Contributors: 5
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Martin Willi |
73 |
52.52% |
1 |
11.11% |
| Eric Biggers |
39 |
28.06% |
5 |
55.56% |
| Ard Biesheuvel |
21 |
15.11% |
1 |
11.11% |
| Jeff Johnson |
5 |
3.60% |
1 |
11.11% |
| Thomas Gleixner |
1 |
0.72% |
1 |
11.11% |
| Total |
139 |
|
9 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* The ChaCha stream cipher (RFC7539)
*
* Copyright (C) 2015 Martin Willi
*/
#include <crypto/algapi.h> // for crypto_xor_cpy
#include <crypto/chacha.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/module.h>
void chacha_crypt_generic(struct chacha_state *state, u8 *dst, const u8 *src,
unsigned int bytes, int nrounds)
{
/* aligned to potentially speed up crypto_xor() */
u8 stream[CHACHA_BLOCK_SIZE] __aligned(sizeof(long));
while (bytes >= CHACHA_BLOCK_SIZE) {
chacha_block_generic(state, stream, nrounds);
crypto_xor_cpy(dst, src, stream, CHACHA_BLOCK_SIZE);
bytes -= CHACHA_BLOCK_SIZE;
dst += CHACHA_BLOCK_SIZE;
src += CHACHA_BLOCK_SIZE;
}
if (bytes) {
chacha_block_generic(state, stream, nrounds);
crypto_xor_cpy(dst, src, stream, bytes);
}
}
EXPORT_SYMBOL(chacha_crypt_generic);
MODULE_DESCRIPTION("ChaCha stream cipher (RFC7539)");
MODULE_LICENSE("GPL");