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319 lines
9.0 KiB
319 lines
9.0 KiB
/*
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BLAKE2 reference source code package - reference C implementations
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Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under the
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terms of the CC0, the OpenSSL Licence, or the Apache Public License 2.0, at
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your option. The terms of these licenses can be found at:
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- CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
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- OpenSSL license : https://www.openssl.org/source/license.html
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- Apache 2.0 : http://www.apache.org/licenses/LICENSE-2.0
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More information about the BLAKE2 hash function can be found at
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https://blake2.net.
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*/
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#include <string.h>
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#include "blake2s.h"
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#include "blake2_common.h"
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#include "memzero.h"
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typedef struct blake2s_param__
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{
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uint8_t digest_length; /* 1 */
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uint8_t key_length; /* 2 */
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uint8_t fanout; /* 3 */
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uint8_t depth; /* 4 */
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uint32_t leaf_length; /* 8 */
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uint32_t node_offset; /* 12 */
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uint16_t xof_length; /* 14 */
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uint8_t node_depth; /* 15 */
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uint8_t inner_length; /* 16 */
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/* uint8_t reserved[0]; */
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uint8_t salt[BLAKE2S_SALTBYTES]; /* 24 */
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uint8_t personal[BLAKE2S_PERSONALBYTES]; /* 32 */
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} __attribute__((packed)) blake2s_param;
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static const uint32_t blake2s_IV[8] =
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{
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0x6A09E667UL, 0xBB67AE85UL, 0x3C6EF372UL, 0xA54FF53AUL,
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0x510E527FUL, 0x9B05688CUL, 0x1F83D9ABUL, 0x5BE0CD19UL
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};
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static const uint8_t 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 void blake2s_set_lastnode( blake2s_state *S )
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{
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S->f[1] = (uint32_t)-1;
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}
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/* Some helper functions, not necessarily useful */
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static int blake2s_is_lastblock( const blake2s_state *S )
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{
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return S->f[0] != 0;
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}
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static void 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] = (uint32_t)-1;
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}
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static void blake2s_increment_counter( blake2s_state *S, const uint32_t 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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}
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static void blake2s_init0( blake2s_state *S )
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{
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size_t i = 0;
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memzero( S, sizeof( blake2s_state ) );
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for( i = 0; i < 8; ++i ) S->h[i] = blake2s_IV[i];
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}
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/* init2 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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const unsigned char *p = ( const unsigned char * )( P );
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size_t i = 0;
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blake2s_init0( S );
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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[i * 4] );
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S->outlen = P->digest_length;
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return 0;
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}
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/* Sequential blake2s initialization */
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int blake2s_Init( blake2s_state *S, size_t outlen )
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{
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blake2s_param P[1] = {0};
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if ( ( !outlen ) || ( outlen > BLAKE2S_OUTBYTES ) ) return -1;
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P->digest_length = (uint8_t)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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store16( &P->xof_length, 0 );
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P->node_depth = 0;
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P->inner_length = 0;
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/* memzero(P->reserved, sizeof(P->reserved) ); */
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memzero( P->salt, sizeof( P->salt ) );
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memzero( P->personal, sizeof( P->personal ) );
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return blake2s_init_param( S, P );
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}
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int blake2s_InitPersonal( blake2s_state *S, size_t outlen, const void *personal, size_t personal_len)
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{
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blake2s_param P[1] = {0};
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if ( ( !outlen ) || ( outlen > BLAKE2S_OUTBYTES ) ) return -1;
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if ( ( !personal ) || ( personal_len != BLAKE2S_PERSONALBYTES ) ) return -1;
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P->digest_length = (uint8_t)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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store16( &P->xof_length, 0 );
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P->node_depth = 0;
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P->inner_length = 0;
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/* memzero(P->reserved, sizeof(P->reserved) ); */
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memzero( P->salt, sizeof( P->salt ) );
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memcpy( P->personal, personal, BLAKE2S_PERSONALBYTES );
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return blake2s_init_param( S, P );
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}
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int blake2s_InitKey( blake2s_state *S, size_t outlen, const void *key, size_t keylen )
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{
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blake2s_param P[1] = {0};
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if ( ( !outlen ) || ( outlen > BLAKE2S_OUTBYTES ) ) return -1;
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if ( !key || !keylen || keylen > BLAKE2S_KEYBYTES ) return -1;
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P->digest_length = (uint8_t)outlen;
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P->key_length = (uint8_t)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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store32( &P->node_offset, 0 );
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store16( &P->xof_length, 0 );
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P->node_depth = 0;
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P->inner_length = 0;
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/* memzero(P->reserved, sizeof(P->reserved) ); */
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memzero( P->salt, sizeof( P->salt ) );
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memzero( P->personal, sizeof( P->personal ) );
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if( blake2s_init_param( S, P ) < 0 ) return -1;
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{
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uint8_t block[BLAKE2S_BLOCKBYTES] = {0};
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memzero( block, BLAKE2S_BLOCKBYTES );
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memcpy( block, key, keylen );
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blake2s_Update( S, block, BLAKE2S_BLOCKBYTES );
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memzero( block, BLAKE2S_BLOCKBYTES ); /* Burn the key from stack */
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}
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return 0;
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}
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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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static void blake2s_compress( blake2s_state *S, const uint8_t in[BLAKE2S_BLOCKBYTES] )
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{
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uint32_t m[16] = {0};
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uint32_t v[16] = {0};
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size_t i = 0;
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for( i = 0; i < 16; ++i ) {
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m[i] = load32( in + i * sizeof( m[i] ) );
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}
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for( i = 0; i < 8; ++i ) {
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v[i] = S->h[i];
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}
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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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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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}
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}
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#undef G
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#undef ROUND
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int blake2s_Update( blake2s_state *S, const void *pin, size_t inlen )
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{
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const unsigned char * in = (const unsigned char *)pin;
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if( inlen > 0 )
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{
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size_t left = S->buflen;
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size_t fill = BLAKE2S_BLOCKBYTES - left;
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if( inlen > fill )
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{
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S->buflen = 0;
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memcpy( S->buf + left, in, fill ); /* Fill buffer */
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blake2s_increment_counter( S, BLAKE2S_BLOCKBYTES );
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blake2s_compress( S, S->buf ); /* Compress */
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in += fill; inlen -= fill;
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while(inlen > BLAKE2S_BLOCKBYTES) {
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blake2s_increment_counter(S, BLAKE2S_BLOCKBYTES);
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blake2s_compress( S, in );
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in += BLAKE2S_BLOCKBYTES;
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inlen -= BLAKE2S_BLOCKBYTES;
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}
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}
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memcpy( S->buf + S->buflen, in, inlen );
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S->buflen += inlen;
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}
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return 0;
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}
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int blake2s_Final( blake2s_state *S, void *out, size_t outlen )
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{
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uint8_t buffer[BLAKE2S_OUTBYTES] = {0};
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size_t i = 0;
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if( out == NULL || outlen < S->outlen )
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return -1;
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if( blake2s_is_lastblock( S ) )
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return -1;
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blake2s_increment_counter( S, ( uint32_t )S->buflen );
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blake2s_set_lastblock( S );
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memzero( S->buf + S->buflen, BLAKE2S_BLOCKBYTES - S->buflen ); /* Padding */
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blake2s_compress( S, S->buf );
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for( i = 0; i < 8; ++i ) /* Output full hash to temp buffer */
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store32( buffer + sizeof( S->h[i] ) * i, S->h[i] );
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memcpy( out, buffer, outlen );
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memzero(buffer, sizeof(buffer));
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return 0;
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}
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int blake2s(const uint8_t *msg, uint32_t msg_len, void *out, size_t outlen)
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{
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BLAKE2S_CTX ctx;
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if (0 != blake2s_Init(&ctx, outlen)) return -1;
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if (0 != blake2s_Update(&ctx, msg, msg_len)) return -1;
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if (0 != blake2s_Final(&ctx, out, outlen)) return -1;
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return 0;
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}
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int blake2s_Key(const uint8_t *msg, uint32_t msg_len, const void *key, size_t keylen, void *out, size_t outlen)
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{
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BLAKE2S_CTX ctx;
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if (0 != blake2s_InitKey(&ctx, outlen, key, keylen)) return -1;
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if (0 != blake2s_Update(&ctx, msg, msg_len)) return -1;
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if (0 != blake2s_Final(&ctx, out, outlen)) return -1;
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return 0;
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}
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