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cbc_cksm.c

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1 /* $OpenBSD: cbc_cksm.c,v 1.7 2014/10/28 07:35:58 jsg 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 #include "des_locl.h" -

60 -

61 DES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output, -

62 long length, DES_key_schedule *schedule, -

63 const_DES_cblock *ivec) -

64 { -

65 DES_LONG tout0,tout1,tin0,tin1; -

66 long l=length; -

67 DES_LONG tin[2]; -

68 unsigned char *out = &(*output)[0]; -

69 const unsigned char *iv = &(*ivec)[0]; -

70 -

71 c2l(iv,tout0); -

72 c2l(iv,tout1); -

for (; l>0; l-=8)

l>0	Description
TRUE	evaluated 4 times by 1 test Evaluated by: destest
FALSE	evaluated 1 time by 1 test Evaluated by: destest

1-4

74 { -

if (l >= 8)

l >= 8	Description
TRUE	evaluated 3 times by 1 test Evaluated by: destest
FALSE	evaluated 1 time by 1 test Evaluated by: destest

1-3

76 { -

77 c2l(in,tin0); -

78 c2l(in,tin1); -

}

executed 3 times by 1 test: end of block

Executed by:

destest

80 else -

c2ln(in,tin0,tin1,l);

executed 1 time by 1 test: end of block

Executed by:

destest

executed 1 time by 1 test: end of block

Executed by:

destest

code before this statement never executed: case 7:

code before this statement never executed: case 6:

code before this statement never executed: case 5:

code before this statement never executed: case 4:

code before this statement executed 1 time by 1 test: case 3:

Executed by:

destest

code before this statement executed 1 time by 1 test: case 2:

Executed by:

destest

code before this statement executed 1 time by 1 test: case 1:

Executed by:

destest

never executed: case 8:

never executed: case 7:

never executed: case 6:

never executed: case 5:

executed 1 time by 1 test: case 4:

Executed by:

destest

never executed: case 3:

never executed: case 2:

executed 1 time by 1 test: case 1:

Executed by:

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0-1

82 -

83 tin0^=tout0; tin[0]=tin0; -

84 tin1^=tout1; tin[1]=tin1; -

85 DES_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT); -

86 /* fix 15/10/91 eay - thanks to keithr@sco.COM */ -

87 tout0=tin[0]; -

88 tout1=tin[1]; -

}

executed 4 times by 1 test: end of block

Executed by:

destest

if (out != NULL)

out != ((void *)0)	Description
TRUE	evaluated 1 time by 1 test Evaluated by: destest
FALSE	never evaluated

0-1

91 { -

92 l2c(tout0,out); -

93 l2c(tout1,out); -

}

executed 1 time by 1 test: end of block

Executed by:

destest

95 tout0=tin0=tin1=tin[0]=tin[1]=0; -

96 /* -

97 Transform the data in tout1 so that it will -

98 match the return value that the MIT Kerberos -

99 mit_des_cbc_cksum API returns. -

100 */ -

101 tout1 = ((tout1 >> 24L) & 0x000000FF) -

102 | ((tout1 >> 8L) & 0x0000FF00) -

103 | ((tout1 << 8L) & 0x00FF0000) -

104 | ((tout1 << 24L) & 0xFF000000); -

105

return(tout1);

executed 1 time by 1 test: return(tout1);

Executed by:

destest

106 } -

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