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Diffstat (limited to '')
-rw-r--r-- | lib/crypto_backend/crypto_backend_internal.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/lib/crypto_backend/crypto_backend_internal.h b/lib/crypto_backend/crypto_backend_internal.h new file mode 100644 index 0000000..9b1cc69 --- /dev/null +++ b/lib/crypto_backend/crypto_backend_internal.h @@ -0,0 +1,75 @@ +/* + * 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 */ |