Bug 6322 - Implementation of SHA1 in Asterisk (plus dialplan function to use it)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@9138 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_sha1.c

@@ -0,0 +1,68 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2006, Digium, Inc.
+ * Copyright (C) 2006, Claude Patry
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief SHA1 digest related dialplan functions
+ * 
+ * \author Claude Patry <cpatry@gmail.com>
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "asterisk.h"
+
+/* ASTERISK_FILE_VERSION(__FILE__, "$Revision: 8403 $") */
+
+#include "asterisk/channel.h"
+#include "asterisk/pbx.h"
+#include "asterisk/logger.h"
+#include "asterisk/utils.h"
+#include "asterisk/app.h"
+
+static char *builtin_function_sha1(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len) 
+{
+	if (ast_strlen_zero(data)) {
+		ast_log(LOG_WARNING, "Syntax: SHA1(<data>) - missing argument!\n");
+		return NULL;
+	}
+
+	if (len >= 41)
+		ast_sha1_hash(buf, data);
+	else {
+		ast_log(LOG_ERROR, "Insufficient space to produce SHA1 hash result (%d < 41)\n", len);
+		*buf = '\0';
+	}
+	return buf;
+}
+
+
+#ifndef BUILTIN_FUNC
+static
+#endif
+struct ast_custom_function sha1_function = {
+	.name = "SHA1",
+	.synopsis = "Computes a SHA1 digest",
+	.syntax = "SHA1(<data>)",
+	.read = builtin_function_sha1,
+	.desc = "Generate a SHA1 digest via the SHA1 algorythm.\n"
+	" Example:  Set(sha1hash=${SHA1(junky)})\n"
+	" Sets the asterisk variable sha1hash to the string '60fa5675b9303eb62f99a9cd47f9f5837d18f9a0'\n"
+	" which is known as his hash\n",
+};