/* $OpenBSD: des_fcrypt.c,v 1.5 2025/07/27 13:26:24 jsing Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <stdio.h> /* This version of crypt has been developed from my MIT compatible * DES library. * Eric Young (eay@cryptsoft.com) */ /* Modification by Jens Kupferschmidt (Cu) * I have included directive PARA for shared memory computers. * I have included a directive LONGCRYPT to using this routine to cipher * passwords with more than 8 bytes like HP-UX 10.x it used. The MAXPLEN * definition is the maximum of length of password and can changed. I have * defined 24. */ #define DES_FCRYPT #include "des_local.h" #undef DES_FCRYPT #undef PERM_OP #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)), \ (b)^=(t), \ (a)^=((t)<<(n))) #undef HPERM_OP #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)), \ (a)=(a)^(t)^(t>>(16-(n)))) \ static void fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0, DES_LONG Eswap1) { DES_LONG l, r, t, u; DES_LONG *s; DES_LONG E0, E1; int i, j; l = 0; r = 0; s = (DES_LONG *)ks; E0 = Eswap0; E1 = Eswap1; for (j = 0; j < 25; j++) { for (i = 0; i < 32; i += 8) { D_ENCRYPT(l, r, i + 0); D_ENCRYPT(r, l, i + 2); D_ENCRYPT(l, r, i + 4); D_ENCRYPT(r, l, i + 6); } t = l; l = r; r = t; } l = ROTATE(l, 3) & 0xffffffffL; r = ROTATE(r, 3) & 0xffffffffL; PERM_OP(l, r, t, 1, 0x55555555L); PERM_OP(r, l, t, 8, 0x00ff00ffL); PERM_OP(l, r, t, 2, 0x33333333L); PERM_OP(r, l, t, 16, 0x0000ffffL); PERM_OP(l, r, t, 4, 0x0f0f0f0fL); out[0] = r; out[1] = l; } /* Added more values to handle illegal salt values the way normal * crypt() implementations do. The patch was sent by * Bjorn Gronvall <bg@sics.se> */ static unsigned const char con_salt[128] = { 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F, 0x40, 0x41, 0x42, 0x43, 0x44, }; static unsigned const char cov_2char[64] = { 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A }; char * DES_crypt(const char *buf, const char *salt) { static char buff[14]; return (DES_fcrypt(buf, salt, buff)); } LCRYPTO_ALIAS(DES_crypt); char * DES_fcrypt(const char *buf, const char *salt, char *ret) { unsigned int i, j, x, y; DES_LONG Eswap0, Eswap1; DES_LONG out[2], ll; DES_cblock key; DES_key_schedule ks; unsigned char bb[9]; unsigned char *b = bb; unsigned char c, u; /* eay 25/08/92 * If you call crypt("pwd","*") as often happens when you * have * as the pwd field in /etc/passwd, the function * returns *\0xxxxxxxxx * The \0 makes the string look like * so the pwd "*" would * crypt to "*". This was found when replacing the crypt in * our shared libraries. People found that the disabled * accounts effectively had no passwd :-(. */ x = ret[0] = ((salt[0] == '\0') ? 'A' : salt[0]); Eswap0 = con_salt[x] << 2; x = ret[1] = ((salt[1] == '\0') ? 'A' : salt[1]); Eswap1 = con_salt[x] << 6; /* EAY r=strlen(buf); r=(r+7)/8; */ for (i = 0; i < 8; i++) { c = *(buf++); if (!c) break; key[i] = (c << 1); } for (; i < 8; i++) key[i] = 0; DES_set_key_unchecked(&key, &ks); fcrypt_body(&(out[0]), &ks, Eswap0, Eswap1); ll = out[0]; l2c(ll, b); ll = out[1]; l2c(ll, b); y = 0; u = 0x80; bb[8] = 0; for (i = 2; i < 13; i++) { c = 0; for (j = 0; j < 6; j++) { c <<= 1; if (bb[y] & u) c |= 1; u >>= 1; if (!u) { y++; u = 0x80; } } ret[i] = cov_2char[c]; } ret[13] = '\0'; return (ret); } LCRYPTO_ALIAS(DES_fcrypt);
