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Allow NULL pointer in mbedtls_x509_get_sig_alg if params not needed

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Also, set `sig_opts` pointer to `NULL` if no signature algorithm
parameters are given (to reflect exactly that).
This commit is contained in:
Hanno Becker 2019-02-22 16:03:29 +00:00
parent c84fd1cd95
commit 1898b68f09
1 changed files with 8 additions and 5 deletions
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13
library/x509.c
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@ -811,9 +811,6 @@ int mbedtls_x509_get_sig_alg( const mbedtls_x509_buf *sig_oid, const mbedtls_x50
{
int ret;
if( *sig_opts != NULL )
return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
if( ( ret = mbedtls_oid_get_sig_alg( sig_oid, md_alg, pk_alg ) ) != 0 )
return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG + ret );
@ -836,7 +833,10 @@ int mbedtls_x509_get_sig_alg( const mbedtls_x509_buf *sig_oid, const mbedtls_x50
return( ret );
}
*sig_opts = (void *) pss_opts;
if( sig_opts != NULL )
*sig_opts = (void *) pss_opts;
else
mbedtls_free( pss_opts );
}
else
#endif /* MBEDTLS_X509_RSASSA_PSS_SUPPORT */
@ -844,7 +844,10 @@ int mbedtls_x509_get_sig_alg( const mbedtls_x509_buf *sig_oid, const mbedtls_x50
/* Make sure parameters are absent or NULL */
if( ( sig_params->tag != MBEDTLS_ASN1_NULL && sig_params->tag != 0 ) ||
sig_params->len != 0 )
return( MBEDTLS_ERR_X509_INVALID_ALG );
return( MBEDTLS_ERR_X509_INVALID_ALG );
if( sig_opts != NULL )
*sig_opts = NULL;
}
return( 0 );