openssl/crypto/des/ede_cbcm_enc.c - Issue 2072073002: Delete bundled copy of OpenSSL and replace with README.

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Issue 2072073002: Delete bundled copy of OpenSSL and replace with README. (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master

Patch Set: Delete bundled copy of OpenSSL and replace with README. Created 4 years, 6 months ago

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1 /* ede_cbcm_enc.c */

2 /* Written by Ben Laurie <ben@algroup.co.uk> for the OpenSSL

3 * project 13 Feb 1999.

4 */

5 /* ====================================================================

6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.

7 *

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

9 * modification, are permitted provided that the following conditions

10 * are met:

11 *

12 * 1. Redistributions of source code must retain the above copyright

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

14 *

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

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

17 * the documentation and/or other materials provided with the

18 * distribution.

19 *

20 * 3. All advertising materials mentioning features or use of this

21 * software must display the following acknowledgment:

22 * "This product includes software developed by the OpenSSL Project

23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"

24 *

25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

26 * endorse or promote products derived from this software without

27 * prior written permission. For written permission, please contact

28 * licensing@OpenSSL.org.

29 *

30 * 5. Products derived from this software may not be called "OpenSSL"

31 * nor may "OpenSSL" appear in their names without prior written

32 * permission of the OpenSSL Project.

33 *

34 * 6. Redistributions of any form whatsoever must retain the following

35 * acknowledgment:

36 * "This product includes software developed by the OpenSSL Project

37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"

38 *

39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR

43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

50 * OF THE POSSIBILITY OF SUCH DAMAGE.

51 * ====================================================================

52 *

53 * This product includes cryptographic software written by Eric Young

54 * (eay@cryptsoft.com). This product includes software written by Tim

55 * Hudson (tjh@cryptsoft.com).

56 *

57 */

58

59 /*

60

61 This is an implementation of Triple DES Cipher Block Chaining with Output

62 Feedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom).

63

64 Note that there is a known attack on this by Biham and Knudsen but it takes

65 a lot of work:

66

67 http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz

68

69 */

70

71 #include <openssl/opensslconf.h> /* To see if OPENSSL_NO_DESCBCM is defined */

72

73 #ifndef OPENSSL_NO_DESCBCM

74 #include "des_locl.h"

75

76 void DES_ede3_cbcm_encrypt(const unsigned char in, unsigned char out,

77 long length, DES_key_schedule ks1, DES_key_schedule ks2,

78 DES_key_schedule ks3, DES_cblock ivec1, DES_cblock *ivec2,

79 int enc)

80 {

81 register DES_LONG tin0,tin1;

82 register DES_LONG tout0,tout1,xor0,xor1,m0,m1;

83 register long l=length;

84 DES_LONG tin[2];

85 unsigned char iv1,iv2;

86

87 iv1 = &(*ivec1)[0];

88 iv2 = &(*ivec2)[0];

89

90 if (enc)

91 {

92 c2l(iv1,m0);

93 c2l(iv1,m1);

94 c2l(iv2,tout0);

95 c2l(iv2,tout1);

96 for (l-=8; l>=-7; l-=8)

97 {

98 tin[0]=m0;

99 tin[1]=m1;

100 DES_encrypt1(tin,ks3,1);

101 m0=tin[0];

102 m1=tin[1];

103

104 if(l < 0)

105 {

106 c2ln(in,tin0,tin1,l+8);

107 }

108 else

109 {

110 c2l(in,tin0);

111 c2l(in,tin1);

112 }

113 tin0^=tout0;

114 tin1^=tout1;

115

116 tin[0]=tin0;

117 tin[1]=tin1;

118 DES_encrypt1(tin,ks1,1);

119 tin[0]^=m0;

120 tin[1]^=m1;

121 DES_encrypt1(tin,ks2,0);

122 tin[0]^=m0;

123 tin[1]^=m1;

124 DES_encrypt1(tin,ks1,1);

125 tout0=tin[0];

126 tout1=tin[1];

127

128 l2c(tout0,out);

129 l2c(tout1,out);

130 }

131 iv1=&(*ivec1)[0];

132 l2c(m0,iv1);

133 l2c(m1,iv1);

134

135 iv2=&(*ivec2)[0];

136 l2c(tout0,iv2);

137 l2c(tout1,iv2);

138 }

139 else

140 {

141 register DES_LONG t0,t1;

142

143 c2l(iv1,m0);

144 c2l(iv1,m1);

145 c2l(iv2,xor0);

146 c2l(iv2,xor1);

147 for (l-=8; l>=-7; l-=8)

148 {

149 tin[0]=m0;

150 tin[1]=m1;

151 DES_encrypt1(tin,ks3,1);

152 m0=tin[0];

153 m1=tin[1];

154

155 c2l(in,tin0);

156 c2l(in,tin1);

157

158 t0=tin0;

159 t1=tin1;

160

161 tin[0]=tin0;

162 tin[1]=tin1;

163 DES_encrypt1(tin,ks1,0);

164 tin[0]^=m0;

165 tin[1]^=m1;

166 DES_encrypt1(tin,ks2,1);

167 tin[0]^=m0;

168 tin[1]^=m1;

169 DES_encrypt1(tin,ks1,0);

170 tout0=tin[0];

171 tout1=tin[1];

172

173 tout0^=xor0;

174 tout1^=xor1;

175 if(l < 0)

176 {

177 l2cn(tout0,tout1,out,l+8);

178 }

179 else

180 {

181 l2c(tout0,out);

182 l2c(tout1,out);

183 }

184 xor0=t0;

185 xor1=t1;

186 }

187

188 iv1=&(*ivec1)[0];

189 l2c(m0,iv1);

190 l2c(m1,iv1);

191

192 iv2=&(*ivec2)[0];

193 l2c(xor0,iv2);

194 l2c(xor1,iv2);

195 }

196 tin0=tin1=tout0=tout1=xor0=xor1=0;

197 tin[0]=tin[1]=0;

198 }

199 #endif

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