OpenCoverage

qud_cksm.c

Absolute File Name:

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

Source code

Switch to Preprocessed file

Line Source Count

1 /* $OpenBSD: qud_cksm.c,v 1.7 2014/06/12 15:49:28 deraadt Exp $ */ -

4 * -

5 * This package is an SSL implementation written -

6 * by Eric Young (eay@cryptsoft.com). -

7 * The implementation was written so as to conform with Netscapes SSL. -

8 * -

9 * This library is free for commercial and non-commercial use as long as -

10 * the following conditions are aheared to. The following conditions -

11 * apply to all code found in this distribution, be it the RC4, RSA, -

12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation -

13 * included with this distribution is covered by the same copyright terms -

14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). -

15 * -

16 * Copyright remains Eric Young's, and as such any Copyright notices in -

17 * the code are not to be removed. -

18 * If this package is used in a product, Eric Young should be given attribution -

19 * as the author of the parts of the library used. -

20 * This can be in the form of a textual message at program startup or -

21 * in documentation (online or textual) provided with the package. -

22 * -

23 * Redistribution and use in source and binary forms, with or without -

24 * modification, are permitted provided that the following conditions -

25 * are met: -

26 * 1. Redistributions of source code must retain the copyright -

27 * notice, this list of conditions and the following disclaimer. -

28 * 2. Redistributions in binary form must reproduce the above copyright -

29 * notice, this list of conditions and the following disclaimer in the -

30 * documentation and/or other materials provided with the distribution. -

31 * 3. All advertising materials mentioning features or use of this software -

32 * must display the following acknowledgement: -

33 * "This product includes cryptographic software written by -

34 * Eric Young (eay@cryptsoft.com)" -

35 * The word 'cryptographic' can be left out if the rouines from the library -

36 * being used are not cryptographic related :-). -

37 * 4. If you include any Windows specific code (or a derivative thereof) from -

38 * the apps directory (application code) you must include an acknowledgement: -

39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" -

40 * -

41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND -

42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -

43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -

44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE -

45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -

46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -

47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -

48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -

49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY -

50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF -

51 * SUCH DAMAGE. -

52 * -

53 * The licence and distribution terms for any publically available version or -

54 * derivative of this code cannot be changed. i.e. this code cannot simply be -

55 * copied and put under another distribution licence -

56 * [including the GNU Public Licence.] -

57 */ -

58 -

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

60 * IEEE Communications Magazine Sept 1985 Vol. 23 No. 9 p 29-40 -

61 * This module in only based on the code in this paper and is -

62 * almost definitely not the same as the MIT implementation. -

63 */ -

64 #include "des_locl.h" -

65 -

66 /* bug fix for dos - 7/6/91 - Larry hughes@logos.ucs.indiana.edu */ -

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

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

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

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

71 -

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

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

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

75 -

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

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

78 { -

79 DES_LONG z0,z1,t0,t1; -

80 int i; -

81 long l; -

82 const unsigned char *cp; -

83 DES_LONG *lp; -

84 -

if (out_count < 1) out_count=1;

never executed: out_count=1;

out_count < 1	Description
TRUE	never evaluated
FALSE	evaluated 1 time by 1 test Evaluated by: destest

0-1

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

87 -

88 z0=Q_B0((*seed)[0])|Q_B1((*seed)[1])|Q_B2((*seed)[2])|Q_B3((*seed)[3]); -

89 z1=Q_B0((*seed)[4])|Q_B1((*seed)[5])|Q_B2((*seed)[6])|Q_B3((*seed)[7]); -

90 -

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

(i<4)	Description
TRUE	evaluated 3 times by 1 test Evaluated by: destest
FALSE	never evaluated

(i<out_count)	Description
TRUE	evaluated 2 times by 1 test Evaluated by: destest
FALSE	evaluated 1 time by 1 test Evaluated by: destest

0-3

92 { -

93 cp=input; -

94 l=length; -

while (l > 0)

l > 0	Description
TRUE	evaluated 28 times by 1 test Evaluated by: destest
FALSE	evaluated 2 times by 1 test Evaluated by: destest

2-28

96 { -

if (l > 1)

l > 1	Description
TRUE	evaluated 28 times by 1 test Evaluated by: destest
FALSE	never evaluated

0-28

98 { -

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

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

101 l--; -

102

}

executed 28 times by 1 test: end of block

Executed by:

destest

103 else -

104

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

never executed: t0= (unsigned int)(*(cp++));

105 l--; -

106 /* add */ -

107 t0+=z0; -

108 t0&=0xffffffffL; -

109 t1=z1; -

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

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

112 &0xffffffffL)%0x7fffffffL; -

113 z1=((t0*((t1+NOISE)&0xffffffffL))&0xffffffffL)%0x7fffffffL; -

114

}

executed 28 times by 1 test: end of block

Executed by:

destest

115

if (lp != NULL)

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

0-2

116 { -

117 /* The MIT library assumes that the checksum is -

118 * composed of 2*out_count 32 bit ints */ -

119 *lp++ = z0; -

120 *lp++ = z1; -

121

}

executed 2 times by 1 test: end of block

Executed by:

destest

122

}

executed 2 times by 1 test: end of block

Executed by:

destest

123

return(z0);

executed 1 time by 1 test: return(z0);

Executed by:

destest

124 } -

125 -

Source code

Switch to Preprocessed file

Generated by Squish Coco 4.2.2