Remove redundant declaration.
[openssl.git] / crypto / des / fcrypt.c
1 /* NOCW */
2 #include <stdio.h>
3 #ifdef _OSD_POSIX
4 #ifndef CHARSET_EBCDIC
5 #define CHARSET_EBCDIC 1
6 #endif
7 #endif
8 #ifdef CHARSET_EBCDIC
9 #include <openssl/ebcdic.h>
10 #endif
11
12 /* This version of crypt has been developed from my MIT compatible
13  * DES library.
14  * Eric Young (eay@cryptsoft.com)
15  */
16
17 /* Modification by Jens Kupferschmidt (Cu)
18  * I have included directive PARA for shared memory computers.
19  * I have included a directive LONGCRYPT to using this routine to cipher
20  * passwords with more then 8 bytes like HP-UX 10.x it used. The MAXPLEN
21  * definition is the maximum of length of password and can changed. I have
22  * defined 24.
23  */
24
25 #include "des_locl.h"
26
27 /* Added more values to handle illegal salt values the way normal
28  * crypt() implementations do.  The patch was sent by 
29  * Bjorn Gronvall <bg@sics.se>
30  */
31 static unsigned const char con_salt[128]={
32 0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,
33 0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1,
34 0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,
35 0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,
36 0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,
37 0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x00,0x01,
38 0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
39 0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A,
40 0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
41 0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,
42 0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,
43 0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24,
44 0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,
45 0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,
46 0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,
47 0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,
48 };
49
50 static unsigned const char cov_2char[64]={
51 0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
52 0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
53 0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
54 0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
55 0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
56 0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
57 0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
58 0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
59 };
60
61 char *DES_crypt(const char *buf, const char *salt)
62         {
63         static char buff[14];
64
65 #ifndef CHARSET_EBCDIC
66         return(DES_fcrypt(buf,salt,buff));
67 #else
68         char e_salt[2+1];
69         char e_buf[32+1];       /* replace 32 by 8 ? */
70         char *ret;
71
72         /* Copy at most 2 chars of salt */
73         if ((e_salt[0] = salt[0]) != '\0')
74             e_salt[1] = salt[1];
75
76         /* Copy at most 32 chars of password */
77         strncpy (e_buf, buf, sizeof(e_buf));
78
79         /* Make sure we have a delimiter */
80         e_salt[sizeof(e_salt)-1] = e_buf[sizeof(e_buf)-1] = '\0';
81
82         /* Convert the e_salt to ASCII, as that's what DES_fcrypt works on */
83         ebcdic2ascii(e_salt, e_salt, sizeof e_salt);
84
85         /* Convert the cleartext password to ASCII */
86         ebcdic2ascii(e_buf, e_buf, sizeof e_buf);
87
88         /* Encrypt it (from/to ASCII) */
89         ret = DES_fcrypt(e_buf,e_salt,buff);
90
91         /* Convert the result back to EBCDIC */
92         ascii2ebcdic(ret, ret, strlen(ret));
93         
94         return ret;
95 #endif
96         }
97
98
99 char *DES_fcrypt(const char *buf, const char *salt, char *ret)
100         {
101         unsigned int i,j,x,y;
102         DES_LONG Eswap0,Eswap1;
103         DES_LONG out[2],ll;
104         DES_cblock key;
105         DES_key_schedule ks;
106         unsigned char bb[9];
107         unsigned char *b=bb;
108         unsigned char c,u;
109
110         /* eay 25/08/92
111          * If you call crypt("pwd","*") as often happens when you
112          * have * as the pwd field in /etc/passwd, the function
113          * returns *\0XXXXXXXXX
114          * The \0 makes the string look like * so the pwd "*" would
115          * crypt to "*".  This was found when replacing the crypt in
116          * our shared libraries.  People found that the disabled
117          * accounts effectively had no passwd :-(. */
118 #ifndef CHARSET_EBCDIC
119         x=ret[0]=((salt[0] == '\0')?'A':salt[0]);
120         Eswap0=con_salt[x]<<2;
121         x=ret[1]=((salt[1] == '\0')?'A':salt[1]);
122         Eswap1=con_salt[x]<<6;
123 #else
124         x=ret[0]=((salt[0] == '\0')?os_toascii['A']:salt[0]);
125         Eswap0=con_salt[x]<<2;
126         x=ret[1]=((salt[1] == '\0')?os_toascii['A']:salt[1]);
127         Eswap1=con_salt[x]<<6;
128 #endif
129
130 /* EAY
131 r=strlen(buf);
132 r=(r+7)/8;
133 */
134         for (i=0; i<8; i++)
135                 {
136                 c= *(buf++);
137                 if (!c) break;
138                 key[i]=(c<<1);
139                 }
140         for (; i<8; i++)
141                 key[i]=0;
142
143         DES_set_key_unchecked(&key,&ks);
144         fcrypt_body(&(out[0]),&ks,Eswap0,Eswap1);
145
146         ll=out[0]; l2c(ll,b);
147         ll=out[1]; l2c(ll,b);
148         y=0;
149         u=0x80;
150         bb[8]=0;
151         for (i=2; i<13; i++)
152                 {
153                 c=0;
154                 for (j=0; j<6; j++)
155                         {
156                         c<<=1;
157                         if (bb[y] & u) c|=1;
158                         u>>=1;
159                         if (!u)
160                                 {
161                                 y++;
162                                 u=0x80;
163                                 }
164                         }
165                 ret[i]=cov_2char[c];
166                 }
167         ret[13]='\0';
168         return(ret);
169         }
170