Package org.bouncycastle.pqc.crypto.gmss
Class GMSSStateAwareSigner
- java.lang.Object
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- org.bouncycastle.pqc.crypto.gmss.GMSSStateAwareSigner
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- All Implemented Interfaces:
MessageSigner
,StateAwareMessageSigner
public class GMSSStateAwareSigner extends java.lang.Object implements StateAwareMessageSigner
This class implements the GMSS signature scheme, but allows multiple signatures to be generated.Note: getUpdatedPrivateKey() needs to be called to fetch the current value of the usable private key.
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Constructor Summary
Constructors Constructor Description GMSSStateAwareSigner(Digest digest)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description byte[]
generateSignature(byte[] message)
sign the passed in message (usually the output of a hash function).AsymmetricKeyParameter
getUpdatedPrivateKey()
Return the current version of the private key with the updated state.void
init(boolean forSigning, CipherParameters param)
initialise the signer for signature generation or signature verification.boolean
verifySignature(byte[] message, byte[] signature)
verify the message message against the signature value.
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Constructor Detail
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GMSSStateAwareSigner
public GMSSStateAwareSigner(Digest digest)
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Method Detail
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init
public void init(boolean forSigning, CipherParameters param)
Description copied from interface:MessageSigner
initialise the signer for signature generation or signature verification.- Specified by:
init
in interfaceMessageSigner
- Parameters:
forSigning
- true if we are generating a signature, false otherwise.param
- key parameters for signature generation.
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generateSignature
public byte[] generateSignature(byte[] message)
Description copied from interface:MessageSigner
sign the passed in message (usually the output of a hash function).- Specified by:
generateSignature
in interfaceMessageSigner
- Parameters:
message
- the message to be signed.- Returns:
- the signature of the message
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verifySignature
public boolean verifySignature(byte[] message, byte[] signature)
Description copied from interface:MessageSigner
verify the message message against the signature value.- Specified by:
verifySignature
in interfaceMessageSigner
- Parameters:
message
- the message that was supposed to have been signed.signature
- the signature of the message
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getUpdatedPrivateKey
public AsymmetricKeyParameter getUpdatedPrivateKey()
Description copied from interface:StateAwareMessageSigner
Return the current version of the private key with the updated state.Note: calling this method will effectively disable the Signer from being used for further signature generation without another call to init().
- Specified by:
getUpdatedPrivateKey
in interfaceStateAwareMessageSigner
- Returns:
- an updated private key object, which can be used for later signature generation.
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