use credential builder API to parse trusted public keys

src/libstrongswan/plugins/pubkey/pubkey_cert.c

@@ -87,7 +87,7 @@ static id_match_t has_subject(private_pubkey_cert_t *this,
 	{
 		return id->matches(id, subject);
 	}
-	return ID_MATCH_NONE;	
+	return ID_MATCH_NONE;
 }
 
 /**
@@ -214,13 +214,6 @@ static pubkey_cert_t *pubkey_cert_create(public_key_t *key)
 	return &this->public;
 }
 
-static pubkey_cert_t *pubkey_cert_create_from_chunk(chunk_t blob)
-{
-	public_key_t *key = pubkey_public_key_load(chunk_clone(blob));
-
-	return (key)? pubkey_cert_create(key) : NULL;
-}
-
 typedef struct private_builder_t private_builder_t;
 /**
  * Builder implementation for key loading
@@ -250,21 +243,28 @@ static void add(private_builder_t *this, builder_part_t part, ...)
 {
 	if (!this->key)
 	{
+		public_key_t *key;
 		va_list args;
-	
+		
 		switch (part)
 		{
 			case BUILD_BLOB_ASN1_DER:
 			{
 				va_start(args, part);
-				this->key = pubkey_cert_create_from_chunk(va_arg(args, chunk_t));
+				key = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_ANY,
+										 va_arg(args, chunk_t));
+				if (key)
+				{
+					this->key = pubkey_cert_create(key);
+				}
 				va_end(args);
 				return;
 			}
 			case BUILD_PUBLIC_KEY:
 			{
 				va_start(args, part);
-				this->key = pubkey_cert_create(va_arg(args, public_key_t*));
+				key = va_arg(args, public_key_t*);
+				pubkey_cert_create(key->get_ref(key));
 				va_end(args);
 				return;
 			}