diff options
Diffstat (limited to 'lib/polarssl.c')
| -rw-r--r-- | lib/polarssl.c | 596 |
1 files changed, 596 insertions, 0 deletions
diff --git a/lib/polarssl.c b/lib/polarssl.c new file mode 100644 index 000000000..ef074be13 --- /dev/null +++ b/lib/polarssl.c @@ -0,0 +1,596 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 2010, 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com> + * Copyright (C) 2012, 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 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 <polarssl/net.h> +#include <polarssl/ssl.h> +#include <polarssl/havege.h> +#include <polarssl/certs.h> +#include <polarssl/x509.h> +#include <polarssl/version.h> + +#include <polarssl/entropy.h> +#include <polarssl/ctr_drbg.h> + +#if POLARSSL_VERSION_NUMBER<0x01000000 +/* + Earlier versions of polarssl had no WANT_READ or WANT_WRITE, only TRY_AGAIN +*/ +#define POLARSSL_ERR_NET_WANT_READ POLARSSL_ERR_NET_TRY_AGAIN +#define POLARSSL_ERR_NET_WANT_WRITE POLARSSL_ERR_NET_TRY_AGAIN +#endif + +#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" + +/* version dependent differences */ +#if POLARSSL_VERSION_NUMBER < 0x01010000 +/* the old way */ +#define HAVEGE_RANDOM havege_rand +#else +/* from 1.1.0 */ +#define HAVEGE_RANDOM havege_random +#endif + +/* 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\n", line); +} +#else +#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; + size_t old_session_size = 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 */ + + havege_init(&connssl->hs); + + /* Load the trusted CA */ + memset(&connssl->cacert, 0, sizeof(x509_cert)); + + if(data->set.str[STRING_SSL_CAFILE]) { + ret = x509parse_crtfile(&connssl->cacert, + data->set.str[STRING_SSL_CAFILE]); + + if(ret<0) { + 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(&connssl->clicert, 0, sizeof(x509_cert)); + + if(data->set.str[STRING_CERT]) { + ret = x509parse_crtfile(&connssl->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(&connssl->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(&connssl->crl, 0, sizeof(x509_crl)); + + if(data->set.str[STRING_SSL_CRLFILE]) { + ret = x509parse_crlfile(&connssl->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: 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; + } + + ssl_set_endpoint(&connssl->ssl, SSL_IS_CLIENT); + ssl_set_authmode(&connssl->ssl, SSL_VERIFY_OPTIONAL); + + ssl_set_rng(&connssl->ssl, HAVEGE_RANDOM, + &connssl->hs); + ssl_set_bio(&connssl->ssl, + net_recv, &conn->sock[sockindex], + net_send, &conn->sock[sockindex]); + + +#if POLARSSL_VERSION_NUMBER<0x01000000 + ssl_set_ciphers(&connssl->ssl, ssl_default_ciphers); +#else + ssl_set_ciphersuites(&connssl->ssl, ssl_default_ciphersuites); +#endif + if(!Curl_ssl_getsessionid(conn, &old_session, &old_session_size)) { + memcpy(&connssl->ssn, old_session, old_session_size); + infof(data, "PolarSSL re-using session\n"); + } + +/* PolarSSL SVN revision r1316 to r1317, matching <1.2.0 is to cover Ubuntu's + 1.1.4 version and the like */ +#if POLARSSL_VERSION_NUMBER<0x01020000 + ssl_set_session(&connssl->ssl, 1, 600, + &connssl->ssn); +#else + ssl_set_session(&connssl->ssl, + &connssl->ssn); +#endif + + ssl_set_ca_chain(&connssl->ssl, + &connssl->cacert, + &connssl->crl, + conn->host.name); + + ssl_set_own_cert(&connssl->ssl, + &connssl->clicert, &connssl->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(&connssl->ssl, conn->host.name)) { + infof(data, "WARNING: failed to configure " + "server name indication (SNI) TLS extension\n"); + } + +#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]; + + conn->recv[sockindex] = polarssl_recv; + conn->send[sockindex] = polarssl_send; + + for(;;) { + if(!(ret = ssl_handshake(&connssl->ssl))) + break; + else if(ret != POLARSSL_ERR_NET_WANT_READ && + ret != POLARSSL_ERR_NET_WANT_WRITE) { + failf(data, "ssl_handshake returned -0x%04X", -ret); + return CURLE_SSL_CONNECT_ERROR; + } + else { + if(ret == POLARSSL_ERR_NET_WANT_READ) { + connssl->connecting_state = ssl_connect_2_reading; + return CURLE_OK; + } + if(ret == POLARSSL_ERR_NET_WANT_WRITE) { + connssl->connecting_state = ssl_connect_2_writing; + return CURLE_OK; + } + failf(data, "SSL_connect failed with error %d.", ret); + return CURLE_SSL_CONNECT_ERROR; + + } + } + + infof(data, "PolarSSL: Handshake complete, cipher is %s\n", +#if POLARSSL_VERSION_NUMBER<0x01000000 + ssl_get_cipher(&conn->ssl[sockindex].ssl) +#elif POLARSSL_VERSION_NUMBER >= 0x01010000 + ssl_get_ciphersuite(&conn->ssl[sockindex].ssl) +#else + ssl_get_ciphersuite_name(&conn->ssl[sockindex].ssl) +#endif + ); + + 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; + } + +/* PolarSSL SVN revision r1316 to r1317, matching <1.2.0 is to cover Ubuntu's + 1.1.4 version and the like */ +#if POLARSSL_VERSION_NUMBER<0x01020000 + if(conn->ssl[sockindex].ssl.peer_cert) { +#else + if(ssl_get_peer_cert(&(connssl->ssl))) { +#endif + /* If the session was resumed, there will be no peer certs */ + memset(buffer, 0, sizeof(buffer)); + +/* PolarSSL SVN revision r1316 to r1317, matching <1.2.0 is to cover Ubuntu's + 1.1.4 version and the like */ +#if POLARSSL_VERSION_NUMBER<0x01020000 + if(x509parse_cert_info(buffer, sizeof(buffer), (char *)"* ", + conn->ssl[sockindex].ssl.peer_cert) != -1) +#else + if(x509parse_cert_info(buffer, sizeof(buffer), (char *)"* ", + ssl_get_peer_cert(&(connssl->ssl))) != -1) +#endif + infof(data, "Dumping cert info:\n%s\n", buffer); + } + + 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 = &conn->ssl[sockindex].ssn ; + int incache; + + DEBUGASSERT(ssl_connect_3 == connssl->connecting_state); + + /* Save the current session data for possible re-use */ + 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) { + void *new_session = malloc(sizeof(ssl_session)); + + if(new_session) { + memcpy(new_session, our_ssl_sessionid, + sizeof(ssl_session)); + + retcode = Curl_ssl_addsessionid(conn, new_session, + sizeof(ssl_session)); + } + else { + retcode = CURLE_OUT_OF_MEMORY; + } + + if(retcode) { + 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_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) { + 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) +{ + free(ptr); +} + +size_t Curl_polarssl_version(char *buffer, size_t size) +{ + unsigned int version = version_get_number(); + return snprintf(buffer, size, "PolarSSL/%d.%d.%d", version>>24, + (version>>16)&0xff, (version>>8)&0xff); +} + +static CURLcode +polarssl_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 = polarssl_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: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 = polarssl_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 = polarssl_connect_step3(conn, sockindex); + if(retcode) + return retcode; + } + + 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 retcode; + bool done = FALSE; + + retcode = polarssl_connect_common(conn, sockindex, FALSE, &done); + if(retcode) + return retcode; + + DEBUGASSERT(done); + + return CURLE_OK; +} + +#endif |