Commit bf2546f9 authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Use BN_nist_mod_func to avoid need to peek error queue.

parent 133291f8

crypto/ec/ec_cvt.c

+7 −31
Original line number Diff line number Diff line
@@ -69,6 +69,8 @@ 
 *

 */



#define OPENSSL_FIPSAPI



#include <openssl/err.h>

#include "ec_lcl.h"
@@ -78,34 +80,9 @@ EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, const BIGNUM 
	const EC_METHOD *meth;

	EC_GROUP *ret;



	if (BN_nist_mod_func(p))

		meth = EC_GFp_nist_method();

	

	ret = EC_GROUP_new(meth);

	if (ret == NULL)

		return NULL;



	if (!EC_GROUP_set_curve_GFp(ret, p, a, b, ctx))

		{

		unsigned long err;

		  

		err = ERR_peek_last_error();



		if (!(ERR_GET_LIB(err) == ERR_LIB_EC &&

			((ERR_GET_REASON(err) == EC_R_NOT_A_NIST_PRIME) ||

			 (ERR_GET_REASON(err) == EC_R_NOT_A_SUPPORTED_NIST_PRIME))))

			{

			/* real error */

			

			EC_GROUP_clear_free(ret);

			return NULL;

			}

			

		

		/* not an actual error, we just cannot use EC_GFp_nist_method */



		ERR_clear_error();



		EC_GROUP_clear_free(ret);

	else

		meth = EC_GFp_mont_method();

	

	ret = EC_GROUP_new(meth);
@@ -117,7 +94,6 @@ EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, const BIGNUM 
		EC_GROUP_clear_free(ret);

		return NULL;

		}

		}



	return ret;

	}