/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 2012 - 2017, Daniel Stenberg, , et al. * Copyright (C) 2010 - 2011, Hoi-Ho Chan, * * 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 #include #include #include #include #include #if POLARSSL_VERSION_NUMBER < 0x01030000 #error too old PolarSSL #endif #include #include #include #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 "strcase.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) struct ssl_backend_data { ctr_drbg_context ctr_drbg; entropy_context entropy; ssl_context ssl; int server_fd; x509_crt cacert; x509_crt clicert; x509_crl crl; rsa_context rsa; }; #define BACKEND connssl->backend /* apply threading? */ #if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32) #define THREADING_SUPPORT #endif #ifndef POLARSSL_ERROR_C #define error_strerror(x,y,z) #endif /* POLARSSL_ERROR_C */ #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 Curl_easy *data = NULL; if(!context) return; data = (struct Curl_easy *)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_version_from_curl(int *polarver, long ssl_version) { switch(ssl_version) { case CURL_SSLVERSION_TLSv1_0: *polarver = SSL_MINOR_VERSION_1; return CURLE_OK; case CURL_SSLVERSION_TLSv1_1: *polarver = SSL_MINOR_VERSION_2; return CURLE_OK; case CURL_SSLVERSION_TLSv1_2: *polarver = SSL_MINOR_VERSION_3; return CURLE_OK; case CURL_SSLVERSION_TLSv1_3: break; } return CURLE_SSL_CONNECT_ERROR; } static CURLcode set_ssl_version_min_max(struct connectdata *conn, int sockindex) { struct Curl_easy *data = conn->data; struct ssl_connect_data* connssl = &conn->ssl[sockindex]; long ssl_version = SSL_CONN_CONFIG(version); long ssl_version_max = SSL_CONN_CONFIG(version_max); int ssl_min_ver = SSL_MINOR_VERSION_1; int ssl_max_ver = SSL_MINOR_VERSION_1; CURLcode result = CURLE_OK; switch(ssl_version) { case CURL_SSLVERSION_DEFAULT: case CURL_SSLVERSION_TLSv1: ssl_version = CURL_SSLVERSION_TLSv1_0; ssl_version_max = CURL_SSLVERSION_MAX_TLSv1_2; break; } switch(ssl_version_max) { case CURL_SSLVERSION_MAX_NONE: ssl_version_max = ssl_version << 16; break; case CURL_SSLVERSION_MAX_DEFAULT: ssl_version_max = CURL_SSLVERSION_MAX_TLSv1_2; break; } result = polarssl_version_from_curl(&ssl_min_ver, ssl_version); if(result) { failf(data, "unsupported min version passed via CURLOPT_SSLVERSION"); return result; } result = polarssl_version_from_curl(&ssl_max_ver, ssl_version_max >> 16); if(result) { failf(data, "unsupported max version passed via CURLOPT_SSLVERSION"); return result; } ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, ssl_min_ver); ssl_set_max_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, ssl_max_ver); return result; } static CURLcode polarssl_connect_step1(struct connectdata *conn, int sockindex) { struct Curl_easy *data = conn->data; struct ssl_connect_data* connssl = &conn->ssl[sockindex]; const char *capath = SSL_CONN_CONFIG(CApath); const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name : conn->host.name; const long int port = SSL_IS_PROXY() ? conn->port : conn->remote_port; int ret = -1; char errorbuf[128]; errorbuf[0] = 0; /* PolarSSL only supports SSLv3 and TLSv1 */ if(SSL_CONN_CONFIG(version) == CURL_SSLVERSION_SSLv2) { failf(data, "PolarSSL does not support SSLv2"); return CURLE_SSL_CONNECT_ERROR; } #ifdef THREADING_SUPPORT entropy_init_mutex(&entropy); if((ret = ctr_drbg_init(&BACKEND->ctr_drbg, entropy_func_mutex, &entropy, NULL, 0)) != 0) { error_strerror(ret, errorbuf, sizeof(errorbuf)); failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n", -ret, errorbuf); } #else entropy_init(&BACKEND->entropy); if((ret = ctr_drbg_init(&BACKEND->ctr_drbg, entropy_func, &BACKEND->entropy, NULL, 0)) != 0) { error_strerror(ret, errorbuf, sizeof(errorbuf)); failf(data, "Failed - PolarSSL: ctr_drbg_init returned (-0x%04X) %s\n", -ret, errorbuf); } #endif /* THREADING_SUPPORT */ /* Load the trusted CA */ memset(&BACKEND->cacert, 0, sizeof(x509_crt)); if(SSL_CONN_CONFIG(CAfile)) { ret = x509_crt_parse_file(&BACKEND->cacert, SSL_CONN_CONFIG(CAfile)); if(ret<0) { error_strerror(ret, errorbuf, sizeof(errorbuf)); failf(data, "Error reading ca cert file %s - PolarSSL: (-0x%04X) %s", SSL_CONN_CONFIG(CAfile), -ret, errorbuf); if(SSL_CONN_CONFIG(verifypeer)) return CURLE_SSL_CACERT_BADFILE; } } if(capath) { ret = x509_crt_parse_path(&BACKEND->cacert, capath); if(ret<0) { error_strerror(ret, errorbuf, sizeof(errorbuf)); failf(data, "Error reading ca cert path %s - PolarSSL: (-0x%04X) %s", capath, -ret, errorbuf); if(SSL_CONN_CONFIG(verifypeer)) return CURLE_SSL_CACERT_BADFILE; } } /* Load the client certificate */ memset(&BACKEND->clicert, 0, sizeof(x509_crt)); if(SSL_SET_OPTION(cert)) { ret = x509_crt_parse_file(&BACKEND->clicert, SSL_SET_OPTION(cert)); if(ret) { error_strerror(ret, errorbuf, sizeof(errorbuf)); failf(data, "Error reading client cert file %s - PolarSSL: (-0x%04X) %s", SSL_SET_OPTION(cert), -ret, errorbuf); return CURLE_SSL_CERTPROBLEM; } } /* Load the client private key */ if(SSL_SET_OPTION(key)) { pk_context pk; pk_init(&pk); ret = pk_parse_keyfile(&pk, SSL_SET_OPTION(key), SSL_SET_OPTION(key_passwd)); if(ret == 0 && !pk_can_do(&pk, POLARSSL_PK_RSA)) ret = POLARSSL_ERR_PK_TYPE_MISMATCH; if(ret == 0) rsa_copy(&BACKEND->rsa, pk_rsa(pk)); else rsa_free(&BACKEND->rsa); pk_free(&pk); if(ret) { error_strerror(ret, errorbuf, sizeof(errorbuf)); failf(data, "Error reading private key %s - PolarSSL: (-0x%04X) %s", SSL_SET_OPTION(key), -ret, errorbuf); return CURLE_SSL_CERTPROBLEM; } } /* Load the CRL */ memset(&BACKEND->crl, 0, sizeof(x509_crl)); if(SSL_SET_OPTION(CRLfile)) { ret = x509_crl_parse_file(&BACKEND->crl, SSL_SET_OPTION(CRLfile)); if(ret) { error_strerror(ret, errorbuf, sizeof(errorbuf)); failf(data, "Error reading CRL file %s - PolarSSL: (-0x%04X) %s", SSL_SET_OPTION(CRLfile), -ret, errorbuf); return CURLE_SSL_CRL_BADFILE; } } infof(data, "PolarSSL: Connecting to %s:%d\n", hostname, port); if(ssl_init(&BACKEND->ssl)) { failf(data, "PolarSSL: ssl_init failed"); return CURLE_SSL_CONNECT_ERROR; } switch(SSL_CONN_CONFIG(version)) { case CURL_SSLVERSION_DEFAULT: case CURL_SSLVERSION_TLSv1: ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, SSL_MINOR_VERSION_1); break; case CURL_SSLVERSION_SSLv3: ssl_set_min_version(&BACKEND->ssl, SSL_MAJOR_VERSION_3, SSL_MINOR_VERSION_0); ssl_set_max_version(&BACKEND->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: case CURL_SSLVERSION_TLSv1_1: case CURL_SSLVERSION_TLSv1_2: case CURL_SSLVERSION_TLSv1_3: { CURLcode result = set_ssl_version_min_max(conn, sockindex); if(result != CURLE_OK) return result; break; } default: failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION"); return CURLE_SSL_CONNECT_ERROR; } ssl_set_endpoint(&BACKEND->ssl, SSL_IS_CLIENT); ssl_set_authmode(&BACKEND->ssl, SSL_VERIFY_OPTIONAL); ssl_set_rng(&BACKEND->ssl, ctr_drbg_random, &BACKEND->ctr_drbg); ssl_set_bio(&BACKEND->ssl, net_recv, &conn->sock[sockindex], net_send, &conn->sock[sockindex]); ssl_set_ciphersuites(&BACKEND->ssl, ssl_list_ciphersuites()); /* Check if there's a cached ID we can/should use here! */ if(SSL_SET_OPTION(primary.sessionid)) { void *old_session = NULL; Curl_ssl_sessionid_lock(conn); if(!Curl_ssl_getsessionid(conn, &old_session, NULL, sockindex)) { ret = ssl_set_session(&BACKEND->ssl, old_session); if(ret) { Curl_ssl_sessionid_unlock(conn); failf(data, "ssl_set_session returned -0x%x", -ret); return CURLE_SSL_CONNECT_ERROR; } infof(data, "PolarSSL re-using session\n"); } Curl_ssl_sessionid_unlock(conn); } ssl_set_ca_chain(&BACKEND->ssl, &BACKEND->cacert, &BACKEND->crl, hostname); ssl_set_own_cert_rsa(&BACKEND->ssl, &BACKEND->clicert, &BACKEND->rsa); if(ssl_set_hostname(&BACKEND->ssl, hostname)) { /* 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(&BACKEND->ssl, protocols); } #endif #ifdef POLARSSL_DEBUG ssl_set_dbg(&BACKEND->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 Curl_easy *data = conn->data; struct ssl_connect_data* connssl = &conn->ssl[sockindex]; char buffer[1024]; const char * const pinnedpubkey = SSL_IS_PROXY() ? data->set.str[STRING_SSL_PINNEDPUBLICKEY_PROXY] : data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG]; char errorbuf[128]; errorbuf[0] = 0; conn->recv[sockindex] = polarssl_recv; conn->send[sockindex] = polarssl_send; ret = ssl_handshake(&BACKEND->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: error_strerror(ret, errorbuf, sizeof(errorbuf)); 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(&BACKEND->ssl) ); ret = ssl_get_verify_result(&BACKEND->ssl); if(ret && SSL_CONN_CONFIG(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(&(BACKEND->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(&(BACKEND->ssl))) != -1) infof(data, "Dumping cert info:\n%s\n", buffer); } /* adapted from mbedtls.c */ if(pinnedpubkey) { int size; CURLcode result; x509_crt *p; unsigned char pubkey[PUB_DER_MAX_BYTES]; const x509_crt *peercert; peercert = ssl_get_peer_cert(&BACKEND->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, pinnedpubkey, &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(&BACKEND->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 Curl_easy *data = conn->data; DEBUGASSERT(ssl_connect_3 == connssl->connecting_state); if(SSL_SET_OPTION(primary.sessionid)) { int ret; ssl_session *our_ssl_sessionid; void *old_ssl_sessionid = NULL; our_ssl_sessionid = malloc(sizeof(ssl_session)); if(!our_ssl_sessionid) return CURLE_OUT_OF_MEMORY; memset(our_ssl_sessionid, 0, sizeof(ssl_session)); ret = ssl_get_session(&BACKEND->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, sockindex)) Curl_ssl_delsessionid(conn, old_ssl_sessionid); retcode = Curl_ssl_addsessionid(conn, our_ssl_sessionid, 0, sockindex); 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) { struct ssl_connect_data *connssl = &conn->ssl[sockindex]; int ret = -1; ret = ssl_write(&BACKEND->ssl, (unsigned char *)mem, len); if(ret < 0) { *curlcode = (ret == POLARSSL_ERR_NET_WANT_WRITE) ? CURLE_AGAIN : CURLE_SEND_ERROR; ret = -1; } return ret; } static void Curl_polarssl_close(struct connectdata *conn, int sockindex) { struct ssl_connect_data *connssl = &conn->ssl[sockindex]; rsa_free(&BACKEND->rsa); x509_crt_free(&BACKEND->clicert); x509_crt_free(&BACKEND->cacert); x509_crl_free(&BACKEND->crl); ssl_free(&BACKEND->ssl); } static ssize_t polarssl_recv(struct connectdata *conn, int num, char *buf, size_t buffersize, CURLcode *curlcode) { struct ssl_connect_data *connssl = &conn->ssl[num]; int ret = -1; ssize_t len = -1; memset(buf, 0, buffersize); ret = ssl_read(&BACKEND->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; } static 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.. */ static 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 Curl_easy *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_check(readfd, CURL_SOCKET_BAD, 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; } static CURLcode Curl_polarssl_connect_nonblocking(struct connectdata *conn, int sockindex, bool *done) { return polarssl_connect_common(conn, sockindex, TRUE, done); } static 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 */ static int Curl_polarssl_init(void) { return Curl_polarsslthreadlock_thread_setup(); } static void Curl_polarssl_cleanup(void) { (void)Curl_polarsslthreadlock_thread_cleanup(); } static bool Curl_polarssl_data_pending(const struct connectdata *conn, int sockindex) { const struct ssl_connect_data *connssl = &conn->ssl[sockindex]; return ssl_get_bytes_avail(&BACKEND->ssl) != 0; } static void Curl_polarssl_sha256sum(const unsigned char *input, size_t inputlen, unsigned char *sha256sum, size_t sha256len UNUSED_PARAM) { (void)sha256len; sha256(input, inputlen, sha256sum, 0); } static void *Curl_polarssl_get_internals(struct ssl_connect_data *connssl, CURLINFO info UNUSED_PARAM) { (void)info; return &BACKEND->ssl; } const struct Curl_ssl Curl_ssl_polarssl = { { CURLSSLBACKEND_POLARSSL, "polarssl" }, /* info */ 1, /* have_ca_path */ 0, /* have_certinfo */ 1, /* have_pinnedpubkey */ 0, /* have_ssl_ctx */ 0, /* support_https_proxy */ sizeof(struct ssl_backend_data), Curl_polarssl_init, /* init */ Curl_polarssl_cleanup, /* cleanup */ Curl_polarssl_version, /* version */ Curl_none_check_cxn, /* check_cxn */ Curl_none_shutdown, /* shutdown */ Curl_polarssl_data_pending, /* data_pending */ /* This might cause libcurl to use a weeker random! * TODO: use Polarssl's CTR-DRBG or HMAC-DRBG */ Curl_none_random, /* random */ Curl_none_cert_status_request, /* cert_status_request */ Curl_polarssl_connect, /* connect */ Curl_polarssl_connect_nonblocking, /* connect_nonblocking */ Curl_polarssl_get_internals, /* get_internals */ Curl_polarssl_close, /* close_one */ Curl_none_close_all, /* close_all */ Curl_polarssl_session_free, /* session_free */ Curl_none_set_engine, /* set_engine */ Curl_none_set_engine_default, /* set_engine_default */ Curl_none_engines_list, /* engines_list */ Curl_none_false_start, /* false_start */ Curl_none_md5sum, /* md5sum */ Curl_polarssl_sha256sum /* sha256sum */ }; #endif /* USE_POLARSSL */