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332e8d6164
curl/lib/vtls/polarssl.c
Ivan Avdeev 31c521b047 vtls: fix ssl session cache race condition 
Sessionid cache management is inseparable from managing individual
session lifetimes. E.g. for reference-counted sessions (like those in
SChannel and OpenSSL engines) every session addition and removal
should be accompanied with refcount increment and decrement
respectively. Failing to do so synchronously leads to a race condition
that causes symptoms like use-after-free and memory corruption.
This commit:
 - makes existing session cache locking explicit, thus allowing
   individual engines to manage lock's scope.
 - fixes OpenSSL and SChannel engines by putting refcount management
   inside this lock's scope in relevant places.
 - adds these explicit locking calls to other engines that use
   sessionid cache to accommodate for this change. Note, however,
   that it is unknown whether any of these engines could also have
   this race.

Bug: https://github.com/curl/curl/issues/815
Fixes #815
Closes #847
2016-06-01 09:40:55 +02:00

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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2012 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 2010 - 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
*
* 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 https://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 PolarSSL-specific code for the TLS/SSL layer. No code
* but vtls.c should ever call or use these functions.
*
*/
#include "curl_setup.h"
#ifdef USE_POLARSSL
#include <polarssl/net.h>
#include <polarssl/ssl.h>
#include <polarssl/certs.h>
#include <polarssl/x509.h>
#include <polarssl/version.h>
#include <polarssl/sha256.h>
#if POLARSSL_VERSION_NUMBER < 0x01030000
#error too old PolarSSL
#endif
#include <polarssl/error.h>
#include <polarssl/entropy.h>
#include <polarssl/ctr_drbg.h>
#include "urldata.h"
#include "sendf.h"
#include "inet_pton.h"
#include "polarssl.h"
#include "vtls.h"
#include "parsedate.h"
#include "connect.h" /* for the connect timeout */
#include "select.h"
#include "rawstr.h"
#include "polarssl_threadlock.h"
#include "curl_printf.h"
#include "curl_memory.h"
/* The last #include file should be: */
#include "memdebug.h"
/* See https://tls.mbed.org/discussions/generic/
howto-determine-exact-buffer-len-for-mbedtls_pk_write_pubkey_der
*/
#define RSA_PUB_DER_MAX_BYTES (38 + 2 * POLARSSL_MPI_MAX_SIZE)
#define ECP_PUB_DER_MAX_BYTES (30 + 2 * POLARSSL_ECP_MAX_BYTES)
#define PUB_DER_MAX_BYTES (RSA_PUB_DER_MAX_BYTES > ECP_PUB_DER_MAX_BYTES ? \
RSA_PUB_DER_MAX_BYTES : ECP_PUB_DER_MAX_BYTES)
/* apply threading? */
#if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32)
#define THREADING_SUPPORT
#endif
#if defined(THREADING_SUPPORT)
static entropy_context entropy;
static int entropy_init_initialized = 0;
/* start of entropy_init_mutex() */
static void entropy_init_mutex(entropy_context *ctx)
{
/* lock 0 = entropy_init_mutex() */
Curl_polarsslthreadlock_lock_function(0);
if(entropy_init_initialized == 0) {
entropy_init(ctx);
entropy_init_initialized = 1;
}
Curl_polarsslthreadlock_unlock_function(0);
}
/* end of entropy_init_mutex() */
/* start of entropy_func_mutex() */
static int entropy_func_mutex(void *data, unsigned char *output, size_t len)
{
int ret;
/* lock 1 = entropy_func_mutex() */
Curl_polarsslthreadlock_lock_function(1);
ret = entropy_func(data, output, len);
Curl_polarsslthreadlock_unlock_function(1);
return ret;
}
/* end of entropy_func_mutex() */
#endif /* THREADING_SUPPORT */
/* Define this to enable lots of debugging for PolarSSL */
#undef POLARSSL_DEBUG
#ifdef POLARSSL_DEBUG
static void polarssl_debug(void *context, int level, const char *line)
{
struct SessionHandle *data = NULL;
if(!context)
return;
data = (struct SessionHandle *)context;
infof(data, "%s", line);
(void) level;
}
#else
#endif
/* ALPN for http2? */
#ifdef POLARSSL_SSL_ALPN
# define HAS_ALPN
#endif
static Curl_recv polarssl_recv;
static Curl_send polarssl_send;
static CURLcode
polarssl_connect_step1(struct connectdata *conn,
int sockindex)
{
struct SessionHandle *data = conn->data;
struct ssl_connect_data* connssl = &conn->ssl[sockindex];
bool sni = TRUE; /* default is SNI enabled */
int ret = -1;
#ifdef ENABLE_IPV6
struct in6_addr addr;
#else
struct in_addr addr;
#endif
void *old_session = NULL;
char errorbuf[128];
errorbuf[0]=0;
/* PolarSSL only supports SSLv3 and TLSv1 */
if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) {
failf(data, "PolarSSL does not support SSLv2");
return CURLE_SSL_CONNECT_ERROR;
}
else if(data->set.ssl.version == CURL_SSLVERSION_SSLv3)
sni = FALSE; /* SSLv3 has no SNI */
#ifdef THREADING_SUPPORT
entropy_init_mutex(&entropy);
if((ret = ctr_drbg_init(&connssl->ctr_drbg, entropy_func_mutex, &entropy,
NULL, 0)) != 0) {
#ifdef POLARSSL_ERROR_C
error_strerror(ret, errorbuf, sizeof(errorbuf));
#endif /* POLARSSL_ERROR_C */
failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n",
-ret, errorbuf);
}
#else
entropy_init(&connssl->entropy);
if((ret = ctr_drbg_init(&connssl->ctr_drbg, entropy_func, &connssl->entropy,
NULL, 0)) != 0) {
#ifdef POLARSSL_ERROR_C
error_strerror(ret, errorbuf, sizeof(errorbuf));
#endif /* POLARSSL_ERROR_C */
failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n",
-ret, errorbuf);
}
#endif /* THREADING_SUPPORT */
/* Load the trusted CA */
memset(&connssl->cacert, 0, sizeof(x509_crt));
if(data->set.str[STRING_SSL_CAFILE]) {
ret = x509_crt_parse_file(&connssl->cacert,
data->set.str[STRING_SSL_CAFILE]);
if(ret<0) {
#ifdef POLARSSL_ERROR_C
error_strerror(ret, errorbuf, sizeof(errorbuf));
#endif /* POLARSSL_ERROR_C */
failf(data, "Error reading ca cert file %s - PolarSSL: (-0x%04X) %s",
data->set.str[STRING_SSL_CAFILE], -ret, errorbuf);
if(data->set.ssl.verifypeer)
return CURLE_SSL_CACERT_BADFILE;
}
}
if(data->set.str[STRING_SSL_CAPATH]) {
ret = x509_crt_parse_path(&connssl->cacert,
data->set.str[STRING_SSL_CAPATH]);
if(ret<0) {
#ifdef POLARSSL_ERROR_C
error_strerror(ret, errorbuf, sizeof(errorbuf));
#endif /* POLARSSL_ERROR_C */
failf(data, "Error reading ca cert path %s - PolarSSL: (-0x%04X) %s",
data->set.str[STRING_SSL_CAPATH], -ret, errorbuf);
if(data->set.ssl.verifypeer)
return CURLE_SSL_CACERT_BADFILE;
}
}
/* Load the client certificate */
memset(&connssl->clicert, 0, sizeof(x509_crt));
if(data->set.str[STRING_CERT]) {
ret = x509_crt_parse_file(&connssl->clicert,
data->set.str[STRING_CERT]);
if(ret) {
#ifdef POLARSSL_ERROR_C
error_strerror(ret, errorbuf, sizeof(errorbuf));
#endif /* POLARSSL_ERROR_C */
failf(data, "Error reading client cert file %s - PolarSSL: (-0x%04X) %s",
data->set.str[STRING_CERT], -ret, errorbuf);
return CURLE_SSL_CERTPROBLEM;
}
}
/* Load the client private key */
if(data->set.str[STRING_KEY]) {
pk_context pk;
pk_init(&pk);
ret = pk_parse_keyfile(&pk, data->set.str[STRING_KEY],
data->set.str[STRING_KEY_PASSWD]);
if(ret == 0 && !pk_can_do(&pk, POLARSSL_PK_RSA))
ret = POLARSSL_ERR_PK_TYPE_MISMATCH;
if(ret == 0)
rsa_copy(&connssl->rsa, pk_rsa(pk));
else
rsa_free(&connssl->rsa);
pk_free(&pk);
if(ret) {
#ifdef POLARSSL_ERROR_C
error_strerror(ret, errorbuf, sizeof(errorbuf));
#endif /* POLARSSL_ERROR_C */
failf(data, "Error reading private key %s - PolarSSL: (-0x%04X) %s",
data->set.str[STRING_KEY], -ret, errorbuf);
return CURLE_SSL_CERTPROBLEM;
}
}
/* Load the CRL */
memset(&connssl->crl, 0, sizeof(x509_crl));
if(data->set.str[STRING_SSL_CRLFILE]) {
ret = x509_crl_parse_file(&connssl->crl,
data->set.str[STRING_SSL_CRLFILE]);
if(ret) {
#ifdef POLARSSL_ERROR_C
error_strerror(ret, errorbuf, sizeof(errorbuf));
#endif /* POLARSSL_ERROR_C */
failf(data, "Error reading CRL file %s - PolarSSL: (-0x%04X) %s",
data->set.str[STRING_SSL_CRLFILE], -ret, errorbuf);
return CURLE_SSL_CRL_BADFILE;
}
}
infof(data, "PolarSSL: Connecting to %s:%d\n",
conn->host.name, conn->remote_port);
if(ssl_init(&connssl->ssl)) {
failf(data, "PolarSSL: ssl_init failed");
return CURLE_SSL_CONNECT_ERROR;
}
switch(data->set.ssl.version) {
default:
case CURL_SSLVERSION_DEFAULT:
case CURL_SSLVERSION_TLSv1:
ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
SSL_MINOR_VERSION_1);
break;
case CURL_SSLVERSION_SSLv3:
ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
SSL_MINOR_VERSION_0);
ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
SSL_MINOR_VERSION_0);
infof(data, "PolarSSL: Forced min. SSL Version to be SSLv3\n");
break;
case CURL_SSLVERSION_TLSv1_0:
ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
SSL_MINOR_VERSION_1);
ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
SSL_MINOR_VERSION_1);
infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.0\n");
break;
case CURL_SSLVERSION_TLSv1_1:
ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
SSL_MINOR_VERSION_2);
ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
SSL_MINOR_VERSION_2);
infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.1\n");
break;
case CURL_SSLVERSION_TLSv1_2:
ssl_set_min_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
SSL_MINOR_VERSION_3);
ssl_set_max_version(&connssl->ssl, SSL_MAJOR_VERSION_3,
SSL_MINOR_VERSION_3);
infof(data, "PolarSSL: Forced min. SSL Version to be TLS 1.2\n");
break;
}
ssl_set_endpoint(&connssl->ssl, SSL_IS_CLIENT);
ssl_set_authmode(&connssl->ssl, SSL_VERIFY_OPTIONAL);
ssl_set_rng(&connssl->ssl, ctr_drbg_random,
&connssl->ctr_drbg);
ssl_set_bio(&connssl->ssl,
net_recv, &conn->sock[sockindex],
net_send, &conn->sock[sockindex]);
ssl_set_ciphersuites(&connssl->ssl, ssl_list_ciphersuites());
Curl_ssl_sessionid_lock(conn);
if(!Curl_ssl_getsessionid(conn, &old_session, NULL)) {
ret = ssl_set_session(&connssl->ssl, old_session);
Curl_ssl_sessionid_unlock(conn);
if(ret) {
failf(data, "ssl_set_session returned -0x%x", -ret);
return CURLE_SSL_CONNECT_ERROR;
}
infof(data, "PolarSSL re-using session\n");
}
ssl_set_ca_chain(&connssl->ssl,
&connssl->cacert,
&connssl->crl,
conn->host.name);
ssl_set_own_cert_rsa(&connssl->ssl,
&connssl->clicert, &connssl->rsa);
if(ssl_set_hostname(&connssl->ssl, conn->host.name)) {
/* ssl_set_hostname() sets the name to use in CN/SAN checks *and* the name
to set in the SNI extension. So even if curl connects to a host
specified as an IP address, this function must be used. */
failf(data, "couldn't set hostname in PolarSSL");
return CURLE_SSL_CONNECT_ERROR;
}
#ifdef HAS_ALPN
if(conn->bits.tls_enable_alpn) {
static const char* protocols[3];
int cur = 0;
#ifdef USE_NGHTTP2
if(data->set.httpversion >= CURL_HTTP_VERSION_2) {
protocols[cur++] = NGHTTP2_PROTO_VERSION_ID;
infof(data, "ALPN, offering %s\n", NGHTTP2_PROTO_VERSION_ID);
}
#endif
protocols[cur++] = ALPN_HTTP_1_1;
infof(data, "ALPN, offering %s\n", ALPN_HTTP_1_1);
protocols[cur] = NULL;
ssl_set_alpn_protocols(&connssl->ssl, protocols);
}
#endif
#ifdef POLARSSL_DEBUG
ssl_set_dbg(&connssl->ssl, polarssl_debug, data);
#endif
connssl->connecting_state = ssl_connect_2;
return CURLE_OK;
}
static CURLcode
polarssl_connect_step2(struct connectdata *conn,
int sockindex)
{
int ret;
struct SessionHandle *data = conn->data;
struct ssl_connect_data* connssl = &conn->ssl[sockindex];
char buffer[1024];
char errorbuf[128];
errorbuf[0] = 0;
conn->recv[sockindex] = polarssl_recv;
conn->send[sockindex] = polarssl_send;
ret = ssl_handshake(&connssl->ssl);
switch(ret) {
case 0:
break;
case POLARSSL_ERR_NET_WANT_READ:
connssl->connecting_state = ssl_connect_2_reading;
return CURLE_OK;
case POLARSSL_ERR_NET_WANT_WRITE:
connssl->connecting_state = ssl_connect_2_writing;
return CURLE_OK;
default:
#ifdef POLARSSL_ERROR_C
error_strerror(ret, errorbuf, sizeof(errorbuf));
#endif /* POLARSSL_ERROR_C */
failf(data, "ssl_handshake returned - PolarSSL: (-0x%04X) %s",
-ret, errorbuf);
return CURLE_SSL_CONNECT_ERROR;
}
infof(data, "PolarSSL: Handshake complete, cipher is %s\n",
ssl_get_ciphersuite(&conn->ssl[sockindex].ssl) );
ret = ssl_get_verify_result(&conn->ssl[sockindex].ssl);
if(ret && data->set.ssl.verifypeer) {
if(ret & BADCERT_EXPIRED)
failf(data, "Cert verify failed: BADCERT_EXPIRED");
if(ret & BADCERT_REVOKED) {
failf(data, "Cert verify failed: BADCERT_REVOKED");
return CURLE_SSL_CACERT;
}
if(ret & BADCERT_CN_MISMATCH)
failf(data, "Cert verify failed: BADCERT_CN_MISMATCH");
if(ret & BADCERT_NOT_TRUSTED)
failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED");
return CURLE_PEER_FAILED_VERIFICATION;
}
if(ssl_get_peer_cert(&(connssl->ssl))) {
/* If the session was resumed, there will be no peer certs */
memset(buffer, 0, sizeof(buffer));
if(x509_crt_info(buffer, sizeof(buffer), (char *)"* ",
ssl_get_peer_cert(&(connssl->ssl))) != -1)
infof(data, "Dumping cert info:\n%s\n", buffer);
}
/* adapted from mbedtls.c */
if(data->set.str[STRING_SSL_PINNEDPUBLICKEY]) {
int size;
CURLcode result;
x509_crt *p;
unsigned char pubkey[PUB_DER_MAX_BYTES];
const x509_crt *peercert;
peercert = ssl_get_peer_cert(&connssl->ssl);
if(!peercert || !peercert->raw.p || !peercert->raw.len) {
failf(data, "Failed due to missing peer certificate");
return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
}
p = calloc(1, sizeof(*p));
if(!p)
return CURLE_OUT_OF_MEMORY;
x509_crt_init(p);
/* Make a copy of our const peercert because pk_write_pubkey_der
needs a non-const key, for now.
https://github.com/ARMmbed/mbedtls/issues/396 */
if(x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) {
failf(data, "Failed copying peer certificate");
x509_crt_free(p);
free(p);
return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
}
size = pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES);
if(size <= 0) {
failf(data, "Failed copying public key from peer certificate");
x509_crt_free(p);
free(p);
return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
}
/* pk_write_pubkey_der writes data at the end of the buffer. */
result = Curl_pin_peer_pubkey(data,
data->set.str[STRING_SSL_PINNEDPUBLICKEY],
&pubkey[PUB_DER_MAX_BYTES - size], size);
if(result) {
x509_crt_free(p);
free(p);
return result;
}
x509_crt_free(p);
free(p);
}
#ifdef HAS_ALPN
if(conn->bits.tls_enable_alpn) {
const char *next_protocol = ssl_get_alpn_protocol(&connssl->ssl);
if(next_protocol != NULL) {
infof(data, "ALPN, server accepted to use %s\n", next_protocol);
#ifdef USE_NGHTTP2
if(!strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID,
NGHTTP2_PROTO_VERSION_ID_LEN)) {
conn->negnpn = CURL_HTTP_VERSION_2;
}
else
#endif
if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH)) {
conn->negnpn = CURL_HTTP_VERSION_1_1;
}
}
else
infof(data, "ALPN, server did not agree to a protocol\n");
}
#endif
connssl->connecting_state = ssl_connect_3;
infof(data, "SSL connected\n");
return CURLE_OK;
}
static CURLcode
polarssl_connect_step3(struct connectdata *conn,
int sockindex)
{
CURLcode retcode = CURLE_OK;
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
struct SessionHandle *data = conn->data;
void *old_ssl_sessionid = NULL;
ssl_session *our_ssl_sessionid;
int ret;
DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
our_ssl_sessionid = malloc(sizeof(ssl_session));
if(!our_ssl_sessionid)
return CURLE_OUT_OF_MEMORY;
ssl_session_init(our_ssl_sessionid);
ret = ssl_get_session(&connssl->ssl, our_ssl_sessionid);
if(ret) {
failf(data, "ssl_get_session returned -0x%x", -ret);
return CURLE_SSL_CONNECT_ERROR;
}
/* If there's already a matching session in the cache, delete it */
Curl_ssl_sessionid_lock(conn);
if(!Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL))
Curl_ssl_delsessionid(conn, old_ssl_sessionid);
retcode = Curl_ssl_addsessionid(conn, our_ssl_sessionid, 0);
Curl_ssl_sessionid_unlock(conn);
if(retcode) {
free(our_ssl_sessionid);
failf(data, "failed to store ssl session");
return retcode;
}
connssl->connecting_state = ssl_connect_done;
return CURLE_OK;
}
static ssize_t polarssl_send(struct connectdata *conn,
int sockindex,
const void *mem,
size_t len,
CURLcode *curlcode)
{
int ret = -1;
ret = ssl_write(&conn->ssl[sockindex].ssl,
(unsigned char *)mem, len);
if(ret < 0) {
*curlcode = (ret == POLARSSL_ERR_NET_WANT_WRITE) ?
CURLE_AGAIN : CURLE_SEND_ERROR;
ret = -1;
}
return ret;
}
void Curl_polarssl_close(struct connectdata *conn, int sockindex)
{
rsa_free(&conn->ssl[sockindex].rsa);
x509_crt_free(&conn->ssl[sockindex].clicert);
x509_crt_free(&conn->ssl[sockindex].cacert);
x509_crl_free(&conn->ssl[sockindex].crl);
ssl_free(&conn->ssl[sockindex].ssl);
}
static ssize_t polarssl_recv(struct connectdata *conn,
int num,
char *buf,
size_t buffersize,
CURLcode *curlcode)
{
int ret = -1;
ssize_t len = -1;
memset(buf, 0, buffersize);
ret = ssl_read(&conn->ssl[num].ssl, (unsigned char *)buf, buffersize);
if(ret <= 0) {
if(ret == POLARSSL_ERR_SSL_PEER_CLOSE_NOTIFY)
return 0;
*curlcode = (ret == POLARSSL_ERR_NET_WANT_READ) ?
CURLE_AGAIN : CURLE_RECV_ERROR;
return -1;
}
len = ret;
return len;
}
void Curl_polarssl_session_free(void *ptr)
{
ssl_session_free(ptr);
free(ptr);
}
/* 1.3.10 was the first rebranded version. All new releases (in 1.3 branch and
higher) will be mbed TLS branded.. */
size_t Curl_polarssl_version(char *buffer, size_t size)
{
unsigned int version = version_get_number();
return snprintf(buffer, size, "%s/%d.%d.%d",
version >= 0x01030A00?"mbedTLS":"PolarSSL",
version>>24, (version>>16)&0xff, (version>>8)&0xff);
}
static CURLcode
polarssl_connect_common(struct connectdata *conn,
int sockindex,
bool nonblocking,
bool *done)
{
CURLcode result;
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;
}
result = polarssl_connect_step1(conn, sockindex);
if(result)
return result;
}
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: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.
*/
result = polarssl_connect_step2(conn, sockindex);
if(result || (nonblocking &&
(ssl_connect_2 == connssl->connecting_state ||
ssl_connect_2_reading == connssl->connecting_state ||
ssl_connect_2_writing == connssl->connecting_state)))
return result;
} /* repeat step2 until all transactions are done. */
if(ssl_connect_3 == connssl->connecting_state) {
result = polarssl_connect_step3(conn, sockindex);
if(result)
return result;
}
if(ssl_connect_done == connssl->connecting_state) {
connssl->state = ssl_connection_complete;
conn->recv[sockindex] = polarssl_recv;
conn->send[sockindex] = polarssl_send;
*done = TRUE;
}
else
*done = FALSE;
/* Reset our connect state machine */
connssl->connecting_state = ssl_connect_1;
return CURLE_OK;
}
CURLcode
Curl_polarssl_connect_nonblocking(struct connectdata *conn,
int sockindex,
bool *done)
{
return polarssl_connect_common(conn, sockindex, TRUE, done);
}
CURLcode
Curl_polarssl_connect(struct connectdata *conn,
int sockindex)
{
CURLcode result;
bool done = FALSE;
result = polarssl_connect_common(conn, sockindex, FALSE, &done);
if(result)
return result;
DEBUGASSERT(done);
return CURLE_OK;
}
/*
* return 0 error initializing SSL
* return 1 SSL initialized successfully
*/
int Curl_polarssl_init(void)
{
return Curl_polarsslthreadlock_thread_setup();
}
void Curl_polarssl_cleanup(void)
{
(void)Curl_polarsslthreadlock_thread_cleanup();
}
#endif /* USE_POLARSSL */
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