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14#include <linux/kernel.h>
15#include <linux/module.h>
16
17#include <linux/mm.h>
18#include <linux/init.h>
19#include <linux/crypto.h>
20
21#include <asm/scatterlist.h>
22#include <asm/byteorder.h>
23
24#define SHA384_DIGEST_SIZE 48
25#define SHA512_DIGEST_SIZE 64
26#define SHA384_HMAC_BLOCK_SIZE 96
27#define SHA512_HMAC_BLOCK_SIZE 128
28
29struct sha512_ctx {
30 u64 state[8];
31 u32 count[4];
32 u8 buf[128];
33};
34
35static inline u64 Ch(u64 x, u64 y, u64 z)
36{
37 return z ^ (x & (y ^ z));
38}
39
40static inline u64 Maj(u64 x, u64 y, u64 z)
41{
42 return (x & y) | (z & (x | y));
43}
44
45static inline u64 RORu64(u64 x, u64 y)
46{
47 return (x >> y) | (x << (64 - y));
48}
49
50const u64 sha512_K[80] = {
51 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
52 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
53 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
54 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
55 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
56 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
57 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
58 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
59 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
60 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
61 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
62 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
63 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
64 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
65 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
66 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
67 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
68 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
69 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
70 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
71 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
72 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
73 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
74 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
75 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
76 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
77 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL,
78};
79
80#define e0(x) (RORu64(x,28) ^ RORu64(x,34) ^ RORu64(x,39))
81#define e1(x) (RORu64(x,14) ^ RORu64(x,18) ^ RORu64(x,41))
82#define s0(x) (RORu64(x, 1) ^ RORu64(x, 8) ^ (x >> 7))
83#define s1(x) (RORu64(x,19) ^ RORu64(x,61) ^ (x >> 6))
84
85
86#define H0 0x6a09e667f3bcc908ULL
87#define H1 0xbb67ae8584caa73bULL
88#define H2 0x3c6ef372fe94f82bULL
89#define H3 0xa54ff53a5f1d36f1ULL
90#define H4 0x510e527fade682d1ULL
91#define H5 0x9b05688c2b3e6c1fULL
92#define H6 0x1f83d9abfb41bd6bULL
93#define H7 0x5be0cd19137e2179ULL
94
95
96#define HP0 0xcbbb9d5dc1059ed8ULL
97#define HP1 0x629a292a367cd507ULL
98#define HP2 0x9159015a3070dd17ULL
99#define HP3 0x152fecd8f70e5939ULL
100#define HP4 0x67332667ffc00b31ULL
101#define HP5 0x8eb44a8768581511ULL
102#define HP6 0xdb0c2e0d64f98fa7ULL
103#define HP7 0x47b5481dbefa4fa4ULL
104
105static inline void LOAD_OP(int I, u64 *W, const u8 *input)
106{
107 u64 t1 = input[(8*I) ] & 0xff;
108 t1 <<= 8;
109 t1 |= input[(8*I)+1] & 0xff;
110 t1 <<= 8;
111 t1 |= input[(8*I)+2] & 0xff;
112 t1 <<= 8;
113 t1 |= input[(8*I)+3] & 0xff;
114 t1 <<= 8;
115 t1 |= input[(8*I)+4] & 0xff;
116 t1 <<= 8;
117 t1 |= input[(8*I)+5] & 0xff;
118 t1 <<= 8;
119 t1 |= input[(8*I)+6] & 0xff;
120 t1 <<= 8;
121 t1 |= input[(8*I)+7] & 0xff;
122 W[I] = t1;
123}
124
125static inline void BLEND_OP(int I, u64 *W)
126{
127 W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
128}
129
130static void
131sha512_transform(u64 *state, const u8 *input)
132{
133 u64 a, b, c, d, e, f, g, h, t1, t2;
134 u64 W[80];
135
136 int i;
137
138
139 for (i = 0; i < 16; i++)
140 LOAD_OP(i, W, input);
141
142 for (i = 16; i < 80; i++) {
143 BLEND_OP(i, W);
144 }
145
146
147 a=state[0]; b=state[1]; c=state[2]; d=state[3];
148 e=state[4]; f=state[5]; g=state[6]; h=state[7];
149
150
151 for (i=0; i<80; i+=8) {
152 t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[i ];
153 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
154 t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[i+1];
155 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
156 t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[i+2];
157 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
158 t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[i+3];
159 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
160 t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[i+4];
161 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
162 t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[i+5];
163 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
164 t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[i+6];
165 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
166 t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[i+7];
167 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
168 }
169
170 state[0] += a; state[1] += b; state[2] += c; state[3] += d;
171 state[4] += e; state[5] += f; state[6] += g; state[7] += h;
172
173
174 a = b = c = d = e = f = g = h = t1 = t2 = 0;
175 memset(W, 0, 80 * sizeof(u64));
176}
177
178static void
179sha512_init(void *ctx)
180{
181 struct sha512_ctx *sctx = ctx;
182 sctx->state[0] = H0;
183 sctx->state[1] = H1;
184 sctx->state[2] = H2;
185 sctx->state[3] = H3;
186 sctx->state[4] = H4;
187 sctx->state[5] = H5;
188 sctx->state[6] = H6;
189 sctx->state[7] = H7;
190 sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0;
191 memset(sctx->buf, 0, sizeof(sctx->buf));
192}
193
194static void
195sha384_init(void *ctx)
196{
197 struct sha512_ctx *sctx = ctx;
198 sctx->state[0] = HP0;
199 sctx->state[1] = HP1;
200 sctx->state[2] = HP2;
201 sctx->state[3] = HP3;
202 sctx->state[4] = HP4;
203 sctx->state[5] = HP5;
204 sctx->state[6] = HP6;
205 sctx->state[7] = HP7;
206 sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0;
207 memset(sctx->buf, 0, sizeof(sctx->buf));
208}
209
210static void
211sha512_update(void *ctx, const u8 *data, unsigned int len)
212{
213 struct sha512_ctx *sctx = ctx;
214
215 unsigned int i, index, part_len;
216
217
218 index = (unsigned int)((sctx->count[0] >> 3) & 0x7F);
219
220
221 if ((sctx->count[0] += (len << 3)) < (len << 3)) {
222 if ((sctx->count[1] += 1) < 1)
223 if ((sctx->count[2] += 1) < 1)
224 sctx->count[3]++;
225 sctx->count[1] += (len >> 29);
226 }
227
228 part_len = 128 - index;
229
230
231 if (len >= part_len) {
232 memcpy(&sctx->buf[index], data, part_len);
233 sha512_transform(sctx->state, sctx->buf);
234
235 for (i = part_len; i + 127 < len; i+=128)
236 sha512_transform(sctx->state, &data[i]);
237
238 index = 0;
239 } else {
240 i = 0;
241 }
242
243
244 memcpy(&sctx->buf[index], &data[i], len - i);
245}
246
247static void
248sha512_final(void *ctx, u8 *hash)
249{
250 struct sha512_ctx *sctx = ctx;
251
252 static u8 padding[128] = { 0x80, };
253
254 u32 t;
255 u64 t2;
256 u8 bits[128];
257 unsigned int index, pad_len;
258 int i, j;
259
260 index = pad_len = t = i = j = 0;
261 t2 = 0;
262
263
264 t = sctx->count[0];
265 bits[15] = t; t>>=8;
266 bits[14] = t; t>>=8;
267 bits[13] = t; t>>=8;
268 bits[12] = t;
269 t = sctx->count[1];
270 bits[11] = t; t>>=8;
271 bits[10] = t; t>>=8;
272 bits[9 ] = t; t>>=8;
273 bits[8 ] = t;
274 t = sctx->count[2];
275 bits[7 ] = t; t>>=8;
276 bits[6 ] = t; t>>=8;
277 bits[5 ] = t; t>>=8;
278 bits[4 ] = t;
279 t = sctx->count[3];
280 bits[3 ] = t; t>>=8;
281 bits[2 ] = t; t>>=8;
282 bits[1 ] = t; t>>=8;
283 bits[0 ] = t;
284
285
286 index = (sctx->count[0] >> 3) & 0x7f;
287 pad_len = (index < 112) ? (112 - index) : ((128+112) - index);
288 sha512_update(sctx, padding, pad_len);
289
290
291 sha512_update(sctx, bits, 16);
292
293
294 for (i = j = 0; i < 8; i++, j += 8) {
295 t2 = sctx->state[i];
296 hash[j+7] = (char)t2 & 0xff; t2>>=8;
297 hash[j+6] = (char)t2 & 0xff; t2>>=8;
298 hash[j+5] = (char)t2 & 0xff; t2>>=8;
299 hash[j+4] = (char)t2 & 0xff; t2>>=8;
300 hash[j+3] = (char)t2 & 0xff; t2>>=8;
301 hash[j+2] = (char)t2 & 0xff; t2>>=8;
302 hash[j+1] = (char)t2 & 0xff; t2>>=8;
303 hash[j ] = (char)t2 & 0xff;
304 }
305
306
307 memset(sctx, 0, sizeof(struct sha512_ctx));
308}
309
310static void sha384_final(void *ctx, u8 *hash)
311{
312 struct sha512_ctx *sctx = ctx;
313 u8 D[64];
314
315 sha512_final(sctx, D);
316
317 memcpy(hash, D, 48);
318 memset(D, 0, 64);
319}
320
321static struct crypto_alg sha512 = {
322 .cra_name = "sha512",
323 .cra_flags = CRYPTO_ALG_TYPE_DIGEST,
324 .cra_blocksize = SHA512_HMAC_BLOCK_SIZE,
325 .cra_ctxsize = sizeof(struct sha512_ctx),
326 .cra_module = THIS_MODULE,
327 .cra_list = LIST_HEAD_INIT(sha512.cra_list),
328 .cra_u = { .digest = {
329 .dia_digestsize = SHA512_DIGEST_SIZE,
330 .dia_init = sha512_init,
331 .dia_update = sha512_update,
332 .dia_final = sha512_final }
333 }
334};
335
336static struct crypto_alg sha384 = {
337 .cra_name = "sha384",
338 .cra_flags = CRYPTO_ALG_TYPE_DIGEST,
339 .cra_blocksize = SHA384_HMAC_BLOCK_SIZE,
340 .cra_ctxsize = sizeof(struct sha512_ctx),
341 .cra_module = THIS_MODULE,
342 .cra_list = LIST_HEAD_INIT(sha384.cra_list),
343 .cra_u = { .digest = {
344 .dia_digestsize = SHA384_DIGEST_SIZE,
345 .dia_init = sha384_init,
346 .dia_update = sha512_update,
347 .dia_final = sha384_final }
348 }
349};
350
351MODULE_ALIAS("sha384");
352
353static int __init init(void)
354{
355 int ret = 0;
356
357 if ((ret = crypto_register_alg(&sha384)) < 0)
358 goto out;
359 if ((ret = crypto_register_alg(&sha512)) < 0)
360 crypto_unregister_alg(&sha384);
361out:
362 return ret;
363}
364
365static void __exit fini(void)
366{
367 crypto_unregister_alg(&sha384);
368 crypto_unregister_alg(&sha512);
369}
370
371module_init(init);
372module_exit(fini);
373
374MODULE_LICENSE("GPL");
375MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms");
376
