Eneboo - Documentación para desarrolladores
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00001 /* crypto/rc2/rc2_locl.h */ 00002 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 00003 * All rights reserved. 00004 * 00005 * This package is an SSL implementation written 00006 * by Eric Young (eay@cryptsoft.com). 00007 * The implementation was written so as to conform with Netscapes SSL. 00008 * 00009 * This library is free for commercial and non-commercial use as long as 00010 * the following conditions are aheared to. The following conditions 00011 * apply to all code found in this distribution, be it the RC4, RSA, 00012 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 00013 * included with this distribution is covered by the same copyright terms 00014 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 00015 * 00016 * Copyright remains Eric Young's, and as such any Copyright notices in 00017 * the code are not to be removed. 00018 * If this package is used in a product, Eric Young should be given attribution 00019 * as the author of the parts of the library used. 00020 * This can be in the form of a textual message at program startup or 00021 * in documentation (online or textual) provided with the package. 00022 * 00023 * Redistribution and use in source and binary forms, with or without 00024 * modification, are permitted provided that the following conditions 00025 * are met: 00026 * 1. Redistributions of source code must retain the copyright 00027 * notice, this list of conditions and the following disclaimer. 00028 * 2. Redistributions in binary form must reproduce the above copyright 00029 * notice, this list of conditions and the following disclaimer in the 00030 * documentation and/or other materials provided with the distribution. 00031 * 3. All advertising materials mentioning features or use of this software 00032 * must display the following acknowledgement: 00033 * "This product includes cryptographic software written by 00034 * Eric Young (eay@cryptsoft.com)" 00035 * The word 'cryptographic' can be left out if the rouines from the library 00036 * being used are not cryptographic related :-). 00037 * 4. If you include any Windows specific code (or a derivative thereof) from 00038 * the apps directory (application code) you must include an acknowledgement: 00039 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 00040 * 00041 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 00042 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00043 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00044 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 00045 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00046 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00047 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00048 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00049 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00050 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00051 * SUCH DAMAGE. 00052 * 00053 * The licence and distribution terms for any publically available version or 00054 * derivative of this code cannot be changed. i.e. this code cannot simply be 00055 * copied and put under another distribution licence 00056 * [including the GNU Public Licence.] 00057 */ 00058 00059 #undef c2l 00060 #define c2l(c,l) (l =((unsigned long)(*((c)++))) , \ 00061 l|=((unsigned long)(*((c)++)))<< 8L, \ 00062 l|=((unsigned long)(*((c)++)))<<16L, \ 00063 l|=((unsigned long)(*((c)++)))<<24L) 00064 00065 /* NOTE - c is not incremented as per c2l */ 00066 #undef c2ln 00067 #define c2ln(c,l1,l2,n) { \ 00068 c+=n; \ 00069 l1=l2=0; \ 00070 switch (n) { \ 00071 case 8: l2 =((unsigned long)(*(--(c))))<<24L; \ 00072 case 7: l2|=((unsigned long)(*(--(c))))<<16L; \ 00073 case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \ 00074 case 5: l2|=((unsigned long)(*(--(c)))); \ 00075 case 4: l1 =((unsigned long)(*(--(c))))<<24L; \ 00076 case 3: l1|=((unsigned long)(*(--(c))))<<16L; \ 00077 case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \ 00078 case 1: l1|=((unsigned long)(*(--(c)))); \ 00079 } \ 00080 } 00081 00082 #undef l2c 00083 #define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \ 00084 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ 00085 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ 00086 *((c)++)=(unsigned char)(((l)>>24L)&0xff)) 00087 00088 /* NOTE - c is not incremented as per l2c */ 00089 #undef l2cn 00090 #define l2cn(l1,l2,c,n) { \ 00091 c+=n; \ 00092 switch (n) { \ 00093 case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \ 00094 case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \ 00095 case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \ 00096 case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \ 00097 case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \ 00098 case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \ 00099 case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \ 00100 case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \ 00101 } \ 00102 } 00103 00104 /* NOTE - c is not incremented as per n2l */ 00105 #define n2ln(c,l1,l2,n) { \ 00106 c+=n; \ 00107 l1=l2=0; \ 00108 switch (n) { \ 00109 case 8: l2 =((unsigned long)(*(--(c)))) ; \ 00110 case 7: l2|=((unsigned long)(*(--(c))))<< 8; \ 00111 case 6: l2|=((unsigned long)(*(--(c))))<<16; \ 00112 case 5: l2|=((unsigned long)(*(--(c))))<<24; \ 00113 case 4: l1 =((unsigned long)(*(--(c)))) ; \ 00114 case 3: l1|=((unsigned long)(*(--(c))))<< 8; \ 00115 case 2: l1|=((unsigned long)(*(--(c))))<<16; \ 00116 case 1: l1|=((unsigned long)(*(--(c))))<<24; \ 00117 } \ 00118 } 00119 00120 /* NOTE - c is not incremented as per l2n */ 00121 #define l2nn(l1,l2,c,n) { \ 00122 c+=n; \ 00123 switch (n) { \ 00124 case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \ 00125 case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \ 00126 case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \ 00127 case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \ 00128 case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \ 00129 case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \ 00130 case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \ 00131 case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \ 00132 } \ 00133 } 00134 00135 #undef n2l 00136 #define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \ 00137 l|=((unsigned long)(*((c)++)))<<16L, \ 00138 l|=((unsigned long)(*((c)++)))<< 8L, \ 00139 l|=((unsigned long)(*((c)++)))) 00140 00141 #undef l2n 00142 #define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \ 00143 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ 00144 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ 00145 *((c)++)=(unsigned char)(((l) )&0xff)) 00146 00147 #define C_RC2(n) \ 00148 t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff; \ 00149 x0=(t<<1)|(t>>15); \ 00150 t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff; \ 00151 x1=(t<<2)|(t>>14); \ 00152 t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff; \ 00153 x2=(t<<3)|(t>>13); \ 00154 t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff; \ 00155 x3=(t<<5)|(t>>11); 00156