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