| /* 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 */ |
