Package org.bouncycastle.crypto
Interface DSA
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- All Known Subinterfaces:
DSAExt
- All Known Implementing Classes:
DSASigner
,DSTU4145Signer
,ECDSASigner
,ECGOST3410_2012Signer
,ECGOST3410Signer
,ECNRSigner
,GOST3410Signer
public interface DSA
interface for classes implementing algorithms modeled similar to the Digital Signature Alorithm.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description java.math.BigInteger[]
generateSignature(byte[] message)
sign the passed in message (usually the output of a hash function).void
init(boolean forSigning, CipherParameters param)
initialise the signer for signature generation or signature verification.boolean
verifySignature(byte[] message, java.math.BigInteger r, java.math.BigInteger s)
verify the message message against the signature values r and s.
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Method Detail
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init
void init(boolean forSigning, CipherParameters param)
initialise the signer for signature generation or signature verification.- Parameters:
forSigning
- true if we are generating a signature, false otherwise.param
- key parameters for signature generation.
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generateSignature
java.math.BigInteger[] generateSignature(byte[] message)
sign the passed in message (usually the output of a hash function).- Parameters:
message
- the message to be signed.- Returns:
- two big integers representing the r and s values respectively.
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verifySignature
boolean verifySignature(byte[] message, java.math.BigInteger r, java.math.BigInteger s)
verify the message message against the signature values r and s.- Parameters:
message
- the message that was supposed to have been signed.r
- the r signature value.s
- the s signature value.
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