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0ece10f26a
irssi/src/core/network-openssl.c
Timo Sirainen 0ece10f26a compile fix for glib2 
git-svn-id: http://svn.irssi.org/repos/irssi/trunk@3148 dbcabf3a-b0e7-0310-adc4-f8d773084564
2003-11-16 18:00:23 +00:00

559 lines
13 KiB
C
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/*
network-ssl.c : SSL support
Copyright (C) 2002 vjt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "module.h"
#include "network.h"
#include "misc.h"
#ifdef HAVE_OPENSSL
#include <openssl/crypto.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
/* ssl i/o channel object */
typedef struct
{
GIOChannel pad;
gint fd;
GIOChannel *giochan;
SSL *ssl;
SSL_CTX *ctx;
unsigned int got_cert:1;
unsigned int verify:1;
} GIOSSLChannel;
static SSL_CTX *ssl_ctx = NULL;
static void irssi_ssl_free(GIOChannel *handle)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
g_io_channel_unref(chan->giochan);
SSL_free(chan->ssl);
if (chan->ctx != ssl_ctx)
SSL_CTX_free(chan->ctx);
g_free(chan);
}
static gboolean irssi_ssl_verify(SSL *ssl, SSL_CTX *ctx, X509 *cert)
{
if (SSL_get_verify_result(ssl) != X509_V_OK) {
unsigned char md[EVP_MAX_MD_SIZE];
unsigned int n;
char *str;
g_warning("Could not verify SSL servers certificate:");
if ((str = X509_NAME_oneline(X509_get_subject_name(cert), 0, 0)) == NULL)
g_warning(" Could not get subject-name from peer certificate");
else {
g_warning(" Subject : %s", str);
free(str);
}
if ((str = X509_NAME_oneline(X509_get_issuer_name(cert), 0, 0)) == NULL)
g_warning(" Could not get issuer-name from peer certificate");
else {
g_warning(" Issuer : %s", str);
free(str);
}
if (! X509_digest(cert, EVP_md5(), md, &n))
g_warning(" Could not get fingerprint from peer certificate");
else {
char hex[] = "0123456789ABCDEF";
char fp[EVP_MAX_MD_SIZE*3];
if (n < sizeof(fp)) {
unsigned int i;
for (i = 0; i < n; i++) {
fp[i*3+0] = hex[(md[i] >> 4) & 0xF];
fp[i*3+1] = hex[(md[i] >> 0) & 0xF];
fp[i*3+2] = i == n - 1 ? '\0' : ':';
}
g_warning(" MD5 Fingerprint : %s", fp);
}
}
return FALSE;
}
return TRUE;
}
#if GLIB_MAJOR_VERSION < 2
#ifdef G_CAN_INLINE
G_INLINE_FUNC
#else
static
#endif
GIOError ssl_errno(gint e)
{
switch(e)
{
case EINVAL:
return G_IO_ERROR_INVAL;
case EINTR:
case EAGAIN:
return G_IO_ERROR_AGAIN;
default:
return G_IO_ERROR_INVAL;
}
/*UNREACH*/
return G_IO_ERROR_INVAL;
}
static GIOError irssi_ssl_cert_step(GIOSSLChannel *chan)
{
X509 *cert;
gint err;
switch(err = SSL_do_handshake(chan->ssl))
{
case 1:
if(!(cert = SSL_get_peer_certificate(chan->ssl)))
{
g_warning("SSL server supplied no certificate");
return G_IO_ERROR_INVAL;
}
if (chan->verify && ! irssi_ssl_verify(chan->ssl, chan->ctx, cert)) {
X509_free(cert);
return G_IO_ERROR_INVAL;
}
X509_free(cert);
return G_IO_ERROR_NONE;
default:
if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
return G_IO_ERROR_AGAIN;
return ssl_errno(errno);
}
/*UNREACH*/
return G_IO_ERROR_INVAL;
}
static GIOError irssi_ssl_read(GIOChannel *handle, gchar *buf, guint len, guint *ret)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
gint err;
if(! chan->got_cert)
{
gint cert_err = irssi_ssl_cert_step(chan);
if(cert_err != G_IO_ERROR_NONE)
return cert_err;
}
err = SSL_read(chan->ssl, buf, len);
if(err < 0)
{
*ret = 0;
if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
return G_IO_ERROR_AGAIN;
return ssl_errno(errno);
}
else
{
*ret = err;
return G_IO_ERROR_NONE;
}
/*UNREACH*/
return -1;
}
static GIOError irssi_ssl_write(GIOChannel *handle, gchar *buf, guint len, guint *ret)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
gint err;
if(chan->got_cert)
{
gint cert_err = irssi_ssl_cert_step(chan);
if(cert_err != G_IO_ERROR_NONE)
return cert_err;
}
err = SSL_write(chan->ssl, (const char *)buf, len);
if(err < 0)
{
*ret = 0;
if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
return G_IO_ERROR_AGAIN;
return ssl_errno(errno);
}
else
{
*ret = err;
return G_IO_ERROR_NONE;
}
/*UNREACH*/
return G_IO_ERROR_INVAL;
}
static GIOError irssi_ssl_seek(GIOChannel *handle, gint offset, GSeekType type)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
GIOError e;
e = g_io_channel_seek(chan->giochan, offset, type);
return (e == G_IO_ERROR_NONE) ? G_IO_ERROR_NONE : G_IO_ERROR_INVAL;
}
static void irssi_ssl_close(GIOChannel *handle)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
g_io_channel_close(chan->giochan);
}
static guint irssi_ssl_create_watch(GIOChannel *handle, gint priority, GIOCondition cond,
GIOFunc func, gpointer data, GDestroyNotify notify)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
return chan->giochan->funcs->io_add_watch(handle, priority, cond, func, data, notify);
}
/* ssl function pointers */
static GIOFuncs irssi_ssl_channel_funcs =
{
irssi_ssl_read,
irssi_ssl_write,
irssi_ssl_seek,
irssi_ssl_close,
irssi_ssl_create_watch,
irssi_ssl_free
};
#else /* GLIB_MAJOR_VERSION < 2 */
#ifdef G_CAN_INLINE
G_INLINE_FUNC
#else
static
#endif
GIOStatus ssl_errno(gint e)
{
switch(e)
{
case EINVAL:
return G_IO_STATUS_ERROR;
case EINTR:
case EAGAIN:
return G_IO_STATUS_AGAIN;
default:
return G_IO_STATUS_ERROR;
}
/*UNREACH*/
return G_IO_STATUS_ERROR;
}
static GIOStatus irssi_ssl_cert_step(GIOSSLChannel *chan)
{
X509 *cert;
gint err;
switch(err = SSL_do_handshake(chan->ssl))
{
case 1:
if(!(cert = SSL_get_peer_certificate(chan->ssl)))
{
g_warning("SSL server supplied no certificate");
return G_IO_STATUS_ERROR;
}
if (chan->verify && ! irssi_ssl_verify(chan->ssl, chan->ctx, cert)) {
X509_free(cert);
return G_IO_STATUS_ERROR;
}
X509_free(cert);
return G_IO_STATUS_NORMAL;
default:
if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
return G_IO_STATUS_AGAIN;
return ssl_errno(errno);
}
/*UNREACH*/
return G_IO_STATUS_ERROR;
}
static GIOStatus irssi_ssl_read(GIOChannel *handle, gchar *buf, guint len, guint *ret, GError **gerr)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
gint err;
if(! chan->got_cert)
{
gint cert_err = irssi_ssl_cert_step(chan);
if(cert_err != G_IO_STATUS_NORMAL)
return cert_err;
}
err = SSL_read(chan->ssl, buf, len);
if(err < 0)
{
*ret = 0;
if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
return G_IO_STATUS_AGAIN;
return ssl_errno(errno);
}
else
{
*ret = err;
return G_IO_STATUS_NORMAL;
}
/*UNREACH*/
return G_IO_STATUS_ERROR;
}
static GIOStatus irssi_ssl_write(GIOChannel *handle, const gchar *buf, gsize len, gsize *ret, GError **gerr)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
gint err;
if(! chan->got_cert)
{
gint cert_err = irssi_ssl_cert_step(chan);
if(cert_err != G_IO_STATUS_NORMAL)
return cert_err;
}
err = SSL_write(chan->ssl, (const char *)buf, len);
if(err < 0)
{
*ret = 0;
if(SSL_get_error(chan->ssl, err) == SSL_ERROR_WANT_READ)
return G_IO_STATUS_AGAIN;
return ssl_errno(errno);
}
else
{
*ret = err;
return G_IO_STATUS_NORMAL;
}
/*UNREACH*/
return G_IO_STATUS_ERROR;
}
static GIOStatus irssi_ssl_seek(GIOChannel *handle, gint64 offset, GSeekType type, GError **gerr)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
GIOError e;
e = g_io_channel_seek(chan->giochan, offset, type);
return (e == G_IO_ERROR_NONE) ? G_IO_STATUS_NORMAL : G_IO_STATUS_ERROR;
}
static GIOStatus irssi_ssl_close(GIOChannel *handle, GError **gerr)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
g_io_channel_close(chan->giochan);
return G_IO_STATUS_NORMAL;
}
static GSource *irssi_ssl_create_watch(GIOChannel *handle, GIOCondition cond)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
return chan->giochan->funcs->io_create_watch(handle, cond);
}
static GIOStatus irssi_ssl_set_flags(GIOChannel *handle, GIOFlags flags, GError **gerr)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
return chan->giochan->funcs->io_set_flags(handle, flags, gerr);
}
static GIOFlags irssi_ssl_get_flags(GIOChannel *handle)
{
GIOSSLChannel *chan = (GIOSSLChannel *)handle;
return chan->giochan->funcs->io_get_flags(handle);
}
static GIOFuncs irssi_ssl_channel_funcs = {
irssi_ssl_read,
irssi_ssl_write,
irssi_ssl_seek,
irssi_ssl_close,
irssi_ssl_create_watch,
irssi_ssl_free,
irssi_ssl_set_flags,
irssi_ssl_get_flags
};
#endif
static gboolean irssi_ssl_init(void)
{
SSL_library_init();
SSL_load_error_strings();
ssl_ctx = SSL_CTX_new(SSLv23_client_method());
if(!ssl_ctx)
{
g_error("Initialization of the SSL library failed");
return FALSE;
}
return TRUE;
}
static GIOChannel *irssi_ssl_get_iochannel(GIOChannel *handle, const char *mycert, const char *mypkey, const char *cafile, const char *capath, gboolean verify)
{
GIOSSLChannel *chan;
GIOChannel *gchan;
int err, fd;
SSL *ssl;
X509 *cert = NULL;
SSL_CTX *ctx = NULL;
g_return_val_if_fail(handle != NULL, NULL);
if(!ssl_ctx && !irssi_ssl_init())
return NULL;
if(!(fd = g_io_channel_unix_get_fd(handle)))
return NULL;
if (mycert && *mycert) {
char *scert = NULL, *spkey = NULL;
if ((ctx = SSL_CTX_new(SSLv23_client_method())) == NULL) {
g_error("Could not allocate memory for SSL context");
return NULL;
}
scert = convert_home(mycert);
if (mypkey && *mypkey)
spkey = convert_home(mypkey);
if (! SSL_CTX_use_certificate_file(ctx, scert, SSL_FILETYPE_PEM))
g_warning("Loading of client certificate '%s' failed", mycert);
else if (! SSL_CTX_use_PrivateKey_file(ctx, spkey ? spkey : scert, SSL_FILETYPE_PEM))
g_warning("Loading of private key '%s' failed", mypkey ? mypkey : mycert);
else if (! SSL_CTX_check_private_key(ctx))
g_warning("Private key does not match the certificate");
g_free(scert);
g_free(spkey);
}
if ((cafile && *cafile) || (capath && *capath)) {
char *scafile = NULL;
char *scapath = NULL;
if (! ctx && (ctx = SSL_CTX_new(SSLv23_client_method())) == NULL) {
g_error("Could not allocate memory for SSL context");
return NULL;
}
if (cafile && *cafile)
scafile = convert_home(cafile);
if (capath && *capath)
scapath = convert_home(capath);
if (! SSL_CTX_load_verify_locations(ctx, scafile, scapath)) {
g_warning("Could not load CA list for verifying SSL server certificate");
g_free(scafile);
g_free(scapath);
SSL_CTX_free(ctx);
return NULL;
}
g_free(scafile);
g_free(scapath);
verify = TRUE;
}
if (ctx == NULL)
ctx = ssl_ctx;
if(!(ssl = SSL_new(ctx)))
{
g_warning("Failed to allocate SSL structure");
return NULL;
}
if(!(err = SSL_set_fd(ssl, fd)))
{
g_warning("Failed to associate socket to SSL stream");
SSL_free(ssl);
if (ctx != ssl_ctx)
SSL_CTX_free(ctx);
return NULL;
}
if((err = SSL_connect(ssl)) <= 0)
{
switch(err = SSL_get_error(ssl, err))
{
case SSL_ERROR_SYSCALL:
if(errno == EINTR || errno == EAGAIN)
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE:
break;
default:
SSL_free(ssl);
if (ctx != ssl_ctx)
SSL_CTX_free(ctx);
return NULL;
}
}
else if(!(cert = SSL_get_peer_certificate(ssl)))
{
g_warning("SSL server supplied no certificate");
if (ctx != ssl_ctx)
SSL_CTX_free(ctx);
SSL_free(ssl);
return NULL;
}
else
{
if (verify && ! irssi_ssl_verify(ssl, ctx, cert)) {
SSL_free(ssl);
if (ctx != ssl_ctx)
SSL_CTX_free(ctx);
return NULL;
}
X509_free(cert);
}
chan = g_new0(GIOSSLChannel, 1);
chan->fd = fd;
chan->giochan = handle;
chan->ssl = ssl;
chan->ctx = ctx;
chan->got_cert = cert != NULL;
chan->verify = verify;
g_io_channel_ref(handle);
gchan = (GIOChannel *)chan;
gchan->funcs = &irssi_ssl_channel_funcs;
g_io_channel_init(gchan);
return gchan;
}
GIOChannel *net_connect_ip_ssl(IPADDR *ip, int port, IPADDR *my_ip, const char *cert, const char *pkey, const char *cafile, const char *capath, gboolean verify)
{
GIOChannel *gret = net_connect_ip(ip, port, my_ip);
gret = irssi_ssl_get_iochannel(gret, cert, pkey, cafile, capath, verify);
return gret;
}
#else /* HAVE_OPENSSL */
GIOChannel *net_connect_ip_ssl(IPADDR *ip, int port, IPADDR *my_ip)
{
g_warning("Connection failed: SSL support not enabled in this build.");
errno = ENOSYS;
return NULL;
}
#endif /* ! HAVE_OPENSSL */
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