Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/chacha/chacha.c |
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1 | /* $OpenBSD: chacha.c,v 1.7 2015/12/09 14:07:55 bcook 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 <stdint.h> | - | ||||||
19 | - | |||||||
20 | #include <openssl/chacha.h> | - | ||||||
21 | - | |||||||
22 | #include "chacha-merged.c" | - | ||||||
23 | - | |||||||
24 | void | - | ||||||
25 | ChaCha_set_key(ChaCha_ctx *ctx, const unsigned char *key, uint32_t keybits) | - | ||||||
26 | { | - | ||||||
27 | chacha_keysetup((chacha_ctx *)ctx, key, keybits); | - | ||||||
28 | ctx->unused = 0; | - | ||||||
29 | } executed 32 times by 2 tests: end of block Executed by:
| 32 | ||||||
30 | - | |||||||
31 | void | - | ||||||
32 | ChaCha_set_iv(ChaCha_ctx *ctx, const unsigned char *iv, | - | ||||||
33 | const unsigned char *counter) | - | ||||||
34 | { | - | ||||||
35 | chacha_ivsetup((chacha_ctx *)ctx, iv, counter); | - | ||||||
36 | ctx->unused = 0; | - | ||||||
37 | } executed 32 times by 2 tests: end of block Executed by:
| 32 | ||||||
38 | - | |||||||
39 | void | - | ||||||
40 | ChaCha(ChaCha_ctx *ctx, unsigned char *out, const unsigned char *in, size_t len) | - | ||||||
41 | { | - | ||||||
42 | unsigned char *k; | - | ||||||
43 | int i, l; | - | ||||||
44 | - | |||||||
45 | /* Consume remaining keystream, if any exists. */ | - | ||||||
46 | if (ctx->unused > 0) {
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47 | k = ctx->ks + 64 - ctx->unused; | - | ||||||
48 | l = (len > ctx->unused) ? ctx->unused : len;
| 0-552 | ||||||
49 | for (i = 0; i < l; i++)
| 552-768 | ||||||
50 | *(out++) = *(in++) ^ *(k++); executed 768 times by 1 test: *(out++) = *(in++) ^ *(k++); Executed by:
| 768 | ||||||
51 | ctx->unused -= l; | - | ||||||
52 | len -= l; | - | ||||||
53 | } executed 552 times by 1 test: end of block Executed by:
| 552 | ||||||
54 | - | |||||||
55 | chacha_encrypt_bytes((chacha_ctx *)ctx, in, out, (uint32_t)len); | - | ||||||
56 | } executed 584 times by 2 tests: end of block Executed by:
| 584 | ||||||
57 | - | |||||||
58 | void | - | ||||||
59 | CRYPTO_chacha_20(unsigned char *out, const unsigned char *in, size_t len, | - | ||||||
60 | const unsigned char key[32], const unsigned char iv[8], uint64_t counter) | - | ||||||
61 | { | - | ||||||
62 | struct chacha_ctx ctx; | - | ||||||
63 | - | |||||||
64 | /* | - | ||||||
65 | * chacha_ivsetup expects the counter to be in u8. Rather than | - | ||||||
66 | * converting size_t to u8 and then back again, pass a counter of | - | ||||||
67 | * NULL and manually assign it afterwards. | - | ||||||
68 | */ | - | ||||||
69 | chacha_keysetup(&ctx, key, 256); | - | ||||||
70 | chacha_ivsetup(&ctx, iv, NULL); | - | ||||||
71 | if (counter != 0) {
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72 | ctx.input[12] = (uint32_t)counter; | - | ||||||
73 | ctx.input[13] = (uint32_t)(counter >> 32); | - | ||||||
74 | } executed 325 times by 3 tests: end of block Executed by:
| 325 | ||||||
75 | - | |||||||
76 | chacha_encrypt_bytes(&ctx, in, out, (uint32_t)len); | - | ||||||
77 | } executed 336 times by 4 tests: end of block Executed by:
| 336 | ||||||
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