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 #include <openssl/evp.h>
22 #include <openssl/x509.h>
23
24 template <typename T, void (*F)(T*)>
25 struct UniquePtrDeleter {
operatorUniquePtrDeleter26 void operator()(T* p) const { F(p); }
27 };
28
29 typedef UniquePtrDeleter<EVP_PKEY, EVP_PKEY_free> EVP_PKEY_Delete;
30
31 #define MAKE_OPENSSL_PTR_TYPE(type) \
32 typedef std::unique_ptr<type, UniquePtrDeleter<type, type##_free>> type##_Ptr;
33
34 MAKE_OPENSSL_PTR_TYPE(ASN1_OBJECT)
35 MAKE_OPENSSL_PTR_TYPE(EVP_PKEY)
36 MAKE_OPENSSL_PTR_TYPE(RSA)
37 MAKE_OPENSSL_PTR_TYPE(X509)
38 MAKE_OPENSSL_PTR_TYPE(BN_CTX)
39
40 typedef std::unique_ptr<BIGNUM, UniquePtrDeleter<BIGNUM, BN_free>> BIGNUM_Ptr;
41
openssl_digest(android::hardware::keymaster::V4_0::Digest digest)42 inline const EVP_MD* openssl_digest(android::hardware::keymaster::V4_0::Digest digest) {
43 switch (digest) {
44 case android::hardware::keymaster::V4_0::Digest::NONE:
45 return nullptr;
46 case android::hardware::keymaster::V4_0::Digest::MD5:
47 return EVP_md5();
48 case android::hardware::keymaster::V4_0::Digest::SHA1:
49 return EVP_sha1();
50 case android::hardware::keymaster::V4_0::Digest::SHA_2_224:
51 return EVP_sha224();
52 case android::hardware::keymaster::V4_0::Digest::SHA_2_256:
53 return EVP_sha256();
54 case android::hardware::keymaster::V4_0::Digest::SHA_2_384:
55 return EVP_sha384();
56 case android::hardware::keymaster::V4_0::Digest::SHA_2_512:
57 return EVP_sha512();
58 }
59 return nullptr;
60 }
61
62 #endif // HARDWARE_INTERFACES_KEYMASTER_4_0_SUPPORT_OPENSSL_UTILS_H_
63