48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
/*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SYSTEM_KEYMASTER_OPENSSL_UTILS_H_
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#define SYSTEM_KEYMASTER_OPENSSL_UTILS_H_
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#include <openssl/evp.h>
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#include <openssl/bn.h>
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struct EVP_PKEY_Delete {
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void operator()(EVP_PKEY* p) const { EVP_PKEY_free(p); }
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};
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struct BIGNUM_Delete {
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void operator()(BIGNUM* p) const { BN_free(p); }
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};
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/**
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* Many OpenSSL APIs take ownership of an argument on success but don't free the argument on
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* failure. This means we need to tell our scoped pointers when we've transferred ownership, without
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* triggering a warning by not using the result of release().
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*/
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template <typename T, typename Delete_T>
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inline void release_because_ownership_transferred(UniquePtr<T, Delete_T>& p) {
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T* val __attribute__((unused)) = p.release();
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}
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inline void convert_bn_to_blob(BIGNUM* bn, keymaster_blob_t* blob) {
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blob->data_length = BN_num_bytes(bn);
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blob->data = new uint8_t[blob->data_length];
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BN_bn2bin(bn, const_cast<uint8_t*>(blob->data));
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}
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#endif // SYSTEM_KEYMASTER_OPENSSL_UTILS_H_
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