343 lines
10 KiB
C
Executable File
343 lines
10 KiB
C
Executable File
/*
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------------------------------------------------------------------------------
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This software is available under 2 licenses -- choose whichever you prefer.
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------------------------------------------------------------------------------
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ALTERNATIVE A - Public Domain (www.unlicense.org)
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This is free and unencumbered software released into the public domain.
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Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
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software, either in source code form or as a compiled binary, for any purpose,
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commercial or non-commercial, and by any means.
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In jurisdictions that recognize copyright laws, the author or authors of this
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software dedicate any and all copyright interest in the software to the public
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domain. We make this dedication for the benefit of the public at large and to
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the detriment of our heirs and successors. We intend this dedication to be an
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overt act of relinquishment in perpetuity of all present and future rights to
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this software under copyright law.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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------------------------------------------------------------------------------
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ALTERNATIVE B - MIT License
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Copyright (c) 2019 monolifed
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do
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so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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------------------------------------------------------------------------------
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*/
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#include "stdint.h"
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#include <string.h>
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#include "pbkdf2_sha256.h"
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//#define ROR(n,k) ((n >> k) | (n << (32 - k)))
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static uint32_t ror(uint32_t n, uint32_t k)
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{
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return (n >> k) | (n << (32 - k));
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}
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#define ROR(n,k) ror(n,k)
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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 S0(x) (ROR(x, 2) ^ ROR(x,13) ^ ROR(x,22))
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#define S1(x) (ROR(x, 6) ^ ROR(x,11) ^ ROR(x,25))
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#define R0(x) (ROR(x, 7) ^ ROR(x,18) ^ (x>>3))
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#define R1(x) (ROR(x,17) ^ ROR(x,19) ^ (x>>10))
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static const uint32_t K[64] =
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{
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
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};
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static void sha256_transform(SHA256_CTX *s, const uint8_t *buf)
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{
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uint32_t t1, t2, a, b, c, d, e, f, g, h, m[64];
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uint32_t i, j;
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for (i = 0, j = 0; i < 16; i++, j += 4)
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{
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m[i] = (uint32_t) buf[j] << 24 | (uint32_t) buf[j + 1] << 16 |
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(uint32_t) buf[j + 2] << 8 | (uint32_t) buf[j + 3];
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}
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for (; i < 64; i++)
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{
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m[i] = R1(m[i - 2]) + m[i - 7] + R0(m[i - 15]) + m[i - 16];
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}
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a = s->h[0];
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b = s->h[1];
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c = s->h[2];
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d = s->h[3];
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e = s->h[4];
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f = s->h[5];
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g = s->h[6];
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h = s->h[7];
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for (i = 0; i < 64; i++)
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{
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t1 = h + S1(e) + CH(e, f, g) + K[i] + m[i];
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t2 = S0(a) + MAJ(a, b, c);
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h = g;
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g = f;
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f = e;
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e = d + t1;
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d = c;
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c = b;
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b = a;
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a = t1 + t2;
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}
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s->h[0] += a;
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s->h[1] += b;
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s->h[2] += c;
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s->h[3] += d;
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s->h[4] += e;
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s->h[5] += f;
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s->h[6] += g;
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s->h[7] += h;
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}
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PBKDF2_SHA256_DEF void sha256_init(SHA256_CTX *s)
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{
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s->len = 0;
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s->h[0] = 0x6a09e667;
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s->h[1] = 0xbb67ae85;
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s->h[2] = 0x3c6ef372;
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s->h[3] = 0xa54ff53a;
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s->h[4] = 0x510e527f;
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s->h[5] = 0x9b05688c;
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s->h[6] = 0x1f83d9ab;
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s->h[7] = 0x5be0cd19;
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}
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PBKDF2_SHA256_DEF void sha256_final(SHA256_CTX *s, uint8_t *md)
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{
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uint32_t r = s->len % SHA256_BLOCKLEN;
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int i;
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//pad
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s->buf[r++] = 0x80;
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if (r > 56)
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{
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memset(s->buf + r, 0, SHA256_BLOCKLEN - r);
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r = 0;
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sha256_transform(s, s->buf);
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}
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memset(s->buf + r, 0, 56 - r);
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s->len *= 8;
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s->buf[56] = s->len >> 56;
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s->buf[57] = s->len >> 48;
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s->buf[58] = s->len >> 40;
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s->buf[59] = s->len >> 32;
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s->buf[60] = s->len >> 24;
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s->buf[61] = s->len >> 16;
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s->buf[62] = s->len >> 8;
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s->buf[63] = s->len;
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sha256_transform(s, s->buf);
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for (i = 0; i < SHA256_DIGESTINT; i++)
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{
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md[4 * i ] = s->h[i] >> 24;
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md[4 * i + 1] = s->h[i] >> 16;
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md[4 * i + 2] = s->h[i] >> 8;
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md[4 * i + 3] = s->h[i];
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}
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sha256_init(s);
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}
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PBKDF2_SHA256_DEF void sha256_update(SHA256_CTX *s, const uint8_t *m, uint32_t len)
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{
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const uint8_t *p = m;
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uint32_t r = s->len % SHA256_BLOCKLEN;
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s->len += len;
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if (r)
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{
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if (len + r < SHA256_BLOCKLEN)
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{
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memcpy(s->buf + r, p, len);
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return;
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}
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memcpy(s->buf + r, p, SHA256_BLOCKLEN - r);
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len -= SHA256_BLOCKLEN - r;
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p += SHA256_BLOCKLEN - r;
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sha256_transform(s, s->buf);
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}
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for (; len >= SHA256_BLOCKLEN; len -= SHA256_BLOCKLEN, p += SHA256_BLOCKLEN)
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{
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sha256_transform(s, p);
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}
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memcpy(s->buf, p, len);
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}
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#define INNER_PAD '\x36'
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#define OUTER_PAD '\x5c'
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PBKDF2_SHA256_DEF void hmac_sha256_init(HMAC_SHA256_CTX *hmac, const uint8_t *key, uint32_t keylen)
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{
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SHA256_CTX *sha = &hmac->sha;
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uint32_t i;
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if (keylen <= SHA256_BLOCKLEN)
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{
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memcpy(hmac->buf, key, keylen);
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memset(hmac->buf + keylen, '\0', SHA256_BLOCKLEN - keylen);
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}
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else
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{
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sha256_init(sha);
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sha256_update(sha, key, keylen);
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sha256_final(sha, hmac->buf);
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memset(hmac->buf + SHA256_DIGESTLEN, '\0', SHA256_BLOCKLEN - SHA256_DIGESTLEN);
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}
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for (i = 0; i < SHA256_BLOCKLEN; i++)
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{
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hmac->buf[ i ] = hmac->buf[ i ] ^ OUTER_PAD;
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}
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sha256_init(sha);
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sha256_update(sha, hmac->buf, SHA256_BLOCKLEN);
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// copy outer state
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memcpy(hmac->h_outer, sha->h, SHA256_DIGESTLEN);
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for (i = 0; i < SHA256_BLOCKLEN; i++)
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{
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hmac->buf[ i ] = (hmac->buf[ i ] ^ OUTER_PAD) ^ INNER_PAD;
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}
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sha256_init(sha);
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sha256_update(sha, hmac->buf, SHA256_BLOCKLEN);
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// copy inner state
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memcpy(hmac->h_inner, sha->h, SHA256_DIGESTLEN);
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}
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PBKDF2_SHA256_DEF void hmac_sha256_update(HMAC_SHA256_CTX *hmac, const uint8_t *m, uint32_t mlen)
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{
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sha256_update(&hmac->sha, m, mlen);
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}
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PBKDF2_SHA256_DEF void hmac_sha256_final(HMAC_SHA256_CTX *hmac, uint8_t *md)
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{
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SHA256_CTX *sha = &hmac->sha;
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sha256_final(sha, md);
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// reset sha to outer state
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memcpy(sha->h, hmac->h_outer, SHA256_DIGESTLEN);
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sha->len = SHA256_BLOCKLEN;
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sha256_update(sha, md, SHA256_DIGESTLEN);
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sha256_final(sha, md); // md = D(outer || D(inner || msg))
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// reset sha to inner state -> reset hmac
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memcpy(sha->h, hmac->h_inner, SHA256_DIGESTLEN);
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sha->len = SHA256_BLOCKLEN;
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}
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PBKDF2_SHA256_DEF void pbkdf2_sha256(HMAC_SHA256_CTX *hmac,
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const uint8_t *key, uint32_t keylen, const uint8_t *salt, uint32_t saltlen, uint32_t rounds,
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uint8_t *dk, uint32_t dklen)
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{
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uint8_t *U;
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uint8_t *T;
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uint8_t count[4];
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uint32_t i, j, k;
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uint32_t len;
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uint32_t hlen = SHA256_DIGESTLEN;
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uint32_t l = dklen / hlen + ((dklen % hlen) ? 1 : 0);
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uint32_t r = dklen - (l - 1) * hlen;
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hmac_sha256_init(hmac, key, keylen);
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U = hmac->buf;
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T = dk;
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len = hlen;
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for (i = 1; i <= l; i++)
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{
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if (i == l) { len = r; }
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count[0] = (i >> 24) & 0xFF;
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count[1] = (i >> 16) & 0xFF;
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count[2] = (i >> 8) & 0xFF;
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count[3] = (i) & 0xFF;
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hmac_sha256_update(hmac, salt, saltlen);
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hmac_sha256_update(hmac, count, 4);
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hmac_sha256_final(hmac, U);
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memcpy(T, U, len);
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for (j = 1; j < rounds; j++)
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{
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hmac_sha256_update(hmac, U, hlen);
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hmac_sha256_final(hmac, U);
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for (k = 0; k < len; k++)
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{
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T[k] ^= U[k];
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}
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}
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T += len;
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}
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}
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void compute_hmac_ex(unsigned char* dest, const uint8_t *key, uint32_t klen, const uint8_t *msg, uint32_t mlen)
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{
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uint8_t md[SHA256_DIGESTLEN] = {0};
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HMAC_SHA256_CTX hmac = {0};
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hmac_sha256_init(&hmac, key, klen);
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hmac_sha256_update(&hmac, msg, mlen);
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hmac_sha256_final(&hmac, md);
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memcpy(dest, md, SHA256_DIGESTLEN);
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}
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//#endif // PBKDF2_SHA256_IMPLEMENTATION
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/*
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// ʹ<>÷<EFBFBD><C3B7><EFBFBD>ʾ<EFBFBD><CABE>
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void compute_sha_ex(unsigned char* dest, const uint8_t *msg, uint32_t mlen)
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{
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uint8_t md[SHA256_DIGESTLEN] = {0};
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SHA256_CTX sha;
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sha256_init(&sha);
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sha256_update(&sha, msg, mlen);
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sha256_final(&sha, md);
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memcpy(dest, md, SHA256_DIGESTLEN);
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}
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void compute_hmac_ex(unsigned char* dest, const uint8_t *key, uint32_t klen, const uint8_t *msg, uint32_t mlen)
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{
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uint8_t md[SHA256_DIGESTLEN] = {0};
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HMAC_SHA256_CTX hmac;
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hmac_sha256_init(&hmac, key, klen);
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hmac_sha256_update(&hmac, msg, mlen);
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hmac_sha256_final(&hmac, md);
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memcpy(dest, md, SHA256_DIGESTLEN);
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}
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unsigned char dest[32] = {0};
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string key;
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string msg;
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compute_sha_ex(dest, (const uint8_t *)msg.c_str(), msg.length());
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compute_hmac_ex(dest, (const uint8_t *)key.c_str(), key.length(), (const uint8_t *)msg.c_str(), msg.length());
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*/
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