2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
27 /* see bearssl_block.h */
29 br_aes_ct64_cbcenc_init(br_aes_ct64_cbcenc_keys
*ctx
,
30 const void *key
, size_t len
)
32 ctx
->vtable
= &br_aes_ct64_cbcenc_vtable
;
33 ctx
->num_rounds
= br_aes_ct64_keysched(ctx
->skey
, key
, len
);
36 /* see bearssl_block.h */
38 br_aes_ct64_cbcenc_run(const br_aes_ct64_cbcenc_keys
*ctx
,
39 void *iv
, void *data
, size_t len
)
45 br_aes_ct64_skey_expand(sk_exp
, ctx
->num_rounds
, ctx
->skey
);
46 br_range_dec32le(ivw
, 4, iv
);
52 w
[0] = ivw
[0] ^ br_dec32le(buf
);
53 w
[1] = ivw
[1] ^ br_dec32le(buf
+ 4);
54 w
[2] = ivw
[2] ^ br_dec32le(buf
+ 8);
55 w
[3] = ivw
[3] ^ br_dec32le(buf
+ 12);
56 br_aes_ct64_interleave_in(&q
[0], &q
[4], w
);
58 br_aes_ct64_bitslice_encrypt(ctx
->num_rounds
, sk_exp
, q
);
60 br_aes_ct64_interleave_out(w
, q
[0], q
[4]);
61 memcpy(ivw
, w
, sizeof w
);
62 br_enc32le(buf
, w
[0]);
63 br_enc32le(buf
+ 4, w
[1]);
64 br_enc32le(buf
+ 8, w
[2]);
65 br_enc32le(buf
+ 12, w
[3]);
69 br_range_enc32le(iv
, ivw
, 4);
72 /* see bearssl_block.h */
73 const br_block_cbcenc_class br_aes_ct64_cbcenc_vtable
= {
74 sizeof(br_aes_ct64_cbcenc_keys
),
77 (void (*)(const br_block_cbcenc_class
**, const void *, size_t))
78 &br_aes_ct64_cbcenc_init
,
79 (void (*)(const br_block_cbcenc_class
*const *, void *, void *, size_t))
80 &br_aes_ct64_cbcenc_run