OpenCoverage

chacha.c

Absolute File Name:

/home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/chacha/chacha.c

Source code

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1 /* $OpenBSD: chacha.c,v 1.7 2015/12/09 14:07:55 bcook Exp $ */ -

2 /* -

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; -

}

executed 32 times by 2 tests: end of block

Executed by:

chachatest
evptest

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; -

}

executed 32 times by 2 tests: end of block

Executed by:

chachatest
evptest

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. */ -

if (ctx->unused > 0) {

ctx->unused > 0	Description
TRUE	evaluated 552 times by 1 test Evaluated by: chachatest
FALSE	evaluated 32 times by 2 tests Evaluated by: chachatest evptest

32-552

47 k = ctx->ks + 64 - ctx->unused; -

l = (len > ctx->unused) ? ctx->unused : len;

(len > ctx->unused)	Description
TRUE	never evaluated
FALSE	evaluated 552 times by 1 test Evaluated by: chachatest

0-552

for (i = 0; i < l; i++)

i < l	Description
TRUE	evaluated 768 times by 1 test Evaluated by: chachatest
FALSE	evaluated 552 times by 1 test Evaluated by: chachatest

552-768

*(out++) = *(in++) ^ *(k++);

executed 768 times by 1 test: *(out++) = *(in++) ^ *(k++);

Executed by:

chachatest

768

51 ctx->unused -= l; -

52 len -= l; -

}

executed 552 times by 1 test: end of block

Executed by:

chachatest

552

54 -

55 chacha_encrypt_bytes((chacha_ctx *)ctx, in, out, (uint32_t)len); -

}

executed 584 times by 2 tests: end of block

Executed by:

chachatest
evptest

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); -

if (counter != 0) {

counter != 0	Description
TRUE	evaluated 325 times by 3 tests Evaluated by: aeadtest ssltest tlstest
FALSE	evaluated 11 times by 2 tests Evaluated by: aeadtest chachatest

11-325

72 ctx.input[12] = (uint32_t)counter; -

73 ctx.input[13] = (uint32_t)(counter >> 32); -

}

executed 325 times by 3 tests: end of block

Executed by:

aeadtest
ssltest
tlstest

325

75 -

76 chacha_encrypt_bytes(&ctx, in, out, (uint32_t)len); -

}

executed 336 times by 4 tests: end of block

Executed by:

aeadtest
chachatest
ssltest
tlstest

336

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