[164] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 2010 - 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
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| 9 | * Copyright (C) 2012 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 10 | *
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| 11 | * This software is licensed as described in the file COPYING, which
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| 12 | * you should have received as part of this distribution. The terms
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| 13 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 14 | *
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| 15 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 16 | * copies of the Software, and permit persons to whom the Software is
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| 17 | * furnished to do so, under the terms of the COPYING file.
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| 18 | *
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| 19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 20 | * KIND, either express or implied.
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| 21 | *
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| 22 | ***************************************************************************/
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| 23 |
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| 24 | /*
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| 25 | * Source file for all mbedTSL-specific code for the TLS/SSL layer. No code
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| 26 | * but vtls.c should ever call or use these functions.
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| 27 | *
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| 28 | */
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| 29 |
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| 30 | #include "curl_setup.h"
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| 31 |
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| 32 | #ifdef USE_MBEDTLS
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| 33 |
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| 34 | #include <mbedtls/net.h>
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| 35 | #include <mbedtls/ssl.h>
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| 36 | #include <mbedtls/certs.h>
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| 37 | #include <mbedtls/x509.h>
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| 38 | #include <mbedtls/version.h>
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| 39 |
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| 40 | #include <mbedtls/error.h>
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| 41 | #include <mbedtls/entropy.h>
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| 42 | #include <mbedtls/ctr_drbg.h>
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| 43 |
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| 44 | #include "urldata.h"
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| 45 | #include "sendf.h"
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| 46 | #include "inet_pton.h"
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| 47 | #include "mbedtls.h"
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| 48 | #include "vtls.h"
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| 49 | #include "parsedate.h"
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| 50 | #include "connect.h" /* for the connect timeout */
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| 51 | #include "select.h"
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| 52 | #include "rawstr.h"
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| 53 | #include "polarssl_threadlock.h"
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| 54 |
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| 55 | #define _MPRINTF_REPLACE /* use our functions only */
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| 56 | #include <curl/mprintf.h>
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| 57 | #include "curl_memory.h"
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| 58 | /* The last #include file should be: */
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| 59 | #include "memdebug.h"
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| 60 |
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| 61 | /* apply threading? */
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| 62 | #if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32)
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| 63 | #define THREADING_SUPPORT
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| 64 | #endif
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| 65 |
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| 66 | #if defined(THREADING_SUPPORT)
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| 67 | static mbedtls_entropy_context entropy;
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| 68 |
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| 69 | static int entropy_init_initialized = 0;
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| 70 |
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| 71 | /* start of entropy_init_mutex() */
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| 72 | static void entropy_init_mutex(mbedtls_entropy_context *ctx)
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| 73 | {
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| 74 | /* lock 0 = entropy_init_mutex() */
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| 75 | Curl_polarsslthreadlock_lock_function(0);
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| 76 | if(entropy_init_initialized == 0) {
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| 77 | mbedtls_entropy_init(ctx);
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| 78 | entropy_init_initialized = 1;
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| 79 | }
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| 80 | Curl_polarsslthreadlock_unlock_function(0);
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| 81 | }
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| 82 | /* end of entropy_init_mutex() */
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| 83 |
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| 84 | /* start of entropy_func_mutex() */
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| 85 | static int entropy_func_mutex(void *data, unsigned char *output, size_t len)
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| 86 | {
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| 87 | int ret;
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| 88 | /* lock 1 = entropy_func_mutex() */
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| 89 | Curl_polarsslthreadlock_lock_function(1);
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| 90 | ret = mbedtls_entropy_func(data, output, len);
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| 91 | Curl_polarsslthreadlock_unlock_function(1);
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| 92 |
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| 93 | return ret;
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| 94 | }
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| 95 | /* end of entropy_func_mutex() */
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| 96 |
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| 97 | #endif /* THREADING_SUPPORT */
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| 98 |
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| 99 | /* Define this to enable lots of debugging for mbedTLS */
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| 100 | #undef MBEDTLS_DEBUG
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| 101 |
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| 102 | #ifdef MBEDTLS_DEBUG
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| 103 | static void mbedtls_debug(void *context, int level, const char *line)
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| 104 | {
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| 105 | struct SessionHandle *data = NULL;
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| 106 |
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| 107 | if(!context)
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| 108 | return;
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| 109 |
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| 110 | data = (struct SessionHandle *)context;
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| 111 |
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| 112 | infof(data, "%s", line);
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| 113 | (void) level;
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| 114 | }
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| 115 | #else
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| 116 | #endif
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| 117 |
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| 118 | /* ALPN for http2? */
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| 119 | #ifdef USE_NGHTTP2
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| 120 | # undef HAS_ALPN
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| 121 | # ifdef MBEDTLS_SSL_ALPN
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| 122 | # define HAS_ALPN
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| 123 | # endif
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| 124 | #endif
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| 125 |
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| 126 |
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| 127 | /*
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| 128 | * profile
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| 129 | */
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| 130 | const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_fr =
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| 131 | {
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| 132 | /* Hashes from SHA-1 and above */
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| 133 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 ) |
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| 134 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_RIPEMD160 ) |
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| 135 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA224 ) |
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| 136 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
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| 137 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ) |
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| 138 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA512 ),
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| 139 | 0xFFFFFFF, /* Any PK alg */
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| 140 | 0xFFFFFFF, /* Any curve */
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| 141 | 1024, /* RSA min key len */
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| 142 | };
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| 143 |
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| 144 | /* See https://tls.mbed.org/discussions/generic/
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| 145 | howto-determine-exact-buffer-len-for-mbedtls_pk_write_pubkey_der
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| 146 | */
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| 147 | #define RSA_PUB_DER_MAX_BYTES (38 + 2 * MBEDTLS_MPI_MAX_SIZE)
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| 148 | #define ECP_PUB_DER_MAX_BYTES (30 + 2 * MBEDTLS_ECP_MAX_BYTES)
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| 149 |
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| 150 | #define PUB_DER_MAX_BYTES (RSA_PUB_DER_MAX_BYTES > ECP_PUB_DER_MAX_BYTES ? \
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| 151 | RSA_PUB_DER_MAX_BYTES : ECP_PUB_DER_MAX_BYTES)
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| 152 |
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| 153 | static Curl_recv mbedtls_recv;
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| 154 | static Curl_send mbedtls_send;
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| 155 |
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| 156 | static CURLcode
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| 157 | mbedtls_connect_step1(struct connectdata *conn,
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| 158 | int sockindex)
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| 159 | {
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| 160 | struct SessionHandle *data = conn->data;
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| 161 | struct ssl_connect_data* connssl = &conn->ssl[sockindex];
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| 162 |
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| 163 | bool sni = TRUE; /* default is SNI enabled */
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| 164 | int ret = -1;
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| 165 | #ifdef ENABLE_IPV6
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| 166 | struct in6_addr addr;
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| 167 | #else
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| 168 | struct in_addr addr;
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| 169 | #endif
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| 170 | void *old_session = NULL;
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| 171 | size_t old_session_size = 0;
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| 172 | char errorbuf[128];
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| 173 | errorbuf[0]=0;
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| 174 |
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| 175 | /* mbedTLS only supports SSLv3 and TLSv1 */
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| 176 | if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) {
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| 177 | failf(data, "mbedTLS does not support SSLv2");
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| 178 | return CURLE_SSL_CONNECT_ERROR;
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| 179 | }
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| 180 | else if(data->set.ssl.version == CURL_SSLVERSION_SSLv3)
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| 181 | sni = FALSE; /* SSLv3 has no SNI */
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| 182 |
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| 183 | #ifdef THREADING_SUPPORT
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| 184 | entropy_init_mutex(&entropy);
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| 185 | mbedtls_ctr_drbg_init(&connssl->ctr_drbg);
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| 186 |
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| 187 | ret = mbedtls_ctr_drbg_seed(&connssl->ctr_drbg, entropy_func_mutex,
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| 188 | &entropy, connssl->ssn.id,
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| 189 | connssl->ssn.id_len);
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| 190 | if(ret) {
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| 191 | #ifdef MBEDTLS_ERROR_C
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| 192 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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| 193 | #endif /* MBEDTLS_ERROR_C */
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| 194 | failf(data, "Failed - mbedTLS: ctr_drbg_init returned (-0x%04X) %s\n",
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| 195 | -ret, errorbuf);
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| 196 | }
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| 197 | #else
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| 198 | mbedtls_entropy_init(&connssl->entropy);
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| 199 | mbedtls_ctr_drbg_init(&connssl->ctr_drbg);
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| 200 |
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| 201 | ret = mbedtls_ctr_drbg_seed(&connssl->ctr_drbg, mbedtls_entropy_func,
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| 202 | &connssl->entropy, connssl->ssn.id,
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| 203 | connssl->ssn.id_len);
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| 204 | if(ret) {
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| 205 | #ifdef MBEDTLS_ERROR_C
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| 206 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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| 207 | #endif /* MBEDTLS_ERROR_C */
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| 208 | failf(data, "Failed - mbedTLS: ctr_drbg_init returned (-0x%04X) %s\n",
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| 209 | -ret, errorbuf);
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| 210 | }
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| 211 | #endif /* THREADING_SUPPORT */
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| 212 |
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| 213 | /* Load the trusted CA */
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| 214 | memset(&connssl->cacert, 0, sizeof(mbedtls_x509_crt));
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| 215 |
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| 216 | if(data->set.str[STRING_SSL_CAFILE]) {
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| 217 | ret = mbedtls_x509_crt_parse_file(&connssl->cacert,
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| 218 | data->set.str[STRING_SSL_CAFILE]);
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| 219 |
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| 220 | if(ret<0) {
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| 221 | #ifdef MBEDTLS_ERROR_C
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| 222 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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| 223 | #endif /* MBEDTLS_ERROR_C */
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| 224 | failf(data, "Error reading ca cert file %s - mbedTLS: (-0x%04X) %s",
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| 225 | data->set.str[STRING_SSL_CAFILE], -ret, errorbuf);
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| 226 |
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| 227 | if(data->set.ssl.verifypeer)
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| 228 | return CURLE_SSL_CACERT_BADFILE;
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| 229 | }
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| 230 | }
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| 231 |
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| 232 | if(data->set.str[STRING_SSL_CAPATH]) {
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| 233 | ret = mbedtls_x509_crt_parse_path(&connssl->cacert,
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| 234 | data->set.str[STRING_SSL_CAPATH]);
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| 235 |
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| 236 | if(ret<0) {
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| 237 | #ifdef MBEDTLS_ERROR_C
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| 238 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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| 239 | #endif /* MBEDTLS_ERROR_C */
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| 240 | failf(data, "Error reading ca cert path %s - mbedTLS: (-0x%04X) %s",
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| 241 | data->set.str[STRING_SSL_CAPATH], -ret, errorbuf);
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| 242 |
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| 243 | if(data->set.ssl.verifypeer)
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| 244 | return CURLE_SSL_CACERT_BADFILE;
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| 245 | }
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| 246 | }
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| 247 |
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| 248 | /* Load the client certificate */
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| 249 | memset(&connssl->clicert, 0, sizeof(mbedtls_x509_crt));
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| 250 |
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| 251 | if(data->set.str[STRING_CERT]) {
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| 252 | ret = mbedtls_x509_crt_parse_file(&connssl->clicert,
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| 253 | data->set.str[STRING_CERT]);
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| 254 |
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| 255 | if(ret) {
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| 256 | #ifdef MBEDTLS_ERROR_C
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| 257 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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| 258 | #endif /* MBEDTLS_ERROR_C */
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| 259 | failf(data, "Error reading client cert file %s - mbedTLS: (-0x%04X) %s",
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| 260 | data->set.str[STRING_CERT], -ret, errorbuf);
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| 261 |
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| 262 | return CURLE_SSL_CERTPROBLEM;
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| 263 | }
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| 264 | }
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| 265 |
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| 266 | /* Load the client private key */
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| 267 | if(data->set.str[STRING_KEY]) {
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| 268 | mbedtls_pk_init(&connssl->pk);
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| 269 | ret = mbedtls_pk_parse_keyfile(&connssl->pk, data->set.str[STRING_KEY],
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| 270 | data->set.str[STRING_KEY_PASSWD]);
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| 271 | if(ret == 0 && !mbedtls_pk_can_do(&connssl->pk, MBEDTLS_PK_RSA))
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| 272 | ret = MBEDTLS_ERR_PK_TYPE_MISMATCH;
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| 273 |
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| 274 | if(ret) {
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| 275 | #ifdef MBEDTLS_ERROR_C
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| 276 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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| 277 | #endif /* MBEDTLS_ERROR_C */
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| 278 | failf(data, "Error reading private key %s - mbedTLS: (-0x%04X) %s",
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| 279 | data->set.str[STRING_KEY], -ret, errorbuf);
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| 280 |
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| 281 | return CURLE_SSL_CERTPROBLEM;
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| 282 | }
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| 283 | }
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| 284 |
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| 285 | /* Load the CRL */
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| 286 | memset(&connssl->crl, 0, sizeof(mbedtls_x509_crl));
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| 287 |
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| 288 | if(data->set.str[STRING_SSL_CRLFILE]) {
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| 289 | ret = mbedtls_x509_crl_parse_file(&connssl->crl,
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| 290 | data->set.str[STRING_SSL_CRLFILE]);
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| 291 |
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| 292 | if(ret) {
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| 293 | #ifdef MBEDTLS_ERROR_C
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| 294 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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| 295 | #endif /* MBEDTLS_ERROR_C */
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| 296 | failf(data, "Error reading CRL file %s - mbedTLS: (-0x%04X) %s",
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| 297 | data->set.str[STRING_SSL_CRLFILE], -ret, errorbuf);
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| 298 |
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| 299 | return CURLE_SSL_CRL_BADFILE;
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| 300 | }
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| 301 | }
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| 302 |
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| 303 | infof(data, "mbedTLS: Connecting to %s:%d\n",
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| 304 | conn->host.name, conn->remote_port);
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| 305 |
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| 306 | mbedtls_ssl_config_init(&connssl->config);
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| 307 |
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| 308 | mbedtls_ssl_init(&connssl->ssl);
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| 309 | if(mbedtls_ssl_setup(&connssl->ssl, &connssl->config)) {
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| 310 | failf(data, "mbedTLS: ssl_init failed");
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| 311 | return CURLE_SSL_CONNECT_ERROR;
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| 312 | }
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| 313 | ret = mbedtls_ssl_config_defaults(&connssl->config,
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| 314 | MBEDTLS_SSL_IS_CLIENT,
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| 315 | MBEDTLS_SSL_TRANSPORT_STREAM,
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| 316 | MBEDTLS_SSL_PRESET_DEFAULT);
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| 317 | if(ret) {
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| 318 | failf(data, "mbedTLS: ssl_config failed");
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| 319 | return CURLE_SSL_CONNECT_ERROR;
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| 320 | }
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| 321 |
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| 322 | /* new profile with RSA min key len = 1024 ... */
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| 323 | mbedtls_ssl_conf_cert_profile( &connssl->config,
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| 324 | &mbedtls_x509_crt_profile_fr);
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| 325 |
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| 326 | switch(data->set.ssl.version) {
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| 327 | case CURL_SSLVERSION_SSLv3:
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| 328 | mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3,
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| 329 | MBEDTLS_SSL_MINOR_VERSION_0);
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| 330 | infof(data, "mbedTLS: Forced min. SSL Version to be SSLv3\n");
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| 331 | break;
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| 332 | case CURL_SSLVERSION_TLSv1_0:
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| 333 | mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3,
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| 334 | MBEDTLS_SSL_MINOR_VERSION_1);
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| 335 | infof(data, "mbedTLS: Forced min. SSL Version to be TLS 1.0\n");
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| 336 | break;
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| 337 | case CURL_SSLVERSION_TLSv1_1:
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| 338 | mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3,
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| 339 | MBEDTLS_SSL_MINOR_VERSION_2);
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| 340 | infof(data, "mbedTLS: Forced min. SSL Version to be TLS 1.1\n");
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| 341 | break;
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| 342 | case CURL_SSLVERSION_TLSv1_2:
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| 343 | mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3,
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| 344 | MBEDTLS_SSL_MINOR_VERSION_3);
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| 345 | infof(data, "mbedTLS: Forced min. SSL Version to be TLS 1.2\n");
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| 346 | break;
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| 347 | }
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| 348 |
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| 349 | mbedtls_ssl_conf_authmode(&connssl->config, MBEDTLS_SSL_VERIFY_OPTIONAL);
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| 350 |
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| 351 | mbedtls_ssl_conf_rng(&connssl->config, mbedtls_ctr_drbg_random,
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| 352 | &connssl->ctr_drbg);
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| 353 | mbedtls_ssl_set_bio(&connssl->ssl, &conn->sock[sockindex],
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| 354 | mbedtls_net_send,
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| 355 | mbedtls_net_recv,
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| 356 | NULL /* rev_timeout() */);
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| 357 |
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| 358 | mbedtls_ssl_conf_ciphersuites(&connssl->config,
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| 359 | mbedtls_ssl_list_ciphersuites());
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| 360 | if(!Curl_ssl_getsessionid(conn, &old_session, &old_session_size)) {
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| 361 | memcpy(&connssl->ssn, old_session, old_session_size);
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| 362 | infof(data, "mbedTLS re-using session\n");
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| 363 | }
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| 364 |
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| 365 | mbedtls_ssl_set_session(&connssl->ssl,
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| 366 | &connssl->ssn);
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| 367 |
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| 368 | mbedtls_ssl_conf_ca_chain(&connssl->config,
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| 369 | &connssl->cacert,
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| 370 | &connssl->crl);
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| 371 |
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| 372 | if(data->set.str[STRING_KEY]) {
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| 373 | mbedtls_ssl_conf_own_cert(&connssl->config,
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| 374 | &connssl->clicert, &connssl->pk);
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| 375 | }
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| 376 | if(!Curl_inet_pton(AF_INET, conn->host.name, &addr) &&
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| 377 | #ifdef ENABLE_IPV6
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| 378 | !Curl_inet_pton(AF_INET6, conn->host.name, &addr) &&
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| 379 | #endif
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| 380 | sni && mbedtls_ssl_set_hostname(&connssl->ssl, conn->host.name)) {
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| 381 | infof(data, "WARNING: failed to configure "
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| 382 | "server name indication (SNI) TLS extension\n");
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| 383 | }
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| 384 |
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| 385 | #ifdef HAS_ALPN
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| 386 | if(data->set.ssl_enable_alpn) {
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| 387 | const char *protocols[3];
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| 388 | const char **p = protocols;
|
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| 389 | #ifdef USE_NGHTTP2
|
---|
| 390 | if(data->set.httpversion >= CURL_HTTP_VERSION_2)
|
---|
| 391 | *p++ = NGHTTP2_PROTO_VERSION_ID;
|
---|
| 392 | #endif
|
---|
| 393 | *p++ = ALPN_HTTP_1_1;
|
---|
| 394 | *p = NULL;
|
---|
| 395 | if(mbedtls_ssl_conf_alpn_protocols(&connssl->config, protocols)) {
|
---|
| 396 | failf(data, "Failed setting ALPN protocols");
|
---|
| 397 | return CURLE_SSL_CONNECT_ERROR;
|
---|
| 398 | }
|
---|
| 399 | for(p = protocols; *p; ++p)
|
---|
| 400 | infof(data, "ALPN, offering %s\n", *p);
|
---|
| 401 | }
|
---|
| 402 | #endif
|
---|
| 403 |
|
---|
| 404 | #ifdef MBEDTLS_DEBUG
|
---|
| 405 | mbedtls_ssl_conf_dbg(&connssl->ssl, mbedtls_debug, data);
|
---|
| 406 | #endif
|
---|
| 407 |
|
---|
| 408 | connssl->connecting_state = ssl_connect_2;
|
---|
| 409 |
|
---|
| 410 | return CURLE_OK;
|
---|
| 411 | }
|
---|
| 412 |
|
---|
| 413 | static CURLcode
|
---|
| 414 | mbedtls_connect_step2(struct connectdata *conn,
|
---|
| 415 | int sockindex)
|
---|
| 416 | {
|
---|
| 417 | int ret;
|
---|
| 418 | struct SessionHandle *data = conn->data;
|
---|
| 419 | struct ssl_connect_data* connssl = &conn->ssl[sockindex];
|
---|
| 420 | const mbedtls_x509_crt *peercert;
|
---|
| 421 |
|
---|
| 422 | #ifdef HAS_ALPN
|
---|
| 423 | const char* next_protocol;
|
---|
| 424 | #endif
|
---|
| 425 |
|
---|
| 426 | char errorbuf[128];
|
---|
| 427 | errorbuf[0] = 0;
|
---|
| 428 |
|
---|
| 429 | conn->recv[sockindex] = mbedtls_recv;
|
---|
| 430 | conn->send[sockindex] = mbedtls_send;
|
---|
| 431 |
|
---|
| 432 | ret = mbedtls_ssl_handshake(&connssl->ssl);
|
---|
| 433 |
|
---|
| 434 | if(ret == MBEDTLS_ERR_SSL_WANT_READ) {
|
---|
| 435 | connssl->connecting_state = ssl_connect_2_reading;
|
---|
| 436 | return CURLE_OK;
|
---|
| 437 | }
|
---|
| 438 | else if(ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
|
---|
| 439 | connssl->connecting_state = ssl_connect_2_writing;
|
---|
| 440 | return CURLE_OK;
|
---|
| 441 | }
|
---|
| 442 | else if(ret) {
|
---|
| 443 | #ifdef MBEDTLS_ERROR_C
|
---|
| 444 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
|
---|
| 445 | #endif /* MBEDTLS_ERROR_C */
|
---|
| 446 | failf(data, "ssl_handshake returned - mbedTLS: (-0x%04X) %s",
|
---|
| 447 | -ret, errorbuf);
|
---|
| 448 | return CURLE_SSL_CONNECT_ERROR;
|
---|
| 449 | }
|
---|
| 450 |
|
---|
| 451 | infof(data, "mbedTLS: Handshake complete, cipher is %s\n",
|
---|
| 452 | mbedtls_ssl_get_ciphersuite(&conn->ssl[sockindex].ssl)
|
---|
| 453 | );
|
---|
| 454 |
|
---|
| 455 | ret = mbedtls_ssl_get_verify_result(&conn->ssl[sockindex].ssl);
|
---|
| 456 |
|
---|
| 457 | if(ret && data->set.ssl.verifypeer) {
|
---|
| 458 | if(ret & MBEDTLS_X509_BADCERT_EXPIRED)
|
---|
| 459 | failf(data, "Cert verify failed: BADCERT_EXPIRED");
|
---|
| 460 |
|
---|
| 461 | if(ret & MBEDTLS_X509_BADCERT_REVOKED) {
|
---|
| 462 | failf(data, "Cert verify failed: BADCERT_REVOKED");
|
---|
| 463 | return CURLE_SSL_CACERT;
|
---|
| 464 | }
|
---|
| 465 |
|
---|
| 466 | if(ret & MBEDTLS_X509_BADCERT_CN_MISMATCH)
|
---|
| 467 | failf(data, "Cert verify failed: BADCERT_CN_MISMATCH");
|
---|
| 468 |
|
---|
| 469 | if(ret & MBEDTLS_X509_BADCERT_NOT_TRUSTED)
|
---|
| 470 | failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED");
|
---|
| 471 |
|
---|
| 472 | return CURLE_PEER_FAILED_VERIFICATION;
|
---|
| 473 | }
|
---|
| 474 |
|
---|
| 475 | peercert = mbedtls_ssl_get_peer_cert(&connssl->ssl);
|
---|
| 476 |
|
---|
| 477 | if(peercert && data->set.verbose) {
|
---|
| 478 | const size_t bufsize = 16384;
|
---|
| 479 | char *buffer = malloc(bufsize);
|
---|
| 480 |
|
---|
| 481 | if(!buffer)
|
---|
| 482 | return CURLE_OUT_OF_MEMORY;
|
---|
| 483 |
|
---|
| 484 | if(mbedtls_x509_crt_info(buffer, bufsize, "* ", peercert) > 0)
|
---|
| 485 | infof(data, "Dumping cert info:\n%s\n", buffer);
|
---|
| 486 | else
|
---|
| 487 | infof(data, "Unable to dump certificate information.\n");
|
---|
| 488 |
|
---|
| 489 | free(buffer);
|
---|
| 490 | }
|
---|
| 491 |
|
---|
| 492 | if(data->set.str[STRING_SSL_PINNEDPUBLICKEY]) {
|
---|
| 493 | int size;
|
---|
| 494 | CURLcode result;
|
---|
| 495 | mbedtls_x509_crt *p;
|
---|
| 496 | unsigned char pubkey[PUB_DER_MAX_BYTES];
|
---|
| 497 |
|
---|
| 498 | if(!peercert || !peercert->raw.p || !peercert->raw.len) {
|
---|
| 499 | failf(data, "Failed due to missing peer certificate");
|
---|
| 500 | return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
|
---|
| 501 | }
|
---|
| 502 |
|
---|
| 503 | p = calloc(1, sizeof(*p));
|
---|
| 504 |
|
---|
| 505 | if(!p)
|
---|
| 506 | return CURLE_OUT_OF_MEMORY;
|
---|
| 507 |
|
---|
| 508 | mbedtls_x509_crt_init(p);
|
---|
| 509 |
|
---|
| 510 | /* Make a copy of our const peercert because mbedtls_pk_write_pubkey_der
|
---|
| 511 | needs a non-const key, for now.
|
---|
| 512 | https://github.com/ARMmbed/mbedtls/issues/396 */
|
---|
| 513 | if(mbedtls_x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) {
|
---|
| 514 | failf(data, "Failed copying peer certificate");
|
---|
| 515 | mbedtls_x509_crt_free(p);
|
---|
| 516 | free(p);
|
---|
| 517 | return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | size = mbedtls_pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES);
|
---|
| 521 |
|
---|
| 522 | if(size <= 0) {
|
---|
| 523 | failf(data, "Failed copying public key from peer certificate");
|
---|
| 524 | mbedtls_x509_crt_free(p);
|
---|
| 525 | free(p);
|
---|
| 526 | return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
|
---|
| 527 | }
|
---|
| 528 |
|
---|
| 529 | /* mbedtls_pk_write_pubkey_der writes data at the end of the buffer. */
|
---|
| 530 | result = Curl_pin_peer_pubkey(data,
|
---|
| 531 | data->set.str[STRING_SSL_PINNEDPUBLICKEY],
|
---|
| 532 | &pubkey[PUB_DER_MAX_BYTES - size], size);
|
---|
| 533 | if(result) {
|
---|
| 534 | mbedtls_x509_crt_free(p);
|
---|
| 535 | free(p);
|
---|
| 536 | return result;
|
---|
| 537 | }
|
---|
| 538 |
|
---|
| 539 | mbedtls_x509_crt_free(p);
|
---|
| 540 | free(p);
|
---|
| 541 | }
|
---|
| 542 |
|
---|
| 543 | #ifdef HAS_ALPN
|
---|
| 544 | if(data->set.ssl_enable_alpn) {
|
---|
| 545 | next_protocol = mbedtls_ssl_get_alpn_protocol(&connssl->ssl);
|
---|
| 546 |
|
---|
| 547 | if(next_protocol) {
|
---|
| 548 | infof(data, "ALPN, server accepted to use %s\n", next_protocol);
|
---|
| 549 | #ifdef USE_NGHTTP2
|
---|
| 550 | if(!strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID,
|
---|
| 551 | NGHTTP2_PROTO_VERSION_ID_LEN) &&
|
---|
| 552 | !next_protocol[NGHTTP2_PROTO_VERSION_ID_LEN]) {
|
---|
| 553 | conn->negnpn = CURL_HTTP_VERSION_2;
|
---|
| 554 | }
|
---|
| 555 | else
|
---|
| 556 | #endif
|
---|
| 557 | if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH) &&
|
---|
| 558 | !next_protocol[ALPN_HTTP_1_1_LENGTH]) {
|
---|
| 559 | conn->negnpn = CURL_HTTP_VERSION_1_1;
|
---|
| 560 | }
|
---|
| 561 | }
|
---|
| 562 | else {
|
---|
| 563 | infof(data, "ALPN, server did not agree to a protocol\n");
|
---|
| 564 | }
|
---|
| 565 | }
|
---|
| 566 | #endif
|
---|
| 567 |
|
---|
| 568 | connssl->connecting_state = ssl_connect_3;
|
---|
| 569 | infof(data, "SSL connected\n");
|
---|
| 570 |
|
---|
| 571 | return CURLE_OK;
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 | static CURLcode
|
---|
| 575 | mbedtls_connect_step3(struct connectdata *conn,
|
---|
| 576 | int sockindex)
|
---|
| 577 | {
|
---|
| 578 | CURLcode retcode = CURLE_OK;
|
---|
| 579 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
| 580 | struct SessionHandle *data = conn->data;
|
---|
| 581 | void *old_ssl_sessionid = NULL;
|
---|
| 582 | mbedtls_ssl_session *our_ssl_sessionid = &conn->ssl[sockindex].ssn;
|
---|
| 583 | int incache;
|
---|
| 584 |
|
---|
| 585 | DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
|
---|
| 586 |
|
---|
| 587 | /* Save the current session data for possible re-use */
|
---|
| 588 | incache = !(Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL));
|
---|
| 589 | if(incache) {
|
---|
| 590 | if(old_ssl_sessionid != our_ssl_sessionid) {
|
---|
| 591 | infof(data, "old SSL session ID is stale, removing\n");
|
---|
| 592 | Curl_ssl_delsessionid(conn, old_ssl_sessionid);
|
---|
| 593 | incache = FALSE;
|
---|
| 594 | }
|
---|
| 595 | }
|
---|
| 596 | if(!incache) {
|
---|
| 597 | void *new_session = malloc(sizeof(mbedtls_ssl_session));
|
---|
| 598 |
|
---|
| 599 | if(new_session) {
|
---|
| 600 | memcpy(new_session, our_ssl_sessionid,
|
---|
| 601 | sizeof(mbedtls_ssl_session));
|
---|
| 602 |
|
---|
| 603 | retcode = Curl_ssl_addsessionid(conn, new_session,
|
---|
| 604 | sizeof(mbedtls_ssl_session));
|
---|
| 605 | }
|
---|
| 606 | else {
|
---|
| 607 | retcode = CURLE_OUT_OF_MEMORY;
|
---|
| 608 | }
|
---|
| 609 |
|
---|
| 610 | if(retcode) {
|
---|
| 611 | failf(data, "failed to store ssl session");
|
---|
| 612 | return retcode;
|
---|
| 613 | }
|
---|
| 614 | }
|
---|
| 615 |
|
---|
| 616 | connssl->connecting_state = ssl_connect_done;
|
---|
| 617 |
|
---|
| 618 | return CURLE_OK;
|
---|
| 619 | }
|
---|
| 620 |
|
---|
| 621 | static ssize_t mbedtls_send(struct connectdata *conn,
|
---|
| 622 | int sockindex,
|
---|
| 623 | const void *mem,
|
---|
| 624 | size_t len,
|
---|
| 625 | CURLcode *curlcode)
|
---|
| 626 | {
|
---|
| 627 | int ret = -1;
|
---|
| 628 |
|
---|
| 629 | ret = mbedtls_ssl_write(&conn->ssl[sockindex].ssl,
|
---|
| 630 | (unsigned char *)mem, len);
|
---|
| 631 |
|
---|
| 632 | if(ret < 0) {
|
---|
| 633 | *curlcode = (ret == MBEDTLS_ERR_SSL_WANT_WRITE) ?
|
---|
| 634 | CURLE_AGAIN : CURLE_SEND_ERROR;
|
---|
| 635 | ret = -1;
|
---|
| 636 | }
|
---|
| 637 |
|
---|
| 638 | return ret;
|
---|
| 639 | }
|
---|
| 640 |
|
---|
| 641 | void Curl_mbedtls_close_all(struct SessionHandle *data)
|
---|
| 642 | {
|
---|
| 643 | (void)data;
|
---|
| 644 | }
|
---|
| 645 |
|
---|
| 646 | void Curl_mbedtls_close(struct connectdata *conn, int sockindex)
|
---|
| 647 | {
|
---|
| 648 | /* mbedtls_rsa_free(&conn->ssl[sockindex].rsa); */
|
---|
| 649 | mbedtls_x509_crt_free(&conn->ssl[sockindex].clicert);
|
---|
| 650 | mbedtls_x509_crt_free(&conn->ssl[sockindex].cacert);
|
---|
| 651 | mbedtls_x509_crl_free(&conn->ssl[sockindex].crl);
|
---|
| 652 | mbedtls_ssl_free(&conn->ssl[sockindex].ssl);
|
---|
| 653 | }
|
---|
| 654 |
|
---|
| 655 | static ssize_t mbedtls_recv(struct connectdata *conn,
|
---|
| 656 | int num,
|
---|
| 657 | char *buf,
|
---|
| 658 | size_t buffersize,
|
---|
| 659 | CURLcode *curlcode)
|
---|
| 660 | {
|
---|
| 661 | int ret = -1;
|
---|
| 662 | ssize_t len = -1;
|
---|
| 663 |
|
---|
| 664 | memset(buf, 0, buffersize);
|
---|
| 665 | ret = mbedtls_ssl_read(&conn->ssl[num].ssl, (unsigned char *)buf,
|
---|
| 666 | buffersize);
|
---|
| 667 |
|
---|
| 668 | if(ret <= 0) {
|
---|
| 669 | if(ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY)
|
---|
| 670 | return 0;
|
---|
| 671 |
|
---|
| 672 | *curlcode = (ret == MBEDTLS_ERR_SSL_WANT_READ) ?
|
---|
| 673 | CURLE_AGAIN : CURLE_RECV_ERROR;
|
---|
| 674 | return -1;
|
---|
| 675 | }
|
---|
| 676 |
|
---|
| 677 | len = ret;
|
---|
| 678 |
|
---|
| 679 | return len;
|
---|
| 680 | }
|
---|
| 681 |
|
---|
| 682 | void Curl_mbedtls_session_free(void *ptr)
|
---|
| 683 | {
|
---|
| 684 | free(ptr);
|
---|
| 685 | }
|
---|
| 686 |
|
---|
| 687 | size_t Curl_mbedtls_version(char *buffer, size_t size)
|
---|
| 688 | {
|
---|
| 689 | unsigned int version = mbedtls_version_get_number();
|
---|
| 690 | return snprintf(buffer, size, "mbedTLS/%d.%d.%d", version>>24,
|
---|
| 691 | (version>>16)&0xff, (version>>8)&0xff);
|
---|
| 692 | }
|
---|
| 693 |
|
---|
| 694 | static CURLcode
|
---|
| 695 | mbedtls_connect_common(struct connectdata *conn,
|
---|
| 696 | int sockindex,
|
---|
| 697 | bool nonblocking,
|
---|
| 698 | bool *done)
|
---|
| 699 | {
|
---|
| 700 | CURLcode retcode;
|
---|
| 701 | struct SessionHandle *data = conn->data;
|
---|
| 702 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
| 703 | curl_socket_t sockfd = conn->sock[sockindex];
|
---|
| 704 | long timeout_ms;
|
---|
| 705 | int what;
|
---|
| 706 |
|
---|
| 707 | /* check if the connection has already been established */
|
---|
| 708 | if(ssl_connection_complete == connssl->state) {
|
---|
| 709 | *done = TRUE;
|
---|
| 710 | return CURLE_OK;
|
---|
| 711 | }
|
---|
| 712 |
|
---|
| 713 | if(ssl_connect_1==connssl->connecting_state) {
|
---|
| 714 | /* Find out how much more time we're allowed */
|
---|
| 715 | timeout_ms = Curl_timeleft(data, NULL, TRUE);
|
---|
| 716 |
|
---|
| 717 | if(timeout_ms < 0) {
|
---|
| 718 | /* no need to continue if time already is up */
|
---|
| 719 | failf(data, "SSL connection timeout");
|
---|
| 720 | return CURLE_OPERATION_TIMEDOUT;
|
---|
| 721 | }
|
---|
| 722 | retcode = mbedtls_connect_step1(conn, sockindex);
|
---|
| 723 | if(retcode)
|
---|
| 724 | return retcode;
|
---|
| 725 | }
|
---|
| 726 |
|
---|
| 727 | while(ssl_connect_2 == connssl->connecting_state ||
|
---|
| 728 | ssl_connect_2_reading == connssl->connecting_state ||
|
---|
| 729 | ssl_connect_2_writing == connssl->connecting_state) {
|
---|
| 730 |
|
---|
| 731 | /* check allowed time left */
|
---|
| 732 | timeout_ms = Curl_timeleft(data, NULL, TRUE);
|
---|
| 733 |
|
---|
| 734 | if(timeout_ms < 0) {
|
---|
| 735 | /* no need to continue if time already is up */
|
---|
| 736 | failf(data, "SSL connection timeout");
|
---|
| 737 | return CURLE_OPERATION_TIMEDOUT;
|
---|
| 738 | }
|
---|
| 739 |
|
---|
| 740 | /* if ssl is expecting something, check if it's available. */
|
---|
| 741 | if(connssl->connecting_state == ssl_connect_2_reading
|
---|
| 742 | || connssl->connecting_state == ssl_connect_2_writing) {
|
---|
| 743 |
|
---|
| 744 | curl_socket_t writefd = ssl_connect_2_writing==
|
---|
| 745 | connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
|
---|
| 746 | curl_socket_t readfd = ssl_connect_2_reading==
|
---|
| 747 | connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
|
---|
| 748 |
|
---|
| 749 | what = Curl_socket_ready(readfd, writefd, nonblocking ? 0 : timeout_ms);
|
---|
| 750 | if(what < 0) {
|
---|
| 751 | /* fatal error */
|
---|
| 752 | failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
|
---|
| 753 | return CURLE_SSL_CONNECT_ERROR;
|
---|
| 754 | }
|
---|
| 755 | else if(0 == what) {
|
---|
| 756 | if(nonblocking) {
|
---|
| 757 | *done = FALSE;
|
---|
| 758 | return CURLE_OK;
|
---|
| 759 | }
|
---|
| 760 | else {
|
---|
| 761 | /* timeout */
|
---|
| 762 | failf(data, "SSL connection timeout");
|
---|
| 763 | return CURLE_OPERATION_TIMEDOUT;
|
---|
| 764 | }
|
---|
| 765 | }
|
---|
| 766 | /* socket is readable or writable */
|
---|
| 767 | }
|
---|
| 768 |
|
---|
| 769 | /* Run transaction, and return to the caller if it failed or if
|
---|
| 770 | * this connection is part of a multi handle and this loop would
|
---|
| 771 | * execute again. This permits the owner of a multi handle to
|
---|
| 772 | * abort a connection attempt before step2 has completed while
|
---|
| 773 | * ensuring that a client using select() or epoll() will always
|
---|
| 774 | * have a valid fdset to wait on.
|
---|
| 775 | */
|
---|
| 776 | retcode = mbedtls_connect_step2(conn, sockindex);
|
---|
| 777 | if(retcode || (nonblocking &&
|
---|
| 778 | (ssl_connect_2 == connssl->connecting_state ||
|
---|
| 779 | ssl_connect_2_reading == connssl->connecting_state ||
|
---|
| 780 | ssl_connect_2_writing == connssl->connecting_state)))
|
---|
| 781 | return retcode;
|
---|
| 782 |
|
---|
| 783 | } /* repeat step2 until all transactions are done. */
|
---|
| 784 |
|
---|
| 785 | if(ssl_connect_3==connssl->connecting_state) {
|
---|
| 786 | retcode = mbedtls_connect_step3(conn, sockindex);
|
---|
| 787 | if(retcode)
|
---|
| 788 | return retcode;
|
---|
| 789 | }
|
---|
| 790 |
|
---|
| 791 | if(ssl_connect_done==connssl->connecting_state) {
|
---|
| 792 | connssl->state = ssl_connection_complete;
|
---|
| 793 | conn->recv[sockindex] = mbedtls_recv;
|
---|
| 794 | conn->send[sockindex] = mbedtls_send;
|
---|
| 795 | *done = TRUE;
|
---|
| 796 | }
|
---|
| 797 | else
|
---|
| 798 | *done = FALSE;
|
---|
| 799 |
|
---|
| 800 | /* Reset our connect state machine */
|
---|
| 801 | connssl->connecting_state = ssl_connect_1;
|
---|
| 802 |
|
---|
| 803 | return CURLE_OK;
|
---|
| 804 | }
|
---|
| 805 |
|
---|
| 806 | CURLcode
|
---|
| 807 | Curl_mbedtls_connect_nonblocking(struct connectdata *conn,
|
---|
| 808 | int sockindex,
|
---|
| 809 | bool *done)
|
---|
| 810 | {
|
---|
| 811 | return mbedtls_connect_common(conn, sockindex, TRUE, done);
|
---|
| 812 | }
|
---|
| 813 |
|
---|
| 814 |
|
---|
| 815 | CURLcode
|
---|
| 816 | Curl_mbedtls_connect(struct connectdata *conn,
|
---|
| 817 | int sockindex)
|
---|
| 818 | {
|
---|
| 819 | CURLcode retcode;
|
---|
| 820 | bool done = FALSE;
|
---|
| 821 |
|
---|
| 822 | retcode = mbedtls_connect_common(conn, sockindex, FALSE, &done);
|
---|
| 823 | if(retcode)
|
---|
| 824 | return retcode;
|
---|
| 825 |
|
---|
| 826 | DEBUGASSERT(done);
|
---|
| 827 |
|
---|
| 828 | return CURLE_OK;
|
---|
| 829 | }
|
---|
| 830 |
|
---|
| 831 | /*
|
---|
| 832 | * return 0 error initializing SSL
|
---|
| 833 | * return 1 SSL initialized successfully
|
---|
| 834 | */
|
---|
| 835 | int mbedtls_init(void)
|
---|
| 836 | {
|
---|
| 837 | return Curl_polarsslthreadlock_thread_setup();
|
---|
| 838 | }
|
---|
| 839 |
|
---|
| 840 | void mbedtls_cleanup(void)
|
---|
| 841 | {
|
---|
| 842 | (void)Curl_polarsslthreadlock_thread_cleanup();
|
---|
| 843 | }
|
---|
| 844 |
|
---|
| 845 | #endif /* USE_MBEDTLS */
|
---|