net.sourceforge.jcetaglib.lib
Class Signatures

java.lang.Object
  net.sourceforge.jcetaglib.lib.Signatures

public class Signatures

extends java.lang.Object

Create and verify SIGs (Signatures) with the BouncyCastle JCE provider

Version:

$Id: Signatures.java,v 1.3 2004/04/15 07:28:25 hamgert Exp $

Author:

Gert Van Ham, hamgert@users.sourceforge.net, http://jcetaglib.sourceforge.net

Constructor Summary

Signatures()

Method Summary

static java.lang.StringBuffer	generateFileSIG(java.lang.String file, java.security.PrivateKey signingKey, java.lang.String signame) Generates and returns a SIG (Signature) from a file
static void	generateSIG(java.io.InputStream is, java.io.DataOutputStream daos, java.security.PrivateKey signingKey, java.lang.String signame, int bufferlength) Generates and returns a SIG (Signature) from any inputstream
static java.lang.StringBuffer	generateSIG(java.lang.StringBuffer text, java.security.PrivateKey signingKey, java.lang.String signame) Generates and returns a SIG (Signature) from a text
static boolean	verifyFileSIG(java.lang.String file, java.lang.StringBuffer signature, java.security.PublicKey verifyKey, java.lang.String signame) Verifies a signature from a file
static boolean	verifySIG(java.io.InputStream is, java.lang.StringBuffer signature, java.security.PublicKey verifyKey, java.lang.String signame, int bufferlength) Verifies a signature from any inputstream
static boolean	verifySIG(java.lang.StringBuffer text, java.lang.StringBuffer signature, java.security.PublicKey verifyKey, java.lang.String signame) Verifies a signature from a text

Methods inherited from class java.lang.Object

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

Constructor Detail

Signatures

public Signatures()

Method Detail

generateSIG

public static java.lang.StringBuffer generateSIG(java.lang.StringBuffer text,
                                                 java.security.PrivateKey signingKey,
                                                 java.lang.String signame)
                                          throws CryptoException

Generates and returns a SIG (Signature) from a text

Parameters:

text - text to create SIG from

signingKey - the signing key

signame - Signature algorithm (e.g. RIPEMD160WithRSA/ISO9796-2)

Returns:

SIG in BASE64 format

Throws:

CryptoException - for all encryption errors

generateFileSIG

public static java.lang.StringBuffer generateFileSIG(java.lang.String file,
                                                     java.security.PrivateKey signingKey,
                                                     java.lang.String signame)
                                              throws CryptoException

Generates and returns a SIG (Signature) from a file

Parameters:

file - file to create SIG from

signingKey - the signing key

signame - Signature algorithm (e.g. RIPEMD160WithRSA/ISO9796-2)

Returns:

SIG in BASE64 format

Throws:

CryptoException - for all encryption errors

generateSIG

public static void generateSIG(java.io.InputStream is,
                               java.io.DataOutputStream daos,
                               java.security.PrivateKey signingKey,
                               java.lang.String signame,
                               int bufferlength)
                        throws CryptoException,
                               java.io.IOException

Generates and returns a SIG (Signature) from any inputstream

Parameters:

is - inputstream to generate SIG from

daos - returns SIG code outputstream

signingKey - the signing key

signame - Signature algorithm (e.g. RIPEMD160WithRSA/ISO9796-2)

Throws:

java.io.IOException - I/O errors

CryptoException - for all encryption errors

verifySIG

public static boolean verifySIG(java.lang.StringBuffer text,
                                java.lang.StringBuffer signature,
                                java.security.PublicKey verifyKey,
                                java.lang.String signame)
                         throws CryptoException

Verifies a signature from a text

Parameters:

text - text to verify

signature - the signature (in BASE64 format)

verifyKey - the verification key

signame - Signature algorithm (e.g. RIPEMD160WithRSA/ISO9796-2)

Returns:

true (verified) or false (invalid)

Throws:

CryptoException - for encryption errors

verifyFileSIG

public static boolean verifyFileSIG(java.lang.String file,
                                    java.lang.StringBuffer signature,
                                    java.security.PublicKey verifyKey,
                                    java.lang.String signame)
                             throws CryptoException

Verifies a signature from a file

Parameters:

file - file to verify

signature - the signature (in BASE64 format)

verifyKey - the verification key

signame - Signature algorithm (e.g. RIPEMD160WithRSA/ISO9796-2)

Returns:

true (verified) or false (invalid)

Throws:

CryptoException - for encryption errors

verifySIG

public static boolean verifySIG(java.io.InputStream is,
                                java.lang.StringBuffer signature,
                                java.security.PublicKey verifyKey,
                                java.lang.String signame,
                                int bufferlength)
                         throws CryptoException,
                                java.io.IOException

Verifies a signature from any inputstream

Parameters:

is - inputstream to verify

signature - the signature (in BASE64 format)

verifyKey - the verification key

signame - Signature algorithm (e.g. RIPEMD160WithRSA/ISO9796-2)

bufferlength - buffer length in bytes

Returns:

true (verified) or false (invalid)

Throws:

java.io.IOException - I/O errors

CryptoException - for all encryption errors