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137 lines
4.9 KiB
137 lines
4.9 KiB
/* crypto/bf/bf_enc.c */ |
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/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
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* by Eric Young (eay@mincom.oz.au). |
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* The implementation was written so as to conform with Netscapes SSL. |
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* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@mincom.oz.au). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@mincom.oz.au)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@mincom.oz.au)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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#include "blowfish.h" |
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#include "bf_locl.h" |
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/* Blowfish as implemented from 'Blowfish: Springer-Verlag paper' |
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* (From LECTURE NOTES IN COIMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION, |
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* CAMBRIDGE SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993) |
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*/ |
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#if (BF_ROUNDS != 16) && (BF_ROUNDS != 20) |
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If you set BF_ROUNDS to some value other than 16 or 20, you will have |
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to modify the code. |
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#endif |
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void BF_encrypt(BF_LONG *data, BF_KEY *key, int encrypt) |
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{ |
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register BF_LONG l,r,*p,*s; |
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p=key->P; |
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s= &(key->S[0]); |
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l=data[0]; |
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r=data[1]; |
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if (encrypt != 0) |
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{ |
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l^=p[0]; |
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BF_ENC(r,l,s,p[ 1]); |
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BF_ENC(l,r,s,p[ 2]); |
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BF_ENC(r,l,s,p[ 3]); |
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BF_ENC(l,r,s,p[ 4]); |
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BF_ENC(r,l,s,p[ 5]); |
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BF_ENC(l,r,s,p[ 6]); |
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BF_ENC(r,l,s,p[ 7]); |
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BF_ENC(l,r,s,p[ 8]); |
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BF_ENC(r,l,s,p[ 9]); |
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BF_ENC(l,r,s,p[10]); |
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BF_ENC(r,l,s,p[11]); |
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BF_ENC(l,r,s,p[12]); |
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BF_ENC(r,l,s,p[13]); |
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BF_ENC(l,r,s,p[14]); |
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BF_ENC(r,l,s,p[15]); |
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BF_ENC(l,r,s,p[16]); |
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#if BF_ROUNDS == 20 |
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BF_ENC(r,l,s,p[17]); |
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BF_ENC(l,r,s,p[18]); |
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BF_ENC(r,l,s,p[19]); |
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BF_ENC(l,r,s,p[20]); |
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#endif |
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r^=p[BF_ROUNDS+1]; |
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} |
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else |
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{ |
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l^=p[BF_ROUNDS+1]; |
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#if BF_ROUNDS == 20 |
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BF_ENC(r,l,s,p[20]); |
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BF_ENC(l,r,s,p[19]); |
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BF_ENC(r,l,s,p[18]); |
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BF_ENC(l,r,s,p[17]); |
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#endif |
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BF_ENC(r,l,s,p[16]); |
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BF_ENC(l,r,s,p[15]); |
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BF_ENC(r,l,s,p[14]); |
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BF_ENC(l,r,s,p[13]); |
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BF_ENC(r,l,s,p[12]); |
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BF_ENC(l,r,s,p[11]); |
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BF_ENC(r,l,s,p[10]); |
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BF_ENC(l,r,s,p[ 9]); |
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BF_ENC(r,l,s,p[ 8]); |
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BF_ENC(l,r,s,p[ 7]); |
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BF_ENC(r,l,s,p[ 6]); |
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BF_ENC(l,r,s,p[ 5]); |
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BF_ENC(r,l,s,p[ 4]); |
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BF_ENC(l,r,s,p[ 3]); |
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BF_ENC(r,l,s,p[ 2]); |
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BF_ENC(l,r,s,p[ 1]); |
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r^=p[0]; |
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} |
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data[1]=l&0xffffffff; |
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data[0]=r&0xffffffff; |
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}
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