diff options
Diffstat (limited to 'src/hash/sha2-256.c')
| -rw-r--r-- | src/hash/sha2-256.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/src/hash/sha2-256.c b/src/hash/sha2-256.c new file mode 100644 index 0000000..34afe63 --- /dev/null +++ b/src/hash/sha2-256.c @@ -0,0 +1,211 @@ +#include "../i_util.h" +#include "../crypto.h" +#include <stdlib.h> +#include <string.h> +#include <stdint.h> +#include <stdio.h> + +void endian_swap128(__uint128_t *x){ + uint8_t *y = (uint8_t*)x; + for (size_t low = 0, high = sizeof(__uint128_t) - 1; high > low; low++, high--){ + y[low] ^= y[high]; + y[high] ^= y[low]; + y[low] ^= y[high]; + } +} + +void endian_swap64(uint64_t *x){ + uint8_t *y = (uint8_t*)x; + for (size_t low = 0, high = sizeof(uint64_t) - 1; high > low; low++, high--){ + y[low] ^= y[high]; + y[high] ^= y[low]; + y[low] ^= y[high]; + } +} + +struct iv { + uint64_t h0, h1, h2, h3, h4, h5, h6, h7; +}; + +static const struct iv sha512_iv = {.h0 = 0x6a09e667f3bcc908, .h1 = 0xbb67ae8584caa73b, .h2 = 0x3c6ef372fe94f82b, .h3 = 0xa54ff53a5f1d36f1, + .h4 = 0x510e527fade682d1, .h5 = 0x9b05688c2b3e6c1f, .h6 = 0x1f83d9abfb41bd6b, .h7 = 0x5be0cd19137e2179}; + +static const struct iv sha384_iv = {.h0 = 0xcbbb9d5dc1059ed8, .h1 = 0x629a292a367cd507, .h2 = 0x9159015a3070dd17, .h3 = 0x152fecd8f70e5939, + .h4 = 0x67332667ffc00b31, .h5 = 0x8eb44a8768581511, .h6 = 0xdb0c2e0d64f98fa7, .h7 = 0x47b5481dbefa4fa4}; + +void sha512_gen(uint64_t* out_stream, uint8_t* input, struct iv sha_iv){ + uint64_t h0 = sha_iv.h0, h1 = sha_iv.h1, h2 = sha_iv.h2, h3 = sha_iv.h3, h4 = sha_iv.h4, h5 = sha_iv.h5, h6 = sha_iv.h6, h7 = sha_iv.h7; + + const uint64_t k[80] = {0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, 0xe9b5dba58189dbbc, 0x3956c25bf348b538, + 0x59f111f1b605d019, 0x923f82a4af194f9b, 0xab1c5ed5da6d8118, 0xd807aa98a3030242, 0x12835b0145706fbe, + 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2, 0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235, + 0xc19bf174cf692694, 0xe49b69c19ef14ad2, 0xefbe4786384f25e3, 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65, + 0x2de92c6f592b0275, 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5, 0x983e5152ee66dfab, + 0xa831c66d2db43210, 0xb00327c898fb213f, 0xbf597fc7beef0ee4, 0xc6e00bf33da88fc2, 0xd5a79147930aa725, + 0x06ca6351e003826f, 0x142929670a0e6e70, 0x27b70a8546d22ffc, 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, + 0x53380d139d95b3df, 0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6, 0x92722c851482353b, + 0xa2bfe8a14cf10364, 0xa81a664bbc423001, 0xc24b8b70d0f89791, 0xc76c51a30654be30, 0xd192e819d6ef5218, + 0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8, 0x19a4c116b8d2d0c8, 0x1e376c085141ab53, + 0x2748774cdf8eeb99, 0x34b0bcb5e19b48a8, 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, 0x5b9cca4f7763e373, + 0x682e6ff3d6b2b8a3, 0x748f82ee5defb2fc, 0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec, + 0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915, 0xc67178f2e372532b, 0xca273eceea26619c, + 0xd186b8c721c0c207, 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178, 0x06f067aa72176fba, 0x0a637dc5a2c898a6, + 0x113f9804bef90dae, 0x1b710b35131c471b, 0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc, + 0x431d67c49c100d4c, 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, 0x5fcb6fab3ad6faec, 0x6c44198c4a475817}; + + size_t len = 0; + for(int i = 0; input[i]!='\0'; i++) len++; + + size_t blen = len*8; + int ulen = 0; + + size_t l = len * 8; + size_t k2 = (896 - ( (l + 1) % 1024 )) % 1024; + + ulen = ((l + k2 + 1) / 8) + 16; + uint64_t tlen = ulen/128; + uint8_t* by = calloc(ulen, sizeof * by); + for (size_t i = 0; i < len; i++) + by[i] = input[i]; + by[len] = 0x80; + + //this part is very lame + __uint128_t bigL = l; + endian_swap128(&bigL); + memcpy(&by[ulen - sizeof(__uint128_t)], &bigL, sizeof(__uint128_t)); + + uint64_t *msg = ((uint64_t*)&by[0]); + for (int i = 0; i < tlen * 16; i++) + endian_swap64(msg++); + + for(int z = 0; z < (int)tlen; z++){ + uint64_t* M = ((uint64_t*)(by)); + uint64_t W[80]; + + //i dont really understand this 0->16 part + uint64_t *m = &M[(z * 16)]; + for (int i = 0; i < 16; ++i){ + W[i] = *m; + ++m; + } + + for (int i = 16; i != 80; i++){ + W[i] = (i_rr64(W[i - 2],19) ^ i_rr64(W[i - 2], 61) ^ (W[i - 2] >> 6)) + + W[i - 7] + (i_rr64(W[i - 15],1) ^ i_rr64(W[i - 15],8) ^ (W[i - 15] >> 7)) + W[i - 16]; + } + + uint64_t a = h0; + uint64_t b = h1; + uint64_t c = h2; + uint64_t d = h3; + uint64_t e = h4; + uint64_t f = h5; + uint64_t g = h6; + uint64_t h = h7; + + for(int i = 0; i != 80; i++){ + uint64_t S1 = i_rr64(e, 14) ^ i_rr64(e, 18) ^ i_rr64(e, 41); + uint64_t ch = (e & f) ^ ((~e) & g); + uint64_t temp1 = h + S1 + ch + k[i] + W[i]; + + uint64_t S0 = i_rr64(a, 28) ^ i_rr64(a, 34) ^ i_rr64(a, 39); + uint64_t maj = (a & b) ^ (a & c) ^ (b & c); + uint64_t temp2 = S0 + maj; + + h = g; + g = f; + f = e; + e = d + temp1; + d = c; + c = b; + b = a; + a = temp1 + temp2; + } + + h0 += a; + h1 += b; + h2 += c; + h3 += d; + h4 += e; + h5 += f; + h6 += g; + h7 += h; + + } + out_stream[0] = h0; + out_stream[1] = h1; + out_stream[2] = h2; + out_stream[3] = h3; + out_stream[4] = h4; + out_stream[5] = h5; + out_stream[6] = h6; + out_stream[7] = h7; + free(by); + return; +} + +struct iv sha_iv_gen(int i){ + struct iv oh = {.h0 = sha512_iv.h0 ^ 0xa5a5a5a5a5a5a5a5, .h1 = sha512_iv.h1 ^ 0xa5a5a5a5a5a5a5a5, .h2 = sha512_iv.h2 ^ 0xa5a5a5a5a5a5a5a5, + .h3 = sha512_iv.h3 ^ 0xa5a5a5a5a5a5a5a5, .h4 = sha512_iv.h4 ^ 0xa5a5a5a5a5a5a5a5, .h5 = sha512_iv.h5 ^ 0xa5a5a5a5a5a5a5a5, + .h6 = sha512_iv.h6 ^ 0xa5a5a5a5a5a5a5a5, .h7 = sha512_iv.h7 ^ 0xa5a5a5a5a5a5a5a5}; + + uint64_t nh[8] = {0}; + uint8_t in[12]; + sprintf((char*)in, "SHA-512/%i",i); + sha512_gen(nh, in, oh); + return (struct iv){.h0 = nh[0], .h1 = nh[1], .h2 = nh[2], .h3 = nh[3], .h4 = nh[4], .h5 = nh[5], .h6 = nh[6], .h7 = nh[7]}; +} + +void sha2_512_t(uint8_t* out, uint8_t* in, int t){ + if(t%8!=0) return; + uint64_t out_stream[8] = {0}; + sha512_gen(out_stream, in, sha_iv_gen(t)); + for(int i = 0; i != 8; i++) sprintf((char*)out, "%s%016lx", out, out_stream[i]); + out[t/4] = '\0'; +} + +void sha2_512(uint8_t* out, uint8_t* in){ + uint64_t out_stream[8] = {0}; + sha512_gen(out_stream, in, sha512_iv); + for(int i = 0; i != 8; i++) sprintf((char*)out, "%s%016lx", out, out_stream[i]); +} + +void sha2_384(uint8_t* out, uint8_t* in){ + uint64_t out_stream[8] = {0}; + sha512_gen(out_stream, in, sha384_iv); + for(int i = 0; i != 6; i++) sprintf((char*)out, "%s%016lx", out, out_stream[i]); +} + +int l_sha512(lua_State* L){ + size_t len = 0; + uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len); + + char digest[512] = {0}; + + sha2_512((uint8_t*)digest, a); + lua_pushstring(L, digest); + return 1; +} + +int l_sha384(lua_State* L){ + size_t len = 0; + uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len); + + char digest[384] = {0}; + + sha2_384((uint8_t*)digest, a); + lua_pushstring(L, digest); + return 1; +} + +int l_sha512_t(lua_State* L){ + size_t len = 0; + uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len); + uint64_t t = luaL_checkinteger(L, 2); + + char digest[512] = {0}; + + sha2_512_t((uint8_t*)digest, a, t); + lua_pushstring(L, digest); + return 1; +} |