linux/crypto/sha512_generic.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/* SHA-512 code by Jean-Luc Cooke <jlcooke@certainkey.com>
   3 *
   4 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
   5 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
   6 * Copyright (c) 2003 Kyle McMartin <kyle@debian.org>
   7 */
   8#include <crypto/internal/hash.h>
   9#include <linux/kernel.h>
  10#include <linux/module.h>
  11#include <linux/mm.h>
  12#include <linux/init.h>
  13#include <linux/crypto.h>
  14#include <linux/types.h>
  15#include <crypto/sha2.h>
  16#include <crypto/sha512_base.h>
  17#include <linux/percpu.h>
  18#include <asm/byteorder.h>
  19#include <asm/unaligned.h>
  20
  21const u8 sha384_zero_message_hash[SHA384_DIGEST_SIZE] = {
  22        0x38, 0xb0, 0x60, 0xa7, 0x51, 0xac, 0x96, 0x38,
  23        0x4c, 0xd9, 0x32, 0x7e, 0xb1, 0xb1, 0xe3, 0x6a,
  24        0x21, 0xfd, 0xb7, 0x11, 0x14, 0xbe, 0x07, 0x43,
  25        0x4c, 0x0c, 0xc7, 0xbf, 0x63, 0xf6, 0xe1, 0xda,
  26        0x27, 0x4e, 0xde, 0xbf, 0xe7, 0x6f, 0x65, 0xfb,
  27        0xd5, 0x1a, 0xd2, 0xf1, 0x48, 0x98, 0xb9, 0x5b
  28};
  29EXPORT_SYMBOL_GPL(sha384_zero_message_hash);
  30
  31const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE] = {
  32        0xcf, 0x83, 0xe1, 0x35, 0x7e, 0xef, 0xb8, 0xbd,
  33        0xf1, 0x54, 0x28, 0x50, 0xd6, 0x6d, 0x80, 0x07,
  34        0xd6, 0x20, 0xe4, 0x05, 0x0b, 0x57, 0x15, 0xdc,
  35        0x83, 0xf4, 0xa9, 0x21, 0xd3, 0x6c, 0xe9, 0xce,
  36        0x47, 0xd0, 0xd1, 0x3c, 0x5d, 0x85, 0xf2, 0xb0,
  37        0xff, 0x83, 0x18, 0xd2, 0x87, 0x7e, 0xec, 0x2f,
  38        0x63, 0xb9, 0x31, 0xbd, 0x47, 0x41, 0x7a, 0x81,
  39        0xa5, 0x38, 0x32, 0x7a, 0xf9, 0x27, 0xda, 0x3e
  40};
  41EXPORT_SYMBOL_GPL(sha512_zero_message_hash);
  42
  43static inline u64 Ch(u64 x, u64 y, u64 z)
  44{
  45        return z ^ (x & (y ^ z));
  46}
  47
  48static inline u64 Maj(u64 x, u64 y, u64 z)
  49{
  50        return (x & y) | (z & (x | y));
  51}
  52
  53static const u64 sha512_K[80] = {
  54        0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
  55        0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
  56        0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
  57        0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
  58        0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
  59        0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
  60        0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
  61        0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
  62        0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
  63        0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
  64        0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
  65        0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
  66        0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
  67        0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
  68        0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
  69        0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
  70        0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
  71        0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
  72        0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
  73        0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
  74        0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
  75        0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
  76        0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
  77        0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
  78        0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
  79        0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
  80        0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
  81};
  82
  83#define e0(x)       (ror64(x,28) ^ ror64(x,34) ^ ror64(x,39))
  84#define e1(x)       (ror64(x,14) ^ ror64(x,18) ^ ror64(x,41))
  85#define s0(x)       (ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7))
  86#define s1(x)       (ror64(x,19) ^ ror64(x,61) ^ (x >> 6))
  87
  88static inline void LOAD_OP(int I, u64 *W, const u8 *input)
  89{
  90        W[I] = get_unaligned_be64((__u64 *)input + I);
  91}
  92
  93static inline void BLEND_OP(int I, u64 *W)
  94{
  95        W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
  96}
  97
  98static void
  99sha512_transform(u64 *state, const u8 *input)
 100{
 101        u64 a, b, c, d, e, f, g, h, t1, t2;
 102
 103        int i;
 104        u64 W[16];
 105
 106        /* load the state into our registers */
 107        a=state[0];   b=state[1];   c=state[2];   d=state[3];
 108        e=state[4];   f=state[5];   g=state[6];   h=state[7];
 109
 110        /* now iterate */
 111        for (i=0; i<80; i+=8) {
 112                if (!(i & 8)) {
 113                        int j;
 114
 115                        if (i < 16) {
 116                                /* load the input */
 117                                for (j = 0; j < 16; j++)
 118                                        LOAD_OP(i + j, W, input);
 119                        } else {
 120                                for (j = 0; j < 16; j++) {
 121                                        BLEND_OP(i + j, W);
 122                                }
 123                        }
 124                }
 125
 126                t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i  ] + W[(i & 15)];
 127                t2 = e0(a) + Maj(a,b,c);    d+=t1;    h=t1+t2;
 128                t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[(i & 15) + 1];
 129                t2 = e0(h) + Maj(h,a,b);    c+=t1;    g=t1+t2;
 130                t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[(i & 15) + 2];
 131                t2 = e0(g) + Maj(g,h,a);    b+=t1;    f=t1+t2;
 132                t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[(i & 15) + 3];
 133                t2 = e0(f) + Maj(f,g,h);    a+=t1;    e=t1+t2;
 134                t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[(i & 15) + 4];
 135                t2 = e0(e) + Maj(e,f,g);    h+=t1;    d=t1+t2;
 136                t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[(i & 15) + 5];
 137                t2 = e0(d) + Maj(d,e,f);    g+=t1;    c=t1+t2;
 138                t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[(i & 15) + 6];
 139                t2 = e0(c) + Maj(c,d,e);    f+=t1;    b=t1+t2;
 140                t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[(i & 15) + 7];
 141                t2 = e0(b) + Maj(b,c,d);    e+=t1;    a=t1+t2;
 142        }
 143
 144        state[0] += a; state[1] += b; state[2] += c; state[3] += d;
 145        state[4] += e; state[5] += f; state[6] += g; state[7] += h;
 146
 147        /* erase our data */
 148        a = b = c = d = e = f = g = h = t1 = t2 = 0;
 149}
 150
 151static void sha512_generic_block_fn(struct sha512_state *sst, u8 const *src,
 152                                    int blocks)
 153{
 154        while (blocks--) {
 155                sha512_transform(sst->state, src);
 156                src += SHA512_BLOCK_SIZE;
 157        }
 158}
 159
 160int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
 161                        unsigned int len)
 162{
 163        return sha512_base_do_update(desc, data, len, sha512_generic_block_fn);
 164}
 165EXPORT_SYMBOL(crypto_sha512_update);
 166
 167static int sha512_final(struct shash_desc *desc, u8 *hash)
 168{
 169        sha512_base_do_finalize(desc, sha512_generic_block_fn);
 170        return sha512_base_finish(desc, hash);
 171}
 172
 173int crypto_sha512_finup(struct shash_desc *desc, const u8 *data,
 174                        unsigned int len, u8 *hash)
 175{
 176        sha512_base_do_update(desc, data, len, sha512_generic_block_fn);
 177        return sha512_final(desc, hash);
 178}
 179EXPORT_SYMBOL(crypto_sha512_finup);
 180
 181static struct shash_alg sha512_algs[2] = { {
 182        .digestsize     =       SHA512_DIGEST_SIZE,
 183        .init           =       sha512_base_init,
 184        .update         =       crypto_sha512_update,
 185        .final          =       sha512_final,
 186        .finup          =       crypto_sha512_finup,
 187        .descsize       =       sizeof(struct sha512_state),
 188        .base           =       {
 189                .cra_name       =       "sha512",
 190                .cra_driver_name =      "sha512-generic",
 191                .cra_priority   =       100,
 192                .cra_blocksize  =       SHA512_BLOCK_SIZE,
 193                .cra_module     =       THIS_MODULE,
 194        }
 195}, {
 196        .digestsize     =       SHA384_DIGEST_SIZE,
 197        .init           =       sha384_base_init,
 198        .update         =       crypto_sha512_update,
 199        .final          =       sha512_final,
 200        .finup          =       crypto_sha512_finup,
 201        .descsize       =       sizeof(struct sha512_state),
 202        .base           =       {
 203                .cra_name       =       "sha384",
 204                .cra_driver_name =      "sha384-generic",
 205                .cra_priority   =       100,
 206                .cra_blocksize  =       SHA384_BLOCK_SIZE,
 207                .cra_module     =       THIS_MODULE,
 208        }
 209} };
 210
 211static int __init sha512_generic_mod_init(void)
 212{
 213        return crypto_register_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
 214}
 215
 216static void __exit sha512_generic_mod_fini(void)
 217{
 218        crypto_unregister_shashes(sha512_algs, ARRAY_SIZE(sha512_algs));
 219}
 220
 221subsys_initcall(sha512_generic_mod_init);
 222module_exit(sha512_generic_mod_fini);
 223
 224MODULE_LICENSE("GPL");
 225MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");
 226
 227MODULE_ALIAS_CRYPTO("sha384");
 228MODULE_ALIAS_CRYPTO("sha384-generic");
 229MODULE_ALIAS_CRYPTO("sha512");
 230MODULE_ALIAS_CRYPTO("sha512-generic");
 231
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