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/*
* 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_ECDSA_OPERATION_H_
#define SYSTEM_KEYMASTER_ECDSA_OPERATION_H_
#include <openssl/ec.h>
#include <openssl/evp.h>
#include <UniquePtr.h>
#include "operation.h"
namespace keymaster {
class EcdsaOperation : public Operation {
public:
EcdsaOperation(keymaster_purpose_t purpose, keymaster_digest_t digest, EVP_PKEY* key)
: Operation(purpose), digest_(digest), ecdsa_key_(key) {
EVP_MD_CTX_init(&digest_ctx_);
}
~EcdsaOperation();
keymaster_error_t Abort() override { return KM_ERROR_OK; }
protected:
keymaster_error_t StoreData(const Buffer& input, size_t* input_consumed);
keymaster_error_t InitDigest();
keymaster_digest_t digest_;
const EVP_MD* digest_algorithm_;
EVP_PKEY* ecdsa_key_;
EVP_MD_CTX digest_ctx_;
Buffer data_;
};
class EcdsaSignOperation : public EcdsaOperation {
public:
EcdsaSignOperation(keymaster_digest_t digest, EVP_PKEY* key)
: EcdsaOperation(KM_PURPOSE_SIGN, digest, key) {}
keymaster_error_t Begin(const AuthorizationSet& input_params,
AuthorizationSet* output_params) override;
keymaster_error_t Update(const AuthorizationSet& additional_params, const Buffer& input,
AuthorizationSet* output_params, Buffer* output,
size_t* input_consumed) override;
keymaster_error_t Finish(const AuthorizationSet& additional_params, const Buffer& signature,
AuthorizationSet* output_params, Buffer* output) override;
};
class EcdsaVerifyOperation : public EcdsaOperation {
public:
EcdsaVerifyOperation(keymaster_digest_t digest, EVP_PKEY* key)
: EcdsaOperation(KM_PURPOSE_VERIFY, digest, key) {}
keymaster_error_t Begin(const AuthorizationSet& input_params,
AuthorizationSet* output_params) override;
keymaster_error_t Update(const AuthorizationSet& additional_params, const Buffer& input,
AuthorizationSet* output_params, Buffer* output,
size_t* input_consumed) override;
keymaster_error_t Finish(const AuthorizationSet& additional_params, const Buffer& signature,
AuthorizationSet* output_params, Buffer* output) override;
};
class EcdsaOperationFactory : public OperationFactory {
private:
KeyType registry_key() const override { return KeyType(KM_ALGORITHM_EC, purpose()); }
Operation* CreateOperation(const Key& key, const AuthorizationSet& begin_params,
keymaster_error_t* error) override;
const keymaster_digest_t* SupportedDigests(size_t* digest_count) const override;
virtual keymaster_purpose_t purpose() const = 0;
virtual Operation* InstantiateOperation(keymaster_digest_t digest, EVP_PKEY* key) = 0;
};
class EcdsaSignOperationFactory : public EcdsaOperationFactory {
private:
keymaster_purpose_t purpose() const override { return KM_PURPOSE_SIGN; }
Operation* InstantiateOperation(keymaster_digest_t digest, EVP_PKEY* key) {
return new (std::nothrow) EcdsaSignOperation(digest, key);
}
};
class EcdsaVerifyOperationFactory : public EcdsaOperationFactory {
public:
keymaster_purpose_t purpose() const override { return KM_PURPOSE_VERIFY; }
Operation* InstantiateOperation(keymaster_digest_t digest, EVP_PKEY* key) {
return new (std::nothrow) EcdsaVerifyOperation(digest, key);
}
};
} // namespace keymaster
#endif // SYSTEM_KEYMASTER_ECDSA_OPERATION_H_
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