/* SSL support via GnuTLS library.
- Copyright (C) 2005, 2006, 2007, 2008, 2009 Free Software Foundation,
- Inc.
+ Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software
+ Foundation, Inc.
This file is part of GNU Wget.
#include <assert.h>
#include <errno.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
#include <string.h>
#include <stdio.h>
+#include <dirent.h>
+#include <stdlib.h>
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
+#include <sys/ioctl.h>
#include "utils.h"
#include "connect.h"
#include "url.h"
+#include "ptimer.h"
#include "ssl.h"
+#ifdef WIN32
+# include "w32sock.h"
+#endif
+
/* Note: some of the functions private to this file have names that
begin with "wgnutls_" (e.g. wgnutls_read) so that they wouldn't be
confused with actual gnutls functions -- such as the gnutls_read
preprocessor macro. */
static gnutls_certificate_credentials credentials;
-
bool
ssl_init ()
{
+ const char *ca_directory;
+ DIR *dir;
+
gnutls_global_init ();
gnutls_certificate_allocate_credentials (&credentials);
+ gnutls_certificate_set_verify_flags(credentials,
+ GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT);
+
+ ca_directory = opt.ca_directory ? opt.ca_directory : "/etc/ssl/certs";
+
+ dir = opendir (ca_directory);
+ if (dir == NULL)
+ {
+ if (opt.ca_directory)
+ logprintf (LOG_NOTQUIET, _("ERROR: Cannot open directory %s.\n"),
+ opt.ca_directory);
+ }
+ else
+ {
+ struct dirent *dent;
+ while ((dent = readdir (dir)) != NULL)
+ {
+ struct stat st;
+ char *ca_file;
+ asprintf (&ca_file, "%s/%s", ca_directory, dent->d_name);
+
+ stat (ca_file, &st);
+
+ if (S_ISREG (st.st_mode))
+ gnutls_certificate_set_x509_trust_file (credentials, ca_file,
+ GNUTLS_X509_FMT_PEM);
+
+ free (ca_file);
+ }
+
+ closedir (dir);
+ }
+
if (opt.ca_cert)
gnutls_certificate_set_x509_trust_file (credentials, opt.ca_cert,
GNUTLS_X509_FMT_PEM);
return true;
}
-struct wgnutls_transport_context {
+struct wgnutls_transport_context
+{
gnutls_session session; /* GnuTLS session handle */
int last_error; /* last error returned by read/write/... */
is stored to PEEKBUF, and wgnutls_read checks that buffer before
actually reading. */
char peekbuf[512];
- int peekstart, peeklen;
+ int peeklen;
};
#ifndef MIN
# define MIN(i, j) ((i) <= (j) ? (i) : (j))
#endif
+
+static int
+wgnutls_read_timeout (int fd, char *buf, int bufsize, void *arg, double timeout)
+{
+#ifdef F_GETFL
+ int flags = 0;
+#endif
+ int ret = 0;
+ struct ptimer *timer;
+ struct wgnutls_transport_context *ctx = arg;
+ int timed_out = 0;
+
+ if (timeout)
+ {
+#ifdef F_GETFL
+ flags = fcntl (fd, F_GETFL, 0);
+ if (flags < 0)
+ return flags;
+#endif
+ timer = ptimer_new ();
+ if (timer == 0)
+ return -1;
+ }
+
+ do
+ {
+ double next_timeout = timeout - ptimer_measure (timer);
+ if (timeout && next_timeout < 0)
+ break;
+
+ ret = GNUTLS_E_AGAIN;
+ if (timeout == 0 || gnutls_record_check_pending (ctx->session)
+ || select_fd (fd, next_timeout, WAIT_FOR_READ))
+ {
+ if (timeout)
+ {
+#ifdef F_GETFL
+ ret = fcntl (fd, F_SETFL, flags | O_NONBLOCK);
+ if (ret < 0)
+ return ret;
+#else
+ /* XXX: Assume it was blocking before. */
+ const int one = 1;
+ ret = ioctl (fd, FIONBIO, &one);
+ if (ret < 0)
+ return ret;
+#endif
+ }
+
+ ret = gnutls_record_recv (ctx->session, buf, bufsize);
+
+ if (timeout)
+ {
+ int status;
+#ifdef F_GETFL
+ status = fcntl (fd, F_SETFL, flags);
+ if (status < 0)
+ return status;
+#else
+ const int zero = 0;
+ status = ioctl (fd, FIONBIO, &zero);
+ if (status < 0)
+ return status;
+#endif
+ }
+ }
+
+ timed_out = timeout && ptimer_measure (timer) >= timeout;
+ }
+ while (ret == GNUTLS_E_INTERRUPTED || (ret == GNUTLS_E_AGAIN && !timed_out));
+
+ if (timeout)
+ ptimer_destroy (timer);
+
+ if (timeout && timed_out && ret == GNUTLS_E_AGAIN)
+ errno = ETIMEDOUT;
+
+ return ret;
+}
+
static int
wgnutls_read (int fd, char *buf, int bufsize, void *arg)
{
- int ret;
+#ifdef F_GETFL
+ int flags = 0;
+#endif
+ int ret = 0;
+ struct ptimer *timer;
struct wgnutls_transport_context *ctx = arg;
if (ctx->peeklen)
{
/* If we have any peek data, simply return that. */
int copysize = MIN (bufsize, ctx->peeklen);
- memcpy (buf, ctx->peekbuf + ctx->peekstart, copysize);
+ memcpy (buf, ctx->peekbuf, copysize);
ctx->peeklen -= copysize;
if (ctx->peeklen != 0)
- ctx->peekstart += copysize;
- else
- ctx->peekstart = 0;
+ memmove (ctx->peekbuf, ctx->peekbuf + copysize, ctx->peeklen);
+
return copysize;
}
- do
- ret = gnutls_record_recv (ctx->session, buf, bufsize);
- while (ret == GNUTLS_E_INTERRUPTED);
-
+ ret = wgnutls_read_timeout (fd, buf, bufsize, arg, opt.read_timeout);
if (ret < 0)
ctx->last_error = ret;
+
return ret;
}
struct wgnutls_transport_context *ctx = arg;
do
ret = gnutls_record_send (ctx->session, buf, bufsize);
- while (ret == GNUTLS_E_INTERRUPTED);
+ while (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN);
if (ret < 0)
ctx->last_error = ret;
return ret;
static int
wgnutls_poll (int fd, double timeout, int wait_for, void *arg)
{
- return 1;
+ struct wgnutls_transport_context *ctx = arg;
+ return ctx->peeklen || gnutls_record_check_pending (ctx->session)
+ || select_fd (fd, timeout, wait_for);
}
static int
wgnutls_peek (int fd, char *buf, int bufsize, void *arg)
{
- int ret;
+ int read = 0;
struct wgnutls_transport_context *ctx = arg;
-
- /* We don't support peeks following peeks: the reader must drain all
- peeked data before the next peek. */
- assert (ctx->peeklen == 0);
+ int offset = MIN (bufsize, ctx->peeklen);
if (bufsize > sizeof ctx->peekbuf)
bufsize = sizeof ctx->peekbuf;
- do
- ret = gnutls_record_recv (ctx->session, buf, bufsize);
- while (ret == GNUTLS_E_INTERRUPTED);
+ if (ctx->peeklen)
+ memcpy (buf, ctx->peekbuf, offset);
- if (ret >= 0)
+ if (bufsize > offset)
{
- memcpy (ctx->peekbuf, buf, ret);
- ctx->peeklen = ret;
+ if (gnutls_record_check_pending (ctx->session) <= 0
+ && select_fd (fd, 0.0, WAIT_FOR_READ) <= 0)
+ read = 0;
+ else
+ read = wgnutls_read_timeout (fd, buf + offset, bufsize - offset,
+ ctx, opt.read_timeout);
+ if (read < 0)
+ {
+ if (offset)
+ read = 0;
+ else
+ return read;
+ }
+
+ if (read > 0)
+ {
+ memcpy (ctx->peekbuf + offset, buf + offset,
+ read);
+ ctx->peeklen += read;
+ }
}
- return ret;
+
+ return offset + read;
}
static const char *
/* gnutls_transport is the singleton that describes the SSL transport
methods provided by this file. */
-static struct transport_implementation wgnutls_transport = {
+static struct transport_implementation wgnutls_transport =
+{
wgnutls_read, wgnutls_write, wgnutls_poll,
wgnutls_peek, wgnutls_errstr, wgnutls_close
};
bool
-ssl_connect (int fd)
+ssl_connect_wget (int fd)
{
- static const int cert_type_priority[] = {
- GNUTLS_CRT_X509, GNUTLS_CRT_OPENPGP, 0
- };
struct wgnutls_transport_context *ctx;
gnutls_session session;
int err;
gnutls_init (&session, GNUTLS_CLIENT);
gnutls_set_default_priority (session);
- gnutls_certificate_type_set_priority (session, cert_type_priority);
gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, credentials);
- gnutls_transport_set_ptr (session, (gnutls_transport_ptr) fd);
+#ifndef FD_TO_SOCKET
+# define FD_TO_SOCKET(X) (X)
+#endif
+ gnutls_transport_set_ptr (session, (gnutls_transport_ptr) FD_TO_SOCKET (fd));
+
+ err = 0;
+#if HAVE_GNUTLS_PRIORITY_SET_DIRECT
+ switch (opt.secure_protocol)
+ {
+ case secure_protocol_auto:
+ break;
+ case secure_protocol_sslv2:
+ case secure_protocol_sslv3:
+ err = gnutls_priority_set_direct (session, "NORMAL:-VERS-TLS-ALL", NULL);
+ break;
+ case secure_protocol_tlsv1:
+ err = gnutls_priority_set_direct (session, "NORMAL:-VERS-SSL3.0", NULL);
+ break;
+ default:
+ abort ();
+ }
+#else
+ int allowed_protocols[4] = {0, 0, 0, 0};
+ switch (opt.secure_protocol)
+ {
+ case secure_protocol_auto:
+ break;
+ case secure_protocol_sslv2:
+ case secure_protocol_sslv3:
+ allowed_protocols[0] = GNUTLS_SSL3;
+ err = gnutls_protocol_set_priority (session, allowed_protocols);
+ break;
+
+ case secure_protocol_tlsv1:
+ allowed_protocols[0] = GNUTLS_TLS1_0;
+ allowed_protocols[1] = GNUTLS_TLS1_1;
+ allowed_protocols[2] = GNUTLS_TLS1_2;
+ err = gnutls_protocol_set_priority (session, allowed_protocols);
+ break;
+
+ default:
+ abort ();
+ }
+#endif
+
+ if (err < 0)
+ {
+ logprintf (LOG_NOTQUIET, "GnuTLS: %s\n", gnutls_strerror (err));
+ gnutls_deinit (session);
+ return false;
+ }
+
err = gnutls_handshake (session);
if (err < 0)
{
gnutls_deinit (session);
return false;
}
+
ctx = xnew0 (struct wgnutls_transport_context);
ctx->session = session;
fd_register_transport (fd, &wgnutls_transport, ctx);
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