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Diffstat (limited to 'lib/crypto_backend/crypto_backend.h')
| -rw-r--r-- | lib/crypto_backend/crypto_backend.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/lib/crypto_backend/crypto_backend.h b/lib/crypto_backend/crypto_backend.h new file mode 100644 index 0000000..f7f16d8 --- /dev/null +++ b/lib/crypto_backend/crypto_backend.h @@ -0,0 +1,139 @@ +/* + * crypto backend implementation + * + * Copyright (C) 2010-2019 Red Hat, Inc. All rights reserved. + * Copyright (C) 2010-2019 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_H +#define _CRYPTO_BACKEND_H + +#include <stdint.h> +#include <stddef.h> +#include <string.h> + +struct crypt_device; +struct crypt_hash; +struct crypt_hmac; +struct crypt_cipher; +struct crypt_storage; + +int crypt_backend_init(struct crypt_device *ctx); +void crypt_backend_destroy(void); + +#define CRYPT_BACKEND_KERNEL (1 << 0) /* Crypto uses kernel part, for benchmark */ + +uint32_t crypt_backend_flags(void); +const char *crypt_backend_version(void); + +/* HASH */ +int crypt_hash_size(const char *name); +int crypt_hash_init(struct crypt_hash **ctx, const char *name); +int crypt_hash_write(struct crypt_hash *ctx, const char *buffer, size_t length); +int crypt_hash_final(struct crypt_hash *ctx, char *buffer, size_t length); +void crypt_hash_destroy(struct crypt_hash *ctx); + +/* HMAC */ +int crypt_hmac_size(const char *name); +int crypt_hmac_init(struct crypt_hmac **ctx, const char *name, + const void *key, size_t key_length); +int crypt_hmac_write(struct crypt_hmac *ctx, const char *buffer, size_t length); +int crypt_hmac_final(struct crypt_hmac *ctx, char *buffer, size_t length); +void crypt_hmac_destroy(struct crypt_hmac *ctx); + +/* RNG (if fips parameter set, must provide FIPS compliance) */ +enum { CRYPT_RND_NORMAL = 0, CRYPT_RND_KEY = 1, CRYPT_RND_SALT = 2 }; +int crypt_backend_rng(char *buffer, size_t length, int quality, int fips); + +struct crypt_pbkdf_limits { + uint32_t min_iterations, max_iterations; + uint32_t min_memory, max_memory; + uint32_t min_parallel, max_parallel; +}; +int crypt_pbkdf_get_limits(const char *kdf, struct crypt_pbkdf_limits *l); + +/* PBKDF*/ +int crypt_pbkdf(const char *kdf, const char *hash, + 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); +int crypt_pbkdf_perf(const char *kdf, const char *hash, + const char *password, size_t password_size, + const char *salt, size_t salt_size, + size_t volume_key_size, uint32_t time_ms, + uint32_t max_memory_kb, uint32_t parallel_threads, + uint32_t *iterations_out, uint32_t *memory_out, + int (*progress)(uint32_t time_ms, void *usrptr), void *usrptr); + +#if USE_INTERNAL_PBKDF2 +/* 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); +#endif + +/* 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); + +/* CRC32 */ +uint32_t crypt_crc32(uint32_t seed, const unsigned char *buf, size_t len); + +/* ciphers */ +int crypt_cipher_ivsize(const char *name, const char *mode); +int crypt_cipher_wrapped_key(const char *name, const char *mode); +int crypt_cipher_init(struct crypt_cipher **ctx, const char *name, + const char *mode, const void *key, size_t key_length); +void crypt_cipher_destroy(struct crypt_cipher *ctx); +int crypt_cipher_encrypt(struct crypt_cipher *ctx, + const char *in, char *out, size_t length, + const char *iv, size_t iv_length); +int crypt_cipher_decrypt(struct crypt_cipher *ctx, + const char *in, char *out, size_t length, + const char *iv, size_t iv_length); + +/* Check availability of a cipher */ +int crypt_cipher_check(const char *name, const char *mode, + const char *integrity, size_t key_length); + +/* storage encryption wrappers */ +int crypt_storage_init(struct crypt_storage **ctx, uint64_t sector_start, + const char *cipher, const char *cipher_mode, + const void *key, size_t key_length); +void crypt_storage_destroy(struct crypt_storage *ctx); +int crypt_storage_decrypt(struct crypt_storage *ctx, uint64_t sector, + size_t count, char *buffer); +int crypt_storage_encrypt(struct crypt_storage *ctx, uint64_t sector, + size_t count, char *buffer); + +/* Memzero helper (memset on stack can be optimized out) */ +static inline void crypt_backend_memzero(void *s, size_t n) +{ +#ifdef HAVE_EXPLICIT_BZERO + explicit_bzero(s, n); +#else + volatile uint8_t *p = (volatile uint8_t *)s; + while(n--) *p++ = 0; +#endif +} + +#endif /* _CRYPTO_BACKEND_H */ |