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Add ecjpake_kkp_read/write()

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Manuel Pégourié-Gonnard 2015-08-12 11:01:58 +02:00
parent 967cd7192d
commit b1b250b68c
1 changed files with 112 additions and 47 deletions
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159
library/ecjpake.c
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@ -236,6 +236,72 @@ cleanup:
return( ret );
}
/*
* Parse verify a ECJPAKEKeyKP (7.4.2.2.1)
* Output: public key X
*/
static int ecjpake_kkp_read( const mbedtls_md_info_t *md_info,
const mbedtls_ecp_group *grp,
const mbedtls_ecp_point *G,
mbedtls_ecp_point *X,
const char *id,
unsigned char **p,
const unsigned char *end )
{
int ret;
if( end < *p )
return( MBEDTLS_ERR_ECP_BAD_INPUT_DATA );
/*
* struct {
* ECPoint X;
* ECSchnorrZKP zkp;
* } ECJPAKEKeyKP;
*/
MBEDTLS_MPI_CHK( mbedtls_ecp_tls_read_point( grp, X,
(const unsigned char **) p, end - *p ) );
MBEDTLS_MPI_CHK( ecjpake_zkp_read( md_info, grp, G, X, id, p, end ) );
cleanup:
return( ret );
}
/*
* Generate an ECJPAKEKeyKP
* Output: the serialized structure, plus private/public key pair
*/
static int ecjpake_kkp_write( const mbedtls_md_info_t *md_info,
const mbedtls_ecp_group *grp,
const mbedtls_ecp_point *G,
mbedtls_mpi *x,
mbedtls_ecp_point *X,
const char *id,
unsigned char **p,
const unsigned char *end,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng )
{
int ret;
size_t len;
if( end < *p )
return( MBEDTLS_ERR_ECP_BUFFER_TOO_SMALL );
/* Generate key (7.4.2.3.1) and write it out */
MBEDTLS_MPI_CHK( mbedtls_ecp_gen_keypair_base( (mbedtls_ecp_group *) grp, G, x, X,
f_rng, p_rng ) );
MBEDTLS_MPI_CHK( mbedtls_ecp_tls_write_point( grp, X,
MBEDTLS_ECP_PF_UNCOMPRESSED, &len, *p, end - *p ) );
*p += len;
/* Generate and write proof */
MBEDTLS_MPI_CHK( ecjpake_zkp_write( md_info, grp, G, x, X, id,
p, end, f_rng, p_rng ) );
cleanup:
return( ret );
}
#if defined(MBEDTLS_SELF_TEST)
@ -255,25 +321,21 @@ int mbedtls_ecjpake_self_test( int verbose )
}
#else
static const unsigned char ecjpake_test_X[] = {
0x04, 0xac, 0xcf, 0x01, 0x06, 0xef, 0x85, 0x8f, 0xa2, 0xd9, 0x19, 0x33,
0x13, 0x46, 0x80, 0x5a, 0x78, 0xb5, 0x8b, 0xba, 0xd0, 0xb8, 0x44, 0xe5,
0xc7, 0x89, 0x28, 0x79, 0x14, 0x61, 0x87, 0xdd, 0x26, 0x66, 0xad, 0xa7,
0x81, 0xbb, 0x7f, 0x11, 0x13, 0x72, 0x25, 0x1a, 0x89, 0x10, 0x62, 0x1f,
0x63, 0x4d, 0xf1, 0x28, 0xac, 0x48, 0xe3, 0x81, 0xfd, 0x6e, 0xf9, 0x06,
0x07, 0x31, 0xf6, 0x94, 0xa4
};
static const unsigned char ecjpake_test_zkp[] = {
0x41, 0x04, 0x1d, 0xd0, 0xbd, 0x5d, 0x45, 0x66, 0xc9, 0xbe, 0xd9, 0xce,
0x7d, 0xe7, 0x01, 0xb5, 0xe8, 0x2e, 0x08, 0xe8, 0x4b, 0x73, 0x04, 0x66,
0x01, 0x8a, 0xb9, 0x03, 0xc7, 0x9e, 0xb9, 0x82, 0x17, 0x22, 0x36, 0xc0,
0xc1, 0x72, 0x8a, 0xe4, 0xbf, 0x73, 0x61, 0x0d, 0x34, 0xde, 0x44, 0x24,
0x6e, 0xf3, 0xd9, 0xc0, 0x5a, 0x22, 0x36, 0xfb, 0x66, 0xa6, 0x58, 0x3d,
0x74, 0x49, 0x30, 0x8b, 0xab, 0xce, 0x20, 0x72, 0xfe, 0x16, 0x66, 0x29,
0x92, 0xe9, 0x23, 0x5c, 0x25, 0x00, 0x2f, 0x11, 0xb1, 0x50, 0x87, 0xb8,
0x27, 0x38, 0xe0, 0x3c, 0x94, 0x5b, 0xf7, 0xa2, 0x99, 0x5d, 0xda, 0x1e,
0x98, 0x34, 0x58
static const unsigned char ecjpake_test_kkp[] = {
0x41, 0x04, 0xac, 0xcf, 0x01, 0x06, 0xef, 0x85, 0x8f, 0xa2, 0xd9, 0x19,
0x33, 0x13, 0x46, 0x80, 0x5a, 0x78, 0xb5, 0x8b, 0xba, 0xd0, 0xb8, 0x44,
0xe5, 0xc7, 0x89, 0x28, 0x79, 0x14, 0x61, 0x87, 0xdd, 0x26, 0x66, 0xad,
0xa7, 0x81, 0xbb, 0x7f, 0x11, 0x13, 0x72, 0x25, 0x1a, 0x89, 0x10, 0x62,
0x1f, 0x63, 0x4d, 0xf1, 0x28, 0xac, 0x48, 0xe3, 0x81, 0xfd, 0x6e, 0xf9,
0x06, 0x07, 0x31, 0xf6, 0x94, 0xa4, 0x41, 0x04, 0x1d, 0xd0, 0xbd, 0x5d,
0x45, 0x66, 0xc9, 0xbe, 0xd9, 0xce, 0x7d, 0xe7, 0x01, 0xb5, 0xe8, 0x2e,
0x08, 0xe8, 0x4b, 0x73, 0x04, 0x66, 0x01, 0x8a, 0xb9, 0x03, 0xc7, 0x9e,
0xb9, 0x82, 0x17, 0x22, 0x36, 0xc0, 0xc1, 0x72, 0x8a, 0xe4, 0xbf, 0x73,
0x61, 0x0d, 0x34, 0xde, 0x44, 0x24, 0x6e, 0xf3, 0xd9, 0xc0, 0x5a, 0x22,
0x36, 0xfb, 0x66, 0xa6, 0x58, 0x3d, 0x74, 0x49, 0x30, 0x8b, 0xab, 0xce,
0x20, 0x72, 0xfe, 0x16, 0x66, 0x29, 0x92, 0xe9, 0x23, 0x5c, 0x25, 0x00,
0x2f, 0x11, 0xb1, 0x50, 0x87, 0xb8, 0x27, 0x38, 0xe0, 0x3c, 0x94, 0x5b,
0xf7, 0xa2, 0x99, 0x5d, 0xda, 0x1e, 0x98, 0x34, 0x58
};
/* For tests we don't need a secure RNG;
@ -295,6 +357,17 @@ static int ecjpake_lgc( void *p, unsigned char *out, size_t len )
return( 0 );
}
#define TEST_ASSERT( x ) \
do { \
if( x ) \
ret = 0; \
else \
{ \
ret = 1; \
goto cleanup; \
} \
} while( 0 )
/*
* Checkup routine
*/
@ -318,48 +391,38 @@ int mbedtls_ecjpake_self_test( int verbose )
MBEDTLS_MPI_CHK( mbedtls_ecp_group_load( &grp, MBEDTLS_ECP_DP_SECP256R1 ) );
if( verbose != 0 )
mbedtls_printf( " ECJPAKE test #1 (zkp read): " );
mbedtls_printf( " ECJPAKE test #1 (kkp read): " );
MBEDTLS_MPI_CHK( mbedtls_ecp_point_read_binary( &grp, &X,
ecjpake_test_X,
sizeof( ecjpake_test_X ) ) );
p = (unsigned char *) ecjpake_test_zkp;
end = ecjpake_test_zkp + sizeof( ecjpake_test_zkp );
MBEDTLS_MPI_CHK( ecjpake_zkp_read( md_info, &grp, &grp.G, &X, "client",
p = (unsigned char *) ecjpake_test_kkp;
end = ecjpake_test_kkp + sizeof( ecjpake_test_kkp );
MBEDTLS_MPI_CHK( ecjpake_kkp_read( md_info, &grp, &grp.G, &X, "client",
&p, end ) );
/* Corrupt proof */
memcpy( buf, ecjpake_test_zkp, sizeof( ecjpake_test_zkp ) );
buf[sizeof( ecjpake_test_zkp ) - 1]--;
p = buf;
end = buf + sizeof( ecjpake_test_zkp );
ret = ecjpake_zkp_read( md_info, &grp, &grp.G, &X, "client", &p, end );
TEST_ASSERT( p == end );
if( ret != MBEDTLS_ERR_ECP_VERIFY_FAILED )
{
ret = 1;
goto cleanup;
}
ret = 0;
/* Corrupt proof */
memcpy( buf, ecjpake_test_kkp, sizeof( ecjpake_test_kkp ) );
buf[sizeof( ecjpake_test_kkp ) - 1]--;
p = buf;
end = buf + sizeof( ecjpake_test_kkp );
ret = ecjpake_kkp_read( md_info, &grp, &grp.G, &X, "client", &p, end );
TEST_ASSERT( ret == MBEDTLS_ERR_ECP_VERIFY_FAILED );
if( verbose != 0 )
mbedtls_printf( "passed\n" );
if( verbose != 0 )
mbedtls_printf( " ECJPAKE test #2 (zkp write/read): " );
MBEDTLS_MPI_CHK( mbedtls_ecp_gen_keypair_base( &grp, &grp.G, &x, &X,
ecjpake_lgc, NULL ) );
mbedtls_printf( " ECJPAKE test #2 (kkp write/read): " );
p = buf;
MBEDTLS_MPI_CHK( ecjpake_zkp_write( md_info, &grp, &grp.G, &x, &X, "client",
MBEDTLS_MPI_CHK( ecjpake_kkp_write( md_info, &grp, &grp.G, &x, &X, "client",
&p, buf + sizeof( buf ),
ecjpake_lgc, NULL ) );
end = p;
p = buf;
MBEDTLS_MPI_CHK( ecjpake_zkp_read( md_info, &grp, &grp.G, &X, "client",
&p, buf + sizeof( buf ) ) );
MBEDTLS_MPI_CHK( ecjpake_kkp_read( md_info, &grp, &grp.G, &X, "client",
&p, end ) );
if( verbose != 0 )
mbedtls_printf( "passed\n" );
@ -383,6 +446,8 @@ cleanup:
return( ret );
}
#undef TEST_ASSERT
#endif /* MBEDTLS_ECP_DP_SECP256R1_ENABLED && MBEDTLS_SHA256_C */
#endif /* MBEDTLS_SELF_TEST */