343 lines
10 KiB
C
343 lines
10 KiB
C
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#if defined(USE_HTTP3) && \
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(defined(USE_OPENSSL) || defined(USE_GNUTLS) || defined(USE_WOLFSSL))
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#ifdef USE_OPENSSL
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#include <openssl/err.h>
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#include "vtls/openssl.h"
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#elif defined(USE_GNUTLS)
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#include <gnutls/abstract.h>
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#include <gnutls/gnutls.h>
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#include <gnutls/x509.h>
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#include <gnutls/crypto.h>
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#include <nettle/sha2.h>
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#include "vtls/gtls.h"
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#elif defined(USE_WOLFSSL)
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#include <wolfssl/options.h>
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#include <wolfssl/ssl.h>
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#include <wolfssl/quic.h>
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#include "vtls/wolfssl.h"
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#endif
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#include "urldata.h"
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#include "curl_trc.h"
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#include "cfilters.h"
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#include "multiif.h"
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#include "vtls/keylog.h"
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#include "vtls/vtls.h"
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#include "vquic-tls.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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#ifndef ARRAYSIZE
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#define ARRAYSIZE(A) (sizeof(A)/sizeof((A)[0]))
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#endif
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#if defined(USE_WOLFSSL)
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#define QUIC_CIPHERS \
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"TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_" \
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"POLY1305_SHA256:TLS_AES_128_CCM_SHA256"
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#define QUIC_GROUPS "P-256:P-384:P-521"
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#if defined(HAVE_SECRET_CALLBACK)
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static void keylog_callback(const WOLFSSL *ssl, const char *line)
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{
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(void)ssl;
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Curl_tls_keylog_write_line(line);
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}
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#endif
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static CURLcode curl_wssl_init_ctx(struct curl_tls_ctx *ctx,
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struct Curl_cfilter *cf,
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struct Curl_easy *data,
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Curl_vquic_tls_ctx_setup *cb_setup,
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void *cb_user_data)
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{
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struct ssl_primary_config *conn_config;
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CURLcode result = CURLE_FAILED_INIT;
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conn_config = Curl_ssl_cf_get_primary_config(cf);
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if(!conn_config) {
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result = CURLE_FAILED_INIT;
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goto out;
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}
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ctx->ssl_ctx = wolfSSL_CTX_new(wolfTLSv1_3_client_method());
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if(!ctx->ssl_ctx) {
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result = CURLE_OUT_OF_MEMORY;
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goto out;
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}
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if(cb_setup) {
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result = cb_setup(cf, data, cb_user_data);
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if(result)
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goto out;
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}
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wolfSSL_CTX_set_default_verify_paths(ctx->ssl_ctx);
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if(wolfSSL_CTX_set_cipher_list(ctx->ssl_ctx, conn_config->cipher_list13 ?
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conn_config->cipher_list13 :
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QUIC_CIPHERS) != 1) {
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char error_buffer[256];
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ERR_error_string_n(ERR_get_error(), error_buffer, sizeof(error_buffer));
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failf(data, "wolfSSL failed to set ciphers: %s", error_buffer);
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result = CURLE_BAD_FUNCTION_ARGUMENT;
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goto out;
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}
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if(wolfSSL_CTX_set1_groups_list(ctx->ssl_ctx, conn_config->curves ?
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conn_config->curves :
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(char *)QUIC_GROUPS) != 1) {
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failf(data, "wolfSSL failed to set curves");
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result = CURLE_BAD_FUNCTION_ARGUMENT;
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goto out;
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}
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/* Open the file if a TLS or QUIC backend has not done this before. */
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Curl_tls_keylog_open();
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if(Curl_tls_keylog_enabled()) {
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#if defined(HAVE_SECRET_CALLBACK)
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wolfSSL_CTX_set_keylog_callback(ctx->ssl_ctx, keylog_callback);
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#else
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failf(data, "wolfSSL was built without keylog callback");
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result = CURLE_NOT_BUILT_IN;
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goto out;
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#endif
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}
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if(conn_config->verifypeer) {
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const char * const ssl_cafile = conn_config->CAfile;
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const char * const ssl_capath = conn_config->CApath;
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wolfSSL_CTX_set_verify(ctx->ssl_ctx, SSL_VERIFY_PEER, NULL);
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if(ssl_cafile || ssl_capath) {
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/* tell wolfSSL where to find CA certificates that are used to verify
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the server's certificate. */
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int rc =
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wolfSSL_CTX_load_verify_locations_ex(ctx->ssl_ctx, ssl_cafile,
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ssl_capath,
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WOLFSSL_LOAD_FLAG_IGNORE_ERR);
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if(SSL_SUCCESS != rc) {
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/* Fail if we insist on successfully verifying the server. */
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failf(data, "error setting certificate verify locations:"
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" CAfile: %s CApath: %s",
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ssl_cafile ? ssl_cafile : "none",
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ssl_capath ? ssl_capath : "none");
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result = CURLE_SSL_CACERT_BADFILE;
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goto out;
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}
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infof(data, " CAfile: %s", ssl_cafile ? ssl_cafile : "none");
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infof(data, " CApath: %s", ssl_capath ? ssl_capath : "none");
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}
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#ifdef CURL_CA_FALLBACK
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else {
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/* verifying the peer without any CA certificates won't work so
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use wolfssl's built-in default as fallback */
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wolfSSL_CTX_set_default_verify_paths(ctx->ssl_ctx);
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}
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#endif
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}
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else {
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wolfSSL_CTX_set_verify(ctx->ssl_ctx, SSL_VERIFY_NONE, NULL);
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}
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/* give application a chance to interfere with SSL set up. */
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if(data->set.ssl.fsslctx) {
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Curl_set_in_callback(data, true);
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result = (*data->set.ssl.fsslctx)(data, ctx->ssl_ctx,
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data->set.ssl.fsslctxp);
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Curl_set_in_callback(data, false);
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if(result) {
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failf(data, "error signaled by ssl ctx callback");
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goto out;
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}
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}
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result = CURLE_OK;
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out:
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if(result && ctx->ssl_ctx) {
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SSL_CTX_free(ctx->ssl_ctx);
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ctx->ssl_ctx = NULL;
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}
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return result;
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}
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/** SSL callbacks ***/
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static CURLcode curl_wssl_init_ssl(struct curl_tls_ctx *ctx,
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struct Curl_easy *data,
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struct ssl_peer *peer,
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const char *alpn, size_t alpn_len,
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void *user_data)
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{
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(void)data;
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DEBUGASSERT(!ctx->ssl);
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DEBUGASSERT(ctx->ssl_ctx);
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ctx->ssl = wolfSSL_new(ctx->ssl_ctx);
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wolfSSL_set_app_data(ctx->ssl, user_data);
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wolfSSL_set_connect_state(ctx->ssl);
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wolfSSL_set_quic_use_legacy_codepoint(ctx->ssl, 0);
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if(alpn)
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wolfSSL_set_alpn_protos(ctx->ssl, (const unsigned char *)alpn,
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(int)alpn_len);
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if(peer->sni) {
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wolfSSL_UseSNI(ctx->ssl, WOLFSSL_SNI_HOST_NAME,
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peer->sni, (unsigned short)strlen(peer->sni));
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}
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return CURLE_OK;
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}
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#endif /* defined(USE_WOLFSSL) */
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CURLcode Curl_vquic_tls_init(struct curl_tls_ctx *ctx,
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struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct ssl_peer *peer,
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const char *alpn, size_t alpn_len,
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Curl_vquic_tls_ctx_setup *cb_setup,
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void *cb_user_data, void *ssl_user_data)
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{
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CURLcode result;
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#ifdef USE_OPENSSL
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(void)result;
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return Curl_ossl_ctx_init(&ctx->ossl, cf, data, peer, TRNSPRT_QUIC,
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(const unsigned char *)alpn, alpn_len,
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cb_setup, cb_user_data, NULL, ssl_user_data);
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#elif defined(USE_GNUTLS)
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(void)result;
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return Curl_gtls_ctx_init(&ctx->gtls, cf, data, peer,
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(const unsigned char *)alpn, alpn_len,
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cb_setup, cb_user_data, ssl_user_data);
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#elif defined(USE_WOLFSSL)
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result = curl_wssl_init_ctx(ctx, cf, data, cb_setup, cb_user_data);
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if(result)
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return result;
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return curl_wssl_init_ssl(ctx, data, peer, alpn, alpn_len, ssl_user_data);
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#else
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#error "no TLS lib in used, should not happen"
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return CURLE_FAILED_INIT;
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#endif
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}
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void Curl_vquic_tls_cleanup(struct curl_tls_ctx *ctx)
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{
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#ifdef USE_OPENSSL
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if(ctx->ossl.ssl)
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SSL_free(ctx->ossl.ssl);
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if(ctx->ossl.ssl_ctx)
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SSL_CTX_free(ctx->ossl.ssl_ctx);
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#elif defined(USE_GNUTLS)
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if(ctx->gtls.cred)
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gnutls_certificate_free_credentials(ctx->gtls.cred);
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if(ctx->gtls.session)
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gnutls_deinit(ctx->gtls.session);
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#elif defined(USE_WOLFSSL)
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if(ctx->ssl)
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wolfSSL_free(ctx->ssl);
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if(ctx->ssl_ctx)
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wolfSSL_CTX_free(ctx->ssl_ctx);
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#endif
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memset(ctx, 0, sizeof(*ctx));
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}
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CURLcode Curl_vquic_tls_before_recv(struct curl_tls_ctx *ctx,
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struct Curl_cfilter *cf,
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struct Curl_easy *data)
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{
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#ifdef USE_OPENSSL
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if(!ctx->ossl.x509_store_setup) {
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CURLcode result = Curl_ssl_setup_x509_store(cf, data, ctx->ossl.ssl_ctx);
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if(result)
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return result;
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ctx->ossl.x509_store_setup = TRUE;
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}
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#elif defined(USE_GNUTLS)
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if(!ctx->gtls.trust_setup) {
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CURLcode result = Curl_gtls_client_trust_setup(cf, data, &ctx->gtls);
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if(result)
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return result;
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}
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#else
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(void)ctx; (void)cf; (void)data;
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#endif
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return CURLE_OK;
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}
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CURLcode Curl_vquic_tls_verify_peer(struct curl_tls_ctx *ctx,
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struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct ssl_peer *peer)
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{
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struct ssl_primary_config *conn_config;
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CURLcode result = CURLE_OK;
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conn_config = Curl_ssl_cf_get_primary_config(cf);
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if(!conn_config)
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return CURLE_FAILED_INIT;
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#ifdef USE_OPENSSL
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(void)conn_config;
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result = Curl_oss_check_peer_cert(cf, data, &ctx->ossl, peer);
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#elif defined(USE_GNUTLS)
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if(conn_config->verifyhost) {
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result = Curl_gtls_verifyserver(data, ctx->gtls.session,
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conn_config, &data->set.ssl, peer,
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data->set.str[STRING_SSL_PINNEDPUBLICKEY]);
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if(result)
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return result;
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}
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#elif defined(USE_WOLFSSL)
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(void)data;
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if(conn_config->verifyhost) {
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if(peer->sni) {
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WOLFSSL_X509* cert = wolfSSL_get_peer_certificate(ctx->ssl);
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if(wolfSSL_X509_check_host(cert, peer->sni, strlen(peer->sni), 0, NULL)
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== WOLFSSL_FAILURE) {
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result = CURLE_PEER_FAILED_VERIFICATION;
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}
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wolfSSL_X509_free(cert);
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}
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}
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#endif
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return result;
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}
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#endif /* !USE_HTTP3 && (USE_OPENSSL || USE_GNUTLS || USE_WOLFSSL) */
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