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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
34static inline u64 RORu64(u64 x, u64 y)
35{
36 return (x >> y) | (x << (64 - y));
37}
38
39static const u64 sha512_K[80] = {
40 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
41 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
42 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
43 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
44 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
45 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
46 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
47 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
48 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
49 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
50 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
51 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
52 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
53 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
54 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
55 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
56 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
57 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
58 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
59 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
60 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
61 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
62 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
63 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
64 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
65 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
66 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
67};
68
69#define e0(x) (RORu64(x,28) ^ RORu64(x,34) ^ RORu64(x,39))
70#define e1(x) (RORu64(x,14) ^ RORu64(x,18) ^ RORu64(x,41))
71#define s0(x) (RORu64(x, 1) ^ RORu64(x, 8) ^ (x >> 7))
72#define s1(x) (RORu64(x,19) ^ RORu64(x,61) ^ (x >> 6))
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074static inline void LOAD_OP(int I, u64 *W, const u8 *input)
75{
76 W[I] = __be64_to_cpu( ((__be64*)(input))[I] );
77}
78
79static inline void BLEND_OP(int I, u64 *W)
80{
Alexey Dobriyan51fc6dc2012-01-14 21:40:57 +030081 W[I % 16] += s1(W[(I-2) % 16]) + W[(I-7) % 16] + s0(W[(I-15) % 16]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082}
83
84static void
Adrian-Ken Rueegseggerf9e2bca2008-12-17 16:47:52 +110085sha512_transform(u64 *state, const u8 *input)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086{
87 u64 a, b, c, d, e, f, g, h, t1, t2;
88
89 int i;
Alexey Dobriyan51fc6dc2012-01-14 21:40:57 +030090 u64 W[16];
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 /* load the input */
93 for (i = 0; i < 16; i++)
94 LOAD_OP(i, W, input);
95
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 /* load the state into our registers */
Jan Glauber78f8b3a2008-03-06 19:55:38 +080097 a=state[0]; b=state[1]; c=state[2]; d=state[3];
98 e=state[4]; f=state[5]; g=state[6]; h=state[7];
99
Alexey Dobriyan51fc6dc2012-01-14 21:40:57 +0300100#define SHA512_0_15(i, a, b, c, d, e, f, g, h) \
101 t1 = h + e1(e) + Ch(e, f, g) + sha512_K[i] + W[i]; \
102 t2 = e0(a) + Maj(a, b, c); \
103 d += t1; \
104 h = t1 + t2
105
106#define SHA512_16_79(i, a, b, c, d, e, f, g, h) \
107 BLEND_OP(i, W); \
108 t1 = h + e1(e) + Ch(e, f, g) + sha512_K[i] + W[(i)%16]; \
109 t2 = e0(a) + Maj(a, b, c); \
110 d += t1; \
111 h = t1 + t2
112
113 for (i = 0; i < 16; i += 8) {
114 SHA512_0_15(i, a, b, c, d, e, f, g, h);
115 SHA512_0_15(i + 1, h, a, b, c, d, e, f, g);
116 SHA512_0_15(i + 2, g, h, a, b, c, d, e, f);
117 SHA512_0_15(i + 3, f, g, h, a, b, c, d, e);
118 SHA512_0_15(i + 4, e, f, g, h, a, b, c, d);
119 SHA512_0_15(i + 5, d, e, f, g, h, a, b, c);
120 SHA512_0_15(i + 6, c, d, e, f, g, h, a, b);
121 SHA512_0_15(i + 7, b, c, d, e, f, g, h, a);
122 }
123 for (i = 16; i < 80; i += 8) {
124 SHA512_16_79(i, a, b, c, d, e, f, g, h);
125 SHA512_16_79(i + 1, h, a, b, c, d, e, f, g);
126 SHA512_16_79(i + 2, g, h, a, b, c, d, e, f);
127 SHA512_16_79(i + 3, f, g, h, a, b, c, d, e);
128 SHA512_16_79(i + 4, e, f, g, h, a, b, c, d);
129 SHA512_16_79(i + 5, d, e, f, g, h, a, b, c);
130 SHA512_16_79(i + 6, c, d, e, f, g, h, a, b);
131 SHA512_16_79(i + 7, b, c, d, e, f, g, h, a);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 }
Jan Glauber78f8b3a2008-03-06 19:55:38 +0800133
134 state[0] += a; state[1] += b; state[2] += c; state[3] += d;
135 state[4] += e; state[5] += f; state[6] += g; state[7] += h;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137 /* erase our data */
138 a = b = c = d = e = f = g = h = t1 = t2 = 0;
139}
140
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100141static int
142sha512_init(struct shash_desc *desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143{
Herbert Xu1f38ad82009-07-22 11:48:18 +0800144 struct sha512_state *sctx = shash_desc_ctx(desc);
Jan Glauber5265eeb2007-10-09 22:43:13 +0800145 sctx->state[0] = SHA512_H0;
146 sctx->state[1] = SHA512_H1;
147 sctx->state[2] = SHA512_H2;
148 sctx->state[3] = SHA512_H3;
149 sctx->state[4] = SHA512_H4;
150 sctx->state[5] = SHA512_H5;
151 sctx->state[6] = SHA512_H6;
152 sctx->state[7] = SHA512_H7;
Herbert Xu13887ed2009-07-22 12:22:43 +0800153 sctx->count[0] = sctx->count[1] = 0;
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100154
155 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156}
157
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100158static int
159sha384_init(struct shash_desc *desc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160{
Herbert Xu1f38ad82009-07-22 11:48:18 +0800161 struct sha512_state *sctx = shash_desc_ctx(desc);
Jan Glauber5265eeb2007-10-09 22:43:13 +0800162 sctx->state[0] = SHA384_H0;
163 sctx->state[1] = SHA384_H1;
164 sctx->state[2] = SHA384_H2;
165 sctx->state[3] = SHA384_H3;
166 sctx->state[4] = SHA384_H4;
167 sctx->state[5] = SHA384_H5;
168 sctx->state[6] = SHA384_H6;
169 sctx->state[7] = SHA384_H7;
Herbert Xu13887ed2009-07-22 12:22:43 +0800170 sctx->count[0] = sctx->count[1] = 0;
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100171
172 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173}
174
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100175static int
176sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177{
Herbert Xu1f38ad82009-07-22 11:48:18 +0800178 struct sha512_state *sctx = shash_desc_ctx(desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 unsigned int i, index, part_len;
181
182 /* Compute number of bytes mod 128 */
Herbert Xu13887ed2009-07-22 12:22:43 +0800183 index = sctx->count[0] & 0x7f;
Jan Glauber78f8b3a2008-03-06 19:55:38 +0800184
Herbert Xu13887ed2009-07-22 12:22:43 +0800185 /* Update number of bytes */
186 if (!(sctx->count[0] += len))
187 sctx->count[1]++;
Jan Glauber78f8b3a2008-03-06 19:55:38 +0800188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 part_len = 128 - index;
Jan Glauber78f8b3a2008-03-06 19:55:38 +0800190
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 /* Transform as many times as possible. */
192 if (len >= part_len) {
193 memcpy(&sctx->buf[index], data, part_len);
Adrian-Ken Rueegseggerf9e2bca2008-12-17 16:47:52 +1100194 sha512_transform(sctx->state, sctx->buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196 for (i = part_len; i + 127 < len; i+=128)
Adrian-Ken Rueegseggerf9e2bca2008-12-17 16:47:52 +1100197 sha512_transform(sctx->state, &data[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
199 index = 0;
200 } else {
201 i = 0;
202 }
203
204 /* Buffer remaining input */
205 memcpy(&sctx->buf[index], &data[i], len - i);
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100206
207 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208}
209
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100210static int
211sha512_final(struct shash_desc *desc, u8 *hash)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
Herbert Xu1f38ad82009-07-22 11:48:18 +0800213 struct sha512_state *sctx = shash_desc_ctx(desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 static u8 padding[128] = { 0x80, };
Herbert Xu06ace7a2005-10-30 21:25:15 +1100215 __be64 *dst = (__be64 *)hash;
Herbert Xu13887ed2009-07-22 12:22:43 +0800216 __be64 bits[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 unsigned int index, pad_len;
Herbert Xu06ace7a2005-10-30 21:25:15 +1100218 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
220 /* Save number of bits */
Herbert Xu13887ed2009-07-22 12:22:43 +0800221 bits[1] = cpu_to_be64(sctx->count[0] << 3);
222 bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224 /* Pad out to 112 mod 128. */
Herbert Xu13887ed2009-07-22 12:22:43 +0800225 index = sctx->count[0] & 0x7f;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100227 sha512_update(desc, padding, pad_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
229 /* Append length (before padding) */
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100230 sha512_update(desc, (const u8 *)bits, sizeof(bits));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232 /* Store state in digest */
Herbert Xu06ace7a2005-10-30 21:25:15 +1100233 for (i = 0; i < 8; i++)
234 dst[i] = cpu_to_be64(sctx->state[i]);
235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 /* Zeroize sensitive information. */
Herbert Xu1f38ad82009-07-22 11:48:18 +0800237 memset(sctx, 0, sizeof(struct sha512_state));
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100238
239 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240}
241
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100242static int sha384_final(struct shash_desc *desc, u8 *hash)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243{
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100244 u8 D[64];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100246 sha512_final(desc, D);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100248 memcpy(hash, D, 48);
249 memset(D, 0, 64);
250
251 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252}
253
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100254static struct shash_alg sha512 = {
255 .digestsize = SHA512_DIGEST_SIZE,
256 .init = sha512_init,
257 .update = sha512_update,
258 .final = sha512_final,
Herbert Xu1f38ad82009-07-22 11:48:18 +0800259 .descsize = sizeof(struct sha512_state),
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100260 .base = {
261 .cra_name = "sha512",
262 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
263 .cra_blocksize = SHA512_BLOCK_SIZE,
264 .cra_module = THIS_MODULE,
265 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266};
267
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100268static struct shash_alg sha384 = {
269 .digestsize = SHA384_DIGEST_SIZE,
270 .init = sha384_init,
271 .update = sha512_update,
272 .final = sha384_final,
Herbert Xu1f38ad82009-07-22 11:48:18 +0800273 .descsize = sizeof(struct sha512_state),
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100274 .base = {
275 .cra_name = "sha384",
276 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
277 .cra_blocksize = SHA384_BLOCK_SIZE,
278 .cra_module = THIS_MODULE,
279 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280};
281
Kamalesh Babulal3af5b902008-04-05 21:00:57 +0800282static int __init sha512_generic_mod_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
284 int ret = 0;
285
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100286 if ((ret = crypto_register_shash(&sha384)) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 goto out;
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100288 if ((ret = crypto_register_shash(&sha512)) < 0)
289 crypto_unregister_shash(&sha384);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290out:
291 return ret;
292}
293
Kamalesh Babulal3af5b902008-04-05 21:00:57 +0800294static void __exit sha512_generic_mod_fini(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295{
Adrian-Ken Rueegseggerbd9d20d2008-12-17 16:49:02 +1100296 crypto_unregister_shash(&sha384);
297 crypto_unregister_shash(&sha512);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298}
299
Kamalesh Babulal3af5b902008-04-05 21:00:57 +0800300module_init(sha512_generic_mod_init);
301module_exit(sha512_generic_mod_fini);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
303MODULE_LICENSE("GPL");
304MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");
Jan Glauber78f8b3a2008-03-06 19:55:38 +0800305
306MODULE_ALIAS("sha384");
307MODULE_ALIAS("sha512");