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curl/lib/polarssl.c
Hoi-Ho Chan 83305cbf9f Remove support for BSD version of PolarSSL 
"The BSD version of PolarSSL was made for migratory purposes only and is not
maintained. The GPL version of PolarSSL is actually the only actively
developed version, so I would be very reluctant to use the BSD version." /
Paul Bakker, PolarSSL hacker.

Signed-off-by: Hoi-Ho Chan <hoiho.chan@gmail.com>
2010-05-13 21:50:52 +02:00

376 lines
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2010, 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 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 PolarSSL-specific code for the TLS/SSL layer. No code
* but sslgen.c should ever call or use these functions.
*
*/
#include "setup.h"
#ifdef USE_POLARSSL
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#include <polarssl/net.h>
#include <polarssl/ssl.h>
#include <polarssl/havege.h>
#include <polarssl/certs.h>
#include <polarssl/x509.h>
#include "urldata.h"
#include "sendf.h"
#include "inet_pton.h"
#include "polarssl.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"
/* Define this to enable lots of debugging for PolarSSL */
#undef POLARSSL_DEBUG
#ifdef POLARSSL_DEBUG
static void polarssl_debug(void *context, int level, char *line)
{
struct SessionHandle *data = NULL;
if(!context)
return;
data = (struct SessionHandle *)context;
infof(data, "%s", line);
}
#else
#endif
static Curl_recv polarssl_recv;
static Curl_send polarssl_send;
/*
* This function loads all the client/CA certificates and CRLs. Setup the TLS
* layer and do all necessary magic.
*/
CURLcode
Curl_polarssl_connect(struct connectdata *conn,
int sockindex)
{
struct SessionHandle *data = conn->data;
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;
size_t old_session_size = 0;
char buffer[1024];
if(conn->ssl[sockindex].state == ssl_connection_complete)
return CURLE_OK;
/* 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 */
}
havege_init(&conn->ssl[sockindex].hs);
/* Load the trusted CA */
memset(&conn->ssl[sockindex].cacert, 0, sizeof(x509_cert));
if(data->set.str[STRING_SSL_CAFILE]) {
ret = x509parse_crtfile(&conn->ssl[sockindex].cacert,
data->set.str[STRING_SSL_CAFILE]);
if(ret) {
failf(data, "Error reading ca cert file %s: -0x%04X",
data->set.str[STRING_SSL_CAFILE], -ret);
if(data->set.ssl.verifypeer)
return CURLE_SSL_CACERT_BADFILE;
}
}
/* Load the client certificate */
memset(&conn->ssl[sockindex].clicert, 0, sizeof(x509_cert));
if(data->set.str[STRING_CERT]) {
ret = x509parse_crtfile(&conn->ssl[sockindex].clicert,
data->set.str[STRING_CERT]);
if(ret) {
failf(data, "Error reading client cert file %s: -0x%04X",
data->set.str[STRING_CERT], -ret);
return CURLE_SSL_CERTPROBLEM;
}
}
/* Load the client private key */
if(data->set.str[STRING_KEY]) {
ret = x509parse_keyfile(&conn->ssl[sockindex].rsa,
data->set.str[STRING_KEY],
data->set.str[STRING_KEY_PASSWD]);
if(ret) {
failf(data, "Error reading private key %s: -0x%04X",
data->set.str[STRING_KEY], -ret);
return CURLE_SSL_CERTPROBLEM;
}
}
/* Load the CRL */
memset(&conn->ssl[sockindex].crl, 0, sizeof(x509_crl));
if(data->set.str[STRING_SSL_CRLFILE]) {
ret = x509parse_crlfile(&conn->ssl[sockindex].crl,
data->set.str[STRING_SSL_CRLFILE]);
if(ret) {
failf(data, "Error reading CRL file %s: -0x%04X",
data->set.str[STRING_SSL_CRLFILE], -ret);
return CURLE_SSL_CRL_BADFILE;
}
}
infof(data, "PolarSSL: Connected to %s:%d\n",
conn->host.name, conn->remote_port);
havege_init(&conn->ssl[sockindex].hs);
if(ssl_init(&conn->ssl[sockindex].ssl)) {
failf(data, "PolarSSL: ssl_init failed");
return CURLE_SSL_CONNECT_ERROR;
}
ssl_set_endpoint(&conn->ssl[sockindex].ssl, SSL_IS_CLIENT);
ssl_set_authmode(&conn->ssl[sockindex].ssl, SSL_VERIFY_OPTIONAL);
ssl_set_rng(&conn->ssl[sockindex].ssl, havege_rand,
&conn->ssl[sockindex].hs);
ssl_set_bio(&conn->ssl[sockindex].ssl,
net_recv, &conn->sock[sockindex],
net_send, &conn->sock[sockindex]);
ssl_set_ciphers(&conn->ssl[sockindex].ssl, ssl_default_ciphers);
if(!Curl_ssl_getsessionid(conn, &old_session, &old_session_size)) {
memcpy(&conn->ssl[sockindex].ssn, old_session, old_session_size);
infof(data, "PolarSSL re-using session\n");
}
ssl_set_session(&conn->ssl[sockindex].ssl, 1, 600,
&conn->ssl[sockindex].ssn);
ssl_set_ca_chain(&conn->ssl[sockindex].ssl,
&conn->ssl[sockindex].cacert,
&conn->ssl[sockindex].crl,
conn->host.name);
ssl_set_own_cert(&conn->ssl[sockindex].ssl,
&conn->ssl[sockindex].clicert, &conn->ssl[sockindex].rsa);
if(!Curl_inet_pton(AF_INET, conn->host.name, &addr) &&
#ifdef ENABLE_IPV6
!Curl_inet_pton(AF_INET6, conn->host.name, &addr) &&
#endif
sni && ssl_set_hostname(&conn->ssl[sockindex].ssl, conn->host.name)) {
infof(data, "WARNING: failed to configure "
"server name indication (SNI) TLS extension\n");
}
infof(data, "PolarSSL: performing SSL/TLS handshake...\n");
#ifdef POLARSSL_DEBUG
ssl_set_dbg(&conn->ssl[sockindex].ssl, polarssl_debug, data);
#endif
do {
if (!(ret = ssl_handshake(&conn->ssl[sockindex].ssl))) {
break;
} else if(ret != POLARSSL_ERR_NET_TRY_AGAIN) {
failf(data, "ssl_handshake returned -0x%04X", -ret);
return CURLE_SSL_CONNECT_ERROR;
} else {
/* wait for data from server... */
long timeout_ms = Curl_timeleft(conn, NULL, TRUE);
if(timeout_ms < 0) {
failf(data, "SSL connection timeout");
return CURLE_OPERATION_TIMEDOUT;
}
switch(Curl_socket_ready(conn->sock[sockindex],
CURL_SOCKET_BAD, timeout_ms)) {
case 0:
failf(data, "SSL handshake timeout");
return CURLE_OPERATION_TIMEDOUT;
break;
case CURL_CSELECT_IN:
continue;
break;
default:
return CURLE_SSL_CONNECT_ERROR;
break;
}
}
} while (1);
infof(data, "PolarSSL: Handshake complete, cipher is %s\n",
ssl_get_cipher(&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\n");
if(ret & BADCERT_REVOKED)
failf(data, "Cert verify failed: BADCERT_REVOKED");
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_SSL_CACERT;
}
if(conn->ssl[sockindex].ssl.peer_cert) {
/* If the session was resumed, there will be no peer certs */
memset(buffer, 0, sizeof(buffer));
if(x509parse_cert_info(buffer, sizeof(buffer), (char *)"* ",
conn->ssl[sockindex].ssl.peer_cert) != -1)
infof(data, "Dumping cert info:\n%s\n", buffer);
}
conn->ssl[sockindex].state = ssl_connection_complete;
conn->recv[sockindex] = polarssl_recv;
conn->send[sockindex] = polarssl_send;
/* Save the current session data for possible re-use */
{
void *new_session = malloc(sizeof(conn->ssl[sockindex].ssn));
if(new_session) {
memcpy(new_session, &conn->ssl[sockindex].ssn,
sizeof(conn->ssl[sockindex].ssn));
if(old_session)
Curl_ssl_delsessionid(conn, old_session);
return Curl_ssl_addsessionid(conn, new_session,
sizeof(conn->ssl[sockindex].ssn));
}
}
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_TRY_AGAIN) ?
CURLE_AGAIN : CURLE_SEND_ERROR;
ret = -1;
}
return ret;
}
void Curl_polarssl_close_all(struct SessionHandle *data)
{
(void)data;
}
void Curl_polarssl_close(struct connectdata *conn, int sockindex)
{
rsa_free(&conn->ssl[sockindex].rsa);
x509_free(&conn->ssl[sockindex].clicert);
x509_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) {
*curlcode = (ret == POLARSSL_ERR_NET_TRY_AGAIN) ?
CURLE_AGAIN : CURLE_RECV_ERROR;
return -1;
}
len = ret;
return len;
}
void Curl_polarssl_session_free(void *ptr)
{
free(ptr);
}
size_t Curl_polarssl_version(char *buffer, size_t size)
{
return snprintf(buffer, size, "PolarSSL");
}
#endif
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