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+/* crypto/des/des_enc.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 "des_locl.h"
+#include "spr.h"
+
+void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
+ {
+ register DES_LONG l,r,t,u;
+#ifdef DES_PTR
+ register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
+#endif
+#ifndef DES_UNROLL
+ register int i;
+#endif
+ register DES_LONG *s;
+
+ r=data[0];
+ l=data[1];
+
+ IP(r,l);
+ /* Things have been modified so that the initial rotate is
+ * done outside the loop. This required the
+ * DES_SPtrans values in sp.h to be rotated 1 bit to the right.
+ * One perl script later and things have a 5% speed up on a sparc2.
+ * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
+ * for pointing this out. */
+ /* clear the top bits on machines with 8byte longs */
+ /* shift left by 2 */
+ r=ROTATE(r,29)&0xffffffffL;
+ l=ROTATE(l,29)&0xffffffffL;
+
+ s=ks->ks->deslong;
+ /* I don't know if it is worth the effort of loop unrolling the
+ * inner loop */
+ if (enc)
+ {
+#ifdef DES_UNROLL
+ D_ENCRYPT(l,r, 0); /* 1 */
+ D_ENCRYPT(r,l, 2); /* 2 */
+ D_ENCRYPT(l,r, 4); /* 3 */
+ D_ENCRYPT(r,l, 6); /* 4 */
+ D_ENCRYPT(l,r, 8); /* 5 */
+ D_ENCRYPT(r,l,10); /* 6 */
+ D_ENCRYPT(l,r,12); /* 7 */
+ D_ENCRYPT(r,l,14); /* 8 */
+ D_ENCRYPT(l,r,16); /* 9 */
+ D_ENCRYPT(r,l,18); /* 10 */
+ D_ENCRYPT(l,r,20); /* 11 */
+ D_ENCRYPT(r,l,22); /* 12 */
+ D_ENCRYPT(l,r,24); /* 13 */
+ D_ENCRYPT(r,l,26); /* 14 */
+ D_ENCRYPT(l,r,28); /* 15 */
+ D_ENCRYPT(r,l,30); /* 16 */
+#else
+ for (i=0; i<32; i+=4)
+ {
+ D_ENCRYPT(l,r,i+0); /* 1 */
+ D_ENCRYPT(r,l,i+2); /* 2 */
+ }
+#endif
+ }
+ else
+ {
+#ifdef DES_UNROLL
+ D_ENCRYPT(l,r,30); /* 16 */
+ D_ENCRYPT(r,l,28); /* 15 */
+ D_ENCRYPT(l,r,26); /* 14 */
+ D_ENCRYPT(r,l,24); /* 13 */
+ D_ENCRYPT(l,r,22); /* 12 */
+ D_ENCRYPT(r,l,20); /* 11 */
+ D_ENCRYPT(l,r,18); /* 10 */
+ D_ENCRYPT(r,l,16); /* 9 */
+ D_ENCRYPT(l,r,14); /* 8 */
+ D_ENCRYPT(r,l,12); /* 7 */
+ D_ENCRYPT(l,r,10); /* 6 */
+ D_ENCRYPT(r,l, 8); /* 5 */
+ D_ENCRYPT(l,r, 6); /* 4 */
+ D_ENCRYPT(r,l, 4); /* 3 */
+ D_ENCRYPT(l,r, 2); /* 2 */
+ D_ENCRYPT(r,l, 0); /* 1 */
+#else
+ for (i=30; i>0; i-=4)
+ {
+ D_ENCRYPT(l,r,i-0); /* 16 */
+ D_ENCRYPT(r,l,i-2); /* 15 */
+ }
+#endif
+ }
+
+ /* rotate and clear the top bits on machines with 8byte longs */
+ l=ROTATE(l,3)&0xffffffffL;
+ r=ROTATE(r,3)&0xffffffffL;
+
+ FP(r,l);
+ data[0]=l;
+ data[1]=r;
+ l=r=t=u=0;
+ }
+
+void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)
+ {
+ register DES_LONG l,r,t,u;
+#ifdef DES_PTR
+ register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans;
+#endif
+#ifndef DES_UNROLL
+ register int i;
+#endif
+ register DES_LONG *s;
+
+ r=data[0];
+ l=data[1];
+
+ /* Things have been modified so that the initial rotate is
+ * done outside the loop. This required the
+ * DES_SPtrans values in sp.h to be rotated 1 bit to the right.
+ * One perl script later and things have a 5% speed up on a sparc2.
+ * Thanks to Richard Outerbridge <71755.204@CompuServe.COM>
+ * for pointing this out. */
+ /* clear the top bits on machines with 8byte longs */
+ r=ROTATE(r,29)&0xffffffffL;
+ l=ROTATE(l,29)&0xffffffffL;
+
+ s=ks->ks->deslong;
+ /* I don't know if it is worth the effort of loop unrolling the
+ * inner loop */
+ if (enc)
+ {
+#ifdef DES_UNROLL
+ D_ENCRYPT(l,r, 0); /* 1 */
+ D_ENCRYPT(r,l, 2); /* 2 */
+ D_ENCRYPT(l,r, 4); /* 3 */
+ D_ENCRYPT(r,l, 6); /* 4 */
+ D_ENCRYPT(l,r, 8); /* 5 */
+ D_ENCRYPT(r,l,10); /* 6 */
+ D_ENCRYPT(l,r,12); /* 7 */
+ D_ENCRYPT(r,l,14); /* 8 */
+ D_ENCRYPT(l,r,16); /* 9 */
+ D_ENCRYPT(r,l,18); /* 10 */
+ D_ENCRYPT(l,r,20); /* 11 */
+ D_ENCRYPT(r,l,22); /* 12 */
+ D_ENCRYPT(l,r,24); /* 13 */
+ D_ENCRYPT(r,l,26); /* 14 */
+ D_ENCRYPT(l,r,28); /* 15 */
+ D_ENCRYPT(r,l,30); /* 16 */
+#else
+ for (i=0; i<32; i+=4)
+ {
+ D_ENCRYPT(l,r,i+0); /* 1 */
+ D_ENCRYPT(r,l,i+2); /* 2 */
+ }
+#endif
+ }
+ else
+ {
+#ifdef DES_UNROLL
+ D_ENCRYPT(l,r,30); /* 16 */
+ D_ENCRYPT(r,l,28); /* 15 */
+ D_ENCRYPT(l,r,26); /* 14 */
+ D_ENCRYPT(r,l,24); /* 13 */
+ D_ENCRYPT(l,r,22); /* 12 */
+ D_ENCRYPT(r,l,20); /* 11 */
+ D_ENCRYPT(l,r,18); /* 10 */
+ D_ENCRYPT(r,l,16); /* 9 */
+ D_ENCRYPT(l,r,14); /* 8 */
+ D_ENCRYPT(r,l,12); /* 7 */
+ D_ENCRYPT(l,r,10); /* 6 */
+ D_ENCRYPT(r,l, 8); /* 5 */
+ D_ENCRYPT(l,r, 6); /* 4 */
+ D_ENCRYPT(r,l, 4); /* 3 */
+ D_ENCRYPT(l,r, 2); /* 2 */
+ D_ENCRYPT(r,l, 0); /* 1 */
+#else
+ for (i=30; i>0; i-=4)
+ {
+ D_ENCRYPT(l,r,i-0); /* 16 */
+ D_ENCRYPT(r,l,i-2); /* 15 */
+ }
+#endif
+ }
+ /* rotate and clear the top bits on machines with 8byte longs */
+ data[0]=ROTATE(l,3)&0xffffffffL;
+ data[1]=ROTATE(r,3)&0xffffffffL;
+ l=r=t=u=0;
+ }
+
+void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1,
+ DES_key_schedule *ks2, DES_key_schedule *ks3)
+ {
+ register DES_LONG l,r;
+
+ l=data[0];
+ r=data[1];
+ IP(l,r);
+ data[0]=l;
+ data[1]=r;
+ DES_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT);
+ DES_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT);
+ DES_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT);
+ l=data[0];
+ r=data[1];
+ FP(r,l);
+ data[0]=l;
+ data[1]=r;
+ }
+
+void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1,
+ DES_key_schedule *ks2, DES_key_schedule *ks3)
+ {
+ register DES_LONG l,r;
+
+ l=data[0];
+ r=data[1];
+ IP(l,r);
+ data[0]=l;
+ data[1]=r;
+ DES_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT);
+ DES_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT);
+ DES_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT);
+ l=data[0];
+ r=data[1];
+ FP(r,l);
+ data[0]=l;
+ data[1]=r;
+ }
+
+#ifndef DES_DEFAULT_OPTIONS
+
+#undef CBC_ENC_C__DONT_UPDATE_IV
+#include "ncbc_enc.c" /* DES_ncbc_encrypt */
+
+void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output,
+ long length, DES_key_schedule *ks1,
+ DES_key_schedule *ks2, DES_key_schedule *ks3,
+ DES_cblock *ivec, int enc)
+ {
+ register DES_LONG tin0,tin1;
+ register DES_LONG tout0,tout1,xor0,xor1;
+ register const unsigned char *in;
+ unsigned char *out;
+ register long l=length;
+ DES_LONG tin[2];
+ unsigned char *iv;
+
+ in=input;
+ out=output;
+ iv = &(*ivec)[0];
+
+ if (enc)
+ {
+ c2l(iv,tout0);
+ c2l(iv,tout1);
+ for (l-=8; l>=0; l-=8)
+ {
+ c2l(in,tin0);
+ c2l(in,tin1);
+ tin0^=tout0;
+ tin1^=tout1;
+
+ tin[0]=tin0;
+ tin[1]=tin1;
+ DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
+ tout0=tin[0];
+ tout1=tin[1];
+
+ l2c(tout0,out);
+ l2c(tout1,out);
+ }
+ if (l != -8)
+ {
+ c2ln(in,tin0,tin1,l+8);
+ tin0^=tout0;
+ tin1^=tout1;
+
+ tin[0]=tin0;
+ tin[1]=tin1;
+ DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3);
+ tout0=tin[0];
+ tout1=tin[1];
+
+ l2c(tout0,out);
+ l2c(tout1,out);
+ }
+ iv = &(*ivec)[0];
+ l2c(tout0,iv);
+ l2c(tout1,iv);
+ }
+ else
+ {
+ register DES_LONG t0,t1;
+
+ c2l(iv,xor0);
+ c2l(iv,xor1);
+ for (l-=8; l>=0; l-=8)
+ {
+ c2l(in,tin0);
+ c2l(in,tin1);
+
+ t0=tin0;
+ t1=tin1;
+
+ tin[0]=tin0;
+ tin[1]=tin1;
+ DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
+ tout0=tin[0];
+ tout1=tin[1];
+
+ tout0^=xor0;
+ tout1^=xor1;
+ l2c(tout0,out);
+ l2c(tout1,out);
+ xor0=t0;
+ xor1=t1;
+ }
+ if (l != -8)
+ {
+ c2l(in,tin0);
+ c2l(in,tin1);
+
+ t0=tin0;
+ t1=tin1;
+
+ tin[0]=tin0;
+ tin[1]=tin1;
+ DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3);
+ tout0=tin[0];
+ tout1=tin[1];
+
+ tout0^=xor0;
+ tout1^=xor1;
+ l2cn(tout0,tout1,out,l+8);
+ xor0=t0;
+ xor1=t1;
+ }
+
+ iv = &(*ivec)[0];
+ l2c(xor0,iv);
+ l2c(xor1,iv);
+ }
+ tin0=tin1=tout0=tout1=xor0=xor1=0;
+ tin[0]=tin[1]=0;
+ }
+
+#endif /* DES_DEFAULT_OPTIONS */
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