1 /*
2 * Copyright (C) 2019 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "adb/crypto/key.h"
18
19 #include <android-base/logging.h>
20 #include <openssl/bn.h>
21 #include <openssl/pem.h>
22 #include <openssl/rsa.h>
23
24 namespace adb {
25 namespace crypto {
26
27 // static
ToPEMString(EVP_PKEY * pkey)28 std::string Key::ToPEMString(EVP_PKEY* pkey) {
29 bssl::UniquePtr<BIO> bio(BIO_new(BIO_s_mem()));
30 int rc = PEM_write_bio_PKCS8PrivateKey(bio.get(), pkey, nullptr, nullptr, 0, nullptr, nullptr);
31 if (rc != 1) {
32 LOG(ERROR) << "PEM_write_bio_PKCS8PrivateKey failed";
33 return "";
34 }
35
36 BUF_MEM* mem = nullptr;
37 BIO_get_mem_ptr(bio.get(), &mem);
38 if (!mem || !mem->data || !mem->length) {
39 LOG(ERROR) << "BIO_get_mem_ptr failed";
40 return "";
41 }
42
43 return std::string(mem->data, mem->length);
44 }
45
46 } // namespace crypto
47 } // namespace adb
48