mirror of https://github.com/cryb-to/cryb-to.git
320 lines
9.7 KiB
C
320 lines
9.7 KiB
C
/*
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* Copyright (c) 2006-2007 Christophe Devine
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* The SHA-512 Secure Hash Standard was published by NIST in 2002.
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*
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* http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
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*/
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#include "cryb/impl.h"
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#include <stdint.h>
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#include <string.h>
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#include <cryb/sha512.h>
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/*
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* 64-bit integer manipulation macros (big endian)
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*/
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#ifndef GET_UINT64_BE
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#define GET_UINT64_BE(n,b,i) \
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do { \
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(n) = ( (uint64_t) (b)[(i) ] << 56 ) \
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| ( (uint64_t) (b)[(i) + 1] << 48 ) \
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| ( (uint64_t) (b)[(i) + 2] << 40 ) \
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| ( (uint64_t) (b)[(i) + 3] << 32 ) \
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| ( (uint64_t) (b)[(i) + 4] << 24 ) \
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| ( (uint64_t) (b)[(i) + 5] << 16 ) \
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| ( (uint64_t) (b)[(i) + 6] << 8 ) \
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| ( (uint64_t) (b)[(i) + 7] ); \
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} while (0)
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#endif
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#ifndef PUT_UINT64_BE
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#define PUT_UINT64_BE(n,b,i) \
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do { \
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(b)[(i) ] = (uint8_t) ( (n) >> 56 ); \
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(b)[(i) + 1] = (uint8_t) ( (n) >> 48 ); \
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(b)[(i) + 2] = (uint8_t) ( (n) >> 40 ); \
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(b)[(i) + 3] = (uint8_t) ( (n) >> 32 ); \
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(b)[(i) + 4] = (uint8_t) ( (n) >> 24 ); \
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(b)[(i) + 5] = (uint8_t) ( (n) >> 16 ); \
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(b)[(i) + 6] = (uint8_t) ( (n) >> 8 ); \
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(b)[(i) + 7] = (uint8_t) ( (n) ); \
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} while (0)
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#endif
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/* XXX */
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#define UL64(x) x##ULL
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/*
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* Round constants
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*/
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static const uint64_t K[80] =
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{
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UL64(0x428A2F98D728AE22), UL64(0x7137449123EF65CD),
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UL64(0xB5C0FBCFEC4D3B2F), UL64(0xE9B5DBA58189DBBC),
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UL64(0x3956C25BF348B538), UL64(0x59F111F1B605D019),
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UL64(0x923F82A4AF194F9B), UL64(0xAB1C5ED5DA6D8118),
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UL64(0xD807AA98A3030242), UL64(0x12835B0145706FBE),
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UL64(0x243185BE4EE4B28C), UL64(0x550C7DC3D5FFB4E2),
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UL64(0x72BE5D74F27B896F), UL64(0x80DEB1FE3B1696B1),
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UL64(0x9BDC06A725C71235), UL64(0xC19BF174CF692694),
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UL64(0xE49B69C19EF14AD2), UL64(0xEFBE4786384F25E3),
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UL64(0x0FC19DC68B8CD5B5), UL64(0x240CA1CC77AC9C65),
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UL64(0x2DE92C6F592B0275), UL64(0x4A7484AA6EA6E483),
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UL64(0x5CB0A9DCBD41FBD4), UL64(0x76F988DA831153B5),
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UL64(0x983E5152EE66DFAB), UL64(0xA831C66D2DB43210),
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UL64(0xB00327C898FB213F), UL64(0xBF597FC7BEEF0EE4),
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UL64(0xC6E00BF33DA88FC2), UL64(0xD5A79147930AA725),
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UL64(0x06CA6351E003826F), UL64(0x142929670A0E6E70),
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UL64(0x27B70A8546D22FFC), UL64(0x2E1B21385C26C926),
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UL64(0x4D2C6DFC5AC42AED), UL64(0x53380D139D95B3DF),
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UL64(0x650A73548BAF63DE), UL64(0x766A0ABB3C77B2A8),
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UL64(0x81C2C92E47EDAEE6), UL64(0x92722C851482353B),
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UL64(0xA2BFE8A14CF10364), UL64(0xA81A664BBC423001),
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UL64(0xC24B8B70D0F89791), UL64(0xC76C51A30654BE30),
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UL64(0xD192E819D6EF5218), UL64(0xD69906245565A910),
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UL64(0xF40E35855771202A), UL64(0x106AA07032BBD1B8),
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UL64(0x19A4C116B8D2D0C8), UL64(0x1E376C085141AB53),
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UL64(0x2748774CDF8EEB99), UL64(0x34B0BCB5E19B48A8),
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UL64(0x391C0CB3C5C95A63), UL64(0x4ED8AA4AE3418ACB),
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UL64(0x5B9CCA4F7763E373), UL64(0x682E6FF3D6B2B8A3),
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UL64(0x748F82EE5DEFB2FC), UL64(0x78A5636F43172F60),
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UL64(0x84C87814A1F0AB72), UL64(0x8CC702081A6439EC),
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UL64(0x90BEFFFA23631E28), UL64(0xA4506CEBDE82BDE9),
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UL64(0xBEF9A3F7B2C67915), UL64(0xC67178F2E372532B),
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UL64(0xCA273ECEEA26619C), UL64(0xD186B8C721C0C207),
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UL64(0xEADA7DD6CDE0EB1E), UL64(0xF57D4F7FEE6ED178),
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UL64(0x06F067AA72176FBA), UL64(0x0A637DC5A2C898A6),
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UL64(0x113F9804BEF90DAE), UL64(0x1B710B35131C471B),
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UL64(0x28DB77F523047D84), UL64(0x32CAAB7B40C72493),
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UL64(0x3C9EBE0A15C9BEBC), UL64(0x431D67C49C100D4C),
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UL64(0x4CC5D4BECB3E42B6), UL64(0x597F299CFC657E2A),
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UL64(0x5FCB6FAB3AD6FAEC), UL64(0x6C44198C4A475817)
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};
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/*
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* SHA-512 context setup
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*/
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void sha512_init( sha512_ctx *ctx )
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{
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ctx->total[0] = 0;
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ctx->total[1] = 0;
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ctx->state[0] = UL64(0x6A09E667F3BCC908);
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ctx->state[1] = UL64(0xBB67AE8584CAA73B);
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ctx->state[2] = UL64(0x3C6EF372FE94F82B);
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ctx->state[3] = UL64(0xA54FF53A5F1D36F1);
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ctx->state[4] = UL64(0x510E527FADE682D1);
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ctx->state[5] = UL64(0x9B05688C2B3E6C1F);
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ctx->state[6] = UL64(0x1F83D9ABFB41BD6B);
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ctx->state[7] = UL64(0x5BE0CD19137E2179);
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}
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static void sha512_process( sha512_ctx *ctx, const uint8_t *data )
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{
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int i;
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uint64_t temp1, temp2, W[80];
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uint64_t A, B, C, D, E, F, G, H;
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#define SHR(x,n) (x >> n)
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#define ROTR(x,n) (SHR(x,n) | (x << (64 - n)))
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#define S0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHR(x, 7))
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#define S1(x) (ROTR(x,19) ^ ROTR(x,61) ^ SHR(x, 6))
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#define S2(x) (ROTR(x,28) ^ ROTR(x,34) ^ ROTR(x,39))
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#define S3(x) (ROTR(x,14) ^ ROTR(x,18) ^ ROTR(x,41))
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#define F0(x,y,z) ((x & y) | (z & (x | y)))
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#define F1(x,y,z) (z ^ (x & (y ^ z)))
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#define P(a,b,c,d,e,f,g,h,x,K) \
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{ \
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temp1 = h + S3(e) + F1(e,f,g) + K + x; \
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temp2 = S2(a) + F0(a,b,c); \
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d += temp1; h = temp1 + temp2; \
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}
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for( i = 0; i < 16; i++ )
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{
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GET_UINT64_BE( W[i], data, i << 3 );
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}
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for( ; i < 80; i++ )
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{
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W[i] = S1(W[i - 2]) + W[i - 7] +
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S0(W[i - 15]) + W[i - 16];
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}
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A = ctx->state[0];
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B = ctx->state[1];
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C = ctx->state[2];
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D = ctx->state[3];
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E = ctx->state[4];
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F = ctx->state[5];
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G = ctx->state[6];
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H = ctx->state[7];
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i = 0;
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do
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{
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P( A, B, C, D, E, F, G, H, W[i], K[i] ); i++;
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P( H, A, B, C, D, E, F, G, W[i], K[i] ); i++;
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P( G, H, A, B, C, D, E, F, W[i], K[i] ); i++;
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P( F, G, H, A, B, C, D, E, W[i], K[i] ); i++;
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P( E, F, G, H, A, B, C, D, W[i], K[i] ); i++;
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P( D, E, F, G, H, A, B, C, W[i], K[i] ); i++;
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P( C, D, E, F, G, H, A, B, W[i], K[i] ); i++;
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P( B, C, D, E, F, G, H, A, W[i], K[i] ); i++;
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}
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while( i < 80 );
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ctx->state[0] += A;
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ctx->state[1] += B;
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ctx->state[2] += C;
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ctx->state[3] += D;
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ctx->state[4] += E;
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ctx->state[5] += F;
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ctx->state[6] += G;
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ctx->state[7] += H;
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}
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/*
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* SHA-512 process buffer
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*/
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void sha512_update( sha512_ctx *ctx, const void *input, int ilen )
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{
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int fill;
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uint64_t left;
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if( ilen <= 0 )
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return;
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left = ctx->total[0] & 0x7F;
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fill = (int)( 128 - left );
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ctx->total[0] += ilen;
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if( ctx->total[0] < (uint64_t) ilen )
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ctx->total[1]++;
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if( left && ilen >= fill )
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{
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memcpy( (ctx->buffer + left), input, fill );
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sha512_process( ctx, ctx->buffer );
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input += fill;
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ilen -= fill;
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left = 0;
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}
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while( ilen >= 128 )
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{
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sha512_process( ctx, input );
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input += 128;
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ilen -= 128;
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}
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if( ilen > 0 )
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{
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memcpy( (ctx->buffer + left), input, ilen );
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}
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}
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static const uint8_t sha512_padding[128] =
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{
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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/*
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* SHA-512 final digest
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*/
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void sha512_final( sha512_ctx *ctx, uint8_t *output )
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{
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int last, padn;
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uint64_t high, low;
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uint8_t msglen[16];
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high = ( ctx->total[0] >> 61 )
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| ( ctx->total[1] << 3 );
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low = ( ctx->total[0] << 3 );
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PUT_UINT64_BE( high, msglen, 0 );
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PUT_UINT64_BE( low, msglen, 8 );
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last = (int)( ctx->total[0] & 0x7F );
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padn = ( last < 112 ) ? ( 112 - last ) : ( 240 - last );
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sha512_update( ctx, (const uint8_t *) sha512_padding, padn );
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sha512_update( ctx, msglen, 16 );
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PUT_UINT64_BE( ctx->state[0], output, 0 );
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PUT_UINT64_BE( ctx->state[1], output, 8 );
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PUT_UINT64_BE( ctx->state[2], output, 16 );
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PUT_UINT64_BE( ctx->state[3], output, 24 );
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PUT_UINT64_BE( ctx->state[4], output, 32 );
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PUT_UINT64_BE( ctx->state[5], output, 40 );
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PUT_UINT64_BE( ctx->state[6], output, 48 );
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PUT_UINT64_BE( ctx->state[7], output, 56 );
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}
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/*
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* output = SHA-512( input buffer )
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*/
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void sha512_complete( const void *input, int ilen, uint8_t *output )
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{
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sha512_ctx ctx;
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sha512_init( &ctx );
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sha512_update( &ctx, input, ilen );
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sha512_final( &ctx, output );
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memset( &ctx, 0, sizeof( sha512_ctx ) );
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}
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digest_algorithm sha512_digest = {
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.name = "sha512",
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.contextlen = sizeof(sha512_ctx),
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.blocklen = SHA512_BLOCK_LEN,
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.digestlen = SHA512_DIGEST_LEN,
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.init = (digest_init_func)sha512_init,
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.update = (digest_update_func)sha512_update,
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.final = (digest_final_func)sha512_final,
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.complete = (digest_complete_func)sha512_complete,
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};
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