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Implement pk_check_pair() for RSA-alt

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Manuel Pégourié-Gonnard 2014-11-08 17:08:08 +01:00
parent 27e3edbe2c
commit a1efcb084f
3 changed files with 53 additions and 9 deletions
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14
library/pk.c
View file

@ -306,18 +306,24 @@ int pk_encrypt( pk_context *ctx,
int pk_check_pair( const pk_context *pub, const pk_context *prv )
{
if( pub == NULL || pub->pk_info == NULL ||
prv == NULL || prv->pk_info == NULL )
prv == NULL || prv->pk_info == NULL ||
prv->pk_info->check_pair_func == NULL )
{
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
}
if( pub->pk_info != prv->pk_info ||
pub->pk_info->check_pair_func == NULL )
if( prv->pk_info->type == POLARSSL_PK_RSA_ALT )
{
if( pub->pk_info->type != POLARSSL_PK_RSA )
return( POLARSSL_ERR_PK_TYPE_MISMATCH );
}
else
{
if( pub->pk_info != prv->pk_info )
return( POLARSSL_ERR_PK_TYPE_MISMATCH );
}
return( pub->pk_info->check_pair_func( pub->pk_ctx, prv->pk_ctx ) );
return( prv->pk_info->check_pair_func( pub->pk_ctx, prv->pk_ctx ) );
}
/*

35
library/pk_wrap.c
View file

@ -117,10 +117,11 @@ static int rsa_encrypt_wrap( void *ctx,
unsigned char *output, size_t *olen, size_t osize,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{
((void) osize);
*olen = ((rsa_context *) ctx)->len;
if( *olen > osize )
return( POLARSSL_ERR_RSA_OUTPUT_TOO_LARGE );
return( rsa_pkcs1_encrypt( (rsa_context *) ctx,
f_rng, p_rng, RSA_PUBLIC, ilen, input, output ) );
}
@ -435,6 +436,34 @@ static int rsa_alt_decrypt_wrap( void *ctx,
RSA_PRIVATE, olen, input, output, osize ) );
}
static int rsa_alt_check_pair( const void *pub, const void *prv )
{
unsigned char sig[POLARSSL_MPI_MAX_SIZE];
unsigned char hash[32];
size_t sig_len = 0;
int ret;
if( rsa_alt_get_size( prv ) != rsa_get_size( pub ) )
return( POLARSSL_ERR_RSA_KEY_CHECK_FAILED );
memset( hash, 0x2a, sizeof( hash ) );
if( ( ret = rsa_alt_sign_wrap( (void *) prv, POLARSSL_MD_NONE,
hash, sizeof( hash ),
sig, &sig_len, NULL, NULL ) ) != 0 )
{
return( ret );
}
if( rsa_verify_wrap( (void *) pub, POLARSSL_MD_NONE,
hash, sizeof( hash ), sig, sig_len ) != 0 )
{
return( POLARSSL_ERR_RSA_KEY_CHECK_FAILED );
}
return( 0 );
}
static void *rsa_alt_alloc_wrap( void )
{
void *ctx = polarssl_malloc( sizeof( rsa_alt_context ) );
@ -460,7 +489,7 @@ const pk_info_t rsa_alt_info = {
rsa_alt_sign_wrap,
rsa_alt_decrypt_wrap,
NULL,
NULL, /* No public key */
rsa_alt_check_pair,
rsa_alt_alloc_wrap,
rsa_alt_free_wrap,
NULL,

11
tests/suites/test_suite_pk.function
View file

@ -83,18 +83,27 @@ exit:
/* BEGIN_CASE depends_on:POLARSSL_PK_PARSE_C */
void pk_check_pair( char *pub_file, char *prv_file, int ret )
{
pk_context pub, prv;
pk_context pub, prv, alt;
pk_init( &pub );
pk_init( &prv );
pk_init( &alt );
TEST_ASSERT( pk_parse_public_keyfile( &pub, pub_file ) == 0 );
TEST_ASSERT( pk_parse_keyfile( &prv, prv_file, NULL ) == 0 );
TEST_ASSERT( pk_check_pair( &pub, &prv ) == ret );
if( pk_get_type( &prv ) == POLARSSL_PK_RSA )
{
TEST_ASSERT( pk_init_ctx_rsa_alt( &alt, pk_rsa( prv ),
rsa_decrypt_func, rsa_sign_func, rsa_key_len_func ) == 0 );
TEST_ASSERT( pk_check_pair( &pub, &alt ) == ret );
}
pk_free( &pub );
pk_free( &prv );
pk_free( &alt );
}
/* END_CASE */