| /* |
| * Copyright 2014 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 SYSTEM_KEYMASTER_OPENSSL_UTILS_H_ |
| #define SYSTEM_KEYMASTER_OPENSSL_UTILS_H_ |
| |
| #include <openssl/evp.h> |
| #include <openssl/bn.h> |
| |
| struct EVP_PKEY_Delete { |
| void operator()(EVP_PKEY* p) const { EVP_PKEY_free(p); } |
| }; |
| |
| struct BIGNUM_Delete { |
| void operator()(BIGNUM* p) const { BN_free(p); } |
| }; |
| |
| /** |
| * Many OpenSSL APIs take ownership of an argument on success but don't free the argument on |
| * failure. This means we need to tell our scoped pointers when we've transferred ownership, without |
| * triggering a warning by not using the result of release(). |
| */ |
| template <typename T, typename Delete_T> |
| inline void release_because_ownership_transferred(UniquePtr<T, Delete_T>& p) { |
| T* val __attribute__((unused)) = p.release(); |
| } |
| |
| inline void convert_bn_to_blob(BIGNUM* bn, keymaster_blob_t* blob) { |
| blob->data_length = BN_num_bytes(bn); |
| blob->data = new uint8_t[blob->data_length]; |
| BN_bn2bin(bn, const_cast<uint8_t*>(blob->data)); |
| } |
| |
| #endif // SYSTEM_KEYMASTER_OPENSSL_UTILS_H_ |