MD5 Hash Issue with Java

Question

A java implementation creates two different digest for a same input string, if i run as stand alone application or running inside a web application.

The standalone application matches with oracle dbms The implementation is

    MessageDigest md5 = MessageDigest.getInstance("MD5");

    if (md5 != null) {
        md5.reset();
        newHashByte = md5.digest(msg.getBytes());
    }

    newHash = convertToString(newHashByte);

Hex to String conversion implementation is

StringBuffer result = new StringBuffer(64);

for (int i = 0; i < digestBits.length; i++)
    hexDigit(result, digestBits[i]);

return result.toString();

Highly appreciate if you could help us resolving this.

ZZ Coder · Accepted Answer · 2009-10-20 23:41:20Z

7

I suspect you have different default encodings. Use the correct encoding like this,

newHashByte = md5.digest(msg.getBytes("utf-8"));

answered Oct 20, 2009 at 23:41

ZZ Coder

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Comments

rmeador · Accepted Answer · 2009-10-20 23:26:41Z

2

Where does msg come from in each case? I think it's likely you have a newline character on the end in one case but not the other. It's also possible that your character encodings are set differently somehow in the two scenarios. I highly doubt that anything else in your example is changing except msg.

answered Oct 20, 2009 at 23:26

rmeador

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