109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
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// Copyright 2015 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/ssl/ssl_platform_key_util.h"
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#include "base/lazy_instance.h"
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#include "base/logging.h"
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#include "base/strings/string_piece.h"
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#include "base/task/single_thread_task_runner.h"
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#include "base/threading/thread.h"
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#include "crypto/openssl_util.h"
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#include "net/cert/asn1_util.h"
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#include "net/cert/x509_certificate.h"
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#include "net/cert/x509_util.h"
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#include "third_party/boringssl/src/include/openssl/bytestring.h"
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#include "third_party/boringssl/src/include/openssl/ec_key.h"
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#include "third_party/boringssl/src/include/openssl/evp.h"
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#include "third_party/boringssl/src/include/openssl/rsa.h"
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namespace net {
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namespace {
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class SSLPlatformKeyTaskRunner {
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public:
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SSLPlatformKeyTaskRunner() : worker_thread_("Platform Key Thread") {
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base::Thread::Options options;
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options.joinable = false;
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worker_thread_.StartWithOptions(std::move(options));
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}
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SSLPlatformKeyTaskRunner(const SSLPlatformKeyTaskRunner&) = delete;
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SSLPlatformKeyTaskRunner& operator=(const SSLPlatformKeyTaskRunner&) = delete;
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~SSLPlatformKeyTaskRunner() = default;
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scoped_refptr<base::SingleThreadTaskRunner> task_runner() {
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return worker_thread_.task_runner();
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}
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private:
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base::Thread worker_thread_;
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};
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base::LazyInstance<SSLPlatformKeyTaskRunner>::Leaky g_platform_key_task_runner =
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LAZY_INSTANCE_INITIALIZER;
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} // namespace
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scoped_refptr<base::SingleThreadTaskRunner> GetSSLPlatformKeyTaskRunner() {
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return g_platform_key_task_runner.Get().task_runner();
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}
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bssl::UniquePtr<EVP_PKEY> GetClientCertPublicKey(
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const X509Certificate* certificate) {
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crypto::OpenSSLErrStackTracer tracker(FROM_HERE);
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base::StringPiece spki;
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if (!asn1::ExtractSPKIFromDERCert(
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x509_util::CryptoBufferAsStringPiece(certificate->cert_buffer()),
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&spki)) {
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LOG(ERROR) << "Could not extract SPKI from certificate.";
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return nullptr;
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}
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CBS cbs;
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CBS_init(&cbs, reinterpret_cast<const uint8_t*>(spki.data()), spki.size());
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bssl::UniquePtr<EVP_PKEY> key(EVP_parse_public_key(&cbs));
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if (!key || CBS_len(&cbs) != 0) {
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LOG(ERROR) << "Could not parse public key.";
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return nullptr;
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}
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return key;
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}
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bool GetClientCertInfo(const X509Certificate* certificate,
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int* out_type,
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size_t* out_max_length) {
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bssl::UniquePtr<EVP_PKEY> key = GetClientCertPublicKey(certificate);
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if (!key) {
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return false;
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}
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*out_type = EVP_PKEY_id(key.get());
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*out_max_length = EVP_PKEY_size(key.get());
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return true;
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}
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absl::optional<std::vector<uint8_t>> AddPSSPadding(
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EVP_PKEY* pubkey,
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const EVP_MD* md,
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base::span<const uint8_t> digest) {
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RSA* rsa = EVP_PKEY_get0_RSA(pubkey);
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if (!rsa) {
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return absl::nullopt;
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}
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std::vector<uint8_t> ret(RSA_size(rsa));
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if (digest.size() != EVP_MD_size(md) ||
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!RSA_padding_add_PKCS1_PSS_mgf1(rsa, ret.data(), digest.data(), md, md,
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-1 /* salt length is digest length */)) {
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return absl::nullopt;
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}
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return ret;
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}
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} // namespace net
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