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/*
* test program for blowfish; very hard to use (sorry!)
*/
/*
* This file is part of ipif, part of userv-utils
*
* Copyright 1996-2013 Ian Jackson <ijackson@chiark.greenend.org.uk>
* Copyright 1998 David Damerell <damerell@chiark.greenend.org.uk>
* Copyright 1999,2003
* Chancellor Masters and Scholars of the University of Cambridge
* Copyright 2010 Tony Finch <fanf@dotat.at>
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with userv-utils; if not, see http://www.gnu.org/licenses/.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include "blowfish.h"
#include "hex.h"
int main(void) {
char buf[200], keybuf[200], plainbuf[200], cipherbuf[200], comparebuf[200], ivbuf[200];
char keytxt[sizeof(buf)+1], plaintxt[sizeof(buf)+1], ciphertxt[sizeof(buf)+1];
uint8_t key[BLOWFISH_MAXKEYBYTES*2], plain[100], cipher[100], compare[100];
uint8_t iv[BLOWFISH_BLOCKBYTES];
int keysz, plainsz, ciphersz, cskey, csiv, csplain, i;
struct blowfish_expandedkey ek;
struct blowfish_cbc_state cs;
setvbuf(stdout,0,_IOLBF,BUFSIZ);
buf[sizeof(buf)-2]=0;
keytxt[sizeof(buf)]= 0;
plaintxt[sizeof(buf)]= 0;
ciphertxt[sizeof(buf)]= 0;
cskey= csiv= csplain= 0;
while (fgets(buf,sizeof(buf),stdin)) {
if (buf[sizeof(buf)-2]) { fprintf(stderr,"line too long %s...\n",buf); exit(1); }
if (sscanf(buf,"ecb %s %s %s\n",keytxt,plaintxt,ciphertxt) ==3) {
unhex("ecb key",keytxt,key,&keysz,1,sizeof(key));
unhex("ecb plain",plaintxt,plain,0,BLOWFISH_BLOCKBYTES,BLOWFISH_BLOCKBYTES);
unhex("ecb cipher",ciphertxt,cipher,0,BLOWFISH_BLOCKBYTES,BLOWFISH_BLOCKBYTES);
printf("ecb %s %s %s\n",
tohex(key,keysz,keybuf),
tohex(plain,BLOWFISH_BLOCKBYTES,plainbuf),
tohex(cipher,BLOWFISH_BLOCKBYTES,cipherbuf));
blowfish_loadkey(&ek,key,keysz);
blowfish_encrypt(&ek,plain,compare);
if (memcmp(cipher,compare,BLOWFISH_BLOCKBYTES)) {
fprintf(stderr,"encryption mismatch - got %s\n",
tohex(compare,BLOWFISH_BLOCKBYTES,comparebuf));
exit(1);
}
blowfish_decrypt(&ek,cipher,compare);
if (memcmp(plain,compare,BLOWFISH_BLOCKBYTES)) {
fprintf(stderr,"decryption mismatch - got %s\n",
tohex(compare,BLOWFISH_BLOCKBYTES,comparebuf));
exit(1);
}
} else if (sscanf(buf,"key %s\n",keytxt)) {
unhex("key",keytxt,key,&keysz,1,sizeof(key));
blowfish_loadkey(&cs.ek,key,keysz);
cskey= 1;
} else if (sscanf(buf,"iv %s\n",keytxt)) {
unhex("iv",keytxt,iv,0,BLOWFISH_BLOCKBYTES,BLOWFISH_BLOCKBYTES);
csiv= 1;
} else if (sscanf(buf,"plain %s\n",plaintxt)) {
unhex("plain",plaintxt,plain,&plainsz,0,sizeof(plain));
csplain= 1;
} else if (sscanf(buf,"cbc %s\n",ciphertxt)) {
if (!cskey || !csiv || !csplain) {
fprintf(stderr,"failed to specify%s%s%s\n",
cskey ? "" : " key",
csiv ? "" : " iv",
csplain ? "" : " plain");
exit(1);
}
unhex("cbc cipher",ciphertxt,cipher,&ciphersz,0,sizeof(cipher));
printf("key %s\niv %s\nplain %s\ncipher %s\n",
tohex(key,keysz,keybuf),
tohex(iv,BLOWFISH_BLOCKBYTES,ivbuf),
tohex(plain,plainsz,plainbuf),
tohex(cipher,ciphersz,cipherbuf));
if (plainsz % BLOWFISH_BLOCKBYTES ||
ciphersz % BLOWFISH_BLOCKBYTES ||
plainsz != ciphersz) {
fprintf(stderr,"size mismatch plain=%d cipher=%d block=%d\n",
plainsz,ciphersz,BLOWFISH_BLOCKBYTES);
exit(1);
}
blowfish_cbc_setiv(&cs,iv);
for (i=0; i<plainsz; i+=BLOWFISH_BLOCKBYTES)
blowfish_cbc_decrypt(&cs,cipher+i,compare+i);
if (memcmp(plain,compare,BLOWFISH_BLOCKBYTES)) {
fprintf(stderr,"decryption mismatch - got %s\n",
tohex(compare,plainsz,comparebuf));
exit(1);
}
blowfish_cbc_setiv(&cs,iv);
for (i=0; i<plainsz; i+=BLOWFISH_BLOCKBYTES)
blowfish_cbc_encrypt(&cs,plain+i,compare+i);
if (memcmp(cipher,compare,BLOWFISH_BLOCKBYTES)) {
fprintf(stderr,"encryption mismatch - got %s\n",
tohex(compare,plainsz,comparebuf));
exit(1);
}
} else if (buf[0]=='#' || buf[0]=='\n') {
} else {
fprintf(stderr,"huh ? %s",buf);
}
}
if (ferror(stdin)) { perror("stdin"); exit(1); }
return 0;
}
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