
sys/crypto/sha512_generic.c
