1 |
|
|
/* $OpenBSD: e_chacha.c,v 1.5 2014/08/04 04:16:11 miod Exp $ */ |
2 |
|
|
/* |
3 |
|
|
* Copyright (c) 2014 Joel Sing <jsing@openbsd.org> |
4 |
|
|
* |
5 |
|
|
* Permission to use, copy, modify, and distribute this software for any |
6 |
|
|
* purpose with or without fee is hereby granted, provided that the above |
7 |
|
|
* copyright notice and this permission notice appear in all copies. |
8 |
|
|
* |
9 |
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
10 |
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
11 |
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
12 |
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
13 |
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
14 |
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
15 |
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
16 |
|
|
*/ |
17 |
|
|
|
18 |
|
|
#include <openssl/opensslconf.h> |
19 |
|
|
|
20 |
|
|
#ifndef OPENSSL_NO_CHACHA |
21 |
|
|
|
22 |
|
|
#include <openssl/chacha.h> |
23 |
|
|
#include <openssl/evp.h> |
24 |
|
|
#include <openssl/objects.h> |
25 |
|
|
|
26 |
|
|
#include "evp_locl.h" |
27 |
|
|
|
28 |
|
|
static int chacha_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
29 |
|
|
const unsigned char *in, size_t len); |
30 |
|
|
static int chacha_init(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
31 |
|
|
const unsigned char *iv, int enc); |
32 |
|
|
|
33 |
|
|
static const EVP_CIPHER chacha20_cipher = { |
34 |
|
|
.nid = NID_chacha20, |
35 |
|
|
.block_size = 1, |
36 |
|
|
.key_len = 32, |
37 |
|
|
.iv_len = 8, |
38 |
|
|
.flags = EVP_CIPH_STREAM_CIPHER, |
39 |
|
|
.init = chacha_init, |
40 |
|
|
.do_cipher = chacha_cipher, |
41 |
|
|
.ctx_size = sizeof(ChaCha_ctx) |
42 |
|
|
}; |
43 |
|
|
|
44 |
|
|
const EVP_CIPHER * |
45 |
|
|
EVP_chacha20(void) |
46 |
|
|
{ |
47 |
|
3106 |
return (&chacha20_cipher); |
48 |
|
|
} |
49 |
|
|
|
50 |
|
|
static int |
51 |
|
|
chacha_init(EVP_CIPHER_CTX *ctx, const unsigned char *key, |
52 |
|
|
const unsigned char *iv, int enc) |
53 |
|
|
{ |
54 |
|
156 |
ChaCha_set_key((ChaCha_ctx *)ctx->cipher_data, key, |
55 |
|
52 |
EVP_CIPHER_CTX_key_length(ctx) * 8); |
56 |
✓✗ |
52 |
if (iv != NULL) |
57 |
|
52 |
ChaCha_set_iv((ChaCha_ctx *)ctx->cipher_data, iv, NULL); |
58 |
|
52 |
return 1; |
59 |
|
|
} |
60 |
|
|
|
61 |
|
|
static int |
62 |
|
|
chacha_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, |
63 |
|
|
size_t len) |
64 |
|
|
{ |
65 |
|
104 |
ChaCha((ChaCha_ctx *)ctx->cipher_data, out, in, len); |
66 |
|
52 |
return 1; |
67 |
|
|
} |
68 |
|
|
|
69 |
|
|
#endif |