Mbed TLS v3.5.0
chacha20.h
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1
15/*
16 * Copyright The Mbed TLS Contributors
17 * SPDX-License-Identifier: Apache-2.0
18 *
19 * Licensed under the Apache License, Version 2.0 (the "License"); you may
20 * not use this file except in compliance with the License.
21 * You may obtain a copy of the License at
22 *
23 * http://www.apache.org/licenses/LICENSE-2.0
24 *
25 * Unless required by applicable law or agreed to in writing, software
26 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
27 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
28 * See the License for the specific language governing permissions and
29 * limitations under the License.
30 */
31
32#ifndef MBEDTLS_CHACHA20_H
33#define MBEDTLS_CHACHA20_H
35
36#include "mbedtls/build_info.h"
37
38#include <stdint.h>
39#include <stddef.h>
40
42#define MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA -0x0051
43
44#ifdef __cplusplus
45extern "C" {
46#endif
47
48#if !defined(MBEDTLS_CHACHA20_ALT)
49
51 uint32_t MBEDTLS_PRIVATE(state)[16];
52 uint8_t MBEDTLS_PRIVATE(keystream8)[64];
53 size_t MBEDTLS_PRIVATE(keystream_bytes_used);
54}
56
57#else /* MBEDTLS_CHACHA20_ALT */
58#include "chacha20_alt.h"
59#endif /* MBEDTLS_CHACHA20_ALT */
60
77
88
106 const unsigned char key[32]);
107
128 const unsigned char nonce[12],
129 uint32_t counter);
130
161 size_t size,
162 const unsigned char *input,
163 unsigned char *output);
164
193int mbedtls_chacha20_crypt(const unsigned char key[32],
194 const unsigned char nonce[12],
195 uint32_t counter,
196 size_t size,
197 const unsigned char *input,
198 unsigned char *output);
199
200#if defined(MBEDTLS_SELF_TEST)
208#endif /* MBEDTLS_SELF_TEST */
209
210#ifdef __cplusplus
211}
212#endif
213
214#endif /* MBEDTLS_CHACHA20_H */
void mbedtls_chacha20_free(mbedtls_chacha20_context *ctx)
This function releases and clears the specified ChaCha20 context.
int mbedtls_chacha20_crypt(const unsigned char key[32], const unsigned char nonce[12], uint32_t counter, size_t size, const unsigned char *input, unsigned char *output)
This function encrypts or decrypts data with ChaCha20 and the given key and nonce.
int mbedtls_chacha20_setkey(mbedtls_chacha20_context *ctx, const unsigned char key[32])
This function sets the encryption/decryption key.
void mbedtls_chacha20_init(mbedtls_chacha20_context *ctx)
This function initializes the specified ChaCha20 context.
int mbedtls_chacha20_starts(mbedtls_chacha20_context *ctx, const unsigned char nonce[12], uint32_t counter)
This function sets the nonce and initial counter value.
int mbedtls_chacha20_self_test(int verbose)
The ChaCha20 checkup routine.
struct mbedtls_chacha20_context mbedtls_chacha20_context
int mbedtls_chacha20_update(mbedtls_chacha20_context *ctx, size_t size, const unsigned char *input, unsigned char *output)
This function encrypts or decrypts data.
Build-time configuration info.
Macro wrapper for struct's members.
#define MBEDTLS_PRIVATE(member)