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114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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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 "crypto/rsa_private_key.h"
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#include <stdint.h>
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#include <memory>
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#include <utility>
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#include "base/logging.h"
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#include "crypto/openssl_util.h"
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#include "third_party/boringssl/src/include/openssl/bn.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/evp.h"
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#include "third_party/boringssl/src/include/openssl/mem.h"
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#include "third_party/boringssl/src/include/openssl/rsa.h"
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namespace crypto {
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// static
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std::unique_ptr<RSAPrivateKey> RSAPrivateKey::Create(uint16_t num_bits) {
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OpenSSLErrStackTracer err_tracer(FROM_HERE);
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bssl::UniquePtr<RSA> rsa_key(RSA_new());
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bssl::UniquePtr<BIGNUM> bn(BN_new());
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if (!rsa_key.get() || !bn.get() || !BN_set_word(bn.get(), 65537L))
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return nullptr;
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if (!RSA_generate_key_ex(rsa_key.get(), num_bits, bn.get(), nullptr))
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return nullptr;
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std::unique_ptr<RSAPrivateKey> result(new RSAPrivateKey);
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result->key_.reset(EVP_PKEY_new());
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if (!result->key_ || !EVP_PKEY_set1_RSA(result->key_.get(), rsa_key.get()))
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return nullptr;
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return result;
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}
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// static
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std::unique_ptr<RSAPrivateKey> RSAPrivateKey::CreateFromPrivateKeyInfo(
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const std::vector<uint8_t>& input) {
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OpenSSLErrStackTracer err_tracer(FROM_HERE);
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CBS cbs;
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CBS_init(&cbs, input.data(), input.size());
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bssl::UniquePtr<EVP_PKEY> pkey(EVP_parse_private_key(&cbs));
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if (!pkey || CBS_len(&cbs) != 0 || EVP_PKEY_id(pkey.get()) != EVP_PKEY_RSA)
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return nullptr;
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std::unique_ptr<RSAPrivateKey> result(new RSAPrivateKey);
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result->key_ = std::move(pkey);
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return result;
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}
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// static
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std::unique_ptr<RSAPrivateKey> RSAPrivateKey::CreateFromKey(EVP_PKEY* key) {
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DCHECK(key);
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if (EVP_PKEY_type(key->type) != EVP_PKEY_RSA)
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return nullptr;
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std::unique_ptr<RSAPrivateKey> copy(new RSAPrivateKey);
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copy->key_ = bssl::UpRef(key);
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return copy;
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}
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RSAPrivateKey::RSAPrivateKey() = default;
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RSAPrivateKey::~RSAPrivateKey() = default;
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std::unique_ptr<RSAPrivateKey> RSAPrivateKey::Copy() const {
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std::unique_ptr<RSAPrivateKey> copy(new RSAPrivateKey);
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bssl::UniquePtr<RSA> rsa(EVP_PKEY_get1_RSA(key_.get()));
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if (!rsa)
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return nullptr;
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copy->key_.reset(EVP_PKEY_new());
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if (!EVP_PKEY_set1_RSA(copy->key_.get(), rsa.get()))
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return nullptr;
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return copy;
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}
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bool RSAPrivateKey::ExportPrivateKey(std::vector<uint8_t>* output) const {
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OpenSSLErrStackTracer err_tracer(FROM_HERE);
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uint8_t *der;
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size_t der_len;
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bssl::ScopedCBB cbb;
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if (!CBB_init(cbb.get(), 0) ||
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!EVP_marshal_private_key(cbb.get(), key_.get()) ||
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!CBB_finish(cbb.get(), &der, &der_len)) {
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return false;
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}
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output->assign(der, der + der_len);
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OPENSSL_free(der);
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return true;
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}
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bool RSAPrivateKey::ExportPublicKey(std::vector<uint8_t>* output) const {
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OpenSSLErrStackTracer err_tracer(FROM_HERE);
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uint8_t *der;
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size_t der_len;
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bssl::ScopedCBB cbb;
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if (!CBB_init(cbb.get(), 0) ||
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!EVP_marshal_public_key(cbb.get(), key_.get()) ||
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!CBB_finish(cbb.get(), &der, &der_len)) {
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return false;
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}
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output->assign(der, der + der_len);
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OPENSSL_free(der);
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return true;
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}
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} // namespace crypto
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