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 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));
}
}
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);
}
}