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39fc0f5ea1
git-svn-id: http://svn.irssi.org/repos/irssi/trunk@2977 dbcabf3a-b0e7-0310-adc4-f8d773084564
436 lines
9.0 KiB
C
436 lines
9.0 KiB
C
/*
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network-ssl.c : SSL support
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Copyright (C) 2002 vjt
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "module.h"
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#include "network.h"
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#ifdef HAVE_OPENSSL
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#include <openssl/crypto.h>
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#include <openssl/x509.h>
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#include <openssl/pem.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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/* ssl i/o channel object */
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typedef struct
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{
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GIOChannel pad;
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gint fd;
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GIOChannel *giochan;
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SSL *ssl;
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X509 *cert;
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} GIOSSLChannel;
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static void irssi_ssl_free(GIOChannel *handle)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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g_io_channel_unref(chan->giochan);
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SSL_free(chan->ssl);
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g_free(chan);
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}
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#if GLIB_MAJOR_VERSION < 2
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#ifdef G_CAN_INLINE
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G_INLINE_FUNC
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#else
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static
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#endif
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GIOError ssl_errno(gint e)
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{
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switch(e)
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{
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case EINVAL:
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return G_IO_ERROR_INVAL;
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case EINTR:
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case EAGAIN:
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return G_IO_ERROR_AGAIN;
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default:
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return G_IO_ERROR_INVAL;
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}
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/*UNREACH*/
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return G_IO_ERROR_INVAL;
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}
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static GIOError irssi_ssl_cert_step(GIOSSLChannel *chan)
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{
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gint err;
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switch(err = SSL_do_handshake(chan->ssl))
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{
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case 1:
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if(!(chan->cert = SSL_get_peer_certificate(chan->ssl)))
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{
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g_warning("SSL server supplied no certificate");
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return G_IO_ERROR_INVAL;
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}
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return G_IO_ERROR_NONE;
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default:
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if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
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return G_IO_ERROR_AGAIN;
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return ssl_errno(errno);
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}
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/*UNREACH*/
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return G_IO_ERROR_INVAL;
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}
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static GIOError irssi_ssl_read(GIOChannel *handle, gchar *buf, guint len, guint *ret)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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gint err;
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if(chan->cert == NULL)
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{
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gint cert_err = irssi_ssl_cert_step(chan);
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if(cert_err != G_IO_ERROR_NONE)
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return cert_err;
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}
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err = SSL_read(chan->ssl, buf, len);
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if(err < 0)
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{
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*ret = 0;
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if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
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return G_IO_ERROR_AGAIN;
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return ssl_errno(errno);
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}
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else
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{
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*ret = err;
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return G_IO_ERROR_NONE;
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}
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/*UNREACH*/
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return -1;
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}
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static GIOError irssi_ssl_write(GIOChannel *handle, gchar *buf, guint len, guint *ret)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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gint err;
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if(chan->cert == NULL)
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{
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gint cert_err = irssi_ssl_cert_step(chan);
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if(cert_err != G_IO_ERROR_NONE)
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return cert_err;
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}
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err = SSL_write(chan->ssl, (const char *)buf, len);
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if(err < 0)
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{
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*ret = 0;
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if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
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return G_IO_ERROR_AGAIN;
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return ssl_errno(errno);
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}
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else
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{
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*ret = err;
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return G_IO_ERROR_NONE;
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}
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/*UNREACH*/
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return G_IO_ERROR_INVAL;
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}
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static GIOError irssi_ssl_seek(GIOChannel *handle, gint offset, GSeekType type)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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GIOError e;
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e = g_io_channel_seek(chan->giochan, offset, type);
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return (e == G_IO_ERROR_NONE) ? G_IO_ERROR_NONE : G_IO_ERROR_INVAL;
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}
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static void irssi_ssl_close(GIOChannel *handle)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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g_io_channel_close(chan->giochan);
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}
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static guint irssi_ssl_create_watch(GIOChannel *handle, gint priority, GIOCondition cond,
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GIOFunc func, gpointer data, GDestroyNotify notify)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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return chan->giochan->funcs->io_add_watch(handle, priority, cond, func, data, notify);
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}
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/* ssl function pointers */
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static GIOFuncs irssi_ssl_channel_funcs =
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{
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irssi_ssl_read,
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irssi_ssl_write,
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irssi_ssl_seek,
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irssi_ssl_close,
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irssi_ssl_create_watch,
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irssi_ssl_free
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};
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#else /* GLIB_MAJOR_VERSION < 2 */
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#ifdef G_CAN_INLINE
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G_INLINE_FUNC
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#else
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static
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#endif
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GIOStatus ssl_errno(gint e)
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{
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switch(e)
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{
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case EINVAL:
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return G_IO_STATUS_ERROR;
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case EINTR:
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case EAGAIN:
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return G_IO_STATUS_AGAIN;
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default:
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return G_IO_STATUS_ERROR;
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}
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/*UNREACH*/
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return G_IO_STATUS_ERROR;
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}
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static GIOStatus irssi_ssl_cert_step(GIOSSLChannel *chan)
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{
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gint err;
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switch(err = SSL_do_handshake(chan->ssl))
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{
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case 1:
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if(!(chan->cert = SSL_get_peer_certificate(chan->ssl)))
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{
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g_warning("SSL server supplied no certificate");
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return G_IO_STATUS_ERROR;
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}
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return G_IO_STATUS_NORMAL;
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default:
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if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
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return G_IO_STATUS_AGAIN;
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return ssl_errno(errno);
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}
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/*UNREACH*/
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return G_IO_STATUS_ERROR;
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}
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static GIOStatus irssi_ssl_read(GIOChannel *handle, gchar *buf, guint len, guint *ret, GError **gerr)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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gint err;
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if(chan->cert == NULL)
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{
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gint cert_err = irssi_ssl_cert_step(chan);
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if(cert_err != G_IO_STATUS_NORMAL)
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return cert_err;
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}
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err = SSL_read(chan->ssl, buf, len);
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if(err < 0)
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{
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*ret = 0;
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if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
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return G_IO_STATUS_AGAIN;
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return ssl_errno(errno);
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}
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else
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{
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*ret = err;
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return G_IO_STATUS_NORMAL;
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}
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/*UNREACH*/
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return G_IO_STATUS_ERROR;
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}
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static GIOStatus irssi_ssl_write(GIOChannel *handle, const gchar *buf, gsize len, gsize *ret, GError **gerr)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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gint err;
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if(chan->cert == NULL)
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{
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gint cert_err = irssi_ssl_cert_step(chan);
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if(cert_err != G_IO_STATUS_NORMAL)
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return cert_err;
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}
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err = SSL_write(chan->ssl, (const char *)buf, len);
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if(err < 0)
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{
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*ret = 0;
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if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
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return G_IO_STATUS_AGAIN;
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return ssl_errno(errno);
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}
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else
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{
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*ret = err;
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return G_IO_STATUS_NORMAL;
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}
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/*UNREACH*/
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return G_IO_STATUS_ERROR;
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}
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static GIOStatus irssi_ssl_seek(GIOChannel *handle, gint64 offset, GSeekType type, GError **gerr)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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GIOError e;
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e = g_io_channel_seek(chan->giochan, offset, type);
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return (e == G_IO_ERROR_NONE) ? G_IO_STATUS_NORMAL : G_IO_STATUS_ERROR;
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}
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static GIOStatus irssi_ssl_close(GIOChannel *handle, GError **gerr)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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g_io_channel_close(chan->giochan);
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return G_IO_STATUS_NORMAL;
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}
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static GSource *irssi_ssl_create_watch(GIOChannel *handle, GIOCondition cond)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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return chan->giochan->funcs->io_create_watch(handle, cond);
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}
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static GIOStatus irssi_ssl_set_flags(GIOChannel *handle, GIOFlags flags, GError **gerr)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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return chan->giochan->funcs->io_set_flags(handle, flags, gerr);
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}
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static GIOFlags irssi_ssl_get_flags(GIOChannel *handle)
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{
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GIOSSLChannel *chan = (GIOSSLChannel *)handle;
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return chan->giochan->funcs->io_get_flags(handle);
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}
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static GIOFuncs irssi_ssl_channel_funcs = {
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irssi_ssl_read,
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irssi_ssl_write,
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irssi_ssl_seek,
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irssi_ssl_close,
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irssi_ssl_create_watch,
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irssi_ssl_free,
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irssi_ssl_set_flags,
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irssi_ssl_get_flags
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};
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#endif
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static SSL_CTX *ssl_ctx = NULL;
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static gboolean irssi_ssl_init(void)
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{
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SSL_library_init();
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SSL_load_error_strings();
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ssl_ctx = SSL_CTX_new(SSLv23_client_method());
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if(!ssl_ctx)
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{
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g_error("Initialization of the SSL library failed");
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return FALSE;
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}
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return TRUE;
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}
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static GIOChannel *irssi_ssl_get_iochannel(GIOChannel *handle)
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{
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GIOSSLChannel *chan;
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GIOChannel *gchan;
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int err, fd;
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SSL *ssl;
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X509 *cert = NULL;
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g_return_val_if_fail(handle != NULL, NULL);
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if(!ssl_ctx && !irssi_ssl_init())
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return NULL;
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if(!(fd = g_io_channel_unix_get_fd(handle)))
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return NULL;
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if(!(ssl = SSL_new(ssl_ctx)))
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{
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g_warning("Failed to allocate SSL structure");
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return NULL;
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}
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if(!(err = SSL_set_fd(ssl, fd)))
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{
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g_warning("Failed to associate socket to SSL stream");
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return NULL;
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}
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if((err = SSL_connect(ssl)) <= 0)
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{
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switch(err = SSL_get_error(ssl, err))
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{
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case SSL_ERROR_SYSCALL:
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if(errno == EINTR || errno == EAGAIN)
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case SSL_ERROR_WANT_READ:
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case SSL_ERROR_WANT_WRITE:
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break;
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default:
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return NULL;
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}
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}
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else if(!(cert = SSL_get_peer_certificate(ssl)))
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{
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g_warning("SSL server supplied no certificate");
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return NULL;
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}
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else
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X509_free(cert);
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chan = g_new0(GIOSSLChannel, 1);
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chan->fd = fd;
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chan->giochan = handle;
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chan->ssl = ssl;
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chan->cert = cert;
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g_io_channel_ref(handle);
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gchan = (GIOChannel *)chan;
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gchan->funcs = &irssi_ssl_channel_funcs;
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g_io_channel_init(gchan);
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return gchan;
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}
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GIOChannel *net_connect_ip_ssl(IPADDR *ip, int port, IPADDR *my_ip)
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{
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GIOChannel *gret = net_connect_ip(ip, port, my_ip);
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gret = irssi_ssl_get_iochannel(gret);
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return gret;
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}
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#else /* HAVE_OPENSSL */
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GIOChannel *net_connect_ip_ssl(IPADDR *ip, int port, IPADDR *my_ip)
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{
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g_warning("Connection failed: SSL support not enabled in this build.");
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errno = ENOSYS;
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return NULL;
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}
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#endif /* ! HAVE_OPENSSL */
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