/usr/include/gnutls/crypto.h is in libgnutls28-dev 3.2.11-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2008-2012 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS 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 library 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 program. If not, see <http://www.gnu.org/licenses/>
*
*/
#ifndef GNUTLS_CRYPTO_H
#define GNUTLS_CRYPTO_H
/* *INDENT-OFF* */
#ifdef __cplusplus
extern "C" {
#endif
/* *INDENT-ON* */
typedef struct api_cipher_hd_st *gnutls_cipher_hd_t;
int gnutls_cipher_init(gnutls_cipher_hd_t * handle,
gnutls_cipher_algorithm_t cipher,
const gnutls_datum_t * key,
const gnutls_datum_t * iv);
int gnutls_cipher_encrypt(const gnutls_cipher_hd_t handle,
void *text, size_t textlen);
int gnutls_cipher_decrypt(const gnutls_cipher_hd_t handle,
void *ciphertext, size_t ciphertextlen);
int gnutls_cipher_decrypt2(gnutls_cipher_hd_t handle,
const void *ciphertext,
size_t ciphertextlen, void *text,
size_t textlen);
int gnutls_cipher_encrypt2(gnutls_cipher_hd_t handle,
const void *text, size_t textlen,
void *ciphertext, size_t ciphertextlen);
void gnutls_cipher_set_iv(gnutls_cipher_hd_t handle, void *iv,
size_t ivlen);
int gnutls_cipher_tag(gnutls_cipher_hd_t handle, void *tag,
size_t tag_size);
int gnutls_cipher_add_auth(gnutls_cipher_hd_t handle,
const void *text, size_t text_size);
void gnutls_cipher_deinit(gnutls_cipher_hd_t handle);
int gnutls_cipher_get_block_size(gnutls_cipher_algorithm_t algorithm);
int gnutls_cipher_get_iv_size(gnutls_cipher_algorithm_t algorithm);
int gnutls_cipher_get_tag_size(gnutls_cipher_algorithm_t algorithm);
typedef struct hash_hd_st *gnutls_hash_hd_t;
typedef struct hmac_hd_st *gnutls_hmac_hd_t;
size_t gnutls_mac_get_nonce_size(gnutls_mac_algorithm_t algorithm);
int gnutls_hmac_init(gnutls_hmac_hd_t * dig,
gnutls_mac_algorithm_t algorithm,
const void *key, size_t keylen);
void gnutls_hmac_set_nonce(gnutls_hmac_hd_t handle,
const void *nonce, size_t nonce_len);
int gnutls_hmac(gnutls_hmac_hd_t handle, const void *text, size_t textlen);
void gnutls_hmac_output(gnutls_hmac_hd_t handle, void *digest);
void gnutls_hmac_deinit(gnutls_hmac_hd_t handle, void *digest);
int gnutls_hmac_get_len(gnutls_mac_algorithm_t algorithm);
int gnutls_hmac_fast(gnutls_mac_algorithm_t algorithm,
const void *key, size_t keylen,
const void *text, size_t textlen, void *digest);
int gnutls_hash_init(gnutls_hash_hd_t * dig,
gnutls_digest_algorithm_t algorithm);
int gnutls_hash(gnutls_hash_hd_t handle, const void *text, size_t textlen);
void gnutls_hash_output(gnutls_hash_hd_t handle, void *digest);
void gnutls_hash_deinit(gnutls_hash_hd_t handle, void *digest);
int gnutls_hash_get_len(gnutls_digest_algorithm_t algorithm);
int gnutls_hash_fast(gnutls_digest_algorithm_t algorithm,
const void *text, size_t textlen, void *digest);
/* register ciphers */
/**
* gnutls_rnd_level_t:
* @GNUTLS_RND_NONCE: Non-predictable random number. Fatal in parts
* of session if broken, i.e., vulnerable to statistical analysis.
* @GNUTLS_RND_RANDOM: Pseudo-random cryptographic random number.
* Fatal in session if broken.
* @GNUTLS_RND_KEY: Fatal in many sessions if broken.
*
* Enumeration of random quality levels.
*/
typedef enum gnutls_rnd_level {
GNUTLS_RND_NONCE = 0,
GNUTLS_RND_RANDOM = 1,
GNUTLS_RND_KEY = 2
} gnutls_rnd_level_t;
int gnutls_rnd(gnutls_rnd_level_t level, void *data, size_t len);
void gnutls_rnd_refresh(void);
/* *INDENT-OFF* */
#ifdef __cplusplus
}
#endif
/* *INDENT-ON* */
#endif
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