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Implement pk_check_pair() for RSA-alt

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This commit is contained in:
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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35
library/pk_wrap.c
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@ -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,