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pcbc_enc.c

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

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1 /* $OpenBSD: pcbc_enc.c,v 1.6 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 void DES_pcbc_encrypt(const unsigned char *input, unsigned char *output, -

62 long length, DES_key_schedule *schedule, -

63 DES_cblock *ivec, int enc) -

64 { -

65 DES_LONG sin0,sin1,xor0,xor1,tout0,tout1; -

66 DES_LONG tin[2]; -

67 const unsigned char *in; -

68 unsigned char *out,*iv; -

69 -

70 in=input; -

71 out=output; -

72 iv = &(*ivec)[0]; -

73 -

if (enc)

enc	Description
TRUE	evaluated 1 time by 1 test Evaluated by: destest
FALSE	evaluated 1 time by 1 test Evaluated by: destest

75 { -

76 c2l(iv,xor0); -

77 c2l(iv,xor1); -

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

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

1-4

79 { -

if (length >= 8)

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

1-3

81 { -

82 c2l(in,sin0); -

83 c2l(in,sin1); -

}

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85 else -

c2ln(in,sin0,sin1,length);

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code before this statement never executed: case 7:

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0-1

87 tin[0]=sin0^xor0; -

88 tin[1]=sin1^xor1; -

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

90 tout0=tin[0]; -

91 tout1=tin[1]; -

92 xor0=sin0^tout0; -

93 xor1=sin1^tout1; -

94 l2c(tout0,out); -

95 l2c(tout1,out); -

}

executed 4 times by 1 test: end of block

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}

executed 1 time by 1 test: end of block

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98 else -

99 { -

100 c2l(iv,xor0); c2l(iv,xor1); -

101

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

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

1-4

102 { -

103 c2l(in,sin0); -

104 c2l(in,sin1); -

105 tin[0]=sin0; -

106 tin[1]=sin1; -

107 DES_encrypt1((DES_LONG *)tin,schedule,DES_DECRYPT); -

108 tout0=tin[0]^xor0; -

109 tout1=tin[1]^xor1; -

110

if (length >= 8)

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

1-3

111 { -

112 l2c(tout0,out); -

113 l2c(tout1,out); -

114

}

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115 else -

116

l2cn(tout0,tout1,out,length);

executed 1 time by 1 test: end of block

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code before this statement never executed: case 7:

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0-1

117 xor0=tout0^sin0; -

118 xor1=tout1^sin1; -

119

}

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120

}

executed 1 time by 1 test: end of block

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destest

121 tin[0]=tin[1]=0; -

122 sin0=sin1=xor0=xor1=tout0=tout1=0; -

123

}

executed 2 times by 1 test: end of block

Executed by:

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