Annotation of parser3/src/lib/md5/pa_sha2.c, revision 1.2
1.1 moko 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: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the copyright holder nor the names of contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: */
33:
34: #include "pa_sha2.h"
35:
36: /*
37: * ASSERT NOTE:
38: * Some sanity checking code is included using assert(). On my FreeBSD
39: * system, this additional code can be removed by compiling with NDEBUG
40: * defined. Check your own systems manpage on assert() to see how to
41: * compile WITHOUT the sanity checking code on your system.
42: *
43: * UNROLLED TRANSFORM LOOP NOTE:
44: * You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform
45: * loop version for the hash transform rounds (defined using macros
46: * later in this file). Either define on the command line, for example:
47: *
48: * cc -DSHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c
49: *
50: * or define below:
51: *
52: * #define SHA2_UNROLL_TRANSFORM
53: *
54: */
55:
56:
57: /*** SHA-256/384/512 Machine Architecture Definitions *****************/
58:
59: /*
60: * Define the followingsha2_* types to types of the correct length on
61: * the native archtecture. Most BSD systems and Linux define u_intXX_t
62: * types. Machines with very recent ANSI C headers, can use the
63: * uintXX_t definintions from inttypes.h by defining SHA2_USE_INTTYPES_H
64: * during compile or in the sha.h header file.
65: *
66: * Machines that support neither u_intXX_t nor inttypes.h's uintXX_t
67: * will need to define these three typedefs below (and the appropriate
68: * ones in sha.h too) by hand according to their system architecture.
69: *
70: * Thank you, Jun-ichiro itojun Hagino, for suggesting using u_intXX_t
71: * types and pointing out recent ANSI C support for uintXX_t in inttypes.h.
72: */
73:
74: typedef uint8_t sha2_byte; /* Exactly 1 byte */
75: typedef uint32_t sha2_word32; /* Exactly 4 bytes */
76: typedef uint64_t sha2_word64; /* Exactly 8 bytes */
77:
78: /*** SHA-256/384/512 Various Length Definitions ***********************/
79: /* NOTE: Most of these are in sha2.h */
80: #define SHA256_SHORT_BLOCK_LENGTH (SHA256_BLOCK_LENGTH - 8)
81: #define SHA384_SHORT_BLOCK_LENGTH (SHA384_BLOCK_LENGTH - 16)
82: #define SHA512_SHORT_BLOCK_LENGTH (SHA512_BLOCK_LENGTH - 16)
83:
84:
85: /*** ENDIAN REVERSAL MACROS *******************************************/
1.2 ! moko 86: #ifdef PA_LITTLE_ENDIAN
1.1 moko 87: #define REVERSE32(w,x) { \
88: sha2_word32 tmp = (w); \
89: tmp = (tmp >> 16) | (tmp << 16); \
90: (x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \
91: }
92: #define REVERSE64(w,x) { \
93: sha2_word64 tmp = (w); \
94: tmp = (tmp >> 32) | (tmp << 32); \
95: tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
96: ((tmp & 0x00ff00ff00ff00ffULL) << 8); \
97: (x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \
98: ((tmp & 0x0000ffff0000ffffULL) << 16); \
99: }
1.2 ! moko 100: #endif /* PA_LITTLE_ENDIAN */
1.1 moko 101:
102: /*
103: * Macro for incrementally adding the unsigned 64-bit integer n to the
104: * unsigned 128-bit integer (represented using a two-element array of
105: * 64-bit words):
106: */
107: #define ADDINC128(w,n) { \
108: (w)[0] += (sha2_word64)(n); \
109: if ((w)[0] < (n)) { \
110: (w)[1]++; \
111: } \
112: }
113:
114: /*
115: * Macros for copying blocks of memory and for zeroing out ranges
116: * of memory. Using these macros makes it easy to switch from
117: * using memset()/memcpy() and using bzero()/bcopy().
118: *
119: * Please define either SHA2_USE_MEMSET_MEMCPY or define
120: * SHA2_USE_BZERO_BCOPY depending on which function set you
121: * choose to use:
122: */
123: #if !defined(SHA2_USE_MEMSET_MEMCPY) && !defined(SHA2_USE_BZERO_BCOPY)
124: /* Default to memset()/memcpy() if no option is specified */
125: #define SHA2_USE_MEMSET_MEMCPY 1
126: #endif
127: #if defined(SHA2_USE_MEMSET_MEMCPY) && defined(SHA2_USE_BZERO_BCOPY)
128: /* Abort with an error if BOTH options are defined */
129: #error Define either SHA2_USE_MEMSET_MEMCPY or SHA2_USE_BZERO_BCOPY, not both!
130: #endif
131:
132: #ifdef SHA2_USE_MEMSET_MEMCPY
133: #define MEMSET_BZERO(p,l) memset((p), 0, (l))
134: #define MEMCPY_BCOPY(d,s,l) memcpy((d), (s), (l))
135: #endif
136: #ifdef SHA2_USE_BZERO_BCOPY
137: #define MEMSET_BZERO(p,l) bzero((p), (l))
138: #define MEMCPY_BCOPY(d,s,l) bcopy((s), (d), (l))
139: #endif
140:
141:
142: /*** THE SIX LOGICAL FUNCTIONS ****************************************/
143: /*
144: * Bit shifting and rotation (used by the six SHA-XYZ logical functions:
145: *
146: * NOTE: The naming of R and S appears backwards here (R is a SHIFT and
147: * S is a ROTATION) because the SHA-256/384/512 description document
148: * (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this
149: * same "backwards" definition.
150: */
151: /* Shift-right (used in SHA-256, SHA-384, and SHA-512): */
152: #define R(b,x) ((x) >> (b))
153: /* 32-bit Rotate-right (used in SHA-256): */
154: #define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b))))
155: /* 64-bit Rotate-right (used in SHA-384 and SHA-512): */
156: #define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b))))
157:
158: /* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */
159: #define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
160: #define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
161:
162: /* Four of six logical functions used in SHA-256: */
163: #define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))
164: #define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))
165: #define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x)))
166: #define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))
167:
168: /* Four of six logical functions used in SHA-384 and SHA-512: */
169: #define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
170: #define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
171: #define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x)))
172: #define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x)))
173:
174: /*** INTERNAL FUNCTION PROTOTYPES *************************************/
175: /* NOTE: These should not be accessed directly from outside this
176: * library -- they are intended for private internal visibility/use
177: * only.
178: */
179: void pa_SHA512_Last(SHA512_CTX*);
180: void pa_SHA256_Transform(SHA256_CTX*, const sha2_word32*);
181: void pa_SHA512_Transform(SHA512_CTX*, const sha2_word64*);
182:
183:
184: /*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
185: /* Hash constant words K for SHA-256: */
186: const static sha2_word32 K256[64] = {
187: 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
188: 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
189: 0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
190: 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
191: 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
192: 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
193: 0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
194: 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
195: 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
196: 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
197: 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
198: 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
199: 0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
200: 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
201: 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
202: 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
203: };
204:
205: /* Initial hash value H for SHA-256: */
206: const static sha2_word32 sha256_initial_hash_value[8] = {
207: 0x6a09e667UL,
208: 0xbb67ae85UL,
209: 0x3c6ef372UL,
210: 0xa54ff53aUL,
211: 0x510e527fUL,
212: 0x9b05688cUL,
213: 0x1f83d9abUL,
214: 0x5be0cd19UL
215: };
216:
217: /* Hash constant words K for SHA-384 and SHA-512: */
218: const static sha2_word64 K512[80] = {
219: 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
220: 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
221: 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
222: 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
223: 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
224: 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
225: 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
226: 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
227: 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
228: 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
229: 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
230: 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
231: 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
232: 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
233: 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
234: 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
235: 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
236: 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
237: 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
238: 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
239: 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
240: 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
241: 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
242: 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
243: 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
244: 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
245: 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
246: 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
247: 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
248: 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
249: 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
250: 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
251: 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
252: 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
253: 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
254: 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
255: 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
256: 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
257: 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
258: 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
259: };
260:
261: /* Initial hash value H for SHA-384 */
262: const static sha2_word64 sha384_initial_hash_value[8] = {
263: 0xcbbb9d5dc1059ed8ULL,
264: 0x629a292a367cd507ULL,
265: 0x9159015a3070dd17ULL,
266: 0x152fecd8f70e5939ULL,
267: 0x67332667ffc00b31ULL,
268: 0x8eb44a8768581511ULL,
269: 0xdb0c2e0d64f98fa7ULL,
270: 0x47b5481dbefa4fa4ULL
271: };
272:
273: /* Initial hash value H for SHA-512 */
274: const static sha2_word64 sha512_initial_hash_value[8] = {
275: 0x6a09e667f3bcc908ULL,
276: 0xbb67ae8584caa73bULL,
277: 0x3c6ef372fe94f82bULL,
278: 0xa54ff53a5f1d36f1ULL,
279: 0x510e527fade682d1ULL,
280: 0x9b05688c2b3e6c1fULL,
281: 0x1f83d9abfb41bd6bULL,
282: 0x5be0cd19137e2179ULL
283: };
284:
285: /*
286: * Constant used by SHA256/384/512_End() functions for converting the
287: * digest to a readable hexadecimal character string:
288: */
289: static const char *sha2_hex_digits = "0123456789abcdef";
290:
291:
292: /*** SHA-256: *********************************************************/
293: void pa_SHA256_Init(SHA256_CTX* context) {
294: if (context == (SHA256_CTX*)0) {
295: return;
296: }
297: MEMCPY_BCOPY(context->state, sha256_initial_hash_value, SHA256_DIGEST_LENGTH);
298: MEMSET_BZERO(context->buffer, SHA256_BLOCK_LENGTH);
299: context->bitcount = 0;
300: }
301:
302: #ifdef SHA2_UNROLL_TRANSFORM
303:
304: /* Unrolled SHA-256 round macros: */
305:
1.2 ! moko 306: #ifdef PA_LITTLE_ENDIAN
1.1 moko 307:
308: #define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
309: REVERSE32(*data++, W256[j]); \
310: T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
311: K256[j] + W256[j]; \
312: (d) += T1; \
313: (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
314: j++
315:
316:
1.2 ! moko 317: #else /* PA_LITTLE_ENDIAN */
1.1 moko 318:
319: #define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
320: T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
321: K256[j] + (W256[j] = *data++); \
322: (d) += T1; \
323: (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
324: j++
325:
1.2 ! moko 326: #endif /* PA_LITTLE_ENDIAN */
1.1 moko 327:
328: #define ROUND256(a,b,c,d,e,f,g,h) \
329: s0 = W256[(j+1)&0x0f]; \
330: s0 = sigma0_256(s0); \
331: s1 = W256[(j+14)&0x0f]; \
332: s1 = sigma1_256(s1); \
333: T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[j] + \
334: (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \
335: (d) += T1; \
336: (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
337: j++
338:
339: void pa_SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
340: sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
341: sha2_word32 T1, *W256;
342: int j;
343:
344: W256 = (sha2_word32*)context->buffer;
345:
346: /* Initialize registers with the prev. intermediate value */
347: a = context->state[0];
348: b = context->state[1];
349: c = context->state[2];
350: d = context->state[3];
351: e = context->state[4];
352: f = context->state[5];
353: g = context->state[6];
354: h = context->state[7];
355:
356: j = 0;
357: do {
358: /* Rounds 0 to 15 (unrolled): */
359: ROUND256_0_TO_15(a,b,c,d,e,f,g,h);
360: ROUND256_0_TO_15(h,a,b,c,d,e,f,g);
361: ROUND256_0_TO_15(g,h,a,b,c,d,e,f);
362: ROUND256_0_TO_15(f,g,h,a,b,c,d,e);
363: ROUND256_0_TO_15(e,f,g,h,a,b,c,d);
364: ROUND256_0_TO_15(d,e,f,g,h,a,b,c);
365: ROUND256_0_TO_15(c,d,e,f,g,h,a,b);
366: ROUND256_0_TO_15(b,c,d,e,f,g,h,a);
367: } while (j < 16);
368:
369: /* Now for the remaining rounds to 64: */
370: do {
371: ROUND256(a,b,c,d,e,f,g,h);
372: ROUND256(h,a,b,c,d,e,f,g);
373: ROUND256(g,h,a,b,c,d,e,f);
374: ROUND256(f,g,h,a,b,c,d,e);
375: ROUND256(e,f,g,h,a,b,c,d);
376: ROUND256(d,e,f,g,h,a,b,c);
377: ROUND256(c,d,e,f,g,h,a,b);
378: ROUND256(b,c,d,e,f,g,h,a);
379: } while (j < 64);
380:
381: /* Compute the current intermediate hash value */
382: context->state[0] += a;
383: context->state[1] += b;
384: context->state[2] += c;
385: context->state[3] += d;
386: context->state[4] += e;
387: context->state[5] += f;
388: context->state[6] += g;
389: context->state[7] += h;
390:
391: /* Clean up */
392: a = b = c = d = e = f = g = h = T1 = 0;
393: }
394:
395: #else /* SHA2_UNROLL_TRANSFORM */
396:
397: void pa_SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
398: sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
399: sha2_word32 T1, T2, *W256;
400: int j;
401:
402: W256 = (sha2_word32*)context->buffer;
403:
404: /* Initialize registers with the prev. intermediate value */
405: a = context->state[0];
406: b = context->state[1];
407: c = context->state[2];
408: d = context->state[3];
409: e = context->state[4];
410: f = context->state[5];
411: g = context->state[6];
412: h = context->state[7];
413:
414: j = 0;
415: do {
1.2 ! moko 416: #ifdef PA_LITTLE_ENDIAN
1.1 moko 417: /* Copy data while converting to host byte order */
418: REVERSE32(*data++,W256[j]);
419: /* Apply the SHA-256 compression function to update a..h */
420: T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];
1.2 ! moko 421: #else /* PA_LITTLE_ENDIAN */
1.1 moko 422: /* Apply the SHA-256 compression function to update a..h with copy */
423: T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + (W256[j] = *data++);
1.2 ! moko 424: #endif /* PA_LITTLE_ENDIAN */
1.1 moko 425: T2 = Sigma0_256(a) + Maj(a, b, c);
426: h = g;
427: g = f;
428: f = e;
429: e = d + T1;
430: d = c;
431: c = b;
432: b = a;
433: a = T1 + T2;
434:
435: j++;
436: } while (j < 16);
437:
438: do {
439: /* Part of the message block expansion: */
440: s0 = W256[(j+1)&0x0f];
441: s0 = sigma0_256(s0);
442: s1 = W256[(j+14)&0x0f];
443: s1 = sigma1_256(s1);
444:
445: /* Apply the SHA-256 compression function to update a..h */
446: T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] +
447: (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0);
448: T2 = Sigma0_256(a) + Maj(a, b, c);
449: h = g;
450: g = f;
451: f = e;
452: e = d + T1;
453: d = c;
454: c = b;
455: b = a;
456: a = T1 + T2;
457:
458: j++;
459: } while (j < 64);
460:
461: /* Compute the current intermediate hash value */
462: context->state[0] += a;
463: context->state[1] += b;
464: context->state[2] += c;
465: context->state[3] += d;
466: context->state[4] += e;
467: context->state[5] += f;
468: context->state[6] += g;
469: context->state[7] += h;
470:
471: /* Clean up */
472: a = b = c = d = e = f = g = h = T1 = T2 = 0;
473: }
474:
475: #endif /* SHA2_UNROLL_TRANSFORM */
476:
477: void pa_SHA256_Update(SHA256_CTX* context, const sha2_byte *data, size_t len) {
478: unsigned int freespace, usedspace;
479:
480: if (len == 0) {
481: /* Calling with no data is valid - we do nothing */
482: return;
483: }
484:
485: /* Sanity check: */
486: assert(context != (SHA256_CTX*)0 && data != (sha2_byte*)0);
487:
488: usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
489: if (usedspace > 0) {
490: /* Calculate how much free space is available in the buffer */
491: freespace = SHA256_BLOCK_LENGTH - usedspace;
492:
493: if (len >= freespace) {
494: /* Fill the buffer completely and process it */
495: MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace);
496: context->bitcount += freespace << 3;
497: len -= freespace;
498: data += freespace;
499: pa_SHA256_Transform(context, (sha2_word32*)context->buffer);
500: } else {
501: /* The buffer is not yet full */
502: MEMCPY_BCOPY(&context->buffer[usedspace], data, len);
503: context->bitcount += len << 3;
504: /* Clean up: */
505: usedspace = freespace = 0;
506: return;
507: }
508: }
509: while (len >= SHA256_BLOCK_LENGTH) {
510: /* Process as many complete blocks as we can */
511: pa_SHA256_Transform(context, (sha2_word32*)data);
512: context->bitcount += SHA256_BLOCK_LENGTH << 3;
513: len -= SHA256_BLOCK_LENGTH;
514: data += SHA256_BLOCK_LENGTH;
515: }
516: if (len > 0) {
517: /* There's left-overs, so save 'em */
518: MEMCPY_BCOPY(context->buffer, data, len);
519: context->bitcount += len << 3;
520: }
521: /* Clean up: */
522: usedspace = freespace = 0;
523: }
524:
525: void pa_SHA256_Final(sha2_byte digest[], SHA256_CTX* context) {
526: sha2_word32 *d = (sha2_word32*)digest;
527: unsigned int usedspace;
528:
529: /* Sanity check: */
530: assert(context != (SHA256_CTX*)0);
531:
532: /* If no digest buffer is passed, we don't bother doing this: */
533: if (digest != (sha2_byte*)0) {
534: usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
1.2 ! moko 535: #ifdef PA_LITTLE_ENDIAN
1.1 moko 536: /* Convert FROM host byte order */
537: REVERSE64(context->bitcount,context->bitcount);
538: #endif
539: if (usedspace > 0) {
540: /* Begin padding with a 1 bit: */
541: context->buffer[usedspace++] = 0x80;
542:
543: if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) {
544: /* Set-up for the last transform: */
545: MEMSET_BZERO(&context->buffer[usedspace], SHA256_SHORT_BLOCK_LENGTH - usedspace);
546: } else {
547: if (usedspace < SHA256_BLOCK_LENGTH) {
548: MEMSET_BZERO(&context->buffer[usedspace], SHA256_BLOCK_LENGTH - usedspace);
549: }
550: /* Do second-to-last transform: */
551: pa_SHA256_Transform(context, (sha2_word32*)context->buffer);
552:
553: /* And set-up for the last transform: */
554: MEMSET_BZERO(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
555: }
556: } else {
557: /* Set-up for the last transform: */
558: MEMSET_BZERO(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
559:
560: /* Begin padding with a 1 bit: */
561: *context->buffer = 0x80;
562: }
563: /* Set the bit count: */
564: *(sha2_word64*)&context->buffer[SHA256_SHORT_BLOCK_LENGTH] = context->bitcount;
565:
566: /* Final transform: */
567: pa_SHA256_Transform(context, (sha2_word32*)context->buffer);
568:
1.2 ! moko 569: #ifdef PA_LITTLE_ENDIAN
1.1 moko 570: {
571: /* Convert TO host byte order */
572: int j;
573: for (j = 0; j < 8; j++) {
574: REVERSE32(context->state[j],context->state[j]);
575: *d++ = context->state[j];
576: }
577: }
578: #else
579: MEMCPY_BCOPY(d, context->state, SHA256_DIGEST_LENGTH);
580: #endif
581: }
582:
583: /* Clean up state data: */
584: MEMSET_BZERO(context, sizeof(SHA256_CTX));
585: usedspace = 0;
586: }
587:
588: char *pa_SHA256_End(SHA256_CTX* context, char buffer[]) {
589: sha2_byte digest[SHA256_DIGEST_LENGTH], *d = digest;
590: int i;
591:
592: /* Sanity check: */
593: assert(context != (SHA256_CTX*)0);
594:
595: if (buffer != (char*)0) {
596: pa_SHA256_Final(digest, context);
597:
598: for (i = 0; i < SHA256_DIGEST_LENGTH; i++) {
599: *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
600: *buffer++ = sha2_hex_digits[*d & 0x0f];
601: d++;
602: }
603: *buffer = (char)0;
604: } else {
605: MEMSET_BZERO(context, sizeof(SHA256_CTX));
606: }
607: MEMSET_BZERO(digest, SHA256_DIGEST_LENGTH);
608: return buffer;
609: }
610:
611: char* pa_SHA256_Data(const sha2_byte* data, size_t len, char digest[SHA256_DIGEST_STRING_LENGTH]) {
612: SHA256_CTX context;
613:
614: pa_SHA256_Init(&context);
615: pa_SHA256_Update(&context, data, len);
616: return pa_SHA256_End(&context, digest);
617: }
618:
619:
620: /*** SHA-512: *********************************************************/
621: void pa_SHA512_Init(SHA512_CTX* context) {
622: if (context == (SHA512_CTX*)0) {
623: return;
624: }
625: MEMCPY_BCOPY(context->state, sha512_initial_hash_value, SHA512_DIGEST_LENGTH);
626: MEMSET_BZERO(context->buffer, SHA512_BLOCK_LENGTH);
627: context->bitcount[0] = context->bitcount[1] = 0;
628: }
629:
630: #ifdef SHA2_UNROLL_TRANSFORM
631:
632: /* Unrolled SHA-512 round macros: */
1.2 ! moko 633: #ifdef PA_LITTLE_ENDIAN
1.1 moko 634:
635: #define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
636: REVERSE64(*data++, W512[j]); \
637: T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
638: K512[j] + W512[j]; \
639: (d) += T1, \
640: (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)), \
641: j++
642:
643:
1.2 ! moko 644: #else /* PA_LITTLE_ENDIAN */
1.1 moko 645:
646: #define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
647: T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
648: K512[j] + (W512[j] = *data++); \
649: (d) += T1; \
650: (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
651: j++
652:
1.2 ! moko 653: #endif /* PA_LITTLE_ENDIAN */
1.1 moko 654:
655: #define ROUND512(a,b,c,d,e,f,g,h) \
656: s0 = W512[(j+1)&0x0f]; \
657: s0 = sigma0_512(s0); \
658: s1 = W512[(j+14)&0x0f]; \
659: s1 = sigma1_512(s1); \
660: T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[j] + \
661: (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \
662: (d) += T1; \
663: (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
664: j++
665:
666: void pa_SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
667: sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
668: sha2_word64 T1, *W512 = (sha2_word64*)context->buffer;
669: int j;
670:
671: /* Initialize registers with the prev. intermediate value */
672: a = context->state[0];
673: b = context->state[1];
674: c = context->state[2];
675: d = context->state[3];
676: e = context->state[4];
677: f = context->state[5];
678: g = context->state[6];
679: h = context->state[7];
680:
681: j = 0;
682: do {
683: ROUND512_0_TO_15(a,b,c,d,e,f,g,h);
684: ROUND512_0_TO_15(h,a,b,c,d,e,f,g);
685: ROUND512_0_TO_15(g,h,a,b,c,d,e,f);
686: ROUND512_0_TO_15(f,g,h,a,b,c,d,e);
687: ROUND512_0_TO_15(e,f,g,h,a,b,c,d);
688: ROUND512_0_TO_15(d,e,f,g,h,a,b,c);
689: ROUND512_0_TO_15(c,d,e,f,g,h,a,b);
690: ROUND512_0_TO_15(b,c,d,e,f,g,h,a);
691: } while (j < 16);
692:
693: /* Now for the remaining rounds up to 79: */
694: do {
695: ROUND512(a,b,c,d,e,f,g,h);
696: ROUND512(h,a,b,c,d,e,f,g);
697: ROUND512(g,h,a,b,c,d,e,f);
698: ROUND512(f,g,h,a,b,c,d,e);
699: ROUND512(e,f,g,h,a,b,c,d);
700: ROUND512(d,e,f,g,h,a,b,c);
701: ROUND512(c,d,e,f,g,h,a,b);
702: ROUND512(b,c,d,e,f,g,h,a);
703: } while (j < 80);
704:
705: /* Compute the current intermediate hash value */
706: context->state[0] += a;
707: context->state[1] += b;
708: context->state[2] += c;
709: context->state[3] += d;
710: context->state[4] += e;
711: context->state[5] += f;
712: context->state[6] += g;
713: context->state[7] += h;
714:
715: /* Clean up */
716: a = b = c = d = e = f = g = h = T1 = 0;
717: }
718:
719: #else /* SHA2_UNROLL_TRANSFORM */
720:
721: void pa_SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
722: sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
723: sha2_word64 T1, T2, *W512 = (sha2_word64*)context->buffer;
724: int j;
725:
726: /* Initialize registers with the prev. intermediate value */
727: a = context->state[0];
728: b = context->state[1];
729: c = context->state[2];
730: d = context->state[3];
731: e = context->state[4];
732: f = context->state[5];
733: g = context->state[6];
734: h = context->state[7];
735:
736: j = 0;
737: do {
1.2 ! moko 738: #ifdef PA_LITTLE_ENDIAN
1.1 moko 739: /* Convert TO host byte order */
740: REVERSE64(*data++, W512[j]);
741: /* Apply the SHA-512 compression function to update a..h */
742: T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];
1.2 ! moko 743: #else /* PA_LITTLE_ENDIAN */
1.1 moko 744: /* Apply the SHA-512 compression function to update a..h with copy */
745: T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + (W512[j] = *data++);
1.2 ! moko 746: #endif /* PA_LITTLE_ENDIAN */
1.1 moko 747: T2 = Sigma0_512(a) + Maj(a, b, c);
748: h = g;
749: g = f;
750: f = e;
751: e = d + T1;
752: d = c;
753: c = b;
754: b = a;
755: a = T1 + T2;
756:
757: j++;
758: } while (j < 16);
759:
760: do {
761: /* Part of the message block expansion: */
762: s0 = W512[(j+1)&0x0f];
763: s0 = sigma0_512(s0);
764: s1 = W512[(j+14)&0x0f];
765: s1 = sigma1_512(s1);
766:
767: /* Apply the SHA-512 compression function to update a..h */
768: T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +
769: (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0);
770: T2 = Sigma0_512(a) + Maj(a, b, c);
771: h = g;
772: g = f;
773: f = e;
774: e = d + T1;
775: d = c;
776: c = b;
777: b = a;
778: a = T1 + T2;
779:
780: j++;
781: } while (j < 80);
782:
783: /* Compute the current intermediate hash value */
784: context->state[0] += a;
785: context->state[1] += b;
786: context->state[2] += c;
787: context->state[3] += d;
788: context->state[4] += e;
789: context->state[5] += f;
790: context->state[6] += g;
791: context->state[7] += h;
792:
793: /* Clean up */
794: a = b = c = d = e = f = g = h = T1 = T2 = 0;
795: }
796:
797: #endif /* SHA2_UNROLL_TRANSFORM */
798:
799: void pa_SHA512_Update(SHA512_CTX* context, const sha2_byte *data, size_t len) {
800: unsigned int freespace, usedspace;
801:
802: if (len == 0) {
803: /* Calling with no data is valid - we do nothing */
804: return;
805: }
806:
807: /* Sanity check: */
808: assert(context != (SHA512_CTX*)0 && data != (sha2_byte*)0);
809:
810: usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
811: if (usedspace > 0) {
812: /* Calculate how much free space is available in the buffer */
813: freespace = SHA512_BLOCK_LENGTH - usedspace;
814:
815: if (len >= freespace) {
816: /* Fill the buffer completely and process it */
817: MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace);
818: ADDINC128(context->bitcount, freespace << 3);
819: len -= freespace;
820: data += freespace;
821: pa_SHA512_Transform(context, (sha2_word64*)context->buffer);
822: } else {
823: /* The buffer is not yet full */
824: MEMCPY_BCOPY(&context->buffer[usedspace], data, len);
825: ADDINC128(context->bitcount, len << 3);
826: /* Clean up: */
827: usedspace = freespace = 0;
828: return;
829: }
830: }
831: while (len >= SHA512_BLOCK_LENGTH) {
832: /* Process as many complete blocks as we can */
833: pa_SHA512_Transform(context, (sha2_word64*)data);
834: ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
835: len -= SHA512_BLOCK_LENGTH;
836: data += SHA512_BLOCK_LENGTH;
837: }
838: if (len > 0) {
839: /* There's left-overs, so save 'em */
840: MEMCPY_BCOPY(context->buffer, data, len);
841: ADDINC128(context->bitcount, len << 3);
842: }
843: /* Clean up: */
844: usedspace = freespace = 0;
845: }
846:
847: void pa_SHA512_Last(SHA512_CTX* context) {
848: unsigned int usedspace;
849:
850: usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
1.2 ! moko 851: #ifdef PA_LITTLE_ENDIAN
1.1 moko 852: /* Convert FROM host byte order */
853: REVERSE64(context->bitcount[0],context->bitcount[0]);
854: REVERSE64(context->bitcount[1],context->bitcount[1]);
855: #endif
856: if (usedspace > 0) {
857: /* Begin padding with a 1 bit: */
858: context->buffer[usedspace++] = 0x80;
859:
860: if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) {
861: /* Set-up for the last transform: */
862: MEMSET_BZERO(&context->buffer[usedspace], SHA512_SHORT_BLOCK_LENGTH - usedspace);
863: } else {
864: if (usedspace < SHA512_BLOCK_LENGTH) {
865: MEMSET_BZERO(&context->buffer[usedspace], SHA512_BLOCK_LENGTH - usedspace);
866: }
867: /* Do second-to-last transform: */
868: pa_SHA512_Transform(context, (sha2_word64*)context->buffer);
869:
870: /* And set-up for the last transform: */
871: MEMSET_BZERO(context->buffer, SHA512_BLOCK_LENGTH - 2);
872: }
873: } else {
874: /* Prepare for final transform: */
875: MEMSET_BZERO(context->buffer, SHA512_SHORT_BLOCK_LENGTH);
876:
877: /* Begin padding with a 1 bit: */
878: *context->buffer = 0x80;
879: }
880: /* Store the length of input data (in bits): */
881: *(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH] = context->bitcount[1];
882: *(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH+8] = context->bitcount[0];
883:
884: /* Final transform: */
885: pa_SHA512_Transform(context, (sha2_word64*)context->buffer);
886: }
887:
888: void pa_SHA512_Final(sha2_byte digest[], SHA512_CTX* context) {
889: sha2_word64 *d = (sha2_word64*)digest;
890:
891: /* Sanity check: */
892: assert(context != (SHA512_CTX*)0);
893:
894: /* If no digest buffer is passed, we don't bother doing this: */
895: if (digest != (sha2_byte*)0) {
896: pa_SHA512_Last(context);
897:
898: /* Save the hash data for output: */
1.2 ! moko 899: #ifdef PA_LITTLE_ENDIAN
1.1 moko 900: {
901: /* Convert TO host byte order */
902: int j;
903: for (j = 0; j < 8; j++) {
904: REVERSE64(context->state[j],context->state[j]);
905: *d++ = context->state[j];
906: }
907: }
908: #else
909: MEMCPY_BCOPY(d, context->state, SHA512_DIGEST_LENGTH);
910: #endif
911: }
912:
913: /* Zero out state data */
914: MEMSET_BZERO(context, sizeof(SHA512_CTX));
915: }
916:
917: char *pa_SHA512_End(SHA512_CTX* context, char buffer[]) {
918: sha2_byte digest[SHA512_DIGEST_LENGTH], *d = digest;
919: int i;
920:
921: /* Sanity check: */
922: assert(context != (SHA512_CTX*)0);
923:
924: if (buffer != (char*)0) {
925: pa_SHA512_Final(digest, context);
926:
927: for (i = 0; i < SHA512_DIGEST_LENGTH; i++) {
928: *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
929: *buffer++ = sha2_hex_digits[*d & 0x0f];
930: d++;
931: }
932: *buffer = (char)0;
933: } else {
934: MEMSET_BZERO(context, sizeof(SHA512_CTX));
935: }
936: MEMSET_BZERO(digest, SHA512_DIGEST_LENGTH);
937: return buffer;
938: }
939:
940: char* pa_SHA512_Data(const sha2_byte* data, size_t len, char digest[SHA512_DIGEST_STRING_LENGTH]) {
941: SHA512_CTX context;
942:
943: pa_SHA512_Init(&context);
944: pa_SHA512_Update(&context, data, len);
945: return pa_SHA512_End(&context, digest);
946: }
947:
948:
949: /*** SHA-384: *********************************************************/
950: void pa_SHA384_Init(SHA384_CTX* context) {
951: if (context == (SHA384_CTX*)0) {
952: return;
953: }
954: MEMCPY_BCOPY(context->state, sha384_initial_hash_value, SHA512_DIGEST_LENGTH);
955: MEMSET_BZERO(context->buffer, SHA384_BLOCK_LENGTH);
956: context->bitcount[0] = context->bitcount[1] = 0;
957: }
958:
959: void pa_SHA384_Update(SHA384_CTX* context, const sha2_byte* data, size_t len) {
960: pa_SHA512_Update((SHA512_CTX*)context, data, len);
961: }
962:
963: void pa_SHA384_Final(sha2_byte digest[], SHA384_CTX* context) {
964: sha2_word64 *d = (sha2_word64*)digest;
965:
966: /* Sanity check: */
967: assert(context != (SHA384_CTX*)0);
968:
969: /* If no digest buffer is passed, we don't bother doing this: */
970: if (digest != (sha2_byte*)0) {
971: pa_SHA512_Last((SHA512_CTX*)context);
972:
973: /* Save the hash data for output: */
1.2 ! moko 974: #ifdef PA_LITTLE_ENDIAN
1.1 moko 975: {
976: /* Convert TO host byte order */
977: int j;
978: for (j = 0; j < 6; j++) {
979: REVERSE64(context->state[j],context->state[j]);
980: *d++ = context->state[j];
981: }
982: }
983: #else
984: MEMCPY_BCOPY(d, context->state, SHA384_DIGEST_LENGTH);
985: #endif
986: }
987:
988: /* Zero out state data */
989: MEMSET_BZERO(context, sizeof(SHA384_CTX));
990: }
991:
992: char *pa_SHA384_End(SHA384_CTX* context, char buffer[]) {
993: sha2_byte digest[SHA384_DIGEST_LENGTH], *d = digest;
994: int i;
995:
996: /* Sanity check: */
997: assert(context != (SHA384_CTX*)0);
998:
999: if (buffer != (char*)0) {
1000: pa_SHA384_Final(digest, context);
1001:
1002: for (i = 0; i < SHA384_DIGEST_LENGTH; i++) {
1003: *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
1004: *buffer++ = sha2_hex_digits[*d & 0x0f];
1005: d++;
1006: }
1007: *buffer = (char)0;
1008: } else {
1009: MEMSET_BZERO(context, sizeof(SHA384_CTX));
1010: }
1011: MEMSET_BZERO(digest, SHA384_DIGEST_LENGTH);
1012: return buffer;
1013: }
1014:
1015: char* pa_SHA384_Data(const sha2_byte* data, size_t len, char digest[SHA384_DIGEST_STRING_LENGTH]) {
1016: SHA384_CTX context;
1017:
1018: pa_SHA384_Init(&context);
1019: pa_SHA384_Update(&context, data, len);
1020: return pa_SHA384_End(&context, digest);
1021: }
1022:
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to pa_sha2.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / lib / md5