1: /*
2: * BIRD Library -- SHA-512 and SHA-384 Hash Functions
3: *
4: * (c) 2015 CZ.NIC z.s.p.o.
5: *
6: * Based on the code from libgcrypt-1.6.0, which is
7: * (c) 2003, 2006, 2008, 2009 Free Software Foundation, Inc.
8: *
9: * Can be freely distributed and used under the terms of the GNU GPL.
10: */
11:
12: #include "lib/sha512.h"
13: #include "lib/unaligned.h"
14:
15:
16: // #define SHA512_UNROLLED
17:
18: void
19: sha512_init(struct hash_context *CTX)
20: {
21: struct sha512_context *ctx = (void *) CTX;
22:
23: ctx->h0 = U64(0x6a09e667f3bcc908);
24: ctx->h1 = U64(0xbb67ae8584caa73b);
25: ctx->h2 = U64(0x3c6ef372fe94f82b);
26: ctx->h3 = U64(0xa54ff53a5f1d36f1);
27: ctx->h4 = U64(0x510e527fade682d1);
28: ctx->h5 = U64(0x9b05688c2b3e6c1f);
29: ctx->h6 = U64(0x1f83d9abfb41bd6b);
30: ctx->h7 = U64(0x5be0cd19137e2179);
31:
32: ctx->nblocks = 0;
33: ctx->count = 0;
34: }
35:
36: void
37: sha384_init(struct hash_context *CTX)
38: {
39: struct sha384_context *ctx = (void *) CTX;
40:
41: ctx->h0 = U64(0xcbbb9d5dc1059ed8);
42: ctx->h1 = U64(0x629a292a367cd507);
43: ctx->h2 = U64(0x9159015a3070dd17);
44: ctx->h3 = U64(0x152fecd8f70e5939);
45: ctx->h4 = U64(0x67332667ffc00b31);
46: ctx->h5 = U64(0x8eb44a8768581511);
47: ctx->h6 = U64(0xdb0c2e0d64f98fa7);
48: ctx->h7 = U64(0x47b5481dbefa4fa4);
49:
50: ctx->nblocks = 0;
51: ctx->count = 0;
52: }
53:
54: static inline u64
55: ROTR(u64 x, u64 n)
56: {
57: return ((x >> n) | (x << (64 - n)));
58: }
59:
60: static inline u64
61: Ch(u64 x, u64 y, u64 z)
62: {
63: return ((x & y) ^ ( ~x & z));
64: }
65:
66: static inline u64
67: Maj(u64 x, u64 y, u64 z)
68: {
69: return ((x & y) ^ (x & z) ^ (y & z));
70: }
71:
72: static inline u64
73: sum0(u64 x)
74: {
75: return (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39));
76: }
77:
78: static inline u64
79: sum1(u64 x)
80: {
81: return (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41));
82: }
83:
84: static const u64 k[] =
85: {
86: U64(0x428a2f98d728ae22), U64(0x7137449123ef65cd),
87: U64(0xb5c0fbcfec4d3b2f), U64(0xe9b5dba58189dbbc),
88: U64(0x3956c25bf348b538), U64(0x59f111f1b605d019),
89: U64(0x923f82a4af194f9b), U64(0xab1c5ed5da6d8118),
90: U64(0xd807aa98a3030242), U64(0x12835b0145706fbe),
91: U64(0x243185be4ee4b28c), U64(0x550c7dc3d5ffb4e2),
92: U64(0x72be5d74f27b896f), U64(0x80deb1fe3b1696b1),
93: U64(0x9bdc06a725c71235), U64(0xc19bf174cf692694),
94: U64(0xe49b69c19ef14ad2), U64(0xefbe4786384f25e3),
95: U64(0x0fc19dc68b8cd5b5), U64(0x240ca1cc77ac9c65),
96: U64(0x2de92c6f592b0275), U64(0x4a7484aa6ea6e483),
97: U64(0x5cb0a9dcbd41fbd4), U64(0x76f988da831153b5),
98: U64(0x983e5152ee66dfab), U64(0xa831c66d2db43210),
99: U64(0xb00327c898fb213f), U64(0xbf597fc7beef0ee4),
100: U64(0xc6e00bf33da88fc2), U64(0xd5a79147930aa725),
101: U64(0x06ca6351e003826f), U64(0x142929670a0e6e70),
102: U64(0x27b70a8546d22ffc), U64(0x2e1b21385c26c926),
103: U64(0x4d2c6dfc5ac42aed), U64(0x53380d139d95b3df),
104: U64(0x650a73548baf63de), U64(0x766a0abb3c77b2a8),
105: U64(0x81c2c92e47edaee6), U64(0x92722c851482353b),
106: U64(0xa2bfe8a14cf10364), U64(0xa81a664bbc423001),
107: U64(0xc24b8b70d0f89791), U64(0xc76c51a30654be30),
108: U64(0xd192e819d6ef5218), U64(0xd69906245565a910),
109: U64(0xf40e35855771202a), U64(0x106aa07032bbd1b8),
110: U64(0x19a4c116b8d2d0c8), U64(0x1e376c085141ab53),
111: U64(0x2748774cdf8eeb99), U64(0x34b0bcb5e19b48a8),
112: U64(0x391c0cb3c5c95a63), U64(0x4ed8aa4ae3418acb),
113: U64(0x5b9cca4f7763e373), U64(0x682e6ff3d6b2b8a3),
114: U64(0x748f82ee5defb2fc), U64(0x78a5636f43172f60),
115: U64(0x84c87814a1f0ab72), U64(0x8cc702081a6439ec),
116: U64(0x90befffa23631e28), U64(0xa4506cebde82bde9),
117: U64(0xbef9a3f7b2c67915), U64(0xc67178f2e372532b),
118: U64(0xca273eceea26619c), U64(0xd186b8c721c0c207),
119: U64(0xeada7dd6cde0eb1e), U64(0xf57d4f7fee6ed178),
120: U64(0x06f067aa72176fba), U64(0x0a637dc5a2c898a6),
121: U64(0x113f9804bef90dae), U64(0x1b710b35131c471b),
122: U64(0x28db77f523047d84), U64(0x32caab7b40c72493),
123: U64(0x3c9ebe0a15c9bebc), U64(0x431d67c49c100d4c),
124: U64(0x4cc5d4becb3e42b6), U64(0x597f299cfc657e2a),
125: U64(0x5fcb6fab3ad6faec), U64(0x6c44198c4a475817)
126: };
127:
128: /*
129: * Transform the message W which consists of 16 64-bit-words
130: */
131: static uint
132: sha512_transform(struct sha512_context *ctx, const byte *data)
133: {
134: u64 a, b, c, d, e, f, g, h;
135: u64 w[16];
136: uint t;
137:
138: /* get values from the chaining vars */
139: a = ctx->h0;
140: b = ctx->h1;
141: c = ctx->h2;
142: d = ctx->h3;
143: e = ctx->h4;
144: f = ctx->h5;
145: g = ctx->h6;
146: h = ctx->h7;
147:
148: for (t = 0; t < 16; t++)
149: w[t] = get_u64(data + t * 8);
150:
151: #define S0(x) (ROTR((x),1) ^ ROTR((x),8) ^ ((x)>>7))
152: #define S1(x) (ROTR((x),19) ^ ROTR((x),61) ^ ((x)>>6))
153:
154: for (t = 0; t < 80 - 16; )
155: {
156: u64 t1, t2;
157:
158: /* Performance on a AMD Athlon(tm) Dual Core Processor 4050e
159: with gcc 4.3.3 using gcry_md_hash_buffer of each 10000 bytes
160: initialized to 0,1,2,3...255,0,... and 1000 iterations:
161:
162: Not unrolled with macros: 440ms
163: Unrolled with macros: 350ms
164: Unrolled with inline: 330ms
165: */
166: #ifndef SHA512_UNROLLED
167: t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[t%16];
168: w[t%16] += S1(w[(t - 2)%16]) + w[(t - 7)%16] + S0(w[(t - 15)%16]);
169: t2 = sum0(a) + Maj(a, b, c);
170: h = g;
171: g = f;
172: f = e;
173: e = d + t1;
174: d = c;
175: c = b;
176: b = a;
177: a = t1 + t2;
178: t++;
179: #else /* Unrolled */
180: t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[0];
181: w[0] += S1(w[14]) + w[9] + S0(w[1]);
182: t2 = sum0(a) + Maj(a, b, c);
183: d += t1;
184: h = t1 + t2;
185:
186: t1 = g + sum1(d) + Ch(d, e, f) + k[t+1] + w[1];
187: w[1] += S1(w[15]) + w[10] + S0(w[2]);
188: t2 = sum0(h) + Maj(h, a, b);
189: c += t1;
190: g = t1 + t2;
191:
192: t1 = f + sum1(c) + Ch(c, d, e) + k[t+2] + w[2];
193: w[2] += S1(w[0]) + w[11] + S0(w[3]);
194: t2 = sum0(g) + Maj(g, h, a);
195: b += t1;
196: f = t1 + t2;
197:
198: t1 = e + sum1(b) + Ch(b, c, d) + k[t+3] + w[3];
199: w[3] += S1(w[1]) + w[12] + S0(w[4]);
200: t2 = sum0(f) + Maj(f, g, h);
201: a += t1;
202: e = t1 + t2;
203:
204: t1 = d + sum1(a) + Ch(a, b, c) + k[t+4] + w[4];
205: w[4] += S1(w[2]) + w[13] + S0(w[5]);
206: t2 = sum0(e) + Maj(e, f, g);
207: h += t1;
208: d = t1 + t2;
209:
210: t1 = c + sum1(h) + Ch(h, a, b) + k[t+5] + w[5];
211: w[5] += S1(w[3]) + w[14] + S0(w[6]);
212: t2 = sum0(d) + Maj(d, e, f);
213: g += t1;
214: c = t1 + t2;
215:
216: t1 = b + sum1(g) + Ch(g, h, a) + k[t+6] + w[6];
217: w[6] += S1(w[4]) + w[15] + S0(w[7]);
218: t2 = sum0(c) + Maj(c, d, e);
219: f += t1;
220: b = t1 + t2;
221:
222: t1 = a + sum1(f) + Ch(f, g, h) + k[t+7] + w[7];
223: w[7] += S1(w[5]) + w[0] + S0(w[8]);
224: t2 = sum0(b) + Maj(b, c, d);
225: e += t1;
226: a = t1 + t2;
227:
228: t1 = h + sum1(e) + Ch(e, f, g) + k[t+8] + w[8];
229: w[8] += S1(w[6]) + w[1] + S0(w[9]);
230: t2 = sum0(a) + Maj(a, b, c);
231: d += t1;
232: h = t1 + t2;
233:
234: t1 = g + sum1(d) + Ch(d, e, f) + k[t+9] + w[9];
235: w[9] += S1(w[7]) + w[2] + S0(w[10]);
236: t2 = sum0(h) + Maj(h, a, b);
237: c += t1;
238: g = t1 + t2;
239:
240: t1 = f + sum1(c) + Ch(c, d, e) + k[t+10] + w[10];
241: w[10] += S1(w[8]) + w[3] + S0(w[11]);
242: t2 = sum0(g) + Maj(g, h, a);
243: b += t1;
244: f = t1 + t2;
245:
246: t1 = e + sum1(b) + Ch(b, c, d) + k[t+11] + w[11];
247: w[11] += S1(w[9]) + w[4] + S0(w[12]);
248: t2 = sum0(f) + Maj(f, g, h);
249: a += t1;
250: e = t1 + t2;
251:
252: t1 = d + sum1(a) + Ch(a, b, c) + k[t+12] + w[12];
253: w[12] += S1(w[10]) + w[5] + S0(w[13]);
254: t2 = sum0(e) + Maj(e, f, g);
255: h += t1;
256: d = t1 + t2;
257:
258: t1 = c + sum1(h) + Ch(h, a, b) + k[t+13] + w[13];
259: w[13] += S1(w[11]) + w[6] + S0(w[14]);
260: t2 = sum0(d) + Maj(d, e, f);
261: g += t1;
262: c = t1 + t2;
263:
264: t1 = b + sum1(g) + Ch(g, h, a) + k[t+14] + w[14];
265: w[14] += S1(w[12]) + w[7] + S0(w[15]);
266: t2 = sum0(c) + Maj(c, d, e);
267: f += t1;
268: b = t1 + t2;
269:
270: t1 = a + sum1(f) + Ch(f, g, h) + k[t+15] + w[15];
271: w[15] += S1(w[13]) + w[8] + S0(w[0]);
272: t2 = sum0(b) + Maj(b, c, d);
273: e += t1;
274: a = t1 + t2;
275:
276: t += 16;
277: #endif
278: }
279:
280: for (; t < 80; )
281: {
282: u64 t1, t2;
283:
284: #ifndef SHA512_UNROLLED
285: t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[t%16];
286: t2 = sum0(a) + Maj(a, b, c);
287: h = g;
288: g = f;
289: f = e;
290: e = d + t1;
291: d = c;
292: c = b;
293: b = a;
294: a = t1 + t2;
295: t++;
296: #else /* Unrolled */
297: t1 = h + sum1(e) + Ch(e, f, g) + k[t] + w[0];
298: t2 = sum0(a) + Maj(a, b, c);
299: d += t1;
300: h = t1 + t2;
301:
302: t1 = g + sum1(d) + Ch(d, e, f) + k[t+1] + w[1];
303: t2 = sum0(h) + Maj(h, a, b);
304: c += t1;
305: g = t1 + t2;
306:
307: t1 = f + sum1(c) + Ch(c, d, e) + k[t+2] + w[2];
308: t2 = sum0(g) + Maj(g, h, a);
309: b += t1;
310: f = t1 + t2;
311:
312: t1 = e + sum1(b) + Ch(b, c, d) + k[t+3] + w[3];
313: t2 = sum0(f) + Maj(f, g, h);
314: a += t1;
315: e = t1 + t2;
316:
317: t1 = d + sum1(a) + Ch(a, b, c) + k[t+4] + w[4];
318: t2 = sum0(e) + Maj(e, f, g);
319: h += t1;
320: d = t1 + t2;
321:
322: t1 = c + sum1(h) + Ch(h, a, b) + k[t+5] + w[5];
323: t2 = sum0(d) + Maj(d, e, f);
324: g += t1;
325: c = t1 + t2;
326:
327: t1 = b + sum1(g) + Ch(g, h, a) + k[t+6] + w[6];
328: t2 = sum0(c) + Maj(c, d, e);
329: f += t1;
330: b = t1 + t2;
331:
332: t1 = a + sum1(f) + Ch(f, g, h) + k[t+7] + w[7];
333: t2 = sum0(b) + Maj(b, c, d);
334: e += t1;
335: a = t1 + t2;
336:
337: t1 = h + sum1(e) + Ch(e, f, g) + k[t+8] + w[8];
338: t2 = sum0(a) + Maj(a, b, c);
339: d += t1;
340: h = t1 + t2;
341:
342: t1 = g + sum1(d) + Ch(d, e, f) + k[t+9] + w[9];
343: t2 = sum0(h) + Maj(h, a, b);
344: c += t1;
345: g = t1 + t2;
346:
347: t1 = f + sum1(c) + Ch(c, d, e) + k[t+10] + w[10];
348: t2 = sum0(g) + Maj(g, h, a);
349: b += t1;
350: f = t1 + t2;
351:
352: t1 = e + sum1(b) + Ch(b, c, d) + k[t+11] + w[11];
353: t2 = sum0(f) + Maj(f, g, h);
354: a += t1;
355: e = t1 + t2;
356:
357: t1 = d + sum1(a) + Ch(a, b, c) + k[t+12] + w[12];
358: t2 = sum0(e) + Maj(e, f, g);
359: h += t1;
360: d = t1 + t2;
361:
362: t1 = c + sum1(h) + Ch(h, a, b) + k[t+13] + w[13];
363: t2 = sum0(d) + Maj(d, e, f);
364: g += t1;
365: c = t1 + t2;
366:
367: t1 = b + sum1(g) + Ch(g, h, a) + k[t+14] + w[14];
368: t2 = sum0(c) + Maj(c, d, e);
369: f += t1;
370: b = t1 + t2;
371:
372: t1 = a + sum1(f) + Ch(f, g, h) + k[t+15] + w[15];
373: t2 = sum0(b) + Maj(b, c, d);
374: e += t1;
375: a = t1 + t2;
376:
377: t += 16;
378: #endif
379: }
380:
381: /* Update chaining vars. */
382: ctx->h0 += a;
383: ctx->h1 += b;
384: ctx->h2 += c;
385: ctx->h3 += d;
386: ctx->h4 += e;
387: ctx->h5 += f;
388: ctx->h6 += g;
389: ctx->h7 += h;
390:
391: return /* burn_stack */ (8 + 16) * sizeof(u64) + sizeof(u32) + 3 * sizeof(void*);
392: }
393:
394: void
395: sha512_update(struct hash_context *CTX, const byte *buf, uint len)
396: {
397: struct sha512_context *ctx = (void *) CTX;
398:
399: if (ctx->count)
400: {
401: /* Fill rest of internal buffer */
402: for (; len && ctx->count < SHA512_BLOCK_SIZE; len--)
403: ctx->buf[ctx->count++] = *buf++;
404:
405: if (ctx->count < SHA512_BLOCK_SIZE)
406: return;
407:
408: /* Process data from internal buffer */
409: sha512_transform(ctx, ctx->buf);
410: ctx->nblocks++;
411: ctx->count = 0;
412: }
413:
414: if (!len)
415: return;
416:
417: /* Process data from input buffer */
418: while (len >= SHA512_BLOCK_SIZE)
419: {
420: sha512_transform(ctx, buf);
421: ctx->nblocks++;
422: buf += SHA512_BLOCK_SIZE;
423: len -= SHA512_BLOCK_SIZE;
424: }
425:
426: /* Copy remaining data to internal buffer */
427: memcpy(ctx->buf, buf, len);
428: ctx->count = len;
429: }
430:
431: /*
432: * The routine final terminates the computation and returns the digest. The
433: * handle is prepared for a new cycle, but adding bytes to the handle will the
434: * destroy the returned buffer.
435: *
436: * Returns: 64 bytes representing the digest. When used for sha384, we take the
437: * first 48 of those bytes.
438: */
439: byte *
440: sha512_final(struct hash_context *CTX)
441: {
442: struct sha512_context *ctx = (void *) CTX;
443: u64 t, th, msb, lsb;
444:
445: sha512_update(CTX, NULL, 0); /* flush */
446:
447: t = ctx->nblocks;
448: th = 0;
449:
450: /* multiply by 128 to make a byte count */
451: lsb = t << 7;
452: msb = (th << 7) | (t >> 57);
453: /* add the count */
454: t = lsb;
455: if ((lsb += ctx->count) < t)
456: msb++;
457: /* multiply by 8 to make a bit count */
458: t = lsb;
459: lsb <<= 3;
460: msb <<= 3;
461: msb |= t >> 61;
462:
463: if (ctx->count < 112)
464: {
465: /* enough room */
466: ctx->buf[ctx->count++] = 0x80; /* pad */
467: while(ctx->count < 112)
468: ctx->buf[ctx->count++] = 0; /* pad */
469: }
470: else
471: {
472: /* need one extra block */
473: ctx->buf[ctx->count++] = 0x80; /* pad character */
474: while(ctx->count < 128)
475: ctx->buf[ctx->count++] = 0;
476: sha512_update(CTX, NULL, 0); /* flush */
477: memset(ctx->buf, 0, 112); /* fill next block with zeroes */
478: }
479:
480: /* append the 128 bit count */
481: put_u64(ctx->buf + 112, msb);
482: put_u64(ctx->buf + 120, lsb);
483: sha512_transform(ctx, ctx->buf);
484:
485: byte *p = ctx->buf;
486: #define X(a) do { put_u64(p, ctx->h##a); p += 8; } while(0)
487: X(0);
488: X(1);
489: X(2);
490: X(3);
491: X(4);
492: X(5);
493: X(6);
494: X(7);
495: #undef X
496:
497: return ctx->buf;
498: }
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