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/*
* Copyright 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef HARDWARE_INTERFACES_KEYMASTER_4_0_SUPPORT_OPENSSL_UTILS_H_
#define HARDWARE_INTERFACES_KEYMASTER_4_0_SUPPORT_OPENSSL_UTILS_H_
#include <android/hardware/keymaster/4.0/types.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
template <typename T, void (*F)(T*)>
struct UniquePtrDeleter {
void operator()(T* p) const { F(p); }
};
typedef UniquePtrDeleter<EVP_PKEY, EVP_PKEY_free> EVP_PKEY_Delete;
#define MAKE_OPENSSL_PTR_TYPE(type) \
typedef std::unique_ptr<type, UniquePtrDeleter<type, type##_free>> type##_Ptr;
MAKE_OPENSSL_PTR_TYPE(ASN1_OBJECT)
MAKE_OPENSSL_PTR_TYPE(EVP_PKEY)
MAKE_OPENSSL_PTR_TYPE(RSA)
MAKE_OPENSSL_PTR_TYPE(X509)
MAKE_OPENSSL_PTR_TYPE(BN_CTX)
typedef std::unique_ptr<BIGNUM, UniquePtrDeleter<BIGNUM, BN_free>> BIGNUM_Ptr;
inline const EVP_MD* openssl_digest(android::hardware::keymaster::V4_0::Digest digest) {
switch (digest) {
case android::hardware::keymaster::V4_0::Digest::NONE:
return nullptr;
case android::hardware::keymaster::V4_0::Digest::MD5:
return EVP_md5();
case android::hardware::keymaster::V4_0::Digest::SHA1:
return EVP_sha1();
case android::hardware::keymaster::V4_0::Digest::SHA_2_224:
return EVP_sha224();
case android::hardware::keymaster::V4_0::Digest::SHA_2_256:
return EVP_sha256();
case android::hardware::keymaster::V4_0::Digest::SHA_2_384:
return EVP_sha384();
case android::hardware::keymaster::V4_0::Digest::SHA_2_512:
return EVP_sha512();
}
return nullptr;
}
#endif // HARDWARE_INTERFACES_KEYMASTER_4_0_SUPPORT_OPENSSL_UTILS_H_
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