Add OEJ's md5 app (bug #3604)

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@5048 f38db490-d61c-443f-a65b-d21fe96a405b

5 files changed, 113 insertions, 23 deletions

diff --git a/apps/Makefile b/apps/Makefile
index a8a4e3b62..7b527d343 100755
--- a/apps/Makefile
+++ b/apps/Makefile
@@ -30,7 +30,8 @@ APPS=app_dial.so app_playback.so app_voicemail.so app_directory.so app_mp3.so\
      app_groupcount.so app_txtcidname.so app_controlplayback.so \
      app_talkdetect.so app_alarmreceiver.so app_userevent.so app_verbose.so \
      app_test.so app_forkcdr.so app_math.so app_realtime.so \
-     app_dumpchan.so app_waitforsilence.so app_while.so app_setrdnis.so
+     app_dumpchan.so app_waitforsilence.so app_while.so app_setrdnis.so \
+     app_md5.so
 
 ifneq (${OSARCH},Darwin)
 ifneq (${OSARCH},SunOS)
diff --git a/apps/app_md5.c b/apps/app_md5.c
new file mode 100755
index 000000000..1be840aed
--- /dev/null
+++ b/apps/app_md5.c
@@ -0,0 +1,86 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * MD5 checksum application
+ * 
+ * Copyright (C) 2005, Olle E. Johansson, Edvina.net
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/utils.h>
+#include <asterisk/channel.h>
+#include <asterisk/pbx.h>
+#include <asterisk/module.h>
+#include <asterisk/lock.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+static char *tdesc = "MD5 checksum application";
+static char *app_md5 = "md5";
+static char *synopsis = 
+"  md5(<var>=<string>): Calculates a MD5 checksum on <string>.\n"
+"Returns hash value in a channel variable. Always return 0\n";
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+static int md5_exec(struct ast_channel *chan, void *data)
+{
+	int res=0;
+	struct localuser *u;
+	char *varname= NULL; /* Variable to set */
+	char *string = NULL; /* String to calculate on */
+	char retvar[50]; /* Return value */
+
+	if (!data) {
+		ast_log(LOG_WARNING, "Syntax: md5(<varname>=<string>) - missing argument!\n");
+		return -1;
+	}
+	LOCAL_USER_ADD(u);
+	memset(retvar,0, sizeof(retvar));
+	string = ast_strdupa(data);
+	varname = strsep(&string,"=");
+	if (ast_strlen_zero(varname)) {
+		ast_log(LOG_WARNING, "Syntax: md5(<varname>=<string>) - missing argument!\n");
+		LOCAL_USER_REMOVE(u);
+		return -1;
+	}
+	ast_md5_hash(retvar, string);
+	pbx_builtin_setvar_helper(chan, varname, retvar);
+	LOCAL_USER_REMOVE(u);
+	return res;
+}
+
+int unload_module(void)
+{
+	STANDARD_HANGUP_LOCALUSERS;
+	return ast_unregister_application(app_md5);
+}
+
+int load_module(void)
+{
+	return ast_register_application(app_md5, md5_exec, synopsis, tdesc);
+}
+
+char *description(void)
+{
+	return tdesc;
+}
+
+int usecount(void)
+{
+	int res;
+	STANDARD_USECOUNT(res);
+	return res;
+}
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 5e21641e6..9a8ad83c9 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -31,7 +31,6 @@
 #include <asterisk/manager.h>
 #include <asterisk/callerid.h>
 #include <asterisk/cli.h>
-#include <asterisk/md5.h>
 #include <asterisk/app.h>
 #include <asterisk/musiconhold.h>
 #include <asterisk/dsp.h>
@@ -4966,21 +4965,6 @@ static void build_route(struct sip_pvt *p, struct sip_request *req, int backward
 		list_route(p->route);
 }
 
-/*--- md5_hash: Produce MD5 hash of value. Used for authentication ---*/
-static void md5_hash(char *output, char *input)
-{
-		struct MD5Context md5;
-		unsigned char digest[16];
-		char *ptr;
-		int x;
-		MD5Init(&md5);
-		MD5Update(&md5, input, strlen(input));
-		MD5Final(digest, &md5);
-		ptr = output;
-		for (x=0;x<16;x++)
-			ptr += sprintf(ptr, "%2.2x", digest[x]);
-}
-
 /*--- check_auth: Check user authorization from peer definition ---*/
 /*      Some actions, like REGISTER and INVITEs from peers require
         authentication (if peer have secret set) */
@@ -5114,10 +5098,10 @@ static int check_auth(struct sip_pvt *p, struct sip_request *req, char *randdata
 		if (!ast_strlen_zero(md5secret))
 		        snprintf(a1_hash, sizeof(a1_hash), "%s", md5secret);
 		else
-		        md5_hash(a1_hash, a1);
-		md5_hash(a2_hash, a2);
+		        ast_md5_hash(a1_hash, a1);
+		ast_md5_hash(a2_hash, a2);
 		snprintf(resp, sizeof(resp), "%s:%s:%s", a1_hash, randdata, a2_hash);
-		md5_hash(resp_hash, resp);
+		ast_md5_hash(resp_hash, resp);
 
 		/* resp_hash now has the expected response, compare the two */
 
@@ -7107,15 +7091,15 @@ static int build_reply_digest(struct sip_pvt *p, char* orig_header, char* digest
 	if (!ast_strlen_zero(p->peermd5secret))
 	        strncpy(a1_hash, p->peermd5secret, sizeof(a1_hash) - 1);
 	else
-	        md5_hash(a1_hash,a1);
-	md5_hash(a2_hash,a2);
+	        ast_md5_hash(a1_hash,a1);
+	ast_md5_hash(a2_hash,a2);
 	/* XXX We hard code the nonce-number to 1... What are the odds? Are we seriously going to keep
 	       track of every nonce we've seen? Also we hard code to "auth"...  XXX */
 	if (!ast_strlen_zero(p->qop))
 		snprintf(resp,sizeof(resp),"%s:%s:%s:%s:%s:%s",a1_hash,p->nonce, "00000001", cnonce, "auth", a2_hash);
 	else
 		snprintf(resp,sizeof(resp),"%s:%s:%s",a1_hash,p->nonce,a2_hash);
-	md5_hash(resp_hash,resp);
+	ast_md5_hash(resp_hash,resp);
 	/* XXX We hard code our qop to "auth" for now.  XXX */
 	if (!ast_strlen_zero(p->qop))
 		snprintf(digest,digest_len,"Digest username=\"%s\", realm=\"%s\", algorithm=MD5, uri=\"%s\", nonce=\"%s\", response=\"%s\", opaque=\"%s\", qop=\"%s\", cnonce=\"%s\", nc=%s",p->authname,p->realm,uri,p->nonce,resp_hash, p->opaque, "auth", cnonce, "00000001");
diff --git a/include/asterisk/utils.h b/include/asterisk/utils.h
index c9b971735..6e3a7d5db 100755
--- a/include/asterisk/utils.h
+++ b/include/asterisk/utils.h
@@ -127,10 +127,13 @@ struct ast_hostent {
 
 extern char *ast_strip(char *buf);
 extern struct hostent *ast_gethostbyname(const char *host, struct ast_hostent *hp);
+/* ast_md5_hash: Produces MD5 hash based on input string */
+extern void ast_md5_hash(char *output, char *input);
 extern int ast_base64encode(char *dst, unsigned char *src, int srclen, int max);
 extern int ast_base64decode(unsigned char *dst, char *src, int max);
 
 extern int test_for_thread_safety(void);
+
 extern const char *ast_inet_ntoa(char *buf, int bufsiz, struct in_addr ia);
 extern int ast_utils_init(void);
 
diff --git a/utils.c b/utils.c
index 685a66aa1..0d7a8781c 100755
--- a/utils.c
+++ b/utils.c
@@ -25,6 +25,7 @@
 #include <asterisk/lock.h>
 #include <asterisk/utils.h>
 #include <asterisk/logger.h>
+#include <asterisk/md5.h>
 
 static char base64[64];
 static char b2a[256];
@@ -245,6 +246,21 @@ int test_for_thread_safety(void)
 	return(test_errors);          /* return 0 on success. */
 }
 
+/*--- ast_md5_hash: Produce 16 char MD5 hash of value. ---*/
+void ast_md5_hash(char *output, char *input)
+{
+		struct MD5Context md5;
+		unsigned char digest[16];
+		char *ptr;
+		int x;
+		MD5Init(&md5);
+		MD5Update(&md5, input, strlen(input));
+		MD5Final(digest, &md5);
+		ptr = output;
+		for (x=0;x<16;x++)
+			ptr += sprintf(ptr, "%2.2x", digest[x]);
+}
+
 int ast_base64decode(unsigned char *dst, char *src, int max)
 {
 	int cnt = 0;