Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | */ | |
bd9d20db | 13 | #include <crypto/internal/hash.h> |
1da177e4 LT |
14 | #include <linux/kernel.h> |
15 | #include <linux/module.h> | |
1da177e4 LT |
16 | #include <linux/mm.h> |
17 | #include <linux/init.h> | |
18 | #include <linux/crypto.h> | |
06ace7a9 | 19 | #include <linux/types.h> |
5265eeb2 | 20 | #include <crypto/sha.h> |
f9e2bca6 | 21 | #include <linux/percpu.h> |
1da177e4 LT |
22 | #include <asm/byteorder.h> |
23 | ||
1da177e4 LT |
24 | struct sha512_ctx { |
25 | u64 state[8]; | |
26 | u32 count[4]; | |
27 | u8 buf[128]; | |
1da177e4 LT |
28 | }; |
29 | ||
f9e2bca6 AKR |
30 | static DEFINE_PER_CPU(u64[80], msg_schedule); |
31 | ||
1da177e4 LT |
32 | static inline u64 Ch(u64 x, u64 y, u64 z) |
33 | { | |
34 | return z ^ (x & (y ^ z)); | |
35 | } | |
36 | ||
37 | static inline u64 Maj(u64 x, u64 y, u64 z) | |
38 | { | |
39 | return (x & y) | (z & (x | y)); | |
40 | } | |
41 | ||
42 | static inline u64 RORu64(u64 x, u64 y) | |
43 | { | |
44 | return (x >> y) | (x << (64 - y)); | |
45 | } | |
46 | ||
47 | static const u64 sha512_K[80] = { | |
48 | 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, | |
49 | 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, | |
50 | 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, | |
51 | 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, | |
52 | 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, | |
53 | 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, | |
54 | 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, | |
55 | 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, | |
56 | 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, | |
57 | 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, | |
58 | 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, | |
59 | 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, | |
60 | 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, | |
61 | 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, | |
62 | 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, | |
63 | 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, | |
64 | 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, | |
65 | 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, | |
66 | 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, | |
67 | 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, | |
68 | 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, | |
69 | 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, | |
70 | 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, | |
71 | 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, | |
72 | 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, | |
73 | 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, | |
74 | 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL, | |
75 | }; | |
76 | ||
77 | #define e0(x) (RORu64(x,28) ^ RORu64(x,34) ^ RORu64(x,39)) | |
78 | #define e1(x) (RORu64(x,14) ^ RORu64(x,18) ^ RORu64(x,41)) | |
79 | #define s0(x) (RORu64(x, 1) ^ RORu64(x, 8) ^ (x >> 7)) | |
80 | #define s1(x) (RORu64(x,19) ^ RORu64(x,61) ^ (x >> 6)) | |
81 | ||
1da177e4 LT |
82 | static inline void LOAD_OP(int I, u64 *W, const u8 *input) |
83 | { | |
84 | W[I] = __be64_to_cpu( ((__be64*)(input))[I] ); | |
85 | } | |
86 | ||
87 | static inline void BLEND_OP(int I, u64 *W) | |
88 | { | |
89 | W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; | |
90 | } | |
91 | ||
92 | static void | |
f9e2bca6 | 93 | sha512_transform(u64 *state, const u8 *input) |
1da177e4 LT |
94 | { |
95 | u64 a, b, c, d, e, f, g, h, t1, t2; | |
96 | ||
97 | int i; | |
f9e2bca6 | 98 | u64 *W = get_cpu_var(msg_schedule); |
1da177e4 LT |
99 | |
100 | /* load the input */ | |
101 | for (i = 0; i < 16; i++) | |
102 | LOAD_OP(i, W, input); | |
103 | ||
104 | for (i = 16; i < 80; i++) { | |
105 | BLEND_OP(i, W); | |
106 | } | |
107 | ||
108 | /* load the state into our registers */ | |
78f8b3a2 JG |
109 | a=state[0]; b=state[1]; c=state[2]; d=state[3]; |
110 | e=state[4]; f=state[5]; g=state[6]; h=state[7]; | |
111 | ||
1da177e4 LT |
112 | /* now iterate */ |
113 | for (i=0; i<80; i+=8) { | |
114 | t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[i ]; | |
115 | t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; | |
116 | t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[i+1]; | |
117 | t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; | |
118 | t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[i+2]; | |
119 | t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; | |
120 | t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[i+3]; | |
121 | t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; | |
122 | t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[i+4]; | |
123 | t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; | |
124 | t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[i+5]; | |
125 | t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; | |
126 | t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[i+6]; | |
127 | t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; | |
128 | t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[i+7]; | |
129 | t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; | |
130 | } | |
78f8b3a2 JG |
131 | |
132 | state[0] += a; state[1] += b; state[2] += c; state[3] += d; | |
133 | state[4] += e; state[5] += f; state[6] += g; state[7] += h; | |
1da177e4 LT |
134 | |
135 | /* erase our data */ | |
136 | a = b = c = d = e = f = g = h = t1 = t2 = 0; | |
f9e2bca6 AKR |
137 | memset(W, 0, sizeof(__get_cpu_var(msg_schedule))); |
138 | put_cpu_var(msg_schedule); | |
1da177e4 LT |
139 | } |
140 | ||
bd9d20db AKR |
141 | static int |
142 | sha512_init(struct shash_desc *desc) | |
1da177e4 | 143 | { |
bd9d20db | 144 | struct sha512_ctx *sctx = shash_desc_ctx(desc); |
5265eeb2 JG |
145 | 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; | |
1da177e4 | 153 | sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; |
bd9d20db AKR |
154 | |
155 | return 0; | |
1da177e4 LT |
156 | } |
157 | ||
bd9d20db AKR |
158 | static int |
159 | sha384_init(struct shash_desc *desc) | |
1da177e4 | 160 | { |
bd9d20db | 161 | struct sha512_ctx *sctx = shash_desc_ctx(desc); |
5265eeb2 JG |
162 | 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; | |
1da177e4 | 170 | sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; |
bd9d20db AKR |
171 | |
172 | return 0; | |
1da177e4 LT |
173 | } |
174 | ||
bd9d20db AKR |
175 | static int |
176 | sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len) | |
1da177e4 | 177 | { |
bd9d20db | 178 | struct sha512_ctx *sctx = shash_desc_ctx(desc); |
1da177e4 LT |
179 | |
180 | unsigned int i, index, part_len; | |
181 | ||
182 | /* Compute number of bytes mod 128 */ | |
183 | index = (unsigned int)((sctx->count[0] >> 3) & 0x7F); | |
78f8b3a2 | 184 | |
1da177e4 LT |
185 | /* Update number of bits */ |
186 | if ((sctx->count[0] += (len << 3)) < (len << 3)) { | |
187 | if ((sctx->count[1] += 1) < 1) | |
188 | if ((sctx->count[2] += 1) < 1) | |
189 | sctx->count[3]++; | |
190 | sctx->count[1] += (len >> 29); | |
191 | } | |
78f8b3a2 | 192 | |
1da177e4 | 193 | part_len = 128 - index; |
78f8b3a2 | 194 | |
1da177e4 LT |
195 | /* Transform as many times as possible. */ |
196 | if (len >= part_len) { | |
197 | memcpy(&sctx->buf[index], data, part_len); | |
f9e2bca6 | 198 | sha512_transform(sctx->state, sctx->buf); |
1da177e4 LT |
199 | |
200 | for (i = part_len; i + 127 < len; i+=128) | |
f9e2bca6 | 201 | sha512_transform(sctx->state, &data[i]); |
1da177e4 LT |
202 | |
203 | index = 0; | |
204 | } else { | |
205 | i = 0; | |
206 | } | |
207 | ||
208 | /* Buffer remaining input */ | |
209 | memcpy(&sctx->buf[index], &data[i], len - i); | |
bd9d20db AKR |
210 | |
211 | return 0; | |
1da177e4 LT |
212 | } |
213 | ||
bd9d20db AKR |
214 | static int |
215 | sha512_final(struct shash_desc *desc, u8 *hash) | |
1da177e4 | 216 | { |
bd9d20db | 217 | struct sha512_ctx *sctx = shash_desc_ctx(desc); |
1da177e4 | 218 | static u8 padding[128] = { 0x80, }; |
06ace7a9 HX |
219 | __be64 *dst = (__be64 *)hash; |
220 | __be32 bits[4]; | |
1da177e4 | 221 | unsigned int index, pad_len; |
06ace7a9 | 222 | int i; |
1da177e4 LT |
223 | |
224 | /* Save number of bits */ | |
06ace7a9 HX |
225 | bits[3] = cpu_to_be32(sctx->count[0]); |
226 | bits[2] = cpu_to_be32(sctx->count[1]); | |
227 | bits[1] = cpu_to_be32(sctx->count[2]); | |
228 | bits[0] = cpu_to_be32(sctx->count[3]); | |
1da177e4 LT |
229 | |
230 | /* Pad out to 112 mod 128. */ | |
231 | index = (sctx->count[0] >> 3) & 0x7f; | |
232 | pad_len = (index < 112) ? (112 - index) : ((128+112) - index); | |
bd9d20db | 233 | sha512_update(desc, padding, pad_len); |
1da177e4 LT |
234 | |
235 | /* Append length (before padding) */ | |
bd9d20db | 236 | sha512_update(desc, (const u8 *)bits, sizeof(bits)); |
1da177e4 LT |
237 | |
238 | /* Store state in digest */ | |
06ace7a9 HX |
239 | for (i = 0; i < 8; i++) |
240 | dst[i] = cpu_to_be64(sctx->state[i]); | |
241 | ||
1da177e4 LT |
242 | /* Zeroize sensitive information. */ |
243 | memset(sctx, 0, sizeof(struct sha512_ctx)); | |
bd9d20db AKR |
244 | |
245 | return 0; | |
1da177e4 LT |
246 | } |
247 | ||
bd9d20db | 248 | static int sha384_final(struct shash_desc *desc, u8 *hash) |
1da177e4 | 249 | { |
bd9d20db | 250 | u8 D[64]; |
1da177e4 | 251 | |
bd9d20db | 252 | sha512_final(desc, D); |
1da177e4 | 253 | |
bd9d20db AKR |
254 | memcpy(hash, D, 48); |
255 | memset(D, 0, 64); | |
256 | ||
257 | return 0; | |
1da177e4 LT |
258 | } |
259 | ||
bd9d20db AKR |
260 | static struct shash_alg sha512 = { |
261 | .digestsize = SHA512_DIGEST_SIZE, | |
262 | .init = sha512_init, | |
263 | .update = sha512_update, | |
264 | .final = sha512_final, | |
265 | .descsize = sizeof(struct sha512_ctx), | |
266 | .base = { | |
267 | .cra_name = "sha512", | |
268 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
269 | .cra_blocksize = SHA512_BLOCK_SIZE, | |
270 | .cra_module = THIS_MODULE, | |
271 | } | |
1da177e4 LT |
272 | }; |
273 | ||
bd9d20db AKR |
274 | static struct shash_alg sha384 = { |
275 | .digestsize = SHA384_DIGEST_SIZE, | |
276 | .init = sha384_init, | |
277 | .update = sha512_update, | |
278 | .final = sha384_final, | |
279 | .descsize = sizeof(struct sha512_ctx), | |
280 | .base = { | |
281 | .cra_name = "sha384", | |
282 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, | |
283 | .cra_blocksize = SHA384_BLOCK_SIZE, | |
284 | .cra_module = THIS_MODULE, | |
285 | } | |
1da177e4 LT |
286 | }; |
287 | ||
3af5b90b | 288 | static int __init sha512_generic_mod_init(void) |
1da177e4 LT |
289 | { |
290 | int ret = 0; | |
291 | ||
bd9d20db | 292 | if ((ret = crypto_register_shash(&sha384)) < 0) |
1da177e4 | 293 | goto out; |
bd9d20db AKR |
294 | if ((ret = crypto_register_shash(&sha512)) < 0) |
295 | crypto_unregister_shash(&sha384); | |
1da177e4 LT |
296 | out: |
297 | return ret; | |
298 | } | |
299 | ||
3af5b90b | 300 | static void __exit sha512_generic_mod_fini(void) |
1da177e4 | 301 | { |
bd9d20db AKR |
302 | crypto_unregister_shash(&sha384); |
303 | crypto_unregister_shash(&sha512); | |
1da177e4 LT |
304 | } |
305 | ||
3af5b90b KB |
306 | module_init(sha512_generic_mod_init); |
307 | module_exit(sha512_generic_mod_fini); | |
1da177e4 LT |
308 | |
309 | MODULE_LICENSE("GPL"); | |
310 | MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms"); | |
78f8b3a2 JG |
311 | |
312 | MODULE_ALIAS("sha384"); | |
313 | MODULE_ALIAS("sha512"); |