1 /*
2 * Copyright 1998-2021 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 /*
11 * DES low level APIs are deprecated for public use, but still ok for internal
12 * use.
13 */
14 #include "internal/deprecated.h"
15
16 /* NOCW */
17 #include <stdio.h>
18 #ifdef _OSD_POSIX
19 # ifndef CHARSET_EBCDIC
20 # define CHARSET_EBCDIC 1
21 # endif
22 #endif
23 #ifdef CHARSET_EBCDIC
24 # include <openssl/ebcdic.h>
25 #endif
26
27 #include <openssl/crypto.h>
28 #include "des_local.h"
29
30 /*
31 * Added more values to handle illegal salt values the way normal crypt()
32 * implementations do.
33 */
34 static const unsigned char con_salt[128] = {
35 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9,
36 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1,
37 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9,
38 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1,
39 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9,
40 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0x00, 0x01,
41 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
42 0x0A, 0x0B, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
43 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12,
44 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A,
45 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22,
46 0x23, 0x24, 0x25, 0x20, 0x21, 0x22, 0x23, 0x24,
47 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C,
48 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34,
49 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C,
50 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44,
51 };
52
53 static const unsigned char cov_2char[64] = {
54 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
55 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
56 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
57 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
58 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
59 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
60 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
61 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
62 };
63
DES_crypt(const char * buf,const char * salt)64 char *DES_crypt(const char *buf, const char *salt)
65 {
66 static char buff[14];
67
68 #ifndef CHARSET_EBCDIC
69 return DES_fcrypt(buf, salt, buff);
70 #else
71 char e_salt[2 + 1];
72 char e_buf[32 + 1]; /* replace 32 by 8 ? */
73 char *ret;
74
75 if (salt[0] == '\0' || salt[1] == '\0')
76 return NULL;
77
78 /* Copy salt, convert to ASCII. */
79 e_salt[0] = salt[0];
80 e_salt[1] = salt[1];
81 e_salt[2] = '\0';
82 ebcdic2ascii(e_salt, e_salt, sizeof(e_salt));
83
84 /* Convert password to ASCII. */
85 OPENSSL_strlcpy(e_buf, buf, sizeof(e_buf));
86 ebcdic2ascii(e_buf, e_buf, sizeof(e_buf));
87
88 /* Encrypt it (from/to ASCII); if it worked, convert back. */
89 ret = DES_fcrypt(e_buf, e_salt, buff);
90 if (ret != NULL)
91 ascii2ebcdic(ret, ret, strlen(ret));
92
93 return ret;
94 #endif
95 }
96
DES_fcrypt(const char * buf,const char * salt,char * ret)97 char *DES_fcrypt(const char *buf, const char *salt, char *ret)
98 {
99 unsigned int i, j, x, y;
100 DES_LONG Eswap0, Eswap1;
101 DES_LONG out[2], ll;
102 DES_cblock key;
103 DES_key_schedule ks;
104 unsigned char bb[9];
105 unsigned char *b = bb;
106 unsigned char c, u;
107
108 x = ret[0] = salt[0];
109 if (x == 0 || x >= sizeof(con_salt))
110 return NULL;
111 Eswap0 = con_salt[x] << 2;
112 x = ret[1] = salt[1];
113 if (x == 0 || x >= sizeof(con_salt))
114 return NULL;
115 Eswap1 = con_salt[x] << 6;
116
117 /*
118 * EAY r=strlen(buf); r=(r+7)/8;
119 */
120 for (i = 0; i < 8; i++) {
121 c = *(buf++);
122 if (!c)
123 break;
124 key[i] = (c << 1);
125 }
126 for (; i < 8; i++)
127 key[i] = 0;
128
129 DES_set_key_unchecked(&key, &ks);
130 fcrypt_body(&(out[0]), &ks, Eswap0, Eswap1);
131
132 ll = out[0];
133 l2c(ll, b);
134 ll = out[1];
135 l2c(ll, b);
136 y = 0;
137 u = 0x80;
138 bb[8] = 0;
139 for (i = 2; i < 13; i++) {
140 c = 0;
141 for (j = 0; j < 6; j++) {
142 c <<= 1;
143 if (bb[y] & u)
144 c |= 1;
145 u >>= 1;
146 if (!u) {
147 y++;
148 u = 0x80;
149 }
150 }
151 ret[i] = cov_2char[c];
152 }
153 ret[13] = '\0';
154 return ret;
155 }
156