FreeBSD/Linux Kernel Cross Reference
sys/crypto/des/des_ecb.c

     /*      $FreeBSD$       */
     /*      $KAME: des_ecb.c,v 1.6 2001/09/10 04:03:58 itojun Exp $ */
     
     /* crypto/des/ecb_enc.c */
     /* Copyright (C) 1995-1998 Eric Young (eay@mincom.oz.au)
      * All rights reserved.
      *
      * This file is part of an SSL implementation written
      * by Eric Young (eay@mincom.oz.au).
     * The implementation was written so as to conform with Netscapes SSL
     * specification.  This library and applications are
     * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
     * as long as the following conditions are aheared to.
     *
     * Copyright remains Eric Young's, and as such any Copyright notices in
     * the code are not to be removed.  If this code is used in a product,
     * Eric Young should be given attribution as the author of the parts 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 software developed by Eric Young (eay@mincom.oz.au)
     *
     * 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 <sys/param.h>
    #include <sys/systm.h>
    #include <crypto/des/des_locl.h>
    #include <crypto/des/spr.h>
    
    /* char *libdes_version="libdes v 3.24 - 20-Apr-1996 - eay"; */ /* wrong */
    /* char *DES_version="DES part of SSLeay 0.6.4 30-Aug-1996"; */
    
    char *des_options(void)
            {
            static int init=1;
            static char buf[32];
    
            if (init)
                    {
                    const char *ptr,*unroll,*risc,*size;
    
    #ifdef DES_PTR
                    ptr="ptr";
    #else
                    ptr="idx";
    #endif
    #if defined(DES_RISC1) || defined(DES_RISC2)
    #ifdef DES_RISC1
                    risc="risc1";
    #endif
    #ifdef DES_RISC2
                    risc="risc2";
    #endif
    #else
                    risc="cisc";
    #endif
    #ifdef DES_UNROLL
                    unroll="16";
    #else
                    unroll="4";
    #endif
                    if (sizeof(DES_LONG) != sizeof(long))
                            size="int";
                    else
                            size="long";
                    sprintf(buf,"des(%s,%s,%s,%s)",ptr,risc,unroll,size);
                    init=0;
                    }
            return(buf);
    }
    void des_ecb_encrypt(des_cblock *input, des_cblock *output, 
                         des_key_schedule ks, int enc)
    {
           register DES_LONG l;
           DES_LONG ll[2];
           const unsigned char *in=&(*input)[0];
           unsigned char *out = &(*output)[0];
   
           c2l(in,l); ll[0]=l;
           c2l(in,l); ll[1]=l;
           des_encrypt1(ll,ks,enc);
           l=ll[0]; l2c(l,out);
           l=ll[1]; l2c(l,out);
           l=ll[0]=ll[1]=0;
   }
   
   void des_ecb3_encrypt(des_cblock *input, des_cblock *output,
                des_key_schedule ks1, des_key_schedule ks2, des_key_schedule ks3,
                int enc)
   {
           register DES_LONG l0,l1;
           DES_LONG ll[2];
           const unsigned char *in = &(*input)[0];
           unsigned char *out = &(*output)[0];
    
           c2l(in,l0); 
           c2l(in,l1);
           ll[0]=l0; 
           ll[1]=l1;
   
           if (enc)
                   des_encrypt3(ll,ks1,ks2,ks3);
           else
                   des_decrypt3(ll,ks1,ks2,ks3);
   
           l0=ll[0];
           l1=ll[1];
           l2c(l0,out);
           l2c(l1,out);
   }

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