100 lines
3.6 KiB
C++
100 lines
3.6 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/bn.h>
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#include <openssl/ec.h>
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#include <openssl/engine.h>
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#include <openssl/evp.h>
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#include <openssl/rsa.h>
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#include <openssl/x509.h>
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#include <keymaster/UniquePtr.h>
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#include <hardware/keymaster_defs.h>
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namespace keymaster {
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struct KeymasterKeyBlob;
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class EvpMdCtxCleaner {
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public:
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explicit EvpMdCtxCleaner(EVP_MD_CTX* ctx) : ctx_(ctx) {}
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~EvpMdCtxCleaner() { EVP_MD_CTX_cleanup(ctx_); }
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private:
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EVP_MD_CTX* ctx_;
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};
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template <typename T, void (*FreeFunc)(T*)> struct OpenSslObjectDeleter {
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void operator()(T* p) { FreeFunc(p); }
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};
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#define DEFINE_OPENSSL_OBJECT_POINTER(name) \
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typedef OpenSslObjectDeleter<name, name##_free> name##_Delete; \
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typedef UniquePtr<name, name##_Delete> name##_Ptr;
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DEFINE_OPENSSL_OBJECT_POINTER(ASN1_BIT_STRING)
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DEFINE_OPENSSL_OBJECT_POINTER(ASN1_INTEGER)
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DEFINE_OPENSSL_OBJECT_POINTER(ASN1_OBJECT)
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DEFINE_OPENSSL_OBJECT_POINTER(ASN1_OCTET_STRING)
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DEFINE_OPENSSL_OBJECT_POINTER(ASN1_TIME)
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DEFINE_OPENSSL_OBJECT_POINTER(BN_CTX)
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DEFINE_OPENSSL_OBJECT_POINTER(EC_GROUP)
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DEFINE_OPENSSL_OBJECT_POINTER(EC_KEY)
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DEFINE_OPENSSL_OBJECT_POINTER(EC_POINT)
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DEFINE_OPENSSL_OBJECT_POINTER(ENGINE)
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DEFINE_OPENSSL_OBJECT_POINTER(EVP_PKEY)
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DEFINE_OPENSSL_OBJECT_POINTER(PKCS8_PRIV_KEY_INFO)
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DEFINE_OPENSSL_OBJECT_POINTER(RSA)
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DEFINE_OPENSSL_OBJECT_POINTER(X509)
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DEFINE_OPENSSL_OBJECT_POINTER(X509_EXTENSION)
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DEFINE_OPENSSL_OBJECT_POINTER(X509_NAME)
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typedef OpenSslObjectDeleter<BIGNUM, BN_free> BIGNUM_Delete;
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typedef UniquePtr<BIGNUM, BIGNUM_Delete> BIGNUM_Ptr;
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keymaster_error_t ec_get_group_size(const EC_GROUP* group, size_t* key_size_bits);
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EC_GROUP* ec_get_group(keymaster_ec_curve_t curve);
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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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keymaster_error_t convert_pkcs8_blob_to_evp(const uint8_t* key_data, size_t key_length,
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keymaster_algorithm_t expected_algorithm,
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UniquePtr<EVP_PKEY, EVP_PKEY_Delete>* pkey);
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keymaster_error_t KeyMaterialToEvpKey(keymaster_key_format_t key_format,
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const KeymasterKeyBlob& key_material,
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keymaster_algorithm_t expected_algorithm,
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UniquePtr<EVP_PKEY, EVP_PKEY_Delete>* evp_pkey);
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keymaster_error_t EvpKeyToKeyMaterial(const EVP_PKEY* evp_pkey, KeymasterKeyBlob* key_blob);
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size_t ec_group_size_bits(EC_KEY* ec_key);
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} // namespace keymaster
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#endif // SYSTEM_KEYMASTER_OPENSSL_UTILS_H_
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