public KeyTransRecipientInfo(Asn1Sequence seq) { version = (DerInteger)seq[0]; rid = RecipientIdentifier.GetInstance(seq[1]); keyEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(seq[2]); encryptedKey = (Asn1OctetString)seq[3]; }
public KeyTransRecipientInfo( Asn1Sequence seq) { this.version = (DerInteger) seq[0]; this.rid = RecipientIdentifier.GetInstance(seq[1]); this.keyEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(seq[2]); this.encryptedKey = (Asn1OctetString) seq[3]; }
public KeyTransRecipientInfo(RecipientIdentifier rid, AlgorithmIdentifier keyEncryptionAlgorithm, Asn1OctetString encryptedKey) { if (rid.ToAsn1Object() is Asn1TaggedObject) { version = new DerInteger(2); } else { version = new DerInteger(0); } this.rid = rid; this.keyEncryptionAlgorithm = keyEncryptionAlgorithm; this.encryptedKey = encryptedKey; }
public KeyTransRecipientInfo( RecipientIdentifier rid, AlgorithmIdentifier keyEncryptionAlgorithm, Asn1OctetString encryptedKey) { if (rid.ToAsn1Object() is Asn1TaggedObject) { this.version = new DerInteger(2); } else { this.version = new DerInteger(0); } this.rid = rid; this.keyEncryptionAlgorithm = keyEncryptionAlgorithm; this.encryptedKey = encryptedKey; }
public RecipientInfo Generate(KeyParameter contentEncryptionKey, SecureRandom random) { byte[] keyBytes = contentEncryptionKey.GetKey(); AlgorithmIdentifier keyEncryptionAlgorithm = info.AlgorithmID; IWrapper keyWrapper = Helper.CreateWrapper(keyEncryptionAlgorithm.Algorithm.Id); keyWrapper.Init(true, new ParametersWithRandom(recipientPublicKey, random)); byte[] encryptedKeyBytes = keyWrapper.Wrap(keyBytes, 0, keyBytes.Length); RecipientIdentifier recipId; if (recipientTbsCert != null) { IssuerAndSerialNumber issuerAndSerial = new IssuerAndSerialNumber( recipientTbsCert.Issuer, recipientTbsCert.SerialNumber.Value); recipId = new RecipientIdentifier(issuerAndSerial); } else { recipId = new RecipientIdentifier(subjectKeyIdentifier); } return new RecipientInfo(new KeyTransRecipientInfo(recipId, keyEncryptionAlgorithm, new DerOctetString(encryptedKeyBytes))); }
private KeyTransRecipientInfo ComputeRecipientInfo(X509Certificate x509certificate, byte[] abyte0) { Asn1InputStream asn1inputstream = new Asn1InputStream(new MemoryStream(x509certificate.GetTbsCertificate())); TbsCertificateStructure tbscertificatestructure = TbsCertificateStructure.GetInstance(asn1inputstream.ReadObject()); AlgorithmIdentifier algorithmidentifier = tbscertificatestructure.SubjectPublicKeyInfo.AlgorithmID; Org.BouncyCastle.Asn1.Cms.IssuerAndSerialNumber issuerandserialnumber = new Org.BouncyCastle.Asn1.Cms.IssuerAndSerialNumber( tbscertificatestructure.Issuer, tbscertificatestructure.SerialNumber.Value); IBufferedCipher cipher = CipherUtilities.GetCipher(algorithmidentifier.ObjectID); cipher.Init(true, x509certificate.GetPublicKey()); byte[] outp = new byte[10000]; int len = cipher.DoFinal(abyte0, outp, 0); byte[] abyte1 = new byte[len]; System.Array.Copy(outp, 0, abyte1, 0, len); DerOctetString deroctetstring = new DerOctetString(abyte1); RecipientIdentifier recipId = new RecipientIdentifier(issuerandserialnumber); return new KeyTransRecipientInfo( recipId, algorithmidentifier, deroctetstring); }
internal RecipientInfo ToRecipientInfo( KeyParameter key, SecureRandom random) { byte[] keyBytes = key.GetKey(); if (pubKey != null) { IWrapper keyWrapper = Helper.CreateWrapper(keyEncAlg.ObjectID.Id); keyWrapper.Init(true, new ParametersWithRandom(pubKey, random)); Asn1OctetString encKey = new DerOctetString( keyWrapper.Wrap(keyBytes, 0, keyBytes.Length)); RecipientIdentifier recipId; if (cert != null) { TbsCertificateStructure tbs = TbsCertificateStructure.GetInstance( Asn1Object.FromByteArray(cert.GetTbsCertificate())); Asn1.Cms.IssuerAndSerialNumber encSid = new Asn1.Cms.IssuerAndSerialNumber( tbs.Issuer, tbs.SerialNumber.Value); recipId = new RecipientIdentifier(encSid); } else { recipId = new RecipientIdentifier(subKeyId); } return new RecipientInfo(new KeyTransRecipientInfo(recipId, keyEncAlg, encKey)); } else if (originator != null) { IWrapper keyWrapper = Helper.CreateWrapper( DerObjectIdentifier.GetInstance( Asn1Sequence.GetInstance(keyEncAlg.Parameters)[0]).Id); keyWrapper.Init(true, new ParametersWithRandom(secKey, random)); Asn1OctetString encKey = new DerOctetString( keyWrapper.Wrap(keyBytes, 0, keyBytes.Length)); RecipientEncryptedKey rKey = new RecipientEncryptedKey( new KeyAgreeRecipientIdentifier( new Asn1.Cms.IssuerAndSerialNumber( PrincipalUtilities.GetIssuerX509Principal(cert), cert.SerialNumber)), encKey); return new RecipientInfo( new KeyAgreeRecipientInfo(originator, ukm, keyEncAlg, new DerSequence(rKey))); } else if (derivationAlg != null) { string rfc3211WrapperName = Helper.GetRfc3211WrapperName(secKeyAlgorithm); IWrapper keyWrapper = Helper.CreateWrapper(rfc3211WrapperName); // Note: In Java build, the IV is automatically generated in JCE layer int ivLength = rfc3211WrapperName.StartsWith("DESEDE") ? 8 : 16; byte[] iv = new byte[ivLength]; random.NextBytes(iv); ICipherParameters parameters = new ParametersWithIV(secKey, iv); keyWrapper.Init(true, new ParametersWithRandom(parameters, random)); Asn1OctetString encKey = new DerOctetString( keyWrapper.Wrap(keyBytes, 0, keyBytes.Length)); // byte[] iv = keyWrapper.GetIV(); DerSequence seq = new DerSequence( new DerObjectIdentifier(secKeyAlgorithm), new DerOctetString(iv)); keyEncAlg = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdAlgPwriKek, seq); return new RecipientInfo(new PasswordRecipientInfo(derivationAlg, keyEncAlg, encKey)); } else { IWrapper keyWrapper = Helper.CreateWrapper(keyEncAlg.ObjectID.Id); keyWrapper.Init(true, new ParametersWithRandom(secKey, random)); Asn1OctetString encKey = new DerOctetString( keyWrapper.Wrap(keyBytes, 0, keyBytes.Length)); return new RecipientInfo(new KekRecipientInfo(secKeyId, keyEncAlg, encKey)); } }