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qud_cksm.c

Absolute File Name:

/home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/des/qud_cksm.c

Source code

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Line Source Count

1 /* -

3 * -

4 * Licensed under the OpenSSL license (the "License"). You may not use -

5 * this file except in compliance with the License. You can obtain a copy -

6 * in the file LICENSE in the source distribution or at -

7 * https://www.openssl.org/source/license.html -

8 */ -

9 -

10 /* -

11 * From "Message Authentication" R.R. Jueneman, S.M. Matyas, C.H. Meyer IEEE -

12 * Communications Magazine Sept 1985 Vol. 23 No. 9 p 29-40 This module in -

13 * only based on the code in this paper and is almost definitely not the same -

14 * as the MIT implementation. -

15 */ -

16 #include "des_locl.h" -

17 -

18 #define Q_B0(a) (((DES_LONG)(a))) -

19 #define Q_B1(a) (((DES_LONG)(a))<<8) -

20 #define Q_B2(a) (((DES_LONG)(a))<<16) -

21 #define Q_B3(a) (((DES_LONG)(a))<<24) -

22 -

23 /* used to scramble things a bit */ -

24 /* Got the value MIT uses via brute force :-) 2/10/90 eay */ -

25 #define NOISE ((DES_LONG)83653421L) -

26 -

27 DES_LONG DES_quad_cksum(const unsigned char *input, DES_cblock output[], -

28 long length, int out_count, DES_cblock *seed) -

29 { -

30 DES_LONG z0, z1, t0, t1; -

31 int i; -

32 long l; -

33 const unsigned char *cp; -

34 DES_LONG *lp; -

35 -

if (out_count < 1)

out_count < 1	Description
TRUE	never evaluated
FALSE	evaluated 1 time by 1 test Evaluated by: libcrypto.so.1.1

0-1

out_count = 1;

never executed: out_count = 1;

38 lp = (DES_LONG *)&(output[0])[0]; -

39 -

40 z0 = Q_B0((*seed)[0]) | Q_B1((*seed)[1]) | Q_B2((*seed)[2]) | -

41 Q_B3((*seed)[3]); -

42 z1 = Q_B0((*seed)[4]) | Q_B1((*seed)[5]) | Q_B2((*seed)[6]) | -

43 Q_B3((*seed)[7]); -

44 -

for (i = 0; ((i < 4) && (i < out_count)); i++) {

(i < 4)	Description
TRUE	evaluated 3 times by 1 test Evaluated by: libcrypto.so.1.1
FALSE	never evaluated

(i < out_count)	Description
TRUE	evaluated 2 times by 1 test Evaluated by: libcrypto.so.1.1
FALSE	evaluated 1 time by 1 test Evaluated by: libcrypto.so.1.1

0-3

46 cp = input; -

47 l = length; -

while (l > 0) {

l > 0	Description
TRUE	evaluated 28 times by 1 test Evaluated by: libcrypto.so.1.1
FALSE	evaluated 2 times by 1 test Evaluated by: libcrypto.so.1.1

2-28

if (l > 1) {

l > 1	Description
TRUE	evaluated 28 times by 1 test Evaluated by: libcrypto.so.1.1
FALSE	never evaluated

0-28

50 t0 = (DES_LONG)(*(cp++)); -

51 t0 |= (DES_LONG)Q_B1(*(cp++)); -

52 l--; -

} else

executed 28 times by 1 test: end of block

Executed by:

libcrypto.so.1.1

t0 = (DES_LONG)(*(cp++));

never executed: t0 = (DES_LONG)(*(cp++));

55 l--; -

56 /* add */ -

57 t0 += z0; -

58 t0 &= 0xffffffffL; -

59 t1 = z1; -

60 /* square, well sort of square */ -

61 z0 = ((((t0 * t0) & 0xffffffffL) + ((t1 * t1) & 0xffffffffL)) -

62 & 0xffffffffL) % 0x7fffffffL; -

63 z1 = ((t0 * ((t1 + NOISE) & 0xffffffffL)) & 0xffffffffL) % -

64 0x7fffffffL; -

}

executed 28 times by 1 test: end of block

Executed by:

libcrypto.so.1.1

if (lp != NULL) {

lp != ((void *)0)	Description
TRUE	evaluated 2 times by 1 test Evaluated by: libcrypto.so.1.1
FALSE	never evaluated

0-2

67 /* -

68 * The MIT library assumes that the checksum is composed of -

69 * 2*out_count 32 bit ints -

70 */ -

71 *lp++ = z0; -

72 *lp++ = z1; -

}

executed 2 times by 1 test: end of block

Executed by:

libcrypto.so.1.1

}

executed 2 times by 1 test: end of block

Executed by:

libcrypto.so.1.1

return z0;

executed 1 time by 1 test: return z0;

Executed by:

libcrypto.so.1.1

76 } -

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