/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*  GMime
 *  Copyright (C) 2000-2007 Jeffrey Stedfast
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>

#include <gmime/gmime.h>

#include "testsuite.h"

extern int verbose;

#define v(x) if (verbose > 3) x


typedef struct _TestSession TestSession;
typedef struct _TestSessionClass TestSessionClass;

struct _TestSession {
	GMimeSession parent_object;
	
};

struct _TestSessionClass {
	GMimeSessionClass parent_class;
	
};

static void test_session_class_init (TestSessionClass *klass);

static char *request_passwd (GMimeSession *session, const char *prompt,
			     gboolean secret, const char *item,
			     GError **err);


static GMimeSessionClass *parent_class = NULL;


static GType
test_session_get_type (void)
{
	static GType type = 0;
	
	if (!type) {
		static const GTypeInfo info = {
			sizeof (TestSessionClass),
			NULL, /* base_class_init */
			NULL, /* base_class_finalize */
			(GClassInitFunc) test_session_class_init,
			NULL, /* class_finalize */
			NULL, /* class_data */
			sizeof (TestSession),
			0,    /* n_preallocs */
			NULL, /* object_init */
		};
		
		type = g_type_register_static (GMIME_TYPE_SESSION, "TestSession", &info, 0);
	}
	
	return type;
}


static void
test_session_class_init (TestSessionClass *klass)
{
	GMimeSessionClass *session_class = GMIME_SESSION_CLASS (klass);
	
	parent_class = g_type_class_ref (GMIME_TYPE_SESSION);
	
	session_class->request_passwd = request_passwd;
}


static char *
request_passwd (GMimeSession *session, const char *prompt, gboolean secret, const char *item, GError **err)
{
	return g_strdup ("no.secret");
}



static void
test_sign (GMimeCipherContext *ctx, GMimeStream *cleartext, GMimeStream *ciphertext)
{
	GError *err = NULL;
	Exception *ex;
	
	g_mime_cipher_sign (ctx, "no.user@no.domain",
			    GMIME_CIPHER_HASH_DEFAULT,
			    cleartext, ciphertext, &err);
	
	if (err != NULL) {
		ex = exception_new ("%s", err->message);
		g_error_free (err);
		throw (ex);
	}
	
	v(fprintf (stderr, "signature:\n%.*s\n",
		   GMIME_STREAM_MEM (ciphertext)->buffer->len,
		   GMIME_STREAM_MEM (ciphertext)->buffer->data));
}

static void
test_verify (GMimeCipherContext *ctx, GMimeStream *cleartext, GMimeStream *ciphertext)
{
	GMimeSignatureValidity *validity;
	GError *err = NULL;
	Exception *ex;
	
	validity = g_mime_cipher_verify (ctx, GMIME_CIPHER_HASH_DEFAULT,
					 cleartext, ciphertext, &err);
	
	if (validity == NULL) {
		ex = exception_new ("%s", err->message);
		g_error_free (err);
		throw (ex);
	}
	
	if (validity->status != GMIME_SIGNATURE_STATUS_GOOD) {
		g_mime_signature_validity_free (validity);
		throw (exception_new ("signature BAD"));
	}
	
	g_mime_signature_validity_free (validity);
}

static void
test_encrypt (GMimeCipherContext *ctx, GMimeStream *cleartext, GMimeStream *ciphertext)
{
	GPtrArray *recipients;
	GError *err = NULL;
	Exception *ex;
	
	recipients = g_ptr_array_new ();
	g_ptr_array_add (recipients, "no.user@no.domain");
	
	g_mime_cipher_encrypt (ctx, FALSE, "no.user@no.domain", recipients,
			       cleartext, ciphertext, &err);
	
	g_ptr_array_free (recipients, TRUE);
	
	if (err != NULL) {
		ex = exception_new ("%s", err->message);
		g_error_free (err);
		throw (ex);
	}
	
	v(fprintf (stderr, "ciphertext:\n%.*s\n",
		   GMIME_STREAM_MEM (ciphertext)->buffer->len,
		   GMIME_STREAM_MEM (ciphertext)->buffer->data));
}

static void
test_decrypt (GMimeCipherContext *ctx, GMimeStream *cleartext, GMimeStream *ciphertext)
{
	Exception *ex = NULL;
	GMimeStream *stream;
	GError *err = NULL;
	GByteArray *buf[2];
	
	stream = g_mime_stream_mem_new ();
	
	g_mime_cipher_decrypt (ctx, ciphertext, stream, &err);
	
	if (err != NULL) {
		g_object_unref (stream);
		ex = exception_new ("%s", err->message);
		g_error_free (err);
		throw (ex);
	}
	
	buf[0] = GMIME_STREAM_MEM (cleartext)->buffer;
	buf[1] = GMIME_STREAM_MEM (stream)->buffer;
	
	if (buf[0]->len != buf[1]->len || memcmp (buf[0]->data, buf[1]->data, buf[0]->len) != 0)
		ex = exception_new ("decrypted data does not match original cleartext");
	
	g_object_unref (stream);
	
	if (ex != NULL)
		throw (ex);
}

static void
test_export (GMimeCipherContext *ctx, const char *path)
{
	GMimeStream *istream, *ostream;
	Exception *ex = NULL;
	GByteArray *buf[2];
	GError *err = NULL;
	GPtrArray *keys;
	int fd;
	
	if ((fd = open (path, O_RDONLY)) == -1)
		throw (exception_new ("open() failed: %s", strerror (errno)));
	
	ostream = g_mime_stream_fs_new (fd);
	istream = g_mime_stream_mem_new ();
	g_mime_stream_write_to_stream (ostream, istream);
	g_mime_stream_reset (istream);
	g_object_unref (ostream);
	
	keys = g_ptr_array_new ();
	g_ptr_array_add (keys, "no.user@no.domain");
	
	ostream = g_mime_stream_mem_new ();
	
	g_mime_cipher_export_keys (ctx, keys, ostream, &err);
	g_ptr_array_free (keys, TRUE);
	if (err != NULL) {
		ex = exception_new ("%s", err->message);
		g_object_unref (istream);
		g_object_unref (ostream);
		g_error_free (err);
		throw (ex);
	}
	
	buf[0] = GMIME_STREAM_MEM (istream)->buffer;
	buf[1] = GMIME_STREAM_MEM (ostream)->buffer;
	
	if (buf[0]->len != buf[1]->len || memcmp (buf[0]->data, buf[1]->data, buf[0]->len) != 0)
		ex = exception_new ("exported key does not match original key");
	
	g_object_unref (istream);
	g_object_unref (ostream);
	
	if (ex != NULL)
		throw (ex);
}

static void
import_key (GMimeCipherContext *ctx, const char *path)
{
	GMimeStream *stream;
	GError *err = NULL;
	Exception *ex;
	int fd;
	
	if ((fd = open (path, O_RDONLY)) == -1)
		throw (exception_new ("open() failed: %s", strerror (errno)));
	
	stream = g_mime_stream_fs_new (fd);
	g_mime_cipher_import_keys (ctx, stream, &err);
	g_object_unref (stream);
	
	if (err != NULL) {
		ex = exception_new ("%s", err->message);
		g_error_free (err);
		throw (ex);
	}
}


int main (int argc, char **argv)
{
	const char *datadir = "data/pgp";
	GMimeStream *istream, *ostream;
	GMimeCipherContext *ctx;
	GMimeSession *session;
	const char *what;
	struct stat st;
	char *key;
	int i;
	
	g_mime_init (0);
	
	testsuite_init (argc, argv);
	
	/* reset .gnupg config directory */
	system ("/bin/rm -rf ./tmp");
	system ("/bin/mkdir ./tmp");
	setenv ("GNUPGHOME", "./tmp/.gnupg", 1);
	system ("/usr/bin/gpg --list-keys > /dev/null 2>&1");
	
	for (i = 1; i < argc; i++) {
		if (argv[i][0] != '-') {
			datadir = argv[i];
			break;
		}
	}
	
	if (i < argc && (stat (datadir, &st) == -1 || !S_ISDIR (st.st_mode)))
		return EXIT_FAILURE;
	
	testsuite_start ("GnuPG cipher context");
	
	session = g_object_new (test_session_get_type (), NULL);
	
	ctx = g_mime_gpg_context_new (session, "/usr/bin/gpg");
	g_mime_gpg_context_set_always_trust ((GMimeGpgContext *) ctx, TRUE);
	
	testsuite_check ("GMimeGpgContext::import");
	try {
		key = g_build_filename (datadir, "gmime.gpg.pub", NULL);
		import_key (ctx, key);
		g_free (key);
		
		key = g_build_filename (datadir, "gmime.gpg.sec", NULL);
		import_key (ctx, key);
		g_free (key);
		
		testsuite_check_passed ();
	} catch (ex) {
		testsuite_check_failed ("GMimeGpgContext::import failed: %s", ex->message);
		return EXIT_FAILURE;
	} finally;
	
	key = g_build_filename (datadir, "gmime.gpg.pub", NULL);
	testsuite_check ("GMimeGpgContext::export");
	try {
		test_export (ctx, key);
		testsuite_check_passed ();
	} catch (ex) {
		testsuite_check_failed ("GMimeGpgContext::export failed: %s", ex->message);
	} finally;
	
	g_free (key);
	
	istream = g_mime_stream_mem_new ();
	ostream = g_mime_stream_mem_new ();
	
	g_mime_stream_write_string (istream, "this is some cleartext\r\n");
	g_mime_stream_reset (istream);
	
	what = "GMimeGpgContext::sign";
	testsuite_check (what);
	try {
		test_sign (ctx, istream, ostream);
		testsuite_check_passed ();
		
		what = "GMimeGpgContext::verify";
		testsuite_check (what);
		g_mime_stream_reset (istream);
		g_mime_stream_reset (ostream);
		test_verify (ctx, istream, ostream);
		testsuite_check_passed ();
	} catch (ex) {
		testsuite_check_failed ("%s failed: %s", what, ex->message);
	} finally;
	
	g_object_unref (ostream);
	g_mime_stream_reset (istream);
	ostream = g_mime_stream_mem_new ();
	
	what = "GMimeGpgContext::encrypt";
	testsuite_check (what);
	try {
		test_encrypt (ctx, istream, ostream);
		testsuite_check_passed ();
		
		what = "GMimeGpgContext::decrypt";
		testsuite_check (what);
		g_mime_stream_reset (istream);
		g_mime_stream_reset (ostream);
		test_decrypt (ctx, istream, ostream);
		testsuite_check_passed ();
	} catch (ex) {
		testsuite_check_failed ("%s failed: %s", what, ex->message);
	} finally;
	
	g_object_unref (session);
	g_object_unref (istream);
	g_object_unref (ostream);
	g_object_unref (ctx);
	
	testsuite_end ();
	
	g_mime_shutdown ();
	
	system ("/bin/rm -rf ./tmp");
	
	return testsuite_exit ();
}