mirror of
https://github.com/kidfromjupiter/nearby.git
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hai007
05ae5583f8
them with chromium ::crypto symbols of the same names. PiperOrigin-RevId: 684566882
130 lines
3.7 KiB
C++
130 lines
3.7 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "internal/crypto_cros/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 <vector>
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#ifdef NEARBY_CHROMIUM
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#include "base/check.h"
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#elif defined(NEARBY_SWIFTPM)
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#include "internal/platform/logging.h"
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#else
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#include "absl/log/check.h" // nogncheck
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#endif
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#include "absl/types/span.h"
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#include "internal/crypto_cros/openssl_util.h"
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#include <openssl/bn.h>
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#include <openssl/bytestring.h>
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#include <openssl/evp.h>
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#include <openssl/mem.h>
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#include <openssl/rsa.h>
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namespace nearby::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;
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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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absl::Span<const uint8_t> input) {
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OpenSSLErrStackTracer err_tracer;
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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_id(key) != EVP_PKEY_RSA) 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) 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())) 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;
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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;
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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 nearby::crypto
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