/**
 * \file src/decryption/rc4_cryption.cpp
 * MegEngine is Licensed under the Apache License, Version 2.0 (the "License")
 *
 * Copyright (c) 2014-2021 Megvii Inc. All rights reserved.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT ARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 */

#include "rc4_cryption.h"
#include "rc4/rc4_cryption_impl.h"

#include <vector>

using namespace lite;

std::vector<uint8_t> RC4::decrypt_model(const void* model_mem, size_t size,
                                        const std::vector<uint8_t>& key) {
    RC4Impl rc4_impl(model_mem, size, key);
    rc4_impl.init_rc4_state();
    return rc4_impl.decrypt_model();
}

std::vector<uint8_t> RC4::encrypt_model(const void* model_mem, size_t size,
                                        const std::vector<uint8_t>& key) {
    RC4Impl rc4_impl(model_mem, size, key);
    return rc4_impl.encrypt_model();
}

std::vector<uint8_t> RC4::get_decrypt_key() {
    std::vector<uint8_t> keys(128, 0);
    uint64_t* data = reinterpret_cast<uint64_t*>(keys.data());
    data[0] = rc4::key_gen_hash_key();
    data[1] = rc4::key_gen_enc_key();
    return keys;
};

std::vector<uint8_t> SimpleFastRC4::decrypt_model(
        const void* model_mem, size_t size, const std::vector<uint8_t>& key) {
    SimpleFastRC4Impl simple_fast_rc4_impl(model_mem, size, key);
    simple_fast_rc4_impl.init_sfrc4_state();
    return simple_fast_rc4_impl.decrypt_model();
}
std::vector<uint8_t> SimpleFastRC4::encrypt_model(
        const void* model_mem, size_t size, const std::vector<uint8_t>& key) {
    SimpleFastRC4Impl simple_fast_rc4_impl(model_mem, size, key);
    return simple_fast_rc4_impl.encrypt_model();
}

std::vector<uint8_t> SimpleFastRC4::get_decrypt_key() {
    std::vector<uint8_t> keys(128, 0);
    uint64_t* data = reinterpret_cast<uint64_t*>(keys.data());
    data[0] = rc4::key_gen_hash_key();
    data[1] = rc4::key_gen_enc_key();
    return keys;
}

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