public CMSTypedStream getContentStream(InputDecryptorProvider inputDecryptorProvider) throws CMSException { try { EncryptedContentInfo encContentInfo = encryptedData.getEncryptedContentInfo(); InputDecryptor decrytor = inputDecryptorProvider.get(encContentInfo.getContentEncryptionAlgorithm()); ByteArrayInputStream encIn = new ByteArrayInputStream(encContentInfo.getEncryptedContent().getOctets()); return new CMSTypedStream(encContentInfo.getContentType(), decrytor.getInputStream(encIn)); } catch (Exception e) { throw new CMSException("unable to create stream: " + e.getMessage(), e); } }
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(); }
public CMSAuthEnvelopedData(ContentInfo contentInfo) throws CMSException { this.contentInfo = contentInfo; AuthEnvelopedData authEnvData = AuthEnvelopedData.getInstance(contentInfo.getContent()); this.originator = authEnvData.getOriginatorInfo(); // // read the recipients // ASN1Set recipientInfos = authEnvData.getRecipientInfos(); // // read the auth-encrypted content info // EncryptedContentInfo authEncInfo = authEnvData.getAuthEncryptedContentInfo(); this.authEncAlg = authEncInfo.getContentEncryptionAlgorithm(); // final CMSProcessable processable = new CMSProcessableByteArray( // authEncInfo.getEncryptedContent().getOctets()); CMSSecureReadable secureReadable = new CMSSecureReadable() { public InputStream getInputStream() throws IOException, CMSException { return null; } }; // // build the RecipientInformationStore // this.recipientInfoStore = CMSEnvelopedHelper.buildRecipientInformationStore( recipientInfos, this.authEncAlg, secureReadable); // FIXME These need to be passed to the AEAD cipher as AAD (Additional Authenticated Data) this.authAttrs = authEnvData.getAuthAttrs(); this.mac = authEnvData.getMac().getOctets(); this.unauthAttrs = authEnvData.getUnauthAttrs(); }
