ldns/drill: Update vendor branch to 1.6.9
[dragonfly.git] / contrib / ldns / sha2.c
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1/*
2 * FILE: sha2.c
3 * AUTHOR: Aaron D. Gifford - http://www.aarongifford.com/
4 *
5 * Copyright (c) 2000-2001, Aaron D. Gifford
6 * All rights reserved.
7 *
8 * Modified by Jelte Jansen to fit in ldns, and not clash with any
9 * system-defined SHA code.
10 * Changes:
11 * - Renamed (external) functions and constants to fit ldns style
12 * - Removed _End and _Data functions
13 * - Added ldns_shaX(data, len, digest) convenience functions
14 * - Removed prototypes of _Transform functions and made those static
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the copyright holder nor the names of contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * $Id: sha2.c,v 1.1 2001/11/08 00:01:51 adg Exp adg $
41 */
42
43#include <ldns/config.h>
44#include <string.h> /* memcpy()/memset() or bcopy()/bzero() */
45#include <assert.h> /* assert() */
46#include <ldns/sha2.h>
47
48/*
49 * ASSERT NOTE:
50 * Some sanity checking code is included using assert(). On my FreeBSD
51 * system, this additional code can be removed by compiling with NDEBUG
52 * defined. Check your own systems manpage on assert() to see how to
53 * compile WITHOUT the sanity checking code on your system.
54 *
55 * UNROLLED TRANSFORM LOOP NOTE:
56 * You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform
57 * loop version for the hash transform rounds (defined using macros
58 * later in this file). Either define on the command line, for example:
59 *
60 * cc -DSHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c
61 *
62 * or define below:
63 *
64 * #define SHA2_UNROLL_TRANSFORM
65 *
66 */
67
68
69/*** SHA-256/384/512 Machine Architecture Definitions *****************/
70/*
71 * BYTE_ORDER NOTE:
72 *
73 * Please make sure that your system defines BYTE_ORDER. If your
74 * architecture is little-endian, make sure it also defines
75 * LITTLE_ENDIAN and that the two (BYTE_ORDER and LITTLE_ENDIAN) are
76 * equivilent.
77 *
78 * If your system does not define the above, then you can do so by
79 * hand like this:
80 *
81 * #define LITTLE_ENDIAN 1234
82 * #define BIG_ENDIAN 4321
83 *
84 * And for little-endian machines, add:
85 *
86 * #define BYTE_ORDER LITTLE_ENDIAN
87 *
88 * Or for big-endian machines:
89 *
90 * #define BYTE_ORDER BIG_ENDIAN
91 *
92 * The FreeBSD machine this was written on defines BYTE_ORDER
93 * appropriately by including <sys/types.h> (which in turn includes
94 * <machine/endian.h> where the appropriate definitions are actually
95 * made).
96 */
97#if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN)
98#error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
99#endif
100
101typedef uint8_t sha2_byte; /* Exactly 1 byte */
102typedef uint32_t sha2_word32; /* Exactly 4 bytes */
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103#ifdef S_SPLINT_S
104typedef unsigned long long sha2_word64; /* lint 8 bytes */
105#else
825eb42b 106typedef uint64_t sha2_word64; /* Exactly 8 bytes */
fd185f4d 107#endif
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108
109/*** SHA-256/384/512 Various Length Definitions ***********************/
110/* NOTE: Most of these are in sha2.h */
111#define ldns_sha256_SHORT_BLOCK_LENGTH (LDNS_SHA256_BLOCK_LENGTH - 8)
112#define ldns_sha384_SHORT_BLOCK_LENGTH (LDNS_SHA384_BLOCK_LENGTH - 16)
113#define ldns_sha512_SHORT_BLOCK_LENGTH (LDNS_SHA512_BLOCK_LENGTH - 16)
114
115
116/*** ENDIAN REVERSAL MACROS *******************************************/
117#if BYTE_ORDER == LITTLE_ENDIAN
118#define REVERSE32(w,x) { \
119 sha2_word32 tmp = (w); \
120 tmp = (tmp >> 16) | (tmp << 16); \
121 (x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \
122}
fd185f4d 123#ifndef S_SPLINT_S
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124#define REVERSE64(w,x) { \
125 sha2_word64 tmp = (w); \
126 tmp = (tmp >> 32) | (tmp << 32); \
127 tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
128 ((tmp & 0x00ff00ff00ff00ffULL) << 8); \
129 (x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \
130 ((tmp & 0x0000ffff0000ffffULL) << 16); \
131}
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132#else /* splint */
133#define REVERSE64(w,x) /* splint */
134#endif /* splint */
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135#endif /* BYTE_ORDER == LITTLE_ENDIAN */
136
137/*
138 * Macro for incrementally adding the unsigned 64-bit integer n to the
139 * unsigned 128-bit integer (represented using a two-element array of
140 * 64-bit words):
141 */
142#define ADDINC128(w,n) { \
143 (w)[0] += (sha2_word64)(n); \
144 if ((w)[0] < (n)) { \
145 (w)[1]++; \
146 } \
147}
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148#ifdef S_SPLINT_S
149#undef ADDINC128
150#define ADDINC128(w,n) /* splint */
151#endif
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152
153/*
154 * Macros for copying blocks of memory and for zeroing out ranges
155 * of memory. Using these macros makes it easy to switch from
156 * using memset()/memcpy() and using bzero()/bcopy().
157 *
158 * Please define either SHA2_USE_MEMSET_MEMCPY or define
159 * SHA2_USE_BZERO_BCOPY depending on which function set you
160 * choose to use:
161 */
162#if !defined(SHA2_USE_MEMSET_MEMCPY) && !defined(SHA2_USE_BZERO_BCOPY)
163/* Default to memset()/memcpy() if no option is specified */
164#define SHA2_USE_MEMSET_MEMCPY 1
165#endif
166#if defined(SHA2_USE_MEMSET_MEMCPY) && defined(SHA2_USE_BZERO_BCOPY)
167/* Abort with an error if BOTH options are defined */
168#error Define either SHA2_USE_MEMSET_MEMCPY or SHA2_USE_BZERO_BCOPY, not both!
169#endif
170
171#ifdef SHA2_USE_MEMSET_MEMCPY
172#define MEMSET_BZERO(p,l) memset((p), 0, (l))
173#define MEMCPY_BCOPY(d,s,l) memcpy((d), (s), (l))
174#endif
175#ifdef SHA2_USE_BZERO_BCOPY
176#define MEMSET_BZERO(p,l) bzero((p), (l))
177#define MEMCPY_BCOPY(d,s,l) bcopy((s), (d), (l))
178#endif
179
180
181/*** THE SIX LOGICAL FUNCTIONS ****************************************/
182/*
183 * Bit shifting and rotation (used by the six SHA-XYZ logical functions:
184 *
185 * NOTE: The naming of R and S appears backwards here (R is a SHIFT and
186 * S is a ROTATION) because the SHA-256/384/512 description document
187 * (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this
188 * same "backwards" definition.
189 */
190/* Shift-right (used in SHA-256, SHA-384, and SHA-512): */
191#define R(b,x) ((x) >> (b))
192/* 32-bit Rotate-right (used in SHA-256): */
193#define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b))))
194/* 64-bit Rotate-right (used in SHA-384 and SHA-512): */
195#define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b))))
196
197/* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */
198#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
199#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
200
201/* Four of six logical functions used in SHA-256: */
202#define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))
203#define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))
204#define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x)))
205#define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))
206
207/* Four of six logical functions used in SHA-384 and SHA-512: */
208#define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
209#define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
210#define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x)))
211#define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x)))
212
213/*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
214/* Hash constant words K for SHA-256: */
215static const sha2_word32 K256[64] = {
216 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
217 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
218 0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
219 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
220 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
221 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
222 0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
223 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
224 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
225 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
226 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
227 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
228 0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
229 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
230 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
231 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
232};
233
234/* initial hash value H for SHA-256: */
235static const sha2_word32 ldns_sha256_initial_hash_value[8] = {
236 0x6a09e667UL,
237 0xbb67ae85UL,
238 0x3c6ef372UL,
239 0xa54ff53aUL,
240 0x510e527fUL,
241 0x9b05688cUL,
242 0x1f83d9abUL,
243 0x5be0cd19UL
244};
245
246/* Hash constant words K for SHA-384 and SHA-512: */
247static const sha2_word64 K512[80] = {
248 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
249 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
250 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
251 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
252 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
253 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
254 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
255 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
256 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
257 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
258 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
259 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
260 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
261 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
262 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
263 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
264 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
265 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
266 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
267 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
268 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
269 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
270 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
271 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
272 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
273 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
274 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
275 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
276 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
277 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
278 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
279 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
280 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
281 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
282 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
283 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
284 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
285 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
286 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
287 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
288};
289
290/* initial hash value H for SHA-384 */
291static const sha2_word64 sha384_initial_hash_value[8] = {
292 0xcbbb9d5dc1059ed8ULL,
293 0x629a292a367cd507ULL,
294 0x9159015a3070dd17ULL,
295 0x152fecd8f70e5939ULL,
296 0x67332667ffc00b31ULL,
297 0x8eb44a8768581511ULL,
298 0xdb0c2e0d64f98fa7ULL,
299 0x47b5481dbefa4fa4ULL
300};
301
302/* initial hash value H for SHA-512 */
303static const sha2_word64 sha512_initial_hash_value[8] = {
304 0x6a09e667f3bcc908ULL,
305 0xbb67ae8584caa73bULL,
306 0x3c6ef372fe94f82bULL,
307 0xa54ff53a5f1d36f1ULL,
308 0x510e527fade682d1ULL,
309 0x9b05688c2b3e6c1fULL,
310 0x1f83d9abfb41bd6bULL,
311 0x5be0cd19137e2179ULL
312};
313
314/*** SHA-256: *********************************************************/
315void ldns_sha256_init(ldns_sha256_CTX* context) {
316 if (context == (ldns_sha256_CTX*)0) {
317 return;
318 }
319 MEMCPY_BCOPY(context->state, ldns_sha256_initial_hash_value, LDNS_SHA256_DIGEST_LENGTH);
320 MEMSET_BZERO(context->buffer, LDNS_SHA256_BLOCK_LENGTH);
321 context->bitcount = 0;
322}
323
324#ifdef SHA2_UNROLL_TRANSFORM
325
326/* Unrolled SHA-256 round macros: */
327
328#if BYTE_ORDER == LITTLE_ENDIAN
329
330#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
331 REVERSE32(*data++, W256[j]); \
332 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
333 K256[j] + W256[j]; \
334 (d) += T1; \
335 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
336 j++
337
338
339#else /* BYTE_ORDER == LITTLE_ENDIAN */
340
341#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
342 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
343 K256[j] + (W256[j] = *data++); \
344 (d) += T1; \
345 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
346 j++
347
348#endif /* BYTE_ORDER == LITTLE_ENDIAN */
349
350#define ROUND256(a,b,c,d,e,f,g,h) \
351 s0 = W256[(j+1)&0x0f]; \
352 s0 = sigma0_256(s0); \
353 s1 = W256[(j+14)&0x0f]; \
354 s1 = sigma1_256(s1); \
355 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[j] + \
356 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \
357 (d) += T1; \
358 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
359 j++
360
361static void ldns_sha256_Transform(ldns_sha256_CTX* context,
362 const sha2_word32* data) {
363 sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
364 sha2_word32 T1, *W256;
365 int j;
366
367 W256 = (sha2_word32*)context->buffer;
368
369 /* initialize registers with the prev. intermediate value */
370 a = context->state[0];
371 b = context->state[1];
372 c = context->state[2];
373 d = context->state[3];
374 e = context->state[4];
375 f = context->state[5];
376 g = context->state[6];
377 h = context->state[7];
378
379 j = 0;
380 do {
381 /* Rounds 0 to 15 (unrolled): */
382 ROUND256_0_TO_15(a,b,c,d,e,f,g,h);
383 ROUND256_0_TO_15(h,a,b,c,d,e,f,g);
384 ROUND256_0_TO_15(g,h,a,b,c,d,e,f);
385 ROUND256_0_TO_15(f,g,h,a,b,c,d,e);
386 ROUND256_0_TO_15(e,f,g,h,a,b,c,d);
387 ROUND256_0_TO_15(d,e,f,g,h,a,b,c);
388 ROUND256_0_TO_15(c,d,e,f,g,h,a,b);
389 ROUND256_0_TO_15(b,c,d,e,f,g,h,a);
390 } while (j < 16);
391
392 /* Now for the remaining rounds to 64: */
393 do {
394 ROUND256(a,b,c,d,e,f,g,h);
395 ROUND256(h,a,b,c,d,e,f,g);
396 ROUND256(g,h,a,b,c,d,e,f);
397 ROUND256(f,g,h,a,b,c,d,e);
398 ROUND256(e,f,g,h,a,b,c,d);
399 ROUND256(d,e,f,g,h,a,b,c);
400 ROUND256(c,d,e,f,g,h,a,b);
401 ROUND256(b,c,d,e,f,g,h,a);
402 } while (j < 64);
403
404 /* Compute the current intermediate hash value */
405 context->state[0] += a;
406 context->state[1] += b;
407 context->state[2] += c;
408 context->state[3] += d;
409 context->state[4] += e;
410 context->state[5] += f;
411 context->state[6] += g;
412 context->state[7] += h;
413
414 /* Clean up */
415 a = b = c = d = e = f = g = h = T1 = 0;
416}
417
418#else /* SHA2_UNROLL_TRANSFORM */
419
420static void ldns_sha256_Transform(ldns_sha256_CTX* context,
421 const sha2_word32* data) {
422 sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
423 sha2_word32 T1, T2, *W256;
424 int j;
425
426 W256 = (sha2_word32*)context->buffer;
427
428 /* initialize registers with the prev. intermediate value */
429 a = context->state[0];
430 b = context->state[1];
431 c = context->state[2];
432 d = context->state[3];
433 e = context->state[4];
434 f = context->state[5];
435 g = context->state[6];
436 h = context->state[7];
437
438 j = 0;
439 do {
440#if BYTE_ORDER == LITTLE_ENDIAN
441 /* Copy data while converting to host byte order */
442 REVERSE32(*data++,W256[j]);
443 /* Apply the SHA-256 compression function to update a..h */
444 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];
445#else /* BYTE_ORDER == LITTLE_ENDIAN */
446 /* Apply the SHA-256 compression function to update a..h with copy */
447 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + (W256[j] = *data++);
448#endif /* BYTE_ORDER == LITTLE_ENDIAN */
449 T2 = Sigma0_256(a) + Maj(a, b, c);
450 h = g;
451 g = f;
452 f = e;
453 e = d + T1;
454 d = c;
455 c = b;
456 b = a;
457 a = T1 + T2;
458
459 j++;
460 } while (j < 16);
461
462 do {
463 /* Part of the message block expansion: */
464 s0 = W256[(j+1)&0x0f];
465 s0 = sigma0_256(s0);
466 s1 = W256[(j+14)&0x0f];
467 s1 = sigma1_256(s1);
468
469 /* Apply the SHA-256 compression function to update a..h */
470 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] +
471 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0);
472 T2 = Sigma0_256(a) + Maj(a, b, c);
473 h = g;
474 g = f;
475 f = e;
476 e = d + T1;
477 d = c;
478 c = b;
479 b = a;
480 a = T1 + T2;
481
482 j++;
483 } while (j < 64);
484
485 /* Compute the current intermediate hash value */
486 context->state[0] += a;
487 context->state[1] += b;
488 context->state[2] += c;
489 context->state[3] += d;
490 context->state[4] += e;
491 context->state[5] += f;
492 context->state[6] += g;
493 context->state[7] += h;
494
495 /* Clean up */
496 a = b = c = d = e = f = g = h = T1 = T2 = 0;
497}
498
499#endif /* SHA2_UNROLL_TRANSFORM */
500
501void ldns_sha256_update(ldns_sha256_CTX* context, const sha2_byte *data, size_t len) {
fd185f4d 502 size_t freespace, usedspace;
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503
504 if (len == 0) {
505 /* Calling with no data is valid - we do nothing */
506 return;
507 }
508
509 /* Sanity check: */
510 assert(context != (ldns_sha256_CTX*)0 && data != (sha2_byte*)0);
511
512 usedspace = (context->bitcount >> 3) % LDNS_SHA256_BLOCK_LENGTH;
513 if (usedspace > 0) {
514 /* Calculate how much free space is available in the buffer */
515 freespace = LDNS_SHA256_BLOCK_LENGTH - usedspace;
516
517 if (len >= freespace) {
518 /* Fill the buffer completely and process it */
519 MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace);
520 context->bitcount += freespace << 3;
521 len -= freespace;
522 data += freespace;
523 ldns_sha256_Transform(context, (sha2_word32*)context->buffer);
524 } else {
525 /* The buffer is not yet full */
526 MEMCPY_BCOPY(&context->buffer[usedspace], data, len);
527 context->bitcount += len << 3;
528 /* Clean up: */
529 usedspace = freespace = 0;
530 return;
531 }
532 }
533 while (len >= LDNS_SHA256_BLOCK_LENGTH) {
534 /* Process as many complete blocks as we can */
535 ldns_sha256_Transform(context, (sha2_word32*)data);
536 context->bitcount += LDNS_SHA256_BLOCK_LENGTH << 3;
537 len -= LDNS_SHA256_BLOCK_LENGTH;
538 data += LDNS_SHA256_BLOCK_LENGTH;
539 }
540 if (len > 0) {
541 /* There's left-overs, so save 'em */
542 MEMCPY_BCOPY(context->buffer, data, len);
543 context->bitcount += len << 3;
544 }
545 /* Clean up: */
546 usedspace = freespace = 0;
547}
548
549void ldns_sha256_final(sha2_byte digest[], ldns_sha256_CTX* context) {
550 sha2_word32 *d = (sha2_word32*)digest;
fd185f4d 551 size_t usedspace;
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552
553 /* Sanity check: */
554 assert(context != (ldns_sha256_CTX*)0);
555
556 /* If no digest buffer is passed, we don't bother doing this: */
557 if (digest != (sha2_byte*)0) {
558 usedspace = (context->bitcount >> 3) % LDNS_SHA256_BLOCK_LENGTH;
559#if BYTE_ORDER == LITTLE_ENDIAN
560 /* Convert FROM host byte order */
561 REVERSE64(context->bitcount,context->bitcount);
562#endif
563 if (usedspace > 0) {
564 /* Begin padding with a 1 bit: */
565 context->buffer[usedspace++] = 0x80;
566
567 if (usedspace <= ldns_sha256_SHORT_BLOCK_LENGTH) {
568 /* Set-up for the last transform: */
569 MEMSET_BZERO(&context->buffer[usedspace], ldns_sha256_SHORT_BLOCK_LENGTH - usedspace);
570 } else {
571 if (usedspace < LDNS_SHA256_BLOCK_LENGTH) {
572 MEMSET_BZERO(&context->buffer[usedspace], LDNS_SHA256_BLOCK_LENGTH - usedspace);
573 }
574 /* Do second-to-last transform: */
575 ldns_sha256_Transform(context, (sha2_word32*)context->buffer);
576
577 /* And set-up for the last transform: */
578 MEMSET_BZERO(context->buffer, ldns_sha256_SHORT_BLOCK_LENGTH);
579 }
580 } else {
581 /* Set-up for the last transform: */
582 MEMSET_BZERO(context->buffer, ldns_sha256_SHORT_BLOCK_LENGTH);
583
584 /* Begin padding with a 1 bit: */
585 *context->buffer = 0x80;
586 }
587 /* Set the bit count: */
588 *(sha2_word64*)&context->buffer[ldns_sha256_SHORT_BLOCK_LENGTH] = context->bitcount;
589
590 /* final transform: */
591 ldns_sha256_Transform(context, (sha2_word32*)context->buffer);
592
593#if BYTE_ORDER == LITTLE_ENDIAN
594 {
595 /* Convert TO host byte order */
596 int j;
597 for (j = 0; j < 8; j++) {
598 REVERSE32(context->state[j],context->state[j]);
599 *d++ = context->state[j];
600 }
601 }
602#else
603 MEMCPY_BCOPY(d, context->state, LDNS_SHA256_DIGEST_LENGTH);
604#endif
605 }
606
607 /* Clean up state data: */
608 MEMSET_BZERO(context, sizeof(context));
609 usedspace = 0;
610}
611
612unsigned char *
613ldns_sha256(unsigned char *data, unsigned int data_len, unsigned char *digest)
614{
615 ldns_sha256_CTX ctx;
616 ldns_sha256_init(&ctx);
617 ldns_sha256_update(&ctx, data, data_len);
618 ldns_sha256_final(digest, &ctx);
619 return digest;
620}
621
622/*** SHA-512: *********************************************************/
623void ldns_sha512_init(ldns_sha512_CTX* context) {
624 if (context == (ldns_sha512_CTX*)0) {
625 return;
626 }
627 MEMCPY_BCOPY(context->state, sha512_initial_hash_value, LDNS_SHA512_DIGEST_LENGTH);
628 MEMSET_BZERO(context->buffer, LDNS_SHA512_BLOCK_LENGTH);
629 context->bitcount[0] = context->bitcount[1] = 0;
630}
631
632#ifdef SHA2_UNROLL_TRANSFORM
633
634/* Unrolled SHA-512 round macros: */
635#if BYTE_ORDER == LITTLE_ENDIAN
636
637#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
638 REVERSE64(*data++, W512[j]); \
639 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
640 K512[j] + W512[j]; \
641 (d) += T1, \
642 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)), \
643 j++
644
645
646#else /* BYTE_ORDER == LITTLE_ENDIAN */
647
648#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
649 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
650 K512[j] + (W512[j] = *data++); \
651 (d) += T1; \
652 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
653 j++
654
655#endif /* BYTE_ORDER == LITTLE_ENDIAN */
656
657#define ROUND512(a,b,c,d,e,f,g,h) \
658 s0 = W512[(j+1)&0x0f]; \
659 s0 = sigma0_512(s0); \
660 s1 = W512[(j+14)&0x0f]; \
661 s1 = sigma1_512(s1); \
662 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[j] + \
663 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \
664 (d) += T1; \
665 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
666 j++
667
668static void ldns_sha512_Transform(ldns_sha512_CTX* context,
669 const sha2_word64* data) {
670 sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
671 sha2_word64 T1, *W512 = (sha2_word64*)context->buffer;
672 int j;
673
674 /* initialize registers with the prev. intermediate value */
675 a = context->state[0];
676 b = context->state[1];
677 c = context->state[2];
678 d = context->state[3];
679 e = context->state[4];
680 f = context->state[5];
681 g = context->state[6];
682 h = context->state[7];
683
684 j = 0;
685 do {
686 ROUND512_0_TO_15(a,b,c,d,e,f,g,h);
687 ROUND512_0_TO_15(h,a,b,c,d,e,f,g);
688 ROUND512_0_TO_15(g,h,a,b,c,d,e,f);
689 ROUND512_0_TO_15(f,g,h,a,b,c,d,e);
690 ROUND512_0_TO_15(e,f,g,h,a,b,c,d);
691 ROUND512_0_TO_15(d,e,f,g,h,a,b,c);
692 ROUND512_0_TO_15(c,d,e,f,g,h,a,b);
693 ROUND512_0_TO_15(b,c,d,e,f,g,h,a);
694 } while (j < 16);
695
696 /* Now for the remaining rounds up to 79: */
697 do {
698 ROUND512(a,b,c,d,e,f,g,h);
699 ROUND512(h,a,b,c,d,e,f,g);
700 ROUND512(g,h,a,b,c,d,e,f);
701 ROUND512(f,g,h,a,b,c,d,e);
702 ROUND512(e,f,g,h,a,b,c,d);
703 ROUND512(d,e,f,g,h,a,b,c);
704 ROUND512(c,d,e,f,g,h,a,b);
705 ROUND512(b,c,d,e,f,g,h,a);
706 } while (j < 80);
707
708 /* Compute the current intermediate hash value */
709 context->state[0] += a;
710 context->state[1] += b;
711 context->state[2] += c;
712 context->state[3] += d;
713 context->state[4] += e;
714 context->state[5] += f;
715 context->state[6] += g;
716 context->state[7] += h;
717
718 /* Clean up */
719 a = b = c = d = e = f = g = h = T1 = 0;
720}
721
722#else /* SHA2_UNROLL_TRANSFORM */
723
724static void ldns_sha512_Transform(ldns_sha512_CTX* context,
725 const sha2_word64* data) {
726 sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
727 sha2_word64 T1, T2, *W512 = (sha2_word64*)context->buffer;
728 int j;
729
730 /* initialize registers with the prev. intermediate value */
731 a = context->state[0];
732 b = context->state[1];
733 c = context->state[2];
734 d = context->state[3];
735 e = context->state[4];
736 f = context->state[5];
737 g = context->state[6];
738 h = context->state[7];
739
740 j = 0;
741 do {
742#if BYTE_ORDER == LITTLE_ENDIAN
743 /* Convert TO host byte order */
744 REVERSE64(*data++, W512[j]);
745 /* Apply the SHA-512 compression function to update a..h */
746 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];
747#else /* BYTE_ORDER == LITTLE_ENDIAN */
748 /* Apply the SHA-512 compression function to update a..h with copy */
749 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + (W512[j] = *data++);
750#endif /* BYTE_ORDER == LITTLE_ENDIAN */
751 T2 = Sigma0_512(a) + Maj(a, b, c);
752 h = g;
753 g = f;
754 f = e;
755 e = d + T1;
756 d = c;
757 c = b;
758 b = a;
759 a = T1 + T2;
760
761 j++;
762 } while (j < 16);
763
764 do {
765 /* Part of the message block expansion: */
766 s0 = W512[(j+1)&0x0f];
767 s0 = sigma0_512(s0);
768 s1 = W512[(j+14)&0x0f];
769 s1 = sigma1_512(s1);
770
771 /* Apply the SHA-512 compression function to update a..h */
772 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +
773 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0);
774 T2 = Sigma0_512(a) + Maj(a, b, c);
775 h = g;
776 g = f;
777 f = e;
778 e = d + T1;
779 d = c;
780 c = b;
781 b = a;
782 a = T1 + T2;
783
784 j++;
785 } while (j < 80);
786
787 /* Compute the current intermediate hash value */
788 context->state[0] += a;
789 context->state[1] += b;
790 context->state[2] += c;
791 context->state[3] += d;
792 context->state[4] += e;
793 context->state[5] += f;
794 context->state[6] += g;
795 context->state[7] += h;
796
797 /* Clean up */
798 a = b = c = d = e = f = g = h = T1 = T2 = 0;
799}
800
801#endif /* SHA2_UNROLL_TRANSFORM */
802
803void ldns_sha512_update(ldns_sha512_CTX* context, const sha2_byte *data, size_t len) {
fd185f4d 804 size_t freespace, usedspace;
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805
806 if (len == 0) {
807 /* Calling with no data is valid - we do nothing */
808 return;
809 }
810
811 /* Sanity check: */
812 assert(context != (ldns_sha512_CTX*)0 && data != (sha2_byte*)0);
813
814 usedspace = (context->bitcount[0] >> 3) % LDNS_SHA512_BLOCK_LENGTH;
815 if (usedspace > 0) {
816 /* Calculate how much free space is available in the buffer */
817 freespace = LDNS_SHA512_BLOCK_LENGTH - usedspace;
818
819 if (len >= freespace) {
820 /* Fill the buffer completely and process it */
821 MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace);
822 ADDINC128(context->bitcount, freespace << 3);
823 len -= freespace;
824 data += freespace;
825 ldns_sha512_Transform(context, (sha2_word64*)context->buffer);
826 } else {
827 /* The buffer is not yet full */
828 MEMCPY_BCOPY(&context->buffer[usedspace], data, len);
829 ADDINC128(context->bitcount, len << 3);
830 /* Clean up: */
831 usedspace = freespace = 0;
832 return;
833 }
834 }
835 while (len >= LDNS_SHA512_BLOCK_LENGTH) {
836 /* Process as many complete blocks as we can */
837 ldns_sha512_Transform(context, (sha2_word64*)data);
838 ADDINC128(context->bitcount, LDNS_SHA512_BLOCK_LENGTH << 3);
839 len -= LDNS_SHA512_BLOCK_LENGTH;
840 data += LDNS_SHA512_BLOCK_LENGTH;
841 }
842 if (len > 0) {
843 /* There's left-overs, so save 'em */
844 MEMCPY_BCOPY(context->buffer, data, len);
845 ADDINC128(context->bitcount, len << 3);
846 }
847 /* Clean up: */
848 usedspace = freespace = 0;
849}
850
851static void ldns_sha512_Last(ldns_sha512_CTX* context) {
fd185f4d 852 size_t usedspace;
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853
854 usedspace = (context->bitcount[0] >> 3) % LDNS_SHA512_BLOCK_LENGTH;
855#if BYTE_ORDER == LITTLE_ENDIAN
856 /* Convert FROM host byte order */
857 REVERSE64(context->bitcount[0],context->bitcount[0]);
858 REVERSE64(context->bitcount[1],context->bitcount[1]);
859#endif
860 if (usedspace > 0) {
861 /* Begin padding with a 1 bit: */
862 context->buffer[usedspace++] = 0x80;
863
864 if (usedspace <= ldns_sha512_SHORT_BLOCK_LENGTH) {
865 /* Set-up for the last transform: */
866 MEMSET_BZERO(&context->buffer[usedspace], ldns_sha512_SHORT_BLOCK_LENGTH - usedspace);
867 } else {
868 if (usedspace < LDNS_SHA512_BLOCK_LENGTH) {
869 MEMSET_BZERO(&context->buffer[usedspace], LDNS_SHA512_BLOCK_LENGTH - usedspace);
870 }
871 /* Do second-to-last transform: */
872 ldns_sha512_Transform(context, (sha2_word64*)context->buffer);
873
874 /* And set-up for the last transform: */
875 MEMSET_BZERO(context->buffer, LDNS_SHA512_BLOCK_LENGTH - 2);
876 }
877 } else {
878 /* Prepare for final transform: */
879 MEMSET_BZERO(context->buffer, ldns_sha512_SHORT_BLOCK_LENGTH);
880
881 /* Begin padding with a 1 bit: */
882 *context->buffer = 0x80;
883 }
884 /* Store the length of input data (in bits): */
885 *(sha2_word64*)&context->buffer[ldns_sha512_SHORT_BLOCK_LENGTH] = context->bitcount[1];
886 *(sha2_word64*)&context->buffer[ldns_sha512_SHORT_BLOCK_LENGTH+8] = context->bitcount[0];
887
888 /* final transform: */
889 ldns_sha512_Transform(context, (sha2_word64*)context->buffer);
890}
891
892void ldns_sha512_final(sha2_byte digest[], ldns_sha512_CTX* context) {
893 sha2_word64 *d = (sha2_word64*)digest;
894
895 /* Sanity check: */
896 assert(context != (ldns_sha512_CTX*)0);
897
898 /* If no digest buffer is passed, we don't bother doing this: */
899 if (digest != (sha2_byte*)0) {
900 ldns_sha512_Last(context);
901
902 /* Save the hash data for output: */
903#if BYTE_ORDER == LITTLE_ENDIAN
904 {
905 /* Convert TO host byte order */
906 int j;
907 for (j = 0; j < 8; j++) {
908 REVERSE64(context->state[j],context->state[j]);
909 *d++ = context->state[j];
910 }
911 }
912#else
913 MEMCPY_BCOPY(d, context->state, LDNS_SHA512_DIGEST_LENGTH);
914#endif
915 }
916
917 /* Zero out state data */
918 MEMSET_BZERO(context, sizeof(context));
919}
920
921unsigned char *
922ldns_sha512(unsigned char *data, unsigned int data_len, unsigned char *digest)
923{
924 ldns_sha512_CTX ctx;
925 ldns_sha512_init(&ctx);
926 ldns_sha512_update(&ctx, data, data_len);
927 ldns_sha512_final(digest, &ctx);
928 return digest;
929}
930
931/*** SHA-384: *********************************************************/
932void ldns_sha384_init(ldns_sha384_CTX* context) {
933 if (context == (ldns_sha384_CTX*)0) {
934 return;
935 }
936 MEMCPY_BCOPY(context->state, sha384_initial_hash_value, LDNS_SHA512_DIGEST_LENGTH);
937 MEMSET_BZERO(context->buffer, LDNS_SHA384_BLOCK_LENGTH);
938 context->bitcount[0] = context->bitcount[1] = 0;
939}
940
941void ldns_sha384_update(ldns_sha384_CTX* context, const sha2_byte* data, size_t len) {
942 ldns_sha512_update((ldns_sha512_CTX*)context, data, len);
943}
944
945void ldns_sha384_final(sha2_byte digest[], ldns_sha384_CTX* context) {
946 sha2_word64 *d = (sha2_word64*)digest;
947
948 /* Sanity check: */
949 assert(context != (ldns_sha384_CTX*)0);
950
951 /* If no digest buffer is passed, we don't bother doing this: */
952 if (digest != (sha2_byte*)0) {
953 ldns_sha512_Last((ldns_sha512_CTX*)context);
954
955 /* Save the hash data for output: */
956#if BYTE_ORDER == LITTLE_ENDIAN
957 {
958 /* Convert TO host byte order */
959 int j;
960 for (j = 0; j < 6; j++) {
961 REVERSE64(context->state[j],context->state[j]);
962 *d++ = context->state[j];
963 }
964 }
965#else
966 MEMCPY_BCOPY(d, context->state, LDNS_SHA384_DIGEST_LENGTH);
967#endif
968 }
969
970 /* Zero out state data */
971 MEMSET_BZERO(context, sizeof(context));
972}
973
974unsigned char *
975ldns_sha384(unsigned char *data, unsigned int data_len, unsigned char *digest)
976{
977 ldns_sha384_CTX ctx;
978 ldns_sha384_init(&ctx);
979 ldns_sha384_update(&ctx, data, data_len);
980 ldns_sha384_final(digest, &ctx);
981 return digest;
982}