Public/Private keys implement a has_fingerprint() method

src/libstrongswan/credentials/keys/key_encoding.h

@@ -72,6 +72,8 @@ enum key_encoding_type_t {
 	/** PGPv4 fingerprint */
 	KEY_ID_PGPV4,
 
+	KEY_ID_MAX,
+
 	/** PKCS#1 and similar ASN.1 key encoding */
 	KEY_PUB_ASN1_DER,
 	KEY_PRIV_ASN1_DER,

src/libstrongswan/credentials/keys/private_key.c

@@ -58,3 +58,22 @@ bool private_key_belongs_to(private_key_t *private, public_key_t *public)
 	return FALSE;
 }
 
+/**
+ * See header.
+ */
+bool private_key_has_fingerprint(private_key_t *private, chunk_t fingerprint)
+{
+	key_encoding_type_t type;
+	chunk_t current;
+
+	for (type = 0; type < KEY_ID_MAX; type++)
+	{
+		if (private->get_fingerprint(private, type, &current) &&
+			chunk_equals(current, fingerprint))
+		{
+			return TRUE;
+		}
+	}
+	return FALSE;
+}
+

src/libstrongswan/credentials/keys/private_key.h

@@ -96,6 +96,14 @@ struct private_key_t {
 	bool (*get_fingerprint)(private_key_t *this, key_encoding_type_t type,
 							chunk_t *fp);
 
+	/**
+	 * Check if a key has a given fingerprint of any kind.
+	 *
+	 * @param fp		fingerprint to check
+	 * @return			TRUE if key has given fingerprint
+	 */
+	bool (*has_fingerprint)(private_key_t *this, chunk_t fp);
+
 	/**
 	 * Get the key in an encoded form as a chunk.
 	 *
@@ -137,4 +145,13 @@ bool private_key_equals(private_key_t *this, private_key_t *other);
  */
 bool private_key_belongs_to(private_key_t *private, public_key_t *public);
 
+/**
+ * Generic private key has_fingerprint() implementation, usable by implementors.
+ *
+ * @param this			key to check fingerprint
+ * @param fp			fingerprint to check
+ * @return				TRUE if key has given fingerprint
+ */
+bool private_key_has_fingerprint(private_key_t *this, chunk_t fingerprint);
+
 #endif /** PRIVATE_KEY_H_ @}*/

src/libstrongswan/credentials/keys/public_key.c

@@ -66,6 +66,25 @@ bool public_key_equals(public_key_t *this, public_key_t *other)
 	return FALSE;
 }
 
+/**
+ * See header.
+ */
+bool public_key_has_fingerprint(public_key_t *public, chunk_t fingerprint)
+{
+	key_encoding_type_t type;
+	chunk_t current;
+
+	for (type = 0; type < KEY_ID_MAX; type++)
+	{
+		if (public->get_fingerprint(public, type, &current) &&
+			chunk_equals(current, fingerprint))
+		{
+			return TRUE;
+		}
+	}
+	return FALSE;
+}
+
 /*
  * Defined in header.
  */

src/libstrongswan/credentials/keys/public_key.h

@@ -154,6 +154,14 @@ struct public_key_t {
 	bool (*get_fingerprint)(public_key_t *this, key_encoding_type_t type,
 							chunk_t *fp);
 
+	/**
+	 * Check if a key has a given fingerprint of any kind.
+	 *
+	 * @param fp		fingerprint to check
+	 * @return			TRUE if key has given fingerprint
+	 */
+	bool (*has_fingerprint)(public_key_t *this, chunk_t fp);
+
 	/**
 	 * Get the key in an encoded form as a chunk.
 	 *
@@ -186,6 +194,15 @@ struct public_key_t {
  */
 bool public_key_equals(public_key_t *this, public_key_t *other);
 
+/**
+ * Generic public key has_fingerprint() implementation, usable by implementors.
+ *
+ * @param this			key to check fingerprint
+ * @param fp			fingerprint to check
+ * @return				TRUE if key has given fingerprint
+ */
+bool public_key_has_fingerprint(public_key_t *this, chunk_t fingerprint);
+
 /**
  * Conversion of ASN.1 signature or hash OID to signature scheme.
  *