openssl: Extract helper function to derive a shared DH secret

2021-01-20 17:53:35 +01:00
parent 86fb24c2c5
commit 5fdc979770
3 changed files with 55 additions and 45 deletions
@@ -36,6 +36,16 @@
 */
 #define EC_FIELD_ELEMENT_LEN(group) ((EC_GROUP_get_degree(group) + 7) / 8)

+/**
+ * Derives a shared DH secret from the given keys.
+ *
+ * @param priv		private key
+ * @param pub		public key
+ * @param shared	shared secret
+ * @return			TRUE on success, FALSE otherwise
+ */
+bool openssl_compute_shared_key(EVP_PKEY *priv, EVP_PKEY *pub, chunk_t *shared);
+
 /**
 * Creates a hash of a given type of a chunk of data.
 *