summaryrefslogtreecommitdiffstats
path: root/lib/crypto_backend/crypto_backend.h
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--lib/crypto_backend/crypto_backend.h161
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 */