Java example source code file (P11Cipher.java)
The P11Cipher.java Java example source code
/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.security.pkcs11;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Locale;
import java.security.*;
import java.security.spec.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import sun.nio.ch.DirectBuffer;
import sun.security.pkcs11.wrapper.*;
import static sun.security.pkcs11.wrapper.PKCS11Constants.*;
/**
* Cipher implementation class. This class currently supports
* DES, DESede, AES, ARCFOUR, and Blowfish.
*
* This class is designed to support ECB, CBC, CTR with NoPadding
* and ECB, CBC with PKCS5Padding. It will use its own padding impl
* if the native mechanism does not support padding.
*
* Note that PKCS#11 currently only supports ECB, CBC, and CTR.
* There are no provisions for other modes such as CFB, OFB, and PCBC.
*
* @author Andreas Sterbenz
* @since 1.5
*/
final class P11Cipher extends CipherSpi {
// mode constant for ECB mode
private final static int MODE_ECB = 3;
// mode constant for CBC mode
private final static int MODE_CBC = 4;
// mode constant for CTR mode
private final static int MODE_CTR = 5;
// padding constant for NoPadding
private final static int PAD_NONE = 5;
// padding constant for PKCS5Padding
private final static int PAD_PKCS5 = 6;
private static interface Padding {
// ENC: format the specified buffer with padding bytes and return the
// actual padding length
int setPaddingBytes(byte[] paddingBuffer, int padLen);
// DEC: return the length of trailing padding bytes given the specified
// padded data
int unpad(byte[] paddedData, int len)
throws BadPaddingException, IllegalBlockSizeException;
}
private static class PKCS5Padding implements Padding {
private final int blockSize;
PKCS5Padding(int blockSize)
throws NoSuchPaddingException {
if (blockSize == 0) {
throw new NoSuchPaddingException
("PKCS#5 padding not supported with stream ciphers");
}
this.blockSize = blockSize;
}
public int setPaddingBytes(byte[] paddingBuffer, int padLen) {
Arrays.fill(paddingBuffer, 0, padLen, (byte) (padLen & 0x007f));
return padLen;
}
public int unpad(byte[] paddedData, int len)
throws BadPaddingException, IllegalBlockSizeException {
if ((len < 1) || (len % blockSize != 0)) {
throw new IllegalBlockSizeException
("Input length must be multiples of " + blockSize);
}
byte padValue = paddedData[len - 1];
if (padValue < 1 || padValue > blockSize) {
throw new BadPaddingException("Invalid pad value!");
}
// sanity check padding bytes
int padStartIndex = len - padValue;
for (int i = padStartIndex; i < len; i++) {
if (paddedData[i] != padValue) {
throw new BadPaddingException("Invalid pad bytes!");
}
}
return padValue;
}
}
// token instance
private final Token token;
// algorithm name
private final String algorithm;
// name of the key algorithm, e.g. DES instead of algorithm DES/CBC/...
private final String keyAlgorithm;
// mechanism id
private final long mechanism;
// associated session, if any
private Session session;
// key, if init() was called
private P11Key p11Key;
// flag indicating whether an operation is initialized
private boolean initialized;
// falg indicating encrypt or decrypt mode
private boolean encrypt;
// mode, one of MODE_* above (MODE_ECB for stream ciphers)
private int blockMode;
// block size, 0 for stream ciphers
private final int blockSize;
// padding type, on of PAD_* above (PAD_NONE for stream ciphers)
private int paddingType;
// when the padding is requested but unsupported by the native mechanism,
// we use the following to do padding and necessary data buffering.
// padding object which generate padding and unpad the decrypted data
private Padding paddingObj;
// buffer for holding back the block which contains padding bytes
private byte[] padBuffer;
private int padBufferLen;
// original IV, if in MODE_CBC or MODE_CTR
private byte[] iv;
// number of bytes buffered internally by the native mechanism and padBuffer
// if we do the padding
private int bytesBuffered;
// length of key size in bytes; currently only used by AES given its oid
// specification mandates a fixed size of the key
private int fixedKeySize = -1;
P11Cipher(Token token, String algorithm, long mechanism)
throws PKCS11Exception, NoSuchAlgorithmException {
super();
this.token = token;
this.algorithm = algorithm;
this.mechanism = mechanism;
String algoParts[] = algorithm.split("/");
if (algoParts[0].startsWith("AES")) {
blockSize = 16;
int index = algoParts[0].indexOf('_');
if (index != -1) {
// should be well-formed since we specify what we support
fixedKeySize = Integer.parseInt(algoParts[0].substring(index+1))/8;
}
keyAlgorithm = "AES";
} else {
keyAlgorithm = algoParts[0];
if (keyAlgorithm.equals("RC4") ||
keyAlgorithm.equals("ARCFOUR")) {
blockSize = 0;
} else { // DES, DESede, Blowfish
blockSize = 8;
}
}
this.blockMode =
(algoParts.length > 1 ? parseMode(algoParts[1]) : MODE_ECB);
String defPadding = (blockSize == 0 ? "NoPadding" : "PKCS5Padding");
String paddingStr =
(algoParts.length > 2 ? algoParts[2] : defPadding);
try {
engineSetPadding(paddingStr);
} catch (NoSuchPaddingException nspe) {
// should not happen
throw new ProviderException(nspe);
}
}
protected void engineSetMode(String mode) throws NoSuchAlgorithmException {
// Disallow change of mode for now since currently it's explicitly
// defined in transformation strings
throw new NoSuchAlgorithmException("Unsupported mode " + mode);
}
private int parseMode(String mode) throws NoSuchAlgorithmException {
mode = mode.toUpperCase(Locale.ENGLISH);
int result;
if (mode.equals("ECB")) {
result = MODE_ECB;
} else if (mode.equals("CBC")) {
if (blockSize == 0) {
throw new NoSuchAlgorithmException
("CBC mode not supported with stream ciphers");
}
result = MODE_CBC;
} else if (mode.equals("CTR")) {
result = MODE_CTR;
} else {
throw new NoSuchAlgorithmException("Unsupported mode " + mode);
}
return result;
}
// see JCE spec
protected void engineSetPadding(String padding)
throws NoSuchPaddingException {
paddingObj = null;
padBuffer = null;
padding = padding.toUpperCase(Locale.ENGLISH);
if (padding.equals("NOPADDING")) {
paddingType = PAD_NONE;
} else if (padding.equals("PKCS5PADDING")) {
if (this.blockMode == MODE_CTR) {
throw new NoSuchPaddingException
("PKCS#5 padding not supported with CTR mode");
}
paddingType = PAD_PKCS5;
if (mechanism != CKM_DES_CBC_PAD && mechanism != CKM_DES3_CBC_PAD &&
mechanism != CKM_AES_CBC_PAD) {
// no native padding support; use our own padding impl
paddingObj = new PKCS5Padding(blockSize);
padBuffer = new byte[blockSize];
}
} else {
throw new NoSuchPaddingException("Unsupported padding " + padding);
}
}
// see JCE spec
protected int engineGetBlockSize() {
return blockSize;
}
// see JCE spec
protected int engineGetOutputSize(int inputLen) {
return doFinalLength(inputLen);
}
// see JCE spec
protected byte[] engineGetIV() {
return (iv == null) ? null : iv.clone();
}
// see JCE spec
protected AlgorithmParameters engineGetParameters() {
if (iv == null) {
return null;
}
IvParameterSpec ivSpec = new IvParameterSpec(iv);
try {
AlgorithmParameters params =
AlgorithmParameters.getInstance(keyAlgorithm,
P11Util.getSunJceProvider());
params.init(ivSpec);
return params;
} catch (GeneralSecurityException e) {
// NoSuchAlgorithmException, NoSuchProviderException
// InvalidParameterSpecException
throw new ProviderException("Could not encode parameters", e);
}
}
// see JCE spec
protected void engineInit(int opmode, Key key, SecureRandom random)
throws InvalidKeyException {
try {
implInit(opmode, key, null, random);
} catch (InvalidAlgorithmParameterException e) {
throw new InvalidKeyException("init() failed", e);
}
}
// see JCE spec
protected void engineInit(int opmode, Key key,
AlgorithmParameterSpec params, SecureRandom random)
throws InvalidKeyException, InvalidAlgorithmParameterException {
byte[] ivValue;
if (params != null) {
if (params instanceof IvParameterSpec == false) {
throw new InvalidAlgorithmParameterException
("Only IvParameterSpec supported");
}
IvParameterSpec ivSpec = (IvParameterSpec) params;
ivValue = ivSpec.getIV();
} else {
ivValue = null;
}
implInit(opmode, key, ivValue, random);
}
// see JCE spec
protected void engineInit(int opmode, Key key, AlgorithmParameters params,
SecureRandom random)
throws InvalidKeyException, InvalidAlgorithmParameterException {
byte[] ivValue;
if (params != null) {
try {
IvParameterSpec ivSpec =
params.getParameterSpec(IvParameterSpec.class);
ivValue = ivSpec.getIV();
} catch (InvalidParameterSpecException e) {
throw new InvalidAlgorithmParameterException
("Could not decode IV", e);
}
} else {
ivValue = null;
}
implInit(opmode, key, ivValue, random);
}
// actual init() implementation
private void implInit(int opmode, Key key, byte[] iv,
SecureRandom random)
throws InvalidKeyException, InvalidAlgorithmParameterException {
cancelOperation();
if (fixedKeySize != -1 && key.getEncoded().length != fixedKeySize) {
throw new InvalidKeyException("Key size is invalid");
}
switch (opmode) {
case Cipher.ENCRYPT_MODE:
encrypt = true;
break;
case Cipher.DECRYPT_MODE:
encrypt = false;
break;
default:
throw new InvalidAlgorithmParameterException
("Unsupported mode: " + opmode);
}
if (blockMode == MODE_ECB) { // ECB or stream cipher
if (iv != null) {
if (blockSize == 0) {
throw new InvalidAlgorithmParameterException
("IV not used with stream ciphers");
} else {
throw new InvalidAlgorithmParameterException
("IV not used in ECB mode");
}
}
} else { // MODE_CBC or MODE_CTR
if (iv == null) {
if (encrypt == false) {
String exMsg =
(blockMode == MODE_CBC ?
"IV must be specified for decryption in CBC mode" :
"IV must be specified for decryption in CTR mode");
throw new InvalidAlgorithmParameterException(exMsg);
}
// generate random IV
if (random == null) {
random = new SecureRandom();
}
iv = new byte[blockSize];
random.nextBytes(iv);
} else {
if (iv.length != blockSize) {
throw new InvalidAlgorithmParameterException
("IV length must match block size");
}
}
}
this.iv = iv;
p11Key = P11SecretKeyFactory.convertKey(token, key, keyAlgorithm);
try {
initialize();
} catch (PKCS11Exception e) {
throw new InvalidKeyException("Could not initialize cipher", e);
}
}
private void cancelOperation() {
if (initialized == false) {
return;
}
initialized = false;
if ((session == null) || (token.explicitCancel == false)) {
return;
}
// cancel operation by finishing it
int bufLen = doFinalLength(0);
byte[] buffer = new byte[bufLen];
try {
if (encrypt) {
token.p11.C_EncryptFinal(session.id(), 0, buffer, 0, bufLen);
} else {
token.p11.C_DecryptFinal(session.id(), 0, buffer, 0, bufLen);
}
} catch (PKCS11Exception e) {
throw new ProviderException("Cancel failed", e);
} finally {
reset();
}
}
private void ensureInitialized() throws PKCS11Exception {
if (initialized == false) {
initialize();
}
}
private void initialize() throws PKCS11Exception {
if (session == null) {
session = token.getOpSession();
}
CK_MECHANISM mechParams = (blockMode == MODE_CTR?
new CK_MECHANISM(mechanism, new CK_AES_CTR_PARAMS(iv)) :
new CK_MECHANISM(mechanism, iv));
try {
if (encrypt) {
token.p11.C_EncryptInit(session.id(), mechParams, p11Key.keyID);
} else {
token.p11.C_DecryptInit(session.id(), mechParams, p11Key.keyID);
}
} catch (PKCS11Exception ex) {
// release session when initialization failed
session = token.releaseSession(session);
throw ex;
}
bytesBuffered = 0;
padBufferLen = 0;
initialized = true;
}
// if update(inLen) is called, how big does the output buffer have to be?
private int updateLength(int inLen) {
if (inLen <= 0) {
return 0;
}
int result = inLen + bytesBuffered;
if (blockSize != 0 && blockMode != MODE_CTR) {
// minus the number of bytes in the last incomplete block.
result -= (result & (blockSize - 1));
}
return result;
}
// if doFinal(inLen) is called, how big does the output buffer have to be?
private int doFinalLength(int inLen) {
if (inLen < 0) {
return 0;
}
int result = inLen + bytesBuffered;
if (blockSize != 0 && encrypt && paddingType != PAD_NONE) {
// add the number of bytes to make the last block complete.
result += (blockSize - (result & (blockSize - 1)));
}
return result;
}
// reset the states to the pre-initialized values
private void reset() {
initialized = false;
bytesBuffered = 0;
padBufferLen = 0;
if (session != null) {
session = token.releaseSession(session);
}
}
// see JCE spec
protected byte[] engineUpdate(byte[] in, int inOfs, int inLen) {
try {
byte[] out = new byte[updateLength(inLen)];
int n = engineUpdate(in, inOfs, inLen, out, 0);
return P11Util.convert(out, 0, n);
} catch (ShortBufferException e) {
// convert since the output length is calculated by updateLength()
throw new ProviderException(e);
}
}
// see JCE spec
protected int engineUpdate(byte[] in, int inOfs, int inLen, byte[] out,
int outOfs) throws ShortBufferException {
int outLen = out.length - outOfs;
return implUpdate(in, inOfs, inLen, out, outOfs, outLen);
}
// see JCE spec
@Override
protected int engineUpdate(ByteBuffer inBuffer, ByteBuffer outBuffer)
throws ShortBufferException {
return implUpdate(inBuffer, outBuffer);
}
// see JCE spec
protected byte[] engineDoFinal(byte[] in, int inOfs, int inLen)
throws IllegalBlockSizeException, BadPaddingException {
try {
byte[] out = new byte[doFinalLength(inLen)];
int n = engineDoFinal(in, inOfs, inLen, out, 0);
return P11Util.convert(out, 0, n);
} catch (ShortBufferException e) {
// convert since the output length is calculated by doFinalLength()
throw new ProviderException(e);
}
}
// see JCE spec
protected int engineDoFinal(byte[] in, int inOfs, int inLen, byte[] out,
int outOfs) throws ShortBufferException, IllegalBlockSizeException,
BadPaddingException {
int n = 0;
if ((inLen != 0) && (in != null)) {
n = engineUpdate(in, inOfs, inLen, out, outOfs);
outOfs += n;
}
n += implDoFinal(out, outOfs, out.length - outOfs);
return n;
}
// see JCE spec
@Override
protected int engineDoFinal(ByteBuffer inBuffer, ByteBuffer outBuffer)
throws ShortBufferException, IllegalBlockSizeException,
BadPaddingException {
int n = engineUpdate(inBuffer, outBuffer);
n += implDoFinal(outBuffer);
return n;
}
private int implUpdate(byte[] in, int inOfs, int inLen,
byte[] out, int outOfs, int outLen) throws ShortBufferException {
if (outLen < updateLength(inLen)) {
throw new ShortBufferException();
}
try {
ensureInitialized();
int k = 0;
if (encrypt) {
k = token.p11.C_EncryptUpdate(session.id(), 0, in, inOfs, inLen,
0, out, outOfs, outLen);
} else {
int newPadBufferLen = 0;
if (paddingObj != null) {
if (padBufferLen != 0) {
// NSS throws up when called with data not in multiple
// of blocks. Try to work around this by holding the
// extra data in padBuffer.
if (padBufferLen != padBuffer.length) {
int bufCapacity = padBuffer.length - padBufferLen;
if (inLen > bufCapacity) {
bufferInputBytes(in, inOfs, bufCapacity);
inOfs += bufCapacity;
inLen -= bufCapacity;
} else {
bufferInputBytes(in, inOfs, inLen);
return 0;
}
}
k = token.p11.C_DecryptUpdate(session.id(),
0, padBuffer, 0, padBufferLen,
0, out, outOfs, outLen);
padBufferLen = 0;
}
newPadBufferLen = inLen & (blockSize - 1);
if (newPadBufferLen == 0) {
newPadBufferLen = padBuffer.length;
}
inLen -= newPadBufferLen;
}
if (inLen > 0) {
k += token.p11.C_DecryptUpdate(session.id(), 0, in, inOfs,
inLen, 0, out, (outOfs + k), (outLen - k));
}
// update 'padBuffer' if using our own padding impl.
if (paddingObj != null) {
bufferInputBytes(in, inOfs + inLen, newPadBufferLen);
}
}
bytesBuffered += (inLen - k);
return k;
} catch (PKCS11Exception e) {
if (e.getErrorCode() == CKR_BUFFER_TOO_SMALL) {
throw (ShortBufferException)
(new ShortBufferException().initCause(e));
}
reset();
throw new ProviderException("update() failed", e);
}
}
private int implUpdate(ByteBuffer inBuffer, ByteBuffer outBuffer)
throws ShortBufferException {
int inLen = inBuffer.remaining();
if (inLen <= 0) {
return 0;
}
int outLen = outBuffer.remaining();
if (outLen < updateLength(inLen)) {
throw new ShortBufferException();
}
int origPos = inBuffer.position();
try {
ensureInitialized();
long inAddr = 0;
int inOfs = 0;
byte[] inArray = null;
if (inBuffer instanceof DirectBuffer) {
inAddr = ((DirectBuffer) inBuffer).address();
inOfs = origPos;
} else if (inBuffer.hasArray()) {
inArray = inBuffer.array();
inOfs = (origPos + inBuffer.arrayOffset());
}
long outAddr = 0;
int outOfs = 0;
byte[] outArray = null;
if (outBuffer instanceof DirectBuffer) {
outAddr = ((DirectBuffer) outBuffer).address();
outOfs = outBuffer.position();
} else {
if (outBuffer.hasArray()) {
outArray = outBuffer.array();
outOfs = (outBuffer.position() + outBuffer.arrayOffset());
} else {
outArray = new byte[outLen];
}
}
int k = 0;
if (encrypt) {
if (inAddr == 0 && inArray == null) {
inArray = new byte[inLen];
inBuffer.get(inArray);
} else {
inBuffer.position(origPos + inLen);
}
k = token.p11.C_EncryptUpdate(session.id(),
inAddr, inArray, inOfs, inLen,
outAddr, outArray, outOfs, outLen);
} else {
int newPadBufferLen = 0;
if (paddingObj != null) {
if (padBufferLen != 0) {
// NSS throws up when called with data not in multiple
// of blocks. Try to work around this by holding the
// extra data in padBuffer.
if (padBufferLen != padBuffer.length) {
int bufCapacity = padBuffer.length - padBufferLen;
if (inLen > bufCapacity) {
bufferInputBytes(inBuffer, bufCapacity);
inOfs += bufCapacity;
inLen -= bufCapacity;
} else {
bufferInputBytes(inBuffer, inLen);
return 0;
}
}
k = token.p11.C_DecryptUpdate(session.id(), 0,
padBuffer, 0, padBufferLen, outAddr, outArray,
outOfs, outLen);
padBufferLen = 0;
}
newPadBufferLen = inLen & (blockSize - 1);
if (newPadBufferLen == 0) {
newPadBufferLen = padBuffer.length;
}
inLen -= newPadBufferLen;
}
if (inLen > 0) {
if (inAddr == 0 && inArray == null) {
inArray = new byte[inLen];
inBuffer.get(inArray);
} else {
inBuffer.position(inBuffer.position() + inLen);
}
k += token.p11.C_DecryptUpdate(session.id(), inAddr,
inArray, inOfs, inLen, outAddr, outArray,
(outOfs + k), (outLen - k));
}
// update 'padBuffer' if using our own padding impl.
if (paddingObj != null && newPadBufferLen != 0) {
bufferInputBytes(inBuffer, newPadBufferLen);
}
}
bytesBuffered += (inLen - k);
if (!(outBuffer instanceof DirectBuffer) &&
!outBuffer.hasArray()) {
outBuffer.put(outArray, outOfs, k);
} else {
outBuffer.position(outBuffer.position() + k);
}
return k;
} catch (PKCS11Exception e) {
// Reset input buffer to its original position for
inBuffer.position(origPos);
if (e.getErrorCode() == CKR_BUFFER_TOO_SMALL) {
throw (ShortBufferException)
(new ShortBufferException().initCause(e));
}
reset();
throw new ProviderException("update() failed", e);
}
}
private int implDoFinal(byte[] out, int outOfs, int outLen)
throws ShortBufferException, IllegalBlockSizeException,
BadPaddingException {
int requiredOutLen = doFinalLength(0);
if (outLen < requiredOutLen) {
throw new ShortBufferException();
}
try {
ensureInitialized();
int k = 0;
if (encrypt) {
if (paddingObj != null) {
int actualPadLen = paddingObj.setPaddingBytes(padBuffer,
requiredOutLen - bytesBuffered);
k = token.p11.C_EncryptUpdate(session.id(),
0, padBuffer, 0, actualPadLen,
0, out, outOfs, outLen);
}
k += token.p11.C_EncryptFinal(session.id(),
0, out, (outOfs + k), (outLen - k));
} else {
if (paddingObj != null) {
if (padBufferLen != 0) {
k = token.p11.C_DecryptUpdate(session.id(), 0,
padBuffer, 0, padBufferLen, 0, padBuffer, 0,
padBuffer.length);
}
k += token.p11.C_DecryptFinal(session.id(), 0, padBuffer, k,
padBuffer.length - k);
int actualPadLen = paddingObj.unpad(padBuffer, k);
k -= actualPadLen;
System.arraycopy(padBuffer, 0, out, outOfs, k);
} else {
k = token.p11.C_DecryptFinal(session.id(), 0, out, outOfs,
outLen);
}
}
return k;
} catch (PKCS11Exception e) {
handleException(e);
throw new ProviderException("doFinal() failed", e);
} finally {
reset();
}
}
private int implDoFinal(ByteBuffer outBuffer)
throws ShortBufferException, IllegalBlockSizeException,
BadPaddingException {
int outLen = outBuffer.remaining();
int requiredOutLen = doFinalLength(0);
if (outLen < requiredOutLen) {
throw new ShortBufferException();
}
try {
ensureInitialized();
long outAddr = 0;
byte[] outArray = null;
int outOfs = 0;
if (outBuffer instanceof DirectBuffer) {
outAddr = ((DirectBuffer) outBuffer).address();
outOfs = outBuffer.position();
} else {
if (outBuffer.hasArray()) {
outArray = outBuffer.array();
outOfs = outBuffer.position() + outBuffer.arrayOffset();
} else {
outArray = new byte[outLen];
}
}
int k = 0;
if (encrypt) {
if (paddingObj != null) {
int actualPadLen = paddingObj.setPaddingBytes(padBuffer,
requiredOutLen - bytesBuffered);
k = token.p11.C_EncryptUpdate(session.id(),
0, padBuffer, 0, actualPadLen,
outAddr, outArray, outOfs, outLen);
}
k += token.p11.C_EncryptFinal(session.id(),
outAddr, outArray, (outOfs + k), (outLen - k));
} else {
if (paddingObj != null) {
if (padBufferLen != 0) {
k = token.p11.C_DecryptUpdate(session.id(),
0, padBuffer, 0, padBufferLen,
0, padBuffer, 0, padBuffer.length);
padBufferLen = 0;
}
k += token.p11.C_DecryptFinal(session.id(),
0, padBuffer, k, padBuffer.length - k);
int actualPadLen = paddingObj.unpad(padBuffer, k);
k -= actualPadLen;
outArray = padBuffer;
outOfs = 0;
} else {
k = token.p11.C_DecryptFinal(session.id(),
outAddr, outArray, outOfs, outLen);
}
}
if ((!encrypt && paddingObj != null) ||
(!(outBuffer instanceof DirectBuffer) &&
!outBuffer.hasArray())) {
outBuffer.put(outArray, outOfs, k);
} else {
outBuffer.position(outBuffer.position() + k);
}
return k;
} catch (PKCS11Exception e) {
handleException(e);
throw new ProviderException("doFinal() failed", e);
} finally {
reset();
}
}
private void handleException(PKCS11Exception e)
throws ShortBufferException, IllegalBlockSizeException {
long errorCode = e.getErrorCode();
if (errorCode == CKR_BUFFER_TOO_SMALL) {
throw (ShortBufferException)
(new ShortBufferException().initCause(e));
} else if (errorCode == CKR_DATA_LEN_RANGE ||
errorCode == CKR_ENCRYPTED_DATA_LEN_RANGE) {
throw (IllegalBlockSizeException)
(new IllegalBlockSizeException(e.toString()).initCause(e));
}
}
// see JCE spec
protected byte[] engineWrap(Key key) throws IllegalBlockSizeException,
InvalidKeyException {
// XXX key wrapping
throw new UnsupportedOperationException("engineWrap()");
}
// see JCE spec
protected Key engineUnwrap(byte[] wrappedKey, String wrappedKeyAlgorithm,
int wrappedKeyType)
throws InvalidKeyException, NoSuchAlgorithmException {
// XXX key unwrapping
throw new UnsupportedOperationException("engineUnwrap()");
}
// see JCE spec
@Override
protected int engineGetKeySize(Key key) throws InvalidKeyException {
int n = P11SecretKeyFactory.convertKey
(token, key, keyAlgorithm).length();
return n;
}
private final void bufferInputBytes(byte[] in, int inOfs, int len) {
System.arraycopy(in, inOfs, padBuffer, padBufferLen, len);
padBufferLen += len;
bytesBuffered += len;
}
private final void bufferInputBytes(ByteBuffer inBuffer, int len) {
inBuffer.get(padBuffer, padBufferLen, len);
padBufferLen += len;
bytesBuffered += len;
}
}
Other Java examples (source code examples)Here is a short list of links related to this Java P11Cipher.java source code file: |
The search page
Other Java source code examples at this package level
Click here to learn more about this project
