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Diffstat (limited to '')
| -rw-r--r-- | libblake_internal_blake2s_compress.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/libblake_internal_blake2s_compress.c b/libblake_internal_blake2s_compress.c new file mode 100644 index 0000000..d3c4066 --- /dev/null +++ b/libblake_internal_blake2s_compress.c @@ -0,0 +1,97 @@ +/* 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 + +static uint_least32_t +decode_uint32_le(const unsigned char *data) +{ + return (((uint_least32_t)(data[0] & 255)) << 0) | + (((uint_least32_t)(data[1] & 255)) << 8) | + (((uint_least32_t)(data[2] & 255)) << 16) | + (((uint_least32_t)(data[3] & 255)) << 24); +} + +static uint_least32_t +rotate_right(uint_least32_t x, int n) +{ + return ((x >> n) | (x << (32 - n))) & UINT_LEAST32_C(0xFFFFffff); +} + +void +libblake_internal_blake2s_compress(struct libblake_blake2s_state *state, const unsigned char *data) +{ + uint_least32_t v[16], m[16]; + + memcpy(v, state->h, sizeof(state->h)); + v[8] = UINT_LEAST32_C(0x6A09E667); + v[9] = UINT_LEAST32_C(0xBB67AE85); + v[A] = UINT_LEAST32_C(0x3C6EF372); + v[B] = UINT_LEAST32_C(0xA54FF53A); + v[C] = UINT_LEAST32_C(0x510E527F) ^ state->t[0]; + v[D] = UINT_LEAST32_C(0x9B05688C) ^ state->t[1]; + v[E] = UINT_LEAST32_C(0x1F83D9AB) ^ state->f[0]; + v[F] = UINT_LEAST32_C(0x5BE0CD19) ^ state->f[1]; + + m[0] = decode_uint32_le(&data[0 * 4]); + m[1] = decode_uint32_le(&data[1 * 4]); + m[2] = decode_uint32_le(&data[2 * 4]); + m[3] = decode_uint32_le(&data[3 * 4]); + m[4] = decode_uint32_le(&data[4 * 4]); + m[5] = decode_uint32_le(&data[5 * 4]); + m[6] = decode_uint32_le(&data[6 * 4]); + m[7] = decode_uint32_le(&data[7 * 4]); + m[8] = decode_uint32_le(&data[8 * 4]); + m[9] = decode_uint32_le(&data[9 * 4]); + m[A] = decode_uint32_le(&data[A * 4]); + m[B] = decode_uint32_le(&data[B * 4]); + m[C] = decode_uint32_le(&data[C * 4]); + m[D] = decode_uint32_le(&data[D * 4]); + m[E] = decode_uint32_le(&data[E * 4]); + m[F] = decode_uint32_le(&data[F * 4]); + +#define G2S(mj, mk, a, b, c, d)\ + a = (a + b + mj) & 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) & UINT_LEAST32_C(0xFFFFffff);\ + d = rotate_right(d ^ a, 8);\ + c = (c + d) & UINT_LEAST32_C(0xFFFFffff);\ + b = rotate_right(b ^ c, 7) + +#define ROUND2S(S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, SA, SB, SC, SD, SE, SF)\ + G2S(m[S0], m[S1], v[0], v[4], v[8], v[C]);\ + G2S(m[S2], m[S3], v[1], v[5], v[9], v[D]);\ + G2S(m[S4], m[S5], v[2], v[6], v[A], v[E]);\ + G2S(m[S6], m[S7], v[3], v[7], v[B], v[F]);\ + G2S(m[S8], m[S9], v[0], v[5], v[A], v[F]);\ + G2S(m[SA], m[SB], v[1], v[6], v[B], v[C]);\ + G2S(m[SC], m[SD], v[2], v[7], v[8], v[D]);\ + G2S(m[SE], m[SF], v[3], v[4], v[9], v[E]) + + ROUND2S(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F); + ROUND2S(E, A, 4, 8, 9, F, D, 6, 1, C, 0, 2, B, 7, 5, 3); + ROUND2S(B, 8, C, 0, 5, 2, F, D, A, E, 3, 6, 7, 1, 9, 4); + ROUND2S(7, 9, 3, 1, D, C, B, E, 2, 6, 5, A, 4, 0, F, 8); + ROUND2S(9, 0, 5, 7, 2, 4, A, F, E, 1, B, C, 6, 8, 3, D); + ROUND2S(2, C, 6, A, 0, B, 8, 3, 4, D, 7, 5, F, E, 1, 9); + ROUND2S(C, 5, 1, F, E, D, 4, A, 0, 7, 6, 3, 9, 2, 8, B); + ROUND2S(D, B, 7, E, C, 1, 3, 9, 5, 0, F, 4, 8, 6, 2, A); + ROUND2S(6, F, E, 9, B, 3, 0, 8, C, 2, D, 7, 1, 4, A, 5); + ROUND2S(A, 2, 8, 4, 7, 6, 1, 5, F, B, 9, E, 3, C, D, 0); + + state->h[0] ^= v[0] ^ v[8]; + state->h[1] ^= v[1] ^ v[9]; + state->h[2] ^= v[2] ^ v[A]; + state->h[3] ^= v[3] ^ v[B]; + state->h[4] ^= v[4] ^ v[C]; + state->h[5] ^= v[5] ^ v[D]; + state->h[6] ^= v[6] ^ v[E]; + state->h[7] ^= v[7] ^ v[F]; +} |