--- /dev/null
+/* crypto/rc2/rc2_cbc.c */
+/* 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 <openssl/rc2.h>
+#include "rc2_locl.h"
+
+void RC2_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
+ RC2_KEY *ks, unsigned char *iv, int encrypt)
+ {
+ register unsigned long tin0,tin1;
+ register unsigned long tout0,tout1,xor0,xor1;
+ register long l=length;
+ unsigned long tin[2];
+
+ if (encrypt)
+ {
+ c2l(iv,tout0);
+ c2l(iv,tout1);
+ iv-=8;
+ for (l-=8; l>=0; l-=8)
+ {
+ c2l(in,tin0);
+ c2l(in,tin1);
+ tin0^=tout0;
+ tin1^=tout1;
+ tin[0]=tin0;
+ tin[1]=tin1;
+ RC2_encrypt(tin,ks);
+ tout0=tin[0]; l2c(tout0,out);
+ tout1=tin[1]; l2c(tout1,out);
+ }
+ if (l != -8)
+ {
+ c2ln(in,tin0,tin1,l+8);
+ tin0^=tout0;
+ tin1^=tout1;
+ tin[0]=tin0;
+ tin[1]=tin1;
+ RC2_encrypt(tin,ks);
+ tout0=tin[0]; l2c(tout0,out);
+ tout1=tin[1]; l2c(tout1,out);
+ }
+ l2c(tout0,iv);
+ l2c(tout1,iv);
+ }
+ else
+ {
+ c2l(iv,xor0);
+ c2l(iv,xor1);
+ iv-=8;
+ for (l-=8; l>=0; l-=8)
+ {
+ c2l(in,tin0); tin[0]=tin0;
+ c2l(in,tin1); tin[1]=tin1;
+ RC2_decrypt(tin,ks);
+ tout0=tin[0]^xor0;
+ tout1=tin[1]^xor1;
+ l2c(tout0,out);
+ l2c(tout1,out);
+ xor0=tin0;
+ xor1=tin1;
+ }
+ if (l != -8)
+ {
+ c2l(in,tin0); tin[0]=tin0;
+ c2l(in,tin1); tin[1]=tin1;
+ RC2_decrypt(tin,ks);
+ tout0=tin[0]^xor0;
+ tout1=tin[1]^xor1;
+ l2cn(tout0,tout1,out,l+8);
+ xor0=tin0;
+ xor1=tin1;
+ }
+ l2c(xor0,iv);
+ l2c(xor1,iv);
+ }
+ tin0=tin1=tout0=tout1=xor0=xor1=0;
+ tin[0]=tin[1]=0;
+ }
+
+void RC2_encrypt(unsigned long *d, RC2_KEY *key)
+ {
+ int i,n;
+ register RC2_INT *p0,*p1;
+ register RC2_INT x0,x1,x2,x3,t;
+ unsigned long l;
+
+ l=d[0];
+ x0=(RC2_INT)l&0xffff;
+ x1=(RC2_INT)(l>>16L);
+ l=d[1];
+ x2=(RC2_INT)l&0xffff;
+ x3=(RC2_INT)(l>>16L);
+
+ n=3;
+ i=5;
+
+ p0=p1= &(key->data[0]);
+ for (;;)
+ {
+ t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff;
+ x0=(t<<1)|(t>>15);
+ t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff;
+ x1=(t<<2)|(t>>14);
+ t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff;
+ x2=(t<<3)|(t>>13);
+ t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff;
+ x3=(t<<5)|(t>>11);
+
+ if (--i == 0)
+ {
+ if (--n == 0) break;
+ i=(n == 2)?6:5;
+
+ x0+=p1[x3&0x3f];
+ x1+=p1[x0&0x3f];
+ x2+=p1[x1&0x3f];
+ x3+=p1[x2&0x3f];
+ }
+ }
+
+ d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L);
+ d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L);
+ }
+
+void RC2_decrypt(unsigned long *d, RC2_KEY *key)
+ {
+ int i,n;
+ register RC2_INT *p0,*p1;
+ register RC2_INT x0,x1,x2,x3,t;
+ unsigned long l;
+
+ l=d[0];
+ x0=(RC2_INT)l&0xffff;
+ x1=(RC2_INT)(l>>16L);
+ l=d[1];
+ x2=(RC2_INT)l&0xffff;
+ x3=(RC2_INT)(l>>16L);
+
+ n=3;
+ i=5;
+
+ p0= &(key->data[63]);
+ p1= &(key->data[0]);
+ for (;;)
+ {
+ t=((x3<<11)|(x3>>5))&0xffff;
+ x3=(t-(x0& ~x2)-(x1&x2)- *(p0--))&0xffff;
+ t=((x2<<13)|(x2>>3))&0xffff;
+ x2=(t-(x3& ~x1)-(x0&x1)- *(p0--))&0xffff;
+ t=((x1<<14)|(x1>>2))&0xffff;
+ x1=(t-(x2& ~x0)-(x3&x0)- *(p0--))&0xffff;
+ t=((x0<<15)|(x0>>1))&0xffff;
+ x0=(t-(x1& ~x3)-(x2&x3)- *(p0--))&0xffff;
+
+ if (--i == 0)
+ {
+ if (--n == 0) break;
+ i=(n == 2)?6:5;
+
+ x3=(x3-p1[x2&0x3f])&0xffff;
+ x2=(x2-p1[x1&0x3f])&0xffff;
+ x1=(x1-p1[x0&0x3f])&0xffff;
+ x0=(x0-p1[x3&0x3f])&0xffff;
+ }
+ }
+
+ d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L);
+ d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L);
+ }
+
projects / bcm963xx.git / blobdiff