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/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* Contact: Krzysztof Jackiewicz <k.jackiewicz@samsung.com>
*
* 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
*/
/**
* @file encrypt_simple.c
* @brief Simple Encrypt API example.
*/
//! [Simple Encrypt API example]
#include <stdio.h>
#include <yaca_crypto.h>
#include <yaca_simple.h>
#include <yaca_encrypt.h>
#include <yaca_key.h>
#include <yaca_error.h>
/* include helpers functions and definitions */
#include "misc.h"
int main()
{
int ret;
yaca_key_h key = YACA_KEY_NULL;
yaca_key_h iv = YACA_KEY_NULL;
size_t iv_bit_len;
char *encrypted = NULL;
char *decrypted = NULL;
size_t encrypted_len;
size_t decrypted_len;
ret = yaca_initialize();
if (ret != YACA_ERROR_NONE)
goto exit;
printf("Plain data (16 of %zu bytes): %.16s\n", INPUT_DATA_SIZE, INPUT_DATA);
/* Key generation */
ret = yaca_key_derive_pbkdf2("foo bar", "123456789", 10, 1000,
YACA_DIGEST_SHA256, YACA_KEY_LENGTH_256BIT, &key);
if (ret != YACA_ERROR_NONE)
goto exit;
/* IV generation */
ret = yaca_encrypt_get_iv_bit_length(YACA_ENCRYPT_AES, YACA_BCM_CTR, YACA_KEY_LENGTH_256BIT,
&iv_bit_len);
if (ret != YACA_ERROR_NONE)
goto exit;
if (iv_bit_len > 0) {
ret = yaca_key_generate(YACA_KEY_TYPE_IV, iv_bit_len, &iv);
if (ret != YACA_ERROR_NONE)
goto exit;
}
/* Encryption */
{
ret = yaca_simple_encrypt(YACA_ENCRYPT_AES, YACA_BCM_CTR, key, iv,
INPUT_DATA, INPUT_DATA_SIZE, &encrypted, &encrypted_len);
if (ret != YACA_ERROR_NONE)
goto exit;
/* display encrypted data in hexadecimal format */
dump_hex(encrypted, 16, "Encrypted data (16 of %zu bytes): ", encrypted_len);
}
/* Decryption */
{
ret = yaca_simple_decrypt(YACA_ENCRYPT_AES, YACA_BCM_CTR, key, iv,
encrypted, encrypted_len, &decrypted, &decrypted_len);
if (ret != YACA_ERROR_NONE)
goto exit;
printf("Decrypted data (16 of %zu bytes): %.16s\n\n", decrypted_len, decrypted);
}
exit:
yaca_free(encrypted);
yaca_free(decrypted);
yaca_key_destroy(iv);
yaca_key_destroy(key);
yaca_cleanup();
return ret;
}
//! [Simple Encrypt API example]
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