1 /* $FreeBSD: src/sys/crypto/sha2/sha2.c,v 1.2.2.2 2002/03/05 08:36:47 ume Exp $ */
2 /* $DragonFly: src/sys/crypto/sha2/sha2.c,v 1.2 2003/06/17 04:28:20 dillon Exp $ */
3 /* $KAME: sha2.c,v 1.8 2001/11/08 01:07:52 itojun Exp $ */
10 * Written by Aaron D. Gifford <me@aarongifford.com>
12 * Copyright 2000 Aaron D. Gifford. All rights reserved.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. Neither the name of the copyright holder nor the names of contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTOR(S) BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 #include <sys/types.h>
43 #include <sys/systm.h>
44 #include <machine/endian.h>
45 #include <crypto/sha2/sha2.h>
49 * Some sanity checking code is included using assert(). On my FreeBSD
50 * system, this additional code can be removed by compiling with NDEBUG
51 * defined. Check your own systems manpage on assert() to see how to
52 * compile WITHOUT the sanity checking code on your system.
54 * UNROLLED TRANSFORM LOOP NOTE:
55 * You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform
56 * loop version for the hash transform rounds (defined using macros
57 * later in this file). Either define on the command line, for example:
59 * cc -DSHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c
63 * #define SHA2_UNROLL_TRANSFORM
67 #if defined(__bsdi__) || defined(__FreeBSD__)
72 /*** SHA-256/384/512 Machine Architecture Definitions *****************/
76 * Please make sure that your system defines BYTE_ORDER. If your
77 * architecture is little-endian, make sure it also defines
78 * LITTLE_ENDIAN and that the two (BYTE_ORDER and LITTLE_ENDIAN) are
81 * If your system does not define the above, then you can do so by
84 * #define LITTLE_ENDIAN 1234
85 * #define BIG_ENDIAN 4321
87 * And for little-endian machines, add:
89 * #define BYTE_ORDER LITTLE_ENDIAN
91 * Or for big-endian machines:
93 * #define BYTE_ORDER BIG_ENDIAN
95 * The FreeBSD machine this was written on defines BYTE_ORDER
96 * appropriately by including <sys/types.h> (which in turn includes
97 * <machine/endian.h> where the appropriate definitions are actually
100 #if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN)
101 #error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
105 * Define the followingsha2_* types to types of the correct length on
106 * the native archtecture. Most BSD systems and Linux define u_intXX_t
107 * types. Machines with very recent ANSI C headers, can use the
108 * uintXX_t definintions from inttypes.h by defining SHA2_USE_INTTYPES_H
109 * during compile or in the sha.h header file.
111 * Machines that support neither u_intXX_t nor inttypes.h's uintXX_t
112 * will need to define these three typedefs below (and the appropriate
113 * ones in sha.h too) by hand according to their system architecture.
115 * Thank you, Jun-ichiro itojun Hagino, for suggesting using u_intXX_t
116 * types and pointing out recent ANSI C support for uintXX_t in inttypes.h.
118 #if 0 /*def SHA2_USE_INTTYPES_H*/
120 typedef uint8_t sha2_byte; /* Exactly 1 byte */
121 typedef uint32_t sha2_word32; /* Exactly 4 bytes */
122 typedef uint64_t sha2_word64; /* Exactly 8 bytes */
124 #else /* SHA2_USE_INTTYPES_H */
126 typedef u_int8_t sha2_byte; /* Exactly 1 byte */
127 typedef u_int32_t sha2_word32; /* Exactly 4 bytes */
128 typedef u_int64_t sha2_word64; /* Exactly 8 bytes */
130 #endif /* SHA2_USE_INTTYPES_H */
133 /*** SHA-256/384/512 Various Length Definitions ***********************/
134 /* NOTE: Most of these are in sha2.h */
135 #define SHA256_SHORT_BLOCK_LENGTH (SHA256_BLOCK_LENGTH - 8)
136 #define SHA384_SHORT_BLOCK_LENGTH (SHA384_BLOCK_LENGTH - 16)
137 #define SHA512_SHORT_BLOCK_LENGTH (SHA512_BLOCK_LENGTH - 16)
140 /*** ENDIAN REVERSAL MACROS *******************************************/
141 #if BYTE_ORDER == LITTLE_ENDIAN
142 #define REVERSE32(w,x) { \
143 sha2_word32 tmp = (w); \
144 tmp = (tmp >> 16) | (tmp << 16); \
145 (x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \
147 #define REVERSE64(w,x) { \
148 sha2_word64 tmp = (w); \
149 tmp = (tmp >> 32) | (tmp << 32); \
150 tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
151 ((tmp & 0x00ff00ff00ff00ffULL) << 8); \
152 (x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \
153 ((tmp & 0x0000ffff0000ffffULL) << 16); \
155 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
158 * Macro for incrementally adding the unsigned 64-bit integer n to the
159 * unsigned 128-bit integer (represented using a two-element array of
162 #define ADDINC128(w,n) { \
163 (w)[0] += (sha2_word64)(n); \
164 if ((w)[0] < (n)) { \
169 /*** THE SIX LOGICAL FUNCTIONS ****************************************/
171 * Bit shifting and rotation (used by the six SHA-XYZ logical functions:
173 * NOTE: The naming of R and S appears backwards here (R is a SHIFT and
174 * S is a ROTATION) because the SHA-256/384/512 description document
175 * (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this
176 * same "backwards" definition.
178 /* Shift-right (used in SHA-256, SHA-384, and SHA-512): */
179 #define R(b,x) ((x) >> (b))
180 /* 32-bit Rotate-right (used in SHA-256): */
181 #define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b))))
182 /* 64-bit Rotate-right (used in SHA-384 and SHA-512): */
183 #define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b))))
185 /* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */
186 #define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
187 #define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
189 /* Four of six logical functions used in SHA-256: */
190 #define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))
191 #define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))
192 #define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x)))
193 #define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))
195 /* Four of six logical functions used in SHA-384 and SHA-512: */
196 #define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
197 #define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
198 #define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x)))
199 #define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x)))
201 /*** INTERNAL FUNCTION PROTOTYPES *************************************/
202 /* NOTE: These should not be accessed directly from outside this
203 * library -- they are intended for private internal visibility/use
206 void SHA512_Last(SHA512_CTX*);
207 void SHA256_Transform(SHA256_CTX*, const sha2_word32*);
208 void SHA512_Transform(SHA512_CTX*, const sha2_word64*);
211 /*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
212 /* Hash constant words K for SHA-256: */
213 const static sha2_word32 K256[64] = {
214 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
215 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
216 0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
217 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
218 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
219 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
220 0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
221 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
222 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
223 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
224 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
225 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
226 0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
227 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
228 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
229 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
232 /* Initial hash value H for SHA-256: */
233 const static sha2_word32 sha256_initial_hash_value[8] = {
244 /* Hash constant words K for SHA-384 and SHA-512: */
245 const static sha2_word64 K512[80] = {
246 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
247 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
248 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
249 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
250 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
251 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
252 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
253 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
254 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
255 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
256 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
257 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
258 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
259 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
260 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
261 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
262 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
263 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
264 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
265 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
266 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
267 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
268 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
269 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
270 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
271 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
272 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
273 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
274 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
275 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
276 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
277 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
278 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
279 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
280 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
281 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
282 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
283 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
284 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
285 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
288 /* Initial hash value H for SHA-384 */
289 const static sha2_word64 sha384_initial_hash_value[8] = {
290 0xcbbb9d5dc1059ed8ULL,
291 0x629a292a367cd507ULL,
292 0x9159015a3070dd17ULL,
293 0x152fecd8f70e5939ULL,
294 0x67332667ffc00b31ULL,
295 0x8eb44a8768581511ULL,
296 0xdb0c2e0d64f98fa7ULL,
297 0x47b5481dbefa4fa4ULL
300 /* Initial hash value H for SHA-512 */
301 const static sha2_word64 sha512_initial_hash_value[8] = {
302 0x6a09e667f3bcc908ULL,
303 0xbb67ae8584caa73bULL,
304 0x3c6ef372fe94f82bULL,
305 0xa54ff53a5f1d36f1ULL,
306 0x510e527fade682d1ULL,
307 0x9b05688c2b3e6c1fULL,
308 0x1f83d9abfb41bd6bULL,
309 0x5be0cd19137e2179ULL
313 * Constant used by SHA256/384/512_End() functions for converting the
314 * digest to a readable hexadecimal character string:
316 static const char *sha2_hex_digits = "0123456789abcdef";
319 /*** SHA-256: *********************************************************/
320 void SHA256_Init(SHA256_CTX* context) {
321 if (context == (SHA256_CTX*)0) {
324 bcopy(sha256_initial_hash_value, context->state, SHA256_DIGEST_LENGTH);
325 bzero(context->buffer, SHA256_BLOCK_LENGTH);
326 context->bitcount = 0;
329 #ifdef SHA2_UNROLL_TRANSFORM
331 /* Unrolled SHA-256 round macros: */
333 #if BYTE_ORDER == LITTLE_ENDIAN
335 #define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
336 REVERSE32(*data++, W256[j]); \
337 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
340 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
344 #else /* BYTE_ORDER == LITTLE_ENDIAN */
346 #define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
347 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
348 K256[j] + (W256[j] = *data++); \
350 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
353 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
355 #define ROUND256(a,b,c,d,e,f,g,h) \
356 s0 = W256[(j+1)&0x0f]; \
357 s0 = sigma0_256(s0); \
358 s1 = W256[(j+14)&0x0f]; \
359 s1 = sigma1_256(s1); \
360 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[j] + \
361 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \
363 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
366 void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
367 sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
368 sha2_word32 T1, *W256;
371 W256 = (sha2_word32*)context->buffer;
373 /* Initialize registers with the prev. intermediate value */
374 a = context->state[0];
375 b = context->state[1];
376 c = context->state[2];
377 d = context->state[3];
378 e = context->state[4];
379 f = context->state[5];
380 g = context->state[6];
381 h = context->state[7];
385 /* Rounds 0 to 15 (unrolled): */
386 ROUND256_0_TO_15(a,b,c,d,e,f,g,h);
387 ROUND256_0_TO_15(h,a,b,c,d,e,f,g);
388 ROUND256_0_TO_15(g,h,a,b,c,d,e,f);
389 ROUND256_0_TO_15(f,g,h,a,b,c,d,e);
390 ROUND256_0_TO_15(e,f,g,h,a,b,c,d);
391 ROUND256_0_TO_15(d,e,f,g,h,a,b,c);
392 ROUND256_0_TO_15(c,d,e,f,g,h,a,b);
393 ROUND256_0_TO_15(b,c,d,e,f,g,h,a);
396 /* Now for the remaining rounds to 64: */
398 ROUND256(a,b,c,d,e,f,g,h);
399 ROUND256(h,a,b,c,d,e,f,g);
400 ROUND256(g,h,a,b,c,d,e,f);
401 ROUND256(f,g,h,a,b,c,d,e);
402 ROUND256(e,f,g,h,a,b,c,d);
403 ROUND256(d,e,f,g,h,a,b,c);
404 ROUND256(c,d,e,f,g,h,a,b);
405 ROUND256(b,c,d,e,f,g,h,a);
408 /* Compute the current intermediate hash value */
409 context->state[0] += a;
410 context->state[1] += b;
411 context->state[2] += c;
412 context->state[3] += d;
413 context->state[4] += e;
414 context->state[5] += f;
415 context->state[6] += g;
416 context->state[7] += h;
419 a = b = c = d = e = f = g = h = T1 = 0;
422 #else /* SHA2_UNROLL_TRANSFORM */
424 void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
425 sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
426 sha2_word32 T1, T2, *W256;
429 W256 = (sha2_word32*)context->buffer;
431 /* Initialize registers with the prev. intermediate value */
432 a = context->state[0];
433 b = context->state[1];
434 c = context->state[2];
435 d = context->state[3];
436 e = context->state[4];
437 f = context->state[5];
438 g = context->state[6];
439 h = context->state[7];
443 #if BYTE_ORDER == LITTLE_ENDIAN
444 /* Copy data while converting to host byte order */
445 REVERSE32(*data++,W256[j]);
446 /* Apply the SHA-256 compression function to update a..h */
447 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];
448 #else /* BYTE_ORDER == LITTLE_ENDIAN */
449 /* Apply the SHA-256 compression function to update a..h with copy */
450 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + (W256[j] = *data++);
451 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
452 T2 = Sigma0_256(a) + Maj(a, b, c);
466 /* Part of the message block expansion: */
467 s0 = W256[(j+1)&0x0f];
469 s1 = W256[(j+14)&0x0f];
472 /* Apply the SHA-256 compression function to update a..h */
473 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] +
474 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0);
475 T2 = Sigma0_256(a) + Maj(a, b, c);
488 /* Compute the current intermediate hash value */
489 context->state[0] += a;
490 context->state[1] += b;
491 context->state[2] += c;
492 context->state[3] += d;
493 context->state[4] += e;
494 context->state[5] += f;
495 context->state[6] += g;
496 context->state[7] += h;
499 a = b = c = d = e = f = g = h = T1 = T2 = 0;
502 #endif /* SHA2_UNROLL_TRANSFORM */
504 void SHA256_Update(SHA256_CTX* context, const sha2_byte *data, size_t len) {
505 unsigned int freespace, usedspace;
508 /* Calling with no data is valid - we do nothing */
513 assert(context != (SHA256_CTX*)0 && data != (sha2_byte*)0);
515 usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
517 /* Calculate how much free space is available in the buffer */
518 freespace = SHA256_BLOCK_LENGTH - usedspace;
520 if (len >= freespace) {
521 /* Fill the buffer completely and process it */
522 bcopy(data, &context->buffer[usedspace], freespace);
523 context->bitcount += freespace << 3;
526 SHA256_Transform(context, (sha2_word32*)context->buffer);
528 /* The buffer is not yet full */
529 bcopy(data, &context->buffer[usedspace], len);
530 context->bitcount += len << 3;
532 usedspace = freespace = 0;
536 while (len >= SHA256_BLOCK_LENGTH) {
537 /* Process as many complete blocks as we can */
538 SHA256_Transform(context, (const sha2_word32*)data);
539 context->bitcount += SHA256_BLOCK_LENGTH << 3;
540 len -= SHA256_BLOCK_LENGTH;
541 data += SHA256_BLOCK_LENGTH;
544 /* There's left-overs, so save 'em */
545 bcopy(data, context->buffer, len);
546 context->bitcount += len << 3;
549 usedspace = freespace = 0;
552 void SHA256_Final(sha2_byte digest[], SHA256_CTX* context) {
553 sha2_word32 *d = (sha2_word32*)digest;
554 unsigned int usedspace;
557 assert(context != (SHA256_CTX*)0);
559 /* If no digest buffer is passed, we don't bother doing this: */
560 if (digest != (sha2_byte*)0) {
561 usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
562 #if BYTE_ORDER == LITTLE_ENDIAN
563 /* Convert FROM host byte order */
564 REVERSE64(context->bitcount,context->bitcount);
567 /* Begin padding with a 1 bit: */
568 context->buffer[usedspace++] = 0x80;
570 if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) {
571 /* Set-up for the last transform: */
572 bzero(&context->buffer[usedspace], SHA256_SHORT_BLOCK_LENGTH - usedspace);
574 if (usedspace < SHA256_BLOCK_LENGTH) {
575 bzero(&context->buffer[usedspace], SHA256_BLOCK_LENGTH - usedspace);
577 /* Do second-to-last transform: */
578 SHA256_Transform(context, (sha2_word32*)context->buffer);
580 /* And set-up for the last transform: */
581 bzero(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
584 /* Set-up for the last transform: */
585 bzero(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
587 /* Begin padding with a 1 bit: */
588 *context->buffer = 0x80;
590 /* Set the bit count: */
591 *(sha2_word64*)&context->buffer[SHA256_SHORT_BLOCK_LENGTH] = context->bitcount;
593 /* Final transform: */
594 SHA256_Transform(context, (sha2_word32*)context->buffer);
596 #if BYTE_ORDER == LITTLE_ENDIAN
598 /* Convert TO host byte order */
600 for (j = 0; j < 8; j++) {
601 REVERSE32(context->state[j],context->state[j]);
602 *d++ = context->state[j];
606 bcopy(context->state, d, SHA256_DIGEST_LENGTH);
610 /* Clean up state data: */
611 bzero(context, sizeof(context));
615 char *SHA256_End(SHA256_CTX* context, char buffer[]) {
616 sha2_byte digest[SHA256_DIGEST_LENGTH], *d = digest;
620 assert(context != (SHA256_CTX*)0);
622 if (buffer != (char*)0) {
623 SHA256_Final(digest, context);
625 for (i = 0; i < SHA256_DIGEST_LENGTH; i++) {
626 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
627 *buffer++ = sha2_hex_digits[*d & 0x0f];
632 bzero(context, sizeof(context));
634 bzero(digest, SHA256_DIGEST_LENGTH);
638 char* SHA256_Data(const sha2_byte* data, size_t len, char digest[SHA256_DIGEST_STRING_LENGTH]) {
641 SHA256_Init(&context);
642 SHA256_Update(&context, data, len);
643 return SHA256_End(&context, digest);
647 /*** SHA-512: *********************************************************/
648 void SHA512_Init(SHA512_CTX* context) {
649 if (context == (SHA512_CTX*)0) {
652 bcopy(sha512_initial_hash_value, context->state, SHA512_DIGEST_LENGTH);
653 bzero(context->buffer, SHA512_BLOCK_LENGTH);
654 context->bitcount[0] = context->bitcount[1] = 0;
657 #ifdef SHA2_UNROLL_TRANSFORM
659 /* Unrolled SHA-512 round macros: */
660 #if BYTE_ORDER == LITTLE_ENDIAN
662 #define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
663 REVERSE64(*data++, W512[j]); \
664 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
667 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)), \
671 #else /* BYTE_ORDER == LITTLE_ENDIAN */
673 #define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
674 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
675 K512[j] + (W512[j] = *data++); \
677 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
680 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
682 #define ROUND512(a,b,c,d,e,f,g,h) \
683 s0 = W512[(j+1)&0x0f]; \
684 s0 = sigma0_512(s0); \
685 s1 = W512[(j+14)&0x0f]; \
686 s1 = sigma1_512(s1); \
687 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[j] + \
688 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \
690 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
693 void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
694 sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
695 sha2_word64 T1, *W512 = (sha2_word64*)context->buffer;
698 /* Initialize registers with the prev. intermediate value */
699 a = context->state[0];
700 b = context->state[1];
701 c = context->state[2];
702 d = context->state[3];
703 e = context->state[4];
704 f = context->state[5];
705 g = context->state[6];
706 h = context->state[7];
710 ROUND512_0_TO_15(a,b,c,d,e,f,g,h);
711 ROUND512_0_TO_15(h,a,b,c,d,e,f,g);
712 ROUND512_0_TO_15(g,h,a,b,c,d,e,f);
713 ROUND512_0_TO_15(f,g,h,a,b,c,d,e);
714 ROUND512_0_TO_15(e,f,g,h,a,b,c,d);
715 ROUND512_0_TO_15(d,e,f,g,h,a,b,c);
716 ROUND512_0_TO_15(c,d,e,f,g,h,a,b);
717 ROUND512_0_TO_15(b,c,d,e,f,g,h,a);
720 /* Now for the remaining rounds up to 79: */
722 ROUND512(a,b,c,d,e,f,g,h);
723 ROUND512(h,a,b,c,d,e,f,g);
724 ROUND512(g,h,a,b,c,d,e,f);
725 ROUND512(f,g,h,a,b,c,d,e);
726 ROUND512(e,f,g,h,a,b,c,d);
727 ROUND512(d,e,f,g,h,a,b,c);
728 ROUND512(c,d,e,f,g,h,a,b);
729 ROUND512(b,c,d,e,f,g,h,a);
732 /* Compute the current intermediate hash value */
733 context->state[0] += a;
734 context->state[1] += b;
735 context->state[2] += c;
736 context->state[3] += d;
737 context->state[4] += e;
738 context->state[5] += f;
739 context->state[6] += g;
740 context->state[7] += h;
743 a = b = c = d = e = f = g = h = T1 = 0;
746 #else /* SHA2_UNROLL_TRANSFORM */
748 void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
749 sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
750 sha2_word64 T1, T2, *W512 = (sha2_word64*)context->buffer;
753 /* Initialize registers with the prev. intermediate value */
754 a = context->state[0];
755 b = context->state[1];
756 c = context->state[2];
757 d = context->state[3];
758 e = context->state[4];
759 f = context->state[5];
760 g = context->state[6];
761 h = context->state[7];
765 #if BYTE_ORDER == LITTLE_ENDIAN
766 /* Convert TO host byte order */
767 REVERSE64(*data++, W512[j]);
768 /* Apply the SHA-512 compression function to update a..h */
769 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];
770 #else /* BYTE_ORDER == LITTLE_ENDIAN */
771 /* Apply the SHA-512 compression function to update a..h with copy */
772 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + (W512[j] = *data++);
773 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
774 T2 = Sigma0_512(a) + Maj(a, b, c);
788 /* Part of the message block expansion: */
789 s0 = W512[(j+1)&0x0f];
791 s1 = W512[(j+14)&0x0f];
794 /* Apply the SHA-512 compression function to update a..h */
795 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +
796 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0);
797 T2 = Sigma0_512(a) + Maj(a, b, c);
810 /* Compute the current intermediate hash value */
811 context->state[0] += a;
812 context->state[1] += b;
813 context->state[2] += c;
814 context->state[3] += d;
815 context->state[4] += e;
816 context->state[5] += f;
817 context->state[6] += g;
818 context->state[7] += h;
821 a = b = c = d = e = f = g = h = T1 = T2 = 0;
824 #endif /* SHA2_UNROLL_TRANSFORM */
826 void SHA512_Update(SHA512_CTX* context, const sha2_byte *data, size_t len) {
827 unsigned int freespace, usedspace;
830 /* Calling with no data is valid - we do nothing */
835 assert(context != (SHA512_CTX*)0 && data != (sha2_byte*)0);
837 usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
839 /* Calculate how much free space is available in the buffer */
840 freespace = SHA512_BLOCK_LENGTH - usedspace;
842 if (len >= freespace) {
843 /* Fill the buffer completely and process it */
844 bcopy(data, &context->buffer[usedspace], freespace);
845 ADDINC128(context->bitcount, freespace << 3);
848 SHA512_Transform(context, (sha2_word64*)context->buffer);
850 /* The buffer is not yet full */
851 bcopy(data, &context->buffer[usedspace], len);
852 ADDINC128(context->bitcount, len << 3);
854 usedspace = freespace = 0;
858 while (len >= SHA512_BLOCK_LENGTH) {
859 /* Process as many complete blocks as we can */
860 SHA512_Transform(context, (const sha2_word64*)data);
861 ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
862 len -= SHA512_BLOCK_LENGTH;
863 data += SHA512_BLOCK_LENGTH;
866 /* There's left-overs, so save 'em */
867 bcopy(data, context->buffer, len);
868 ADDINC128(context->bitcount, len << 3);
871 usedspace = freespace = 0;
874 void SHA512_Last(SHA512_CTX* context) {
875 unsigned int usedspace;
877 usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
878 #if BYTE_ORDER == LITTLE_ENDIAN
879 /* Convert FROM host byte order */
880 REVERSE64(context->bitcount[0],context->bitcount[0]);
881 REVERSE64(context->bitcount[1],context->bitcount[1]);
884 /* Begin padding with a 1 bit: */
885 context->buffer[usedspace++] = 0x80;
887 if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) {
888 /* Set-up for the last transform: */
889 bzero(&context->buffer[usedspace], SHA512_SHORT_BLOCK_LENGTH - usedspace);
891 if (usedspace < SHA512_BLOCK_LENGTH) {
892 bzero(&context->buffer[usedspace], SHA512_BLOCK_LENGTH - usedspace);
894 /* Do second-to-last transform: */
895 SHA512_Transform(context, (sha2_word64*)context->buffer);
897 /* And set-up for the last transform: */
898 bzero(context->buffer, SHA512_BLOCK_LENGTH - 2);
901 /* Prepare for final transform: */
902 bzero(context->buffer, SHA512_SHORT_BLOCK_LENGTH);
904 /* Begin padding with a 1 bit: */
905 *context->buffer = 0x80;
907 /* Store the length of input data (in bits): */
908 *(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH] = context->bitcount[1];
909 *(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH+8] = context->bitcount[0];
911 /* Final transform: */
912 SHA512_Transform(context, (sha2_word64*)context->buffer);
915 void SHA512_Final(sha2_byte digest[], SHA512_CTX* context) {
916 sha2_word64 *d = (sha2_word64*)digest;
919 assert(context != (SHA512_CTX*)0);
921 /* If no digest buffer is passed, we don't bother doing this: */
922 if (digest != (sha2_byte*)0) {
923 SHA512_Last(context);
925 /* Save the hash data for output: */
926 #if BYTE_ORDER == LITTLE_ENDIAN
928 /* Convert TO host byte order */
930 for (j = 0; j < 8; j++) {
931 REVERSE64(context->state[j],context->state[j]);
932 *d++ = context->state[j];
936 bcopy(context->state, d, SHA512_DIGEST_LENGTH);
940 /* Zero out state data */
941 bzero(context, sizeof(context));
944 char *SHA512_End(SHA512_CTX* context, char buffer[]) {
945 sha2_byte digest[SHA512_DIGEST_LENGTH], *d = digest;
949 assert(context != (SHA512_CTX*)0);
951 if (buffer != (char*)0) {
952 SHA512_Final(digest, context);
954 for (i = 0; i < SHA512_DIGEST_LENGTH; i++) {
955 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
956 *buffer++ = sha2_hex_digits[*d & 0x0f];
961 bzero(context, sizeof(context));
963 bzero(digest, SHA512_DIGEST_LENGTH);
967 char* SHA512_Data(const sha2_byte* data, size_t len, char digest[SHA512_DIGEST_STRING_LENGTH]) {
970 SHA512_Init(&context);
971 SHA512_Update(&context, data, len);
972 return SHA512_End(&context, digest);
976 /*** SHA-384: *********************************************************/
977 void SHA384_Init(SHA384_CTX* context) {
978 if (context == (SHA384_CTX*)0) {
981 bcopy(sha384_initial_hash_value, context->state, SHA512_DIGEST_LENGTH);
982 bzero(context->buffer, SHA384_BLOCK_LENGTH);
983 context->bitcount[0] = context->bitcount[1] = 0;
986 void SHA384_Update(SHA384_CTX* context, const sha2_byte* data, size_t len) {
987 SHA512_Update((SHA512_CTX*)context, data, len);
990 void SHA384_Final(sha2_byte digest[], SHA384_CTX* context) {
991 sha2_word64 *d = (sha2_word64*)digest;
994 assert(context != (SHA384_CTX*)0);
996 /* If no digest buffer is passed, we don't bother doing this: */
997 if (digest != (sha2_byte*)0) {
998 SHA512_Last((SHA512_CTX*)context);
1000 /* Save the hash data for output: */
1001 #if BYTE_ORDER == LITTLE_ENDIAN
1003 /* Convert TO host byte order */
1005 for (j = 0; j < 6; j++) {
1006 REVERSE64(context->state[j],context->state[j]);
1007 *d++ = context->state[j];
1011 bcopy(context->state, d, SHA384_DIGEST_LENGTH);
1015 /* Zero out state data */
1016 bzero(context, sizeof(context));
1019 char *SHA384_End(SHA384_CTX* context, char buffer[]) {
1020 sha2_byte digest[SHA384_DIGEST_LENGTH], *d = digest;
1024 assert(context != (SHA384_CTX*)0);
1026 if (buffer != (char*)0) {
1027 SHA384_Final(digest, context);
1029 for (i = 0; i < SHA384_DIGEST_LENGTH; i++) {
1030 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
1031 *buffer++ = sha2_hex_digits[*d & 0x0f];
1036 bzero(context, sizeof(context));
1038 bzero(digest, SHA384_DIGEST_LENGTH);
1042 char* SHA384_Data(const sha2_byte* data, size_t len, char digest[SHA384_DIGEST_STRING_LENGTH]) {
1045 SHA384_Init(&context);
1046 SHA384_Update(&context, data, len);
1047 return SHA384_End(&context, digest);