Updated agent plugin to the new builder API

src/libstrongswan/plugins/agent/agent_plugin.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2008 Martin Willi
+ * Copyright (C) 2008-2009 Martin Willi
  * Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -37,7 +37,7 @@ struct private_agent_plugin_t {
 static void destroy(private_agent_plugin_t *this)
 {
 	lib->creds->remove_builder(lib->creds,
-							   (builder_constructor_t)agent_private_key_builder);
+							   (builder_function_t)agent_private_key_open);
 	free(this);
 }
 
@@ -51,7 +51,7 @@ plugin_t *plugin_create()
 	this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
 
 	lib->creds->add_builder(lib->creds, CRED_PRIVATE_KEY, KEY_RSA,
-							(builder_constructor_t)agent_private_key_builder);
+							(builder_function_t)agent_private_key_open);
 	return &this->public.plugin;
 }
 

src/libstrongswan/plugins/agent/agent_private_key.c

@@ -386,12 +386,37 @@ static void destroy(private_agent_private_key_t *this)
 }
 
 /**
- * Internal constructor
+ * See header.
  */
-static agent_private_key_t *agent_private_key_create(char *path,
-													 public_key_t *pubkey)
+agent_private_key_t *agent_private_key_open(key_type_t type, va_list args)
 {
-	private_agent_private_key_t *this = malloc_thing(private_agent_private_key_t);
+	private_agent_private_key_t *this;
+	public_key_t *pubkey = NULL;
+	char *path = NULL;
+
+	while (TRUE)
+	{
+		switch (va_arg(args, builder_part_t))
+		{
+			case BUILD_AGENT_SOCKET:
+				path = va_arg(args, char*);
+				continue;
+			case BUILD_PUBLIC_KEY:
+				pubkey = va_arg(args, public_key_t*);
+				continue;
+			case BUILD_END:
+				break;
+			default:
+				return NULL;
+		}
+		break;
+	}
+	if (!path)
+	{
+		return FALSE;
+	}
+
+	this = malloc_thing(private_agent_private_key_t);
 
 	this->public.interface.get_type = (key_type_t (*)(private_key_t *this))get_type;
 	this->public.interface.sign = (bool (*)(private_key_t *this, signature_scheme_t scheme, chunk_t data, chunk_t *signature))sign;
@@ -422,83 +447,3 @@ static agent_private_key_t *agent_private_key_create(char *path,
 	return &this->public;
 }
 
-typedef struct private_builder_t private_builder_t;
-
-/**
- * Builder implementation for key loading/generation
- */
-struct private_builder_t {
-	/** implements the builder interface */
-	builder_t public;
-	/** agent unix socket */
-	char *socket;
-	/** matching public key */
-	public_key_t *pubkey;
-};
-
-/**
- * Implementation of builder_t.build
- */
-static agent_private_key_t *build(private_builder_t *this)
-{
-	agent_private_key_t *key = NULL;
-
-	if (this->socket)
-	{
-		key = agent_private_key_create(this->socket, this->pubkey);
-	}
-	free(this);
-	return key;
-}
-
-/**
- * Implementation of builder_t.add
- */
-static void add(private_builder_t *this, builder_part_t part, ...)
-{
-	va_list args;
-
-	switch (part)
-	{
-		case BUILD_AGENT_SOCKET:
-		{
-			va_start(args, part);
-			this->socket = va_arg(args, char*);
-			va_end(args);
-			return;
-		}
-		case BUILD_PUBLIC_KEY:
-		{
-			va_start(args, part);
-			this->pubkey = va_arg(args, public_key_t*);
-			va_end(args);
-			return;
-		}
-		default:
-			break;
-	}
-	builder_cancel(&this->public);
-}
-
-/**
- * Builder construction function
- */
-builder_t *agent_private_key_builder(key_type_t type)
-{
-	private_builder_t *this;
-
-	if (type != KEY_RSA)
-	{
-		return NULL;
-	}
-
-	this = malloc_thing(private_builder_t);
-
-	this->pubkey = NULL;
-	this->socket = NULL;
-	this->public.add = (void(*)(builder_t *this, builder_part_t part, ...))add;
-	this->public.build = (void*(*)(builder_t *this))build;
-
-	return &this->public;
-}
-

src/libstrongswan/plugins/agent/agent_private_key.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2008 Martin Willi
+ * Copyright (C) 2008-2009 Martin Willi
  * Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -21,6 +21,7 @@
 #ifndef AGENT_PRIVATE_KEY_H_
 #define AGENT_PRIVATE_KEY_H_
 
+#include <credentials/builder.h>
 #include <credentials/keys/private_key.h>
 
 typedef struct agent_private_key_t agent_private_key_t;
@@ -37,12 +38,16 @@ struct agent_private_key_t {
 };
 
 /**
- * Create the builder for a private key.
+ * Open connection to a private key stored in a SSH agent.
  *
- * @param type		type of the key
- * @return 			builder instance
+ * The function takes BUILD_AGENT_SOCKET and optionally a BUILD_PUBLIC_KEY
+ * to select a specific key loaded in ssh-agent.
+ *
+ * @param type		type of the key, must be KEY_RSA
+ * @param args		builder_part_t argument list
+ * @return 			built key, NULL on failure
  */
-builder_t *agent_private_key_builder(key_type_t type);
+agent_private_key_t *agent_private_key_open(key_type_t type, va_list args);
 
 #endif /** AGENT_PRIVATE_KEY_H_ @}*/