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[strongswan.git] / src / libfreeswan / libcrypto / oldlibdes / des / fcrypt.c
1 /* NOCW */
2
3 /* This version of crypt has been developed from my MIT compatable
4 * DES library.
5 * The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au
6 * Eric Young (eay@cryptsoft.com)
7 */
8
9 /* Modification by Jens Kupferschmidt (Cu)
10 * I have included directive PARA for shared memory computers.
11 * I have included a directive LONGCRYPT to using this routine to cipher
12 * passwords with more then 8 bytes like HP-UX 10.x it used. The MAXPLEN
13 * definition is the maximum of lenght of password and can changed. I have
14 * defined 24.
15 */
16
17 #include "des_locl.h"
18
19 /* Added more values to handle illegal salt values the way normal
20 * crypt() implementations do. The patch was sent by
21 * Bjorn Gronvall <bg@sics.se>
22 */
23 static unsigned const char con_salt[128]={
24 0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,
25 0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1,
26 0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,
27 0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,
28 0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,
29 0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x00,0x01,
30 0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
31 0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A,
32 0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
33 0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,
34 0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,
35 0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24,
36 0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,
37 0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,
38 0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,
39 0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,
40 };
41
42 static unsigned const char cov_2char[64]={
43 0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
44 0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
45 0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
46 0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
47 0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
48 0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
49 0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
50 0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
51 };
52
53 #ifndef NOPROTO
54 void fcrypt_body(DES_LONG *out,des_key_schedule ks,
55 DES_LONG Eswap0, DES_LONG Eswap1);
56
57 #ifdef PERL5
58 char *des_crypt(const char *buf,const char *salt);
59 #else
60 char *crypt(const char *buf,const char *salt);
61 #endif
62 #else
63 void fcrypt_body();
64 #ifdef PERL5
65 char *des_crypt();
66 #else
67 char *crypt();
68 #endif
69 #endif
70
71 #ifdef PERL5
72 char *des_crypt(buf,salt)
73 #else
74 char *crypt(buf,salt)
75 #endif
76 const char *buf;
77 const char *salt;
78 {
79 static char buff[14];
80
81 return(des_fcrypt(buf,salt,buff));
82 }
83
84
85 char *des_fcrypt(buf,salt,ret)
86 const char *buf;
87 const char *salt;
88 char *ret;
89 {
90 unsigned int i,j,x,y;
91 DES_LONG Eswap0,Eswap1;
92 DES_LONG out[2],ll;
93 des_cblock key;
94 des_key_schedule ks;
95 unsigned char bb[9];
96 unsigned char *b=bb;
97 unsigned char c,u;
98
99 /* eay 25/08/92
100 * If you call crypt("pwd","*") as often happens when you
101 * have * as the pwd field in /etc/passwd, the function
102 * returns *\0XXXXXXXXX
103 * The \0 makes the string look like * so the pwd "*" would
104 * crypt to "*". This was found when replacing the crypt in
105 * our shared libraries. People found that the disbled
106 * accounts effectivly had no passwd :-(. */
107 x=ret[0]=((salt[0] == '\0')?'A':salt[0]);
108 Eswap0=con_salt[x]<<2;
109 x=ret[1]=((salt[1] == '\0')?'A':salt[1]);
110 Eswap1=con_salt[x]<<6;
111
112 /* EAY
113 r=strlen(buf);
114 r=(r+7)/8;
115 */
116 for (i=0; i<8; i++)
117 {
118 c= *(buf++);
119 if (!c) break;
120 key[i]=(c<<1);
121 }
122 for (; i<8; i++)
123 key[i]=0;
124
125 des_set_key((des_cblock *)(key),ks);
126 fcrypt_body(&(out[0]),ks,Eswap0,Eswap1);
127
128 ll=out[0]; l2c(ll,b);
129 ll=out[1]; l2c(ll,b);
130 y=0;
131 u=0x80;
132 bb[8]=0;
133 for (i=2; i<13; i++)
134 {
135 c=0;
136 for (j=0; j<6; j++)
137 {
138 c<<=1;
139 if (bb[y] & u) c|=1;
140 u>>=1;
141 if (!u)
142 {
143 y++;
144 u=0x80;
145 }
146 }
147 ret[i]=cov_2char[c];
148 }
149 ret[13]='\0';
150 return(ret);
151 }
152