1/* NOCW */
2#include <stdio.h>
3
4/* This version of crypt has been developed from my MIT compatible
5 * DES library.
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 than 8 bytes like HP-UX 10.x it used. The MAXPLEN
13 * definition is the maximum of length 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 */
23static unsigned const char con_salt[128]={
240xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,
250xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1,
260xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,
270xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,
280xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,
290xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x00,0x01,
300x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
310x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A,
320x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
330x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,
340x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,
350x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24,
360x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,
370x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,
380x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,
390x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,
40};
41
42static unsigned const char cov_2char[64]={
430x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
440x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
450x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
460x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
470x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
480x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
490x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
500x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
51};
52
53void fcrypt_body(DES_LONG *out,des_key_schedule ks,
54	DES_LONG Eswap0, DES_LONG Eswap1);
55
56char *des_crypt(const char *buf, const char *salt)
57	{
58	static char buff[14];
59
60#ifndef CHARSET_EBCDIC
61	return(des_fcrypt(buf,salt,buff));
62#else
63	char e_salt[2+1];
64	char e_buf[32+1];	/* replace 32 by 8 ? */
65	char *ret;
66
67	/* Copy at most 2 chars of salt */
68	if ((e_salt[0] = salt[0]) != '\0')
69	    e_salt[1] = salt[1];
70
71	/* Copy at most 32 chars of password */
72	strncpy (e_buf, buf, sizeof(e_buf));
73
74	/* Make sure we have a delimiter */
75	e_salt[sizeof(e_salt)-1] = e_buf[sizeof(e_buf)-1] = '\0';
76
77	/* Convert the e_salt to ASCII, as that's what des_fcrypt works on */
78	ebcdic2ascii(e_salt, e_salt, sizeof e_salt);
79
80	/* Convert the cleartext password to ASCII */
81	ebcdic2ascii(e_buf, e_buf, sizeof e_buf);
82
83	/* Encrypt it (from/to ASCII) */
84	ret = des_fcrypt(e_buf,e_salt,buff);
85
86	/* Convert the result back to EBCDIC */
87	ascii2ebcdic(ret, ret, strlen(ret));
88
89	return ret;
90#endif
91	}
92
93
94char *des_fcrypt(const char *buf, const char *salt, char *ret)
95	{
96	unsigned int i,j,x,y;
97	DES_LONG Eswap0,Eswap1;
98	DES_LONG out[2],ll;
99	des_cblock key;
100	des_key_schedule ks;
101	unsigned char bb[9];
102	unsigned char *b=bb;
103	unsigned char c,u;
104
105	/* eay 25/08/92
106	 * If you call crypt("pwd","*") as often happens when you
107	 * have * as the pwd field in /etc/passwd, the function
108	 * returns *\0XXXXXXXXX
109	 * The \0 makes the string look like * so the pwd "*" would
110	 * crypt to "*".  This was found when replacing the crypt in
111	 * our shared libraries.  People found that the disabled
112	 * accounts effectively had no passwd :-(. */
113#ifndef CHARSET_EBCDIC
114	x=ret[0]=((salt[0] == '\0')?'A':salt[0]);
115	Eswap0=con_salt[x]<<2;
116	x=ret[1]=((salt[1] == '\0')?'A':salt[1]);
117	Eswap1=con_salt[x]<<6;
118#else
119	x=ret[0]=((salt[0] == '\0')?os_toascii['A']:salt[0]);
120	Eswap0=con_salt[x]<<2;
121	x=ret[1]=((salt[1] == '\0')?os_toascii['A']:salt[1]);
122	Eswap1=con_salt[x]<<6;
123#endif
124
125/* EAY
126r=strlen(buf);
127r=(r+7)/8;
128*/
129	for (i=0; i<8; i++)
130		{
131		c= *(buf++);
132		if (!c) break;
133		key[i]=(c<<1);
134		}
135	for (; i<8; i++)
136		key[i]=0;
137
138	des_set_key_unchecked(&key,ks);
139	fcrypt_body(&(out[0]),ks,Eswap0,Eswap1);
140
141	ll=out[0]; l2c(ll,b);
142	ll=out[1]; l2c(ll,b);
143	y=0;
144	u=0x80;
145	bb[8]=0;
146	for (i=2; i<13; i++)
147		{
148		c=0;
149		for (j=0; j<6; j++)
150			{
151			c<<=1;
152			if (bb[y] & u) c|=1;
153			u>>=1;
154			if (!u)
155				{
156				y++;
157				u=0x80;
158				}
159			}
160		ret[i]=cov_2char[c];
161		}
162	ret[13]='\0';
163	return(ret);
164	}
165
166