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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 08:06:26 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 08:06:26 +0000 |
commit | 1660d4b7a65d9ad2ce0deaa19d35579ca4084ac5 (patch) | |
tree | 6cf8220b628ebd2ccfc1375dd6516c6996e9abcc /lib/crypto_backend/crypto_backend.h | |
parent | Initial commit. (diff) | |
download | cryptsetup-upstream.tar.xz cryptsetup-upstream.zip |
Adding upstream version 2:2.6.1.upstream/2%2.6.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lib/crypto_backend/crypto_backend.h | 161 |
1 files changed, 161 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..88562e9 --- /dev/null +++ b/lib/crypto_backend/crypto_backend.h @@ -0,0 +1,161 @@ +/* + * 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_H +#define _CRYPTO_BACKEND_H + +#include <assert.h> +#include <stdint.h> +#include <stdbool.h> +#include <stddef.h> +#include <string.h> +#ifdef HAVE_UCHAR_H +#include <uchar.h> +#else +#define char32_t uint32_t +#define char16_t uint16_t +#endif + +struct crypt_hash; +struct crypt_hmac; +struct crypt_cipher; +struct crypt_storage; + +int crypt_backend_init(bool fips); +void crypt_backend_destroy(void); + +#define CRYPT_BACKEND_KERNEL (1 << 0) /* Crypto uses kernel part, for benchmark */ +#define CRYPT_BACKEND_PBKDF2_INT (1 << 1) /* Iteration in PBKDF2 is signed int and can overflow */ + +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); + + +/* PBKDF*/ +struct crypt_pbkdf_limits { + uint32_t min_iterations, max_iterations; + uint32_t min_memory, max_memory, min_bench_memory; + uint32_t min_parallel, max_parallel; +}; + +int crypt_pbkdf_get_limits(const char *kdf, struct crypt_pbkdf_limits *l); +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); + +/* CRC32 */ +uint32_t crypt_crc32(uint32_t seed, const unsigned char *buf, size_t len); +uint32_t crypt_crc32c(uint32_t seed, const unsigned char *buf, size_t len); + +/* Base64 */ +int crypt_base64_encode(char **out, size_t *out_length, const char *in, size_t in_length); +int crypt_base64_decode(char **out, size_t *out_length, const char *in, size_t in_length); + +/* UTF8/16 */ +int crypt_utf16_to_utf8(char **out, const char16_t *s, size_t length /* bytes! */); +int crypt_utf8_to_utf16(char16_t **out, const char *s, size_t length); + +/* Block 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); +bool crypt_cipher_kernel_only(struct crypt_cipher *ctx); + +/* Benchmark of kernel cipher performance */ +int crypt_cipher_perf_kernel(const char *name, const char *mode, char *buffer, size_t buffer_size, + const char *key, size_t key_size, const char *iv, size_t iv_size, + double *encryption_mbs, double *decryption_mbs); + +/* Check availability of a cipher (in kernel only) */ +int crypt_cipher_check_kernel(const char *name, const char *mode, + const char *integrity, size_t key_length); + +/* Storage encryption wrappers */ +int crypt_storage_init(struct crypt_storage **ctx, size_t sector_size, + const char *cipher, const char *cipher_mode, + const void *key, size_t key_length, bool large_iv); +void crypt_storage_destroy(struct crypt_storage *ctx); +int crypt_storage_decrypt(struct crypt_storage *ctx, uint64_t iv_offset, + uint64_t length, char *buffer); +int crypt_storage_encrypt(struct crypt_storage *ctx, uint64_t iv_offset, + uint64_t length, char *buffer); + +bool crypt_storage_kernel_only(struct crypt_storage *ctx); + +/* Temporary Bitlk helper */ +int crypt_bitlk_decrypt_key(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); + +/* 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 +} + +/* Memcmp helper (memcmp in constant time) */ +int crypt_backend_memeq(const void *m1, const void *m2, size_t n); + +/* crypto backend running in FIPS mode */ +bool crypt_fips_mode(void); + +#endif /* _CRYPTO_BACKEND_H */ |