mirror of
https://github.com/waku-org/nwaku.git
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342 lines
9.2 KiB
C
342 lines
9.2 KiB
C
/*
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* Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "inner.h"
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#define CH(X, Y, Z) ((((Y) ^ (Z)) & (X)) ^ (Z))
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#define MAJ(X, Y, Z) (((Y) & (Z)) | (((Y) | (Z)) & (X)))
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#define ROTR(x, n) (((uint32_t)(x) << (32 - (n))) | ((uint32_t)(x) >> (n)))
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#define BSG2_0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
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#define BSG2_1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
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#define SSG2_0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ (uint32_t)((x) >> 3))
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#define SSG2_1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ (uint32_t)((x) >> 10))
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/* see inner.h */
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const uint32_t br_sha224_IV[8] = {
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0xC1059ED8, 0x367CD507, 0x3070DD17, 0xF70E5939,
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0xFFC00B31, 0x68581511, 0x64F98FA7, 0xBEFA4FA4
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};
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/* see inner.h */
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const uint32_t br_sha256_IV[8] = {
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0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A,
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0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19
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};
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static const uint32_t K[64] = {
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0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
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0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
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0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
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0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
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0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
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0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
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0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
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0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
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0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
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0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
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0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
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0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
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0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
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0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
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0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
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0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2
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};
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/* see inner.h */
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void
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br_sha2small_round(const unsigned char *buf, uint32_t *val)
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{
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#define SHA2_STEP(A, B, C, D, E, F, G, H, j) do { \
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uint32_t T1, T2; \
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T1 = H + BSG2_1(E) + CH(E, F, G) + K[j] + w[j]; \
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T2 = BSG2_0(A) + MAJ(A, B, C); \
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D += T1; \
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H = T1 + T2; \
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} while (0)
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int i;
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uint32_t a, b, c, d, e, f, g, h;
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uint32_t w[64];
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br_range_dec32be(w, 16, buf);
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for (i = 16; i < 64; i ++) {
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w[i] = SSG2_1(w[i - 2]) + w[i - 7]
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+ SSG2_0(w[i - 15]) + w[i - 16];
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}
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a = val[0];
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b = val[1];
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c = val[2];
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d = val[3];
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e = val[4];
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f = val[5];
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g = val[6];
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h = val[7];
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for (i = 0; i < 64; i += 8) {
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SHA2_STEP(a, b, c, d, e, f, g, h, i + 0);
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SHA2_STEP(h, a, b, c, d, e, f, g, i + 1);
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SHA2_STEP(g, h, a, b, c, d, e, f, i + 2);
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SHA2_STEP(f, g, h, a, b, c, d, e, i + 3);
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SHA2_STEP(e, f, g, h, a, b, c, d, i + 4);
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SHA2_STEP(d, e, f, g, h, a, b, c, i + 5);
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SHA2_STEP(c, d, e, f, g, h, a, b, i + 6);
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SHA2_STEP(b, c, d, e, f, g, h, a, i + 7);
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}
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val[0] += a;
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val[1] += b;
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val[2] += c;
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val[3] += d;
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val[4] += e;
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val[5] += f;
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val[6] += g;
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val[7] += h;
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#if 0
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/* obsolete */
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#define SHA2_MEXP1(pc) do { \
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W[pc] = br_dec32be(buf + ((pc) << 2)); \
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} while (0)
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#define SHA2_MEXP2(pc) do { \
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W[(pc) & 0x0F] = SSG2_1(W[((pc) - 2) & 0x0F]) \
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+ W[((pc) - 7) & 0x0F] \
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+ SSG2_0(W[((pc) - 15) & 0x0F]) + W[(pc) & 0x0F]; \
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} while (0)
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#define SHA2_STEPn(n, a, b, c, d, e, f, g, h, pc) do { \
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uint32_t t1, t2; \
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SHA2_MEXP ## n(pc); \
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t1 = h + BSG2_1(e) + CH(e, f, g) \
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+ K[pcount + (pc)] + W[(pc) & 0x0F]; \
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t2 = BSG2_0(a) + MAJ(a, b, c); \
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d += t1; \
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h = t1 + t2; \
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} while (0)
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#define SHA2_STEP1(a, b, c, d, e, f, g, h, pc) \
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SHA2_STEPn(1, a, b, c, d, e, f, g, h, pc)
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#define SHA2_STEP2(a, b, c, d, e, f, g, h, pc) \
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SHA2_STEPn(2, a, b, c, d, e, f, g, h, pc)
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uint32_t A, B, C, D, E, F, G, H;
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uint32_t W[16];
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unsigned pcount;
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A = val[0];
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B = val[1];
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C = val[2];
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D = val[3];
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E = val[4];
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F = val[5];
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G = val[6];
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H = val[7];
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pcount = 0;
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SHA2_STEP1(A, B, C, D, E, F, G, H, 0);
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SHA2_STEP1(H, A, B, C, D, E, F, G, 1);
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SHA2_STEP1(G, H, A, B, C, D, E, F, 2);
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SHA2_STEP1(F, G, H, A, B, C, D, E, 3);
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SHA2_STEP1(E, F, G, H, A, B, C, D, 4);
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SHA2_STEP1(D, E, F, G, H, A, B, C, 5);
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SHA2_STEP1(C, D, E, F, G, H, A, B, 6);
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SHA2_STEP1(B, C, D, E, F, G, H, A, 7);
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SHA2_STEP1(A, B, C, D, E, F, G, H, 8);
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SHA2_STEP1(H, A, B, C, D, E, F, G, 9);
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SHA2_STEP1(G, H, A, B, C, D, E, F, 10);
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SHA2_STEP1(F, G, H, A, B, C, D, E, 11);
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SHA2_STEP1(E, F, G, H, A, B, C, D, 12);
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SHA2_STEP1(D, E, F, G, H, A, B, C, 13);
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SHA2_STEP1(C, D, E, F, G, H, A, B, 14);
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SHA2_STEP1(B, C, D, E, F, G, H, A, 15);
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for (pcount = 16; pcount < 64; pcount += 16) {
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SHA2_STEP2(A, B, C, D, E, F, G, H, 0);
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SHA2_STEP2(H, A, B, C, D, E, F, G, 1);
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SHA2_STEP2(G, H, A, B, C, D, E, F, 2);
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SHA2_STEP2(F, G, H, A, B, C, D, E, 3);
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SHA2_STEP2(E, F, G, H, A, B, C, D, 4);
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SHA2_STEP2(D, E, F, G, H, A, B, C, 5);
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SHA2_STEP2(C, D, E, F, G, H, A, B, 6);
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SHA2_STEP2(B, C, D, E, F, G, H, A, 7);
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SHA2_STEP2(A, B, C, D, E, F, G, H, 8);
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SHA2_STEP2(H, A, B, C, D, E, F, G, 9);
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SHA2_STEP2(G, H, A, B, C, D, E, F, 10);
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SHA2_STEP2(F, G, H, A, B, C, D, E, 11);
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SHA2_STEP2(E, F, G, H, A, B, C, D, 12);
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SHA2_STEP2(D, E, F, G, H, A, B, C, 13);
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SHA2_STEP2(C, D, E, F, G, H, A, B, 14);
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SHA2_STEP2(B, C, D, E, F, G, H, A, 15);
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}
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val[0] += A;
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val[1] += B;
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val[2] += C;
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val[3] += D;
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val[4] += E;
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val[5] += F;
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val[6] += G;
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val[7] += H;
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#endif
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}
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static void
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sha2small_update(br_sha224_context *cc, const void *data, size_t len)
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{
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const unsigned char *buf;
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size_t ptr;
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buf = data;
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ptr = (size_t)cc->count & 63;
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cc->count += (uint64_t)len;
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while (len > 0) {
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size_t clen;
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clen = 64 - ptr;
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if (clen > len) {
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clen = len;
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}
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memcpy(cc->buf + ptr, buf, clen);
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ptr += clen;
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buf += clen;
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len -= clen;
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if (ptr == 64) {
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br_sha2small_round(cc->buf, cc->val);
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ptr = 0;
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}
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}
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}
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static void
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sha2small_out(const br_sha224_context *cc, void *dst, int num)
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{
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unsigned char buf[64];
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uint32_t val[8];
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size_t ptr;
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ptr = (size_t)cc->count & 63;
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memcpy(buf, cc->buf, ptr);
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memcpy(val, cc->val, sizeof val);
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buf[ptr ++] = 0x80;
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if (ptr > 56) {
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memset(buf + ptr, 0, 64 - ptr);
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br_sha2small_round(buf, val);
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memset(buf, 0, 56);
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} else {
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memset(buf + ptr, 0, 56 - ptr);
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}
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br_enc64be(buf + 56, cc->count << 3);
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br_sha2small_round(buf, val);
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br_range_enc32be(dst, val, num);
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}
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/* see bearssl.h */
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void
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br_sha224_init(br_sha224_context *cc)
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{
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cc->vtable = &br_sha224_vtable;
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memcpy(cc->val, br_sha224_IV, sizeof cc->val);
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cc->count = 0;
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}
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/* see bearssl.h */
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void
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br_sha224_update(br_sha224_context *cc, const void *data, size_t len)
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{
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sha2small_update(cc, data, len);
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}
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/* see bearssl.h */
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void
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br_sha224_out(const br_sha224_context *cc, void *dst)
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{
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sha2small_out(cc, dst, 7);
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}
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/* see bearssl.h */
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uint64_t
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br_sha224_state(const br_sha224_context *cc, void *dst)
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{
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br_range_enc32be(dst, cc->val, 8);
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return cc->count;
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}
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/* see bearssl.h */
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void
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br_sha224_set_state(br_sha224_context *cc, const void *stb, uint64_t count)
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{
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br_range_dec32be(cc->val, 8, stb);
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cc->count = count;
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}
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/* see bearssl.h */
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void
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br_sha256_init(br_sha256_context *cc)
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{
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cc->vtable = &br_sha256_vtable;
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memcpy(cc->val, br_sha256_IV, sizeof cc->val);
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cc->count = 0;
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}
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/* see bearssl.h */
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void
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br_sha256_out(const br_sha256_context *cc, void *dst)
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{
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sha2small_out(cc, dst, 8);
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}
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/* see bearssl.h */
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const br_hash_class br_sha224_vtable = {
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sizeof(br_sha224_context),
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BR_HASHDESC_ID(br_sha224_ID)
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| BR_HASHDESC_OUT(28)
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| BR_HASHDESC_STATE(32)
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| BR_HASHDESC_LBLEN(6)
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| BR_HASHDESC_MD_PADDING
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| BR_HASHDESC_MD_PADDING_BE,
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(void (*)(const br_hash_class **))&br_sha224_init,
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(void (*)(const br_hash_class **,
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const void *, size_t))&br_sha224_update,
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(void (*)(const br_hash_class *const *, void *))&br_sha224_out,
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(uint64_t (*)(const br_hash_class *const *, void *))&br_sha224_state,
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(void (*)(const br_hash_class **, const void *, uint64_t))
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&br_sha224_set_state
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};
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/* see bearssl.h */
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const br_hash_class br_sha256_vtable = {
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sizeof(br_sha256_context),
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BR_HASHDESC_ID(br_sha256_ID)
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| BR_HASHDESC_OUT(32)
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| BR_HASHDESC_STATE(32)
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| BR_HASHDESC_LBLEN(6)
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| BR_HASHDESC_MD_PADDING
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| BR_HASHDESC_MD_PADDING_BE,
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(void (*)(const br_hash_class **))&br_sha256_init,
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(void (*)(const br_hash_class **,
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const void *, size_t))&br_sha256_update,
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(void (*)(const br_hash_class *const *, void *))&br_sha256_out,
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(uint64_t (*)(const br_hash_class *const *, void *))&br_sha256_state,
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(void (*)(const br_hash_class **, const void *, uint64_t))
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&br_sha256_set_state
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};
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