You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* salsa20-256-set-key.c
|
|
|
|
The Salsa20 stream cipher. Key setup for 128-bit keys.
|
|
|
|
Copyright (C) 2012 Simon Josefsson
|
|
Copyright (C) 2012-2014 Niels Möller
|
|
|
|
This file is part of GNU Nettle.
|
|
|
|
GNU Nettle is free software: you can redistribute it and/or
|
|
modify it under the terms of either:
|
|
|
|
* the GNU Lesser General Public License as published by the Free
|
|
Software Foundation; either version 3 of the License, or (at your
|
|
option) any later version.
|
|
|
|
or
|
|
|
|
* the GNU General Public License as published by the Free
|
|
Software Foundation; either version 2 of the License, or (at your
|
|
option) any later version.
|
|
|
|
or both in parallel, as here.
|
|
|
|
GNU Nettle is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received copies of the GNU General Public License and
|
|
the GNU Lesser General Public License along with this program. If
|
|
not, see http://www.gnu.org/licenses/.
|
|
*/
|
|
|
|
/* Based on:
|
|
salsa20-ref.c version 20051118
|
|
D. J. Bernstein
|
|
Public domain.
|
|
*/
|
|
|
|
#if HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include "salsa20.h"
|
|
|
|
#include "macros.h"
|
|
|
|
void
|
|
salsa20_256_set_key(struct salsa20_ctx *ctx, const uint8_t *key)
|
|
{
|
|
ctx->input[1] = LE_READ_UINT32(key + 0);
|
|
ctx->input[2] = LE_READ_UINT32(key + 4);
|
|
ctx->input[3] = LE_READ_UINT32(key + 8);
|
|
ctx->input[4] = LE_READ_UINT32(key + 12);
|
|
|
|
ctx->input[11] = LE_READ_UINT32(key + 16);
|
|
ctx->input[12] = LE_READ_UINT32(key + 20);
|
|
ctx->input[13] = LE_READ_UINT32(key + 24);
|
|
ctx->input[14] = LE_READ_UINT32(key + 28);
|
|
|
|
/* "expand 32-byte k" */
|
|
ctx->input[0] = 0x61707865;
|
|
ctx->input[5] = 0x3320646e;
|
|
ctx->input[10] = 0x79622d32;
|
|
ctx->input[15] = 0x6b206574;
|
|
}
|