Annotation of src/usr.bin/ssh/bf_skey.c, Revision 1.1
1.1 ! deraadt 1: /* crypto/bf/bf_skey.c */
! 2: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
! 3: * All rights reserved.
! 4: *
! 5: * This package is an SSL implementation written
! 6: * by Eric Young (eay@cryptsoft.com).
! 7: * The implementation was written so as to conform with Netscapes SSL.
! 8: *
! 9: * This library is free for commercial and non-commercial use as long as
! 10: * the following conditions are aheared to. The following conditions
! 11: * apply to all code found in this distribution, be it the RC4, RSA,
! 12: * lhash, DES, etc., code; not just the SSL code. The SSL documentation
! 13: * included with this distribution is covered by the same copyright terms
! 14: * except that the holder is Tim Hudson (tjh@cryptsoft.com).
! 15: *
! 16: * Copyright remains Eric Young's, and as such any Copyright notices in
! 17: * the code are not to be removed.
! 18: * If this package is used in a product, Eric Young should be given attribution
! 19: * as the author of the parts of the library used.
! 20: * This can be in the form of a textual message at program startup or
! 21: * in documentation (online or textual) provided with the package.
! 22: *
! 23: * Redistribution and use in source and binary forms, with or without
! 24: * modification, are permitted provided that the following conditions
! 25: * are met:
! 26: * 1. Redistributions of source code must retain the copyright
! 27: * notice, this list of conditions and the following disclaimer.
! 28: * 2. Redistributions in binary form must reproduce the above copyright
! 29: * notice, this list of conditions and the following disclaimer in the
! 30: * documentation and/or other materials provided with the distribution.
! 31: * 3. All advertising materials mentioning features or use of this software
! 32: * must display the following acknowledgement:
! 33: * "This product includes cryptographic software written by
! 34: * Eric Young (eay@cryptsoft.com)"
! 35: * The word 'cryptographic' can be left out if the rouines from the library
! 36: * being used are not cryptographic related :-).
! 37: * 4. If you include any Windows specific code (or a derivative thereof) from
! 38: * the apps directory (application code) you must include an acknowledgement:
! 39: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
! 40: *
! 41: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
! 42: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 43: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 44: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 45: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 46: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 47: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 48: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 49: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 50: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 51: * SUCH DAMAGE.
! 52: *
! 53: * The licence and distribution terms for any publically available version or
! 54: * derivative of this code cannot be changed. i.e. this code cannot simply be
! 55: * copied and put under another distribution licence
! 56: * [including the GNU Public Licence.]
! 57: */
! 58:
! 59: #include <stdio.h>
! 60: #include <string.h>
! 61: #include "blowfish.h"
! 62: #include "bf_locl.h"
! 63: #include "bf_pi.h"
! 64:
! 65: void BF_set_key(key,len,data)
! 66: BF_KEY *key;
! 67: int len;
! 68: unsigned char *data;
! 69: {
! 70: int i;
! 71: BF_LONG *p,ri,in[2];
! 72: unsigned char *d,*end;
! 73:
! 74:
! 75: memcpy((char *)key,(char *)&bf_init,sizeof(BF_KEY));
! 76: p=key->P;
! 77:
! 78: if (len > ((BF_ROUNDS+2)*4)) len=(BF_ROUNDS+2)*4;
! 79:
! 80: d=data;
! 81: end= &(data[len]);
! 82: for (i=0; i<(BF_ROUNDS+2); i++)
! 83: {
! 84: ri= *(d++);
! 85: if (d >= end) d=data;
! 86:
! 87: ri<<=8;
! 88: ri|= *(d++);
! 89: if (d >= end) d=data;
! 90:
! 91: ri<<=8;
! 92: ri|= *(d++);
! 93: if (d >= end) d=data;
! 94:
! 95: ri<<=8;
! 96: ri|= *(d++);
! 97: if (d >= end) d=data;
! 98:
! 99: p[i]^=ri;
! 100: }
! 101:
! 102: in[0]=0L;
! 103: in[1]=0L;
! 104: for (i=0; i<(BF_ROUNDS+2); i+=2)
! 105: {
! 106: BF_encrypt(in,key);
! 107: p[i ]=in[0];
! 108: p[i+1]=in[1];
! 109: }
! 110:
! 111: p=key->S;
! 112: for (i=0; i<4*256; i+=2)
! 113: {
! 114: BF_encrypt(in,key);
! 115: p[i ]=in[0];
! 116: p[i+1]=in[1];
! 117: }
! 118: }
! 119: