private static void readRecipientInfo( List infos, RecipientInfo info, AlgorithmIdentifier messageAlgorithm, CMSSecureReadable secureReadable, AuthAttributesProvider additionalData) { ASN1Encodable recipInfo = info.getInfo(); if (recipInfo instanceof KeyTransRecipientInfo) { infos.add(new KeyTransRecipientInformation( (KeyTransRecipientInfo)recipInfo, messageAlgorithm, secureReadable, additionalData)); } else if (recipInfo instanceof KEKRecipientInfo) { infos.add(new KEKRecipientInformation( (KEKRecipientInfo)recipInfo, messageAlgorithm, secureReadable, additionalData)); } else if (recipInfo instanceof KeyAgreeRecipientInfo) { KeyAgreeRecipientInformation.readRecipientInfo(infos, (KeyAgreeRecipientInfo)recipInfo, messageAlgorithm, secureReadable, additionalData); } else if (recipInfo instanceof PasswordRecipientInfo) { infos.add(new PasswordRecipientInformation( (PasswordRecipientInfo)recipInfo, messageAlgorithm, secureReadable, additionalData)); } }
KeyTransRecipientInformation( KeyTransRecipientInfo info, AlgorithmIdentifier messageAlgorithm, CMSSecureReadable secureReadable, AuthAttributesProvider additionalData) { super(info.getKeyEncryptionAlgorithm(), messageAlgorithm, secureReadable, additionalData); this.info = info; RecipientIdentifier r = info.getRecipientIdentifier(); if (r.isTagged()) { ASN1OctetString octs = ASN1OctetString.getInstance(r.getId()); rid = new KeyTransRecipientId(octs.getOctets()); } else { IssuerAndSerialNumber iAnds = IssuerAndSerialNumber.getInstance(r.getId()); rid = new KeyTransRecipientId(iAnds.getName(), iAnds.getSerialNumber().getValue()); } }
private KeyTransRecipientInfo computeRecipientInfo(X509Certificate x509certificate, byte[] abyte0) throws GeneralSecurityException, IOException { ASN1InputStream asn1inputstream = new ASN1InputStream(new ByteArrayInputStream(x509certificate.getTBSCertificate())); TBSCertificateStructure tbscertificatestructure = TBSCertificateStructure.getInstance(asn1inputstream.readObject()); AlgorithmIdentifier algorithmidentifier = tbscertificatestructure.getSubjectPublicKeyInfo().getAlgorithm(); IssuerAndSerialNumber issuerandserialnumber = new IssuerAndSerialNumber( tbscertificatestructure.getIssuer(), tbscertificatestructure.getSerialNumber().getValue()); Cipher cipher = Cipher.getInstance(algorithmidentifier.getAlgorithm().getId()); cipher.init(1, x509certificate); DEROctetString deroctetstring = new DEROctetString(cipher.doFinal(abyte0)); RecipientIdentifier recipId = new RecipientIdentifier(issuerandserialnumber); return new KeyTransRecipientInfo( recipId, algorithmidentifier, deroctetstring); }
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(); }
