Define MODP_CUSTOM constructors as variadic functions

They now match the dh_constructor_t signature.  This is a follow up for
the changes merged with b668bf3f9e and should fix use of MODP_CUSTOM on
Apple's ARM64 platform.

src/libstrongswan/plugins/gcrypt/gcrypt_dh.c

@@ -289,11 +289,13 @@ gcrypt_dh_t *gcrypt_dh_create(diffie_hellman_group_t group)
 /*
  * Described in header.
  */
-gcrypt_dh_t *gcrypt_dh_create_custom(diffie_hellman_group_t group,
-									 chunk_t g, chunk_t p)
+gcrypt_dh_t *gcrypt_dh_create_custom(diffie_hellman_group_t group, ...)
 {
 	if (group == MODP_CUSTOM)
 	{
+		chunk_t g, p;
+
+		VA_ARGS_GET(group, g, p);
 		return create_generic(group, p.len, g, p);
 	}
 	return NULL;

src/libstrongswan/plugins/gcrypt/gcrypt_dh.h

@@ -48,12 +48,10 @@ gcrypt_dh_t *gcrypt_dh_create(diffie_hellman_group_t group);
  * Creates a new gcrypt_dh_t object for MODP_CUSTOM.
  *
  * @param group			MODP_CUSTOM
- * @param g				generator
- * @param p				prime
+ * @param ...			expects generator and prime as chunk_t
  * @return				gcrypt_dh_t object, NULL if not supported
  */
-gcrypt_dh_t *gcrypt_dh_create_custom(diffie_hellman_group_t group,
-									 chunk_t g, chunk_t p);
+gcrypt_dh_t *gcrypt_dh_create_custom(diffie_hellman_group_t group, ...);
 
 #endif /** GCRYPT_DH_H_ @}*/
 

src/libstrongswan/plugins/gmp/gmp_diffie_hellman.c

@@ -272,7 +272,7 @@ static gmp_diffie_hellman_t *create_generic(diffie_hellman_group_t group,
 }
 
 /*
- * Described in header.
+ * Described in header
  */
 gmp_diffie_hellman_t *gmp_diffie_hellman_create(diffie_hellman_group_t group)
 {
@@ -287,12 +287,17 @@ gmp_diffie_hellman_t *gmp_diffie_hellman_create(diffie_hellman_group_t group)
 						  params->generator, params->prime);
 }
 
-
+/*
+ * Described in header
+ */
 gmp_diffie_hellman_t *gmp_diffie_hellman_create_custom(
-							diffie_hellman_group_t group, chunk_t g, chunk_t p)
+											diffie_hellman_group_t group, ...)
 {
 	if (group == MODP_CUSTOM)
 	{
+		chunk_t g, p;
+
+		VA_ARGS_GET(group, g, p);
 		return create_generic(MODP_CUSTOM, p.len, g, p);
 	}
 	return NULL;

src/libstrongswan/plugins/gmp/gmp_diffie_hellman.h

@@ -49,12 +49,11 @@ gmp_diffie_hellman_t *gmp_diffie_hellman_create(diffie_hellman_group_t group);
  * Creates a new gmp_diffie_hellman_t object for MODP_CUSTOM.
  *
  * @param group			MODP_CUSTOM
- * @param g				generator
- * @param p				prime
+ * @param ...			expects generator and prime as chunk_t
  * @return				gmp_diffie_hellman_t object, NULL if not supported
  */
 gmp_diffie_hellman_t *gmp_diffie_hellman_create_custom(
-							diffie_hellman_group_t group, chunk_t g, chunk_t p);
+							diffie_hellman_group_t group, ...);
 
 #endif /** GMP_DIFFIE_HELLMAN_H_ @}*/
 

src/libstrongswan/plugins/openssl/openssl_diffie_hellman.c

@@ -193,7 +193,7 @@ METHOD(diffie_hellman_t, destroy, void,
  * Described in header.
  */
 openssl_diffie_hellman_t *openssl_diffie_hellman_create(
-							diffie_hellman_group_t group, chunk_t g, chunk_t p)
+											diffie_hellman_group_t group, ...)
 {
 	private_openssl_diffie_hellman_t *this;
 	const BIGNUM *privkey;
@@ -225,6 +225,9 @@ openssl_diffie_hellman_t *openssl_diffie_hellman_create(
 
 	if (group == MODP_CUSTOM)
 	{
+		chunk_t g, p;
+
+		VA_ARGS_GET(group, g, p);
 		if (!DH_set0_pqg(this->dh, BN_bin2bn(p.ptr, p.len, NULL), NULL,
 						 BN_bin2bn(g.ptr, g.len, NULL)))
 		{

src/libstrongswan/plugins/openssl/openssl_diffie_hellman.h

@@ -40,12 +40,11 @@ struct openssl_diffie_hellman_t {
  * Creates a new openssl_diffie_hellman_t object.
  *
  * @param group			Diffie Hellman group number to use
- * @param g				custom generator, if MODP_CUSTOM
- * @param p				custom prime, if MODP_CUSTOM
+ * @param ...			expects generator and prime as chunk_t if MODP_CUSTOM
  * @return				openssl_diffie_hellman_t object, NULL if not supported
  */
 openssl_diffie_hellman_t *openssl_diffie_hellman_create(
-							diffie_hellman_group_t group, chunk_t g, chunk_t p);
+											diffie_hellman_group_t group, ...);
 
 #endif /** OPENSSL_DIFFIE_HELLMAN_H_ @}*/
 

src/libstrongswan/plugins/pkcs11/pkcs11_dh.c

@@ -415,13 +415,15 @@ static chunk_t ecparams_lookup(diffie_hellman_group_t group)
 /**
  * Described in header.
  */
-pkcs11_dh_t *pkcs11_dh_create(diffie_hellman_group_t group,
-							  chunk_t g, chunk_t p)
+pkcs11_dh_t *pkcs11_dh_create(diffie_hellman_group_t group, ...)
 {
 	switch (group)
 	{
 		case MODP_CUSTOM:
 		{
+			chunk_t g, p;
+
+			VA_ARGS_GET(group, g, p);
 			return create_modp(group, p.len, g, p);
 		}
 		case ECP_192_BIT:

src/libstrongswan/plugins/pkcs11/pkcs11_dh.h

@@ -40,12 +40,10 @@ struct pkcs11_dh_t {
  * Creates a new pkcs11_dh_t object.
  *
  * @param group			Diffie Hellman group number to use
- * @param g				generator in case group is MODP_CUSTOM
- * @param p				prime in case group is MODP_CUSTOM
+ * @param ...			expects generator and prime as chunk_t if MODP_CUSTOM
  * @return				pkcs11_dh_t object, NULL if not supported
  */
-pkcs11_dh_t *pkcs11_dh_create(diffie_hellman_group_t group,
-							  chunk_t g, chunk_t p);
+pkcs11_dh_t *pkcs11_dh_create(diffie_hellman_group_t group, ...);
 
 #endif /** PKCS11_DH_H_ @}*/