diff options
Diffstat (limited to 'camel/camel-tcp-stream-openssl.c')
| -rw-r--r-- | camel/camel-tcp-stream-openssl.c | 701 |
1 files changed, 0 insertions, 701 deletions
diff --git a/camel/camel-tcp-stream-openssl.c b/camel/camel-tcp-stream-openssl.c deleted file mode 100644 index cceb9975b7..0000000000 --- a/camel/camel-tcp-stream-openssl.c +++ /dev/null @@ -1,701 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* - * Authors: Jeffrey Stedfast <fejj@ximian.com> - * - * Copyright 2001 Ximian, Inc. (www.ximian.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * 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. - * - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#ifdef HAVE_OPENSSL - -#include "camel-tcp-stream-openssl.h" - -#include <openssl/ssl.h> -#include <openssl/x509.h> -#include <openssl/err.h> -#include <sys/time.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <unistd.h> -#include <fcntl.h> -#include <errno.h> -#include <string.h> -#include "camel-session.h" -#include "camel-service.h" -#include "camel-operation.h" -#ifdef ENABLE_THREADS -#include <pthread.h> -#endif - -static CamelTcpStreamClass *parent_class = NULL; - -/* Returns the class for a CamelTcpStreamOpenSSL */ -#define CTSR_CLASS(so) CAMEL_TCP_STREAM_OPENSSL_CLASS (CAMEL_OBJECT_GET_CLASS (so)) - -static ssize_t stream_read (CamelStream *stream, char *buffer, size_t n); -static ssize_t stream_write (CamelStream *stream, const char *buffer, size_t n); -static int stream_flush (CamelStream *stream); -static int stream_close (CamelStream *stream); - -static int stream_connect (CamelTcpStream *stream, struct hostent *host, int port); -static int stream_getsockopt (CamelTcpStream *stream, CamelSockOptData *data); -static int stream_setsockopt (CamelTcpStream *stream, const CamelSockOptData *data); -static gpointer stream_get_socket (CamelTcpStream *stream); - -struct _CamelTcpStreamOpenSSLPrivate { - int sockfd; - SSL *ssl; - - CamelService *service; - char *expected_host; -}; - -static void -camel_tcp_stream_openssl_class_init (CamelTcpStreamOpenSSLClass *camel_tcp_stream_openssl_class) -{ - CamelTcpStreamClass *camel_tcp_stream_class = - CAMEL_TCP_STREAM_CLASS (camel_tcp_stream_openssl_class); - CamelStreamClass *camel_stream_class = - CAMEL_STREAM_CLASS (camel_tcp_stream_openssl_class); - - parent_class = CAMEL_TCP_STREAM_CLASS (camel_type_get_global_classfuncs (camel_tcp_stream_get_type ())); - - /* virtual method overload */ - camel_stream_class->read = stream_read; - camel_stream_class->write = stream_write; - camel_stream_class->flush = stream_flush; - camel_stream_class->close = stream_close; - - camel_tcp_stream_class->connect = stream_connect; - camel_tcp_stream_class->getsockopt = stream_getsockopt; - camel_tcp_stream_class->setsockopt = stream_setsockopt; - camel_tcp_stream_class->get_socket = stream_get_socket; -} - -static void -camel_tcp_stream_openssl_init (gpointer object, gpointer klass) -{ - CamelTcpStreamOpenSSL *stream = CAMEL_TCP_STREAM_OPENSSL (object); - - stream->priv = g_new0 (struct _CamelTcpStreamOpenSSLPrivate, 1); - stream->priv->sockfd = -1; -} - -static void -camel_tcp_stream_openssl_finalize (CamelObject *object) -{ - CamelTcpStreamOpenSSL *stream = CAMEL_TCP_STREAM_OPENSSL (object); - - if (stream->priv->ssl) { - SSL_shutdown (stream->priv->ssl); - - if (stream->priv->ssl->ctx) { - SSL_CTX_free (stream->priv->ssl->ctx); - } - - SSL_free (stream->priv->ssl); - } - - if (stream->priv->sockfd != -1) - close (stream->priv->sockfd); - - g_free (stream->priv->expected_host); - - g_free (stream->priv); -} - - -CamelType -camel_tcp_stream_openssl_get_type (void) -{ - static CamelType type = CAMEL_INVALID_TYPE; - - if (type == CAMEL_INVALID_TYPE) { - type = camel_type_register (camel_tcp_stream_get_type (), - "CamelTcpStreamOpenSSL", - sizeof (CamelTcpStreamOpenSSL), - sizeof (CamelTcpStreamOpenSSLClass), - (CamelObjectClassInitFunc) camel_tcp_stream_openssl_class_init, - NULL, - (CamelObjectInitFunc) camel_tcp_stream_openssl_init, - (CamelObjectFinalizeFunc) camel_tcp_stream_openssl_finalize); - } - - return type; -} - - -/** - * camel_tcp_stream_openssl_new: - * @service: camel service - * @expected_host: host that the stream is expecting to connect with. - * - * Since the SSL certificate authenticator may need to prompt the - * user, a CamelService is needed. @expected_host is needed as a - * protection against an MITM attack. - * - * Return value: a tcp stream - **/ -CamelStream * -camel_tcp_stream_openssl_new (CamelService *service, const char *expected_host) -{ - CamelTcpStreamOpenSSL *stream; - - stream = CAMEL_TCP_STREAM_OPENSSL (camel_object_new (camel_tcp_stream_openssl_get_type ())); - - stream->priv->service = service; - stream->priv->expected_host = g_strdup (expected_host); - - return CAMEL_STREAM (stream); -} - -static int -ssl_errno (SSL *ssl, int ret) -{ - switch (SSL_get_error (ssl, ret)) { - case SSL_ERROR_NONE: - return 0; - case SSL_ERROR_ZERO_RETURN: - /* this one does not map well at all */ - printf ("ssl_errno: SSL_ERROR_ZERO_RETURN\n"); - return EINVAL; - case SSL_ERROR_WANT_READ: /* non-fatal; retry */ - case SSL_ERROR_WANT_WRITE: /* non-fatal; retry */ - printf ("ssl_errno: SSL_ERROR_WANT_[READ,WRITE]\n"); - return EAGAIN; - case SSL_ERROR_SYSCALL: - printf ("ssl_errno: SSL_ERROR_SYSCALL\n"); - return EINTR; - case SSL_ERROR_SSL: - printf ("ssl_errno: SSL_ERROR_SSL <-- very useful error...riiiiight\n"); - return EINTR; - default: - printf ("ssl_errno: default error\n"); - return EINTR; - } -} - -static ssize_t -stream_read (CamelStream *stream, char *buffer, size_t n) -{ - CamelTcpStreamOpenSSL *tcp_stream_openssl = CAMEL_TCP_STREAM_OPENSSL (stream); - SSL *ssl = tcp_stream_openssl->priv->ssl; - ssize_t nread; - int cancel_fd; - - if (camel_operation_cancel_check (NULL)) { - errno = EINTR; - return -1; - } - - cancel_fd = camel_operation_cancel_fd (NULL); - if (cancel_fd == -1) { - do { - nread = SSL_read (ssl, buffer, n); - if (nread < 0) - errno = ssl_errno (ssl, nread); - } while (nread < 0 && (errno == EINTR || errno == EAGAIN)); - } else { - int error, flags, fdmax; - fd_set rdset; - - flags = fcntl (tcp_stream_openssl->priv->sockfd, F_GETFL); - fcntl (tcp_stream_openssl->priv->sockfd, F_SETFL, flags | O_NONBLOCK); - - fdmax = MAX (tcp_stream_openssl->priv->sockfd, cancel_fd) + 1; - - do { - FD_ZERO (&rdset); - FD_SET (tcp_stream_openssl->priv->sockfd, &rdset); - FD_SET (cancel_fd, &rdset); - - select (fdmax, &rdset, 0, 0, NULL); - if (FD_ISSET (cancel_fd, &rdset)) { - fcntl (tcp_stream_openssl->priv->sockfd, F_SETFL, flags); - errno = EINTR; - return -1; - } - - do { - nread = SSL_read (ssl, buffer, n); - if (nread < 0) - errno = ssl_errno (ssl, nread); - } while (nread < 0 && errno == EINTR); - } while (nread < 0 && errno == EAGAIN); - - error = errno; - fcntl (tcp_stream_openssl->priv->sockfd, F_SETFL, flags); - errno = error; - } - - return nread; -} - -static ssize_t -stream_write (CamelStream *stream, const char *buffer, size_t n) -{ - CamelTcpStreamOpenSSL *tcp_stream_openssl = CAMEL_TCP_STREAM_OPENSSL (stream); - SSL *ssl = tcp_stream_openssl->priv->ssl; - ssize_t w, written = 0; - int cancel_fd; - - if (camel_operation_cancel_check (NULL)) { - errno = EINTR; - return -1; - } - - cancel_fd = camel_operation_cancel_fd (NULL); - if (cancel_fd == -1) { - do { - do { - w = SSL_write (ssl, buffer + written, n - written); - if (w < 0) - errno = ssl_errno (ssl, w); - } while (w < 0 && (errno == EINTR || errno == EAGAIN)); - - if (w > 0) - written += w; - } while (w != -1 && written < n); - } else { - fd_set rdset, wrset; - int error, flags, fdmax; - - flags = fcntl (tcp_stream_openssl->priv->sockfd, F_GETFL); - fcntl (tcp_stream_openssl->priv->sockfd, F_SETFL, flags | O_NONBLOCK); - - fdmax = MAX (tcp_stream_openssl->priv->sockfd, cancel_fd) + 1; - do { - FD_ZERO (&rdset); - FD_ZERO (&wrset); - FD_SET (tcp_stream_openssl->priv->sockfd, &wrset); - FD_SET (cancel_fd, &rdset); - - select (fdmax, &rdset, &wrset, 0, NULL); - if (FD_ISSET (cancel_fd, &rdset)) { - fcntl (tcp_stream_openssl->priv->sockfd, F_SETFL, flags); - errno = EINTR; - return -1; - } - - do { - w = SSL_write (ssl, buffer + written, n - written); - if (w < 0) - errno = ssl_errno (ssl, w); - } while (w < 0 && errno == EINTR); - - if (w < 0) { - if (errno == EAGAIN) { - w = 0; - } else { - error = errno; - fcntl (tcp_stream_openssl->priv->sockfd, F_SETFL, flags); - errno = error; - return -1; - } - } else - written += w; - } while (w >= 0 && written < n); - - fcntl (tcp_stream_openssl->priv->sockfd, F_SETFL, flags); - } - - return written; -} - -static int -stream_flush (CamelStream *stream) -{ - return 0; -} - - -static void -close_ssl_connection (SSL *ssl) -{ - if (ssl) { - SSL_shutdown (ssl); - - if (ssl->ctx) - SSL_CTX_free (ssl->ctx); - - SSL_free (ssl); - } -} - -static int -stream_close (CamelStream *stream) -{ - close_ssl_connection (((CamelTcpStreamOpenSSL *)stream)->priv->ssl); - ((CamelTcpStreamOpenSSL *)stream)->priv->ssl = NULL; - - if (close (((CamelTcpStreamOpenSSL *)stream)->priv->sockfd) == -1) - return -1; - - ((CamelTcpStreamOpenSSL *)stream)->priv->sockfd = -1; - return 0; -} - -/* this is a 'cancellable' connect, cancellable from camel_operation_cancel etc */ -/* returns -1 & errno == EINTR if the connection was cancelled */ -static int -socket_connect (struct hostent *h, int port) -{ - struct sockaddr_in sin; - int fd; - int ret; - socklen_t len; - struct timeval tv; - int cancel_fd; - - /* see if we're cancelled yet */ - if (camel_operation_cancel_check (NULL)) { - errno = EINTR; - return -1; - } - - /* setup connect, we do it using a nonblocking socket so we can poll it */ - sin.sin_port = htons (port); - sin.sin_family = h->h_addrtype; - memcpy (&sin.sin_addr, h->h_addr, sizeof (sin.sin_addr)); - - fd = socket (h->h_addrtype, SOCK_STREAM, 0); - - cancel_fd = camel_operation_cancel_fd (NULL); - if (cancel_fd == -1) { - ret = connect (fd, (struct sockaddr *)&sin, sizeof (sin)); - if (ret == -1) { - close (fd); - return -1; - } - - return fd; - } else { - fd_set rdset, wrset; - int flags, fdmax; - - flags = fcntl (fd, F_GETFL); - fcntl (fd, F_SETFL, flags | O_NONBLOCK); - - ret = connect (fd, (struct sockaddr *)&sin, sizeof (sin)); - if (ret == 0) { - fcntl (fd, F_SETFL, flags); - return fd; - } - - if (errno != EINPROGRESS) { - close (fd); - return -1; - } - - FD_ZERO (&rdset); - FD_ZERO (&wrset); - FD_SET (fd, &wrset); - FD_SET (cancel_fd, &rdset); - fdmax = MAX (fd, cancel_fd) + 1; - tv.tv_usec = 0; - tv.tv_sec = 60 * 4; - - if (select (fdmax, &rdset, &wrset, 0, &tv) == 0) { - close (fd); - errno = ETIMEDOUT; - return -1; - } - - if (cancel_fd != -1 && FD_ISSET (cancel_fd, &rdset)) { - close (fd); - errno = EINTR; - return -1; - } else { - len = sizeof (int); - - if (getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &len) == -1) { - close (fd); - return -1; - } - - if (ret != 0) { - close (fd); - errno = ret; - return -1; - } - } - - fcntl (fd, F_SETFL, flags); - } - - return fd; -} - -static void -save_ssl_cert (const char *certid) -{ - char *path, *filename; - struct stat st; - int fd; - - path = g_strdup_printf ("%s/.camel_certs", getenv ("HOME")); - if (mkdir (path, 0700) == -1) { - if (errno != EEXIST) - return; - - if (stat (path, &st) == -1) - return; - - if (!S_ISDIR (st.st_mode)) - return; - } - - filename = g_strdup_printf ("%s/%s", path, certid); - g_free (path); - - fd = open (filename, O_WRONLY | O_CREAT, 0600); - if (fd != -1) - close (fd); - - g_free (filename); -} - -static gboolean -ssl_cert_is_saved (const char *certid) -{ - char *filename; - struct stat st; - - filename = g_strdup_printf ("%s/.camel_certs/%s", getenv ("HOME"), certid); - - if (stat (filename, &st) == -1) { - g_free (filename); - return FALSE; - } - - g_free (filename); - - return st.st_uid == getuid (); -} - -static int -ssl_verify (int ok, X509_STORE_CTX *ctx) -{ - CamelTcpStreamOpenSSL *stream; - X509 *cert; - SSL *ssl; - int err; - - ssl = X509_STORE_CTX_get_ex_data (ctx, SSL_get_ex_data_X509_STORE_CTX_idx ()); - - stream = SSL_CTX_get_app_data (ssl->ctx); - - cert = X509_STORE_CTX_get_current_cert (ctx); - err = X509_STORE_CTX_get_error (ctx); - - if (stream) - ok = ssl_cert_is_saved (stream->priv->expected_host); - - if (!ok && stream) { - CamelService *service = stream->priv->service; - char *prompt, *cert_str; - char buf[257]; - -#define GET_STRING(name) X509_NAME_oneline (name, buf, 256) - - cert_str = g_strdup_printf (_("Issuer: %s\n" - "Subject: %s"), - GET_STRING (X509_get_issuer_name (cert)), - GET_STRING (X509_get_subject_name (cert))); - - prompt = g_strdup_printf (_("Bad certificate from %s:\n\n%s\n\n" - "Do you wish to accept anyway?"), - service->url->host, cert_str); - - ok = camel_session_alert_user (service->session, CAMEL_SESSION_ALERT_WARNING, prompt, TRUE); - g_free (prompt); - - if (ok) - save_ssl_cert (stream->priv->expected_host); - } - - return ok; -} - -static SSL * -open_ssl_connection (CamelService *service, int sockfd, CamelTcpStreamOpenSSL *openssl) -{ - SSL_CTX *ssl_ctx = NULL; - SSL *ssl = NULL; - int n; - - SSLeay_add_ssl_algorithms(); - SSL_load_error_strings(); - - /* SSLv23_client_method will negotiate with SSL v2, v3, or TLS v1 */ - ssl_ctx = SSL_CTX_new (SSLv23_client_method ()); - g_return_val_if_fail (ssl_ctx != NULL, NULL); - - SSL_CTX_set_verify (ssl_ctx, SSL_VERIFY_PEER, &ssl_verify); - ssl = SSL_new (ssl_ctx); - SSL_set_fd (ssl, sockfd); - - SSL_CTX_set_app_data (ssl_ctx, openssl); - - n = SSL_connect (ssl); - if (n != 1) { - errno = ssl_errno (ssl, n); - - SSL_shutdown (ssl); - - if (ssl->ctx) - SSL_CTX_free (ssl->ctx); - - SSL_free (ssl); - ssl = NULL; - } - - return ssl; -} - -static int -stream_connect (CamelTcpStream *stream, struct hostent *host, int port) -{ - CamelTcpStreamOpenSSL *openssl = CAMEL_TCP_STREAM_OPENSSL (stream); - SSL *ssl; - int fd; - - g_return_val_if_fail (host != NULL, -1); - - fd = socket_connect (host, port); - if (fd == -1) - return -1; - - ssl = open_ssl_connection (openssl->priv->service, fd, openssl); - if (!ssl) - return -1; - - openssl->priv->sockfd = fd; - openssl->priv->ssl = ssl; - - return 0; -} - - -static int -get_sockopt_level (const CamelSockOptData *data) -{ - switch (data->option) { - case CAMEL_SOCKOPT_MAXSEGMENT: - case CAMEL_SOCKOPT_NODELAY: - return IPPROTO_TCP; - default: - return SOL_SOCKET; - } -} - -static int -get_sockopt_optname (const CamelSockOptData *data) -{ - switch (data->option) { - case CAMEL_SOCKOPT_MAXSEGMENT: - return TCP_MAXSEG; - case CAMEL_SOCKOPT_NODELAY: - return TCP_NODELAY; - case CAMEL_SOCKOPT_BROADCAST: - return SO_BROADCAST; - case CAMEL_SOCKOPT_KEEPALIVE: - return SO_KEEPALIVE; - case CAMEL_SOCKOPT_LINGER: - return SO_LINGER; - case CAMEL_SOCKOPT_RECVBUFFERSIZE: - return SO_RCVBUF; - case CAMEL_SOCKOPT_SENDBUFFERSIZE: - return SO_SNDBUF; - case CAMEL_SOCKOPT_REUSEADDR: - return SO_REUSEADDR; - case CAMEL_SOCKOPT_IPTYPEOFSERVICE: - return SO_TYPE; - default: - return -1; - } -} - -static int -stream_getsockopt (CamelTcpStream *stream, CamelSockOptData *data) -{ - int optname, optlen; - - if ((optname = get_sockopt_optname (data)) == -1) - return -1; - - if (data->option == CAMEL_SOCKOPT_NONBLOCKING) { - int flags; - - flags = fcntl (((CamelTcpStreamOpenSSL *)stream)->priv->sockfd, F_GETFL); - if (flags == -1) - return -1; - - data->value.non_blocking = flags & O_NONBLOCK; - - return 0; - } - - return getsockopt (((CamelTcpStreamOpenSSL *)stream)->priv->sockfd, - get_sockopt_level (data), - optname, - (void *) &data->value, - &optlen); -} - -static int -stream_setsockopt (CamelTcpStream *stream, const CamelSockOptData *data) -{ - int optname; - - if ((optname = get_sockopt_optname (data)) == -1) - return -1; - - if (data->option == CAMEL_SOCKOPT_NONBLOCKING) { - int flags, set; - - flags = fcntl (((CamelTcpStreamOpenSSL *)stream)->priv->sockfd, F_GETFL); - if (flags == -1) - return -1; - - set = data->value.non_blocking ? 1 : 0; - flags = (flags & ~O_NONBLOCK) | (set & O_NONBLOCK); - - if (fcntl (((CamelTcpStreamOpenSSL *)stream)->priv->sockfd, F_SETFL, flags) == -1) - return -1; - - return 0; - } - - return setsockopt (((CamelTcpStreamOpenSSL *)stream)->priv->sockfd, - get_sockopt_level (data), - optname, - (void *) &data->value, - sizeof (data->value)); -} - -static gpointer -stream_get_socket (CamelTcpStream *stream) -{ - return GINT_TO_POINTER (CAMEL_TCP_STREAM_OPENSSL (stream)->priv->sockfd); -} - -#endif /* HAVE_OPENSSL */ |