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