diff options
Diffstat (limited to 'sqmail-4.3.07/src/sha256.c')
-rw-r--r-- | sqmail-4.3.07/src/sha256.c | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/sqmail-4.3.07/src/sha256.c b/sqmail-4.3.07/src/sha256.c deleted file mode 100644 index e5ba5dd..0000000 --- a/sqmail-4.3.07/src/sha256.c +++ /dev/null @@ -1,167 +0,0 @@ -/* - * SHA256 - * - * The author (Brad Conte) has released this file "into the public domain free - * of any restrictions". This file is unchanged except for some style - * clean-up and argument order for sha256_hash (feh). - */ - -#include <stdint.h> -#include <string.h> -#include "sha256.h" - -// DBL_INT_ADD treats two unsigned ints a and b as one 64-bit integer and adds c to it - -#define DBL_INT_ADD(a,b,c) if (a > 0xffffffff - (c)) ++b; a += c; -#define ROTLEFT(a,b) (((a) << (b)) | ((a) >> (32-(b)))) -#define ROTRIGHT(a,b) (((a) >> (b)) | ((a) << (32-(b)))) - -#define CH(x,y,z) (((x) & (y)) ^ (~(x) & (z))) -#define MAJ(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) -#define EP0(x) (ROTRIGHT(x,2) ^ ROTRIGHT(x,13) ^ ROTRIGHT(x,22)) -#define EP1(x) (ROTRIGHT(x,6) ^ ROTRIGHT(x,11) ^ ROTRIGHT(x,25)) -#define SIG0(x) (ROTRIGHT(x,7) ^ ROTRIGHT(x,18) ^ ((x) >> 3)) -#define SIG1(x) (ROTRIGHT(x,17) ^ ROTRIGHT(x,19) ^ ((x) >> 10)) - -uint32_t k[64] = -{ - 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, - 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, - 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, - 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, - 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, - 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, - 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, - 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, - 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, - 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, - 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 -}; - -static void sha256_transform(sha256_ctx *ctx, uint8_t *data) -{ - uint32_t a, b, c, d, e, f, g, h, i, j, t1, t2, m[64]; - - for (i = 0, j = 0; i < 16; ++i, j += 4) - m[i] = (data[j] << 24) | (data[j+1] << 16) | (data[j+2] << 8) | (data[j+3]); - for (; i < 64; ++i) - m[i] = SIG1(m[i-2]) + m[i-7] + SIG0(m[i-15]) + m[i-16]; - - a = ctx->state[0]; - b = ctx->state[1]; - c = ctx->state[2]; - d = ctx->state[3]; - e = ctx->state[4]; - f = ctx->state[5]; - g = ctx->state[6]; - h = ctx->state[7]; - - for (i = 0; i < 64; ++i) { - t1 = h + EP1(e) + CH(e,f,g) + k[i] + m[i]; - t2 = EP0(a) + MAJ(a,b,c); - h = g; - g = f; - f = e; - e = d + t1; - d = c; - c = b; - b = a; - a = t1 + t2; - } - - ctx->state[0] += a; - ctx->state[1] += b; - ctx->state[2] += c; - ctx->state[3] += d; - ctx->state[4] += e; - ctx->state[5] += f; - ctx->state[6] += g; - ctx->state[7] += h; -} - -static void sha256_init(sha256_ctx *ctx) -{ - ctx->datalen = 0; - ctx->bitlen[0] = 0; - ctx->bitlen[1] = 0; - ctx->state[0] = 0x6a09e667; - ctx->state[1] = 0xbb67ae85; - ctx->state[2] = 0x3c6ef372; - ctx->state[3] = 0xa54ff53a; - ctx->state[4] = 0x510e527f; - ctx->state[5] = 0x9b05688c; - ctx->state[6] = 0x1f83d9ab; - ctx->state[7] = 0x5be0cd19; -} - -static void sha256_update(sha256_ctx *ctx, uint8_t *data, uint32_t len) -{ - uint32_t i; - - for (i=0; i < len; ++i) { - ctx->data[ctx->datalen] = data[i]; - ctx->datalen++; - if (ctx->datalen == 64) { - sha256_transform(ctx,ctx->data); - DBL_INT_ADD(ctx->bitlen[0],ctx->bitlen[1],512); - ctx->datalen = 0; - } - } -} - -static void sha256_final(uint8_t *hash,sha256_ctx *ctx) -{ - uint32_t i; - - i = ctx->datalen; - -// Pad whatever data is left in the buffer. - - if (ctx->datalen < 56) { - ctx->data[i++] = 0x80; - while (i < 56) - ctx->data[i++] = 0x00; - } - else { - ctx->data[i++] = 0x80; - while (i < 64) - ctx->data[i++] = 0x00; - sha256_transform(ctx,ctx->data); - memset(ctx->data,0,56); - } - -// Append to the padding the total message's length in bits and transform. - - DBL_INT_ADD(ctx->bitlen[0],ctx->bitlen[1],ctx->datalen * 8); - ctx->data[63] = ctx->bitlen[0]; - ctx->data[62] = ctx->bitlen[0] >> 8; - ctx->data[61] = ctx->bitlen[0] >> 16; - ctx->data[60] = ctx->bitlen[0] >> 24; - ctx->data[59] = ctx->bitlen[1]; - ctx->data[58] = ctx->bitlen[1] >> 8; - ctx->data[57] = ctx->bitlen[1] >> 16; - ctx->data[56] = ctx->bitlen[1] >> 24; - sha256_transform(ctx,ctx->data); - -// Since this implementation uses little endian byte ordering and SHA uses -// big endian, reverse all the bytes when copying the final state to the output hash. - - for (i = 0; i < 4; ++i) { - hash[i] = (ctx->state[0] >> (24-i*8)) & 0x000000ff; - hash[i+4] = (ctx->state[1] >> (24-i*8)) & 0x000000ff; - hash[i+8] = (ctx->state[2] >> (24-i*8)) & 0x000000ff; - hash[i+12] = (ctx->state[3] >> (24-i*8)) & 0x000000ff; - hash[i+16] = (ctx->state[4] >> (24-i*8)) & 0x000000ff; - hash[i+20] = (ctx->state[5] >> (24-i*8)) & 0x000000ff; - hash[i+24] = (ctx->state[6] >> (24-i*8)) & 0x000000ff; - hash[i+28] = (ctx->state[7] >> (24-i*8)) & 0x000000ff; - } -} - -extern void sha256_hash(char *hash,const char *data,size_t len) -{ - sha256_ctx ctx; - sha256_init(&ctx); - sha256_update(&ctx,(uint8_t *)data,(int)len); - sha256_final((uint8_t *)hash,&ctx); -} |