sl@0: /* crypto/des/qud_cksm.c */ sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) sl@0: * All rights reserved. sl@0: * sl@0: * This package is an SSL implementation written sl@0: * by Eric Young (eay@cryptsoft.com). sl@0: * The implementation was written so as to conform with Netscapes SSL. sl@0: * sl@0: * This library is free for commercial and non-commercial use as long as sl@0: * the following conditions are aheared to. The following conditions sl@0: * apply to all code found in this distribution, be it the RC4, RSA, sl@0: * lhash, DES, etc., code; not just the SSL code. The SSL documentation sl@0: * included with this distribution is covered by the same copyright terms sl@0: * except that the holder is Tim Hudson (tjh@cryptsoft.com). sl@0: * sl@0: * Copyright remains Eric Young's, and as such any Copyright notices in sl@0: * the code are not to be removed. sl@0: * If this package is used in a product, Eric Young should be given attribution sl@0: * as the author of the parts of the library used. sl@0: * This can be in the form of a textual message at program startup or sl@0: * in documentation (online or textual) provided with the package. sl@0: * sl@0: * Redistribution and use in source and binary forms, with or without sl@0: * modification, are permitted provided that the following conditions sl@0: * are met: sl@0: * 1. Redistributions of source code must retain the copyright sl@0: * notice, this list of conditions and the following disclaimer. sl@0: * 2. Redistributions in binary form must reproduce the above copyright sl@0: * notice, this list of conditions and the following disclaimer in the sl@0: * documentation and/or other materials provided with the distribution. sl@0: * 3. All advertising materials mentioning features or use of this software sl@0: * must display the following acknowledgement: sl@0: * "This product includes cryptographic software written by sl@0: * Eric Young (eay@cryptsoft.com)" sl@0: * The word 'cryptographic' can be left out if the rouines from the library sl@0: * being used are not cryptographic related :-). sl@0: * 4. If you include any Windows specific code (or a derivative thereof) from sl@0: * the apps directory (application code) you must include an acknowledgement: sl@0: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" sl@0: * sl@0: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND sl@0: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE sl@0: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE sl@0: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE sl@0: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL sl@0: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS sl@0: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) sl@0: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT sl@0: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY sl@0: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF sl@0: * SUCH DAMAGE. sl@0: * sl@0: * The licence and distribution terms for any publically available version or sl@0: * derivative of this code cannot be changed. i.e. this code cannot simply be sl@0: * copied and put under another distribution licence sl@0: * [including the GNU Public Licence.] sl@0: */ sl@0: sl@0: /* From "Message Authentication" R.R. Jueneman, S.M. Matyas, C.H. Meyer sl@0: * IEEE Communications Magazine Sept 1985 Vol. 23 No. 9 p 29-40 sl@0: * This module in only based on the code in this paper and is sl@0: * almost definitely not the same as the MIT implementation. sl@0: */ sl@0: #include "des_locl.h" sl@0: sl@0: /* bug fix for dos - 7/6/91 - Larry hughes@logos.ucs.indiana.edu */ sl@0: #define Q_B0(a) (((DES_LONG)(a))) sl@0: #define Q_B1(a) (((DES_LONG)(a))<<8) sl@0: #define Q_B2(a) (((DES_LONG)(a))<<16) sl@0: #define Q_B3(a) (((DES_LONG)(a))<<24) sl@0: sl@0: /* used to scramble things a bit */ sl@0: /* Got the value MIT uses via brute force :-) 2/10/90 eay */ sl@0: #define NOISE ((DES_LONG)83653421L) sl@0: sl@0: EXPORT_C DES_LONG DES_quad_cksum(const unsigned char *input, DES_cblock output[], sl@0: long length, int out_count, DES_cblock *seed) sl@0: { sl@0: DES_LONG z0,z1,t0,t1; sl@0: int i; sl@0: long l; sl@0: const unsigned char *cp; sl@0: #ifdef _CRAY sl@0: struct lp_st { int a:32; int b:32; } *lp; sl@0: #else sl@0: DES_LONG *lp; sl@0: #endif sl@0: sl@0: if (out_count < 1) out_count=1; sl@0: #ifdef _CRAY sl@0: lp = (struct lp_st *) &(output[0])[0]; sl@0: #else sl@0: lp = (DES_LONG *) &(output[0])[0]; sl@0: #endif sl@0: sl@0: z0=Q_B0((*seed)[0])|Q_B1((*seed)[1])|Q_B2((*seed)[2])|Q_B3((*seed)[3]); sl@0: z1=Q_B0((*seed)[4])|Q_B1((*seed)[5])|Q_B2((*seed)[6])|Q_B3((*seed)[7]); sl@0: sl@0: for (i=0; ((i<4)&&(i 0) sl@0: { sl@0: if (l > 1) sl@0: { sl@0: t0= (DES_LONG)(*(cp++)); sl@0: t0|=(DES_LONG)Q_B1(*(cp++)); sl@0: l--; sl@0: } sl@0: else sl@0: t0= (DES_LONG)(*(cp++)); sl@0: l--; sl@0: /* add */ sl@0: t0+=z0; sl@0: t0&=0xffffffffL; sl@0: t1=z1; sl@0: /* square, well sort of square */ sl@0: z0=((((t0*t0)&0xffffffffL)+((t1*t1)&0xffffffffL)) sl@0: &0xffffffffL)%0x7fffffffL; sl@0: z1=((t0*((t1+NOISE)&0xffffffffL))&0xffffffffL)%0x7fffffffL; sl@0: } sl@0: if (lp != NULL) sl@0: { sl@0: /* The MIT library assumes that the checksum is sl@0: * composed of 2*out_count 32 bit ints */ sl@0: #ifdef _CRAY sl@0: (*lp).a = z0; sl@0: (*lp).b = z1; sl@0: lp++; sl@0: #else sl@0: *lp++ = z0; sl@0: *lp++ = z1; sl@0: #endif sl@0: } sl@0: } sl@0: return(z0); sl@0: } sl@0: