chacha20.h File Reference

This file contains ChaCha20 definitions and functions. More...

#include "mbedtls/config.h"
#include <stdint.h>
#include <stddef.h>

Go to the source code of this file.

Data Structures
struct	mbedtls_chacha20_context

Macros
#define	MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA   -0x0051
	Invalid input parameter(s).
#define	MBEDTLS_ERR_CHACHA20_FEATURE_UNAVAILABLE   -0x0053
	Feature not available.
#define	MBEDTLS_ERR_CHACHA20_HW_ACCEL_FAILED   -0x0055
	Chacha20 hardware accelerator failed.

Functions
void	mbedtls_chacha20_init (mbedtls_chacha20_context *ctx)
	This function initializes the specified ChaCha20 context.
void	mbedtls_chacha20_free (mbedtls_chacha20_context *ctx)
	This function releases and clears the specified ChaCha20 context.
int	mbedtls_chacha20_setkey (mbedtls_chacha20_context *ctx, const unsigned char key[32])
	This function sets the encryption/decryption key.
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_update (mbedtls_chacha20_context *ctx, size_t size, const unsigned char *input, unsigned char *output)
	This function encrypts or decrypts data.
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.

Detailed Description

This file contains ChaCha20 definitions and functions.

     ChaCha20 is a stream cipher that can encrypt and decrypt
     information. ChaCha was created by Daniel Bernstein as a variant of
     its Salsa cipher https://cr.yp.to/chacha/chacha-20080128.pdf
     ChaCha20 is the variant with 20 rounds, that was also standardized
     in RFC 7539.

Author

Daniel King damak.nosp@m.i.gh.nosp@m.@gmai.nosp@m.l.co.nosp@m.m

Definition in file chacha20.h.