| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 2010 - 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com> |
| * Copyright (C) 2012 - 2016, 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 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 mbedTLS-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 <mbedtls/net.h> |
| #include <mbedtls/ssl.h> |
| #include <mbedtls/certs.h> |
| #include <mbedtls/x509.h> |
| #include <mbedtls/version.h> |
| |
| #include <mbedtls/error.h> |
| #include <mbedtls/entropy.h> |
| #include <mbedtls/ctr_drbg.h> |
| #include <mbedtls/sha256.h> |
| |
| #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" |
| |
| /* The last 3 #include files should be in this order */ |
| #include "curl_printf.h" |
| #include "curl_memory.h" |
| #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 *f_name, |
| int line_nb, 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; |
| 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, NULL, 0); |
| 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, NULL, 0); |
| 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, NULL)) { |
| ret = mbedtls_ssl_set_session(&connssl->ssl, old_session); |
| if(ret) { |
| failf(data, "mbedtls_ssl_set_session returned -0x%x", -ret); |
| return CURLE_SSL_CONNECT_ERROR; |
| } |
| infof(data, "mbedTLS re-using session\n"); |
| } |
| |
| 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(mbedtls_ssl_set_hostname(&connssl->ssl, conn->host.name)) { |
| /* mbedtls_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 mbedTLS"); |
| return CURLE_SSL_CONNECT_ERROR; |
| } |
| |
| #ifdef HAS_ALPN |
| if(conn->bits.tls_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->config, 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(conn->bits.tls_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; |
| int ret; |
| |
| DEBUGASSERT(ssl_connect_3 == connssl->connecting_state); |
| |
| our_ssl_sessionid = malloc(sizeof(mbedtls_ssl_session)); |
| if(!our_ssl_sessionid) |
| return CURLE_OUT_OF_MEMORY; |
| |
| mbedtls_ssl_session_init(our_ssl_sessionid); |
| |
| ret = mbedtls_ssl_get_session(&connssl->ssl, our_ssl_sessionid); |
| if(ret) { |
| failf(data, "mbedtls_ssl_get_session returned -0x%x", -ret); |
| return CURLE_SSL_CONNECT_ERROR; |
| } |
| |
| /* If there's already a matching session in the cache, delete it */ |
| 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); |
| 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 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) |
| { |
| mbedtls_ssl_session_free(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 Curl_mbedtls_init(void) |
| { |
| return Curl_polarsslthreadlock_thread_setup(); |
| } |
| |
| void Curl_mbedtls_cleanup(void) |
| { |
| (void)Curl_polarsslthreadlock_thread_cleanup(); |
| } |
| |
| int Curl_mbedtls_data_pending(const struct connectdata *conn, int sockindex) |
| { |
| mbedtls_ssl_context *ssl = |
| (mbedtls_ssl_context *)&conn->ssl[sockindex].ssl; |
| return ssl->in_msglen != 0; |
| } |
| |
| #endif /* USE_MBEDTLS */ |
