/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 2010 - 2011, Hoi-Ho Chan, * Copyright (C) 2012 - 2016, Daniel Stenberg, , 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 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 mbedTSL-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_MBEDTLS #include #include #include #include #include #include #include #include #include #include "urldata.h" #include "sendf.h" #include "inet_pton.h" #include "mbedtls.h" #include "vtls.h" #include "parsedate.h" #include "connect.h" /* for the connect timeout */ #include "select.h" #include "rawstr.h" #include "polarssl_threadlock.h" #define _MPRINTF_REPLACE /* use our functions only */ #include #include "curl_memory.h" /* The last #include file should be: */ #include "memdebug.h" /* apply threading? */ #if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32) #define THREADING_SUPPORT #endif #if defined(THREADING_SUPPORT) static mbedtls_entropy_context entropy; static int entropy_init_initialized = 0; /* start of entropy_init_mutex() */ static void entropy_init_mutex(mbedtls_entropy_context *ctx) { /* lock 0 = entropy_init_mutex() */ Curl_polarsslthreadlock_lock_function(0); if(entropy_init_initialized == 0) { mbedtls_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 = mbedtls_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 mbedTLS */ #undef MBEDTLS_DEBUG #ifdef MBEDTLS_DEBUG static void mbed_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 USE_NGHTTP2 # undef HAS_ALPN # ifdef MBEDTLS_SSL_ALPN # define HAS_ALPN # endif #endif /* * profile */ const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_fr = { /* Hashes from SHA-1 and above */ MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA1) | MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_RIPEMD160) | MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA224) | MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA256) | MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA384) | MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA512), 0xFFFFFFF, /* Any PK alg */ 0xFFFFFFF, /* Any curve */ 1024, /* RSA min key len */ }; /* 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 * MBEDTLS_MPI_MAX_SIZE) #define ECP_PUB_DER_MAX_BYTES (30 + 2 * MBEDTLS_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) static Curl_recv mbed_recv; static Curl_send mbed_send; static CURLcode mbed_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; char errorbuf[128]; errorbuf[0]=0; /* mbedTLS only supports SSLv3 and TLSv1 */ if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) { failf(data, "mbedTLS 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); mbedtls_ctr_drbg_init(&connssl->ctr_drbg); ret = mbedtls_ctr_drbg_seed(&connssl->ctr_drbg, entropy_func_mutex, &entropy, connssl->ssn.id, connssl->ssn.id_len); if(ret) { #ifdef MBEDTLS_ERROR_C mbedtls_strerror(ret, errorbuf, sizeof(errorbuf)); #endif /* MBEDTLS_ERROR_C */ failf(data, "Failed - mbedTLS: ctr_drbg_init returned (-0x%04X) %s\n", -ret, errorbuf); } #else mbedtls_entropy_init(&connssl->entropy); mbedtls_ctr_drbg_init(&connssl->ctr_drbg); ret = mbedtls_ctr_drbg_seed(&connssl->ctr_drbg, mbedtls_entropy_func, &connssl->entropy, connssl->ssn.id, connssl->ssn.id_len); if(ret) { #ifdef MBEDTLS_ERROR_C mbedtls_strerror(ret, errorbuf, sizeof(errorbuf)); #endif /* MBEDTLS_ERROR_C */ failf(data, "Failed - mbedTLS: ctr_drbg_init returned (-0x%04X) %s\n", -ret, errorbuf); } #endif /* THREADING_SUPPORT */ /* Load the trusted CA */ mbedtls_x509_crt_init(&connssl->cacert); if(data->set.str[STRING_SSL_CAFILE]) { ret = mbedtls_x509_crt_parse_file(&connssl->cacert, data->set.str[STRING_SSL_CAFILE]); if(ret<0) { #ifdef MBEDTLS_ERROR_C mbedtls_strerror(ret, errorbuf, sizeof(errorbuf)); #endif /* MBEDTLS_ERROR_C */ failf(data, "Error reading ca cert file %s - mbedTLS: (-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 = mbedtls_x509_crt_parse_path(&connssl->cacert, data->set.str[STRING_SSL_CAPATH]); if(ret<0) { #ifdef MBEDTLS_ERROR_C mbedtls_strerror(ret, errorbuf, sizeof(errorbuf)); #endif /* MBEDTLS_ERROR_C */ failf(data, "Error reading ca cert path %s - mbedTLS: (-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 */ mbedtls_x509_crt_init(&connssl->clicert); if(data->set.str[STRING_CERT]) { ret = mbedtls_x509_crt_parse_file(&connssl->clicert, data->set.str[STRING_CERT]); if(ret) { #ifdef MBEDTLS_ERROR_C mbedtls_strerror(ret, errorbuf, sizeof(errorbuf)); #endif /* MBEDTLS_ERROR_C */ failf(data, "Error reading client cert file %s - mbedTLS: (-0x%04X) %s", data->set.str[STRING_CERT], -ret, errorbuf); return CURLE_SSL_CERTPROBLEM; } } /* Load the client private key */ mbedtls_pk_init(&connssl->pk); if(data->set.str[STRING_KEY]) { ret = mbedtls_pk_parse_keyfile(&connssl->pk, data->set.str[STRING_KEY], data->set.str[STRING_KEY_PASSWD]); if(ret == 0 && !mbedtls_pk_can_do(&connssl->pk, MBEDTLS_PK_RSA)) ret = MBEDTLS_ERR_PK_TYPE_MISMATCH; if(ret) { #ifdef MBEDTLS_ERROR_C mbedtls_strerror(ret, errorbuf, sizeof(errorbuf)); #endif /* MBEDTLS_ERROR_C */ failf(data, "Error reading private key %s - mbedTLS: (-0x%04X) %s", data->set.str[STRING_KEY], -ret, errorbuf); return CURLE_SSL_CERTPROBLEM; } } /* Load the CRL */ mbedtls_x509_crl_init(&connssl->crl); if(data->set.str[STRING_SSL_CRLFILE]) { ret = mbedtls_x509_crl_parse_file(&connssl->crl, data->set.str[STRING_SSL_CRLFILE]); if(ret) { #ifdef MBEDTLS_ERROR_C mbedtls_strerror(ret, errorbuf, sizeof(errorbuf)); #endif /* MBEDTLS_ERROR_C */ failf(data, "Error reading CRL file %s - mbedTLS: (-0x%04X) %s", data->set.str[STRING_SSL_CRLFILE], -ret, errorbuf); return CURLE_SSL_CRL_BADFILE; } } infof(data, "mbedTLS: Connecting to %s:%d\n", conn->host.name, conn->remote_port); mbedtls_ssl_config_init(&connssl->config); mbedtls_ssl_init(&connssl->ssl); if(mbedtls_ssl_setup(&connssl->ssl, &connssl->config)) { failf(data, "mbedTLS: ssl_init failed"); return CURLE_SSL_CONNECT_ERROR; } ret = mbedtls_ssl_config_defaults(&connssl->config, MBEDTLS_SSL_IS_CLIENT, MBEDTLS_SSL_TRANSPORT_STREAM, MBEDTLS_SSL_PRESET_DEFAULT); if(ret) { failf(data, "mbedTLS: ssl_config failed"); return CURLE_SSL_CONNECT_ERROR; } /* new profile with RSA min key len = 1024 ... */ mbedtls_ssl_conf_cert_profile(&connssl->config, &mbedtls_x509_crt_profile_fr); switch(data->set.ssl.version) { case CURL_SSLVERSION_DEFAULT: case CURL_SSLVERSION_TLSv1: mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_1); infof(data, "mbedTLS: Set min SSL version to TLS 1.0\n"); break; case CURL_SSLVERSION_SSLv3: mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_0); mbedtls_ssl_conf_max_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_0); infof(data, "mbedTLS: Set SSL version to SSLv3\n"); break; case CURL_SSLVERSION_TLSv1_0: mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_1); mbedtls_ssl_conf_max_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_1); infof(data, "mbedTLS: Set SSL version to TLS 1.0\n"); break; case CURL_SSLVERSION_TLSv1_1: mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_2); mbedtls_ssl_conf_max_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_2); infof(data, "mbedTLS: Set SSL version to TLS 1.1\n"); break; case CURL_SSLVERSION_TLSv1_2: mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3); mbedtls_ssl_conf_max_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3, MBEDTLS_SSL_MINOR_VERSION_3); infof(data, "mbedTLS: Set SSL version to TLS 1.2\n"); break; default: failf(data, "mbedTLS: Unsupported SSL protocol version"); return CURLE_SSL_CONNECT_ERROR; } mbedtls_ssl_conf_authmode(&connssl->config, MBEDTLS_SSL_VERIFY_OPTIONAL); mbedtls_ssl_conf_rng(&connssl->config, mbedtls_ctr_drbg_random, &connssl->ctr_drbg); mbedtls_ssl_set_bio(&connssl->ssl, &conn->sock[sockindex], mbedtls_net_send, mbedtls_net_recv, NULL /* rev_timeout() */); mbedtls_ssl_conf_ciphersuites(&connssl->config, mbedtls_ssl_list_ciphersuites()); if(!Curl_ssl_getsessionid(conn, &old_session, &old_session_size)) { memcpy(&connssl->ssn, old_session, old_session_size); infof(data, "mbedTLS re-using session\n"); } mbedtls_ssl_set_session(&connssl->ssl, &connssl->ssn); mbedtls_ssl_conf_ca_chain(&connssl->config, &connssl->cacert, &connssl->crl); if(data->set.str[STRING_KEY]) { mbedtls_ssl_conf_own_cert(&connssl->config, &connssl->clicert, &connssl->pk); } if(!Curl_inet_pton(AF_INET, conn->host.name, &addr) && #ifdef ENABLE_IPV6 !Curl_inet_pton(AF_INET6, conn->host.name, &addr) && #endif sni && mbedtls_ssl_set_hostname(&connssl->ssl, conn->host.name)) { infof(data, "WARNING: failed to configure " "server name indication (SNI) TLS extension\n"); } #ifdef HAS_ALPN if(data->set.ssl_enable_alpn) { const char **p = &connssl->protocols[0]; #ifdef USE_NGHTTP2 if(data->set.httpversion >= CURL_HTTP_VERSION_2) *p++ = NGHTTP2_PROTO_VERSION_ID; #endif *p++ = ALPN_HTTP_1_1; *p = NULL; /* this function doesn't clone the protocols array, which is why we need to keep it around */ if(mbedtls_ssl_conf_alpn_protocols(&connssl->config, &connssl->protocols[0])) { failf(data, "Failed setting ALPN protocols"); return CURLE_SSL_CONNECT_ERROR; } for(p = &connssl->protocols[0]; *p; ++p) infof(data, "ALPN, offering %s\n", *p); } #endif #ifdef MBEDTLS_DEBUG mbedtls_ssl_conf_dbg(&connssl->ssl, mbedtls_debug, data); #endif connssl->connecting_state = ssl_connect_2; return CURLE_OK; } static CURLcode mbed_connect_step2(struct connectdata *conn, int sockindex) { int ret; struct SessionHandle *data = conn->data; struct ssl_connect_data* connssl = &conn->ssl[sockindex]; const mbedtls_x509_crt *peercert; #ifdef HAS_ALPN const char* next_protocol; #endif char errorbuf[128]; errorbuf[0] = 0; conn->recv[sockindex] = mbed_recv; conn->send[sockindex] = mbed_send; ret = mbedtls_ssl_handshake(&connssl->ssl); if(ret == MBEDTLS_ERR_SSL_WANT_READ) { connssl->connecting_state = ssl_connect_2_reading; return CURLE_OK; } else if(ret == MBEDTLS_ERR_SSL_WANT_WRITE) { connssl->connecting_state = ssl_connect_2_writing; return CURLE_OK; } else if(ret) { #ifdef MBEDTLS_ERROR_C mbedtls_strerror(ret, errorbuf, sizeof(errorbuf)); #endif /* MBEDTLS_ERROR_C */ failf(data, "ssl_handshake returned - mbedTLS: (-0x%04X) %s", -ret, errorbuf); return CURLE_SSL_CONNECT_ERROR; } infof(data, "mbedTLS: Handshake complete, cipher is %s\n", mbedtls_ssl_get_ciphersuite(&conn->ssl[sockindex].ssl) ); ret = mbedtls_ssl_get_verify_result(&conn->ssl[sockindex].ssl); if(ret && data->set.ssl.verifypeer) { if(ret & MBEDTLS_X509_BADCERT_EXPIRED) failf(data, "Cert verify failed: BADCERT_EXPIRED"); if(ret & MBEDTLS_X509_BADCERT_REVOKED) { failf(data, "Cert verify failed: BADCERT_REVOKED"); return CURLE_SSL_CACERT; } if(ret & MBEDTLS_X509_BADCERT_CN_MISMATCH) failf(data, "Cert verify failed: BADCERT_CN_MISMATCH"); if(ret & MBEDTLS_X509_BADCERT_NOT_TRUSTED) failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED"); return CURLE_PEER_FAILED_VERIFICATION; } peercert = mbedtls_ssl_get_peer_cert(&connssl->ssl); if(peercert && data->set.verbose) { const size_t bufsize = 16384; char *buffer = malloc(bufsize); if(!buffer) return CURLE_OUT_OF_MEMORY; if(mbedtls_x509_crt_info(buffer, bufsize, "* ", peercert) > 0) infof(data, "Dumping cert info:\n%s\n", buffer); else infof(data, "Unable to dump certificate information.\n"); free(buffer); } if(data->set.str[STRING_SSL_PINNEDPUBLICKEY]) { int size; CURLcode result; mbedtls_x509_crt *p; unsigned char pubkey[PUB_DER_MAX_BYTES]; 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; mbedtls_x509_crt_init(p); /* Make a copy of our const peercert because mbedtls_pk_write_pubkey_der needs a non-const key, for now. https://github.com/ARMmbed/mbedtls/issues/396 */ if(mbedtls_x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) { failf(data, "Failed copying peer certificate"); mbedtls_x509_crt_free(p); free(p); return CURLE_SSL_PINNEDPUBKEYNOTMATCH; } size = mbedtls_pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES); if(size <= 0) { failf(data, "Failed copying public key from peer certificate"); mbedtls_x509_crt_free(p); free(p); return CURLE_SSL_PINNEDPUBKEYNOTMATCH; } /* mbedtls_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) { mbedtls_x509_crt_free(p); free(p); return result; } mbedtls_x509_crt_free(p); free(p); } #ifdef HAS_ALPN if(data->set.ssl_enable_alpn) { next_protocol = mbedtls_ssl_get_alpn_protocol(&connssl->ssl); if(next_protocol) { 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) && !next_protocol[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) && !next_protocol[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 mbed_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; mbedtls_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(mbedtls_ssl_session)); if(new_session) { memcpy(new_session, our_ssl_sessionid, sizeof(mbedtls_ssl_session)); retcode = Curl_ssl_addsessionid(conn, new_session, sizeof(mbedtls_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 mbed_send(struct connectdata *conn, int sockindex, const void *mem, size_t len, CURLcode *curlcode) { int ret = -1; ret = mbedtls_ssl_write(&conn->ssl[sockindex].ssl, (unsigned char *)mem, len); if(ret < 0) { *curlcode = (ret == MBEDTLS_ERR_SSL_WANT_WRITE) ? CURLE_AGAIN : CURLE_SEND_ERROR; ret = -1; } return ret; } void Curl_mbedtls_close_all(struct SessionHandle *data) { (void)data; } void Curl_mbedtls_close(struct connectdata *conn, int sockindex) { mbedtls_pk_free(&conn->ssl[sockindex].pk); mbedtls_x509_crt_free(&conn->ssl[sockindex].clicert); mbedtls_x509_crt_free(&conn->ssl[sockindex].cacert); mbedtls_x509_crl_free(&conn->ssl[sockindex].crl); mbedtls_ssl_config_free(&conn->ssl[sockindex].config); mbedtls_ssl_free(&conn->ssl[sockindex].ssl); mbedtls_ctr_drbg_free(&conn->ssl[sockindex].ctr_drbg); #ifndef THREADING_SUPPORT mbedtls_entropy_free(&conn->ssl[sockindex].entropy); #endif /* THREADING_SUPPORT */ } static ssize_t mbed_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 = mbedtls_ssl_read(&conn->ssl[num].ssl, (unsigned char *)buf, buffersize); if(ret <= 0) { if(ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY) return 0; *curlcode = (ret == MBEDTLS_ERR_SSL_WANT_READ) ? CURLE_AGAIN : CURLE_RECV_ERROR; return -1; } len = ret; return len; } void Curl_mbedtls_session_free(void *ptr) { free(ptr); } size_t Curl_mbedtls_version(char *buffer, size_t size) { unsigned int version = mbedtls_version_get_number(); return snprintf(buffer, size, "mbedTLS/%d.%d.%d", version>>24, (version>>16)&0xff, (version>>8)&0xff); } static CURLcode mbed_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 = mbed_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 = mbed_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 = mbed_connect_step3(conn, sockindex); if(retcode) return retcode; } if(ssl_connect_done==connssl->connecting_state) { connssl->state = ssl_connection_complete; conn->recv[sockindex] = mbed_recv; conn->send[sockindex] = mbed_send; *done = TRUE; } else *done = FALSE; /* Reset our connect state machine */ connssl->connecting_state = ssl_connect_1; return CURLE_OK; } CURLcode Curl_mbedtls_connect_nonblocking(struct connectdata *conn, int sockindex, bool *done) { return mbed_connect_common(conn, sockindex, TRUE, done); } CURLcode Curl_mbedtls_connect(struct connectdata *conn, int sockindex) { CURLcode retcode; bool done = FALSE; retcode = mbed_connect_common(conn, sockindex, FALSE, &done); if(retcode) return retcode; DEBUGASSERT(done); return CURLE_OK; } /* * return 0 error initializing SSL * return 1 SSL initialized successfully */ int mbedtls_init(void) { return Curl_polarsslthreadlock_thread_setup(); } void mbedtls_cleanup(void) { (void)Curl_polarsslthreadlock_thread_cleanup(); } #endif /* USE_MBEDTLS */