You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
196 lines
6.7 KiB
196 lines
6.7 KiB
#include "git-compat-util.h" |
|
#include "./sha256.h" |
|
|
|
#undef RND |
|
#undef BLKSIZE |
|
|
|
#define BLKSIZE blk_SHA256_BLKSIZE |
|
|
|
void blk_SHA256_Init(blk_SHA256_CTX *ctx) |
|
{ |
|
ctx->offset = 0; |
|
ctx->size = 0; |
|
ctx->state[0] = 0x6a09e667ul; |
|
ctx->state[1] = 0xbb67ae85ul; |
|
ctx->state[2] = 0x3c6ef372ul; |
|
ctx->state[3] = 0xa54ff53aul; |
|
ctx->state[4] = 0x510e527ful; |
|
ctx->state[5] = 0x9b05688cul; |
|
ctx->state[6] = 0x1f83d9abul; |
|
ctx->state[7] = 0x5be0cd19ul; |
|
} |
|
|
|
static inline uint32_t ror(uint32_t x, unsigned n) |
|
{ |
|
return (x >> n) | (x << (32 - n)); |
|
} |
|
|
|
static inline uint32_t ch(uint32_t x, uint32_t y, uint32_t z) |
|
{ |
|
return z ^ (x & (y ^ z)); |
|
} |
|
|
|
static inline uint32_t maj(uint32_t x, uint32_t y, uint32_t z) |
|
{ |
|
return ((x | y) & z) | (x & y); |
|
} |
|
|
|
static inline uint32_t sigma0(uint32_t x) |
|
{ |
|
return ror(x, 2) ^ ror(x, 13) ^ ror(x, 22); |
|
} |
|
|
|
static inline uint32_t sigma1(uint32_t x) |
|
{ |
|
return ror(x, 6) ^ ror(x, 11) ^ ror(x, 25); |
|
} |
|
|
|
static inline uint32_t gamma0(uint32_t x) |
|
{ |
|
return ror(x, 7) ^ ror(x, 18) ^ (x >> 3); |
|
} |
|
|
|
static inline uint32_t gamma1(uint32_t x) |
|
{ |
|
return ror(x, 17) ^ ror(x, 19) ^ (x >> 10); |
|
} |
|
|
|
static void blk_SHA256_Transform(blk_SHA256_CTX *ctx, const unsigned char *buf) |
|
{ |
|
|
|
uint32_t S[8], W[64], t0, t1; |
|
int i; |
|
|
|
/* copy state into S */ |
|
for (i = 0; i < 8; i++) |
|
S[i] = ctx->state[i]; |
|
|
|
/* copy the state into 512-bits into W[0..15] */ |
|
for (i = 0; i < 16; i++, buf += sizeof(uint32_t)) |
|
W[i] = get_be32(buf); |
|
|
|
/* fill W[16..63] */ |
|
for (i = 16; i < 64; i++) |
|
W[i] = gamma1(W[i - 2]) + W[i - 7] + gamma0(W[i - 15]) + W[i - 16]; |
|
|
|
#define RND(a,b,c,d,e,f,g,h,i,ki) \ |
|
t0 = h + sigma1(e) + ch(e, f, g) + ki + W[i]; \ |
|
t1 = sigma0(a) + maj(a, b, c); \ |
|
d += t0; \ |
|
h = t0 + t1; |
|
|
|
RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],0,0x428a2f98); |
|
RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],1,0x71374491); |
|
RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],2,0xb5c0fbcf); |
|
RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],3,0xe9b5dba5); |
|
RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],4,0x3956c25b); |
|
RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],5,0x59f111f1); |
|
RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],6,0x923f82a4); |
|
RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],7,0xab1c5ed5); |
|
RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],8,0xd807aa98); |
|
RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],9,0x12835b01); |
|
RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],10,0x243185be); |
|
RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],11,0x550c7dc3); |
|
RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],12,0x72be5d74); |
|
RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],13,0x80deb1fe); |
|
RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],14,0x9bdc06a7); |
|
RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],15,0xc19bf174); |
|
RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],16,0xe49b69c1); |
|
RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],17,0xefbe4786); |
|
RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],18,0x0fc19dc6); |
|
RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],19,0x240ca1cc); |
|
RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],20,0x2de92c6f); |
|
RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],21,0x4a7484aa); |
|
RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],22,0x5cb0a9dc); |
|
RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],23,0x76f988da); |
|
RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],24,0x983e5152); |
|
RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],25,0xa831c66d); |
|
RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],26,0xb00327c8); |
|
RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],27,0xbf597fc7); |
|
RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],28,0xc6e00bf3); |
|
RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],29,0xd5a79147); |
|
RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],30,0x06ca6351); |
|
RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],31,0x14292967); |
|
RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],32,0x27b70a85); |
|
RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],33,0x2e1b2138); |
|
RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],34,0x4d2c6dfc); |
|
RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],35,0x53380d13); |
|
RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],36,0x650a7354); |
|
RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],37,0x766a0abb); |
|
RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],38,0x81c2c92e); |
|
RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],39,0x92722c85); |
|
RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],40,0xa2bfe8a1); |
|
RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],41,0xa81a664b); |
|
RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],42,0xc24b8b70); |
|
RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],43,0xc76c51a3); |
|
RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],44,0xd192e819); |
|
RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],45,0xd6990624); |
|
RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],46,0xf40e3585); |
|
RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],47,0x106aa070); |
|
RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],48,0x19a4c116); |
|
RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],49,0x1e376c08); |
|
RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],50,0x2748774c); |
|
RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],51,0x34b0bcb5); |
|
RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],52,0x391c0cb3); |
|
RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],53,0x4ed8aa4a); |
|
RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],54,0x5b9cca4f); |
|
RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],55,0x682e6ff3); |
|
RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],56,0x748f82ee); |
|
RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],57,0x78a5636f); |
|
RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],58,0x84c87814); |
|
RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],59,0x8cc70208); |
|
RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],60,0x90befffa); |
|
RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],61,0xa4506ceb); |
|
RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],62,0xbef9a3f7); |
|
RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],63,0xc67178f2); |
|
|
|
for (i = 0; i < 8; i++) |
|
ctx->state[i] += S[i]; |
|
} |
|
|
|
void blk_SHA256_Update(blk_SHA256_CTX *ctx, const void *data, size_t len) |
|
{ |
|
unsigned int len_buf = ctx->size & 63; |
|
|
|
ctx->size += len; |
|
|
|
/* Read the data into buf and process blocks as they get full */ |
|
if (len_buf) { |
|
unsigned int left = 64 - len_buf; |
|
if (len < left) |
|
left = len; |
|
memcpy(len_buf + ctx->buf, data, left); |
|
len_buf = (len_buf + left) & 63; |
|
len -= left; |
|
data = ((const char *)data + left); |
|
if (len_buf) |
|
return; |
|
blk_SHA256_Transform(ctx, ctx->buf); |
|
} |
|
while (len >= 64) { |
|
blk_SHA256_Transform(ctx, data); |
|
data = ((const char *)data + 64); |
|
len -= 64; |
|
} |
|
if (len) |
|
memcpy(ctx->buf, data, len); |
|
} |
|
|
|
void blk_SHA256_Final(unsigned char *digest, blk_SHA256_CTX *ctx) |
|
{ |
|
static const unsigned char pad[64] = { 0x80 }; |
|
unsigned int padlen[2]; |
|
int i; |
|
|
|
/* Pad with a binary 1 (ie 0x80), then zeroes, then length */ |
|
padlen[0] = htonl((uint32_t)(ctx->size >> 29)); |
|
padlen[1] = htonl((uint32_t)(ctx->size << 3)); |
|
|
|
i = ctx->size & 63; |
|
blk_SHA256_Update(ctx, pad, 1 + (63 & (55 - i))); |
|
blk_SHA256_Update(ctx, padlen, 8); |
|
|
|
/* copy output */ |
|
for (i = 0; i < 8; i++, digest += sizeof(uint32_t)) |
|
put_be32(digest, ctx->state[i]); |
|
}
|
|
|