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/* |
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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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#include <stdint.h> |
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#include <string.h> |
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#include <stdio.h> |
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#include "blake2.h" |
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#include "blake2-impl.h" |
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static const uint64_t blake2b_IV[8] = |
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{ |
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0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, |
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0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL, |
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0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL, |
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0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL |
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}; |
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static const uint8_t blake2b_sigma[12][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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{ 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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}; |
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static inline int blake2b_set_lastnode( blake2b_state *S ) |
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{ |
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S->f[1] = ~0ULL; |
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return 0; |
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} |
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static inline int blake2b_clear_lastnode( blake2b_state *S ) |
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{ |
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S->f[1] = 0ULL; |
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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 inline int blake2b_set_lastblock( blake2b_state *S ) |
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{ |
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if( S->last_node ) blake2b_set_lastnode( S ); |
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S->f[0] = ~0ULL; |
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return 0; |
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} |
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static inline int blake2b_clear_lastblock( blake2b_state *S ) |
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{ |
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if( S->last_node ) blake2b_clear_lastnode( S ); |
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S->f[0] = 0ULL; |
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return 0; |
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} |
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static inline int blake2b_increment_counter( blake2b_state *S, const uint64_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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return 0; |
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} |
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// Parameter-related functions |
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static inline int blake2b_param_set_digest_length( blake2b_param *P, const uint8_t digest_length ) |
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{ |
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P->digest_length = digest_length; |
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return 0; |
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} |
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static inline int blake2b_param_set_fanout( blake2b_param *P, const uint8_t fanout ) |
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{ |
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P->fanout = fanout; |
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return 0; |
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} |
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static inline int blake2b_param_set_max_depth( blake2b_param *P, const uint8_t depth ) |
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{ |
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P->depth = depth; |
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return 0; |
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} |
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static inline int blake2b_param_set_leaf_length( blake2b_param *P, const uint32_t leaf_length ) |
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{ |
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store32( &P->leaf_length, leaf_length ); |
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return 0; |
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} |
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static inline int blake2b_param_set_node_offset( blake2b_param *P, const uint64_t node_offset ) |
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{ |
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store64( &P->node_offset, node_offset ); |
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return 0; |
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} |
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static inline int blake2b_param_set_node_depth( blake2b_param *P, const uint8_t node_depth ) |
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{ |
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P->node_depth = node_depth; |
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return 0; |
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} |
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static inline int blake2b_param_set_inner_length( blake2b_param *P, const uint8_t inner_length ) |
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{ |
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P->inner_length = inner_length; |
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return 0; |
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} |
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static inline int blake2b_param_set_salt( blake2b_param *P, const uint8_t salt[BLAKE2B_SALTBYTES] ) |
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{ |
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memcpy( P->salt, salt, BLAKE2B_SALTBYTES ); |
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return 0; |
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} |
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static inline int blake2b_param_set_personal( blake2b_param *P, const uint8_t personal[BLAKE2B_PERSONALBYTES] ) |
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{ |
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memcpy( P->personal, personal, BLAKE2B_PERSONALBYTES ); |
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return 0; |
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} |
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static inline int blake2b_init0( blake2b_state *S ) |
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{ |
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memset( S, 0, sizeof( blake2b_state ) ); |
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for( int i = 0; i < 8; ++i ) S->h[i] = blake2b_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 blake2b_init_param( blake2b_state *S, const blake2b_param *P ) |
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{ |
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blake2b_init0( S ); |
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const uint8_t *p = ( const uint8_t * )( P ); |
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/* IV XOR ParamBlock */ |
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for( size_t i = 0; i < 8; ++i ) |
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S->h[i] ^= load64( p + sizeof( S->h[i] ) * i ); |
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return 0; |
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} |
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int blake2b_init( blake2b_state *S, const uint8_t outlen ) |
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{ |
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blake2b_param P[1]; |
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if ( ( !outlen ) || ( outlen > BLAKE2B_OUTBYTES ) ) return -1; |
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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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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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memset( P->reserved, 0, sizeof( P->reserved ) ); |
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memset( P->salt, 0, sizeof( P->salt ) ); |
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memset( P->personal, 0, sizeof( P->personal ) ); |
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return blake2b_init_param( S, P ); |
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} |
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int blake2b_init_key( blake2b_state *S, const uint8_t outlen, const void *key, const uint8_t keylen ) |
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{ |
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blake2b_param P[1]; |
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if ( ( !outlen ) || ( outlen > BLAKE2B_OUTBYTES ) ) return -1; |
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if ( !key || !keylen || keylen > BLAKE2B_KEYBYTES ) return -1; |
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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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memset( P->reserved, 0, sizeof( P->reserved ) ); |
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memset( P->salt, 0, sizeof( P->salt ) ); |
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memset( P->personal, 0, sizeof( P->personal ) ); |
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if( blake2b_init_param( S, P ) < 0 ) return -1; |
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{ |
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uint8_t block[BLAKE2B_BLOCKBYTES]; |
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memset( block, 0, BLAKE2B_BLOCKBYTES ); |
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memcpy( block, key, keylen ); |
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blake2b_update( S, block, BLAKE2B_BLOCKBYTES ); |
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secure_zero_memory( block, BLAKE2B_BLOCKBYTES ); /* Burn the key from stack */ |
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} |
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return 0; |
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} |
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static int blake2b_compress( blake2b_state *S, const uint8_t block[BLAKE2B_BLOCKBYTES] ) |
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{ |
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uint64_t m[16]; |
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uint64_t v[16]; |
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int i; |
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for( i = 0; i < 16; ++i ) |
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m[i] = load64( 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] = blake2b_IV[0]; |
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v[ 9] = blake2b_IV[1]; |
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v[10] = blake2b_IV[2]; |
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v[11] = blake2b_IV[3]; |
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v[12] = S->t[0] ^ blake2b_IV[4]; |
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v[13] = S->t[1] ^ blake2b_IV[5]; |
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v[14] = S->f[0] ^ blake2b_IV[6]; |
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v[15] = S->f[1] ^ blake2b_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[blake2b_sigma[r][2*i+0]]; \ |
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d = rotr64(d ^ a, 32); \ |
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c = c + d; \ |
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b = rotr64(b ^ c, 24); \ |
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a = a + b + m[blake2b_sigma[r][2*i+1]]; \ |
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d = rotr64(d ^ a, 16); \ |
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c = c + d; \ |
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b = rotr64(b ^ c, 63); \ |
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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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ROUND( 10 ); |
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ROUND( 11 ); |
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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 blake2b_update( blake2b_state *S, const uint8_t *in, uint64_t inlen ) |
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{ |
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while( inlen > 0 ) |
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{ |
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size_t left = S->buflen; |
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size_t fill = 2 * BLAKE2B_BLOCKBYTES - left; |
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if( inlen > fill ) |
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{ |
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memcpy( S->buf + left, in, fill ); // Fill buffer |
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S->buflen += fill; |
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blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES ); |
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blake2b_compress( S, S->buf ); // Compress |
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memcpy( S->buf, S->buf + BLAKE2B_BLOCKBYTES, BLAKE2B_BLOCKBYTES ); // Shift buffer left |
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S->buflen -= BLAKE2B_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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memcpy( S->buf + left, in, inlen ); |
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S->buflen += inlen; // Be lazy, do not compress |
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in += inlen; |
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inlen -= inlen; |
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} |
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} |
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return 0; |
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} |
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/* Is this correct? */ |
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int blake2b_final( blake2b_state *S, uint8_t *out, uint8_t outlen ) |
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{ |
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uint8_t buffer[BLAKE2B_OUTBYTES] = {0}; |
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if( outlen > BLAKE2B_OUTBYTES ) |
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return -1; |
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if( S->buflen > BLAKE2B_BLOCKBYTES ) |
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{ |
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blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES ); |
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blake2b_compress( S, S->buf ); |
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S->buflen -= BLAKE2B_BLOCKBYTES; |
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memcpy( S->buf, S->buf + BLAKE2B_BLOCKBYTES, S->buflen ); |
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} |
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blake2b_increment_counter( S, S->buflen ); |
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blake2b_set_lastblock( S ); |
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memset( S->buf + S->buflen, 0, 2 * BLAKE2B_BLOCKBYTES - S->buflen ); /* Padding */ |
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blake2b_compress( S, S->buf ); |
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for( int 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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memcpy( out, buffer, outlen ); |
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return 0; |
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} |
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/* inlen, at least, should be uint64_t. Others can be size_t. */ |
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int blake2b( uint8_t *out, const void *in, const void *key, const uint8_t outlen, const uint64_t inlen, uint8_t keylen ) |
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{ |
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blake2b_state S[1]; |
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/* Verify parameters */ |
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if ( NULL == in ) return -1; |
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if ( NULL == out ) return -1; |
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if( NULL == key ) keylen = 0; |
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if( keylen > 0 ) |
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{ |
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if( blake2b_init_key( S, outlen, key, keylen ) < 0 ) return -1; |
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} |
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else |
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{ |
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if( blake2b_init( S, outlen ) < 0 ) return -1; |
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} |
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blake2b_update( S, ( const uint8_t * )in, inlen ); |
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blake2b_final( S, out, outlen ); |
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return 0; |
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} |
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#if defined(BLAKE2B_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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uint8_t key[BLAKE2B_KEYBYTES]; |
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uint8_t buf[KAT_LENGTH]; |
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for( size_t i = 0; i < BLAKE2B_KEYBYTES; ++i ) |
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key[i] = ( uint8_t )i; |
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for( size_t i = 0; i < KAT_LENGTH; ++i ) |
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buf[i] = ( uint8_t )i; |
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for( size_t i = 0; i < KAT_LENGTH; ++i ) |
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{ |
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uint8_t hash[BLAKE2B_OUTBYTES]; |
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blake2b( hash, buf, key, BLAKE2B_OUTBYTES, i, BLAKE2B_KEYBYTES ); |
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if( 0 != memcmp( hash, blake2b_keyed_kat[i], BLAKE2B_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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