Fix a few issues in the previous (disabled) HTTPS code,

and support linux as well (using fopencookie(), which should
be available in glibc).

Update configure.ac to check for funopen (BSD) and fopencookie(glibc),
and while we are at it also for gethostbyname_r
(the generated files need to be updated, or you need
to run bootstrap.sh yourself).

Document the new options in http.conf.sample
(names are only tentative, better ones are welcome).

At this point we can safely enable the option.
Anyone willing to try this on Sun and Apple platforms ?



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@45892 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/http.conf.sample

@@ -4,7 +4,8 @@
 ;
 [general]
 ;
-; Whether HTTP interface is enabled or not.  Default is no.
+; Whether HTTP/HTTPS interface is enabled or not.  Default is no.
+; This also affects manager/rawman/mxml access (see manager.conf)
 ;
 ;enabled=yes
 ;
@@ -13,16 +14,26 @@
 ;
 ;enablestatic=yes
 ;
-; Address to bind to.  Default is 0.0.0.0
+; Address to bind to, both for HTTP and HTTPS.  Default is 0.0.0.0
 ;
 bindaddr=127.0.0.1
 ;
-; Port to bind to (default is 8088)
+; Port to bind to for HTTP sessions (default is 8088)
 ;
-bindport=8088
+;bindport=8088
 ;
 ; Prefix allows you to specify a prefix for all requests
 ; to the server.  The default is "asterisk" so that all
 ; requests must begin with /asterisk
 ;
 ;prefix=asterisk
+
+; HTTPS support: you need to enable it, define the port to use,
+; and have a certificate somewhere.
+; sslenable=yes		; enable ssl - default no.
+; sslbindport=4433	; port to use - default is 8089
+; sslcert=/tmp/foo.pem	; path to the certificate
+;
+; To produce a certificate you can e.g. use openssl
+;	openssl req -new -x509 -days 365 -nodes -out /tmp/foo.pem -keyout /tmp/foo.pem
+;

configure.ac

@@ -251,6 +251,13 @@ AC_FUNC_UTIME_NULL
 AC_FUNC_VPRINTF
 AC_CHECK_FUNCS([asprintf atexit bzero dup2 endpwent floor ftruncate getcwd gethostbyname gethostname getloadavg gettimeofday inet_ntoa isascii localtime_r memchr memmove memset mkdir munmap pow putenv re_comp regcomp rint select setenv socket sqrt strcasecmp strcasestr strchr strcspn strdup strerror strncasecmp strndup strnlen strrchr strsep strspn strstr strtol strtoq unsetenv utime vasprintf])
 
+# https support (in main/http.c) uses funopen on BSD systems,
+# fopencookie on linux
+AC_CHECK_FUNCS([funopen fopencookie])
+
+# some systems already have gethostbyname_r so we don't need to build ours in main/utils.c
+AC_CHECK_FUNCS([gethostbyname_r])
+
 AC_MSG_CHECKING(for compiler atomic operations)
 AC_LINK_IFELSE(
 AC_LANG_PROGRAM([], [int foo1; int foo2 = __sync_fetch_and_add(&foo1, 1);]),

main/Makefile

@@ -37,6 +37,8 @@ OBJS+=stdtime/localtime.o
 # by a module.
 OBJS+=say.o
 
+AST_LIBS += $(SSL_LIB)
+
 ifeq ($(wildcard /usr/include/sys/poll.h),)
   OBJS+=poll.o
   ASTCFLAGS+=-DPOLLCOMPAT

main/http.c

@@ -64,8 +64,8 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  * We declare most of ssl support variables unconditionally,
  * because their number is small and this simplifies the code.
  */
-#ifdef HAVE_OPENSSL
-// #define	DO_SSL	/* comment in/out if you want to support ssl */
+#if defined(HAVE_OPENSSL) && (defined(HAVE_FUNOPEN) || defined(HAVE_FOPENCOOKIE))
+#define	DO_SSL	/* comment in/out if you want to support ssl */
 #endif
 
 #ifdef DO_SSL
@@ -428,30 +428,36 @@ static char *handle_uri(struct sockaddr_in *sin, char *uri, int *status, char **
 }
 
 #ifdef DO_SSL
+#if defined(HAVE_FUNOPEN)
+#define HOOK_T int
+#define LEN_T int
+#else
+#define HOOK_T ssize_t
+#define LEN_T size_t
+#endif
 /*!
  * replacement read/write functions for SSL support.
  * We use wrappers rather than SSL_read/SSL_write directly so
  * we can put in some debugging.
  */
-static int ssl_read(void *cookie, char *buf, int len)
+static HOOK_T ssl_read(void *cookie, char *buf, LEN_T len)
 {
-	int i;
-	i = SSL_read(cookie, buf, len-1);
+	int i = SSL_read(cookie, buf, len-1);
 #if 0
 	if (i >= 0)
 		buf[i] = '\0';
-	ast_verbose("ssl read size %d returns %d <%s>\n", len, i, buf);
+	ast_verbose("ssl read size %d returns %d <%s>\n", (int)len, i, buf);
 #endif
 	return i;
 }
 
-static int ssl_write(void *cookie, const char *buf, int len)
+static HOOK_T ssl_write(void *cookie, const char *buf, LEN_T len)
 {
 #if 0
 	char *s = alloca(len+1);
 	strncpy(s, buf, len);
 	s[len] = '\0';
-	ast_verbose("ssl write size %d <%s>\n", len, s);
+	ast_verbose("ssl write size %d <%s>\n", (int)len, s);
 #endif
 	return SSL_write(cookie, buf, len);
 }
@@ -463,7 +469,7 @@ static int ssl_close(void *cookie)
 	SSL_free(cookie);
 	return 0;
 }
-#endif
+#endif	/* DO_SSL */
 
 static void *ast_httpd_helper_thread(void *data)
 {
@@ -474,24 +480,38 @@ static void *ast_httpd_helper_thread(void *data)
 	char *uri, *c, *title=NULL;
 	int status = 200, contentlength = 0;
 
+	/*
+	 * open a FILE * as appropriate.
+	 */
+	if (!ser->is_ssl)
+		ser->f = fdopen(ser->fd, "w+");
 #ifdef DO_SSL
-	if (ser->is_ssl) {
-		ser->ssl = SSL_new(ssl_ctx);
+	else if ( (ser->ssl = SSL_new(ssl_ctx)) ) {
 		SSL_set_fd(ser->ssl, ser->fd);
-		if (SSL_accept(ser->ssl) == 0) {
+		if (SSL_accept(ser->ssl) == 0)
 			ast_verbose(" error setting up ssl connection");
-			goto done;
-		}
-		ser->f = funopen(ser->ssl, ssl_read, ssl_write, NULL, ssl_close);
-	} else
+		else {
+#if defined(HAVE_FUNOPEN)	/* the BSD interface */
+			ser->f = funopen(ser->ssl, ssl_read, ssl_write, NULL, ssl_close);
+
+#elif defined(HAVE_FOPENCOOKIE)	/* the glibc/linux interface */
+			static const cookie_io_functions_t cookie_funcs = {
+				ssl_read, ssl_write, NULL, ssl_close
+			};
+			ser->f = fopencookie(ser->ssl, "w+", cookie_funcs);
+#else
+			/* could add other methods here */
 #endif
-	ser->f = fdopen(ser->fd, "w+");
+		}
+		if (!ser->f)	/* no success opening descriptor stacking */
+			SSL_free(ser->ssl);
+	}
+#endif /* DO_SSL */
 
 	if (!ser->f) {
-		ast_log(LOG_WARNING, "fdopen/funopen failed!\n");
 		close(ser->fd);
-		free(ser);
-		return NULL;
+		ast_log(LOG_WARNING, "FILE * open failed!\n");
+		goto done;
 	}
 
 	if (!fgets(buf, sizeof(buf), ser->f))
@@ -605,7 +625,8 @@ static void *ast_httpd_helper_thread(void *data)
 		free(title);
 
 done:
-	fclose(ser->f);
+	if (ser->f)
+		fclose(ser->f);
 	free(ser);
 	return NULL;
 }