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70 lines
2.3 KiB
70 lines
2.3 KiB
/*
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* Copyright (C) 2019 The Android Open Source Project
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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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* http://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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*/
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#include "adb/crypto/rsa_2048_key.h"
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#include <android-base/logging.h>
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#include <crypto_utils/android_pubkey.h>
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#include <openssl/bn.h>
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#include <openssl/rsa.h>
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#include <sysdeps/env.h>
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namespace adb {
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namespace crypto {
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bool CalculatePublicKey(std::string* out, RSA* private_key) {
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uint8_t binary_key_data[ANDROID_PUBKEY_ENCODED_SIZE];
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if (!android_pubkey_encode(private_key, binary_key_data, sizeof(binary_key_data))) {
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LOG(ERROR) << "Failed to convert to public key";
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return false;
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}
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size_t expected_length;
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if (!EVP_EncodedLength(&expected_length, sizeof(binary_key_data))) {
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LOG(ERROR) << "Public key too large to base64 encode";
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return false;
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}
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out->resize(expected_length);
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size_t actual_length = EVP_EncodeBlock(reinterpret_cast<uint8_t*>(out->data()), binary_key_data,
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sizeof(binary_key_data));
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out->resize(actual_length);
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out->append(" ");
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out->append(sysdeps::GetLoginNameUTF8());
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out->append("@");
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out->append(sysdeps::GetHostNameUTF8());
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return true;
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}
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std::optional<Key> CreateRSA2048Key() {
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bssl::UniquePtr<EVP_PKEY> pkey(EVP_PKEY_new());
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bssl::UniquePtr<BIGNUM> exponent(BN_new());
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bssl::UniquePtr<RSA> rsa(RSA_new());
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if (!pkey || !exponent || !rsa) {
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LOG(ERROR) << "Failed to allocate key";
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return std::nullopt;
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}
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BN_set_word(exponent.get(), RSA_F4);
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RSA_generate_key_ex(rsa.get(), 2048, exponent.get(), nullptr);
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EVP_PKEY_set1_RSA(pkey.get(), rsa.get());
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return std::optional<Key>{Key(std::move(pkey), adb::proto::KeyType::RSA_2048)};
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}
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} // namespace crypto
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} // namespace adb
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