protected Key extractSecretKey(
AlgorithmIdentifier keyEncryptionAlgorithm,
AlgorithmIdentifier encryptedKeyAlgorithm,
byte[] encryptedEncryptionKey)
throws CMSException {
AsymmetricKeyUnwrapper unwrapper =
helper.createAsymmetricUnwrapper(keyEncryptionAlgorithm, recipientKey);
try {
return CMSUtils.getJceKey(
unwrapper.generateUnwrappedKey(encryptedKeyAlgorithm, encryptedEncryptionKey));
} catch (OperatorException e) {
throw new CMSException("exception unwrapping key: " + e.getMessage(), e);
}
}
