1/*
2 * Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10/* NOCW */
11#include <stdio.h>
12#ifdef _OSD_POSIX
13# ifndef CHARSET_EBCDIC
14# define CHARSET_EBCDIC 1
15# endif
16#endif
17#ifdef CHARSET_EBCDIC
18# include <openssl/ebcdic.h>
19#endif
20
21#include <openssl/crypto.h>
22#include "des_local.h"
23
24/*
25 * Added more values to handle illegal salt values the way normal crypt()
26 * implementations do.
27 */
28static unsigned const char con_salt[128] = {
29 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9,
30 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1,
31 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9,
32 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1,
33 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9,
34 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0x00, 0x01,
35 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
36 0x0A, 0x0B, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
37 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12,
38 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A,
39 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22,
40 0x23, 0x24, 0x25, 0x20, 0x21, 0x22, 0x23, 0x24,
41 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C,
42 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34,
43 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C,
44 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44,
45};
46
47static unsigned const char cov_2char[64] = {
48 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
49 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
50 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
51 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
52 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
53 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
54 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
55 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
56};
57
58char *DES_crypt(const char *buf, const char *salt)
59{
60 static char buff[14];
61
62#ifndef CHARSET_EBCDIC
63 return DES_fcrypt(buf, salt, buff);
64#else
65 char e_salt[2 + 1];
66 char e_buf[32 + 1]; /* replace 32 by 8 ? */
67 char *ret;
68
69 if (salt[0] == '\0' || salt[1] == '\0')
70 return NULL;
71
72 /* Copy salt, convert to ASCII. */
73 e_salt[0] = salt[0];
74 e_salt[1] = salt[1];
75 e_salt[2] = '\0';
76 ebcdic2ascii(e_salt, e_salt, sizeof(e_salt));
77
78 /* Convert password to ASCII. */
79 OPENSSL_strlcpy(e_buf, buf, sizeof(e_buf));
80 ebcdic2ascii(e_buf, e_buf, sizeof(e_buf));
81
82 /* Encrypt it (from/to ASCII); if it worked, convert back. */
83 ret = DES_fcrypt(e_buf, e_salt, buff);
84 if (ret != NULL)
85 ascii2ebcdic(ret, ret, strlen(ret));
86
87 return ret;
88#endif
89}
90
91char *DES_fcrypt(const char *buf, const char *salt, char *ret)
92{
93 unsigned int i, j, x, y;
94 DES_LONG Eswap0, Eswap1;
95 DES_LONG out[2], ll;
96 DES_cblock key;
97 DES_key_schedule ks;
98 unsigned char bb[9];
99 unsigned char *b = bb;
100 unsigned char c, u;
101
102 x = ret[0] = salt[0];
103 if (x == 0 || x >= sizeof(con_salt))
104 return NULL;
105 Eswap0 = con_salt[x] << 2;
106 x = ret[1] = salt[1];
107 if (x == 0 || x >= sizeof(con_salt))
108 return NULL;
109 Eswap1 = con_salt[x] << 6;
110
111 /*
112 * EAY r=strlen(buf); r=(r+7)/8;
113 */
114 for (i = 0; i < 8; i++) {
115 c = *(buf++);
116 if (!c)
117 break;
118 key[i] = (c << 1);
119 }
120 for (; i < 8; i++)
121 key[i] = 0;
122
123 DES_set_key_unchecked(&key, &ks);
124 fcrypt_body(&(out[0]), &ks, Eswap0, Eswap1);
125
126 ll = out[0];
127 l2c(ll, b);
128 ll = out[1];
129 l2c(ll, b);
130 y = 0;
131 u = 0x80;
132 bb[8] = 0;
133 for (i = 2; i < 13; i++) {
134 c = 0;
135 for (j = 0; j < 6; j++) {
136 c <<= 1;
137 if (bb[y] & u)
138 c |= 1;
139 u >>= 1;
140 if (!u) {
141 y++;
142 u = 0x80;
143 }
144 }
145 ret[i] = cov_2char[c];
146 }
147 ret[13] = '\0';
148 return ret;
149}
150