OpenCoverage

cfb_enc.c

Absolute File Name:

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

Source code

Switch to Preprocessed file

Line Source Count

1 /* $OpenBSD: cfb_enc.c,v 1.13 2015/02/10 09:46:30 miod 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 #include <machine/endian.h> -

61 -

62 /* The input and output are loaded in multiples of 8 bits. -

63 * What this means is that if you hame numbits=12 and length=2 -

64 * the first 12 bits will be retrieved from the first byte and half -

65 * the second. The second 12 bits will come from the 3rd and half the 4th -

66 * byte. -

67 */ -

68 /* Until Aug 1 2003 this function did not correctly implement CFB-r, so it -

69 * will not be compatible with any encryption prior to that date. Ben. */ -

70 void DES_cfb_encrypt(const unsigned char *in, unsigned char *out, int numbits, -

71 long length, DES_key_schedule *schedule, DES_cblock *ivec, -

72 int enc) -

73 { -

74 DES_LONG d0,d1,v0,v1; -

75 unsigned long l=length; -

76 int num=numbits/8,n=(numbits+7)/8,i,rem=numbits%8; -

77 DES_LONG ti[2]; -

78 unsigned char *iv; -

79 #if BYTE_ORDER != LITTLE_ENDIAN -

80 unsigned char ovec[16]; -

81 #else -

82 unsigned int sh[4]; -

83 unsigned char *ovec=(unsigned char *)sh; -

84 #endif -

85 -

if (numbits<=0 || numbits > 64) return;

never executed: return;

numbits<=0	Description
TRUE	never evaluated
FALSE	evaluated 62 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

numbits > 64	Description
TRUE	never evaluated
FALSE	evaluated 62 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

0-62

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

88 c2l(iv,v0); -

89 c2l(iv,v1); -

if (enc)

enc	Description
TRUE	evaluated 31 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1
FALSE	evaluated 31 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

91 { -

while (l >= (unsigned long)n)

l >= (unsigned long)n	Description
TRUE	evaluated 1849 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1
FALSE	evaluated 31 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

31-1849

93 { -

94 l-=n; -

95 ti[0]=v0; -

96 ti[1]=v1; -

97 DES_encrypt1((DES_LONG *)ti,schedule,DES_ENCRYPT); -

c2ln(in,d0,d1,n);

executed 1849 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

code before this statement executed 3 times by 1 test: case 7:

Executed by:

destest

code before this statement executed 3 times by 1 test: case 6:

Executed by:

destest

code before this statement executed 7 times by 1 test: case 5:

Executed by:

destest

code before this statement executed 7 times by 1 test: case 4:

Executed by:

destest

code before this statement executed 13 times by 1 test: case 3:

Executed by:

destest

code before this statement executed 13 times by 1 test: case 2:

Executed by:

destest

code before this statement executed 25 times by 1 test: case 1:

Executed by:

destest

executed 3 times by 1 test: case 8:

Executed by:

destest

never executed: case 7:

executed 4 times by 1 test: case 6:

Executed by:

destest

never executed: case 5:

executed 6 times by 1 test: case 4:

Executed by:

destest

never executed: case 3:

executed 12 times by 1 test: case 2:

Executed by:

destest

executed 1849 times by 2 tests: case 1:

Executed by:

destest
libcrypto.so.44.0.1

0-1849

99 in+=n; -

100 d0^=ti[0]; -

101 d1^=ti[1]; -

102

l2cn(d0,d1,out,n);

executed 1849 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

code before this statement executed 3 times by 1 test: case 7:

Executed by:

destest

code before this statement executed 3 times by 1 test: case 6:

Executed by:

destest

code before this statement executed 7 times by 1 test: case 5:

Executed by:

destest

code before this statement executed 7 times by 1 test: case 4:

Executed by:

destest

code before this statement executed 13 times by 1 test: case 3:

Executed by:

destest

code before this statement executed 13 times by 1 test: case 2:

Executed by:

destest

code before this statement executed 25 times by 1 test: case 1:

Executed by:

destest

executed 3 times by 1 test: case 8:

Executed by:

destest

never executed: case 7:

executed 4 times by 1 test: case 6:

Executed by:

destest

never executed: case 5:

executed 6 times by 1 test: case 4:

Executed by:

destest

never executed: case 3:

executed 12 times by 1 test: case 2:

Executed by:

destest

executed 1849 times by 2 tests: case 1:

Executed by:

destest
libcrypto.so.44.0.1

0-1849

103 out+=n; -

104 /* 30-08-94 - eay - changed because l>>32 and -

105 * l<<32 are bad under gcc :-( */ -

106

if (numbits == 32)

numbits == 32	Description
TRUE	evaluated 6 times by 1 test Evaluated by: destest
FALSE	evaluated 1843 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

6-1843

107

{ v0=v1; v1=d0; }

executed 6 times by 1 test: end of block

Executed by:

destest

108

else if (numbits == 64)

numbits == 64	Description
TRUE	evaluated 3 times by 1 test Evaluated by: destest
FALSE	evaluated 1840 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

3-1840

109

{ v0=d0; v1=d1; }

executed 3 times by 1 test: end of block

Executed by:

destest

110 else -

111 { -

112 #if BYTE_ORDER != LITTLE_ENDIAN -

113 iv=&ovec[0]; -

114 l2c(v0,iv); -

115 l2c(v1,iv); -

116 l2c(d0,iv); -

117 l2c(d1,iv); -

118 #else -

119 sh[0]=v0, sh[1]=v1, sh[2]=d0, sh[3]=d1; -

120 #endif -

121

if (rem==0)

rem==0	Description
TRUE	evaluated 1840 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1
FALSE	never evaluated

0-1840

122

memmove(ovec,ovec+num,8);

executed 1840 times by 2 tests: memmove(ovec,ovec+num,8);

Executed by:

destest
libcrypto.so.44.0.1

1840

123 else -

124

for(i=0 ; i < 8 ; ++i)

i < 8	Description
TRUE	never evaluated
FALSE	never evaluated

125

ovec[i]=ovec[i+num]<<rem |

never executed: ovec[i]=ovec[i+num]<<rem | ovec[i+num+1]>>(8-rem);

126

ovec[i+num+1]>>(8-rem);

never executed: ovec[i]=ovec[i+num]<<rem | ovec[i+num+1]>>(8-rem);

127 #if BYTE_ORDER == LITTLE_ENDIAN -

128 v0=sh[0], v1=sh[1]; -

129 #else -

130 iv=&ovec[0]; -

131 c2l(iv,v0); -

132 c2l(iv,v1); -

133 #endif -

134

}

executed 1840 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

1840

135 } -

136

}

executed 31 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

137 else -

138 { -

139

while (l >= (unsigned long)n)

l >= (unsigned long)n	Description
TRUE	evaluated 1849 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1
FALSE	evaluated 31 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

31-1849

140 { -

141 l-=n; -

142 ti[0]=v0; -

143 ti[1]=v1; -

144 DES_encrypt1((DES_LONG *)ti,schedule,DES_ENCRYPT); -

145

c2ln(in,d0,d1,n);

executed 1849 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

code before this statement executed 3 times by 1 test: case 7:

Executed by:

destest

code before this statement executed 3 times by 1 test: case 6:

Executed by:

destest

code before this statement executed 7 times by 1 test: case 5:

Executed by:

destest

code before this statement executed 7 times by 1 test: case 4:

Executed by:

destest

code before this statement executed 13 times by 1 test: case 3:

Executed by:

destest

code before this statement executed 13 times by 1 test: case 2:

Executed by:

destest

code before this statement executed 25 times by 1 test: case 1:

Executed by:

destest

executed 3 times by 1 test: case 8:

Executed by:

destest

never executed: case 7:

executed 4 times by 1 test: case 6:

Executed by:

destest

never executed: case 5:

executed 6 times by 1 test: case 4:

Executed by:

destest

never executed: case 3:

executed 12 times by 1 test: case 2:

Executed by:

destest

executed 1849 times by 2 tests: case 1:

Executed by:

destest
libcrypto.so.44.0.1

0-1849

146 in+=n; -

147 /* 30-08-94 - eay - changed because l>>32 and -

148 * l<<32 are bad under gcc :-( */ -

149

if (numbits == 32)

numbits == 32	Description
TRUE	evaluated 6 times by 1 test Evaluated by: destest
FALSE	evaluated 1843 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

6-1843

150

{ v0=v1; v1=d0; }

executed 6 times by 1 test: end of block

Executed by:

destest

151

else if (numbits == 64)

numbits == 64	Description
TRUE	evaluated 3 times by 1 test Evaluated by: destest
FALSE	evaluated 1840 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

3-1840

152

{ v0=d0; v1=d1; }

executed 3 times by 1 test: end of block

Executed by:

destest

153 else -

154 { -

155 #if BYTE_ORDER != LITTLE_ENDIAN -

156 iv=&ovec[0]; -

157 l2c(v0,iv); -

158 l2c(v1,iv); -

159 l2c(d0,iv); -

160 l2c(d1,iv); -

161 #else -

162 sh[0]=v0, sh[1]=v1, sh[2]=d0, sh[3]=d1; -

163 #endif -

164

if (rem==0)

rem==0	Description
TRUE	evaluated 1840 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1
FALSE	never evaluated

0-1840

165

memmove(ovec,ovec+num,8);

executed 1840 times by 2 tests: memmove(ovec,ovec+num,8);

Executed by:

destest
libcrypto.so.44.0.1

1840

166 else -

167

for(i=0 ; i < 8 ; ++i)

i < 8	Description
TRUE	never evaluated
FALSE	never evaluated

168

ovec[i]=ovec[i+num]<<rem |

never executed: ovec[i]=ovec[i+num]<<rem | ovec[i+num+1]>>(8-rem);

169

ovec[i+num+1]>>(8-rem);

never executed: ovec[i]=ovec[i+num]<<rem | ovec[i+num+1]>>(8-rem);

170 #if BYTE_ORDER == LITTLE_ENDIAN -

171 v0=sh[0], v1=sh[1]; -

172 #else -

173 iv=&ovec[0]; -

174 c2l(iv,v0); -

175 c2l(iv,v1); -

176 #endif -

177

}

executed 1840 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

1840

178 d0^=ti[0]; -

179 d1^=ti[1]; -

180

l2cn(d0,d1,out,n);

executed 1849 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

code before this statement executed 3 times by 1 test: case 7:

Executed by:

destest

code before this statement executed 3 times by 1 test: case 6:

Executed by:

destest

code before this statement executed 7 times by 1 test: case 5:

Executed by:

destest

code before this statement executed 7 times by 1 test: case 4:

Executed by:

destest

code before this statement executed 13 times by 1 test: case 3:

Executed by:

destest

code before this statement executed 13 times by 1 test: case 2:

Executed by:

destest

code before this statement executed 25 times by 1 test: case 1:

Executed by:

destest

executed 3 times by 1 test: case 8:

Executed by:

destest

never executed: case 7:

executed 4 times by 1 test: case 6:

Executed by:

destest

never executed: case 5:

executed 6 times by 1 test: case 4:

Executed by:

destest

never executed: case 3:

executed 12 times by 1 test: case 2:

Executed by:

destest

executed 1849 times by 2 tests: case 1:

Executed by:

destest
libcrypto.so.44.0.1

0-1849

181 out+=n; -

182

}

executed 1849 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

1849

183

}

executed 31 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

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

185 l2c(v0,iv); -

186 l2c(v1,iv); -

187 v0=v1=d0=d1=ti[0]=ti[1]=0; -

188

}

executed 62 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

189 -

Source code

Switch to Preprocessed file

Generated by Squish Coco 4.2.2