Remove fips_constseg references.
[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 <openssl/crypto.h>
26 #include "des_locl.h"
27
28 /* Added more values to handle illegal salt values the way normal
29  * crypt() implementations do.  The patch was sent by 
30  * Bjorn Gronvall <bg@sics.se>
31  */
32 static unsigned const char con_salt[128]={
33 0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,
34 0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1,
35 0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,
36 0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,
37 0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,
38 0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x00,0x01,
39 0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
40 0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A,
41 0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
42 0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,
43 0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,
44 0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24,
45 0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,
46 0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,
47 0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,
48 0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,
49 };
50
51 static unsigned const char cov_2char[64]={
52 0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
53 0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
54 0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
55 0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
56 0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
57 0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
58 0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
59 0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
60 };
61
62 char *DES_crypt(const char *buf, const char *salt)
63         {
64         static char buff[14];
65
66 #ifndef CHARSET_EBCDIC
67         return(DES_fcrypt(buf,salt,buff));
68 #else
69         char e_salt[2+1];
70         char e_buf[32+1];       /* replace 32 by 8 ? */
71         char *ret;
72
73         /* Copy at most 2 chars of salt */
74         if ((e_salt[0] = salt[0]) != '\0')
75             e_salt[1] = salt[1];
76
77         /* Copy at most 32 chars of password */
78         strncpy (e_buf, buf, sizeof(e_buf));
79
80         /* Make sure we have a delimiter */
81         e_salt[sizeof(e_salt)-1] = e_buf[sizeof(e_buf)-1] = '\0';
82
83         /* Convert the e_salt to ASCII, as that's what DES_fcrypt works on */
84         ebcdic2ascii(e_salt, e_salt, sizeof e_salt);
85
86         /* Convert the cleartext password to ASCII */
87         ebcdic2ascii(e_buf, e_buf, sizeof e_buf);
88
89         /* Encrypt it (from/to ASCII) */
90         ret = DES_fcrypt(e_buf,e_salt,buff);
91
92         /* Convert the result back to EBCDIC */
93         ascii2ebcdic(ret, ret, strlen(ret));
94         
95         return ret;
96 #endif
97         }
98
99
100 char *DES_fcrypt(const char *buf, const char *salt, char *ret)
101         {
102         unsigned int i,j,x,y;
103         DES_LONG Eswap0,Eswap1;
104         DES_LONG out[2],ll;
105         DES_cblock key;
106         DES_key_schedule ks;
107         unsigned char bb[9];
108         unsigned char *b=bb;
109         unsigned char c,u;
110
111         /* eay 25/08/92
112          * If you call crypt("pwd","*") as often happens when you
113          * have * as the pwd field in /etc/passwd, the function
114          * returns *\0XXXXXXXXX
115          * The \0 makes the string look like * so the pwd "*" would
116          * crypt to "*".  This was found when replacing the crypt in
117          * our shared libraries.  People found that the disabled
118          * accounts effectively had no passwd :-(. */
119 #ifndef CHARSET_EBCDIC
120         x=ret[0]=((salt[0] == '\0')?'A':salt[0]);
121         Eswap0=con_salt[x]<<2;
122         x=ret[1]=((salt[1] == '\0')?'A':salt[1]);
123         Eswap1=con_salt[x]<<6;
124 #else
125         x=ret[0]=((salt[0] == '\0')?os_toascii['A']:salt[0]);
126         Eswap0=con_salt[x]<<2;
127         x=ret[1]=((salt[1] == '\0')?os_toascii['A']:salt[1]);
128         Eswap1=con_salt[x]<<6;
129 #endif
130
131 /* EAY
132 r=strlen(buf);
133 r=(r+7)/8;
134 */
135         for (i=0; i<8; i++)
136                 {
137                 c= *(buf++);
138                 if (!c) break;
139                 key[i]=(c<<1);
140                 }
141         for (; i<8; i++)
142                 key[i]=0;
143
144         DES_set_key_unchecked(&key,&ks);
145         fcrypt_body(&(out[0]),&ks,Eswap0,Eswap1);
146
147         ll=out[0]; l2c(ll,b);
148         ll=out[1]; l2c(ll,b);
149         y=0;
150         u=0x80;
151         bb[8]=0;
152         for (i=2; i<13; i++)
153                 {
154                 c=0;
155                 for (j=0; j<6; j++)
156                         {
157                         c<<=1;
158                         if (bb[y] & u) c|=1;
159                         u>>=1;
160                         if (!u)
161                                 {
162                                 y++;
163                                 u=0x80;
164                                 }
165                         }
166                 ret[i]=cov_2char[c];
167                 }
168         ret[13]='\0';
169         return(ret);
170         }
171