rs.baselib.crypto

Class DataSigner

java.lang.Object

rs.baselib.crypto.DataSigner

public class DataSigner
extends Object

The class for signing and verifying signatures.

Author:

ralph

Constructor Summary

Constructors

Constructor and Description
DataSigner() Constructor.
DataSigner(KeyPair keyPair) Constructor from key pair.
DataSigner(PrivateKey privateKey) Constructor from private key.
DataSigner(PrivateKey privateKey, PublicKey publicKey) Constructor from key pair.
DataSigner(PublicKey publicKey) Constructor from public key.

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	getByteSignature(byte[] bytes) Creates a signature for the given bytes.
byte[]	getByteSignature(InputStream in) Creates a signature for the given stream.
byte[]	getByteSignature(Reader reader) Creates a signature for the given stream.
byte[]	getByteSignature(String str) Creates a signature for the given string.
PrivateKey	getPrivateKey() Returns the privateKey.
PublicKey	getPublicKey() Returns the publicKey.
void	setPrivateKey(PrivateKey privateKey) Sets the privateKey.
void	setPrivateKey(String privateKey) Sets the privateKey.
void	setPublicKey(PublicKey publicKey) Sets the publicKey.
void	setPublicKey(String publicKey) Sets the publicKey.
String	sign(byte[] bytes) Creates a signature for the given bytes.
String	sign(InputStream in) Creates a signature for the given stream.
String	sign(Reader reader) Creates a signature for the given stream.
String	sign(String str) Creates a signature for the given string.
void	update(Signature signature, InputStream in) Updates the DSA with the bytes from this stream.
protected void	update(Signature signature, Reader reader) Updates the DSA with the bytes from this stream.
boolean	verify(byte[] signature, byte[] data) Verifies the signature on the given bytes.
boolean	verify(byte[] signature, InputStream in) Verifies the signature on the given stream.
boolean	verify(byte[] signature, Reader in) Verifies the signature on the given stream.
boolean	verify(String signature, InputStream in) Verifies the signature on the given stream.
boolean	verify(String signature, Reader in) Verifies the signature on the given stream.
boolean	verify(String signature, String str) Verifies the signature on the given string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataSigner

public DataSigner()
           throws DecryptionException

Constructor.

Throws:

DecryptionException

DataSigner

public DataSigner(KeyPair keyPair)
           throws DecryptionException

Constructor from key pair.

Parameters:

keyPair - the key pair to be used

Throws:

DecryptionException

DataSigner

public DataSigner(PrivateKey privateKey,
          PublicKey publicKey)
           throws DecryptionException

Constructor from key pair.

Parameters:

privateKey - private key

publicKey - public key

Throws:

DecryptionException

DataSigner

public DataSigner(PrivateKey privateKey)
           throws DecryptionException

Constructor from private key.

Parameters:

privateKey - the private key to be used

Throws:

DecryptionException

DataSigner

public DataSigner(PublicKey publicKey)
           throws DecryptionException

Constructor from public key.

Parameters:

publicKey - the public key to be used

Throws:

DecryptionException

Method Detail

getPrivateKey

public PrivateKey getPrivateKey()

Returns the privateKey.

Returns:

the privateKey

setPrivateKey

public void setPrivateKey(PrivateKey privateKey)

Sets the privateKey.

Parameters:

privateKey - the privateKey to set

setPrivateKey

public void setPrivateKey(String privateKey)
                   throws SigningException

Sets the privateKey.

Parameters:

privateKey - the privateKey to set

Throws:

SigningException

getPublicKey

public PublicKey getPublicKey()

Returns the publicKey.

Returns:

the publicKey

setPublicKey

public void setPublicKey(PublicKey publicKey)

Sets the publicKey.

Parameters:

publicKey - the publicKey to set

setPublicKey

public void setPublicKey(String publicKey)
                  throws SigningException

Sets the publicKey.

Parameters:

publicKey - the publicKey to set

Throws:

SigningException

sign

public String sign(Reader reader)
            throws SigningException

Creates a signature for the given stream.

Parameters:

reader - stream to be signed

Returns:

signature of the provided stream

Throws:

SigningException

getByteSignature

public byte[] getByteSignature(Reader reader)
                        throws SigningException

Creates a signature for the given stream.

Parameters:

reader - stream to be signed

Returns:

signature of the provided stream

Throws:

SigningException

sign

public String sign(InputStream in)
            throws SigningException

Creates a signature for the given stream.

Parameters:

in - stream to be signed

Returns:

signature of the provided stream

Throws:

SigningException

getByteSignature

public byte[] getByteSignature(InputStream in)
                        throws SigningException

Creates a signature for the given stream.

Parameters:

in - stream to be signed

Returns:

signature of the provided stream

Throws:

SigningException

update

public void update(Signature signature,
          InputStream in)
            throws SigningException

Updates the DSA with the bytes from this stream.

Parameters:

signature - signature

in - input stream

Throws:

SigningException - when the stream cannot be signed

update

protected void update(Signature signature,
          Reader reader)
               throws SigningException

Updates the DSA with the bytes from this stream.

Parameters:

signature - signature

reader - reader for the input stream

Throws:

SigningException - when the signing process fails

sign

public String sign(String str)
            throws SigningException

Creates a signature for the given string.

Parameters:

str - string to be signed

Returns:

signature of the provided String

Throws:

SigningException - when the stream cannot be signed

getByteSignature

public byte[] getByteSignature(String str)
                        throws SigningException

Creates a signature for the given string.

Parameters:

str - string to be signed

Returns:

signature of the provided String

Throws:

SigningException - when the stream cannot be signed

sign

public String sign(byte[] bytes)
            throws SigningException

Creates a signature for the given bytes.

Parameters:

bytes - bytes to be signed

Returns:

signature of the provided bytes

Throws:

SigningException - when the bytes cannot be signed

getByteSignature

public byte[] getByteSignature(byte[] bytes)
                        throws SigningException

Creates a signature for the given bytes.

Parameters:

bytes - bytes to be signed

Returns:

signature of the provided bytes

Throws:

SigningException - when the bytes cannot be signed

verify

public boolean verify(String signature,
             InputStream in)
               throws SigningException

Verifies the signature on the given stream.

Parameters:

signature - signature

in - stream to be verified

Returns:

true if the signature confirms stream integrity

Throws:

SigningException - when the signature cannot be verified

verify

public boolean verify(byte[] signature,
             InputStream in)
               throws SigningException

Verifies the signature on the given stream.

Parameters:

signature - signature

in - stream to be verified

Returns:

true if the signature confirms stream integrity

Throws:

SigningException - when the signature cannot be verified

verify

public boolean verify(String signature,
             Reader in)
               throws SigningException

Verifies the signature on the given stream.

Parameters:

signature - signature

in - stream to be verified

Returns:

true if the signature confirms stream integrity

Throws:

SigningException - when the signature cannot be verified

verify

public boolean verify(byte[] signature,
             Reader in)
               throws SigningException

Verifies the signature on the given stream.

Parameters:

signature - signature

in - stream to be verified

Returns:

true if the signature confirms stream integrity

Throws:

SigningException - when the signature cannot be verified

verify

public boolean verify(String signature,
             String str)
               throws SigningException

Verifies the signature on the given string.

Parameters:

signature - signature

str - string to be verified

Returns:

true if the signature confirms string integrity

Throws:

SigningException - when the signature cannot be verified

verify

public boolean verify(byte[] signature,
             byte[] data)
               throws SigningException

Verifies the signature on the given bytes.

Parameters:

signature - signature

data - bytes to be verified

Returns:

true if the signature confirms data integrity

Throws:

SigningException - when the signature cannot be verified