1/*
2 * Copyright 2016 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
17template <typename T, void (*F)(T*)> struct UniquePtrDeleter {
18    void operator()(T* p) const { F(p); }
19};
20
21typedef UniquePtrDeleter<EVP_PKEY, EVP_PKEY_free> EVP_PKEY_Delete;
22
23#define MAKE_OPENSSL_PTR_TYPE(type)                                                                \
24    typedef std::unique_ptr<type, UniquePtrDeleter<type, type##_free>> type##_Ptr;
25
26MAKE_OPENSSL_PTR_TYPE(ASN1_OBJECT)
27MAKE_OPENSSL_PTR_TYPE(EVP_PKEY)
28MAKE_OPENSSL_PTR_TYPE(RSA)
29MAKE_OPENSSL_PTR_TYPE(X509)
30MAKE_OPENSSL_PTR_TYPE(BN_CTX)
31
32typedef std::unique_ptr<BIGNUM, UniquePtrDeleter<BIGNUM, BN_free>> BIGNUM_Ptr;
33
34inline const EVP_MD* openssl_digest(android::hardware::keymaster::V3_0::Digest digest) {
35    switch (digest) {
36    case android::hardware::keymaster::V3_0::Digest::NONE:
37        return nullptr;
38    case android::hardware::keymaster::V3_0::Digest::MD5:
39        return EVP_md5();
40    case android::hardware::keymaster::V3_0::Digest::SHA1:
41        return EVP_sha1();
42    case android::hardware::keymaster::V3_0::Digest::SHA_2_224:
43        return EVP_sha224();
44    case android::hardware::keymaster::V3_0::Digest::SHA_2_256:
45        return EVP_sha256();
46    case android::hardware::keymaster::V3_0::Digest::SHA_2_384:
47        return EVP_sha384();
48    case android::hardware::keymaster::V3_0::Digest::SHA_2_512:
49        return EVP_sha512();
50    }
51    return nullptr;
52}
53