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cfb64ede.c

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/home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/des/cfb64ede.c

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1 /* $OpenBSD: cfb64ede.c,v 1.9 2015/02/07 13:19:15 doug 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 /* The input and output encrypted as though 64bit cfb mode is being -

62 * used. The extra state information to record how much of the -

63 * 64bit block we have used is contained in *num; -

64 */ -

65 -

66 void DES_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out, -

67 long length, DES_key_schedule *ks1, -

68 DES_key_schedule *ks2, DES_key_schedule *ks3, -

69 DES_cblock *ivec, int *num, int enc) -

70 { -

71 DES_LONG v0,v1; -

72 long l=length; -

73 int n= *num; -

74 DES_LONG ti[2]; -

75 unsigned char *iv,c,cc; -

76 -

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

if (enc)

enc	Description
TRUE	evaluated 6 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1
FALSE	evaluated 6 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

79 { -

while (l--)

l--	Description
TRUE	evaluated 3576 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1
FALSE	evaluated 6 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

6-3576

81 { -

if (n == 0)

n == 0	Description
TRUE	evaluated 447 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1
FALSE	evaluated 3129 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

447-3129

83 { -

84 c2l(iv,v0); -

85 c2l(iv,v1); -

86 -

87 ti[0]=v0; -

88 ti[1]=v1; -

89 DES_encrypt3(ti,ks1,ks2,ks3); -

90 v0=ti[0]; -

91 v1=ti[1]; -

92 -

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

94 l2c(v0,iv); -

95 l2c(v1,iv); -

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

}

executed 447 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

447

98 c= *(in++)^iv[n]; -

99 *(out++)=c; -

100 iv[n]=c; -

101 n=(n+1)&0x07; -

102

}

executed 3576 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

3576

103

}

executed 6 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

104 else -

105 { -

106

while (l--)

l--	Description
TRUE	evaluated 3576 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1
FALSE	evaluated 6 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

6-3576

107 { -

108

if (n == 0)

n == 0	Description
TRUE	evaluated 447 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1
FALSE	evaluated 3129 times by 2 tests Evaluated by: destest libcrypto.so.44.0.1

447-3129

109 { -

110 c2l(iv,v0); -

111 c2l(iv,v1); -

112 -

113 ti[0]=v0; -

114 ti[1]=v1; -

115 DES_encrypt3(ti,ks1,ks2,ks3); -

116 v0=ti[0]; -

117 v1=ti[1]; -

118 -

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

120 l2c(v0,iv); -

121 l2c(v1,iv); -

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

123

}

executed 447 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

447

124 cc= *(in++); -

125 c=iv[n]; -

126 iv[n]=cc; -

127 *(out++)=c^cc; -

128 n=(n+1)&0x07; -

129

}

executed 3576 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

3576

130

}

executed 6 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

131 v0=v1=ti[0]=ti[1]=c=cc=0; -

132 *num=n; -

133

}

executed 12 times by 2 tests: end of block

Executed by:

destest
libcrypto.so.44.0.1

134 -

135 /* This is compatible with the single key CFB-r for DES, even thought that's -

136 * not what EVP needs. -

137 */ -

138 -

139 void DES_ede3_cfb_encrypt(const unsigned char *in,unsigned char *out, -

140 int numbits,long length,DES_key_schedule *ks1, -

141 DES_key_schedule *ks2,DES_key_schedule *ks3, -

142 DES_cblock *ivec,int enc) -

143 { -

144 DES_LONG d0,d1,v0,v1; -

145 unsigned long l=length,n=((unsigned int)numbits+7)/8; -

146 int num=numbits,i; -

147 DES_LONG ti[2]; -

148 unsigned char *iv; -

149 unsigned char ovec[16]; -

150 -

151

if (num > 64) return;

never executed: return;

num > 64	Description
TRUE	never evaluated
FALSE	never evaluated

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

153 c2l(iv,v0); -

154 c2l(iv,v1); -

155

if (enc)

enc	Description
TRUE	never evaluated
FALSE	never evaluated

156 { -

157

while (l >= n)

l >= n	Description
TRUE	never evaluated
FALSE	never evaluated

158 { -

159 l-=n; -

160 ti[0]=v0; -

161 ti[1]=v1; -

162 DES_encrypt3(ti,ks1,ks2,ks3); -

163

c2ln(in,d0,d1,n);

never executed: end of block

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 never executed: case 3:

code before this statement never executed: case 2:

code before this statement never executed: case 1:

never executed: case 8:

never executed: case 7:

never executed: case 6:

never executed: case 5:

never executed: case 4:

never executed: case 3:

never executed: case 2:

never executed: case 1:

164 in+=n; -

165 d0^=ti[0]; -

166 d1^=ti[1]; -

167

l2cn(d0,d1,out,n);

never executed: end of block

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 never executed: case 3:

code before this statement never executed: case 2:

code before this statement never executed: case 1:

never executed: case 8:

never executed: case 7:

never executed: case 6:

never executed: case 5:

never executed: case 4:

never executed: case 3:

never executed: case 2:

never executed: case 1:

168 out+=n; -

169 /* 30-08-94 - eay - changed because l>>32 and -

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

171

if (num == 32)

num == 32	Description
TRUE	never evaluated
FALSE	never evaluated

172

{ v0=v1; v1=d0; }

never executed: end of block

173

else if (num == 64)

num == 64	Description
TRUE	never evaluated
FALSE	never evaluated

174

{ v0=d0; v1=d1; }

never executed: end of block

175 else -

176 { -

177 iv=&ovec[0]; -

178 l2c(v0,iv); -

179 l2c(v1,iv); -

180 l2c(d0,iv); -

181 l2c(d1,iv); -

182 /* shift ovec left most of the bits... */ -

183 memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0)); -

184 /* now the remaining bits */ -

185

if(num%8 != 0)

num%8 != 0	Description
TRUE	never evaluated
FALSE	never evaluated

186

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

i < 8	Description
TRUE	never evaluated
FALSE	never evaluated

187 { -

188 ovec[i]<<=num%8; -

189 ovec[i]|=ovec[i+1]>>(8-num%8); -

190

}

never executed: end of block

191 iv=&ovec[0]; -

192 c2l(iv,v0); -

193 c2l(iv,v1); -

194

}

never executed: end of block

195 } -

196

}

never executed: end of block

197 else -

198 { -

199

while (l >= n)

l >= n	Description
TRUE	never evaluated
FALSE	never evaluated

200 { -

201 l-=n; -

202 ti[0]=v0; -

203 ti[1]=v1; -

204 DES_encrypt3(ti,ks1,ks2,ks3); -

205

c2ln(in,d0,d1,n);

never executed: end of block

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 never executed: case 3:

code before this statement never executed: case 2:

code before this statement never executed: case 1:

never executed: case 8:

never executed: case 7:

never executed: case 6:

never executed: case 5:

never executed: case 4:

never executed: case 3:

never executed: case 2:

never executed: case 1:

206 in+=n; -

207 /* 30-08-94 - eay - changed because l>>32 and -

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

209

if (num == 32)

num == 32	Description
TRUE	never evaluated
FALSE	never evaluated

210

{ v0=v1; v1=d0; }

never executed: end of block

211

else if (num == 64)

num == 64	Description
TRUE	never evaluated
FALSE	never evaluated

212

{ v0=d0; v1=d1; }

never executed: end of block

213 else -

214 { -

215 iv=&ovec[0]; -

216 l2c(v0,iv); -

217 l2c(v1,iv); -

218 l2c(d0,iv); -

219 l2c(d1,iv); -

220 /* shift ovec left most of the bits... */ -

221 memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0)); -

222 /* now the remaining bits */ -

223

if(num%8 != 0)

num%8 != 0	Description
TRUE	never evaluated
FALSE	never evaluated

224

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

i < 8	Description
TRUE	never evaluated
FALSE	never evaluated

225 { -

226 ovec[i]<<=num%8; -

227 ovec[i]|=ovec[i+1]>>(8-num%8); -

228

}

never executed: end of block

229 iv=&ovec[0]; -

230 c2l(iv,v0); -

231 c2l(iv,v1); -

232

}

never executed: end of block

233 d0^=ti[0]; -

234 d1^=ti[1]; -

235

l2cn(d0,d1,out,n);

never executed: end of block

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 never executed: case 3:

code before this statement never executed: case 2:

code before this statement never executed: case 1:

never executed: case 8:

never executed: case 7:

never executed: case 6:

never executed: case 5:

never executed: case 4:

never executed: case 3:

never executed: case 2:

never executed: case 1:

236 out+=n; -

237

}

never executed: end of block

238

}

never executed: end of block

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

240 l2c(v0,iv); -

241 l2c(v1,iv); -

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

243

}

never executed: end of block

244 -

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