610 lines
18 KiB
C
610 lines
18 KiB
C
/***************************************************************************
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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(ENABLE_QUIC) && \
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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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#ifdef USE_OPENSSL
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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:X25519:P-384:P-521"
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#elif defined(USE_GNUTLS)
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#define QUIC_PRIORITY \
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"NORMAL:-VERS-ALL:+VERS-TLS1.3:-CIPHER-ALL:+AES-128-GCM:+AES-256-GCM:" \
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"+CHACHA20-POLY1305:+AES-128-CCM:-GROUP-ALL:+GROUP-SECP256R1:" \
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"+GROUP-X25519:+GROUP-SECP384R1:+GROUP-SECP521R1:" \
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"%DISABLE_TLS13_COMPAT_MODE"
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#elif 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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#endif
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#ifdef USE_OPENSSL
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static void keylog_callback(const SSL *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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static CURLcode curl_ossl_init_ctx(struct quic_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 *ctx_setup)
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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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DEBUGASSERT(!ctx->ssl_ctx);
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#ifdef USE_OPENSSL_QUIC
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ctx->ssl_ctx = SSL_CTX_new(OSSL_QUIC_client_method());
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#else
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ctx->ssl_ctx = SSL_CTX_new(TLS_method());
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#endif
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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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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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if(ctx_setup) {
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result = ctx_setup(ctx, cf, data);
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if(result)
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goto out;
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}
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SSL_CTX_set_default_verify_paths(ctx->ssl_ctx);
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{
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const char *curves = conn_config->curves ?
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conn_config->curves : QUIC_GROUPS;
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if(!SSL_CTX_set1_curves_list(ctx->ssl_ctx, curves)) {
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failf(data, "failed setting curves list for QUIC: '%s'", curves);
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return CURLE_SSL_CIPHER;
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}
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}
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#ifndef OPENSSL_IS_BORINGSSL
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{
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const char *ciphers13 = conn_config->cipher_list13 ?
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conn_config->cipher_list13 : QUIC_CIPHERS;
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if(SSL_CTX_set_ciphersuites(ctx->ssl_ctx, ciphers13) != 1) {
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failf(data, "failed setting QUIC cipher suite: %s", ciphers13);
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return CURLE_SSL_CIPHER;
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}
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infof(data, "QUIC cipher selection: %s", ciphers13);
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}
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#endif
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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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SSL_CTX_set_keylog_callback(ctx->ssl_ctx, keylog_callback);
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}
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/* OpenSSL always tries to verify the peer, this only says whether it should
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* fail to connect if the verification fails, or if it should continue
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* anyway. In the latter case the result of the verification is checked with
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* SSL_get_verify_result() below. */
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SSL_CTX_set_verify(ctx->ssl_ctx, conn_config->verifypeer ?
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SSL_VERIFY_PEER : SSL_VERIFY_NONE, NULL);
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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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/* When a user callback is installed to modify the SSL_CTX,
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* we need to do the full initialization before calling it.
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* See: #11800 */
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if(!ctx->x509_store_setup) {
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result = Curl_ssl_setup_x509_store(cf, data, ctx->ssl_ctx);
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if(result)
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goto out;
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ctx->x509_store_setup = TRUE;
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}
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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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static CURLcode curl_ossl_set_client_cert(struct quic_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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SSL_CTX *ssl_ctx = ctx->ssl_ctx;
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const struct ssl_config_data *ssl_config;
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ssl_config = Curl_ssl_cf_get_config(cf, data);
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DEBUGASSERT(ssl_config);
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if(ssl_config->primary.clientcert ||
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ssl_config->primary.cert_blob ||
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ssl_config->cert_type) {
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return Curl_ossl_set_client_cert(
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data, ssl_ctx, ssl_config->primary.clientcert,
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ssl_config->primary.cert_blob, ssl_config->cert_type,
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ssl_config->key, ssl_config->key_blob,
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ssl_config->key_type, ssl_config->key_passwd);
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}
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return CURLE_OK;
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}
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/** SSL callbacks ***/
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static CURLcode curl_ossl_init_ssl(struct quic_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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DEBUGASSERT(!ctx->ssl);
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ctx->ssl = SSL_new(ctx->ssl_ctx);
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SSL_set_app_data(ctx->ssl, user_data);
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SSL_set_connect_state(ctx->ssl);
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#ifndef USE_OPENSSL_QUIC
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SSL_set_quic_use_legacy_codepoint(ctx->ssl, 0);
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#endif
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if(alpn)
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SSL_set_alpn_protos(ctx->ssl, (const uint8_t *)alpn, (int)alpn_len);
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if(peer->sni) {
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if(!SSL_set_tlsext_host_name(ctx->ssl, peer->sni)) {
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failf(data, "Failed set SNI");
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SSL_free(ctx->ssl);
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ctx->ssl = NULL;
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return CURLE_QUIC_CONNECT_ERROR;
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}
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}
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return CURLE_OK;
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}
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#elif defined(USE_GNUTLS)
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static int keylog_callback(gnutls_session_t session, const char *label,
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const gnutls_datum_t *secret)
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{
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gnutls_datum_t crandom;
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gnutls_datum_t srandom;
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gnutls_session_get_random(session, &crandom, &srandom);
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if(crandom.size != 32) {
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return -1;
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}
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Curl_tls_keylog_write(label, crandom.data, secret->data, secret->size);
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return 0;
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}
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static CURLcode curl_gtls_init_ctx(struct quic_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 *ctx_setup,
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void *user_data)
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{
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struct ssl_primary_config *conn_config;
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CURLcode result;
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gnutls_datum_t alpns[5];
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/* this will need some attention when HTTPS proxy over QUIC get fixed */
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long * const pverifyresult = &data->set.ssl.certverifyresult;
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int rc;
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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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DEBUGASSERT(ctx->gtls == NULL);
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ctx->gtls = calloc(1, sizeof(*(ctx->gtls)));
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if(!ctx->gtls)
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return CURLE_OUT_OF_MEMORY;
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result = gtls_client_init(data, conn_config, &data->set.ssl,
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peer, ctx->gtls, pverifyresult);
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if(result)
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return result;
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gnutls_session_set_ptr(ctx->gtls->session, user_data);
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if(ctx_setup) {
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result = ctx_setup(ctx, cf, data);
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if(result)
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return result;
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}
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rc = gnutls_priority_set_direct(ctx->gtls->session, QUIC_PRIORITY, NULL);
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if(rc < 0) {
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CURL_TRC_CF(data, cf, "gnutls_priority_set_direct failed: %s\n",
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gnutls_strerror(rc));
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return CURLE_QUIC_CONNECT_ERROR;
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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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gnutls_session_set_keylog_function(ctx->gtls->session, keylog_callback);
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}
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/* convert the ALPN string from our arguments to a list of strings
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* that gnutls wants and will convert internally back to this very
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* string for sending to the server. nice. */
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if(alpn) {
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size_t i, alen = alpn_len;
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unsigned char *s = (unsigned char *)alpn;
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unsigned char slen;
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for(i = 0; (i < ARRAYSIZE(alpns)) && alen; ++i) {
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slen = s[0];
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if(slen >= alen)
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return CURLE_FAILED_INIT;
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alpns[i].data = s + 1;
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alpns[i].size = slen;
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s += slen + 1;
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alen -= (size_t)slen + 1;
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}
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if(alen) /* not all alpn chars used, wrong format or too many */
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return CURLE_FAILED_INIT;
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if(i) {
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gnutls_alpn_set_protocols(ctx->gtls->session,
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alpns, (unsigned int)i,
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GNUTLS_ALPN_MANDATORY);
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}
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}
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return CURLE_OK;
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}
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#elif defined(USE_WOLFSSL)
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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 quic_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 *ctx_setup)
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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(ctx_setup) {
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result = ctx_setup(ctx, cf, 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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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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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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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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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 quic_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;
|
|
}
|
|
#endif /* defined(USE_WOLFSSL) */
|
|
|
|
CURLcode Curl_vquic_tls_init(struct quic_tls_ctx *ctx,
|
|
struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
struct ssl_peer *peer,
|
|
const char *alpn, size_t alpn_len,
|
|
Curl_vquic_tls_ctx_setup *ctx_setup,
|
|
void *user_data)
|
|
{
|
|
CURLcode result;
|
|
|
|
#ifdef USE_OPENSSL
|
|
result = curl_ossl_init_ctx(ctx, cf, data, ctx_setup);
|
|
if(result)
|
|
return result;
|
|
|
|
result = curl_ossl_set_client_cert(ctx, cf, data);
|
|
if(result)
|
|
return result;
|
|
|
|
return curl_ossl_init_ssl(ctx, data, peer, alpn, alpn_len, user_data);
|
|
#elif defined(USE_GNUTLS)
|
|
(void)result;
|
|
return curl_gtls_init_ctx(ctx, cf, data, peer, alpn, alpn_len,
|
|
ctx_setup, user_data);
|
|
#elif defined(USE_WOLFSSL)
|
|
result = curl_wssl_init_ctx(ctx, cf, data, ctx_setup);
|
|
if(result)
|
|
return result;
|
|
|
|
return curl_wssl_init_ssl(ctx, data, peer, alpn, alpn_len, user_data);
|
|
#else
|
|
#error "no TLS lib in used, should not happen"
|
|
return CURLE_FAILED_INIT;
|
|
#endif
|
|
}
|
|
|
|
void Curl_vquic_tls_cleanup(struct quic_tls_ctx *ctx)
|
|
{
|
|
#ifdef USE_OPENSSL
|
|
if(ctx->ssl)
|
|
SSL_free(ctx->ssl);
|
|
if(ctx->ssl_ctx)
|
|
SSL_CTX_free(ctx->ssl_ctx);
|
|
#elif defined(USE_GNUTLS)
|
|
if(ctx->gtls) {
|
|
if(ctx->gtls->cred)
|
|
gnutls_certificate_free_credentials(ctx->gtls->cred);
|
|
if(ctx->gtls->session)
|
|
gnutls_deinit(ctx->gtls->session);
|
|
free(ctx->gtls);
|
|
}
|
|
#elif defined(USE_WOLFSSL)
|
|
if(ctx->ssl)
|
|
wolfSSL_free(ctx->ssl);
|
|
if(ctx->ssl_ctx)
|
|
wolfSSL_CTX_free(ctx->ssl_ctx);
|
|
#endif
|
|
memset(ctx, 0, sizeof(*ctx));
|
|
}
|
|
|
|
CURLcode Curl_vquic_tls_before_recv(struct quic_tls_ctx *ctx,
|
|
struct Curl_cfilter *cf,
|
|
struct Curl_easy *data)
|
|
{
|
|
#ifdef USE_OPENSSL
|
|
if(!ctx->x509_store_setup) {
|
|
CURLcode result = Curl_ssl_setup_x509_store(cf, data, ctx->ssl_ctx);
|
|
if(result)
|
|
return result;
|
|
ctx->x509_store_setup = TRUE;
|
|
}
|
|
#else
|
|
(void)ctx; (void)cf; (void)data;
|
|
#endif
|
|
return CURLE_OK;
|
|
}
|
|
|
|
CURLcode Curl_vquic_tls_verify_peer(struct quic_tls_ctx *ctx,
|
|
struct Curl_cfilter *cf,
|
|
struct Curl_easy *data,
|
|
struct ssl_peer *peer)
|
|
{
|
|
struct ssl_primary_config *conn_config;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
conn_config = Curl_ssl_cf_get_primary_config(cf);
|
|
if(!conn_config)
|
|
return CURLE_FAILED_INIT;
|
|
|
|
if(conn_config->verifyhost) {
|
|
#ifdef USE_OPENSSL
|
|
X509 *server_cert;
|
|
server_cert = SSL_get1_peer_certificate(ctx->ssl);
|
|
if(!server_cert) {
|
|
return CURLE_PEER_FAILED_VERIFICATION;
|
|
}
|
|
result = Curl_ossl_verifyhost(data, cf->conn, peer, server_cert);
|
|
X509_free(server_cert);
|
|
if(result)
|
|
return result;
|
|
#elif defined(USE_GNUTLS)
|
|
result = Curl_gtls_verifyserver(data, ctx->gtls->session,
|
|
conn_config, &data->set.ssl, peer,
|
|
data->set.str[STRING_SSL_PINNEDPUBLICKEY]);
|
|
if(result)
|
|
return result;
|
|
#elif defined(USE_WOLFSSL)
|
|
if(!peer->sni ||
|
|
wolfSSL_check_domain_name(ctx->ssl, peer->sni) == SSL_FAILURE)
|
|
return CURLE_PEER_FAILED_VERIFICATION;
|
|
#endif
|
|
infof(data, "Verified certificate just fine");
|
|
}
|
|
else
|
|
infof(data, "Skipped certificate verification");
|
|
#ifdef USE_OPENSSL
|
|
if(data->set.ssl.certinfo)
|
|
/* asked to gather certificate info */
|
|
(void)Curl_ossl_certchain(data, ctx->ssl);
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
|
|
#endif /* !ENABLE_QUIC && (USE_OPENSSL || USE_GNUTLS || USE_WOLFSSL) */
|