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ee.sk.digidoc.factory.PKCS11SignatureFactory Maven / Gradle / Ivy
/*
* PKCS11SignatureFactory.java
* PROJECT: JDigiDoc
* DESCRIPTION: Digi Doc functions for creating
* and reading signed documents.
* AUTHOR: Veiko Sinivee, Sunset Software OÜ
*==================================================
* Copyright (C) AS Sertifitseerimiskeskus
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* GNU Lesser General Public Licence is available at
* http://www.gnu.org/copyleft/lesser.html
*==================================================
*/
package ee.sk.digidoc.factory;
import ee.sk.digidoc.Base64Util;
import ee.sk.digidoc.DigiDocException;
import ee.sk.digidoc.Signature;
import ee.sk.digidoc.SignedDoc;
//import ee.sk.digidoc.SignedDoc;
import java.security.*;
import java.security.cert.*;
import iaik.pkcs.pkcs11.*;
import iaik.pkcs.pkcs11.objects.*;
import iaik.pkcs.pkcs11.wrapper.PKCS11Constants;
import ee.sk.utils.ConfigManager;
import ee.sk.utils.ConvertUtils;
import java.io.IOException;
//import java.io.File;
import java.io.ByteArrayInputStream;
import java.util.Vector;
import org.apache.log4j.Logger;
import ee.sk.digidoc.TokenKeyInfo;
/**
* PKCS#11 based signature implementation
* @author Veiko Sinivee
* @version 1.0
*/
public class PKCS11SignatureFactory implements SignatureFactory
{
/** Object represent a current PKCS#11 module. */
private Module m_pkcs11Module;
/** An array of available tokens. */
private TokenKeyInfo[] m_tokens;
/** A current session object are used to perform cryptographic operations on a token. */
private Session m_currentSession;
/** selected (current token) */
private TokenKeyInfo m_selToken;
/** security provider */
private Provider m_secProvider;
/** log4j logger */
private static Logger m_logger = Logger.getLogger(PKCS11SignatureFactory.class);
/** PKCS#11 module is initialized */
private static boolean m_isInitialized;
/** Creates new PKCS11SignatureFactory */
public PKCS11SignatureFactory() {
m_pkcs11Module = null;
m_tokens = null;
m_currentSession = null;
m_selToken = null;
m_secProvider = null;
m_isInitialized = false;
}
/**
* initializes the implementation class
*/
public void init()
throws DigiDocException
{
if(m_pkcs11Module == null)
initPKCS11();
if(m_secProvider == null)
initProvider();
}
/**
* initializes the PKCS#11 subsystem
*/
public void initPKCS11()
throws DigiDocException
{
try {
if(m_logger.isInfoEnabled())
m_logger.info("Loading PKCS11 driver: " + ConfigManager.
instance().getProperty("DIGIDOC_SIGN_PKCS11_DRIVER") +
" libpath: " + System.getProperty("java.library.path"));
// load PKCS11 module
m_pkcs11Module = (Module)AccessController.doPrivileged(
new PrivilegedExceptionAction() {
public java.lang.Object run() throws IOException {
String moduleName = ConfigManager.
instance().getProperty("DIGIDOC_SIGN_PKCS11_DRIVER");
Module m = Module.getInstance(moduleName);
return m;
}
}
);
try {
if (!m_isInitialized) {
m_pkcs11Module.initialize(null); // initializes the module
m_isInitialized = true;
}
} catch(iaik.pkcs.pkcs11.wrapper.PKCS11Exception ex) {
m_logger.error("Pkcs11 error: " + ex);
if(ex.getErrorCode() == PKCS11Constants.CKR_CRYPTOKI_ALREADY_INITIALIZED) {
m_logger.error("PKCS11 already loaded ok");
m_isInitialized = true;
} else
DigiDocException.handleException(ex, DigiDocException.ERR_CRYPTO_DRIVER);
}
// read all token info
m_tokens = getTokenKeys();
} catch(Exception e) {
m_pkcs11Module = null; // reset since we had an error
DigiDocException.handleException(e, DigiDocException.ERR_CRYPTO_DRIVER);
}
if((m_tokens == null) || (m_tokens.length == 0))
throw new DigiDocException(DigiDocException.ERR_PKCS11_INIT,
"Error reading signature certificates from card!", null);
}
/**
* Reads all useable token keys
* @return list of available token/key info
* @throws DigiDocException
*/
public TokenKeyInfo[] getTokenKeys()
throws DigiDocException
{
Vector vec = new Vector();
Session sess = null;
try {
CertificateFactory certFac = CertificateFactory.getInstance("X.509");
Slot[] slots = m_pkcs11Module.getSlotList(Module.SlotRequirement.TOKEN_PRESENT);
int nNr = 0;
for(int i = 0; (slots != null) && (i < slots.length); i++) {
SlotInfo si = slots[i].getSlotInfo(); // get information about this slot object
if(m_logger.isDebugEnabled())
m_logger.debug("Slot " + i + ": " + si);
if(si.isTokenPresent()) { // indicates, if there is a token present in this slot
Token tok = slots[i].getToken();
if(m_logger.isDebugEnabled())
m_logger.debug("Token: " + tok);
sess = tok.openSession(Token.SessionType.SERIAL_SESSION,
Token.SessionReadWriteBehavior.RO_SESSION,null,null);
X509PublicKeyCertificate templCert = new X509PublicKeyCertificate();
sess.findObjectsInit(templCert);
iaik.pkcs.pkcs11.objects.Object[] certs = null;
do {
certs = sess.findObjects(1); // find next cert
if(certs != null && certs.length > 0) {
if(m_logger.isDebugEnabled())
m_logger.debug("Certs: " + certs.length);
for(int j = 0; (certs != null) && (j < certs.length); j++) {
X509PublicKeyCertificate x509 = (X509PublicKeyCertificate)certs[j];
byte[] derCert = x509.getValue().getByteArrayValue();
X509Certificate cert = (X509Certificate)certFac.generateCertificate(new ByteArrayInputStream(derCert));
TokenKeyInfo tki = new TokenKeyInfo(nNr, slots[i].getSlotID(), tok, x509.getId().getByteArrayValue(), x509.getLabel().toString(), cert);
nNr++;
if(m_logger.isDebugEnabled())
m_logger.debug("Slot: " + i + " cert: " + j + " nr: " + tki.getCertSerial() + " CN: " + tki.getCertName() + " id: " + tki.getIdHex() + " signature: " + tki.isSignatureKey());
vec.add(tki);
}
} // loop until all certs read
} while(certs != null && certs.length > 0);
sess.closeSession();
sess = null;
}
}
} catch(Exception e) {
m_pkcs11Module = null; // reset since we had an error
DigiDocException.handleException(e, DigiDocException.ERR_CRYPTO_DRIVER);
} finally {
try {
if(sess != null)
sess.closeSession();
} catch(Exception ex) {
m_logger.error("Error closing session: " + ex);
}
}
TokenKeyInfo[] arr = new TokenKeyInfo[vec.size()];
for(int i = 0; i < vec.size(); i++)
arr[i] = (TokenKeyInfo)vec.elementAt(i);
return arr;
}
/**
* Initializes Java cryptography provider
*/
private void initProvider()
throws DigiDocException
{
try {
m_secProvider = (Provider)Class.forName(ConfigManager.
instance().getProperty("DIGIDOC_SECURITY_PROVIDER")).newInstance();
Security.addProvider(m_secProvider);
} catch(Exception ex) {
m_secProvider = null;
DigiDocException.handleException(ex, DigiDocException.ERR_CRYPTO_PROVIDER);
}
}
/**
* Finds keys of specific type
* @param bSign true if searching signature keys
* @return array of key infos
*/
public TokenKeyInfo[] getTokensOfType(boolean bSign)
{
int nToks = 0;
boolean bKeyUsageCheck = ConfigManager.instance().getBooleanProperty("KEY_USAGE_CHECK", true);
for (int i = 0; (m_tokens != null) && (i < m_tokens.length); i++) {
TokenKeyInfo tki = m_tokens[i];
if(m_logger.isDebugEnabled())
m_logger.debug("Token: " + i + " is-sign: " + tki.isSignatureKey() + " is-crypt: " + tki.isEncryptKey() + " nr: " + tki.getCertSerial() + " CN: " + tki.getCertName() + " id: " + tki.getIdHex());
if((bSign && (tki.isSignatureKey() || !bKeyUsageCheck)) || (!bSign && tki.isEncryptKey()))
nToks++;
}
TokenKeyInfo[] arr = new TokenKeyInfo[nToks];
for (int i = 0, j = 0; (m_tokens != null) && (i < m_tokens.length); i++) {
TokenKeyInfo tki = m_tokens[i];
if((bSign && (tki.isSignatureKey() || !bKeyUsageCheck)) || (!bSign && tki.isEncryptKey())) {
if(m_logger.isDebugEnabled())
m_logger.debug("Using token: " + i + " is-sign: " + tki.isSignatureKey() + " is-crypt: " + tki.isEncryptKey() + " nr: " + tki.getCertSerial() + " CN: " + tki.getCertName() + " id: " + tki.getIdHex());
arr[j++] = tki;
}
}
return arr;
}
/**
* Finds token with slot id and certificate label
* @param nSlotId slot id
* @param label cert label
* @return found token or null
*/
public TokenKeyInfo getTokenWithSlotIdAndLabel(long nSlotId, String label)
{
for (int i = 0; (m_tokens != null) && (i < m_tokens.length); i++) {
TokenKeyInfo tki = m_tokens[i];
if(tki.getSlot() == nSlotId && tki.getLabel().equals(label))
return tki;
}
return null;
}
/**
* Finds certificate slot id and certificate label
* @param nSlotId slot id
* @param label cert label
* @return found certificate or null
*/
public X509Certificate getCertificateWithSlotIdAndLabel(long nSlotId, String label)
{
TokenKeyInfo tki = getTokenWithSlotIdAndLabel(nSlotId, label);
if(tki != null)
return tki.getCert();
return null;
}
/**
* Returns a list of all available key names (cert CN)
* @return an array of all available key names (cert CN)
* @throws DigiDocException if reading the token information fails.
*/
public String[] getAvailableTokenNames()
throws DigiDocException
{
if(m_pkcs11Module == null)
initPKCS11();
String[] names = new String[m_tokens.length];
for (int i = 0; (m_tokens != null) && (i < m_tokens.length); i++) {
TokenKeyInfo tki = m_tokens[i]; // get information about this token
names[i] = tki.getCertName(); // get the label of this token
}
return names;
}
/**
* Method opens a new session to perfom operations on
* specified token and logs in the user
* or the security officer to the session.
* @param bSignSession true if we want to open a session with signature token
* @param token tokens order number
* @param pin the PIN.
* @throws DigiDocException if the session could not be opened or if login fails.
*/
public void openSession(TokenKeyInfo tki, String pin)
throws DigiDocException
{
if(m_pkcs11Module == null)
initPKCS11();
try {
// close the old session if necessary
if(m_currentSession != null)
closeSession();
if(m_logger.isDebugEnabled())
m_logger.debug("Open session for token: " + tki);
if(m_logger.isDebugEnabled())
m_logger.debug("Open session for: " +
((tki != null) ? tki.getCertName() + " id: " + tki.getIdHex() +
" sign: " + tki.isSignatureKey() + " crypt: " + tki.isEncryptKey() : "NULL"));
if(tki != null) {
// open a new session to perfom operations on this token
m_currentSession = tki.getToken().
openSession(Token.SessionType.SERIAL_SESSION,
Token.SessionReadWriteBehavior.RO_SESSION,null,null);
m_selToken = tki;
}
else
if(m_logger.isDebugEnabled())
m_logger.debug("No suitable token found!");
// logs in the user or the security officer to the session
if(m_currentSession != null && m_selToken != null) {
if(m_logger.isDebugEnabled())
m_logger.debug("Login for: " + m_selToken.getCertName() + " id: " + m_selToken.getIdHex());
try {
m_currentSession.login(Session.UserType.USER, pin.toCharArray());
} catch(iaik.pkcs.pkcs11.wrapper.PKCS11Exception ex) {
m_logger.error("Pkcs11 error: " + ex);
if(ex.getErrorCode() == PKCS11Constants.CKR_USER_ALREADY_LOGGED_IN) {
m_logger.error("User already logged in ok");
} else
DigiDocException.handleException(ex, DigiDocException.ERR_TOKEN_LOGIN);
}
}
} catch(TokenException e) {
m_selToken = null;
m_currentSession = null;
DigiDocException.handleException(e, DigiDocException.ERR_TOKEN_LOGIN);
}
}
/**
* Method opens a new session to perfom operations on
* specified token and logs in the user
* or the security officer to the session.
* @param bSignSession true if we want to open a session with signature token
* @param token tokens order number
* @param pin the PIN.
* @throws DigiDocException if the session could not be opened or if login fails.
*/
public void openSession(boolean bSignSession, int token, String pin)
throws DigiDocException
{
if(m_pkcs11Module == null)
initPKCS11();
try {
// don't login if the session exists
if(m_currentSession == null || m_selToken == null ||
(bSignSession && !m_selToken.isSignatureKey()) ||
(!bSignSession && m_selToken.isSignatureKey())) {
// close the old session if necessary
if(m_currentSession != null)
closeSession();
if(m_logger.isDebugEnabled())
m_logger.debug("Open session for token: " + token);
TokenKeyInfo tki = null;
TokenKeyInfo[] tkis = getTokensOfType(bSignSession);
if(token >= 0 && tkis != null && token < tkis.length)
tki = tkis[token];
if(m_logger.isDebugEnabled())
m_logger.debug("Open " + (bSignSession ? "sign" : "auth") + " session for: " +
((tki != null) ? tki.getCertName() + " id: " + tki.getIdHex() +
" sign: " + tki.isSignatureKey() + " crypt: " + tki.isEncryptKey() : "NULL"));
if(tki != null) {
// open a new session to perfom operations on this token
m_currentSession = tki.getToken().
openSession(Token.SessionType.SERIAL_SESSION,
Token.SessionReadWriteBehavior.RO_SESSION,null,null);
m_selToken = tki;
}
else
if(m_logger.isDebugEnabled())
m_logger.debug("No suitable token found!");
// logs in the user or the security officer to the session
if(m_currentSession != null && m_selToken != null) {
if(m_logger.isDebugEnabled())
m_logger.debug("Login for: " + m_selToken.getCertName() + " id: " + m_selToken.getIdHex() /*+ " PIN: \'" + pin + "\'"*/);
try {
m_currentSession.login(Session.UserType.USER, pin.toCharArray());
} catch(iaik.pkcs.pkcs11.wrapper.PKCS11Exception ex) {
m_logger.error("Pkcs11 error: " + ex);
if(ex.getErrorCode() == PKCS11Constants.CKR_USER_ALREADY_LOGGED_IN) {
m_logger.error("User already logged in ok");
} else
DigiDocException.handleException(ex, DigiDocException.ERR_TOKEN_LOGIN);
}
}
}
} catch(TokenException e) {
m_selToken = null;
m_currentSession = null;
DigiDocException.handleException(e, DigiDocException.ERR_TOKEN_LOGIN);
}
}
byte[] tsign = { 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF,
0x10, 0x11, 0x12, 0x13 };
/**
* Method returns a digital signature. It finds the RSA private
* key object from the active token and
* then signs the given data with this key and RSA mechanism.
* @param digest digest of the data to be signed.
* @param token token index
* @param pin users pin code
* @param sig Signature object to provide info about desired signature method
* @return an array of bytes containing digital signature.
* @throws DigiDocException if signing the data fails.
*/
public byte[] sign(byte[] digest, int token, String pin, Signature sig)
throws DigiDocException
{
byte[] sigVal = null;
if(m_currentSession == null)
openSession(true, token, pin);
try {
if(m_logger.isDebugEnabled())
m_logger.debug("Sign with token: " + token + " key: " +
((m_selToken != null) ? m_selToken.getCertName() : "NULL") + " id: " +
((m_selToken != null) ? m_selToken.getIdHex() : "NULL") +
" dig-len: " + ((digest != null) ? digest.length : 0) + " dig: " +
((digest != null) ? Base64Util.encode(digest) : "NULL"));
// the RSA private key object that serves as a template for searching
RSAPrivateKey tempKey = new RSAPrivateKey();
// initializes a find operations to find RSA private key objects
m_currentSession.findObjectsInit(tempKey);
// find first
iaik.pkcs.pkcs11.objects.Object[] keys = null;
RSAPrivateKey sigKey = null;
boolean bFound = false;
do {
keys = m_currentSession.findObjects(1);
if(keys != null && keys.length > 0) {
for(int i = 0; !bFound && i < keys.length; i++) {
sigKey = (RSAPrivateKey)keys[i];
String keyIdHex = SignedDoc.bin2hex(sigKey.getId().getByteArrayValue());
if(m_logger.isDebugEnabled())
m_logger.debug("Key " + i + " id: " + keyIdHex);
if(keyIdHex != null && m_selToken.getIdHex() != null && keyIdHex.equals(m_selToken.getIdHex())) {
if(m_logger.isDebugEnabled())
m_logger.debug("Using key " + i + " id: " + keyIdHex);
Mechanism sigMech = Mechanism.RSA_PKCS;
// initializes a new signing operation
m_currentSession.signInit(sigMech, sigKey);
byte[] ddata = ConvertUtils.addDigestAsn1Prefix(digest);
sigVal = m_currentSession.sign(ddata); // signs the given data with the key and mechanism given to the signInit method
if(m_logger.isDebugEnabled())
m_logger.debug("Signature len: " + ((sigVal != null) ? sigVal.length : 0));
break;
}
} // for
} // if keys found
} while(!bFound && keys != null && keys.length > 0);
m_currentSession.findObjectsFinal(); // finalizes a find operation
// close session
closeSession();
} catch(TokenException e) {
DigiDocException.handleException(e, DigiDocException.ERR_SIGN);
}
return sigVal;
}
/**
* Method returns a digital signature. It finds the RSA private
* key object from the active token and
* then signs the given data with this key and RSA mechanism.
* @param digest digest of the data to be signed.
* @param nSlotId slot id
* @param certLabel cert label
* @param pin users pin code
* @param sig Signature object to provide info about desired signature method
* @return an array of bytes containing digital signature.
* @throws DigiDocException if signing the data fails.
*/
public byte[] sign(byte[] digest, long nSlotId, String certLabel, String pin, Signature sig)
throws DigiDocException
{
byte[] sigVal = null;
TokenKeyInfo tki = getTokenWithSlotIdAndLabel(nSlotId, certLabel);
if(tki == null) {
m_logger.error("No token with slot: " + nSlotId + " and label: " + certLabel + " found!");
return null;
}
if(m_currentSession == null)
openSession(tki, pin);
try {
if(m_logger.isDebugEnabled())
m_logger.debug("Sign with token: " + tki + " key: " +
((m_selToken != null) ? m_selToken.getCertName() : "NULL") + " id: " +
((m_selToken != null) ? m_selToken.getIdHex() : "NULL") +
" dig-len: " + ((digest != null) ? digest.length : 0) + " dig: " +
((digest != null) ? Base64Util.encode(digest) : "NULL"));
// the RSA private key object that serves as a template for searching
RSAPrivateKey tempKey = new RSAPrivateKey();
// initializes a find operations to find RSA private key objects
m_currentSession.findObjectsInit(tempKey);
// find first
iaik.pkcs.pkcs11.objects.Object[] foundKeys = null;
boolean bFound = false;
do {
foundKeys = m_currentSession.findObjects(1);
if(foundKeys != null && foundKeys.length > 0) {
RSAPrivateKey sigKey = null;
if(m_logger.isDebugEnabled())
m_logger.debug("Keys: " + foundKeys.length);
for(int i = 0; !bFound && (i < foundKeys.length); i++) {
sigKey = (RSAPrivateKey)foundKeys[i];
String keyLabel = null;
if(sigKey.getLabel() != null) {
keyLabel = sigKey.getLabel().toString();
if(m_logger.isDebugEnabled())
m_logger.debug("Key " + i + " label: " + keyLabel);
}
if(keyLabel != null && m_selToken.getLabel() != null && keyLabel.equals(m_selToken.getLabel())) {
if(m_logger.isDebugEnabled())
m_logger.debug("Using key " + i + " label: " + keyLabel);
bFound = true;
Mechanism sigMech = Mechanism.RSA_PKCS;
// initializes a new signing operation
m_currentSession.signInit(sigMech, sigKey);
byte[] ddata = ConvertUtils.addDigestAsn1Prefix(digest);
sigVal = m_currentSession.sign(ddata); // signs the given data with the key and mechanism given to the signInit method
if(m_logger.isDebugEnabled())
m_logger.debug("Signature len: " + ((sigVal != null) ? sigVal.length : 0));
break;
}
}
} // if keys found
} while(!bFound && foundKeys != null && foundKeys.length > 0);
if(!bFound)
m_logger.error("Failed to sign, token with slot: " + nSlotId + " and label: " + certLabel + " not found!");
m_currentSession.findObjectsFinal(); // finalizes a find operation
// close session
closeSession();
} catch(TokenException e) {
DigiDocException.handleException(e, DigiDocException.ERR_SIGN);
}
return sigVal;
}
/**
* Method returns a X.509 certificate object readed
* from the active token and representing an
* user public key certificate value.
* @return X.509 certificate object.
* @throws DigiDocException if getting X.509 public key certificate
* fails or the requested certificate type X.509 is not available in
* the default provider package
*/
public X509Certificate getCertificate(int token, String pin)
throws DigiDocException
{
if(m_logger.isDebugEnabled())
m_logger.debug("Get cert in slot: " + token);
if(m_currentSession == null)
openSession(true, token, pin);
if(m_logger.isDebugEnabled())
m_logger.debug("Got cert in slot: " + token + " nr: " + m_selToken.getNr() + " sign: " + m_selToken.isSignatureKey() + " enc: " + m_selToken.isEncryptKey());
if(m_selToken != null)
return m_selToken.getCert();
return null;
}
/**
* Method returns a X.509 certificate object readed
* from the active token and representing an
* user public key certificate value.
* @return X.509 certificate object.
* @throws DigiDocException if getting X.509 public key certificate
* fails or the requested certificate type X.509 is not available in
* the default provider package
*/
public X509Certificate getAuthCertificate(int token, String pin)
throws DigiDocException
{
if(m_currentSession == null)
openSession(false, token, pin);
if(m_logger.isDebugEnabled())
m_logger.debug("Get cert for token: " + token);
if(m_selToken != null)
return m_selToken.getCert();
return null;
}
/**
* Method decrypts the data with the RSA private key
* corresponding to this certificate (which was used
* to encrypt it). Decryption will be done on the card.
* This operation closes the possibly opened previous
* session with signature token and opens a new one with
* authentication tokne if necessary
* @param data data to be decrypted.
* @param token index of authentication token
* @param pin PIN code
* @return decrypted data.
* @throws DigiDocException for all decryption errors
*/
public byte[] decrypt(byte[] data, int token, String pin)
throws DigiDocException
{
byte[] value = null;
if(m_currentSession == null) {
openSession(false, token, pin);
}
try {
if(m_logger.isDebugEnabled()) {
m_logger.debug("Decrypting " + data.length + " bytes");
m_logger.debug("Decrypting with token: " + m_selToken.getNr());
m_logger.debug("session: " + m_currentSession);
}
RSAPrivateKey authKey = new RSAPrivateKey(); // the RSA private key object that serves as a template for searching
m_currentSession.findObjectsInit(authKey); // initializes a find operations to find RSA private key objects
iaik.pkcs.pkcs11.objects.Object[] keys = null;
boolean bFound = false;
do {
keys = m_currentSession.findObjects(1);
if(keys != null && keys.length > 0) {
RSAPrivateKey key = null;
for(int i = 0; !bFound && (i < keys.length); i++) {
key = (RSAPrivateKey)keys[i];
String keyIdHex = null;
if(key.getId() != null) {
keyIdHex = SignedDoc.bin2hex(key.getId().getByteArrayValue());
if(m_logger.isDebugEnabled())
m_logger.debug("Key " + i + " id: " + keyIdHex);
}
if(keyIdHex != null && m_selToken.getIdHex() != null && keyIdHex.equals(m_selToken.getIdHex())) {
bFound = true;
if(m_logger.isDebugEnabled())
m_logger.debug("Using key " + i + " id: " + keyIdHex);
Mechanism m = Mechanism.RSA_PKCS;
m_currentSession.decryptInit(m, key); // initializes a new signing operation
if(m_logger.isDebugEnabled())
m_logger.debug("decryptInit OK");
value = m_currentSession.decrypt(data);
if(m_logger.isDebugEnabled())
m_logger.debug("value = " + value);
break;
} // end if
}
} // if keys found
} while(!bFound && keys != null && keys.length > 0);
if(m_logger.isInfoEnabled())
m_logger.info("Decrypted " + ((data != null) ? data.length : 0) + " bytes, got: " + value.length);
m_currentSession.findObjectsFinal(); // finalizes a find operation
// close session
closeSession();
} catch (TokenException e) {
DigiDocException.handleException(e, DigiDocException.ERR_XMLENC_DECRYPT);
} // end catch
return value;
}
/**
* Method decrypts the data with the RSA private key
* corresponding to this certificate (which was used
* to encrypt it). Decryption will be done on the card.
* This operation closes the possibly opened previous
* session with signature token and opens a new one with
* authentication tokne if necessary
* @param data data to be decrypted.
* @param slot slot id
* @param label token label
* @param pin PIN code
* @return decrypted data.
* @throws DigiDocException for all decryption errors
*/
public byte[] decrypt(byte[] data, long slot, String label, String pin)
throws DigiDocException
{
byte[] value = null;
TokenKeyInfo tki = getTokenWithSlotIdAndLabel(slot, label);
if(tki == null) {
m_logger.error("No token with slot: " + slot + " and label: " + label + " found!");
return null;
}
if(m_currentSession == null)
openSession(tki, pin);
try {
RSAPrivateKey authKey = new RSAPrivateKey(); // the RSA private key object that serves as a template for searching
m_currentSession.findObjectsInit(authKey); // initializes a find operations to find RSA private key objects
if(m_logger.isDebugEnabled()) {
m_logger.debug("Decrypting " + data.length + " bytes");
m_logger.debug("Decrypting with token: " + m_selToken.getNr());
m_logger.debug("session: " + m_currentSession);
}
RSAPrivateKey key = null;
boolean bFound = false;
iaik.pkcs.pkcs11.objects.Object[] keys = null;
do {
keys = m_currentSession.findObjects(1);
if(keys != null && keys.length > 0) {
for(int i = 0; !bFound && (i < keys.length); i++) {
key = (RSAPrivateKey)keys[i];
String keyLabel = null;
if(key.getLabel() != null) {
keyLabel = key.getLabel().toString();
if(m_logger.isDebugEnabled())
m_logger.debug("Key " + i + " label: " + keyLabel);
}
if(keyLabel != null && m_selToken.getLabel() != null && keyLabel.equals(m_selToken.getLabel())) {
if(m_logger.isDebugEnabled())
m_logger.debug("Using key " + i + " label: " + keyLabel);
bFound = true;
Mechanism m = Mechanism.RSA_PKCS;
m_currentSession.decryptInit(m, key); // initializes a new signing operation
if(m_logger.isDebugEnabled())
m_logger.debug("decryptInit OK");
value = m_currentSession.decrypt(data);
if(m_logger.isDebugEnabled())
m_logger.debug("value = " + value);
break;
} // end if
} // for
} // if keys
} while(!bFound && keys != null && keys.length > 0);
if(!bFound)
m_logger.error("Failed to sign, token with slot: " + slot + " and label: " + label + " not found!");
if(m_logger.isInfoEnabled())
m_logger.info("Decrypted " + ((data != null) ? data.length : 0) + " bytes, got: " + value.length);
m_currentSession.findObjectsFinal(); // finalizes a find operation
// close session
closeSession();
} catch (TokenException e) {
DigiDocException.handleException(e, DigiDocException.ERR_XMLENC_DECRYPT);
} // end catch
return value;
}
/**
* Method closes the current session.
* @throws DigiDocException if closing the session fails.
*/
public void closeSession()
throws DigiDocException
{
try {
if(m_logger.isDebugEnabled())
m_logger.debug("Closing card session");
// closes this session
if(m_currentSession != null)
m_currentSession.closeSession();
m_currentSession = null; // ???
} catch(TokenException e) {
DigiDocException.handleException(e, DigiDocException.ERR_TOKEN_LOGOUT);
}
}
/**
* This finalize method tries to finalize the module
* by calling finalize() of the PKCS#11 module.
* @throws DigiDocException if PKCS#11 module finalization fails.
*/
public void finalize()
throws DigiDocException
{
try {
if(m_pkcs11Module != null)
m_pkcs11Module.finalize(null); // finalizes this module
m_isInitialized = false;
m_pkcs11Module = null;
} catch(TokenException e) {
DigiDocException.handleException(e, DigiDocException.ERR_CRYPTO_FINALIZE);
}
}
/**
* Resets the previous session
* and other selected values
*/
public void reset()
throws DigiDocException
{
if(m_logger.isDebugEnabled())
m_logger.debug("Resetting PKCS11SignatureFactory");
m_selToken = null;
closeSession();
m_isInitialized = false;
m_pkcs11Module = null; //???
m_secProvider = null; //???
finalize();
}
/**
* Returns signature factory type identifier
* @return factory type identifier
*/
public String getType()
{
return SIGFAC_TYPE_PKCS11;
}
}
