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Diffstat (limited to '')
| -rw-r--r-- | libblake_internal_blakes_update.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/libblake_internal_blakes_update.c b/libblake_internal_blakes_update.c new file mode 100644 index 0000000..389b5cc --- /dev/null +++ b/libblake_internal_blakes_update.c @@ -0,0 +1,132 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + +#define A 10 +#define B 11 +#define C 12 +#define D 13 +#define E 14 +#define F 15 + +#define CS0 UINT_LEAST32_C(0x243F6A88) +#define CS1 UINT_LEAST32_C(0x85A308D3) +#define CS2 UINT_LEAST32_C(0x13198A2E) +#define CS3 UINT_LEAST32_C(0x03707344) +#define CS4 UINT_LEAST32_C(0xA4093822) +#define CS5 UINT_LEAST32_C(0x299F31D0) +#define CS6 UINT_LEAST32_C(0x082EFA98) +#define CS7 UINT_LEAST32_C(0xEC4E6C89) +#define CS8 UINT_LEAST32_C(0x452821E6) +#define CS9 UINT_LEAST32_C(0x38D01377) +#define CSA UINT_LEAST32_C(0xBE5466CF) +#define CSB UINT_LEAST32_C(0x34E90C6C) +#define CSC UINT_LEAST32_C(0xC0AC29B7) +#define CSD UINT_LEAST32_C(0xC97C50DD) +#define CSE UINT_LEAST32_C(0x3F84D5B5) +#define CSF UINT_LEAST32_C(0xB5470917) + +static uint_least32_t +decode_uint32_be(const unsigned char *data) +{ + return (((uint_least32_t)(data[0] & 255)) << 24) | + (((uint_least32_t)(data[1] & 255)) << 16) | + (((uint_least32_t)(data[2] & 255)) << 8) | + (((uint_least32_t)(data[3] & 255)) << 0); +} + +static uint_least32_t +rotate_right(uint_least32_t x, int n) +{ + return ((x >> n) | (x << (32 - n))) & UINT_LEAST32_C(0xFFFFffff); +} + +size_t +libblake_internal_blakes_update(struct libblake_blakes_state *state, const unsigned char *data, size_t len) +{ + size_t ret = 0; + struct libblake_blakes_state s; + uint_least32_t v[16], m[16]; + + memcpy(&s, state, sizeof(s)); + + for (; len - ret >= 64; ret += 64, data = &data[64]) { + s.t[0] += 512; + if ((s.t[0] & UINT_LEAST32_C(0xFFFFffff)) < 512) + s.t[1] = (s.t[1] + 1) & UINT_LEAST32_C(0xFFFFffff); + + memcpy(v, s.h, sizeof(s.h)); + v[8] = s.s[0] ^ CS0; + v[9] = s.s[1] ^ CS1; + v[10] = s.s[2] ^ CS2; + v[11] = s.s[3] ^ CS3; + v[12] = s.t[0] ^ CS4; + v[13] = s.t[0] ^ CS5; + v[14] = s.t[1] ^ CS6; + v[15] = s.t[1] ^ CS7; + + m[0] = decode_uint32_be(&data[0 * 4]); + m[1] = decode_uint32_be(&data[1 * 4]); + m[2] = decode_uint32_be(&data[2 * 4]); + m[3] = decode_uint32_be(&data[3 * 4]); + m[4] = decode_uint32_be(&data[4 * 4]); + m[5] = decode_uint32_be(&data[5 * 4]); + m[6] = decode_uint32_be(&data[6 * 4]); + m[7] = decode_uint32_be(&data[7 * 4]); + m[8] = decode_uint32_be(&data[8 * 4]); + m[9] = decode_uint32_be(&data[9 * 4]); + m[A] = decode_uint32_be(&data[A * 4]); + m[B] = decode_uint32_be(&data[B * 4]); + m[C] = decode_uint32_be(&data[C * 4]); + m[D] = decode_uint32_be(&data[D * 4]); + m[E] = decode_uint32_be(&data[E * 4]); + m[F] = decode_uint32_be(&data[F * 4]); + +#define GS(mj, mk, nj, nk, a, b, c, d)\ + a = (a + b + (mj ^ nk)) & UINT_LEAST32_C(0xFFFFffff);\ + d = rotate_right(d ^ a, 16);\ + c = (c + d) & UINT_LEAST32_C(0xFFFFffff);\ + b = rotate_right(b ^ c, 12);\ + a = (a + b + (mk ^ nj)) & UINT_LEAST32_C(0xFFFFffff);\ + d = rotate_right(d ^ a, 8);\ + c = (c + d) & UINT_LEAST32_C(0xFFFFffff);\ + b = rotate_right(b ^ c, 7) + +#define ROUNDS(S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, SA, SB, SC, SD, SE, SF)\ + GS(m[S0], m[S1], CS##S0, CS##S1, v[0], v[4], v[8], v[C]);\ + GS(m[S2], m[S3], CS##S2, CS##S3, v[1], v[5], v[9], v[D]);\ + GS(m[S4], m[S5], CS##S4, CS##S5, v[2], v[6], v[A], v[E]);\ + GS(m[S6], m[S7], CS##S6, CS##S7, v[3], v[7], v[B], v[F]);\ + GS(m[S8], m[S9], CS##S8, CS##S9, v[0], v[5], v[A], v[F]);\ + GS(m[SA], m[SB], CS##SA, CS##SB, v[1], v[6], v[B], v[C]);\ + GS(m[SC], m[SD], CS##SC, CS##SD, v[2], v[7], v[8], v[D]);\ + GS(m[SE], m[SF], CS##SE, CS##SF, v[3], v[4], v[9], v[E]) + + ROUNDS(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F); + ROUNDS(E, A, 4, 8, 9, F, D, 6, 1, C, 0, 2, B, 7, 5, 3); + ROUNDS(B, 8, C, 0, 5, 2, F, D, A, E, 3, 6, 7, 1, 9, 4); + ROUNDS(7, 9, 3, 1, D, C, B, E, 2, 6, 5, A, 4, 0, F, 8); + ROUNDS(9, 0, 5, 7, 2, 4, A, F, E, 1, B, C, 6, 8, 3, D); + ROUNDS(2, C, 6, A, 0, B, 8, 3, 4, D, 7, 5, F, E, 1, 9); + ROUNDS(C, 5, 1, F, E, D, 4, A, 0, 7, 6, 3, 9, 2, 8, B); + ROUNDS(D, B, 7, E, C, 1, 3, 9, 5, 0, F, 4, 8, 6, 2, A); + ROUNDS(6, F, E, 9, B, 3, 0, 8, C, 2, D, 7, 1, 4, A, 5); + ROUNDS(A, 2, 8, 4, 7, 6, 1, 5, F, B, 9, E, 3, C, D, 0); + ROUNDS(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F); + ROUNDS(E, A, 4, 8, 9, F, D, 6, 1, C, 0, 2, B, 7, 5, 3); + ROUNDS(B, 8, C, 0, 5, 2, F, D, A, E, 3, 6, 7, 1, 9, 4); + ROUNDS(7, 9, 3, 1, D, C, B, E, 2, 6, 5, A, 4, 0, F, 8); + + s.h[0] ^= s.s[0] ^ v[0] ^ v[8]; + s.h[1] ^= s.s[1] ^ v[1] ^ v[9]; + s.h[2] ^= s.s[2] ^ v[2] ^ v[A]; + s.h[3] ^= s.s[3] ^ v[3] ^ v[B]; + s.h[4] ^= s.s[0] ^ v[4] ^ v[C]; + s.h[5] ^= s.s[1] ^ v[5] ^ v[D]; + s.h[6] ^= s.s[2] ^ v[6] ^ v[E]; + s.h[7] ^= s.s[3] ^ v[7] ^ v[F]; + } + + memcpy(state, &s, sizeof(s)); + + return ret; +} |