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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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 */
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +110013#include <crypto/internal/hash.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/kernel.h>
15#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/mm.h>
17#include <linux/init.h>
18#include <linux/crypto.h>
Herbert Xu06ace7a2005-10-30 21:25:15 +110019#include <linux/types.h>
Jan Glauber5265eeb2007-10-09 22:43:13 +080020#include <crypto/sha.h>
Adrian-Ken Rueegseggerf9e2bca2008-12-17 16:47:52 +110021#include <linux/percpu.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <asm/byteorder.h>
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024static inline u64 Ch(u64 x, u64 y, u64 z)
25{
26 return z ^ (x & (y ^ z));
27}
28
29static inline u64 Maj(u64 x, u64 y, u64 z)
30{
31 return (x & y) | (z & (x | y));
32}
33
Linus Torvalds1da177e2005-04-16 15:20:36 -070034static 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
Alexey Dobriyanf2ea0f52012-01-14 21:44:49 +030064#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))
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Linus Torvalds1da177e2005-04-16 15:20:36 -070069static inline void LOAD_OP(int I, u64 *W, const u8 *input)
70{
71 W[I] = __be64_to_cpu( ((__be64*)(input))[I] );
72}
73
74static inline void BLEND_OP(int I, u64 *W)
75{
Herbert Xu58d7d182012-01-26 15:03:16 +110076 W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077}
78
79static void
Adrian-Ken Rueegseggerf9e2bca2008-12-17 16:47:52 +110080sha512_transform(u64 *state, const u8 *input)
Linus Torvalds1da177e2005-04-16 15:20:36 -070081{
82 u64 a, b, c, d, e, f, g, h, t1, t2;
83
84 int i;
Alexey Dobriyan51fc6dc2012-01-14 21:40:57 +030085 u64 W[16];
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 /* load the state into our registers */
Jan Glauber78f8b3a2008-03-06 19:55:38 +080088 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
Herbert Xu3a92d682012-02-05 15:09:28 +110091 /* now iterate */
92 for (i=0; i<80; i+=8) {
93 if (!(i & 8)) {
94 int j;
Alexey Dobriyan51fc6dc2012-01-14 21:40:57 +030095
Herbert Xu3a92d682012-02-05 15:09:28 +110096 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 }
Alexey Dobriyan51fc6dc2012-01-14 21:40:57 +0300106
Herbert Xu3a92d682012-02-05 15:09:28 +1100107 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 }
Jan Glauber78f8b3a2008-03-06 19:55:38 +0800124
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
128 /* erase our data */
129 a = b = c = d = e = f = g = h = t1 = t2 = 0;
130}
131
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100132static int
133sha512_init(struct shash_desc *desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134{
Herbert Xu1f38ad82009-07-22 11:48:18 +0800135 struct sha512_state *sctx = shash_desc_ctx(desc);
Jan Glauber5265eeb2007-10-09 22:43:13 +0800136 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;
Herbert Xu13887ed2009-07-22 12:22:43 +0800144 sctx->count[0] = sctx->count[1] = 0;
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100145
146 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147}
148
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100149static int
150sha384_init(struct shash_desc *desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151{
Herbert Xu1f38ad82009-07-22 11:48:18 +0800152 struct sha512_state *sctx = shash_desc_ctx(desc);
Jan Glauber5265eeb2007-10-09 22:43:13 +0800153 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;
Herbert Xu13887ed2009-07-22 12:22:43 +0800161 sctx->count[0] = sctx->count[1] = 0;
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100162
163 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164}
165
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100166static int
167sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168{
Herbert Xu1f38ad82009-07-22 11:48:18 +0800169 struct sha512_state *sctx = shash_desc_ctx(desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171 unsigned int i, index, part_len;
172
173 /* Compute number of bytes mod 128 */
Herbert Xu13887ed2009-07-22 12:22:43 +0800174 index = sctx->count[0] & 0x7f;
Jan Glauber78f8b3a2008-03-06 19:55:38 +0800175
Herbert Xu13887ed2009-07-22 12:22:43 +0800176 /* Update number of bytes */
177 if (!(sctx->count[0] += len))
178 sctx->count[1]++;
Jan Glauber78f8b3a2008-03-06 19:55:38 +0800179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 part_len = 128 - index;
Jan Glauber78f8b3a2008-03-06 19:55:38 +0800181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 /* Transform as many times as possible. */
183 if (len >= part_len) {
184 memcpy(&sctx->buf[index], data, part_len);
Adrian-Ken Rueegseggerf9e2bca2008-12-17 16:47:52 +1100185 sha512_transform(sctx->state, sctx->buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
187 for (i = part_len; i + 127 < len; i+=128)
Adrian-Ken Rueegseggerf9e2bca2008-12-17 16:47:52 +1100188 sha512_transform(sctx->state, &data[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190 index = 0;
191 } else {
192 i = 0;
193 }
194
195 /* Buffer remaining input */
196 memcpy(&sctx->buf[index], &data[i], len - i);
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100197
198 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199}
200
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100201static int
202sha512_final(struct shash_desc *desc, u8 *hash)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203{
Herbert Xu1f38ad82009-07-22 11:48:18 +0800204 struct sha512_state *sctx = shash_desc_ctx(desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 static u8 padding[128] = { 0x80, };
Herbert Xu06ace7a2005-10-30 21:25:15 +1100206 __be64 *dst = (__be64 *)hash;
Herbert Xu13887ed2009-07-22 12:22:43 +0800207 __be64 bits[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 unsigned int index, pad_len;
Herbert Xu06ace7a2005-10-30 21:25:15 +1100209 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211 /* Save number of bits */
Herbert Xu13887ed2009-07-22 12:22:43 +0800212 bits[1] = cpu_to_be64(sctx->count[0] << 3);
213 bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
215 /* Pad out to 112 mod 128. */
Herbert Xu13887ed2009-07-22 12:22:43 +0800216 index = sctx->count[0] & 0x7f;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100218 sha512_update(desc, padding, pad_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
220 /* Append length (before padding) */
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100221 sha512_update(desc, (const u8 *)bits, sizeof(bits));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
223 /* Store state in digest */
Herbert Xu06ace7a2005-10-30 21:25:15 +1100224 for (i = 0; i < 8; i++)
225 dst[i] = cpu_to_be64(sctx->state[i]);
226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 /* Zeroize sensitive information. */
Herbert Xu1f38ad82009-07-22 11:48:18 +0800228 memset(sctx, 0, sizeof(struct sha512_state));
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100229
230 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231}
232
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100233static int sha384_final(struct shash_desc *desc, u8 *hash)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234{
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100235 u8 D[64];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100237 sha512_final(desc, D);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100239 memcpy(hash, D, 48);
240 memset(D, 0, 64);
241
242 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243}
244
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100245static struct shash_alg sha512 = {
246 .digestsize = SHA512_DIGEST_SIZE,
247 .init = sha512_init,
248 .update = sha512_update,
249 .final = sha512_final,
Herbert Xu1f38ad82009-07-22 11:48:18 +0800250 .descsize = sizeof(struct sha512_state),
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100251 .base = {
252 .cra_name = "sha512",
253 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
254 .cra_blocksize = SHA512_BLOCK_SIZE,
255 .cra_module = THIS_MODULE,
256 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257};
258
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100259static struct shash_alg sha384 = {
260 .digestsize = SHA384_DIGEST_SIZE,
261 .init = sha384_init,
262 .update = sha512_update,
263 .final = sha384_final,
Herbert Xu1f38ad82009-07-22 11:48:18 +0800264 .descsize = sizeof(struct sha512_state),
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100265 .base = {
266 .cra_name = "sha384",
267 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
268 .cra_blocksize = SHA384_BLOCK_SIZE,
269 .cra_module = THIS_MODULE,
270 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271};
272
Kamalesh Babulal3af5b902008-04-05 21:00:57 +0800273static int __init sha512_generic_mod_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274{
275 int ret = 0;
276
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100277 if ((ret = crypto_register_shash(&sha384)) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 goto out;
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100279 if ((ret = crypto_register_shash(&sha512)) < 0)
280 crypto_unregister_shash(&sha384);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281out:
282 return ret;
283}
284
Kamalesh Babulal3af5b902008-04-05 21:00:57 +0800285static void __exit sha512_generic_mod_fini(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286{
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100287 crypto_unregister_shash(&sha384);
288 crypto_unregister_shash(&sha512);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289}
290
Kamalesh Babulal3af5b902008-04-05 21:00:57 +0800291module_init(sha512_generic_mod_init);
292module_exit(sha512_generic_mod_fini);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
294MODULE_LICENSE("GPL");
295MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");
Jan Glauber78f8b3a2008-03-06 19:55:38 +0800296
297MODULE_ALIAS("sha384");
298MODULE_ALIAS("sha512");