private void implInit(int opmode, Key key) throws InvalidKeyException {
cancelOperation();
p11Key = P11KeyFactory.convertKey(token, key, algorithm);
boolean encrypt;
if (opmode == Cipher.ENCRYPT_MODE) {
encrypt = true;
} else if (opmode == Cipher.DECRYPT_MODE) {
encrypt = false;
} else if (opmode == Cipher.WRAP_MODE) {
if (p11Key.isPublic() == false) {
throw new InvalidKeyException("Wrap has to be used with public keys");
}
// No further setup needed for C_Wrap(). We'll initialize later if
// we can't use C_Wrap().
return;
} else if (opmode == Cipher.UNWRAP_MODE) {
if (p11Key.isPrivate() == false) {
throw new InvalidKeyException("Unwrap has to be used with private keys");
}
// No further setup needed for C_Unwrap(). We'll initialize later
// if we can't use C_Unwrap().
return;
} else {
throw new InvalidKeyException("Unsupported mode: " + opmode);
}
if (p11Key.isPublic()) {
mode = encrypt ? MODE_ENCRYPT : MODE_VERIFY;
} else if (p11Key.isPrivate()) {
mode = encrypt ? MODE_SIGN : MODE_DECRYPT;
} else {
throw new InvalidKeyException("Unknown key type: " + p11Key);
}
int n = (p11Key.length() + 7) >> 3;
outputSize = n;
buffer = new byte[n];
maxInputSize = ((padType == PAD_PKCS1 && encrypt) ? (n - PKCS1_MIN_PADDING_LENGTH) : n);
try {
initialize();
} catch (PKCS11Exception e) {
throw new InvalidKeyException("init() failed", e);
}
}
// see JCE spec
protected int engineGetKeySize(Key key) throws InvalidKeyException {
int n = P11KeyFactory.convertKey(token, key, algorithm).length();
return n;
}