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rustls: support ECH GREASE
e.g. `curl --tlsv1.3 --ech grease ...`
This commit is contained in:
Daniel McCarney
Daniel Stenberg
parent
1c8c93ae15
commit
233b668903
3 changed files with 65 additions and 7 deletions
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@ -37,7 +37,7 @@
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# HAVE_GNUTLS_SRP: `gnutls_srp_verifier` present in GnuTLS
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# HAVE_SSL_SET_QUIC_USE_LEGACY_CODEPOINT: `SSL_set_quic_use_legacy_codepoint` present in OpenSSL/wolfSSL
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# HAVE_QUICHE_CONN_SET_QLOG_FD: `quiche_conn_set_qlog_fd` present in quiche
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# HAVE_ECH: ECH API checks for OpenSSL, BoringSSL or wolfSSL
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# HAVE_ECH: ECH API checks for OpenSSL, BoringSSL, wolfSSL or rustls-ffi
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#
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# For each of the above variables, if the variable is DEFINED (either
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# to ON or OFF), the symbol detection is skipped. If the variable is
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@ -1065,7 +1065,7 @@ endif()
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option(USE_HTTPSRR "Enable HTTPS RR support" OFF)
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option(USE_ECH "Enable ECH support" OFF)
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if(USE_ECH)
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if(USE_OPENSSL OR USE_WOLFSSL)
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if(USE_OPENSSL OR USE_WOLFSSL OR USE_RUSTLS)
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# Be sure that the TLS library actually supports ECH.
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if(USE_WOLFSSL)
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curl_openssl_check_exists("wolfSSL_CTX_GenerateEchConfig" HAVE_WOLFSSL_CTX_GENERATEECHCONFIG)
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@ -1074,11 +1074,12 @@ if(USE_ECH)
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curl_openssl_check_exists("SSL_set1_ech_config_list" HAVE_SSL_SET1_ECH_CONFIG_LIST)
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endif()
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if(HAVE_WOLFSSL_CTX_GENERATEECHCONFIG OR
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HAVE_SSL_SET1_ECH_CONFIG_LIST)
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HAVE_SSL_SET1_ECH_CONFIG_LIST OR
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USE_RUSTLS)
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set(HAVE_ECH 1)
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endif()
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if(NOT HAVE_ECH)
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message(FATAL_ERROR "ECH support missing in OpenSSL/BoringSSL/AWS-LC/wolfSSL")
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message(FATAL_ERROR "ECH support missing in OpenSSL/BoringSSL/AWS-LC/wolfSSL/rustls-ffi")
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else()
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message(STATUS "ECH enabled")
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# ECH wants HTTPSRR
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@ -1086,7 +1087,7 @@ if(USE_ECH)
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message(STATUS "HTTPSRR enabled")
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endif()
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else()
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message(FATAL_ERROR "ECH requires ECH-enabled OpenSSL, BoringSSL, AWS-LC or wolfSSL")
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message(FATAL_ERROR "ECH requires ECH-enabled OpenSSL, BoringSSL, AWS-LC, wolfSSL or rustls-ffi")
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endif()
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endif()
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@ -4888,6 +4888,7 @@ if test "x$want_ech" != "xno"; then
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ECH_ENABLED=0
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ECH_ENABLED_OPENSSL=0
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ECH_ENABLED_WOLFSSL=0
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ECH_ENABLED_RUSTLS=0
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ECH_SUPPORT=''
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dnl check for OpenSSL equivalent
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@ -4901,10 +4902,15 @@ if test "x$want_ech" != "xno"; then
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ECH_SUPPORT="$ECH_SUPPORT wolfSSL"
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ECH_ENABLED_WOLFSSL=1)
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fi
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if test "x$RUSTLS_ENABLED" = "x1"; then
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ECH_SUPPORT="$ECH_SUPPORT rustls-ffi"
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ECH_ENABLED_RUSTLS=1
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fi
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dnl now deal with whatever we found
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if test "x$ECH_ENABLED_OPENSSL" = "x1" -o \
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"x$ECH_ENABLED_WOLFSSL" = "x1"; then
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"x$ECH_ENABLED_WOLFSSL" = "x1" -o \
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"x$ECH_ENABLED_RUSTLS" = "x1"; then
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AC_DEFINE(USE_ECH, 1, [if ECH support is available])
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AC_MSG_RESULT(ECH support available via:$ECH_SUPPORT)
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experimental="$experimental ECH"
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@ -588,6 +588,14 @@ init_config_builder(struct Curl_easy *data,
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goto cleanup;
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}
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#if defined(USE_ECH)
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if(ECH_ENABLED(data)) {
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tls_versions[0] = RUSTLS_TLS_VERSION_TLSV1_3;
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tls_versions_len = 1;
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infof(data, "rustls: ECH enabled, forcing TLSv1.3");
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}
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#endif /* USE_ECH */
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cipher_suites = malloc(sizeof(cipher_suites) * (cipher_suites_len));
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if(!cipher_suites) {
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result = CURLE_OUT_OF_MEMORY;
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@ -889,6 +897,38 @@ cleanup:
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return result;
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}
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#if defined(USE_ECH)
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static CURLcode
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init_config_builder_ech(struct Curl_easy *data,
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struct rustls_client_config_builder *builder)
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{
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const rustls_hpke *hpke = rustls_supported_hpke();
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if(!hpke) {
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failf(data,
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"rustls: ECH unavailable, rustls-ffi built without "
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"HPKE compatible crypto provider");
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return CURLE_SSL_CONNECT_ERROR;
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}
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if(data->set.str[STRING_ECH_PUBLIC]) {
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failf(data, "rustls: ECH outername not supported");
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return CURLE_SSL_CONNECT_ERROR;
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}
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if(data->set.tls_ech == CURLECH_GREASE) {
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rustls_result rr;
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rr = rustls_client_config_builder_enable_ech_grease(builder, hpke);
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if(rr != RUSTLS_RESULT_OK) {
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rustls_failf(data, rr, "rustls: failed to configure ECH GREASE");
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return CURLE_SSL_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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#endif /* USE_ECH */
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static CURLcode
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cr_init_backend(struct Curl_cfilter *cf, struct Curl_easy *data,
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struct rustls_ssl_backend_data *const backend)
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@ -946,6 +986,16 @@ cr_init_backend(struct Curl_cfilter *cf, struct Curl_easy *data,
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}
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}
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#if defined(USE_ECH)
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if(ECH_ENABLED(data)) {
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result = init_config_builder_ech(data, config_builder);
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if(result != CURLE_OK && data->set.tls_ech & CURLECH_HARD) {
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rustls_client_config_builder_free(config_builder);
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return result;
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}
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}
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#endif /* USE_ECH */
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result = init_config_builder_keylog(data, config_builder);
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if(result != CURLE_OK) {
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rustls_client_config_builder_free(config_builder);
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@ -1269,7 +1319,8 @@ const struct Curl_ssl Curl_ssl_rustls = {
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SSLSUPP_HTTPS_PROXY |
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SSLSUPP_CIPHER_LIST |
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SSLSUPP_TLS13_CIPHERSUITES |
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SSLSUPP_CERTINFO,
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SSLSUPP_CERTINFO |
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SSLSUPP_ECH,
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sizeof(struct rustls_ssl_backend_data),
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NULL, /* init */
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