On Thursday 15 May 2008 17:01, Daniel Cheng wrote:
> On Thu, May 15, 2008 at 10:30 PM, Matthew Toseland
> <toad at amphibian.dyndns.org> wrote:
> > On Tuesday 13 May 2008 17:10, j16sdiz at freenetproject.org wrote:
> >> Author: j16sdiz
> >> Date: 2008-05-13 16:10:32 +0000 (Tue, 13 May 2008)
> >> New Revision: 19912
> >>
> >> Modified:
> >> trunk/freenet/src/freenet/crypt/ciphers/Rijndael.java
> >> Log:
> >> No Monte Carlo test for Rijndael
> >
> > Huh?
>
> The test output the monte carlo test result, it is supposed to be compared
> with ecb_e_m.txt in the FIPS standard.
>
> Our implementation is the original Rijndael (not the one in FIPS standard),
> the output does not match ecb_e_m.txt.
Is that bad? Presumably changes during the standardisation process were to
improve security?
>
> >> Modified: trunk/freenet/src/freenet/crypt/ciphers/Rijndael.java
> >> ===================================================================
> >> --- trunk/freenet/src/freenet/crypt/ciphers/Rijndael.java 2008-05-13
> > 12:11:24 UTC (rev 19911)
> >> +++ trunk/freenet/src/freenet/crypt/ciphers/Rijndael.java 2008-05-13
> > 16:10:32 UTC (rev 19912)
> >> @@ -102,65 +102,6 @@
> >> throw new IllegalArgumentException();
> >> Rijndael_Algorithm.blockDecrypt(block, result, 0,
sessionKey,
> > blocksize/8);
> >> }
> >> -
> >> - public static void main(String[] args) throws
UnsupportedCipherException {
> >> - // Perform the Monte Carlo test
> >> -
> >> - System.out.println("KEYSIZE=128\n");
> >> - monteCarlo(128);
> >> - System.out.println("=========================\n");
> >> - System.out.println("KEYSIZE=192\n");
> >> - monteCarlo(192);
> >> - System.out.println("=========================\n");
> >> - System.out.println("KEYSIZE=256\n");
> >> - monteCarlo(256);
> >> - }
> >> -
> >> - static void monteCarlo(int keySize) throws
UnsupportedCipherException {
> >> - Rijndael ctx=new Rijndael(keySize);
> >> - int kb=keySize/8;
> >> - byte[] P=new byte[16], C=new byte[16],
> >> - CL=new byte[16], KEY=new byte[kb];
> >> -
> >> - for (int i=0; i<400; i++) {
> >> - System.out.println("I="+i);
> >> -
System.out.println("KEY="+HexUtil.bytesToHex(KEY,0,kb));
> >> -
> >> -
System.out.println("PT="+HexUtil.bytesToHex(P,0,16));
> >> -
> >> - ctx.initialize(KEY);
> >> - for (int j=0; j<10000; j++) {
> >> - System.arraycopy(C, 0, CL, 0, C.length);
> >> - ctx.encipher(P, C);
> >> - System.arraycopy(C, 0, P, 0, P.length);
> >> - }
> >> -
System.out.println("CT="+HexUtil.bytesToHex(C,0,16));
> >> -
> >> -
> >> - for (int x=0; x<kb; x++) {
> >> - if (keySize==192)
> >> - if (x<8)
> >> - KEY[x]^=CL[8+x];
> >> - else
> >> - KEY[x]^=C[x-8];
> >> - else if (keySize==256)
> >> - if (x<16)
> >> - KEY[x]^=CL[x];
> >> - else
> >> - KEY[x]^=C[x-16];
> >> - else KEY[x]^=C[x];
> >> - }
> >> -
> >> - if (keySize==192)
> >> - for (int x=0; x<8; x++)
> >> - KEY[x+16]^=CL[x+8];
> >> - else if (keySize==256)
> >> - for (int x=0; x<16; x++)
> >> - KEY[x+16]^=CL[x];
> >> -
> >> - System.out.println();
> >> - }
> >> - }
> >> }
> >>
> >>
> >>
> >> _______________________________________________
> >> cvs mailing list
> >> cvs at freenetproject.org
> >> http://emu.freenetproject.org/cgi-bin/mailman/listinfo/cvs
> >>
> >>
> >
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> >
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