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
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