Edit
IABSD.fr/src/lib/libcrypto/idea/idea_local.h
beck
- lib/libcrypto/idea/idea_local.h
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/* $OpenBSD: idea_local.h,v 1.2 2023/07/07 12:51:58 beck 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.] */ /* The new form of this macro (check if the a*b == 0) was suggested by * Colin Plumb <colin@nyx10.cs.du.edu> */ /* Removal of the inner if from from Wei Dai 24/4/96 */ #define idea_mul(r,a,b,ul) \ ul=(unsigned long)a*b; \ if (ul != 0) \ { \ r=(ul&0xffff)-(ul>>16); \ r-=((r)>>16); \ } \ else \ r=(-(int)a-b+1); /* assuming a or b is 0 and in range */ /* 7/12/95 - Many thanks to Rhys Weatherley <rweather@us.oracle.com> * for pointing out that I was assuming little endian * byte order for all quantities what idea * actually used bigendian. No where in the spec does it mention * this, it is all in terms of 16 bit numbers and even the example * does not use byte streams for the input example :-(. * If you byte swap each pair of input, keys and iv, the functions * would produce the output as the old version :-(. */ /* NOTE - c is not incremented as per n2l */ #define n2ln(c,l1,l2,n) { \ c+=n; \ l1=l2=0; \ switch (n) { \ case 8: l2 =((unsigned long)(*(--(c)))) ; \ case 7: l2|=((unsigned long)(*(--(c))))<< 8; \ case 6: l2|=((unsigned long)(*(--(c))))<<16; \ case 5: l2|=((unsigned long)(*(--(c))))<<24; \ case 4: l1 =((unsigned long)(*(--(c)))) ; \ case 3: l1|=((unsigned long)(*(--(c))))<< 8; \ case 2: l1|=((unsigned long)(*(--(c))))<<16; \ case 1: l1|=((unsigned long)(*(--(c))))<<24; \ } \ } /* NOTE - c is not incremented as per l2n */ #define l2nn(l1,l2,c,n) { \ c+=n; \ switch (n) { \ case 8: *(--(c))=(unsigned char)(((l2) )&0xff);\ case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff);\ case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff);\ case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff);\ case 4: *(--(c))=(unsigned char)(((l1) )&0xff);\ case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff);\ case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff);\ case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff);\ } \ } #undef n2l #define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \ l|=((unsigned long)(*((c)++)))<<16L, \ l|=((unsigned long)(*((c)++)))<< 8L, \ l|=((unsigned long)(*((c)++)))) #undef l2n #define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \ *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ *((c)++)=(unsigned char)(((l) )&0xff)) #undef s2n #define s2n(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \ *((c)++)=(unsigned char)(((l)>> 8L)&0xff)) #undef n2s #define n2s(c,l) (l =((IDEA_INT)(*((c)++)))<< 8L, \ l|=((IDEA_INT)(*((c)++))) ) #define E_IDEA(num) \ x1&=0xffff; \ idea_mul(x1,x1,*p,ul); p++; \ x2+= *(p++); \ x3+= *(p++); \ x4&=0xffff; \ idea_mul(x4,x4,*p,ul); p++; \ t0=(x1^x3)&0xffff; \ idea_mul(t0,t0,*p,ul); p++; \ t1=(t0+(x2^x4))&0xffff; \ idea_mul(t1,t1,*p,ul); p++; \ t0+=t1; \ x1^=t1; \ x4^=t0; \ ul=x2^t0; /* do the swap to x3 */ \ x2=x3^t1; \ x3=ul;