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

Example 6 with RecipientInfo

use of com.github.zhenwei.pkix.util.asn1.cms.RecipientInfo 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));
}

Example 7 with RecipientInfo

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

the class CMSEnvelopedHelper method buildRecipientInformationStore.

static RecipientInformationStore buildRecipientInformationStore(ASN1Set recipientInfos, AlgorithmIdentifier messageAlgorithm, CMSSecureReadable secureReadable, AuthAttributesProvider additionalData) {
    List infos = new ArrayList();
    for (int i = 0; i != recipientInfos.size(); i++) {
        RecipientInfo info = RecipientInfo.getInstance(recipientInfos.getObjectAt(i));
        readRecipientInfo(infos, info, messageAlgorithm, secureReadable, additionalData);
    }
    return new RecipientInformationStore(infos);
}

Example 8 with RecipientInfo

use of com.github.zhenwei.pkix.util.asn1.cms.RecipientInfo in project itext2 by albfernandez.

the class PdfPublicKeySecurityHandler method createDERForRecipient.

private ASN1Primitive createDERForRecipient(byte[] in, X509Certificate cert) throws IOException, GeneralSecurityException {
    String s = "1.2.840.113549.3.2";
    AlgorithmParameterGenerator algorithmparametergenerator = AlgorithmParameterGenerator.getInstance(s);
    AlgorithmParameters algorithmparameters = algorithmparametergenerator.generateParameters();
    ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(algorithmparameters.getEncoded("ASN.1"));
    ASN1InputStream asn1inputstream = new ASN1InputStream(bytearrayinputstream);
    ASN1Primitive derobject = asn1inputstream.readObject();
    KeyGenerator keygenerator = KeyGenerator.getInstance(s);
    keygenerator.init(128);
    SecretKey secretkey = keygenerator.generateKey();
    Cipher cipher = Cipher.getInstance(s);
    cipher.init(1, secretkey, algorithmparameters);
    byte[] abyte1 = cipher.doFinal(in);
    DEROctetString deroctetstring = new DEROctetString(abyte1);
    KeyTransRecipientInfo keytransrecipientinfo = computeRecipientInfo(cert, secretkey.getEncoded());
    DERSet derset = new DERSet(new RecipientInfo(keytransrecipientinfo));
    AlgorithmIdentifier algorithmidentifier = new AlgorithmIdentifier(new ASN1ObjectIdentifier(s), derobject);
    EncryptedContentInfo encryptedcontentinfo = new EncryptedContentInfo(PKCSObjectIdentifiers.data, algorithmidentifier, deroctetstring);
    EnvelopedData env = new EnvelopedData(null, derset, encryptedcontentinfo, (org.bouncycastle.asn1.ASN1Set) null);
    ContentInfo contentinfo = new ContentInfo(PKCSObjectIdentifiers.envelopedData, env);
    return contentinfo.toASN1Primitive();
}