1 /*
2 * Copyright 2017 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 #ifndef HARDWARE_INTERFACES_KEYMASTER_4_0_SUPPORT_OPENSSL_UTILS_H_
18 #define HARDWARE_INTERFACES_KEYMASTER_4_0_SUPPORT_OPENSSL_UTILS_H_
19
20 #include <android/hardware/keymaster/4.0/types.h>
21
22 template <typename T, void (*F)(T*)>
23 struct UniquePtrDeleter {
operatorUniquePtrDeleter24 void operator()(T* p) const { F(p); }
25 };
26
27 typedef UniquePtrDeleter<EVP_PKEY, EVP_PKEY_free> EVP_PKEY_Delete;
28
29 #define MAKE_OPENSSL_PTR_TYPE(type) \
30 typedef std::unique_ptr<type, UniquePtrDeleter<type, type##_free>> type##_Ptr;
31
32 MAKE_OPENSSL_PTR_TYPE(ASN1_OBJECT)
33 MAKE_OPENSSL_PTR_TYPE(EVP_PKEY)
34 MAKE_OPENSSL_PTR_TYPE(RSA)
35 MAKE_OPENSSL_PTR_TYPE(X509)
36 MAKE_OPENSSL_PTR_TYPE(BN_CTX)
37
38 typedef std::unique_ptr<BIGNUM, UniquePtrDeleter<BIGNUM, BN_free>> BIGNUM_Ptr;
39
openssl_digest(android::hardware::keymaster::V4_0::Digest digest)40 inline const EVP_MD* openssl_digest(android::hardware::keymaster::V4_0::Digest digest) {
41 switch (digest) {
42 case android::hardware::keymaster::V4_0::Digest::NONE:
43 return nullptr;
44 case android::hardware::keymaster::V4_0::Digest::MD5:
45 return EVP_md5();
46 case android::hardware::keymaster::V4_0::Digest::SHA1:
47 return EVP_sha1();
48 case android::hardware::keymaster::V4_0::Digest::SHA_2_224:
49 return EVP_sha224();
50 case android::hardware::keymaster::V4_0::Digest::SHA_2_256:
51 return EVP_sha256();
52 case android::hardware::keymaster::V4_0::Digest::SHA_2_384:
53 return EVP_sha384();
54 case android::hardware::keymaster::V4_0::Digest::SHA_2_512:
55 return EVP_sha512();
56 }
57 return nullptr;
58 }
59
60 #endif // HARDWARE_INTERFACES_KEYMASTER_4_0_SUPPORT_OPENSSL_UTILS_H_
61