/*
* Author: Manoj Ampalam <manoj.ampalam@microsoft.com>
*
* Copyright (c) 2015 Microsoft Corp.
* All rights reserved
*
* Protocol code that talks to public key agent using 
* https://tools.ietf.org/html/rfc4819
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "includes.h"

#include <sys/types.h>
#include <sys/un.h>
#include <sys/socket.h>

#include <fcntl.h>
#include <stdlib.h>
#include <signal.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>

#include "xmalloc.h"
#include "ssh.h"
#include "rsa.h"
#include "sshbuf.h"
#include "sshkey.h"
#include "authfd.h"
#include "cipher.h"
#include "compat.h"
#include "log.h"
#include "atomicio.h"
#include "misc.h"
#include "ssherr.h"
#include "pubkeyfd.h"

#define MAX_AGENT_IDENTITIES	2048		/* Max keys in agent reply */
#define MAX_AGENT_REPLY_LEN	(256 * 1024) 	/* Max bytes in agent reply */

/* macro to check for "agent failure" message */
#define agent_failed(x) \
    ((x == SSH_AGENT_FAILURE) || \
    (x == SSH_COM_AGENT2_FAILURE) || \
    (x == SSH2_AGENT_FAILURE))

int
ssh_request_reply(int , struct sshbuf *, struct sshbuf *);


int	ssh_add_pubkey(int sock, struct sshkey *key, const char *comment, const char* password) {
	struct sshbuf *msg;
	u_char *blob = NULL, *status = NULL, *description = NULL, *lang_tag = NULL;
	size_t blen = 0;
	int r, status_code;

	if ((msg = sshbuf_new()) == NULL)
		return SSH_ERR_ALLOC_FAIL;
	if ((r = sshkey_to_blob(key, &blob, &blen)) != 0)
		goto out;
	
	if ((r = sshbuf_put_cstring(msg, PK_REQUEST_ADD)) != 0 ||
		(r = sshbuf_put_string(msg, blob, blen)) != 0 ||
		(r = sshbuf_put_u32(msg, 1)) != 0 ||
		(r = sshbuf_put_cstring(msg, "comment")) != 0 ||
		(r = sshbuf_put_cstring(msg, comment)) != 0 ||
		(r = sshbuf_put_u8(msg, 1)) != 0)
		goto out;

	if ((r = ssh_request_reply(sock, msg, msg) != 0))
		goto out;



out:
	if (blob)
		free(blob);
	return r;
}

int	ssh_list_pubkeys(int sock, struct ssh_identitylist **idlp) {
	return 0;
}

int	ssh_remove_pubkey(int sock, struct sshkey *key) {
	return 0;
}

int	ssh_remove_pubkey_by_fp(int sock, const char *fingerprint) {
	return 0;
}

int	ssh_remove_all_pubkeys(int sock) {
	return 0;
}