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1.1 misho 1: /*
2: * Copyright (C) 2006 Martin Willi
3: * HSR Hochschule fuer Technik Rapperswil
4: * Copyright (C) 2001 Jari Ruusu.
5: *
6: * Ported from strongSwans implementation written by Jari Ruusu.
7: *
8: * This program is free software; you can redistribute it and/or modify it
9: * under the terms of the GNU General Public License as published by the
10: * Free Software Foundation; either version 2 of the License, or (at your
11: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
12: *
13: * This program is distributed in the hope that it will be useful, but
14: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: * for more details.
17: */
18:
19: #include <string.h>
20:
21: #include "sha2_hasher.h"
22:
23:
24: typedef struct private_sha512_hasher_t private_sha512_hasher_t;
25:
26: /**
27: * Private data structure with hashing context for SHA384 and SHA512
28: */
29: struct private_sha512_hasher_t {
30: /**
31: * Public interface for this hasher.
32: */
33: sha2_hasher_t public;
34:
35: unsigned char sha_out[128]; /* results are here, bytes 0..47/0..63 */
36: uint64_t sha_H[8];
37: uint64_t sha_blocks;
38: uint64_t sha_blocksMSB;
39: int sha_bufCnt;
40: };
41:
42:
43: typedef struct private_sha256_hasher_t private_sha256_hasher_t;
44:
45: /**
46: * Private data structure with hashing context for SHA256
47: */
48: struct private_sha256_hasher_t {
49: /**
50: * Public interface for this hasher.
51: */
52: sha2_hasher_t public;
53:
54: unsigned char sha_out[64]; /* results are here, bytes 0...31 */
55: uint32_t sha_H[8];
56: uint64_t sha_blocks;
57: int sha_bufCnt;
58: };
59:
60:
61: static const uint32_t sha224_hashInit[8] = {
62: 0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939, 0xffc00b31, 0x68581511,
63: 0x64f98fa7, 0xbefa4fa4
64: };
65:
66: static const uint32_t sha256_hashInit[8] = {
67: 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c,
68: 0x1f83d9ab, 0x5be0cd19
69: };
70:
71: static const uint32_t sha256_K[64] = {
72: 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1,
73: 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
74: 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786,
75: 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
76: 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
77: 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
78: 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b,
79: 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
80: 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
81: 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
82: 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
83: };
84:
85: static const uint64_t sha512_hashInit[8] = {
86: 0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, 0x3c6ef372fe94f82bULL,
87: 0xa54ff53a5f1d36f1ULL, 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
88: 0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL
89: };
90:
91: static const uint64_t sha384_hashInit[8] = {
92: 0xcbbb9d5dc1059ed8ULL, 0x629a292a367cd507ULL, 0x9159015a3070dd17ULL,
93: 0x152fecd8f70e5939ULL, 0x67332667ffc00b31ULL, 0x8eb44a8768581511ULL,
94: 0xdb0c2e0d64f98fa7ULL, 0x47b5481dbefa4fa4ULL
95: };
96:
97: static const uint64_t sha512_K[80] = {
98: 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL,
99: 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
100: 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL,
101: 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
102: 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL,
103: 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
104: 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL,
105: 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
106: 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL,
107: 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
108: 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL,
109: 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
110: 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL,
111: 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
112: 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL,
113: 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
114: 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL,
115: 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
116: 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL,
117: 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
118: 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL,
119: 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
120: 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL,
121: 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
122: 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL,
123: 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
124: 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
125: };
126:
127:
128: /* set macros for SHA256 */
129: #define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
130: #define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
131: #define R(x,y) ((y) >> (x))
132:
133: #define S(x,y) (((y) >> (x)) | ((y) << (32 - (x))))
134: #define uSig0(x) ((S(2,(x))) ^ (S(13,(x))) ^ (S(22,(x))))
135: #define uSig1(x) ((S(6,(x))) ^ (S(11,(x))) ^ (S(25,(x))))
136: #define lSig0(x) ((S(7,(x))) ^ (S(18,(x))) ^ (R(3,(x))))
137: #define lSig1(x) ((S(17,(x))) ^ (S(19,(x))) ^ (R(10,(x))))
138:
139: /**
140: * Single block SHA256 transformation
141: */
142: static void sha256_transform(private_sha256_hasher_t *ctx,
143: const unsigned char *datap)
144: {
145: register int j;
146: uint32_t a, b, c, d, e, f, g, h;
147: uint32_t T1, T2, W[64], Wm2, Wm15;
148:
149: /* read the data, big endian byte order */
150: j = 0;
151: do {
152: W[j] = (((uint32_t)(datap[0]))<<24) | (((uint32_t)(datap[1]))<<16) |
153: (((uint32_t)(datap[2]))<<8 ) | ((uint32_t)(datap[3]));
154: datap += 4;
155: } while(++j < 16);
156:
157: /* initialize variables a...h */
158: a = ctx->sha_H[0];
159: b = ctx->sha_H[1];
160: c = ctx->sha_H[2];
161: d = ctx->sha_H[3];
162: e = ctx->sha_H[4];
163: f = ctx->sha_H[5];
164: g = ctx->sha_H[6];
165: h = ctx->sha_H[7];
166:
167: /* apply compression function */
168: j = 0;
169: do
170: {
171: if(j >= 16)
172: {
173: Wm2 = W[j - 2];
174: Wm15 = W[j - 15];
175: W[j] = lSig1(Wm2) + W[j - 7] + lSig0(Wm15) + W[j - 16];
176: }
177: T1 = h + uSig1(e) + Ch(e,f,g) + sha256_K[j] + W[j];
178: T2 = uSig0(a) + Maj(a,b,c);
179: h = g; g = f; f = e;
180: e = d + T1;
181: d = c; c = b; b = a;
182: a = T1 + T2;
183: } while(++j < 64);
184:
185: /* compute intermediate hash value */
186: ctx->sha_H[0] += a;
187: ctx->sha_H[1] += b;
188: ctx->sha_H[2] += c;
189: ctx->sha_H[3] += d;
190: ctx->sha_H[4] += e;
191: ctx->sha_H[5] += f;
192: ctx->sha_H[6] += g;
193: ctx->sha_H[7] += h;
194:
195: ctx->sha_blocks++;
196: }
197:
198: /**
199: * Update SHA256 hash
200: */
201: static void sha256_write(private_sha256_hasher_t *ctx,
202: const unsigned char *datap, int length)
203: {
204: while(length > 0)
205: {
206: if(!ctx->sha_bufCnt)
207: {
208: while(length >= sizeof(ctx->sha_out))
209: {
210: sha256_transform(ctx, datap);
211: datap += sizeof(ctx->sha_out);
212: length -= sizeof(ctx->sha_out);
213: }
214: if(!length) return;
215: }
216: ctx->sha_out[ctx->sha_bufCnt] = *datap++;
217: length--;
218: if(++ctx->sha_bufCnt == sizeof(ctx->sha_out))
219: {
220: sha256_transform(ctx, &ctx->sha_out[0]);
221: ctx->sha_bufCnt = 0;
222: }
223: }
224: }
225:
226: /**
227: * finalize SHA256 hash
228: */
229: static void sha256_final(private_sha256_hasher_t *ctx, u_char *buf, size_t len)
230: {
231: register int j;
232: uint64_t bitLength;
233: uint32_t i;
234: unsigned char padByte, *datap;
235:
236: bitLength = (ctx->sha_blocks << 9) | (ctx->sha_bufCnt << 3);
237: padByte = 0x80;
238: sha256_write(ctx, &padByte, 1);
239:
240: /* pad extra space with zeroes */
241: padByte = 0;
242: while(ctx->sha_bufCnt != 56)
243: {
244: sha256_write(ctx, &padByte, 1);
245: }
246:
247: /* write bit length, big endian byte order */
248: ctx->sha_out[56] = bitLength >> 56;
249: ctx->sha_out[57] = bitLength >> 48;
250: ctx->sha_out[58] = bitLength >> 40;
251: ctx->sha_out[59] = bitLength >> 32;
252: ctx->sha_out[60] = bitLength >> 24;
253: ctx->sha_out[61] = bitLength >> 16;
254: ctx->sha_out[62] = bitLength >> 8;
255: ctx->sha_out[63] = bitLength;
256: sha256_transform(ctx, &ctx->sha_out[0]);
257:
258: datap = buf;
259: j = 0;
260: do {
261: i = ctx->sha_H[j];
262: datap[0] = i >> 24;
263: datap[1] = i >> 16;
264: datap[2] = i >> 8;
265: datap[3] = i;
266: datap += 4;
267: } while(++j < len / 4);
268: }
269:
270: /* update macros for SHA512 */
271: #undef S
272: #undef uSig0
273: #undef uSig1
274: #undef lSig0
275: #undef lSig1
276: #define S(x,y) (((y) >> (x)) | ((y) << (64 - (x))))
277: #define uSig0(x) ((S(28,(x))) ^ (S(34,(x))) ^ (S(39,(x))))
278: #define uSig1(x) ((S(14,(x))) ^ (S(18,(x))) ^ (S(41,(x))))
279: #define lSig0(x) ((S(1,(x))) ^ (S(8,(x))) ^ (R(7,(x))))
280: #define lSig1(x) ((S(19,(x))) ^ (S(61,(x))) ^ (R(6,(x))))
281:
282: /**
283: * Single block SHA384/SHA512 transformation
284: */
285: static void sha512_transform(private_sha512_hasher_t *ctx,
286: const unsigned char *datap)
287: {
288: register int j;
289: uint64_t a, b, c, d, e, f, g, h;
290: uint64_t T1, T2, W[80], Wm2, Wm15;
291:
292: /* read the data, big endian byte order */
293: j = 0;
294: do {
295: W[j] = (((uint64_t)(datap[0]))<<56) | (((uint64_t)(datap[1]))<<48) |
296: (((uint64_t)(datap[2]))<<40) | (((uint64_t)(datap[3]))<<32) |
297: (((uint64_t)(datap[4]))<<24) | (((uint64_t)(datap[5]))<<16) |
298: (((uint64_t)(datap[6]))<<8 ) | ((uint64_t)(datap[7]));
299: datap += 8;
300: } while(++j < 16);
301:
302: /* initialize variables a...h */
303: a = ctx->sha_H[0];
304: b = ctx->sha_H[1];
305: c = ctx->sha_H[2];
306: d = ctx->sha_H[3];
307: e = ctx->sha_H[4];
308: f = ctx->sha_H[5];
309: g = ctx->sha_H[6];
310: h = ctx->sha_H[7];
311:
312: /* apply compression function */
313: j = 0;
314: do {
315: if(j >= 16) {
316: Wm2 = W[j - 2];
317: Wm15 = W[j - 15];
318: W[j] = lSig1(Wm2) + W[j - 7] + lSig0(Wm15) + W[j - 16];
319: }
320: T1 = h + uSig1(e) + Ch(e,f,g) + sha512_K[j] + W[j];
321: T2 = uSig0(a) + Maj(a,b,c);
322: h = g; g = f; f = e;
323: e = d + T1;
324: d = c; c = b; b = a;
325: a = T1 + T2;
326: } while(++j < 80);
327:
328: /* compute intermediate hash value */
329: ctx->sha_H[0] += a;
330: ctx->sha_H[1] += b;
331: ctx->sha_H[2] += c;
332: ctx->sha_H[3] += d;
333: ctx->sha_H[4] += e;
334: ctx->sha_H[5] += f;
335: ctx->sha_H[6] += g;
336: ctx->sha_H[7] += h;
337:
338: ctx->sha_blocks++;
339: if(!ctx->sha_blocks) ctx->sha_blocksMSB++;
340: }
341:
342: /**
343: * Update a SHA384/SHA512 hash
344: */
345: static void sha512_write(private_sha512_hasher_t *ctx,
346: const unsigned char *datap, int length)
347: {
348: while(length > 0)
349: {
350: if(!ctx->sha_bufCnt)
351: {
352: while(length >= sizeof(ctx->sha_out))
353: {
354: sha512_transform(ctx, datap);
355: datap += sizeof(ctx->sha_out);
356: length -= sizeof(ctx->sha_out);
357: }
358: if(!length) return;
359: }
360: ctx->sha_out[ctx->sha_bufCnt] = *datap++;
361: length--;
362: if(++ctx->sha_bufCnt == sizeof(ctx->sha_out))
363: {
364: sha512_transform(ctx, &ctx->sha_out[0]);
365: ctx->sha_bufCnt = 0;
366: }
367: }
368: }
369:
370: /**
371: * Finalize a SHA384/SHA512 hash
372: */
373: static void sha512_final(private_sha512_hasher_t *ctx, u_char *buf, size_t len)
374: {
375: register int j;
376: uint64_t bitLength, bitLengthMSB;
377: uint64_t i;
378: unsigned char padByte, *datap;
379:
380: bitLength = (ctx->sha_blocks << 10) | (ctx->sha_bufCnt << 3);
381: bitLengthMSB = (ctx->sha_blocksMSB << 10) | (ctx->sha_blocks >> 54);
382: padByte = 0x80;
383: sha512_write(ctx, &padByte, 1);
384:
385: /* pad extra space with zeroes */
386: padByte = 0;
387: while(ctx->sha_bufCnt != 112)
388: {
389: sha512_write(ctx, &padByte, 1);
390: }
391:
392: /* write bit length, big endian byte order */
393: ctx->sha_out[112] = bitLengthMSB >> 56;
394: ctx->sha_out[113] = bitLengthMSB >> 48;
395: ctx->sha_out[114] = bitLengthMSB >> 40;
396: ctx->sha_out[115] = bitLengthMSB >> 32;
397: ctx->sha_out[116] = bitLengthMSB >> 24;
398: ctx->sha_out[117] = bitLengthMSB >> 16;
399: ctx->sha_out[118] = bitLengthMSB >> 8;
400: ctx->sha_out[119] = bitLengthMSB;
401: ctx->sha_out[120] = bitLength >> 56;
402: ctx->sha_out[121] = bitLength >> 48;
403: ctx->sha_out[122] = bitLength >> 40;
404: ctx->sha_out[123] = bitLength >> 32;
405: ctx->sha_out[124] = bitLength >> 24;
406: ctx->sha_out[125] = bitLength >> 16;
407: ctx->sha_out[126] = bitLength >> 8;
408: ctx->sha_out[127] = bitLength;
409: sha512_transform(ctx, &ctx->sha_out[0]);
410:
411: datap = buf;
412: j = 0;
413: do {
414: i = ctx->sha_H[j];
415: datap[0] = i >> 56;
416: datap[1] = i >> 48;
417: datap[2] = i >> 40;
418: datap[3] = i >> 32;
419: datap[4] = i >> 24;
420: datap[5] = i >> 16;
421: datap[6] = i >> 8;
422: datap[7] = i;
423: datap += 8;
424: } while(++j < len / 8);
425: }
426:
427: METHOD(hasher_t, reset224, bool,
428: private_sha256_hasher_t *this)
429: {
430: memcpy(&this->sha_H[0], &sha224_hashInit[0], sizeof(this->sha_H));
431: this->sha_blocks = 0;
432: this->sha_bufCnt = 0;
433: return TRUE;
434: }
435:
436: METHOD(hasher_t, reset256, bool,
437: private_sha256_hasher_t *this)
438: {
439: memcpy(&this->sha_H[0], &sha256_hashInit[0], sizeof(this->sha_H));
440: this->sha_blocks = 0;
441: this->sha_bufCnt = 0;
442: return TRUE;
443: }
444:
445: METHOD(hasher_t, reset384, bool,
446: private_sha512_hasher_t *this)
447: {
448: memcpy(&this->sha_H[0], &sha384_hashInit[0], sizeof(this->sha_H));
449: this->sha_blocks = 0;
450: this->sha_blocksMSB = 0;
451: this->sha_bufCnt = 0;
452: return TRUE;
453: }
454:
455: METHOD(hasher_t, reset512, bool,
456: private_sha512_hasher_t *this)
457: {
458: memcpy(&this->sha_H[0], &sha512_hashInit[0], sizeof(this->sha_H));
459: this->sha_blocks = 0;
460: this->sha_blocksMSB = 0;
461: this->sha_bufCnt = 0;
462: return TRUE;
463: }
464:
465: METHOD(hasher_t, get_hash224, bool,
466: private_sha256_hasher_t *this, chunk_t chunk, uint8_t *buffer)
467: {
468: sha256_write(this, chunk.ptr, chunk.len);
469: if (buffer != NULL)
470: {
471: sha256_final(this, buffer, HASH_SIZE_SHA224);
472: reset224(this);
473: }
474: return TRUE;
475: }
476:
477: METHOD(hasher_t, get_hash256, bool,
478: private_sha256_hasher_t *this, chunk_t chunk, uint8_t *buffer)
479: {
480: sha256_write(this, chunk.ptr, chunk.len);
481: if (buffer != NULL)
482: {
483: sha256_final(this, buffer, HASH_SIZE_SHA256);
484: reset256(this);
485: }
486: return TRUE;
487: }
488:
489: METHOD(hasher_t, get_hash384, bool,
490: private_sha512_hasher_t *this, chunk_t chunk, uint8_t *buffer)
491: {
492: sha512_write(this, chunk.ptr, chunk.len);
493: if (buffer != NULL)
494: {
495: sha512_final(this, buffer, HASH_SIZE_SHA384);
496: reset384(this);
497: }
498: return TRUE;
499: }
500:
501: METHOD(hasher_t, get_hash512, bool,
502: private_sha512_hasher_t *this, chunk_t chunk, uint8_t *buffer)
503: {
504: sha512_write(this, chunk.ptr, chunk.len);
505: if (buffer != NULL)
506: {
507: sha512_final(this, buffer, HASH_SIZE_SHA512);
508: reset512(this);
509: }
510: return TRUE;
511: }
512:
513: METHOD(hasher_t, allocate_hash224, bool,
514: private_sha256_hasher_t *this, chunk_t chunk, chunk_t *hash)
515: {
516: chunk_t allocated_hash = chunk_empty;
517:
518: if (hash)
519: {
520: *hash = allocated_hash = chunk_alloc(HASH_SIZE_SHA224);
521: }
522: return get_hash224(this, chunk, allocated_hash.ptr);
523: }
524:
525: METHOD(hasher_t, allocate_hash256, bool,
526: private_sha256_hasher_t *this, chunk_t chunk, chunk_t *hash)
527: {
528: chunk_t allocated_hash = chunk_empty;
529:
530: if (hash)
531: {
532: *hash = allocated_hash = chunk_alloc(HASH_SIZE_SHA256);
533: }
534: return get_hash256(this, chunk, allocated_hash.ptr);
535: }
536:
537: METHOD(hasher_t, allocate_hash384, bool,
538: private_sha512_hasher_t *this, chunk_t chunk, chunk_t *hash)
539: {
540: chunk_t allocated_hash = chunk_empty;
541:
542: if (hash)
543: {
544: *hash = allocated_hash = chunk_alloc(HASH_SIZE_SHA384);
545: }
546: return get_hash384(this, chunk, allocated_hash.ptr);
547: }
548:
549: METHOD(hasher_t, allocate_hash512, bool,
550: private_sha512_hasher_t *this, chunk_t chunk, chunk_t *hash)
551: {
552: chunk_t allocated_hash = chunk_empty;
553:
554: if (hash)
555: {
556: *hash = allocated_hash = chunk_alloc(HASH_SIZE_SHA512);
557: }
558: return get_hash512(this, chunk, allocated_hash.ptr);
559: }
560:
561: METHOD(hasher_t, get_hash_size224, size_t,
562: private_sha256_hasher_t *this)
563: {
564: return HASH_SIZE_SHA224;
565: }
566:
567: METHOD(hasher_t, get_hash_size256, size_t,
568: private_sha256_hasher_t *this)
569: {
570: return HASH_SIZE_SHA256;
571: }
572:
573: METHOD(hasher_t, get_hash_size384, size_t,
574: private_sha512_hasher_t *this)
575: {
576: return HASH_SIZE_SHA384;
577: }
578:
579: METHOD(hasher_t, get_hash_size512, size_t,
580: private_sha512_hasher_t *this)
581: {
582: return HASH_SIZE_SHA512;
583: }
584:
585: METHOD(hasher_t, destroy, void,
586: sha2_hasher_t *this)
587: {
588: free(this);
589: }
590:
591: /*
592: * Described in header.
593: */
594: sha2_hasher_t *sha2_hasher_create(hash_algorithm_t algorithm)
595: {
596: switch (algorithm)
597: {
598: case HASH_SHA224:
599: {
600: private_sha256_hasher_t *this;
601:
602: INIT(this,
603: .public = {
604: .hasher_interface = {
605: .reset = _reset224,
606: .get_hash_size = _get_hash_size224,
607: .get_hash = _get_hash224,
608: .allocate_hash = _allocate_hash224,
609: .destroy = _destroy,
610: },
611: },
612: );
613: reset224(this);
614: return &this->public;
615: }
616: case HASH_SHA256:
617: {
618: private_sha256_hasher_t *this;
619:
620: INIT(this,
621: .public = {
622: .hasher_interface = {
623: .reset = _reset256,
624: .get_hash_size = _get_hash_size256,
625: .get_hash = _get_hash256,
626: .allocate_hash = _allocate_hash256,
627: .destroy = _destroy,
628: },
629: },
630: );
631: reset256(this);
632: return &this->public;
633: }
634: case HASH_SHA384:
635: {
636: private_sha512_hasher_t *this;
637:
638: INIT(this,
639: .public = {
640: .hasher_interface = {
641: .reset = _reset384,
642: .get_hash_size = _get_hash_size384,
643: .get_hash = _get_hash384,
644: .allocate_hash = _allocate_hash384,
645: .destroy = _destroy,
646: },
647: },
648: );
649: reset384(this);
650: return &this->public;
651: }
652: case HASH_SHA512:
653: {
654: private_sha512_hasher_t *this;
655:
656: INIT(this,
657: .public = {
658: .hasher_interface = {
659: .reset = _reset512,
660: .get_hash_size = _get_hash_size512,
661: .get_hash = _get_hash512,
662: .allocate_hash = _allocate_hash512,
663: .destroy = _destroy,
664: },
665: },
666: );
667: reset512(this);
668: return &this->public;
669: }
670: default:
671: return NULL;
672: }
673: }