tevador
4 years ago
parent
9e9b8c7464
commit
f1c7829f04
@ -0,0 +1,65 @@
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/*
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Copyright (c) 2020 tevador <tevador@gmail.com>
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All rights reserved.
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*/
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#include "sha256/hash_impl.h"
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#include <string.h>
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#include <stdint.h>
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#define BLOCK_SIZE 32
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typedef struct pbkdf_state {
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int iterations;
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uint32_t block_count;
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uint8_t block[BLOCK_SIZE];
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} pbkdf_state;
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static void pbkdf2_transform(const uint8_t* password, size_t pw_size,
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const uint8_t* salt, size_t salt_size, pbkdf_state* state)
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{
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hmac_sha256_state hash_state;
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hmac_sha256_initialize(&hash_state, password, pw_size);
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hmac_sha256_write(&hash_state, salt, salt_size);
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uint8_t block_buff[4];
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//big endian
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block_buff[0] = state->block_count >> 24;
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block_buff[1] = state->block_count >> 16;
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block_buff[2] = state->block_count >> 8;
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block_buff[3] = state->block_count;
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hmac_sha256_write(&hash_state, block_buff, sizeof(block_buff));
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hmac_sha256_finalize(&hash_state, state->block);
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hmac_sha256_initialize(&hash_state, password, pw_size);
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uint8_t temp[BLOCK_SIZE];
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memcpy(temp, state->block, BLOCK_SIZE);
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for (unsigned i = 2; i <= state->iterations; ++i) {
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hmac_sha256_write(&hash_state, temp, sizeof(temp));
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hmac_sha256_finalize(&hash_state, temp);
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for (unsigned j = 0; j < BLOCK_SIZE; ++j) {
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state->block[j] ^= temp[j];
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}
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hmac_sha256_initialize(&hash_state, password, pw_size);
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}
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state->block_count++;
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}
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void pbkdf2_hmac_sha256(const uint8_t* password, size_t pw_size,
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uint8_t* salt, size_t salt_size,
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int iterations, uint8_t* key, size_t key_size)
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{
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pbkdf_state state = {
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.block_count = 1,
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.iterations = iterations
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};
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while (key_size > 0) {
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pbkdf2_transform(password, pw_size, salt, salt_size, &state);
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size_t block_size = key_size > BLOCK_SIZE ? BLOCK_SIZE : key_size;
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memcpy(key, state.block, block_size);
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key += BLOCK_SIZE;
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key_size -= BLOCK_SIZE;
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}
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}
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@ -0,0 +1,20 @@
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/*
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Copyright (c) 2020 tevador <tevador@gmail.com>
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All rights reserved.
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*/
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#pragma once
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#include <stddef.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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void pbkdf2_hmac_sha256(const uint8_t* password, size_t pw_size,
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const uint8_t* salt, size_t salt_size,
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int iterations, uint8_t* key, size_t key_size);
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#ifdef __cplusplus
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}
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#endif
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@ -0,0 +1,216 @@
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/**********************************************************************
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* Copyright (c) 2014 Pieter Wuille *
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* Distributed under the MIT software license, see the accompanying *
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* file COPYING or http://www.opensource.org/licenses/mit-license.php.*
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**********************************************************************/
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#ifndef _SECP256K1_HASH_IMPL_H_
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#define _SECP256K1_HASH_IMPL_H_
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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typedef struct {
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uint32_t s[8];
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uint32_t buf[16]; /* In big endian */
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size_t bytes;
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} sha256_state;
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static void sha256_initialize(sha256_state* hash);
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static void sha256_write(sha256_state* hash, const uint8_t* data, size_t size);
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static void sha256_finalize(sha256_state* hash, uint8_t* out32);
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typedef struct {
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sha256_state inner, outer;
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} hmac_sha256_state;
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static void hmac_sha256_initialize(hmac_sha256_state* hash, const uint8_t* key, size_t size);
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static void hmac_sha256_write(hmac_sha256_state* hash, const uint8_t* data, size_t size);
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static void hmac_sha256_finalize(hmac_sha256_state* hash, uint8_t* out32);
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#define Ch(x,y,z) ((z) ^ ((x) & ((y) ^ (z))))
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#define Maj(x,y,z) (((x) & (y)) | ((z) & ((x) | (y))))
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#define Sigma0(x) (((x) >> 2 | (x) << 30) ^ ((x) >> 13 | (x) << 19) ^ ((x) >> 22 | (x) << 10))
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#define Sigma1(x) (((x) >> 6 | (x) << 26) ^ ((x) >> 11 | (x) << 21) ^ ((x) >> 25 | (x) << 7))
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#define sigma0(x) (((x) >> 7 | (x) << 25) ^ ((x) >> 18 | (x) << 14) ^ ((x) >> 3))
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#define sigma1(x) (((x) >> 17 | (x) << 15) ^ ((x) >> 19 | (x) << 13) ^ ((x) >> 10))
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#define Round(a,b,c,d,e,f,g,h,k,w) do { \
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uint32_t t1 = (h) + Sigma1(e) + Ch((e), (f), (g)) + (k) + (w); \
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uint32_t t2 = Sigma0(a) + Maj((a), (b), (c)); \
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(d) += t1; \
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(h) = t1 + t2; \
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} while(0)
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#define BE32(p) ((((p) & 0xFF) << 24) | (((p) & 0xFF00) << 8) | (((p) & 0xFF0000) >> 8) | (((p) & 0xFF000000) >> 24))
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static void sha256_initialize(sha256_state *hash) {
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hash->s[0] = 0x6a09e667ul;
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hash->s[1] = 0xbb67ae85ul;
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hash->s[2] = 0x3c6ef372ul;
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hash->s[3] = 0xa54ff53aul;
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hash->s[4] = 0x510e527ful;
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hash->s[5] = 0x9b05688cul;
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hash->s[6] = 0x1f83d9abul;
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hash->s[7] = 0x5be0cd19ul;
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hash->bytes = 0;
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}
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/** Perform one SHA-256 transformation, processing 16 big endian 32-bit words. */
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static void sha256_transform(uint32_t* s, const uint32_t* chunk) {
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uint32_t a = s[0], b = s[1], c = s[2], d = s[3], e = s[4], f = s[5], g = s[6], h = s[7];
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uint32_t w0, w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14, w15;
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Round(a, b, c, d, e, f, g, h, 0x428a2f98, w0 = BE32(chunk[0]));
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Round(h, a, b, c, d, e, f, g, 0x71374491, w1 = BE32(chunk[1]));
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Round(g, h, a, b, c, d, e, f, 0xb5c0fbcf, w2 = BE32(chunk[2]));
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Round(f, g, h, a, b, c, d, e, 0xe9b5dba5, w3 = BE32(chunk[3]));
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Round(e, f, g, h, a, b, c, d, 0x3956c25b, w4 = BE32(chunk[4]));
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Round(d, e, f, g, h, a, b, c, 0x59f111f1, w5 = BE32(chunk[5]));
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Round(c, d, e, f, g, h, a, b, 0x923f82a4, w6 = BE32(chunk[6]));
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Round(b, c, d, e, f, g, h, a, 0xab1c5ed5, w7 = BE32(chunk[7]));
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Round(a, b, c, d, e, f, g, h, 0xd807aa98, w8 = BE32(chunk[8]));
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Round(h, a, b, c, d, e, f, g, 0x12835b01, w9 = BE32(chunk[9]));
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Round(g, h, a, b, c, d, e, f, 0x243185be, w10 = BE32(chunk[10]));
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Round(f, g, h, a, b, c, d, e, 0x550c7dc3, w11 = BE32(chunk[11]));
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Round(e, f, g, h, a, b, c, d, 0x72be5d74, w12 = BE32(chunk[12]));
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Round(d, e, f, g, h, a, b, c, 0x80deb1fe, w13 = BE32(chunk[13]));
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Round(c, d, e, f, g, h, a, b, 0x9bdc06a7, w14 = BE32(chunk[14]));
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Round(b, c, d, e, f, g, h, a, 0xc19bf174, w15 = BE32(chunk[15]));
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Round(a, b, c, d, e, f, g, h, 0xe49b69c1, w0 += sigma1(w14) + w9 + sigma0(w1));
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Round(h, a, b, c, d, e, f, g, 0xefbe4786, w1 += sigma1(w15) + w10 + sigma0(w2));
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Round(g, h, a, b, c, d, e, f, 0x0fc19dc6, w2 += sigma1(w0) + w11 + sigma0(w3));
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Round(f, g, h, a, b, c, d, e, 0x240ca1cc, w3 += sigma1(w1) + w12 + sigma0(w4));
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Round(e, f, g, h, a, b, c, d, 0x2de92c6f, w4 += sigma1(w2) + w13 + sigma0(w5));
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Round(d, e, f, g, h, a, b, c, 0x4a7484aa, w5 += sigma1(w3) + w14 + sigma0(w6));
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Round(c, d, e, f, g, h, a, b, 0x5cb0a9dc, w6 += sigma1(w4) + w15 + sigma0(w7));
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Round(b, c, d, e, f, g, h, a, 0x76f988da, w7 += sigma1(w5) + w0 + sigma0(w8));
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Round(a, b, c, d, e, f, g, h, 0x983e5152, w8 += sigma1(w6) + w1 + sigma0(w9));
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Round(h, a, b, c, d, e, f, g, 0xa831c66d, w9 += sigma1(w7) + w2 + sigma0(w10));
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Round(g, h, a, b, c, d, e, f, 0xb00327c8, w10 += sigma1(w8) + w3 + sigma0(w11));
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Round(f, g, h, a, b, c, d, e, 0xbf597fc7, w11 += sigma1(w9) + w4 + sigma0(w12));
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Round(e, f, g, h, a, b, c, d, 0xc6e00bf3, w12 += sigma1(w10) + w5 + sigma0(w13));
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Round(d, e, f, g, h, a, b, c, 0xd5a79147, w13 += sigma1(w11) + w6 + sigma0(w14));
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Round(c, d, e, f, g, h, a, b, 0x06ca6351, w14 += sigma1(w12) + w7 + sigma0(w15));
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Round(b, c, d, e, f, g, h, a, 0x14292967, w15 += sigma1(w13) + w8 + sigma0(w0));
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Round(a, b, c, d, e, f, g, h, 0x27b70a85, w0 += sigma1(w14) + w9 + sigma0(w1));
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Round(h, a, b, c, d, e, f, g, 0x2e1b2138, w1 += sigma1(w15) + w10 + sigma0(w2));
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Round(g, h, a, b, c, d, e, f, 0x4d2c6dfc, w2 += sigma1(w0) + w11 + sigma0(w3));
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Round(f, g, h, a, b, c, d, e, 0x53380d13, w3 += sigma1(w1) + w12 + sigma0(w4));
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Round(e, f, g, h, a, b, c, d, 0x650a7354, w4 += sigma1(w2) + w13 + sigma0(w5));
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Round(d, e, f, g, h, a, b, c, 0x766a0abb, w5 += sigma1(w3) + w14 + sigma0(w6));
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Round(c, d, e, f, g, h, a, b, 0x81c2c92e, w6 += sigma1(w4) + w15 + sigma0(w7));
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Round(b, c, d, e, f, g, h, a, 0x92722c85, w7 += sigma1(w5) + w0 + sigma0(w8));
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Round(a, b, c, d, e, f, g, h, 0xa2bfe8a1, w8 += sigma1(w6) + w1 + sigma0(w9));
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Round(h, a, b, c, d, e, f, g, 0xa81a664b, w9 += sigma1(w7) + w2 + sigma0(w10));
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Round(g, h, a, b, c, d, e, f, 0xc24b8b70, w10 += sigma1(w8) + w3 + sigma0(w11));
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Round(f, g, h, a, b, c, d, e, 0xc76c51a3, w11 += sigma1(w9) + w4 + sigma0(w12));
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Round(e, f, g, h, a, b, c, d, 0xd192e819, w12 += sigma1(w10) + w5 + sigma0(w13));
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Round(d, e, f, g, h, a, b, c, 0xd6990624, w13 += sigma1(w11) + w6 + sigma0(w14));
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Round(c, d, e, f, g, h, a, b, 0xf40e3585, w14 += sigma1(w12) + w7 + sigma0(w15));
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Round(b, c, d, e, f, g, h, a, 0x106aa070, w15 += sigma1(w13) + w8 + sigma0(w0));
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Round(a, b, c, d, e, f, g, h, 0x19a4c116, w0 += sigma1(w14) + w9 + sigma0(w1));
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Round(h, a, b, c, d, e, f, g, 0x1e376c08, w1 += sigma1(w15) + w10 + sigma0(w2));
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Round(g, h, a, b, c, d, e, f, 0x2748774c, w2 += sigma1(w0) + w11 + sigma0(w3));
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Round(f, g, h, a, b, c, d, e, 0x34b0bcb5, w3 += sigma1(w1) + w12 + sigma0(w4));
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Round(e, f, g, h, a, b, c, d, 0x391c0cb3, w4 += sigma1(w2) + w13 + sigma0(w5));
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Round(d, e, f, g, h, a, b, c, 0x4ed8aa4a, w5 += sigma1(w3) + w14 + sigma0(w6));
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Round(c, d, e, f, g, h, a, b, 0x5b9cca4f, w6 += sigma1(w4) + w15 + sigma0(w7));
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Round(b, c, d, e, f, g, h, a, 0x682e6ff3, w7 += sigma1(w5) + w0 + sigma0(w8));
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Round(a, b, c, d, e, f, g, h, 0x748f82ee, w8 += sigma1(w6) + w1 + sigma0(w9));
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Round(h, a, b, c, d, e, f, g, 0x78a5636f, w9 += sigma1(w7) + w2 + sigma0(w10));
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Round(g, h, a, b, c, d, e, f, 0x84c87814, w10 += sigma1(w8) + w3 + sigma0(w11));
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Round(f, g, h, a, b, c, d, e, 0x8cc70208, w11 += sigma1(w9) + w4 + sigma0(w12));
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Round(e, f, g, h, a, b, c, d, 0x90befffa, w12 += sigma1(w10) + w5 + sigma0(w13));
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Round(d, e, f, g, h, a, b, c, 0xa4506ceb, w13 += sigma1(w11) + w6 + sigma0(w14));
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Round(c, d, e, f, g, h, a, b, 0xbef9a3f7, w14 + sigma1(w12) + w7 + sigma0(w15));
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Round(b, c, d, e, f, g, h, a, 0xc67178f2, w15 + sigma1(w13) + w8 + sigma0(w0));
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s[0] += a;
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s[1] += b;
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s[2] += c;
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s[3] += d;
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s[4] += e;
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s[5] += f;
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s[6] += g;
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s[7] += h;
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}
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static void sha256_write(sha256_state *hash, const uint8_t *data, size_t len) {
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size_t bufsize = hash->bytes & 0x3F;
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hash->bytes += len;
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while (bufsize + len >= 64) {
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/* Fill the buffer, and process it. */
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memcpy(((uint8_t*)hash->buf) + bufsize, data, 64 - bufsize);
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data += 64 - bufsize;
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len -= 64 - bufsize;
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sha256_transform(hash->s, hash->buf);
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bufsize = 0;
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}
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if (len) {
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/* Fill the buffer with what remains. */
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memcpy(((uint8_t*)hash->buf) + bufsize, data, len);
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}
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}
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static void sha256_finalize(sha256_state *hash, uint8_t *out32) {
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static const uint8_t pad[64] = {0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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uint32_t sizedesc[2];
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uint32_t out[8];
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int i = 0;
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sizedesc[0] = BE32(hash->bytes >> 29);
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sizedesc[1] = BE32(hash->bytes << 3);
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sha256_write(hash, pad, 1 + ((119 - (hash->bytes % 64)) % 64));
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sha256_write(hash, (const uint8_t*)sizedesc, 8);
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for (i = 0; i < 8; i++) {
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out[i] = BE32(hash->s[i]);
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hash->s[i] = 0;
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}
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memcpy(out32, (const uint8_t*)out, 32);
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}
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static void hmac_sha256_initialize(hmac_sha256_state *hash, const uint8_t *key, size_t keylen) {
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int n;
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uint8_t rkey[64];
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if (keylen <= 64) {
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memcpy(rkey, key, keylen);
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memset(rkey + keylen, 0, 64 - keylen);
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} else {
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sha256_state sha256;
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sha256_initialize(&sha256);
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sha256_write(&sha256, key, keylen);
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sha256_finalize(&sha256, rkey);
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memset(rkey + 32, 0, 32);
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}
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sha256_initialize(&hash->outer);
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for (n = 0; n < 64; n++) {
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rkey[n] ^= 0x5c;
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}
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sha256_write(&hash->outer, rkey, 64);
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sha256_initialize(&hash->inner);
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for (n = 0; n < 64; n++) {
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rkey[n] ^= 0x5c ^ 0x36;
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}
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sha256_write(&hash->inner, rkey, 64);
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memset(rkey, 0, 64);
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}
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static void hmac_sha256_write(hmac_sha256_state *hash, const uint8_t *data, size_t size) {
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sha256_write(&hash->inner, data, size);
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}
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static void hmac_sha256_finalize(hmac_sha256_state *hash, uint8_t *out32) {
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uint8_t temp[32];
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sha256_finalize(&hash->inner, temp);
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sha256_write(&hash->outer, temp, 32);
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memset(temp, 0, 32);
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sha256_finalize(&hash->outer, out32);
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}
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#endif
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