From edd354db6f28184148c4da1fdd80b099f1bcf1dc Mon Sep 17 00:00:00 2001
From: Martin Willi <martin@strongswan.org>
Date: Mon, 24 Aug 2009 14:00:43 +0200
Subject: [PATCH] added generic implementation helpers for
 private_key_t.equals/belongs_to, public_key_t.equals

---
 .../credentials/keys/private_key.c            | 43 +++++++++++++++++++
 .../credentials/keys/private_key.h            | 24 +++++++++--
 .../credentials/keys/public_key.c             | 24 +++++++++++
 .../credentials/keys/public_key.h             |  9 ++++
 4 files changed, 97 insertions(+), 3 deletions(-)

diff --git a/src/libstrongswan/credentials/keys/private_key.c b/src/libstrongswan/credentials/keys/private_key.c
index 0a01d0385..a334370a4 100644
--- a/src/libstrongswan/credentials/keys/private_key.c
+++ b/src/libstrongswan/credentials/keys/private_key.c
@@ -15,3 +15,46 @@
 
 #include "private_key.h"
 
+/**
+ * See header.
+ */
+bool private_key_equals(private_key_t *this, private_key_t *other)
+{
+	key_encoding_type_t type;
+	chunk_t a, b;
+	
+	if (this == other)
+	{
+		return TRUE;
+	}
+	
+	for (type = 0; type < KEY_ENCODING_MAX; type++)
+	{
+		if (this->get_fingerprint(this, type, &a) &&
+			other->get_fingerprint(other, type, &b))
+		{
+			return chunk_equals(a, b);
+		}
+	}
+	return FALSE;
+}
+
+/**
+ * See header.
+ */
+bool private_key_belongs_to(private_key_t *private, public_key_t *public)
+{
+	key_encoding_type_t type;
+	chunk_t a, b;
+	
+	for (type = 0; type < KEY_ENCODING_MAX; type++)
+	{
+		if (private->get_fingerprint(private, type, &a) &&
+			public->get_fingerprint(public, type, &b))
+		{
+			return chunk_equals(a, b);
+		}
+	}
+	return FALSE;
+}
+
diff --git a/src/libstrongswan/credentials/keys/private_key.h b/src/libstrongswan/credentials/keys/private_key.h
index f38af8ff4..bbc77a8dc 100644
--- a/src/libstrongswan/credentials/keys/private_key.h
+++ b/src/libstrongswan/credentials/keys/private_key.h
@@ -112,9 +112,27 @@ struct private_key_t {
 	private_key_t* (*get_ref)(private_key_t *this);
 		
 	/**
-     * Decrease refcount, destroy private_key if no more references.
-     */
-    void (*destroy)(private_key_t *this);
+	 * Decrease refcount, destroy private_key if no more references.
+	 */
+	void (*destroy)(private_key_t *this);
 };
 
+/**
+ * Generic private key equals() implementation, usable by implementors.
+ *
+ * @param this			first key to compare
+ * @param other			second key to compare
+ * @return				TRUE if this is equal to other
+ */
+bool private_key_equals(private_key_t *this, private_key_t *other);
+
+/**
+ * Generic private key belongs_to() implementation, usable by implementors.
+ *
+ * @param this			first key to compare
+ * @param other			second key to compare
+ * @return				TRUE if this is equal to other
+ */
+bool private_key_belongs_to(private_key_t *private, public_key_t *public);
+
 #endif /** PRIVATE_KEY_H_ @}*/
diff --git a/src/libstrongswan/credentials/keys/public_key.c b/src/libstrongswan/credentials/keys/public_key.c
index a5f547038..4abaf4010 100644
--- a/src/libstrongswan/credentials/keys/public_key.c
+++ b/src/libstrongswan/credentials/keys/public_key.c
@@ -39,6 +39,30 @@ ENUM(signature_scheme_names, SIGN_UNKNOWN, SIGN_ECDSA_521,
 	"ECDSA-521",
 );
 
+/**
+ * See header.
+ */
+bool public_key_equals(public_key_t *this, public_key_t *other)
+{
+	key_encoding_type_t type;
+	chunk_t a, b;
+	
+	if (this == other)
+	{
+		return TRUE;
+	}
+	
+	for (type = 0; type < KEY_ENCODING_MAX; type++)
+	{
+		if (this->get_fingerprint(this, type, &a) &&
+			other->get_fingerprint(other, type, &b))
+		{
+			return chunk_equals(a, b);
+		}
+	}
+	return FALSE;
+}
+
 /*
  * Defined in header.
  */
diff --git a/src/libstrongswan/credentials/keys/public_key.h b/src/libstrongswan/credentials/keys/public_key.h
index be5f3bde6..6cab37d2d 100644
--- a/src/libstrongswan/credentials/keys/public_key.h
+++ b/src/libstrongswan/credentials/keys/public_key.h
@@ -168,6 +168,15 @@ struct public_key_t {
 	void (*destroy)(public_key_t *this);
 };
 
+/**
+ * Generic public key equals() implementation, usable by implementors.
+ *
+ * @param this			first key to compare
+ * @param other			second key to compare
+ * @return				TRUE if this is equal to other
+ */
+bool public_key_equals(public_key_t *this, public_key_t *other);
+
 /**
  * Conversion of ASN.1 signature or hash OID to signature scheme.
  *