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