major re-work of dialplan functions, including:

- locking of functions list during registration/unregistration/searching
 - rename of function description structure to be consistent with the rest of the API
 - addition of 'desc' element to description structure, for detailed description (like applications)
 - addition of 'show function' CLI command to show function details
 - conversion of existing functions to use uppercase names to match policy
 - creation of new 'pbx_functions.so' module to contain standard 'builtin' functions
 - removal of all builtin functions from pbx.c and apps and placement into new 'funcs' directory


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5583 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_md5.c

@@ -0,0 +1,86 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * MD5 digest related dialplan functions
+ * 
+ * Copyright (C) 2005, Digium, Inc.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "asterisk/channel.h"
+#include "asterisk/pbx.h"
+#include "asterisk/logger.h"
+#include "asterisk/utils.h"
+#include "asterisk/app.h"
+
+static char *builtin_function_md5(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len) 
+{
+	char md5[33];
+
+	if (!data || ast_strlen_zero(data)) {
+		ast_log(LOG_WARNING, "Syntax: MD5(<data>) - missing argument!\n");
+		return NULL;
+	}
+
+	ast_md5_hash(md5, data);
+	ast_copy_string(buf, md5, len);
+	
+	return buf;
+}
+
+static char *builtin_function_checkmd5(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len) 
+{
+	int argc;
+	char *argv[2];
+	char *args;
+	char newmd5[33];
+
+	if (!data || ast_strlen_zero(data)) {
+		ast_log(LOG_WARNING, "Syntax: CHECK_MD5(<digest>,<data>) - missing argument!\n");
+		return NULL;
+	}
+
+	args = ast_strdupa(data);	
+	argc = ast_separate_app_args(args, '|', argv, sizeof(argv) / sizeof(argv[0]));
+
+	if (argc < 2) {
+		ast_log(LOG_WARNING, "Syntax: CHECK_MD5(<digest>,<data>) - missing argument!\n");
+		return NULL;
+	}
+
+	ast_md5_hash(newmd5, argv[1]);
+
+	if (!strcasecmp(newmd5, argv[0]))	/* they match */
+		ast_copy_string(buf, "1", len);
+	else
+		ast_copy_string(buf, "0", len);
+	
+	return buf;
+}
+
+#ifndef BUILTIN_FUNC
+static
+#endif
+struct ast_custom_function md5_function = {
+	.name = "MD5",
+	.synopsis = "Computes an MD5 digest",
+	.syntax = "MD5(<data>)",
+	.read = builtin_function_md5,
+};
+
+#ifndef BUILTIN_FUNC
+static
+#endif
+struct ast_custom_function checkmd5_function = {
+	.name = "CHECK_MD5",
+	.synopsis = "Checks an MD5 digest",
+	.desc = "Returns 1 on a match, 0 otherwise\n",
+	.syntax = "CHECK_MD5(<digest>,<data>)",
+	.read = builtin_function_checkmd5,
+};