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chachapoly.h
Go to the documentation of this file.
/*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
#ifndef MBEDTLS_CHACHAPOLY_H
#define MBEDTLS_CHACHAPOLY_H
#include "mbedtls/private_access.h"
#include "mbedtls/build_info.h"
/* for shared error codes */
#include "mbedtls/poly1305.h"
#define MBEDTLS_ERR_CHACHAPOLY_BAD_STATE -0x0054
#define MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED -0x0056
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
MBEDTLS_CHACHAPOLY_ENCRYPT,
MBEDTLS_CHACHAPOLY_DECRYPT
}
mbedtls_chachapoly_mode_t;
#if !defined(MBEDTLS_CHACHAPOLY_ALT)
#include "mbedtls/chacha20.h"
typedef struct mbedtls_chachapoly_context {
mbedtls_chacha20_context MBEDTLS_PRIVATE(chacha20_ctx);
mbedtls_poly1305_context MBEDTLS_PRIVATE(poly1305_ctx);
uint64_t MBEDTLS_PRIVATE(aad_len);
uint64_t MBEDTLS_PRIVATE(ciphertext_len);
int MBEDTLS_PRIVATE(state);
mbedtls_chachapoly_mode_t MBEDTLS_PRIVATE(mode);
}
mbedtls_chachapoly_context;
#else /* !MBEDTLS_CHACHAPOLY_ALT */
#include "chachapoly_alt.h"
#endif /* !MBEDTLS_CHACHAPOLY_ALT */
void mbedtls_chachapoly_init(mbedtls_chachapoly_context *ctx);
void mbedtls_chachapoly_free(mbedtls_chachapoly_context *ctx);
int mbedtls_chachapoly_setkey(mbedtls_chachapoly_context *ctx,
const unsigned char key[32]);
int mbedtls_chachapoly_starts(mbedtls_chachapoly_context *ctx,
const unsigned char nonce[12],
mbedtls_chachapoly_mode_t mode);
int mbedtls_chachapoly_update_aad(mbedtls_chachapoly_context *ctx,
const unsigned char *aad,
size_t aad_len);
int mbedtls_chachapoly_update(mbedtls_chachapoly_context *ctx,
size_t len,
const unsigned char *input,
unsigned char *output);
int mbedtls_chachapoly_finish(mbedtls_chachapoly_context *ctx,
unsigned char mac[16]);
int mbedtls_chachapoly_encrypt_and_tag(mbedtls_chachapoly_context *ctx,
size_t length,
const unsigned char nonce[12],
const unsigned char *aad,
size_t aad_len,
const unsigned char *input,
unsigned char *output,
unsigned char tag[16]);
int mbedtls_chachapoly_auth_decrypt(mbedtls_chachapoly_context *ctx,
size_t length,
const unsigned char nonce[12],
const unsigned char *aad,
size_t aad_len,
const unsigned char tag[16],
const unsigned char *input,
unsigned char *output);
#if defined(MBEDTLS_SELF_TEST)
int mbedtls_chachapoly_self_test(int verbose);
#endif /* MBEDTLS_SELF_TEST */
#ifdef __cplusplus
}
#endif
#endif /* MBEDTLS_CHACHAPOLY_H */
chacha20.h
This file contains ChaCha20 definitions and functions.
mbedtls_chachapoly_finish
int mbedtls_chachapoly_finish(mbedtls_chachapoly_context *ctx, unsigned char mac[16])
This function finished the ChaCha20-Poly1305 operation and generates the MAC (authentication tag).
mbedtls_chachapoly_context
struct mbedtls_chachapoly_context mbedtls_chachapoly_context
mbedtls_chachapoly_init
void mbedtls_chachapoly_init(mbedtls_chachapoly_context *ctx)
This function initializes the specified ChaCha20-Poly1305 context.
mbedtls_chachapoly_starts
int mbedtls_chachapoly_starts(mbedtls_chachapoly_context *ctx, const unsigned char nonce[12], mbedtls_chachapoly_mode_t mode)
This function starts a ChaCha20-Poly1305 encryption or decryption operation.
mbedtls_chachapoly_setkey
int mbedtls_chachapoly_setkey(mbedtls_chachapoly_context *ctx, const unsigned char key[32])
This function sets the ChaCha20-Poly1305 symmetric encryption key.
mbedtls_chachapoly_update
int mbedtls_chachapoly_update(mbedtls_chachapoly_context *ctx, size_t len, const unsigned char *input, unsigned char *output)
Thus function feeds data to be encrypted or decrypted into an on-going ChaCha20-Poly1305 operation.
mbedtls_chachapoly_free
void mbedtls_chachapoly_free(mbedtls_chachapoly_context *ctx)
This function releases and clears the specified ChaCha20-Poly1305 context.
mbedtls_chachapoly_encrypt_and_tag
int mbedtls_chachapoly_encrypt_and_tag(mbedtls_chachapoly_context *ctx, size_t length, const unsigned char nonce[12], const unsigned char *aad, size_t aad_len, const unsigned char *input, unsigned char *output, unsigned char tag[16])
This function performs a complete ChaCha20-Poly1305 authenticated encryption with the previously-set ...
mbedtls_chachapoly_self_test
int mbedtls_chachapoly_self_test(int verbose)
The ChaCha20-Poly1305 checkup routine.
mbedtls_chachapoly_mode_t
mbedtls_chachapoly_mode_t
Definition chachapoly.h:38
MBEDTLS_CHACHAPOLY_ENCRYPT
@ MBEDTLS_CHACHAPOLY_ENCRYPT
Definition chachapoly.h:39
MBEDTLS_CHACHAPOLY_DECRYPT
@ MBEDTLS_CHACHAPOLY_DECRYPT
Definition chachapoly.h:40
mbedtls_chachapoly_auth_decrypt
int mbedtls_chachapoly_auth_decrypt(mbedtls_chachapoly_context *ctx, size_t length, const unsigned char nonce[12], const unsigned char *aad, size_t aad_len, const unsigned char tag[16], const unsigned char *input, unsigned char *output)
This function performs a complete ChaCha20-Poly1305 authenticated decryption with the previously-set ...
mbedtls_chachapoly_update_aad
int mbedtls_chachapoly_update_aad(mbedtls_chachapoly_context *ctx, const unsigned char *aad, size_t aad_len)
This function feeds additional data to be authenticated into an ongoing ChaCha20-Poly1305 operation.
chachapoly_alt.h
build_info.h
Build-time configuration info.
poly1305.h
This file contains Poly1305 definitions and functions.
private_access.h
Macro wrapper for struct's members.
MBEDTLS_PRIVATE
#define MBEDTLS_PRIVATE(member)
Definition private_access.h:15
mbedtls_chacha20_context
Definition chacha20.h:38
mbedtls_chachapoly_context
Definition chachapoly.h:48
mbedtls_poly1305_context
Definition poly1305.h:38