java signature verification

Question

I am getting the exception ,

java.security.SignatureException: invalid encoding for signature

in my program . the following is the code snippet

Signature sig=Signature.getInstance("SHA1WithDSA"); sig.initVerify(qakeyPair.getPublic()); sig.update(data.getBytes()); sig.verify(sig_bytes)

why is this happening..?

Michael Borgwardt · Accepted Answer · 2010-10-21 07:12:06Z

The contents of sig_bytes are not a valid signature according to what the algorithm expects. Perhaps they're the byte representation of a base64 or hex encoded signature rather than the decoded signature data.

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