--- /dev/null
+/* ede_cbcm_enc.c */
+/* Written by Ben Laurie <ben@algroup.co.uk> for the OpenSSL
+ * project 13 Feb 1999.
+ */
+/* ====================================================================
+ * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
+ *
+ * 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 above 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 acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+/*
+
+This is an implementation of Triple DES Cipher Block Chaining with Output
+Feedback Masking, by Coppersmith, Johnson and Matyas, (IBM and Certicom).
+
+Note that there is a known attack on this by Biham and Knudsen but it takes
+a lot of work:
+
+http://www.cs.technion.ac.il/users/wwwb/cgi-bin/tr-get.cgi/1998/CS/CS0928.ps.gz
+
+*/
+
+#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_DESCBCM is defined */
+
+#ifndef OPENSSL_NO_DESCBCM
+#include "des_locl.h"
+
+void DES_ede3_cbcm_encrypt(const unsigned char *in, unsigned char *out,
+ long length, DES_key_schedule *ks1, DES_key_schedule *ks2,
+ DES_key_schedule *ks3, DES_cblock *ivec1, DES_cblock *ivec2,
+ int enc)
+ {
+ register DES_LONG tin0,tin1;
+ register DES_LONG tout0,tout1,xor0,xor1,m0,m1;
+ register long l=length;
+ DES_LONG tin[2];
+ unsigned char *iv1,*iv2;
+
+ iv1 = &(*ivec1)[0];
+ iv2 = &(*ivec2)[0];
+
+ if (enc)
+ {
+ c2l(iv1,m0);
+ c2l(iv1,m1);
+ c2l(iv2,tout0);
+ c2l(iv2,tout1);
+ for (l-=8; l>=-7; l-=8)
+ {
+ tin[0]=m0;
+ tin[1]=m1;
+ DES_encrypt1(tin,ks3,1);
+ m0=tin[0];
+ m1=tin[1];
+
+ if(l < 0)
+ {
+ c2ln(in,tin0,tin1,l+8);
+ }
+ else
+ {
+ c2l(in,tin0);
+ c2l(in,tin1);
+ }
+ tin0^=tout0;
+ tin1^=tout1;
+
+ tin[0]=tin0;
+ tin[1]=tin1;
+ DES_encrypt1(tin,ks1,1);
+ tin[0]^=m0;
+ tin[1]^=m1;
+ DES_encrypt1(tin,ks2,0);
+ tin[0]^=m0;
+ tin[1]^=m1;
+ DES_encrypt1(tin,ks1,1);
+ tout0=tin[0];
+ tout1=tin[1];
+
+ l2c(tout0,out);
+ l2c(tout1,out);
+ }
+ iv1=&(*ivec1)[0];
+ l2c(m0,iv1);
+ l2c(m1,iv1);
+
+ iv2=&(*ivec2)[0];
+ l2c(tout0,iv2);
+ l2c(tout1,iv2);
+ }
+ else
+ {
+ register DES_LONG t0,t1;
+
+ c2l(iv1,m0);
+ c2l(iv1,m1);
+ c2l(iv2,xor0);
+ c2l(iv2,xor1);
+ for (l-=8; l>=-7; l-=8)
+ {
+ tin[0]=m0;
+ tin[1]=m1;
+ DES_encrypt1(tin,ks3,1);
+ m0=tin[0];
+ m1=tin[1];
+
+ c2l(in,tin0);
+ c2l(in,tin1);
+
+ t0=tin0;
+ t1=tin1;
+
+ tin[0]=tin0;
+ tin[1]=tin1;
+ DES_encrypt1(tin,ks1,0);
+ tin[0]^=m0;
+ tin[1]^=m1;
+ DES_encrypt1(tin,ks2,1);
+ tin[0]^=m0;
+ tin[1]^=m1;
+ DES_encrypt1(tin,ks1,0);
+ tout0=tin[0];
+ tout1=tin[1];
+
+ tout0^=xor0;
+ tout1^=xor1;
+ if(l < 0)
+ {
+ l2cn(tout0,tout1,out,l+8);
+ }
+ else
+ {
+ l2c(tout0,out);
+ l2c(tout1,out);
+ }
+ xor0=t0;
+ xor1=t1;
+ }
+
+ iv1=&(*ivec1)[0];
+ l2c(m0,iv1);
+ l2c(m1,iv1);
+
+ iv2=&(*ivec2)[0];
+ l2c(xor0,iv2);
+ l2c(xor1,iv2);
+ }
+ tin0=tin1=tout0=tout1=xor0=xor1=0;
+ tin[0]=tin[1]=0;
+ }
+#endif
projects / cassiopeia.git / blobdiff