b33abb44fd
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@171 ec53bebd-3082-4978-b11e-865c3cabbd6b
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* 3cbc_enc.c */
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/* Copyright (C) 1993 Eric Young - see README for more details */
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#include "des_locl.h"
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static void
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xp(des_cblock *arg)
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{
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unsigned char *a = (unsigned char *) arg;
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int i;
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for(i=0; i<8; i++) printf("%02X",a[i]);printf("\n");
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}
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int des_3cbc_encrypt(des_cblock (*input), des_cblock (*output), long int length, struct des_ks_struct *ks1, struct des_ks_struct *ks2, des_cblock (*iv1), des_cblock (*iv2), int encrypt)
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{
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int off=length/8-1;
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des_cblock niv1,niv2;
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printf("3cbc\n");
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xp(iv1);
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xp(iv1);
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xp(iv2);
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xp(input);
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if (encrypt == DES_ENCRYPT)
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{
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des_cbc_encrypt(input,output,length,ks1,iv1,encrypt);
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if (length >= sizeof(des_cblock))
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memcpy(niv1,output[off],sizeof(des_cblock));
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des_cbc_encrypt(output,output,length,ks2,iv1,!encrypt);
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des_cbc_encrypt(output,output,length,ks1,iv2, encrypt);
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if (length >= sizeof(des_cblock))
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memcpy(niv2,output[off],sizeof(des_cblock));
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memcpy(*iv1,niv1,sizeof(des_cblock));
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}
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else
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{
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if (length >= sizeof(des_cblock))
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memcpy(niv1,input[off],sizeof(des_cblock));
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des_cbc_encrypt(input,output,length,ks1,iv1,encrypt);
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des_cbc_encrypt(output,output,length,ks2,iv2,!encrypt);
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if (length >= sizeof(des_cblock))
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memcpy(niv2,output[off],sizeof(des_cblock));
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des_cbc_encrypt(output,output,length,ks1,iv2, encrypt);
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}
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memcpy(iv1,niv1,sizeof(des_cblock));
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memcpy(iv2,niv2,sizeof(des_cblock));
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xp(iv1);
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xp(iv1);
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xp(iv2);
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xp(output);
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return(0);
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}
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