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