107 lines
3.7 KiB
C
107 lines
3.7 KiB
C
#ifndef crypto_stream_chacha20_H
|
|
#define crypto_stream_chacha20_H
|
|
|
|
/*
|
|
* WARNING: This is just a stream cipher. It is NOT authenticated encryption.
|
|
* While it provides some protection against eavesdropping, it does NOT
|
|
* provide any security against active attacks.
|
|
* Unless you know what you're doing, what you are looking for is probably
|
|
* the crypto_box functions.
|
|
*/
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include "export.h"
|
|
|
|
#ifdef __cplusplus
|
|
# ifdef __GNUC__
|
|
# pragma GCC diagnostic ignored "-Wlong-long"
|
|
# endif
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define crypto_stream_chacha20_KEYBYTES 32U
|
|
SODIUM_EXPORT
|
|
size_t crypto_stream_chacha20_keybytes(void);
|
|
|
|
#define crypto_stream_chacha20_NONCEBYTES 8U
|
|
SODIUM_EXPORT
|
|
size_t crypto_stream_chacha20_noncebytes(void);
|
|
|
|
#define crypto_stream_chacha20_MESSAGEBYTES_MAX SODIUM_SIZE_MAX
|
|
SODIUM_EXPORT
|
|
size_t crypto_stream_chacha20_messagebytes_max(void);
|
|
|
|
/* ChaCha20 with a 64-bit nonce and a 64-bit counter, as originally designed */
|
|
|
|
SODIUM_EXPORT
|
|
int crypto_stream_chacha20(unsigned char *c, unsigned long long clen,
|
|
const unsigned char *n, const unsigned char *k)
|
|
__attribute__ ((nonnull));
|
|
|
|
SODIUM_EXPORT
|
|
int crypto_stream_chacha20_xor(unsigned char *c, const unsigned char *m,
|
|
unsigned long long mlen, const unsigned char *n,
|
|
const unsigned char *k)
|
|
__attribute__ ((nonnull));
|
|
|
|
SODIUM_EXPORT
|
|
int crypto_stream_chacha20_xor_ic(unsigned char *c, const unsigned char *m,
|
|
unsigned long long mlen,
|
|
const unsigned char *n, uint64_t ic,
|
|
const unsigned char *k)
|
|
__attribute__ ((nonnull));
|
|
|
|
SODIUM_EXPORT
|
|
void crypto_stream_chacha20_keygen(unsigned char k[crypto_stream_chacha20_KEYBYTES])
|
|
__attribute__ ((nonnull));
|
|
|
|
/* ChaCha20 with a 96-bit nonce and a 32-bit counter (IETF) */
|
|
|
|
#define crypto_stream_chacha20_ietf_KEYBYTES 32U
|
|
SODIUM_EXPORT
|
|
size_t crypto_stream_chacha20_ietf_keybytes(void);
|
|
|
|
#define crypto_stream_chacha20_ietf_NONCEBYTES 12U
|
|
SODIUM_EXPORT
|
|
size_t crypto_stream_chacha20_ietf_noncebytes(void);
|
|
|
|
#define crypto_stream_chacha20_ietf_MESSAGEBYTES_MAX \
|
|
SODIUM_MIN(SODIUM_SIZE_MAX, 64ULL * (1ULL << 32))
|
|
SODIUM_EXPORT
|
|
size_t crypto_stream_chacha20_ietf_messagebytes_max(void);
|
|
|
|
SODIUM_EXPORT
|
|
int crypto_stream_chacha20_ietf(unsigned char *c, unsigned long long clen,
|
|
const unsigned char *n, const unsigned char *k)
|
|
__attribute__ ((nonnull));
|
|
|
|
SODIUM_EXPORT
|
|
int crypto_stream_chacha20_ietf_xor(unsigned char *c, const unsigned char *m,
|
|
unsigned long long mlen, const unsigned char *n,
|
|
const unsigned char *k)
|
|
__attribute__ ((nonnull));
|
|
|
|
SODIUM_EXPORT
|
|
int crypto_stream_chacha20_ietf_xor_ic(unsigned char *c, const unsigned char *m,
|
|
unsigned long long mlen,
|
|
const unsigned char *n, uint32_t ic,
|
|
const unsigned char *k)
|
|
__attribute__ ((nonnull));
|
|
|
|
SODIUM_EXPORT
|
|
void crypto_stream_chacha20_ietf_keygen(unsigned char k[crypto_stream_chacha20_ietf_KEYBYTES])
|
|
__attribute__ ((nonnull));
|
|
|
|
/* Aliases */
|
|
|
|
#define crypto_stream_chacha20_IETF_KEYBYTES crypto_stream_chacha20_ietf_KEYBYTES
|
|
#define crypto_stream_chacha20_IETF_NONCEBYTES crypto_stream_chacha20_ietf_NONCEBYTES
|
|
#define crypto_stream_chacha20_IETF_MESSAGEBYTES_MAX crypto_stream_chacha20_ietf_MESSAGEBYTES_MAX
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|