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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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