From: Tobias Brunner <tobias@strongswan.org>
Date: Tue, 29 Oct 2019 10:46:22 +0000 (+0100)
Subject: transform: Add helper to check if transform type negotiates key exchange
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2017420bc41f5c245126d0bf2dba8fdd0f3b9cd9;p=thirdparty%2Fstrongswan.git

transform: Add helper to check if transform type negotiates key exchange
---

diff --git a/src/libstrongswan/crypto/transform.h b/src/libstrongswan/crypto/transform.h
index 4ec4e9b153..6e6594fc21 100644
--- a/src/libstrongswan/crypto/transform.h
+++ b/src/libstrongswan/crypto/transform.h
@@ -65,6 +65,18 @@ extern enum_name_t *transform_type_names;
  */
 enum_name_t *transform_get_enum_names(transform_type_t type);
 
+/**
+ * Check if the given transform type is used to negotiate a key exchange.
+ *
+ * @param type		type of transform to check
+ * @return			TRUE if the transform type negotiates a key exchange
+ */
+static inline bool is_ke_transform(transform_type_t type)
+{
+	return type == KEY_EXCHANGE_METHOD || (ADDITIONAL_KEY_EXCHANGE_1 <= type &&
+										   type <= ADDITIONAL_KEY_EXCHANGE_7);
+}
+
 /**
  * Extended sequence numbers, as in IKEv2 RFC 3.3.2.
  */