Examples with PasswordRecipientInfo com.github.zhenwei.pkix.util.asn1.cms.PasswordRecipientInfo used on opensource projects

Example 1 with PasswordRecipientInfo

use of com.github.zhenwei.pkix.util.asn1.cms.PasswordRecipientInfo in project LinLong-Java by zhenwei1108.

the class PasswordRecipientInfoGenerator method generate.

public RecipientInfo generate(GenericKey contentEncryptionKey) throws CMSException {
    // / TODO: set IV size properly!
    byte[] iv = new byte[blockSize];
    if (random == null) {
        random = new SecureRandom();
    }
    random.nextBytes(iv);
    if (salt == null) {
        salt = new byte[20];
        random.nextBytes(salt);
    }
    keyDerivationAlgorithm = new AlgorithmIdentifier(PKCSObjectIdentifiers.id_PBKDF2, new PBKDF2Params(salt, iterationCount, prf.prfAlgID));
    byte[] derivedKey = calculateDerivedKey(schemeID, keyDerivationAlgorithm, keySize);
    AlgorithmIdentifier kekAlgorithmId = new AlgorithmIdentifier(kekAlgorithm, new DEROctetString(iv));
    byte[] encryptedKeyBytes = generateEncryptedBytes(kekAlgorithmId, derivedKey, contentEncryptionKey);
    ASN1OctetString encryptedKey = new DEROctetString(encryptedKeyBytes);
    ASN1EncodableVector v = new ASN1EncodableVector();
    v.add(kekAlgorithm);
    v.add(new DEROctetString(iv));
    AlgorithmIdentifier keyEncryptionAlgorithm = new AlgorithmIdentifier(PKCSObjectIdentifiers.id_alg_PWRI_KEK, new DERSequence(v));
    return new RecipientInfo(new PasswordRecipientInfo(keyDerivationAlgorithm, keyEncryptionAlgorithm, encryptedKey));
}