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507 lines
12 KiB
C
507 lines
12 KiB
C
/*
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BLAKE2 reference source code package - reference C implementations
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Written in 2012 by Samuel Neves <sneves@dei.uc.pt>
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To the extent possible under law, the author(s) have dedicated all copyright
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and related and neighboring rights to this software to the public domain
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worldwide. This software is distributed without any warranty.
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You should have received a copy of the CC0 Public Domain Dedication along with
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this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
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*/
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/* blake2s.c
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*
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* Copyright (C) 2006-2024 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <wolfssl/wolfcrypt/settings.h>
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#ifdef HAVE_BLAKE2S
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#include <wolfssl/wolfcrypt/blake2.h>
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#include <wolfssl/wolfcrypt/blake2-impl.h>
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#include <wolfssl/wolfcrypt/error-crypt.h>
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static const word32 blake2s_IV[8] =
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{
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0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
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0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
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};
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static const byte blake2s_sigma[10][16] =
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{
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{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } ,
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{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 } ,
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{ 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 } ,
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{ 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 } ,
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{ 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 } ,
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{ 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 } ,
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{ 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 } ,
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{ 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 } ,
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{ 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 } ,
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{ 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13 , 0 }
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};
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static WC_INLINE int blake2s_set_lastnode( blake2s_state *S )
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{
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S->f[1] = ~0U;
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return 0;
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}
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/* Some helper functions, not necessarily useful */
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static WC_INLINE int blake2s_set_lastblock( blake2s_state *S )
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{
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if( S->last_node ) blake2s_set_lastnode( S );
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S->f[0] = ~0U;
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return 0;
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}
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static WC_INLINE int blake2s_increment_counter( blake2s_state *S, const word32
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inc )
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{
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S->t[0] += inc;
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S->t[1] += ( S->t[0] < inc );
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return 0;
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}
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static WC_INLINE int blake2s_init0( blake2s_state *S )
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{
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int i;
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XMEMSET( S, 0, sizeof( blake2s_state ) );
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for( i = 0; i < 8; ++i ) S->h[i] = blake2s_IV[i];
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return 0;
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}
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/* init xors IV with input parameter block */
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int blake2s_init_param( blake2s_state *S, const blake2s_param *P )
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{
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word32 i;
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byte *p ;
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blake2s_init0( S );
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p = ( byte * )( P );
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/* IV XOR ParamBlock */
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for( i = 0; i < 8; ++i )
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S->h[i] ^= load32( p + sizeof( S->h[i] ) * i );
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return 0;
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}
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int blake2s_init( blake2s_state *S, const byte outlen )
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{
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#ifdef WOLFSSL_BLAKE2S_INIT_EACH_FIELD
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blake2s_param P[1];
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#else
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volatile blake2s_param P[1];
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#endif
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if ( ( !outlen ) || ( outlen > BLAKE2S_OUTBYTES ) ) return BAD_FUNC_ARG;
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#ifdef WOLFSSL_BLAKE2S_INIT_EACH_FIELD
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P->digest_length = outlen;
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P->key_length = 0;
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P->fanout = 1;
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P->depth = 1;
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store32( &P->leaf_length, 0 );
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store32( &P->node_offset, 0 );
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P->node_depth = 0;
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P->inner_length = 0;
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XMEMSET( P->salt, 0, sizeof( P->salt ) );
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XMEMSET( P->personal, 0, sizeof( P->personal ) );
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#else
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XMEMSET( (blake2s_param *)P, 0, sizeof( *P ) );
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P->digest_length = outlen;
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P->fanout = 1;
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P->depth = 1;
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#endif
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return blake2s_init_param( S, (blake2s_param *)P );
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}
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int blake2s_init_key( blake2s_state *S, const byte outlen, const void *key,
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const byte keylen )
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{
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int ret = 0;
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#ifdef WOLFSSL_BLAKE2S_INIT_EACH_FIELD
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blake2s_param P[1];
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#else
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volatile blake2s_param P[1];
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#endif
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if ( ( !outlen ) || ( outlen > BLAKE2S_OUTBYTES ) ) return BAD_FUNC_ARG;
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if ( !key || !keylen || keylen > BLAKE2S_KEYBYTES ) return BAD_FUNC_ARG;
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#ifdef WOLFSSL_BLAKE2S_INIT_EACH_FIELD
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P->digest_length = outlen;
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P->key_length = keylen;
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P->fanout = 1;
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P->depth = 1;
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store32( &P->leaf_length, 0 );
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store64( &P->node_offset, 0 );
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P->node_depth = 0;
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P->inner_length = 0;
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XMEMSET( P->salt, 0, sizeof( P->salt ) );
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XMEMSET( P->personal, 0, sizeof( P->personal ) );
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#else
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XMEMSET( (blake2s_param *)P, 0, sizeof( *P ) );
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P->digest_length = outlen;
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P->key_length = keylen;
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P->fanout = 1;
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P->depth = 1;
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#endif
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ret = blake2s_init_param( S, (blake2s_param *)P );
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if (ret < 0)
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return ret;
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{
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#ifdef WOLFSSL_SMALL_STACK
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byte* block;
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block = (byte*)XMALLOC(BLAKE2S_BLOCKBYTES, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if ( block == NULL ) return MEMORY_E;
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#else
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byte block[BLAKE2S_BLOCKBYTES];
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#endif
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XMEMSET( block, 0, BLAKE2S_BLOCKBYTES );
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XMEMCPY( block, key, keylen );
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ret = blake2s_update( S, block, BLAKE2S_BLOCKBYTES );
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secure_zero_memory( block, BLAKE2S_BLOCKBYTES ); /* Burn the key from */
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/* memory */
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(block, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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}
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return ret;
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}
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static WC_INLINE int blake2s_compress(
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blake2s_state *S,
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const byte block[BLAKE2S_BLOCKBYTES],
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word32* m,
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word32* v)
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{
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word32 i;
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for( i = 0; i < 16; ++i )
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m[i] = load32( block + i * sizeof( m[i] ) );
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for( i = 0; i < 8; ++i )
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v[i] = S->h[i];
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v[ 8] = blake2s_IV[0];
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v[ 9] = blake2s_IV[1];
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v[10] = blake2s_IV[2];
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v[11] = blake2s_IV[3];
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v[12] = S->t[0] ^ blake2s_IV[4];
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v[13] = S->t[1] ^ blake2s_IV[5];
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v[14] = S->f[0] ^ blake2s_IV[6];
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v[15] = S->f[1] ^ blake2s_IV[7];
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#define G(r,i,a,b,c,d) \
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do { \
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(a) = (a) + (b) + m[blake2s_sigma[r][2*(i)+0]]; \
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(d) = rotr32((d) ^ (a), 16); \
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(c) = (c) + (d); \
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(b) = rotr32((b) ^ (c), 12); \
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(a) = (a) + (b) + m[blake2s_sigma[r][2*(i)+1]]; \
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(d) = rotr32((d) ^ (a), 8); \
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(c) = (c) + (d); \
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(b) = rotr32((b) ^ (c), 7); \
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} while(0)
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#define ROUND(r) \
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do { \
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G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
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G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
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G(r,2,v[ 2],v[ 6],v[10],v[14]); \
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G(r,3,v[ 3],v[ 7],v[11],v[15]); \
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G(r,4,v[ 0],v[ 5],v[10],v[15]); \
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G(r,5,v[ 1],v[ 6],v[11],v[12]); \
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G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
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G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
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} while(0)
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ROUND( 0 );
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ROUND( 1 );
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ROUND( 2 );
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ROUND( 3 );
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ROUND( 4 );
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ROUND( 5 );
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ROUND( 6 );
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ROUND( 7 );
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ROUND( 8 );
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ROUND( 9 );
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for( i = 0; i < 8; ++i )
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S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
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#undef G
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#undef ROUND
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return 0;
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}
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/* inlen now in bytes */
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int blake2s_update( blake2s_state *S, const byte *in, word32 inlen )
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{
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int ret = 0;
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#ifdef WOLFSSL_SMALL_STACK
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word32* m;
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word32* v;
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m = (word32*)XMALLOC(sizeof(word32) * 32, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if ( m == NULL ) return MEMORY_E;
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v = &m[16];
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#else
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word32 m[16];
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word32 v[16];
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#endif
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while( inlen > 0 )
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{
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word32 left = S->buflen;
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word32 fill = 2 * BLAKE2S_BLOCKBYTES - left;
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if( inlen > fill )
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{
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XMEMCPY( S->buf + left, in, (wolfssl_word)fill ); /* Fill buffer */
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S->buflen += fill;
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blake2s_increment_counter( S, BLAKE2S_BLOCKBYTES );
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{
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ret= blake2s_compress( S, S->buf, m, v );
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if (ret < 0) break;
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}
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XMEMCPY( S->buf, S->buf + BLAKE2S_BLOCKBYTES, BLAKE2S_BLOCKBYTES );
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/* Shift buffer left */
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S->buflen -= BLAKE2S_BLOCKBYTES;
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in += fill;
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inlen -= fill;
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}
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else /* inlen <= fill */
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{
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XMEMCPY( S->buf + left, in, (wolfssl_word)inlen );
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S->buflen += inlen; /* Be lazy, do not compress */
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inlen = 0;
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}
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}
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(m, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return ret;
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}
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/* Is this correct? */
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int blake2s_final( blake2s_state *S, byte *out, byte outlen )
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{
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int ret = 0;
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word32 i;
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byte buffer[BLAKE2S_BLOCKBYTES];
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#ifdef WOLFSSL_SMALL_STACK
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word32* m;
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word32* v;
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m = (word32*)XMALLOC(sizeof(word32) * 32, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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if ( m == NULL ) return MEMORY_E;
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v = &m[16];
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#else
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word32 m[16];
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word32 v[16];
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#endif
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if( S->buflen > BLAKE2S_BLOCKBYTES )
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{
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blake2s_increment_counter( S, BLAKE2S_BLOCKBYTES );
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{
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ret = blake2s_compress( S, S->buf, m, v );
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if (ret < 0) goto out;
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}
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S->buflen -= BLAKE2S_BLOCKBYTES;
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XMEMCPY( S->buf, S->buf + BLAKE2S_BLOCKBYTES, (wolfssl_word)S->buflen );
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}
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blake2s_increment_counter( S, S->buflen );
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blake2s_set_lastblock( S );
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XMEMSET( S->buf + S->buflen, 0, (wolfssl_word)(2 * BLAKE2S_BLOCKBYTES - S->buflen) );
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/* Padding */
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{
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ret = blake2s_compress( S, S->buf, m, v );
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if (ret < 0) goto out;
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}
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for( i = 0; i < 8; ++i ) /* Output full hash to temp buffer */
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store64( buffer + sizeof( S->h[i] ) * i, S->h[i] );
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XMEMCPY( out, buffer, outlen );
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out:
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#ifdef WOLFSSL_SMALL_STACK
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XFREE(m, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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#endif
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return ret;
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}
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/* inlen, at least, should be word32. Others can be size_t. */
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int blake2s( byte *out, const void *in, const void *key, const byte outlen,
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const word32 inlen, byte keylen )
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{
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blake2s_state S[1];
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/* Verify parameters */
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if ( NULL == in ) return BAD_FUNC_ARG;
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if ( NULL == out ) return BAD_FUNC_ARG;
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if( NULL == key ) keylen = 0;
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if( keylen > 0 )
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{
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int ret = blake2s_init_key( S, outlen, key, keylen );
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if (ret < 0) return ret;
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}
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else
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{
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int ret = blake2s_init( S, outlen );
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if (ret < 0) return ret;
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}
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{
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int ret = blake2s_update( S, ( byte * )in, inlen );
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if (ret < 0) return ret;
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}
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return blake2s_final( S, out, outlen );
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}
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#if defined(BLAKE2S_SELFTEST)
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#include <string.h>
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#include "blake2-kat.h"
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int main( int argc, char **argv )
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{
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byte key[BLAKE2S_KEYBYTES];
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byte buf[KAT_LENGTH];
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for( word32 i = 0; i < BLAKE2S_KEYBYTES; ++i )
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key[i] = ( byte )i;
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for( word32 i = 0; i < KAT_LENGTH; ++i )
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buf[i] = ( byte )i;
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for( word32 i = 0; i < KAT_LENGTH; ++i )
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{
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byte hash[BLAKE2S_OUTBYTES];
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if ( blake2s( hash, buf, key, BLAKE2S_OUTBYTES, i, BLAKE2S_KEYBYTES ) < 0 )
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{
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puts( "error" );
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return -1;
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}
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if( 0 != XMEMCMP( hash, blake2s_keyed_kat[i], BLAKE2S_OUTBYTES ) )
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{
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puts( "error" );
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return -1;
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}
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}
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puts( "ok" );
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return 0;
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}
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#endif
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/* wolfCrypt API */
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/* Init Blake2s digest, track size in case final doesn't want to "remember" */
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int wc_InitBlake2s(Blake2s* b2s, word32 digestSz)
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{
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if (b2s == NULL){
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return BAD_FUNC_ARG;
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}
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b2s->digestSz = digestSz;
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return blake2s_init(b2s->S, (byte)digestSz);
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}
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/* Init Blake2s digest with key, track size in case final doesn't want to "remember" */
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int wc_InitBlake2s_WithKey(Blake2s* b2s, word32 digestSz, const byte *key, word32 keylen)
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{
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if (b2s == NULL){
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return BAD_FUNC_ARG;
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}
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b2s->digestSz = digestSz;
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if (keylen >= 256)
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return BAD_FUNC_ARG;
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if (key)
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return blake2s_init_key(b2s->S, (byte)digestSz, key, (byte)keylen);
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else
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return blake2s_init(b2s->S, (byte)digestSz);
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}
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/* Blake2s Update */
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int wc_Blake2sUpdate(Blake2s* b2s, const byte* data, word32 sz)
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{
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return blake2s_update(b2s->S, data, sz);
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}
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/* Blake2s Final, if pass in zero size we use init digestSz */
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int wc_Blake2sFinal(Blake2s* b2s, byte* final, word32 requestSz)
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|
{
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word32 sz = requestSz ? requestSz : b2s->digestSz;
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return blake2s_final(b2s->S, final, (byte)sz);
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}
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/* end CTaoCrypt API */
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#endif /* HAVE_BLAKE2S */
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