1 /*
2 * Copyright 2020 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 #pragma once
18
19 #include <aidl/android/hardware/security/keymint/Digest.h>
20
21 #include <openssl/evp.h>
22 #include <openssl/x509.h>
23
24 namespace aidl::android::hardware::security::keymint {
25
26 template <typename T, void (*F)(T*)>
27 struct UniquePtrDeleter {
operatorUniquePtrDeleter28 void operator()(T* p) const { F(p); }
29 };
30
31 typedef UniquePtrDeleter<EVP_PKEY, EVP_PKEY_free> EVP_PKEY_Delete;
32
33 #define MAKE_OPENSSL_PTR_TYPE(type) \
34 typedef std::unique_ptr<type, UniquePtrDeleter<type, type##_free>> type##_Ptr;
35
36 MAKE_OPENSSL_PTR_TYPE(ASN1_OBJECT)
37 MAKE_OPENSSL_PTR_TYPE(BN_CTX)
38 MAKE_OPENSSL_PTR_TYPE(EC_GROUP)
39 MAKE_OPENSSL_PTR_TYPE(EC_KEY)
40 MAKE_OPENSSL_PTR_TYPE(EC_POINT)
41 MAKE_OPENSSL_PTR_TYPE(EVP_PKEY)
42 MAKE_OPENSSL_PTR_TYPE(EVP_PKEY_CTX)
43 MAKE_OPENSSL_PTR_TYPE(RSA)
44 MAKE_OPENSSL_PTR_TYPE(X509)
45 MAKE_OPENSSL_PTR_TYPE(X509_NAME)
46
47 typedef std::unique_ptr<BIGNUM, UniquePtrDeleter<BIGNUM, BN_free>> BIGNUM_Ptr;
48
openssl_digest(Digest digest)49 inline const EVP_MD* openssl_digest(Digest digest) {
50 switch (digest) {
51 case Digest::NONE:
52 return nullptr;
53 case Digest::MD5:
54 return EVP_md5();
55 case Digest::SHA1:
56 return EVP_sha1();
57 case Digest::SHA_2_224:
58 return EVP_sha224();
59 case Digest::SHA_2_256:
60 return EVP_sha256();
61 case Digest::SHA_2_384:
62 return EVP_sha384();
63 case Digest::SHA_2_512:
64 return EVP_sha512();
65 }
66 return nullptr;
67 }
68
69 } // namespace aidl::android::hardware::security::keymint
70