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/*
* crypto backend implementation
*
* Copyright (C) 2010-2023 Red Hat, Inc. All rights reserved.
* Copyright (C) 2010-2023 Milan Broz
*
* This file is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef _CRYPTO_BACKEND_INTERNAL_H
#define _CRYPTO_BACKEND_INTERNAL_H
#include "crypto_backend.h"
/* internal PBKDF2 implementation */
int pkcs5_pbkdf2(const char *hash,
const char *P, size_t Plen,
const char *S, size_t Slen,
unsigned int c,
unsigned int dkLen, char *DK,
unsigned int hash_block_size);
/* Argon2 implementation wrapper */
int argon2(const char *type, const char *password, size_t password_length,
const char *salt, size_t salt_length,
char *key, size_t key_length,
uint32_t iterations, uint32_t memory, uint32_t parallel);
/* Block ciphers: fallback to kernel crypto API */
struct crypt_cipher_kernel {
int tfmfd;
int opfd;
};
int crypt_cipher_init_kernel(struct crypt_cipher_kernel *ctx, const char *name,
const char *mode, const void *key, size_t key_length);
int crypt_cipher_encrypt_kernel(struct crypt_cipher_kernel *ctx,
const char *in, char *out, size_t length,
const char *iv, size_t iv_length);
int crypt_cipher_decrypt_kernel(struct crypt_cipher_kernel *ctx,
const char *in, char *out, size_t length,
const char *iv, size_t iv_length);
void crypt_cipher_destroy_kernel(struct crypt_cipher_kernel *ctx);
int crypt_bitlk_decrypt_key_kernel(const void *key, size_t key_length,
const char *in, char *out, size_t length,
const char *iv, size_t iv_length,
const char *tag, size_t tag_length);
/* Internal implementation for constant time memory comparison */
static inline int crypt_internal_memeq(const void *m1, const void *m2, size_t n)
{
const unsigned char *_m1 = (const unsigned char *) m1;
const unsigned char *_m2 = (const unsigned char *) m2;
unsigned char result = 0;
size_t i;
for (i = 0; i < n; i++)
result |= _m1[i] ^ _m2[i];
return result;
}
#endif /* _CRYPTO_BACKEND_INTERNAL_H */
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