org.bouncycastle.crypto
Interface DSA
- DSASigner, ECDSASigner, ECGOST3410Signer, ECNRSigner, GOST3410Signer
interface for classes implementing algorithms modeled similar to the Digital Signature Alorithm.
BigInteger[] | generateSignature(byte[] message) - sign the passed in message (usually the output of a hash function).
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void | init(boolean forSigning, CipherParameters param) - initialise the signer for signature generation or signature
verification.
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boolean | verifySignature(byte[] message, BigInteger r, BigInteger s) - verify the message message against the signature values r and s.
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generateSignature
public BigInteger[] generateSignature(byte[] message)
sign the passed in message (usually the output of a hash function).
message
- the message to be signed.
- two big integers representing the r and s values respectively.
init
public void init(boolean forSigning,
CipherParameters param)
initialise the signer for signature generation or signature
verification.
forSigning
- true if we are generating a signature, false
otherwise.param
- key parameters for signature generation.
verifySignature
public boolean verifySignature(byte[] message,
BigInteger r,
BigInteger s)
verify the message message against the signature values r and s.
message
- the message that was supposed to have been signed.r
- the r signature value.s
- the s signature value.