Ryan Macnak
42d796f7c1
TEST=ci Bug: https://github.com/flutter/flutter/issues/170723 Change-Id: I381c0dac8f7e308830c8bba472e11fb20939708e Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/436501 Reviewed-by: Brian Quinlan <bquinlan@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
120 lines
4.1 KiB
C++
120 lines
4.1 KiB
C++
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#if !defined(DART_IO_SECURE_SOCKET_DISABLED)
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#include "platform/globals.h"
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#if defined(DART_HOST_OS_LINUX) || defined(DART_HOST_OS_ANDROID)
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#include "bin/security_context.h"
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#include <openssl/bio.h>
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#include <openssl/ssl.h>
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#include <openssl/x509.h>
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#include "bin/directory.h"
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#include "bin/file.h"
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#include "bin/secure_socket_filter.h"
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#include "bin/secure_socket_utils.h"
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#include "platform/syslog.h"
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namespace dart {
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namespace bin {
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// The security context won't necessarily use the compiled-in root certificates,
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// but since there is no way to update the size of the allocation after creating
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// the weak persistent handle, we assume that it will. Note that when the
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// root certs aren't compiled in, |root_certificates_pem_length| is 0.
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const intptr_t SSLCertContext::kApproximateSize =
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sizeof(SSLCertContext) + root_certificates_pem_length;
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void SSLCertContext::TrustBuiltinRoots() {
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// First, try to use locations specified on the command line.
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if (root_certs_file() != nullptr) {
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LoadRootCertFile(root_certs_file());
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return;
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}
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if (root_certs_cache() != nullptr) {
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LoadRootCertCache(root_certs_cache());
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return;
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}
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if (bypass_trusting_system_roots()) {
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if (SSL_LOG_STATUS) {
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Syslog::Print("Bypass trusting built-in system roots\n");
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}
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} else {
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#if defined(DART_HOST_OS_ANDROID)
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// On Android, we don't compile in the trusted root certificates. Instead,
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// we use the directory of trusted certificates already present on the
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// device. This saves ~240KB from the size of the binary. This has the
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// drawback that SSL_do_handshake will synchronously hit the filesystem
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// looking for root certs during its trust evaluation. We call
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// SSL_do_handshake directly from the Dart thread so that Dart code can be
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// invoked from the "bad certificate" callback called by SSL_do_handshake.
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const char* android_cacerts = "/system/etc/security/cacerts";
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LoadRootCertCache(android_cacerts);
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return;
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#else
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// On Linux, we use the compiled-in trusted certs as a last resort. First,
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// we try to find the trusted certs in various standard locations. A good
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// discussion of the complexities of this endeavor can be found here:
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//
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// https://www.happyassassin.net/2015/01/12/a-note-about-ssltls-trusted-certificate-stores-and-platforms/
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//
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// This set of locations was copied from gRPC.
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const char* kCertFiles[] = {
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"/etc/ssl/certs/ca-certificates.crt",
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"/etc/pki/tls/certs/ca-bundle.crt",
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"/etc/ssl/ca-bundle.pem",
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"/etc/pki/tls/cacert.pem",
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"/etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem",
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};
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const char* kCertDirectories[] = {
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"/etc/ssl/certs", "/system/etc/security/cacerts",
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"/usr/local/share/certs", "/etc/pki/tls/certs",
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"/etc/openssl/certs",
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};
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for (size_t i = 0; i < ARRAY_SIZE(kCertFiles); i++) {
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const char* bundle = kCertFiles[i];
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if (File::Exists(nullptr, bundle)) {
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LoadRootCertFile(bundle);
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return;
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}
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}
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for (size_t i = 0; i < ARRAY_SIZE(kCertDirectories); i++) {
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const char* cachedir = kCertDirectories[i];
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if (Directory::Exists(nullptr, cachedir) == Directory::EXISTS) {
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LoadRootCertCache(cachedir);
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return;
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}
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}
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#endif
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}
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#if defined(DART_HOST_OS_LINUX)
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// Fall back on the compiled-in certs if the standard locations don't exist.
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if (SSL_LOG_STATUS) {
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Syslog::Print("Trusting compiled-in roots\n");
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}
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AddCompiledInCerts();
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#endif
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}
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void SSLCertContext::RegisterCallbacks(SSL* ssl) {
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// No callbacks to register for implementations using BoringSSL's built-in
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// verification mechanism.
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}
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TrustEvaluateHandlerFunc SSLCertContext::GetTrustEvaluateHandler() {
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return nullptr;
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}
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} // namespace bin
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} // namespace dart
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#endif // defined(DART_HOST_OS_LINUX) || defined(DART_HOST_OS_ANDROID)
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#endif // !defined(DART_IO_SECURE_SOCKET_DISABLED)
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