--- /dev/null
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+/*
+ * Source file for all CyaSSL-specific code for the TLS/SSL layer. No code
+ * but sslgen.c should ever call or use these functions.
+ *
+ */
+
+#include "setup.h"
+#ifdef USE_CYASSL
+
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
+
+#include "urldata.h"
+#include "sendf.h"
+#include "inet_pton.h"
+#include "cyassl.h"
+#include "sslgen.h"
+#include "parsedate.h"
+#include "connect.h" /* for the connect timeout */
+#include "select.h"
+#include "rawstr.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+
+static Curl_recv cyassl_recv;
+static Curl_send cyassl_send;
+
+
+static int do_file_type(const char *type)
+{
+ if(!type || !type[0])
+ return SSL_FILETYPE_PEM;
+ if(Curl_raw_equal(type, "PEM"))
+ return SSL_FILETYPE_PEM;
+ if(Curl_raw_equal(type, "DER"))
+ return SSL_FILETYPE_ASN1;
+ return -1;
+}
+
+/*
+ * This function loads all the client/CA certificates and CRLs. Setup the TLS
+ * layer and do all necessary magic.
+ */
+static CURLcode
+cyassl_connect_step1(struct connectdata *conn,
+ int sockindex)
+{
+ int ret = -1;
+ struct SessionHandle *data = conn->data;
+ struct ssl_connect_data* conssl = &conn->ssl[sockindex];
+ SSL_METHOD* req_method = NULL;
+ void* ssl_sessionid = NULL;
+ curl_socket_t sockfd = conn->sock[sockindex];
+
+ if(conssl->state == ssl_connection_complete)
+ return CURLE_OK;
+
+ /* CyaSSL doesn't support SSLv2 */
+ if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) {
+ failf(data, "CyaSSL does not support SSLv2");
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+
+ /* check to see if we've been told to use an explicit SSL/TLS version */
+ switch(data->set.ssl.version) {
+ case CURL_SSLVERSION_DEFAULT:
+ /* we try to figure out version */
+ req_method = SSLv23_client_method();
+ break;
+ case CURL_SSLVERSION_TLSv1:
+ req_method = TLSv1_client_method();
+ break;
+ case CURL_SSLVERSION_SSLv3:
+ req_method = SSLv3_client_method();
+ break;
+ default:
+ req_method = TLSv1_client_method();
+ }
+
+ if(!req_method) {
+ failf(data, "SSL: couldn't create a method!");
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ if(conssl->ctx)
+ SSL_CTX_free(conssl->ctx);
+ conssl->ctx = SSL_CTX_new(req_method);
+
+ if(!conssl->ctx) {
+ failf(data, "SSL: couldn't create a context!");
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ /* load trusted cacert */
+ if(data->set.str[STRING_SSL_CAFILE]) {
+ if (!SSL_CTX_load_verify_locations(conssl->ctx,
+ data->set.str[STRING_SSL_CAFILE],
+ data->set.str[STRING_SSL_CAPATH])) {
+ if (data->set.ssl.verifypeer) {
+ /* Fail if we insiste on successfully verifying the server. */
+ failf(data,"error setting certificate verify locations:\n"
+ " CAfile: %s\n CApath: %s\n",
+ data->set.str[STRING_SSL_CAFILE]?
+ data->set.str[STRING_SSL_CAFILE]: "none",
+ data->set.str[STRING_SSL_CAPATH]?
+ data->set.str[STRING_SSL_CAPATH] : "none");
+ return CURLE_SSL_CACERT_BADFILE;
+ }
+ else {
+ /* Just continue with a warning if no strict certificate
+ verification is required. */
+ infof(data, "error setting certificate verify locations,"
+ " continuing anyway:\n");
+ }
+ }
+ else {
+ /* Everything is fine. */
+ infof(data, "successfully set certificate verify locations:\n");
+ }
+ infof(data,
+ " CAfile: %s\n"
+ " CApath: %s\n",
+ data->set.str[STRING_SSL_CAFILE] ? data->set.str[STRING_SSL_CAFILE]:
+ "none",
+ data->set.str[STRING_SSL_CAPATH] ? data->set.str[STRING_SSL_CAPATH]:
+ "none");
+ }
+
+ /* Load the client certificate, and private key */
+ if(data->set.str[STRING_CERT] && data->set.str[STRING_KEY]) {
+ int file_type = do_file_type(data->set.str[STRING_CERT_TYPE]);
+
+ if (SSL_CTX_use_certificate_file(conssl->ctx, data->set.str[STRING_CERT],
+ file_type) != 1) {
+ failf(data, "unable to use client certificate (no key or wrong pass"
+ " phrase?)");
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+
+ file_type = do_file_type(data->set.str[STRING_KEY_TYPE]);
+ if (SSL_CTX_use_PrivateKey_file(conssl->ctx, data->set.str[STRING_KEY],
+ file_type) != 1) {
+ failf(data, "unable to set private key");
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+ }
+
+ /* SSL always tries to verify the peer, this only says whether it should
+ * fail to connect if the verification fails, or if it should continue
+ * anyway. In the latter case the result of the verification is checked with
+ * SSL_get_verify_result() below. */
+ SSL_CTX_set_verify(conssl->ctx,
+ data->set.ssl.verifypeer?SSL_VERIFY_PEER:SSL_VERIFY_NONE,
+ NULL);
+
+ /* Let's make an SSL structure */
+ if (conssl->handle)
+ SSL_free(conssl->handle);
+ conssl->handle = SSL_new(conssl->ctx);
+ if (!conssl->handle) {
+ failf(data, "SSL: couldn't create a context (handle)!");
+ return CURLE_OUT_OF_MEMORY;
+ }
+
+ /* Check if there's a cached ID we can/should use here! */
+ if(!Curl_ssl_getsessionid(conn, &ssl_sessionid, NULL)) {
+ /* we got a session id, use it! */
+ if(!SSL_set_session(conssl->handle, ssl_sessionid)) {
+ failf(data, "SSL: SSL_set_session failed: %s",
+ ERR_error_string(SSL_get_error(conssl->handle, 0),NULL));
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+ /* Informational message */
+ infof (data, "SSL re-using session ID\n");
+ }
+
+ /* pass the raw socket into the SSL layer */
+ if (!SSL_set_fd(conssl->handle, (int)sockfd)) {
+ failf(data, "SSL: SSL_set_fd failed");
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+
+ conssl->connecting_state = ssl_connect_2;
+ return CURLE_OK;
+}
+
+
+static CURLcode
+cyassl_connect_step2(struct connectdata *conn,
+ int sockindex)
+{
+ int ret = -1;
+ struct SessionHandle *data = conn->data;
+ struct ssl_connect_data* conssl = &conn->ssl[sockindex];
+ curl_socket_t sockfd = conn->sock[sockindex];
+
+ infof(data, "CyaSSL: Connecting to %s:%d\n",
+ conn->host.name, conn->remote_port);
+
+ conn->recv[sockindex] = cyassl_recv;
+ conn->send[sockindex] = cyassl_send;
+
+ ret = SSL_connect(conssl->handle);
+ if (ret != 1) {
+ char error_buffer[80];
+ int detail = SSL_get_error(conssl->handle, ret);
+
+ if (SSL_ERROR_WANT_READ == detail) {
+ conssl->connecting_state = ssl_connect_2_reading;
+ return CURLE_OK;
+ }
+
+ if (SSL_ERROR_WANT_WRITE == detail) {
+ conssl->connecting_state = ssl_connect_2_writing;
+ return CURLE_OK;
+ }
+
+ failf(data, "SSL_connect failed with error %d: %s", detail,
+ ERR_error_string(detail, error_buffer));
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+
+ conssl->connecting_state = ssl_connect_3;
+ infof(data, "SSL connected");
+
+ return CURLE_OK;
+}
+
+
+static CURLcode
+cyassl_connect_step3(struct connectdata *conn,
+ int sockindex)
+{
+ CURLcode retcode = CURLE_OK;
+ void *old_ssl_sessionid=NULL;
+ struct SessionHandle *data = conn->data;
+ struct ssl_connect_data *connssl = &conn->ssl[sockindex];
+ int incache;
+ SSL_SESSION *our_ssl_sessionid;
+
+ DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
+
+ our_ssl_sessionid = SSL_get_session(connssl->handle);
+
+ incache = !(Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL));
+ if (incache) {
+ if (old_ssl_sessionid != our_ssl_sessionid) {
+ infof(data, "old SSL session ID is stale, removing\n");
+ Curl_ssl_delsessionid(conn, old_ssl_sessionid);
+ incache = FALSE;
+ }
+ }
+ if (!incache) {
+ retcode = Curl_ssl_addsessionid(conn, our_ssl_sessionid,
+ 0 /* unknown size */);
+ if(retcode) {
+ failf(data, "failed to store ssl session");
+ return retcode;
+ }
+ }
+
+ connssl->connecting_state = ssl_connect_done;
+
+ return retcode;
+}
+
+
+static ssize_t cyassl_send(struct connectdata *conn,
+ int sockindex,
+ const void *mem,
+ size_t len,
+ CURLcode *curlcode)
+{
+ char error_buffer[80];
+ int memlen = (len > (size_t)INT_MAX) ? INT_MAX : (int)len;
+ int rc = SSL_write(conn->ssl[sockindex].handle, mem, memlen);
+
+ if (rc < 0) {
+ int err = SSL_get_error(conn->ssl[sockindex].handle, rc);
+
+ switch(err) {
+ case SSL_ERROR_WANT_READ:
+ case SSL_ERROR_WANT_WRITE:
+ /* there's data pending, re-invoke SSL_write() */
+ *curlcode = CURLE_AGAIN;
+ return -1;
+ default:
+ failf(conn->data, "SSL write: %s, errno %d",
+ ERR_error_string(err, error_buffer),
+ SOCKERRNO);
+ *curlcode = CURLE_SEND_ERROR;
+ return -1;
+ }
+ }
+ return rc;
+}
+
+void Curl_cyassl_close_all(struct SessionHandle *data)
+{
+ (void)data;
+}
+
+void Curl_cyassl_close(struct connectdata *conn, int sockindex)
+{
+ struct ssl_connect_data *conssl = &conn->ssl[sockindex];
+
+ if(conssl->handle) {
+ (void)SSL_shutdown(conssl->handle);
+ SSL_free (conssl->handle);
+ conssl->handle = NULL;
+ }
+ if(conssl->ctx) {
+ SSL_CTX_free (conssl->ctx);
+ conssl->ctx = NULL;
+ }
+}
+
+static ssize_t cyassl_recv(struct connectdata *conn,
+ int num,
+ char *buf,
+ size_t buffersize,
+ CURLcode *curlcode)
+{
+ char error_buffer[80];
+ int buffsize = (buffersize > (size_t)INT_MAX) ? INT_MAX : (int)buffersize;
+ int nread = SSL_read(conn->ssl[num].handle, buf, buffsize);
+
+ if (nread < 0) {
+ int err = SSL_get_error(conn->ssl[num].handle, nread);
+
+ switch(err) {
+ case SSL_ERROR_ZERO_RETURN: /* no more data */
+ break;
+ case SSL_ERROR_WANT_READ:
+ case SSL_ERROR_WANT_WRITE:
+ /* there's data pending, re-invoke SSL_read() */
+ *curlcode = CURLE_AGAIN;
+ return -1;
+ default:
+ failf(conn->data, "SSL read: %s, errno %d",
+ ERR_error_string(err, error_buffer),
+ SOCKERRNO);
+ *curlcode = CURLE_RECV_ERROR;
+ return -1;
+ }
+ }
+ return nread;
+}
+
+
+void Curl_cyassl_session_free(void *ptr)
+{
+ /* CyaSSL reuses sessions on own, no free */
+}
+
+
+size_t Curl_cyassl_version(char *buffer, size_t size)
+{
+#ifdef CYASSL_VERSION
+ return snprintf(buffer, size, "CyaSSL/%s", CYASSL_VERSION);
+#else
+ return snprintf(buffer, size, "CyaSSL/%s", "<1.8.8");
+#endif
+}
+
+
+int Curl_cyassl_init(void)
+{
+ InitCyaSSL();
+
+ return 1;
+}
+
+
+bool Curl_cyassl_data_pending(const struct connectdata* conn, int connindex)
+{
+ if (conn->ssl[connindex].handle) /* SSL is in use */
+ return (bool)(0 != SSL_pending(conn->ssl[connindex].handle));
+ else
+ return FALSE;
+}
+
+
+/*
+ * This function is called to shut down the SSL layer but keep the
+ * socket open (CCC - Clear Command Channel)
+ */
+int Curl_cyassl_shutdown(struct connectdata *conn, int sockindex)
+{
+ int retval = 0;
+ struct ssl_connect_data *connssl = &conn->ssl[sockindex];
+
+ if(connssl->handle) {
+ SSL_free (connssl->handle);
+ connssl->handle = NULL;
+ }
+ return retval;
+}
+
+
+static CURLcode
+cyassl_connect_common(struct connectdata *conn,
+ int sockindex,
+ bool nonblocking,
+ bool *done)
+{
+ CURLcode retcode;
+ struct SessionHandle *data = conn->data;
+ struct ssl_connect_data *connssl = &conn->ssl[sockindex];
+ curl_socket_t sockfd = conn->sock[sockindex];
+ long timeout_ms;
+ int what;
+
+ /* check if the connection has already been established */
+ if(ssl_connection_complete == connssl->state) {
+ *done = TRUE;
+ return CURLE_OK;
+ }
+
+ if(ssl_connect_1==connssl->connecting_state) {
+ /* Find out how much more time we're allowed */
+ timeout_ms = Curl_timeleft(data, NULL, TRUE);
+
+ if(timeout_ms < 0) {
+ /* no need to continue if time already is up */
+ failf(data, "SSL connection timeout");
+ return CURLE_OPERATION_TIMEDOUT;
+ }
+ retcode = cyassl_connect_step1(conn, sockindex);
+ if(retcode)
+ return retcode;
+ }
+
+ while(ssl_connect_2 == connssl->connecting_state ||
+ ssl_connect_2_reading == connssl->connecting_state ||
+ ssl_connect_2_writing == connssl->connecting_state) {
+
+ /* check allowed time left */
+ timeout_ms = Curl_timeleft(data, NULL, TRUE);
+
+ if(timeout_ms < 0) {
+ /* no need to continue if time already is up */
+ failf(data, "SSL connection timeout");
+ return CURLE_OPERATION_TIMEDOUT;
+ }
+
+ /* if ssl is expecting something, check if it's available. */
+ if(connssl->connecting_state == ssl_connect_2_reading
+ || connssl->connecting_state == ssl_connect_2_writing) {
+
+ curl_socket_t writefd = ssl_connect_2_writing==
+ connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
+ curl_socket_t readfd = ssl_connect_2_reading==
+ connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
+
+ what = Curl_socket_ready(readfd, writefd,
+ nonblocking?0:(int)timeout_ms);
+ if(what < 0) {
+ /* fatal error */
+ failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
+ return CURLE_SSL_CONNECT_ERROR;
+ }
+ else if(0 == what) {
+ if(nonblocking) {
+ *done = FALSE;
+ return CURLE_OK;
+ }
+ else {
+ /* timeout */
+ failf(data, "SSL connection timeout");
+ return CURLE_OPERATION_TIMEDOUT;
+ }
+ }
+ /* socket is readable or writable */
+ }
+
+ /* Run transaction, and return to the caller if it failed or if
+ * this connection is part of a multi handle and this loop would
+ * execute again. This permits the owner of a multi handle to
+ * abort a connection attempt before step2 has completed while
+ * ensuring that a client using select() or epoll() will always
+ * have a valid fdset to wait on.
+ */
+ retcode = cyassl_connect_step2(conn, sockindex);
+ if(retcode || (nonblocking &&
+ (ssl_connect_2 == connssl->connecting_state ||
+ ssl_connect_2_reading == connssl->connecting_state ||
+ ssl_connect_2_writing == connssl->connecting_state)))
+ return retcode;
+
+ } /* repeat step2 until all transactions are done. */
+
+ if(ssl_connect_3==connssl->connecting_state) {
+ retcode = cyassl_connect_step3(conn, sockindex);
+ if(retcode)
+ return retcode;
+ }
+
+ if(ssl_connect_done==connssl->connecting_state) {
+ connssl->state = ssl_connection_complete;
+ conn->recv[sockindex] = cyassl_recv;
+ conn->send[sockindex] = cyassl_send;
+ *done = TRUE;
+ }
+ else
+ *done = FALSE;
+
+ /* Reset our connect state machine */
+ connssl->connecting_state = ssl_connect_1;
+
+ return CURLE_OK;
+}
+
+
+CURLcode
+Curl_cyassl_connect_nonblocking(struct connectdata *conn,
+ int sockindex,
+ bool *done)
+{
+ return cyassl_connect_common(conn, sockindex, TRUE, done);
+}
+
+
+CURLcode
+Curl_cyassl_connect(struct connectdata *conn,
+ int sockindex)
+{
+ CURLcode retcode;
+ bool done = FALSE;
+
+ retcode = cyassl_connect_common(conn, sockindex, FALSE, &done);
+ if(retcode)
+ return retcode;
+
+ DEBUGASSERT(done);
+
+ return CURLE_OK;
+}
+
+#endif
projects / platform / upstream / curl.git / commitdiff