Make EVPs allocate context memory, thus making them extensible. Rationalise
[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 void fcrypt_body(DES_LONG *out,des_key_schedule *ks,
62                  DES_LONG Eswap0, DES_LONG Eswap1);
63
64 #if !defined(PERL5) && !defined(__FreeBSD__) && !defined(NeXT)
65 char *crypt(const char *buf, const char *salt)
66         {
67         return(des_crypt(buf, salt));
68         }
69 #endif
70
71 char *des_crypt(const char *buf, const char *salt)
72         {
73         static char buff[14];
74
75 #ifndef CHARSET_EBCDIC
76         return(des_fcrypt(buf,salt,buff));
77 #else
78         char e_salt[2+1];
79         char e_buf[32+1];       /* replace 32 by 8 ? */
80         char *ret;
81
82         /* Copy at most 2 chars of salt */
83         if ((e_salt[0] = salt[0]) != '\0')
84             e_salt[1] = salt[1];
85
86         /* Copy at most 32 chars of password */
87         strncpy (e_buf, buf, sizeof(e_buf));
88
89         /* Make sure we have a delimiter */
90         e_salt[sizeof(e_salt)-1] = e_buf[sizeof(e_buf)-1] = '\0';
91
92         /* Convert the e_salt to ASCII, as that's what des_fcrypt works on */
93         ebcdic2ascii(e_salt, e_salt, sizeof e_salt);
94
95         /* Convert the cleartext password to ASCII */
96         ebcdic2ascii(e_buf, e_buf, sizeof e_buf);
97
98         /* Encrypt it (from/to ASCII) */
99         ret = des_fcrypt(e_buf,e_salt,buff);
100
101         /* Convert the result back to EBCDIC */
102         ascii2ebcdic(ret, ret, strlen(ret));
103         
104         return ret;
105 #endif
106         }
107
108
109 char *des_fcrypt(const char *buf, const char *salt, char *ret)
110         {
111         unsigned int i,j,x,y;
112         DES_LONG Eswap0,Eswap1;
113         DES_LONG out[2],ll;
114         des_cblock key;
115         des_key_schedule ks;
116         unsigned char bb[9];
117         unsigned char *b=bb;
118         unsigned char c,u;
119
120         /* eay 25/08/92
121          * If you call crypt("pwd","*") as often happens when you
122          * have * as the pwd field in /etc/passwd, the function
123          * returns *\0XXXXXXXXX
124          * The \0 makes the string look like * so the pwd "*" would
125          * crypt to "*".  This was found when replacing the crypt in
126          * our shared libraries.  People found that the disabled
127          * accounts effectively had no passwd :-(. */
128 #ifndef CHARSET_EBCDIC
129         x=ret[0]=((salt[0] == '\0')?'A':salt[0]);
130         Eswap0=con_salt[x]<<2;
131         x=ret[1]=((salt[1] == '\0')?'A':salt[1]);
132         Eswap1=con_salt[x]<<6;
133 #else
134         x=ret[0]=((salt[0] == '\0')?os_toascii['A']:salt[0]);
135         Eswap0=con_salt[x]<<2;
136         x=ret[1]=((salt[1] == '\0')?os_toascii['A']:salt[1]);
137         Eswap1=con_salt[x]<<6;
138 #endif
139
140 /* EAY
141 r=strlen(buf);
142 r=(r+7)/8;
143 */
144         for (i=0; i<8; i++)
145                 {
146                 c= *(buf++);
147                 if (!c) break;
148                 key[i]=(c<<1);
149                 }
150         for (; i<8; i++)
151                 key[i]=0;
152
153         des_set_key_unchecked(&key,&ks);
154         fcrypt_body(&(out[0]),&ks,Eswap0,Eswap1);
155
156         ll=out[0]; l2c(ll,b);
157         ll=out[1]; l2c(ll,b);
158         y=0;
159         u=0x80;
160         bb[8]=0;
161         for (i=2; i<13; i++)
162                 {
163                 c=0;
164                 for (j=0; j<6; j++)
165                         {
166                         c<<=1;
167                         if (bb[y] & u) c|=1;
168                         u>>=1;
169                         if (!u)
170                                 {
171                                 y++;
172                                 u=0x80;
173                                 }
174                         }
175                 ret[i]=cov_2char[c];
176                 }
177         ret[13]='\0';
178         return(ret);
179         }
180