public static PrivateKeyInfo createPrivateKeyInfo(
char[] passPhrase,
EncryptedPrivateKeyInfo encInfo)
{
CipherParameters keyParameters = PBEUtil.generateCipherParameters(encInfo.getEncryptionAlgorithm().getObjectId(), passPhrase, encInfo.getEncryptionAlgorithm().getParameters());
Object engine = PBEUtil.createEngine(encInfo.getEncryptionAlgorithm().getObjectId());
byte[] encoding = null;
if (engine is BufferedBlockCipher)
{
BufferedBlockCipher cipher = (BufferedBlockCipher)engine;
cipher.init(false, keyParameters);
byte[] keyBytes = encInfo.getEncryptedData();
int encLen = cipher.getOutputSize(keyBytes.Length);
encoding = new byte[encLen];
int off = cipher.processBytes(keyBytes, 0, keyBytes.Length, encoding, 0);
cipher.doFinal(encoding, off);
}
else if (engine is StreamCipher)
{
StreamCipher cipher = (StreamCipher)engine;
cipher.init(false, keyParameters);
byte[] keyBytes = encInfo.getEncryptedData();
encoding = new byte[keyBytes.Length];
cipher.processBytes(keyBytes, 0, keyBytes.Length, encoding, 0);
}
ASN1InputStream aIn = new ASN1InputStream(new MemoryStream(encoding));
return(PrivateKeyInfo.getInstance(aIn.readObject()));
}
