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str2key.c

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/home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/des/str2key.c

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1 /* $OpenBSD: str2key.c,v 1.10 2015/09/10 15:56:25 jsing 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 <openssl/crypto.h> -

60 #include "des_locl.h" -

61 -

62 void DES_string_to_key(const char *str, DES_cblock *key) -

63 { -

64 DES_key_schedule ks; -

65 int i,length; -

66 unsigned char j; -

67 -

68 memset(key,0,8); -

69 length=strlen(str); -

70 #ifdef OLD_STR_TO_KEY -

71 for (i=0; i<length; i++) -

72 (*key)[i%8]^=(str[i]<<1); -

73 #else /* MIT COMPATIBLE */ -

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

i<length	Description
TRUE	never evaluated
FALSE	never evaluated

75 { -

76 j=str[i]; -

if ((i%16) < 8)

(i%16) < 8	Description
TRUE	never evaluated
FALSE	never evaluated

(*key)[i%8]^=(j<<1);

never executed: (*key)[i%8]^=(j<<1);

79 else -

80 { -

81 /* Reverse the bit order 05/05/92 eay */ -

82 j=((j<<4)&0xf0)|((j>>4)&0x0f); -

83 j=((j<<2)&0xcc)|((j>>2)&0x33); -

84 j=((j<<1)&0xaa)|((j>>1)&0x55); -

85 (*key)[7-(i%8)]^=j; -

}

never executed: end of block

87 } -

88 #endif -

89 DES_set_odd_parity(key); -

90 #ifdef EXPERIMENTAL_STR_TO_STRONG_KEY -

91 if(DES_is_weak_key(key)) -

92 (*key)[7] ^= 0xF0; -

93 DES_set_key(key,&ks); -

94 #else -

95 DES_set_key_unchecked(key,&ks); -

96 #endif -

97 DES_cbc_cksum((const unsigned char*)str,key,length,&ks,key); -

98 explicit_bzero(&ks,sizeof(ks)); -

99 DES_set_odd_parity(key); -

100

}

never executed: end of block

101 -

102 void DES_string_to_2keys(const char *str, DES_cblock *key1, DES_cblock *key2) -

103 { -

104 DES_key_schedule ks; -

105 int i,length; -

106 unsigned char j; -

107 -

108 memset(key1,0,8); -

109 memset(key2,0,8); -

110 length=strlen(str); -

111 #ifdef OLD_STR_TO_KEY -

112 if (length <= 8) -

113 { -

114 for (i=0; i<length; i++) -

115 { -

116 (*key2)[i]=(*key1)[i]=(str[i]<<1); -

117 } -

118 } -

119 else -

120 { -

121 for (i=0; i<length; i++) -

122 { -

123 if ((i/8)&1) -

124 (*key2)[i%8]^=(str[i]<<1); -

125 else -

126 (*key1)[i%8]^=(str[i]<<1); -

127 } -

128 } -

129 #else /* MIT COMPATIBLE */ -

130

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

i<length	Description
TRUE	never evaluated
FALSE	never evaluated

131 { -

132 j=str[i]; -

133

if ((i%32) < 16)

(i%32) < 16	Description
TRUE	never evaluated
FALSE	never evaluated

134 { -

135

if ((i%16) < 8)

(i%16) < 8	Description
TRUE	never evaluated
FALSE	never evaluated

136

(*key1)[i%8]^=(j<<1);

never executed: (*key1)[i%8]^=(j<<1);

137 else -

138

(*key2)[i%8]^=(j<<1);

never executed: (*key2)[i%8]^=(j<<1);

139 } -

140 else -

141 { -

142 j=((j<<4)&0xf0)|((j>>4)&0x0f); -

143 j=((j<<2)&0xcc)|((j>>2)&0x33); -

144 j=((j<<1)&0xaa)|((j>>1)&0x55); -

145

if ((i%16) < 8)

(i%16) < 8	Description
TRUE	never evaluated
FALSE	never evaluated

146

(*key1)[7-(i%8)]^=j;

never executed: (*key1)[7-(i%8)]^=j;

147 else -

148

(*key2)[7-(i%8)]^=j;

never executed: (*key2)[7-(i%8)]^=j;

149 } -

150 } -

151

if (length <= 8) memcpy(key2,key1,8);

never executed: memcpy(key2,key1,8);

length <= 8	Description
TRUE	never evaluated
FALSE	never evaluated

152 #endif -

153 DES_set_odd_parity(key1); -

154 DES_set_odd_parity(key2); -

155 #ifdef EXPERIMENTAL_STR_TO_STRONG_KEY -

156 if(DES_is_weak_key(key1)) -

157 (*key1)[7] ^= 0xF0; -

158 DES_set_key(key1,&ks); -

159 #else -

160 DES_set_key_unchecked(key1,&ks); -

161 #endif -

162 DES_cbc_cksum((const unsigned char*)str,key1,length,&ks,key1); -

163 #ifdef EXPERIMENTAL_STR_TO_STRONG_KEY -

164 if(DES_is_weak_key(key2)) -

165 (*key2)[7] ^= 0xF0; -

166 DES_set_key(key2,&ks); -

167 #else -

168 DES_set_key_unchecked(key2,&ks); -

169 #endif -

170 DES_cbc_cksum((const unsigned char*)str,key2,length,&ks,key2); -

171 explicit_bzero(&ks,sizeof(ks)); -

172 DES_set_odd_parity(key1); -

173 DES_set_odd_parity(key2); -

174

}

never executed: end of block

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