net.schmizz.sshj.signature

Interface Signature

All Known Implementing Classes:

AbstractSignature, SignatureDSA, SignatureECDSA, SignatureRSA

public interface Signature

Signature interface for SSH used to sign or verify data. Usually wraps a javax.crypto.Signature object.

Method Summary

Modifier and Type	Method and Description
byte[]	encode(byte[] signature) Encode the signature as blog
void	init(PublicKey pubkey, PrivateKey prvkey) Initialize this signature with the given public key and private key.
byte[]	sign() Compute the signature.
void	update(byte[] H) Convenience method, same as calling update(byte[], int, int) with offset as 0 and H.length.
void	update(byte[] H, int off, int len) Update the computed signature with the given data.
boolean	verify(byte[] sig) Verify against the given signature.

Method Detail

init

void init(PublicKey pubkey,
          PrivateKey prvkey)

Initialize this signature with the given public key and private key. If the private key is null, only signature verification can be performed.

Parameters:

pubkey - (null-ok) specify in case verification is needed

prvkey - (null-ok) specify in case signing is needed

update

void update(byte[] H)

Convenience method, same as calling update(byte[], int, int) with offset as 0 and H.length.

Parameters:

H - the byte-array to update with

update

void update(byte[] H,
            int off,
            int len)

Update the computed signature with the given data.

Parameters:

H - byte-array to update with

off - offset within the array

len - length until which to compute

sign

byte[] sign()

Compute the signature.

Returns:

the computed signature

encode

byte[] encode(byte[] signature)

Encode the signature as blog

Parameters:

signature - the signature to encode

Returns:

Encoded signature

verify

boolean verify(byte[] sig)

Verify against the given signature.

Parameters:

sig - the signature to verify against

Returns:

true on successful verification, false on failure