[Net-snmp-patches] [ net-snmp-Patches-1832574 ] Faster generate_Ku function for keytools.c

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Patches item #1832574, was opened at 2007-11-15 08:16
Message generated for change (Comment added) made by swjayaraya
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Faster generate_Ku function for keytools.c

Initial Comment:
An alternate algorithm to generate_Ku (keytools.c)
http://net-snmp.sourceforge.net/dev/agent/keytools_8c-source.html

[sample code in java]
public static byte[] passphrase2ku(byte[] pass, String algo) {
    final int passLen = pass.length;
    int bufSize = 2048;
    try {
        ByteBuffer bytebuf = ByteBuffer.allocate(bufSize+passLen);
        MessageDigest digest = MessageDigest.getInstance(algo);

        int i;
        for (i=0; i<bufSize; i+=passLen) bytebuf.put(pass);
        byte bbuf[] = bytebuf.array();
        bufSize = i;

        for (i=1048576; i>bufSize; i-=bufSize) digest.update(bbuf, 0, bufSize);
        digest.update(bbuf, 0, i);
        return (digest.digest());
    }
    catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

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Comment By: Swami J (swjayaraya)
Date: 2007-11-15 10:04

Message:
Logged In: YES 
user_id=1938150
Originator: NO

adding submitter id (didnt have an account while submitting this patch)

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=312694&aid=1832574&group_id=12694