freebsd-dev/sys/contrib/libb2/blake2b-ref.c
Conrad Meyer 0e33efe4e4 Import Blake2 algorithms (blake2b, blake2s) from libb2
The upstream repository is on github BLAKE2/libb2.  Files landed in
sys/contrib/libb2 are the unmodified upstream files, except for one
difference:  secure_zero_memory's contents have been replaced with
explicit_bzero() only because the previous implementation broke powerpc
link.  Preferential use of explicit_bzero() is in progress upstream, so
it is anticipated we will be able to drop this diff in the future.

sys/crypto/blake2 contains the source files needed to port libb2 to our
build system, a wrapped (limited) variant of the algorithm to match the API
of our auth_transform softcrypto abstraction, incorporation into the Open
Crypto Framework (OCF) cryptosoft(4) driver, as well as an x86 SSE/AVX
accelerated OCF driver, blake2(4).

Optimized variants of blake2 are compiled for a number of x86 machines
(anything from SSE2 to AVX + XOP).  On those machines, FPU context will need
to be explicitly saved before using blake2(4)-provided algorithms directly.
Use via cryptodev / OCF saves FPU state automatically, and use via the
auth_transform softcrypto abstraction does not use FPU.

The intent of the OCF driver is mostly to enable testing in userspace via
/dev/crypto.  ATF tests are added with published KAT test vectors to
validate correctness.

Reviewed by:	jhb, markj
Obtained from:	github BLAKE2/libb2
Differential Revision:	https://reviews.freebsd.org/D14662
2018-03-21 16:18:14 +00:00

387 lines
10 KiB
C

/*
BLAKE2 reference source code package - reference C implementations
Written in 2012 by Samuel Neves <sneves@dei.uc.pt>
To the extent possible under law, the author(s) have dedicated all copyright
and related and neighboring rights to this software to the public domain
worldwide. This software is distributed without any warranty.
You should have received a copy of the CC0 Public Domain Dedication along with
this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include "blake2.h"
#include "blake2-impl.h"
static const uint64_t blake2b_IV[8] =
{
0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL,
0x3c6ef372fe94f82bULL, 0xa54ff53a5f1d36f1ULL,
0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL,
0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL
};
static const uint8_t blake2b_sigma[12][16] =
{
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } ,
{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 } ,
{ 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 } ,
{ 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 } ,
{ 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 } ,
{ 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 } ,
{ 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 } ,
{ 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 } ,
{ 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 } ,
{ 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13 , 0 } ,
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } ,
{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }
};
static inline int blake2b_set_lastnode( blake2b_state *S )
{
S->f[1] = ~0ULL;
return 0;
}
static inline int blake2b_clear_lastnode( blake2b_state *S )
{
S->f[1] = 0ULL;
return 0;
}
/* Some helper functions, not necessarily useful */
static inline int blake2b_set_lastblock( blake2b_state *S )
{
if( S->last_node ) blake2b_set_lastnode( S );
S->f[0] = ~0ULL;
return 0;
}
static inline int blake2b_clear_lastblock( blake2b_state *S )
{
if( S->last_node ) blake2b_clear_lastnode( S );
S->f[0] = 0ULL;
return 0;
}
static inline int blake2b_increment_counter( blake2b_state *S, const uint64_t inc )
{
S->t[0] += inc;
S->t[1] += ( S->t[0] < inc );
return 0;
}
// Parameter-related functions
static inline int blake2b_param_set_digest_length( blake2b_param *P, const uint8_t digest_length )
{
P->digest_length = digest_length;
return 0;
}
static inline int blake2b_param_set_fanout( blake2b_param *P, const uint8_t fanout )
{
P->fanout = fanout;
return 0;
}
static inline int blake2b_param_set_max_depth( blake2b_param *P, const uint8_t depth )
{
P->depth = depth;
return 0;
}
static inline int blake2b_param_set_leaf_length( blake2b_param *P, const uint32_t leaf_length )
{
store32( &P->leaf_length, leaf_length );
return 0;
}
static inline int blake2b_param_set_node_offset( blake2b_param *P, const uint64_t node_offset )
{
store64( &P->node_offset, node_offset );
return 0;
}
static inline int blake2b_param_set_node_depth( blake2b_param *P, const uint8_t node_depth )
{
P->node_depth = node_depth;
return 0;
}
static inline int blake2b_param_set_inner_length( blake2b_param *P, const uint8_t inner_length )
{
P->inner_length = inner_length;
return 0;
}
static inline int blake2b_param_set_salt( blake2b_param *P, const uint8_t salt[BLAKE2B_SALTBYTES] )
{
memcpy( P->salt, salt, BLAKE2B_SALTBYTES );
return 0;
}
static inline int blake2b_param_set_personal( blake2b_param *P, const uint8_t personal[BLAKE2B_PERSONALBYTES] )
{
memcpy( P->personal, personal, BLAKE2B_PERSONALBYTES );
return 0;
}
static inline int blake2b_init0( blake2b_state *S )
{
memset( S, 0, sizeof( blake2b_state ) );
for( int i = 0; i < 8; ++i ) S->h[i] = blake2b_IV[i];
return 0;
}
#define blake2b_init BLAKE2_IMPL_NAME(blake2b_init)
#define blake2b_init_param BLAKE2_IMPL_NAME(blake2b_init_param)
#define blake2b_init_key BLAKE2_IMPL_NAME(blake2b_init_key)
#define blake2b_update BLAKE2_IMPL_NAME(blake2b_update)
#define blake2b_final BLAKE2_IMPL_NAME(blake2b_final)
#define blake2b BLAKE2_IMPL_NAME(blake2b)
#if defined(__cplusplus)
extern "C" {
#endif
int blake2b_init( blake2b_state *S, size_t outlen );
int blake2b_init_param( blake2b_state *S, const blake2b_param *P );
int blake2b_init_key( blake2b_state *S, size_t outlen, const void *key, size_t keylen );
int blake2b_update( blake2b_state *S, const uint8_t *in, size_t inlen );
int blake2b_final( blake2b_state *S, uint8_t *out, size_t outlen );
int blake2b( uint8_t *out, const void *in, const void *key, size_t outlen, size_t inlen, size_t keylen );
#if defined(__cplusplus)
}
#endif
/* init xors IV with input parameter block */
int blake2b_init_param( blake2b_state *S, const blake2b_param *P )
{
blake2b_init0( S );
uint8_t *p = ( uint8_t * )( P );
/* IV XOR ParamBlock */
for( size_t i = 0; i < 8; ++i )
S->h[i] ^= load64( p + sizeof( S->h[i] ) * i );
S->outlen = P->digest_length;
return 0;
}
int blake2b_init( blake2b_state *S, size_t outlen )
{
blake2b_param P[1];
if ( ( !outlen ) || ( outlen > BLAKE2B_OUTBYTES ) ) return -1;
P->digest_length = ( uint8_t ) outlen;
P->key_length = 0;
P->fanout = 1;
P->depth = 1;
store32( &P->leaf_length, 0 );
store64( &P->node_offset, 0 );
P->node_depth = 0;
P->inner_length = 0;
memset( P->reserved, 0, sizeof( P->reserved ) );
memset( P->salt, 0, sizeof( P->salt ) );
memset( P->personal, 0, sizeof( P->personal ) );
return blake2b_init_param( S, P );
}
int blake2b_init_key( blake2b_state *S, size_t outlen, const void *key, size_t keylen )
{
blake2b_param P[1];
if ( ( !outlen ) || ( outlen > BLAKE2B_OUTBYTES ) ) return -1;
if ( !key || !keylen || keylen > BLAKE2B_KEYBYTES ) return -1;
P->digest_length = ( uint8_t ) outlen;
P->key_length = ( uint8_t ) keylen;
P->fanout = 1;
P->depth = 1;
store32( &P->leaf_length, 0 );
store64( &P->node_offset, 0 );
P->node_depth = 0;
P->inner_length = 0;
memset( P->reserved, 0, sizeof( P->reserved ) );
memset( P->salt, 0, sizeof( P->salt ) );
memset( P->personal, 0, sizeof( P->personal ) );
if( blake2b_init_param( S, P ) < 0 ) return -1;
{
uint8_t block[BLAKE2B_BLOCKBYTES];
memset( block, 0, BLAKE2B_BLOCKBYTES );
memcpy( block, key, keylen );
blake2b_update( S, block, BLAKE2B_BLOCKBYTES );
secure_zero_memory( block, BLAKE2B_BLOCKBYTES ); /* Burn the key from stack */
}
return 0;
}
static int blake2b_compress( blake2b_state *S, const uint8_t block[BLAKE2B_BLOCKBYTES] )
{
uint64_t m[16];
uint64_t v[16];
size_t i;
for( i = 0; i < 16; ++i )
m[i] = load64( block + i * sizeof( m[i] ) );
for( i = 0; i < 8; ++i )
v[i] = S->h[i];
v[ 8] = blake2b_IV[0];
v[ 9] = blake2b_IV[1];
v[10] = blake2b_IV[2];
v[11] = blake2b_IV[3];
v[12] = S->t[0] ^ blake2b_IV[4];
v[13] = S->t[1] ^ blake2b_IV[5];
v[14] = S->f[0] ^ blake2b_IV[6];
v[15] = S->f[1] ^ blake2b_IV[7];
#define G(r,i,a,b,c,d) \
do { \
a = a + b + m[blake2b_sigma[r][2*i+0]]; \
d = rotr64(d ^ a, 32); \
c = c + d; \
b = rotr64(b ^ c, 24); \
a = a + b + m[blake2b_sigma[r][2*i+1]]; \
d = rotr64(d ^ a, 16); \
c = c + d; \
b = rotr64(b ^ c, 63); \
} while(0)
#define ROUND(r) \
do { \
G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
G(r,2,v[ 2],v[ 6],v[10],v[14]); \
G(r,3,v[ 3],v[ 7],v[11],v[15]); \
G(r,4,v[ 0],v[ 5],v[10],v[15]); \
G(r,5,v[ 1],v[ 6],v[11],v[12]); \
G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
} while(0)
ROUND( 0 );
ROUND( 1 );
ROUND( 2 );
ROUND( 3 );
ROUND( 4 );
ROUND( 5 );
ROUND( 6 );
ROUND( 7 );
ROUND( 8 );
ROUND( 9 );
ROUND( 10 );
ROUND( 11 );
for( i = 0; i < 8; ++i )
S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
#undef G
#undef ROUND
return 0;
}
int blake2b_update( blake2b_state *S, const uint8_t *in, size_t inlen )
{
while( inlen > 0 )
{
uint32_t left = S->buflen;
uint32_t fill = 2 * BLAKE2B_BLOCKBYTES - left;
if( inlen > fill )
{
memcpy( S->buf + left, in, fill ); // Fill buffer
S->buflen += fill;
blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES );
blake2b_compress( S, S->buf ); // Compress
memcpy( S->buf, S->buf + BLAKE2B_BLOCKBYTES, BLAKE2B_BLOCKBYTES ); // Shift buffer left
S->buflen -= BLAKE2B_BLOCKBYTES;
in += fill;
inlen -= fill;
}
else // inlen <= fill
{
memcpy( S->buf + left, in, inlen );
S->buflen += ( uint32_t ) inlen; // Be lazy, do not compress
in += inlen;
inlen -= inlen;
}
}
return 0;
}
int blake2b_final( blake2b_state *S, uint8_t *out, size_t outlen )
{
uint8_t buffer[BLAKE2B_OUTBYTES];
size_t i;
if(S->outlen != outlen) return -1;
if( S->buflen > BLAKE2B_BLOCKBYTES )
{
blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES );
blake2b_compress( S, S->buf );
S->buflen -= BLAKE2B_BLOCKBYTES;
memcpy( S->buf, S->buf + BLAKE2B_BLOCKBYTES, S->buflen );
}
blake2b_increment_counter( S, S->buflen );
blake2b_set_lastblock( S );
memset( S->buf + S->buflen, 0, 2 * BLAKE2B_BLOCKBYTES - S->buflen ); /* Padding */
blake2b_compress( S, S->buf );
for( i = 0; i < 8; ++i ) /* Output full hash to temp buffer */
store64( buffer + sizeof( S->h[i] ) * i, S->h[i] );
memcpy( out, buffer, outlen );
return 0;
}
int blake2b( uint8_t *out, const void *in, const void *key, size_t outlen, size_t inlen, size_t keylen )
{
blake2b_state S[1];
/* Verify parameters */
if ( NULL == in && inlen > 0 ) return -1;
if ( NULL == out ) return -1;
if( NULL == key && keylen > 0 ) return -1;
if( !outlen || outlen > BLAKE2B_OUTBYTES ) return -1;
if( keylen > BLAKE2B_KEYBYTES ) return -1;
if( keylen > 0 )
{
if( blake2b_init_key( S, outlen, key, keylen ) < 0 ) return -1;
}
else
{
if( blake2b_init( S, outlen ) < 0 ) return -1;
}
if( blake2b_update( S, ( uint8_t * )in, inlen ) < 0 ) return -1;
return blake2b_final( S, out, outlen );
}