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 { 24 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 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
