mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-11-27 14:44:21 +08:00
0fde8acdad
[Makefile.in PROTOCOL PROTOCOL.chacha20poly1305 authfile.c chacha.c]
[chacha.h cipher-chachapoly.c cipher-chachapoly.h cipher.c cipher.h]
[dh.c myproposal.h packet.c poly1305.c poly1305.h servconf.c ssh.1]
[ssh.c ssh_config.5 sshd_config.5] Add a new protocol 2 transport
cipher "chacha20-poly1305@openssh.com" that combines Daniel
Bernstein's ChaCha20 stream cipher and Poly1305 MAC to build an
authenticated encryption mode.
Inspired by and similar to Adam Langley's proposal for TLS:
http://tools.ietf.org/html/draft-agl-tls-chacha20poly1305-03
but differs in layout used for the MAC calculation and the use of a
second ChaCha20 instance to separately encrypt packet lengths.
Details are in the PROTOCOL.chacha20poly1305 file.
Feedback markus@, naddy@; manpage bits Loganden Velvindron @ AfriNIC
ok markus@ naddy@
42 lines
1.6 KiB
C
42 lines
1.6 KiB
C
/* $OpenBSD: cipher-chachapoly.h,v 1.1 2013/11/21 00:45:44 djm Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) Damien Miller 2013 <djm@mindrot.org>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
#ifndef CHACHA_POLY_AEAD_H
|
|
#define CHACHA_POLY_AEAD_H
|
|
|
|
#include <sys/types.h>
|
|
#include "chacha.h"
|
|
#include "poly1305.h"
|
|
|
|
#define CHACHA_KEYLEN 32 /* Only 256 bit keys used here */
|
|
|
|
struct chachapoly_ctx {
|
|
struct chacha_ctx main_ctx, header_ctx;
|
|
};
|
|
|
|
void chachapoly_init(struct chachapoly_ctx *cpctx,
|
|
const u_char *key, u_int keylen)
|
|
__attribute__((__bounded__(__buffer__, 2, 3)));
|
|
int chachapoly_crypt(struct chachapoly_ctx *cpctx, u_int seqnr,
|
|
u_char *dest, const u_char *src, u_int len, u_int aadlen, u_int authlen,
|
|
int do_encrypt);
|
|
int chachapoly_get_length(struct chachapoly_ctx *cpctx,
|
|
u_int *plenp, u_int seqnr, const u_char *cp, u_int len)
|
|
__attribute__((__bounded__(__buffer__, 4, 5)));
|
|
|
|
#endif /* CHACHA_POLY_AEAD_H */
|