4 * AUTHOR: Aaron D. Gifford - http://www.aarongifford.com/
6 * Copyright (c) 2000-2001, Aaron D. Gifford
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the copyright holder nor the names of contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * $Id: sha2.c,v 1.1 2001/11/08 00:01:51 adg Exp adg $
36 #include <string.h> /* memcpy()/memset() or bcopy()/bzero() */
37 #include <assert.h> /* assert() */
42 * Some sanity checking code is included using assert(). On my FreeBSD
43 * system, this additional code can be removed by compiling with NDEBUG
44 * defined. Check your own systems manpage on assert() to see how to
45 * compile WITHOUT the sanity checking code on your system.
47 * UNROLLED TRANSFORM LOOP NOTE:
48 * You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform
49 * loop version for the hash transform rounds (defined using macros
50 * later in this file). Either define on the command line, for example:
52 * cc -DSHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c
56 * #define SHA2_UNROLL_TRANSFORM
61 /*** SHA-256/384/512 Machine Architecture Definitions *****************/
65 * Please make sure that your system defines BYTE_ORDER. If your
66 * architecture is little-endian, make sure it also defines
67 * LITTLE_ENDIAN and that the two (BYTE_ORDER and LITTLE_ENDIAN) are
70 * If your system does not define the above, then you can do so by
73 * #define LITTLE_ENDIAN 1234
74 * #define BIG_ENDIAN 4321
76 * And for little-endian machines, add:
78 * #define BYTE_ORDER LITTLE_ENDIAN
80 * Or for big-endian machines:
82 * #define BYTE_ORDER BIG_ENDIAN
84 * The FreeBSD machine this was written on defines BYTE_ORDER
85 * appropriately by including <sys/types.h> (which in turn includes
86 * <machine/endian.h> where the appropriate definitions are actually
89 #if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN)
90 #error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
94 * Define the followingsha2_* types to types of the correct length on
95 * the native architecture. Most BSD systems and Linux define u_intXX_t
96 * types. Machines with very recent ANSI C headers, can use the
97 * uintXX_t definitions from inttypes.h by defining SHA2_USE_INTTYPES_H
98 * during compile or in the sha.h header file.
100 * Machines that support neither u_intXX_t nor inttypes.h's uintXX_t
101 * will need to define these three typedefs below (and the appropriate
102 * ones in sha.h too) by hand according to their system architecture.
104 * Thank you, Jun-ichiro itojun Hagino, for suggesting using u_intXX_t
105 * types and pointing out recent ANSI C support for uintXX_t in inttypes.h.
107 #ifdef SHA2_USE_INTTYPES_H
109 typedef uint8_t sha2_byte; /* Exactly 1 byte */
110 typedef uint32_t sha2_word32; /* Exactly 4 bytes */
111 typedef uint64_t sha2_word64; /* Exactly 8 bytes */
113 #else /* SHA2_USE_INTTYPES_H */
115 typedef u_int8_t sha2_byte; /* Exactly 1 byte */
116 typedef u_int32_t sha2_word32; /* Exactly 4 bytes */
117 typedef u_int64_t sha2_word64; /* Exactly 8 bytes */
119 #endif /* SHA2_USE_INTTYPES_H */
122 /*** SHA-256/384/512 Various Length Definitions ***********************/
123 /* NOTE: Most of these are in sha2.h */
124 #define SHA256_SHORT_BLOCK_LENGTH (SHA256_BLOCK_LENGTH - 8)
125 #define SHA384_SHORT_BLOCK_LENGTH (SHA384_BLOCK_LENGTH - 16)
126 #define SHA512_SHORT_BLOCK_LENGTH (SHA512_BLOCK_LENGTH - 16)
129 /*** ENDIAN REVERSAL MACROS *******************************************/
130 #if BYTE_ORDER == LITTLE_ENDIAN
131 #define REVERSE32(w,x) { \
132 sha2_word32 tmp = (w); \
133 tmp = (tmp >> 16) | (tmp << 16); \
134 (x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \
136 #define REVERSE64(w,x) { \
137 sha2_word64 tmp = (w); \
138 tmp = (tmp >> 32) | (tmp << 32); \
139 tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
140 ((tmp & 0x00ff00ff00ff00ffULL) << 8); \
141 (x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \
142 ((tmp & 0x0000ffff0000ffffULL) << 16); \
144 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
147 * Macro for incrementally adding the unsigned 64-bit integer n to the
148 * unsigned 128-bit integer (represented using a two-element array of
151 #define ADDINC128(w,n) { \
152 (w)[0] += (sha2_word64)(n); \
153 if ((w)[0] < (n)) { \
159 * Macros for copying blocks of memory and for zeroing out ranges
160 * of memory. Using these macros makes it easy to switch from
161 * using memset()/memcpy() and using bzero()/bcopy().
163 * Please define either SHA2_USE_MEMSET_MEMCPY or define
164 * SHA2_USE_BZERO_BCOPY depending on which function set you
167 #if !defined(SHA2_USE_MEMSET_MEMCPY) && !defined(SHA2_USE_BZERO_BCOPY)
168 /* Default to memset()/memcpy() if no option is specified */
169 #define SHA2_USE_MEMSET_MEMCPY 1
171 #if defined(SHA2_USE_MEMSET_MEMCPY) && defined(SHA2_USE_BZERO_BCOPY)
172 /* Abort with an error if BOTH options are defined */
173 #error Define either SHA2_USE_MEMSET_MEMCPY or SHA2_USE_BZERO_BCOPY, not both!
176 #ifdef SHA2_USE_MEMSET_MEMCPY
177 #define MEMSET_BZERO(p,l) memset((p), 0, (l))
178 #define MEMCPY_BCOPY(d,s,l) memcpy((d), (s), (l))
180 #ifdef SHA2_USE_BZERO_BCOPY
181 #define MEMSET_BZERO(p,l) bzero((p), (l))
182 #define MEMCPY_BCOPY(d,s,l) bcopy((s), (d), (l))
186 /*** THE SIX LOGICAL FUNCTIONS ****************************************/
188 * Bit shifting and rotation (used by the six SHA-XYZ logical functions:
190 * NOTE: The naming of R and S appears backwards here (R is a SHIFT and
191 * S is a ROTATION) because the SHA-256/384/512 description document
192 * (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this
193 * same "backwards" definition.
195 /* Shift-right (used in SHA-256, SHA-384, and SHA-512): */
196 #define R(b,x) ((x) >> (b))
197 /* 32-bit Rotate-right (used in SHA-256): */
198 #define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b))))
199 /* 64-bit Rotate-right (used in SHA-384 and SHA-512): */
200 #define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b))))
202 /* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */
203 #define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
204 #define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
206 /* Four of six logical functions used in SHA-256: */
207 #define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))
208 #define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))
209 #define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x)))
210 #define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))
212 /* Four of six logical functions used in SHA-384 and SHA-512: */
213 #define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
214 #define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
215 #define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x)))
216 #define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x)))
218 /*** INTERNAL FUNCTION PROTOTYPES *************************************/
219 /* NOTE: These should not be accessed directly from outside this
220 * library -- they are intended for private internal visibility/use
223 static void SHA512_Last(SHA512_CTX*);
224 static void SHA256_Transform(SHA256_CTX*, const sha2_word32*);
225 static void SHA512_Transform(SHA512_CTX*, const sha2_word64*);
228 /*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
229 /* Hash constant words K for SHA-256: */
230 const static sha2_word32 K256[64] = {
231 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
232 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
233 0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
234 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
235 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
236 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
237 0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
238 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
239 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
240 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
241 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
242 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
243 0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
244 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
245 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
246 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
249 /* Initial hash value H for SHA-256: */
250 const static sha2_word32 sha256_initial_hash_value[8] = {
261 /* Hash constant words K for SHA-384 and SHA-512: */
262 const static sha2_word64 K512[80] = {
263 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
264 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
265 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
266 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
267 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
268 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
269 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
270 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
271 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
272 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
273 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
274 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
275 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
276 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
277 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
278 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
279 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
280 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
281 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
282 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
283 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
284 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
285 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
286 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
287 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
288 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
289 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
290 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
291 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
292 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
293 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
294 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
295 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
296 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
297 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
298 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
299 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
300 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
301 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
302 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
305 /* Initial hash value H for SHA-384 */
306 const static sha2_word64 sha384_initial_hash_value[8] = {
307 0xcbbb9d5dc1059ed8ULL,
308 0x629a292a367cd507ULL,
309 0x9159015a3070dd17ULL,
310 0x152fecd8f70e5939ULL,
311 0x67332667ffc00b31ULL,
312 0x8eb44a8768581511ULL,
313 0xdb0c2e0d64f98fa7ULL,
314 0x47b5481dbefa4fa4ULL
317 /* Initial hash value H for SHA-512 */
318 const static sha2_word64 sha512_initial_hash_value[8] = {
319 0x6a09e667f3bcc908ULL,
320 0xbb67ae8584caa73bULL,
321 0x3c6ef372fe94f82bULL,
322 0xa54ff53a5f1d36f1ULL,
323 0x510e527fade682d1ULL,
324 0x9b05688c2b3e6c1fULL,
325 0x1f83d9abfb41bd6bULL,
326 0x5be0cd19137e2179ULL
330 * Constant used by SHA256/384/512_End() functions for converting the
331 * digest to a readable hexadecimal character string:
333 static const char *sha2_hex_digits = "0123456789abcdef";
336 /*** SHA-256: *********************************************************/
337 void SHA256_Init(SHA256_CTX* context) {
338 if (context == (SHA256_CTX*)0) {
341 MEMCPY_BCOPY(context->state, sha256_initial_hash_value, SHA256_DIGEST_LENGTH);
342 MEMSET_BZERO(context->buffer, SHA256_BLOCK_LENGTH);
343 context->bitcount = 0;
346 #ifdef SHA2_UNROLL_TRANSFORM
348 /* Unrolled SHA-256 round macros: */
350 #if BYTE_ORDER == LITTLE_ENDIAN
352 #define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
353 REVERSE32(*data++, W256[j]); \
354 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
357 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
361 #else /* BYTE_ORDER == LITTLE_ENDIAN */
363 #define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
364 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
365 K256[j] + (W256[j] = *data++); \
367 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
370 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
372 #define ROUND256(a,b,c,d,e,f,g,h) \
373 s0 = W256[(j+1)&0x0f]; \
374 s0 = sigma0_256(s0); \
375 s1 = W256[(j+14)&0x0f]; \
376 s1 = sigma1_256(s1); \
377 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[j] + \
378 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \
380 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
383 void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
384 sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
385 sha2_word32 T1, *W256;
388 W256 = (sha2_word32*)context->buffer;
390 /* Initialize registers with the prev. intermediate value */
391 a = context->state[0];
392 b = context->state[1];
393 c = context->state[2];
394 d = context->state[3];
395 e = context->state[4];
396 f = context->state[5];
397 g = context->state[6];
398 h = context->state[7];
402 /* Rounds 0 to 15 (unrolled): */
403 ROUND256_0_TO_15(a,b,c,d,e,f,g,h);
404 ROUND256_0_TO_15(h,a,b,c,d,e,f,g);
405 ROUND256_0_TO_15(g,h,a,b,c,d,e,f);
406 ROUND256_0_TO_15(f,g,h,a,b,c,d,e);
407 ROUND256_0_TO_15(e,f,g,h,a,b,c,d);
408 ROUND256_0_TO_15(d,e,f,g,h,a,b,c);
409 ROUND256_0_TO_15(c,d,e,f,g,h,a,b);
410 ROUND256_0_TO_15(b,c,d,e,f,g,h,a);
413 /* Now for the remaining rounds to 64: */
415 ROUND256(a,b,c,d,e,f,g,h);
416 ROUND256(h,a,b,c,d,e,f,g);
417 ROUND256(g,h,a,b,c,d,e,f);
418 ROUND256(f,g,h,a,b,c,d,e);
419 ROUND256(e,f,g,h,a,b,c,d);
420 ROUND256(d,e,f,g,h,a,b,c);
421 ROUND256(c,d,e,f,g,h,a,b);
422 ROUND256(b,c,d,e,f,g,h,a);
425 /* Compute the current intermediate hash value */
426 context->state[0] += a;
427 context->state[1] += b;
428 context->state[2] += c;
429 context->state[3] += d;
430 context->state[4] += e;
431 context->state[5] += f;
432 context->state[6] += g;
433 context->state[7] += h;
436 a = b = c = d = e = f = g = h = T1 = 0;
439 #else /* SHA2_UNROLL_TRANSFORM */
441 void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
442 sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
443 sha2_word32 T1, T2, *W256;
446 W256 = (sha2_word32*)context->buffer;
448 /* Initialize registers with the prev. intermediate value */
449 a = context->state[0];
450 b = context->state[1];
451 c = context->state[2];
452 d = context->state[3];
453 e = context->state[4];
454 f = context->state[5];
455 g = context->state[6];
456 h = context->state[7];
460 #if BYTE_ORDER == LITTLE_ENDIAN
461 /* Copy data while converting to host byte order */
462 REVERSE32(*data++,W256[j]);
463 /* Apply the SHA-256 compression function to update a..h */
464 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];
465 #else /* BYTE_ORDER == LITTLE_ENDIAN */
466 /* Apply the SHA-256 compression function to update a..h with copy */
467 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + (W256[j] = *data++);
468 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
469 T2 = Sigma0_256(a) + Maj(a, b, c);
483 /* Part of the message block expansion: */
484 s0 = W256[(j+1)&0x0f];
486 s1 = W256[(j+14)&0x0f];
489 /* Apply the SHA-256 compression function to update a..h */
490 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] +
491 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0);
492 T2 = Sigma0_256(a) + Maj(a, b, c);
505 /* Compute the current intermediate hash value */
506 context->state[0] += a;
507 context->state[1] += b;
508 context->state[2] += c;
509 context->state[3] += d;
510 context->state[4] += e;
511 context->state[5] += f;
512 context->state[6] += g;
513 context->state[7] += h;
516 a = b = c = d = e = f = g = h = T1 = T2 = 0;
519 #endif /* SHA2_UNROLL_TRANSFORM */
521 void SHA256_Update(SHA256_CTX* context, const sha2_byte *data, size_t len) {
522 unsigned int freespace, usedspace;
525 /* Calling with no data is valid - we do nothing */
530 assert(context != (SHA256_CTX*)0 && data != (sha2_byte*)0);
532 usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
534 /* Calculate how much free space is available in the buffer */
535 freespace = SHA256_BLOCK_LENGTH - usedspace;
537 if (len >= freespace) {
538 /* Fill the buffer completely and process it */
539 MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace);
540 context->bitcount += freespace << 3;
543 SHA256_Transform(context, (sha2_word32*)context->buffer);
545 /* The buffer is not yet full */
546 MEMCPY_BCOPY(&context->buffer[usedspace], data, len);
547 context->bitcount += len << 3;
549 usedspace = freespace = 0;
553 while (len >= SHA256_BLOCK_LENGTH) {
554 /* Process as many complete blocks as we can */
555 SHA256_Transform(context, (sha2_word32*)data);
556 context->bitcount += SHA256_BLOCK_LENGTH << 3;
557 len -= SHA256_BLOCK_LENGTH;
558 data += SHA256_BLOCK_LENGTH;
561 /* There's left-overs, so save 'em */
562 MEMCPY_BCOPY(context->buffer, data, len);
563 context->bitcount += len << 3;
566 usedspace = freespace = 0;
569 void SHA256_Final(sha2_byte digest[], SHA256_CTX* context) {
570 sha2_word32 *d = (sha2_word32*)digest;
572 unsigned int usedspace;
575 assert(context != (SHA256_CTX*)0);
577 /* If no digest buffer is passed, we don't bother doing this: */
578 if (digest != (sha2_byte*)0) {
579 usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
580 #if BYTE_ORDER == LITTLE_ENDIAN
581 /* Convert FROM host byte order */
582 REVERSE64(context->bitcount,context->bitcount);
585 /* Begin padding with a 1 bit: */
586 context->buffer[usedspace++] = 0x80;
588 if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) {
589 /* Set-up for the last transform: */
590 MEMSET_BZERO(&context->buffer[usedspace], SHA256_SHORT_BLOCK_LENGTH - usedspace);
592 if (usedspace < SHA256_BLOCK_LENGTH) {
593 MEMSET_BZERO(&context->buffer[usedspace], SHA256_BLOCK_LENGTH - usedspace);
595 /* Do second-to-last transform: */
596 SHA256_Transform(context, (sha2_word32*)context->buffer);
598 /* And set-up for the last transform: */
599 MEMSET_BZERO(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
602 /* Set-up for the last transform: */
603 MEMSET_BZERO(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
605 /* Begin padding with a 1 bit: */
606 *context->buffer = 0x80;
608 /* Set the bit count: */
609 p = (sha2_word64 *)&context->buffer[SHA256_SHORT_BLOCK_LENGTH];
610 *p = context->bitcount;
612 /* Final transform: */
613 SHA256_Transform(context, (sha2_word32*)context->buffer);
615 #if BYTE_ORDER == LITTLE_ENDIAN
617 /* Convert TO host byte order */
619 for (j = 0; j < 8; j++) {
620 REVERSE32(context->state[j],context->state[j]);
621 *d++ = context->state[j];
625 MEMCPY_BCOPY(d, context->state, SHA256_DIGEST_LENGTH);
629 /* Clean up state data: */
630 MEMSET_BZERO(context, sizeof(*context));
634 char *SHA256_End(SHA256_CTX* context, char buffer[]) {
635 sha2_byte digest[SHA256_DIGEST_LENGTH], *d = digest;
639 assert(context != (SHA256_CTX*)0);
641 if (buffer != (char*)0) {
642 SHA256_Final(digest, context);
644 for (i = 0; i < SHA256_DIGEST_LENGTH; i++) {
645 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
646 *buffer++ = sha2_hex_digits[*d & 0x0f];
651 MEMSET_BZERO(context, sizeof(*context));
653 MEMSET_BZERO(digest, SHA256_DIGEST_LENGTH);
657 char* SHA256_Data(const sha2_byte* data, size_t len, char digest[SHA256_DIGEST_STRING_LENGTH]) {
660 SHA256_Init(&context);
661 SHA256_Update(&context, data, len);
662 return SHA256_End(&context, digest);
666 /*** SHA-512: *********************************************************/
667 void SHA512_Init(SHA512_CTX* context) {
668 if (context == (SHA512_CTX*)0) {
671 MEMCPY_BCOPY(context->state, sha512_initial_hash_value, SHA512_DIGEST_LENGTH);
672 MEMSET_BZERO(context->buffer, SHA512_BLOCK_LENGTH);
673 context->bitcount[0] = context->bitcount[1] = 0;
676 #ifdef SHA2_UNROLL_TRANSFORM
678 /* Unrolled SHA-512 round macros: */
679 #if BYTE_ORDER == LITTLE_ENDIAN
681 #define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
682 REVERSE64(*data++, W512[j]); \
683 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
686 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)), \
690 #else /* BYTE_ORDER == LITTLE_ENDIAN */
692 #define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
693 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
694 K512[j] + (W512[j] = *data++); \
696 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
699 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
701 #define ROUND512(a,b,c,d,e,f,g,h) \
702 s0 = W512[(j+1)&0x0f]; \
703 s0 = sigma0_512(s0); \
704 s1 = W512[(j+14)&0x0f]; \
705 s1 = sigma1_512(s1); \
706 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[j] + \
707 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \
709 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
712 void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
713 sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
714 sha2_word64 T1, *W512 = (sha2_word64*)context->buffer;
717 /* Initialize registers with the prev. intermediate value */
718 a = context->state[0];
719 b = context->state[1];
720 c = context->state[2];
721 d = context->state[3];
722 e = context->state[4];
723 f = context->state[5];
724 g = context->state[6];
725 h = context->state[7];
729 ROUND512_0_TO_15(a,b,c,d,e,f,g,h);
730 ROUND512_0_TO_15(h,a,b,c,d,e,f,g);
731 ROUND512_0_TO_15(g,h,a,b,c,d,e,f);
732 ROUND512_0_TO_15(f,g,h,a,b,c,d,e);
733 ROUND512_0_TO_15(e,f,g,h,a,b,c,d);
734 ROUND512_0_TO_15(d,e,f,g,h,a,b,c);
735 ROUND512_0_TO_15(c,d,e,f,g,h,a,b);
736 ROUND512_0_TO_15(b,c,d,e,f,g,h,a);
739 /* Now for the remaining rounds up to 79: */
741 ROUND512(a,b,c,d,e,f,g,h);
742 ROUND512(h,a,b,c,d,e,f,g);
743 ROUND512(g,h,a,b,c,d,e,f);
744 ROUND512(f,g,h,a,b,c,d,e);
745 ROUND512(e,f,g,h,a,b,c,d);
746 ROUND512(d,e,f,g,h,a,b,c);
747 ROUND512(c,d,e,f,g,h,a,b);
748 ROUND512(b,c,d,e,f,g,h,a);
751 /* Compute the current intermediate hash value */
752 context->state[0] += a;
753 context->state[1] += b;
754 context->state[2] += c;
755 context->state[3] += d;
756 context->state[4] += e;
757 context->state[5] += f;
758 context->state[6] += g;
759 context->state[7] += h;
762 a = b = c = d = e = f = g = h = T1 = 0;
765 #else /* SHA2_UNROLL_TRANSFORM */
767 void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
768 sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
769 sha2_word64 T1, T2, *W512 = (sha2_word64*)context->buffer;
772 /* Initialize registers with the prev. intermediate value */
773 a = context->state[0];
774 b = context->state[1];
775 c = context->state[2];
776 d = context->state[3];
777 e = context->state[4];
778 f = context->state[5];
779 g = context->state[6];
780 h = context->state[7];
784 #if BYTE_ORDER == LITTLE_ENDIAN
785 /* Convert TO host byte order */
786 REVERSE64(*data++, W512[j]);
787 /* Apply the SHA-512 compression function to update a..h */
788 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];
789 #else /* BYTE_ORDER == LITTLE_ENDIAN */
790 /* Apply the SHA-512 compression function to update a..h with copy */
791 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + (W512[j] = *data++);
792 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
793 T2 = Sigma0_512(a) + Maj(a, b, c);
807 /* Part of the message block expansion: */
808 s0 = W512[(j+1)&0x0f];
810 s1 = W512[(j+14)&0x0f];
813 /* Apply the SHA-512 compression function to update a..h */
814 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +
815 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0);
816 T2 = Sigma0_512(a) + Maj(a, b, c);
829 /* Compute the current intermediate hash value */
830 context->state[0] += a;
831 context->state[1] += b;
832 context->state[2] += c;
833 context->state[3] += d;
834 context->state[4] += e;
835 context->state[5] += f;
836 context->state[6] += g;
837 context->state[7] += h;
840 a = b = c = d = e = f = g = h = T1 = T2 = 0;
843 #endif /* SHA2_UNROLL_TRANSFORM */
845 void SHA512_Update(SHA512_CTX* context, const sha2_byte *data, size_t len) {
846 unsigned int freespace, usedspace;
849 /* Calling with no data is valid - we do nothing */
854 assert(context != (SHA512_CTX*)0 && data != (sha2_byte*)0);
856 usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
858 /* Calculate how much free space is available in the buffer */
859 freespace = SHA512_BLOCK_LENGTH - usedspace;
861 if (len >= freespace) {
862 /* Fill the buffer completely and process it */
863 MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace);
864 ADDINC128(context->bitcount, freespace << 3);
867 SHA512_Transform(context, (sha2_word64*)context->buffer);
869 /* The buffer is not yet full */
870 MEMCPY_BCOPY(&context->buffer[usedspace], data, len);
871 ADDINC128(context->bitcount, len << 3);
873 usedspace = freespace = 0;
877 while (len >= SHA512_BLOCK_LENGTH) {
878 /* Process as many complete blocks as we can */
879 SHA512_Transform(context, (sha2_word64*)data);
880 ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
881 len -= SHA512_BLOCK_LENGTH;
882 data += SHA512_BLOCK_LENGTH;
885 /* There's left-overs, so save 'em */
886 MEMCPY_BCOPY(context->buffer, data, len);
887 ADDINC128(context->bitcount, len << 3);
890 usedspace = freespace = 0;
893 void SHA512_Last(SHA512_CTX* context) {
895 unsigned int usedspace;
897 usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
898 #if BYTE_ORDER == LITTLE_ENDIAN
899 /* Convert FROM host byte order */
900 REVERSE64(context->bitcount[0],context->bitcount[0]);
901 REVERSE64(context->bitcount[1],context->bitcount[1]);
904 /* Begin padding with a 1 bit: */
905 context->buffer[usedspace++] = 0x80;
907 if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) {
908 /* Set-up for the last transform: */
909 MEMSET_BZERO(&context->buffer[usedspace], SHA512_SHORT_BLOCK_LENGTH - usedspace);
911 if (usedspace < SHA512_BLOCK_LENGTH) {
912 MEMSET_BZERO(&context->buffer[usedspace], SHA512_BLOCK_LENGTH - usedspace);
914 /* Do second-to-last transform: */
915 SHA512_Transform(context, (sha2_word64*)context->buffer);
917 /* And set-up for the last transform: */
918 MEMSET_BZERO(context->buffer, SHA512_BLOCK_LENGTH - 2);
921 /* Prepare for final transform: */
922 MEMSET_BZERO(context->buffer, SHA512_SHORT_BLOCK_LENGTH);
924 /* Begin padding with a 1 bit: */
925 *context->buffer = 0x80;
927 /* Store the length of input data (in bits): */
928 p = (sha2_word64 *)&context->buffer[SHA512_SHORT_BLOCK_LENGTH];
929 p[0] = context->bitcount[1];
930 p[1] = context->bitcount[0];
932 /* Final transform: */
933 SHA512_Transform(context, (sha2_word64*)context->buffer);
936 void SHA512_Final(sha2_byte digest[], SHA512_CTX* context) {
937 sha2_word64 *d = (sha2_word64*)digest;
940 assert(context != (SHA512_CTX*)0);
942 /* If no digest buffer is passed, we don't bother doing this: */
943 if (digest != (sha2_byte*)0) {
944 SHA512_Last(context);
946 /* Save the hash data for output: */
947 #if BYTE_ORDER == LITTLE_ENDIAN
949 /* Convert TO host byte order */
951 for (j = 0; j < 8; j++) {
952 REVERSE64(context->state[j],context->state[j]);
953 *d++ = context->state[j];
957 MEMCPY_BCOPY(d, context->state, SHA512_DIGEST_LENGTH);
961 /* Zero out state data */
962 MEMSET_BZERO(context, sizeof(*context));
965 char *SHA512_End(SHA512_CTX* context, char buffer[]) {
966 sha2_byte digest[SHA512_DIGEST_LENGTH], *d = digest;
970 assert(context != (SHA512_CTX*)0);
972 if (buffer != (char*)0) {
973 SHA512_Final(digest, context);
975 for (i = 0; i < SHA512_DIGEST_LENGTH; i++) {
976 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
977 *buffer++ = sha2_hex_digits[*d & 0x0f];
982 MEMSET_BZERO(context, sizeof(*context));
984 MEMSET_BZERO(digest, SHA512_DIGEST_LENGTH);
988 char* SHA512_Data(const sha2_byte* data, size_t len, char digest[SHA512_DIGEST_STRING_LENGTH]) {
991 SHA512_Init(&context);
992 SHA512_Update(&context, data, len);
993 return SHA512_End(&context, digest);
997 /*** SHA-384: *********************************************************/
998 void SHA384_Init(SHA384_CTX* context) {
999 if (context == (SHA384_CTX*)0) {
1002 MEMCPY_BCOPY(context->state, sha384_initial_hash_value, SHA512_DIGEST_LENGTH);
1003 MEMSET_BZERO(context->buffer, SHA384_BLOCK_LENGTH);
1004 context->bitcount[0] = context->bitcount[1] = 0;
1007 void SHA384_Update(SHA384_CTX* context, const sha2_byte* data, size_t len) {
1008 SHA512_Update((SHA512_CTX*)context, data, len);
1011 void SHA384_Final(sha2_byte digest[], SHA384_CTX* context) {
1012 sha2_word64 *d = (sha2_word64*)digest;
1015 assert(context != (SHA384_CTX*)0);
1017 /* If no digest buffer is passed, we don't bother doing this: */
1018 if (digest != (sha2_byte*)0) {
1019 SHA512_Last((SHA512_CTX*)context);
1021 /* Save the hash data for output: */
1022 #if BYTE_ORDER == LITTLE_ENDIAN
1024 /* Convert TO host byte order */
1026 for (j = 0; j < 6; j++) {
1027 REVERSE64(context->state[j],context->state[j]);
1028 *d++ = context->state[j];
1032 MEMCPY_BCOPY(d, context->state, SHA384_DIGEST_LENGTH);
1036 /* Zero out state data */
1037 MEMSET_BZERO(context, sizeof(*context));
1040 char *SHA384_End(SHA384_CTX* context, char buffer[]) {
1041 sha2_byte digest[SHA384_DIGEST_LENGTH], *d = digest;
1045 assert(context != (SHA384_CTX*)0);
1047 if (buffer != (char*)0) {
1048 SHA384_Final(digest, context);
1050 for (i = 0; i < SHA384_DIGEST_LENGTH; i++) {
1051 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
1052 *buffer++ = sha2_hex_digits[*d & 0x0f];
1057 MEMSET_BZERO(context, sizeof(*context));
1059 MEMSET_BZERO(digest, SHA384_DIGEST_LENGTH);
1063 char* SHA384_Data(const sha2_byte* data, size_t len, char digest[SHA384_DIGEST_STRING_LENGTH]) {
1066 SHA384_Init(&context);
1067 SHA384_Update(&context, data, len);
1068 return SHA384_End(&context, digest);