Troubleshooting
Signature Algorithms
| Q1: | Why can't the JDK find the signature algorithm I asked for? |
| Make sure you are using a security provider that supports it. If you're using one of the ones mentioned in this chapter, the JDK should have built-in support already. Also make sure that you have the capitalization correct and that you put the digest algorithm first and not the encryption (SHA1withDSA, not DSAwithSHA1). | |
| Q2: | Why do I get an exception telling me that it can't find my key? |
| You might have forgotten to run keytool to create the key, or you might have entered the key alias incorrectly. Type keytool -list to see the keys in your key store. |
Comparing Signatures
| Q1: | Why don't the signatures match up? |
| Either the file you're checking has been changed, ... |
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