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authorDenys Vlasenko <vda.linux@googlemail.com>2015-10-07 02:40:53 +0200
committerDenys Vlasenko <vda.linux@googlemail.com>2015-10-07 02:40:53 +0200
commit2007ef5c3cd351ab15b9cb70dd65bf9105403822 (patch)
tree7936f2f590af7fc9c69e66827a20c92d479eaf57 /networking
parent4271698fea42a51e48a5d761e8c00a5fd57661de (diff)
downloadbusybox-2007ef5c3cd351ab15b9cb70dd65bf9105403822.tar.gz
wget: make it possible to have both SSL helpers configured
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking')
-rw-r--r--networking/wget.c76
1 files changed, 53 insertions, 23 deletions
diff --git a/networking/wget.c b/networking/wget.c
index baa7e0e78..d4a9c0cb1 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -51,10 +51,10 @@
//config: FEATURE_WGET_LONG_OPTIONS is also enabled, the --timeout option
//config: will work in addition to -T.
//config:
-//config:choice
-//config: prompt "Choose how to handle https:// URLs"
+//config:config FEATURE_WGET_OPENSSL
+//config: bool "Try to connect to HTTPS using openssl"
+//config: default y
//config: depends on WGET
-//config: default FEATURE_WGET_OPENSSL
//config: help
//config: Choose how wget establishes SSL connection for https:// URLs.
//config:
@@ -74,19 +74,24 @@
//config: openssl is also a big binary, often dynamically linked
//config: against ~15 libraries.
//config:
+//config:config FEATURE_WGET_SSL_HELPER
+//config: bool "Try to connect to HTTPS using ssl_helper"
+//config: default y
+//config: depends on WGET
+//config: help
+//config: Choose how wget establishes SSL connection for https:// URLs.
+//config:
+//config: Busybox itself contains no SSL code. wget will spawn
+//config: a helper program to talk over HTTPS.
+//config:
//config: ssl_helper is a tool which can be built statically
//config: from busybox sources against a small embedded SSL library.
//config: Please see networking/ssl_helper/README.
//config: It does not require double host resolution and emits
//config: error messages to stderr.
//config:
-//config:config FEATURE_WGET_OPENSSL
-//config: bool "openssl"
-//config:
-//config:config FEATURE_WGET_SSL_HELPER
-//config: bool "ssl_helper"
-//config:
-//config:endchoice
+//config: Precompiled static binary may be available at
+//config: http://busybox.net/downloads/binaries/
//applet:IF_WGET(APPLET(wget, BB_DIR_USR_BIN, BB_SUID_DROP))
@@ -604,11 +609,12 @@ static FILE* prepare_ftp_session(FILE **dfpp, struct host_info *target, len_and_
}
#if ENABLE_FEATURE_WGET_OPENSSL
-static int spawn_https_helper(const char *host, unsigned port)
+static int spawn_https_helper_openssl(const char *host, unsigned port)
{
char *allocated = NULL;
int sp[2];
int pid;
+ IF_FEATURE_WGET_SSL_HELPER(volatile int child_failed = 0;)
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sp) != 0)
/* Kernel can have AF_UNIX support disabled */
@@ -617,7 +623,8 @@ static int spawn_https_helper(const char *host, unsigned port)
if (!strchr(host, ':'))
host = allocated = xasprintf("%s:%u", host, port);
- pid = BB_MMU ? xfork() : xvfork();
+ fflush_all();
+ pid = xvfork();
if (pid == 0) {
/* Child */
char *argv[6];
@@ -626,10 +633,6 @@ static int spawn_https_helper(const char *host, unsigned port)
xmove_fd(sp[1], 0);
xdup2(0, 1);
/*
- * TODO: develop a tiny ssl/tls helper (using matrixssl?),
- * try to exec it here before falling back to big fat openssl.
- */
- /*
* openssl s_client -quiet -connect www.kernel.org:443 2>/dev/null
* It prints some debug stuff on stderr, don't know how to suppress it.
* Work around by dev-nulling stderr. We lose all error messages :(
@@ -644,20 +647,31 @@ static int spawn_https_helper(const char *host, unsigned port)
argv[5] = NULL;
BB_EXECVP(argv[0], argv);
xmove_fd(3, 2);
+# if ENABLE_FEATURE_WGET_SSL_HELPER
+ child_failed = 1;
+ xfunc_die();
+# else
bb_perror_msg_and_die("can't execute '%s'", argv[0]);
+# endif
/* notreached */
}
/* Parent */
free(allocated);
close(sp[1]);
+# if ENABLE_FEATURE_WGET_SSL_HELPER
+ if (child_failed) {
+ close(sp[0]);
+ return -1;
+ }
+# endif
return sp[0];
}
#endif
/* See networking/ssl_helper/README how to build one */
#if ENABLE_FEATURE_WGET_SSL_HELPER
-static void spawn_https_helper(int network_fd)
+static void spawn_https_helper_small(int network_fd)
{
int sp[2];
int pid;
@@ -935,20 +949,36 @@ static void download_one_url(const char *url)
/* Open socket to http(s) server */
#if ENABLE_FEATURE_WGET_OPENSSL
+ /* openssl (and maybe ssl_helper) support is configured */
if (target.protocol == P_HTTPS) {
/* openssl-based helper
* Inconvenient API since we can't give it an open fd
*/
- int fd = spawn_https_helper(server.host, server.port);
+ int fd = spawn_https_helper_openssl(server.host, server.port);
+# if ENABLE_FEATURE_WGET_SSL_HELPER
+ if (fd < 0) { /* no openssl? try ssl_helper */
+ sfp = open_socket(lsa);
+ spawn_https_helper_small(fileno(sfp));
+ goto socket_opened;
+ }
+# else
+ /* We don't check for exec("openssl") failure in this case */
+# endif
sfp = fdopen(fd, "r+");
if (!sfp)
bb_perror_msg_and_die(bb_msg_memory_exhausted);
- } else
-#endif
- sfp = open_socket(lsa);
-#if ENABLE_FEATURE_WGET_SSL_HELPER
+ goto socket_opened;
+ }
+ sfp = open_socket(lsa);
+ socket_opened:
+#elif ENABLE_FEATURE_WGET_SSL_HELPER
+ /* Only ssl_helper support is configured */
+ sfp = open_socket(lsa);
if (target.protocol == P_HTTPS)
- spawn_https_helper(fileno(sfp));
+ spawn_https_helper_small(fileno(sfp));
+#else
+ /* ssl (https) support is not configured */
+ sfp = open_socket(lsa);
#endif
/* Send HTTP request */
if (use_proxy) {