/// <summary>
/// Parses a single packet out of the given binary
/// data. Even if there are more than one packets in the byte
/// array, only the first packet is returned.
/// </summary>
/// <param name="bBinaryData">A byte array containing a set
/// of OpenPGP packets</param>
/// <returns>Returns an single OpenPGP packets</returns>
/// <remarks>No remarks</remarks>
public virtual Packet ParsePacket(byte[] bBinaryData)
{
Packet pReturnPacket = new Packet();
if ((bBinaryData[0] & 0xC0) == 0xC0)
{
pfFormat = PacketFormats.New;
}
else if ((bBinaryData[0] & 0xC0) == 0x80)
{
pfFormat = PacketFormats.Old;
}
else
{
throw(new ArgumentException("This is not a valid OpenPGP Packet"));
}
if (pfFormat == PacketFormats.New)
{
int iBinaryDataPos = 1;
ctContent = (ContentTypes)(bBinaryData[0] & 0x3F);
lLength = bBinaryData[1];
bBody = new byte[0];
int iHeaderLength = 1;
//partial body lengths
while ((lLength > 223) && (lLength < 255))
{
iBinaryDataPos += 1;
iHeaderLength++;
int lPartialBody = 1 << ((int)(lLength & 0x1F));
int lOldLength = 0;
if (bBody.Length > 0)
{
byte[] bOldBody = new byte[bBody.Length];
bBody.CopyTo(bOldBody, 0);
bBody = new byte[bOldBody.Length + lPartialBody];
bOldBody.CopyTo(bBody, 0);
lOldLength = bBody.Length;
}
else
{
bBody = new byte[lPartialBody];
}
Array.Copy(bBinaryData, iBinaryDataPos, bBody, bBody.Length - lPartialBody, lPartialBody);
lLength = bBinaryData[iBinaryDataPos + lPartialBody];
iBinaryDataPos += lPartialBody;
} //partial bodies must end with a normal header!
if (lLength < 192)
{
iHeaderLength++;
bHeader = new byte[iHeaderLength];
if (bBody.Length == 0)
{
Array.Copy(bBinaryData, 0, bHeader, 0, 2);
iBinaryDataPos = 1;
}
byte[] bOldBody = new byte[bBody.Length];
bBody.CopyTo(bOldBody, 0);
bBody = new byte[bOldBody.Length + lLength];
bOldBody.CopyTo(bBody, 0);
Array.Copy(bBinaryData, iBinaryDataPos + 1, bBody, bBody.Length - (int)lLength, (int)lLength);
}
else if ((lLength > 191) && (lLength < 224))
{
iHeaderLength += 2;
bHeader = new byte[iHeaderLength];
if (bBody.Length == 0)
{
Array.Copy(bBinaryData, 0, bHeader, 0, 3);
iBinaryDataPos = 1;
}
lLength = ((bBinaryData[iBinaryDataPos++] - 192) << 8) + bBinaryData[iBinaryDataPos++] + 192;
byte[] bOldBody = new byte[bBody.Length];
bBody.CopyTo(bOldBody, 0);
bBody = new byte[bOldBody.Length + lLength];
bOldBody.CopyTo(bBody, 0);
Array.Copy(bBinaryData, iBinaryDataPos, bBody, bBody.Length - (int)lLength, (int)lLength);
}
else if (lLength == 255)
{
iHeaderLength += 5;
bHeader = new byte[iHeaderLength];
if (bBody.Length == 0)
{
Array.Copy(bBinaryData, 0, bHeader, 0, 6);
iBinaryDataPos = 1;
}
lLength = (bBinaryData[iBinaryDataPos++] << 24) ^ (bBinaryData[iBinaryDataPos++] << 16) ^
(bBinaryData[iBinaryDataPos++] << 8) ^ bBinaryData[iBinaryDataPos++];
byte[] bOldBody = new byte[bBody.Length];
bBody.CopyTo(bOldBody, 0);
bBody = new byte[bOldBody.Length + lLength];
bOldBody.CopyTo(bBody, 0);
Array.Copy(bBinaryData, iBinaryDataPos, bBody, bBody.Length - (int)lLength, (int)lLength);
}
}
else
{
ctContent = (ContentTypes)((bBinaryData[0] & 0x3C) >> 2);
switch (bBinaryData[0] & 0x03)
{
case 0:
lLength = bBinaryData[1];
bHeader = new byte[2];
break;
case 1:
lLength = (bBinaryData[1] << 8) ^ (bBinaryData[2]);
bHeader = new byte[3];
break;
case 2:
lLength = (bBinaryData[1] << 16) ^ (bBinaryData[2] << 8) ^
(bBinaryData[3]);
bHeader = new byte[4];
break;
case 3:
throw new System.NotSupportedException("Packets of indetermined length are not supported due to security considerations!");
default:
throw new System.ApplicationException("This is not a valid Packet!");
}
bBody = new byte[lLength];
Array.Copy(bBinaryData, 0, bHeader, 0, bHeader.Length);
Array.Copy(bBinaryData, bHeader.Length, bBody, 0, (int)lLength);
}
this.bIsUpdated = false;
switch (ctContent)
{
case ContentTypes.AsymSessionKey:
pReturnPacket = new AsymSessionKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.Compressed:
pReturnPacket = new CompressedDataPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.LiteralData:
pReturnPacket = new LiteralDataPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.Marker:
pReturnPacket = new Packet(this);
//We can savly ignore Marker packets!
//MessageBox.Show("This is a marker packet. It is not yet supported.");
break;
case ContentTypes.OnePassSignature:
pReturnPacket = new OnePassSignaturePacket(this);
//System.Windows.Forms.MessageBox.Show("This is a One Pass Signature Packet. It is not yet supported");
break;
//Content is Public Key Packet
case ContentTypes.PublicKey:
pReturnPacket = new PublicKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
//Content is Public Subkey Packet. Same format as Public Key Packet
case ContentTypes.PublicSubkey:
pReturnPacket = new PublicKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.SecretKey:
pReturnPacket = new SecretKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.SecretSubkey:
pReturnPacket = new SecretKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.Signature:
pReturnPacket = new SignaturePacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.SymEncrypted:
pReturnPacket = new SymmetricallyEncryptedDataPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.SymSessionKey:
pReturnPacket = new SymSessionKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.Trust:
pReturnPacket = new Packet(this);
//throw new Exception("This is a Trust Packet. It is not yet supported");
break;
case ContentTypes.UserID:
pReturnPacket = new UserIDPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
default:
pReturnPacket = new Packet(this);
//throw new Exception("Sorry, but this is a packet I don't know about!");
break;
}
pReturnPacket.bIsUpdated = false;
return(pReturnPacket);
}
/// <summary>
/// Generate a key pair
/// </summary>
/// <param name="iKeySize">Encription key size</param>
/// <param name="strPassphrase">passhrase for the key pair</param>
/// <param name="userID">primary user id</param>
/// <param name="email">user email</param>
/// <param name="notation">xml encoded user info</param>
/// <param name="expirationTime">expiration date of the primary key (new DateTime(0) == never)</param>
/// <param name="keyType">1: RSA/DSA 0:Elgamal/DSA(DEFAULT)</param>
/// <param name="isRevocableKey">revocable?</param>
/// <param name="isRevocableSubkey">revocable subkey?</param>
public void GenerateKey(int iKeySize, string strPassphrase, string userID, string email, string notation, DateTime expirationTime, int keyType, bool isRevocableKey, bool isRevocableSubkey)
{
if(iKeySize % 1024 != 0)
throw new Exception("Keysize must be a 1024 multiple");
System.Security.Cryptography.RandomNumberGenerator rngRand;
// let's first create the encryption key
BigInteger[][] biEncryptionKey;
if (keyType == 1) {
// it's a RSA/DSA key
biEncryptionKey = GenerateRSAEncryptionKey(iKeySize);
} else {
// it's an elgamal/DSA key DEFAULF
biEncryptionKey = GenerateElGamalEncryptionKey(iKeySize);
}
// now the signature key
BigInteger[][] biSignatureKey = GenerateDSASignatureKey();
PublicKeyPacket pkpSignatureKey = new PublicKeyPacket(false);
pkpSignatureKey.Algorithm = AsymAlgorithms.DSA;
pkpSignatureKey.KeyMaterial = biSignatureKey[0];
pkpSignatureKey.TimeCreated = DateTime.Now;
pkpSignatureKey.Version = PublicKeyPacketVersionNumbers.v4;
SecretKeyPacket skpSignatureKey = new SecretKeyPacket(false);
skpSignatureKey.SymmetricalAlgorithm = SymAlgorithms.AES256;
skpSignatureKey.PublicKey = pkpSignatureKey;
skpSignatureKey.InitialVector = new byte[CipherHelper.CipherBlockSize(SymAlgorithms.AES256)];
rngRand = System.Security.Cryptography.RandomNumberGenerator.Create();
rngRand.GetBytes(skpSignatureKey.InitialVector);
skpSignatureKey.EncryptKeyMaterial(biSignatureKey[1], strPassphrase);
skpSignatureKey.PublicKey = pkpSignatureKey;
PublicKeyPacket pkpEncryptionKey = new PublicKeyPacket(true);
if (keyType == 0) {
// it's an elgamal/DSA key
pkpEncryptionKey.Algorithm = AsymAlgorithms.ElGamal_Encrypt_Only;
} else if (keyType == 1) {
// it's a RSA/DSA key
pkpEncryptionKey.Algorithm = AsymAlgorithms.RSA_Encrypt_Only;
}
pkpEncryptionKey.KeyMaterial = biEncryptionKey[0];
pkpEncryptionKey.TimeCreated = DateTime.Now;
pkpEncryptionKey.Version = PublicKeyPacketVersionNumbers.v4;
SecretKeyPacket skpEncryptionKey = new SecretKeyPacket(true);
skpEncryptionKey.SymmetricalAlgorithm = SymAlgorithms.AES256;
skpEncryptionKey.PublicKey = pkpEncryptionKey;
skpEncryptionKey.InitialVector = new byte[CipherHelper.CipherBlockSize(SymAlgorithms.AES256)];
rngRand = System.Security.Cryptography.RandomNumberGenerator.Create();
rngRand.GetBytes(skpEncryptionKey.InitialVector);
skpEncryptionKey.EncryptKeyMaterial(biEncryptionKey[1], strPassphrase);
skpEncryptionKey.PublicKey = pkpEncryptionKey;
CertifiedUserID cuiUID = new CertifiedUserID();
UserIDPacket uipUID = new UserIDPacket();
uipUID.UserID = userID.Trim() + " <" + email.Trim() + ">";
cuiUID.UserID = uipUID;
SignaturePacket spSelfSig = new SignaturePacket();
if (notation != null) {
SignatureSubPacket sspNotation = new SignatureSubPacket();
sspNotation.Type = SignatureSubPacketTypes.NotationData;
sspNotation.NotationName = "PersonalData";
sspNotation.NotationValue = notation;
spSelfSig.AddSubPacket(sspNotation,false);
}
if (expirationTime.Ticks != 0) {
SignatureSubPacket sspExpiration = new SignatureSubPacket();
sspExpiration.Type = SignatureSubPacketTypes.KeyExpirationTime;
sspExpiration.KeyExpirationTime = new DateTime(expirationTime.Ticks + (new DateTime(1970,1,2)).Ticks - pkpEncryptionKey.TimeCreated.Ticks);
spSelfSig.AddSubPacket(sspExpiration, true);
}
if (!isRevocableKey) {
SignatureSubPacket sspRevocable = new SignatureSubPacket();
sspRevocable.Type = SignatureSubPacketTypes.Revocable;
sspRevocable.Revocable = isRevocableKey;
spSelfSig.AddSubPacket(sspRevocable, true);
}
SignatureSubPacket sspPrimaryUID = new SignatureSubPacket();
sspPrimaryUID.Type = SignatureSubPacketTypes.PrimaryUserID;
sspPrimaryUID.Revocable = true;
spSelfSig.AddSubPacket(sspPrimaryUID, true);
spSelfSig.Version = SignaturePacketVersionNumbers.v4;
spSelfSig.HashAlgorithm = HashAlgorithms.SHA1;
spSelfSig.KeyID = pkpSignatureKey.KeyID;
spSelfSig.TimeCreated = DateTime.Now;
SignatureSubPacket sspPrimaryUserID = new SignatureSubPacket();
sspPrimaryUserID.Type = SignatureSubPacketTypes.PrimaryUserID;
sspPrimaryUserID.PrimaryUserID = true;
spSelfSig.AddSubPacket(sspPrimaryUserID, true);
SignatureSubPacket sspPreferedSymAlgos = new SignatureSubPacket();
sspPreferedSymAlgos.Type = SignatureSubPacketTypes.PreferedSymmetricAlgorithms;
sspPreferedSymAlgos.PreferedSymAlgos = new SymAlgorithms[] {SymAlgorithms.AES256, SymAlgorithms.AES192, SymAlgorithms.AES256, SymAlgorithms.CAST5, SymAlgorithms.Triple_DES};
spSelfSig.AddSubPacket(sspPreferedSymAlgos, true);
SignatureSubPacket sspPreferedHashAlgos = new SignatureSubPacket();
sspPreferedHashAlgos.Type = SignatureSubPacketTypes.PreferedHashAlgorithms;
sspPreferedHashAlgos.PreferedHashAlgos = new HashAlgorithms[] {HashAlgorithms.SHA1};
spSelfSig.AddSubPacket(sspPreferedHashAlgos, true);
cuiUID.Certificates = new System.Collections.ArrayList();
cuiUID.Sign(spSelfSig, skpSignatureKey, strPassphrase, pkpSignatureKey);
CertifiedPublicSubkey cpsEncryptionKey = new CertifiedPublicSubkey();
cpsEncryptionKey.Subkey = pkpEncryptionKey;
cpsEncryptionKey.SignKeyBindingSignature(pkpSignatureKey, skpSignatureKey, strPassphrase, expirationTime, isRevocableSubkey);
TransportablePublicKey tpkPublicKey = new TransportablePublicKey();
tpkPublicKey.PrimaryKey = pkpSignatureKey;
tpkPublicKey.SubKeys.Add(cpsEncryptionKey);
tpkPublicKey.Certifications.Add(cuiUID);
this.PublicRing.AddPublicKey(tpkPublicKey);
TransportableSecretKey tskSecretKey = new TransportableSecretKey();
tskSecretKey.PrimaryKey = skpSignatureKey;
tskSecretKey.SubKeys.Add(skpEncryptionKey);
tskSecretKey.UserIDs.Add(uipUID);
this.SecretRing.AddSecretKey(tskSecretKey);
}
/// <summary>
/// Adds a userID to the specified key
/// </summary>
/// <param name="userID">user id to be added</param>
/// <param name="email">user email address</param>
/// <param name="infos">xml encoded user infos</param>
/// <param name="strPassphrase">passphrase of the secret key we want to add the user id to</param>
/// <param name="KeyID">keyID of the key we want to add the userID to</param>
/// <param name="isRevocable">is a revocable keyID</param>
public void AddUserID(string userID, string email, string infos, string strPassphrase, ulong KeyID, bool isRevocable)
{
TransportablePublicKey tpkKey = this.PublicRing.Find(KeyID,false);
TransportableSecretKey tskKey = this.SecretRing.Find(KeyID);
if (tpkKey != null && tskKey != null) {
CertifiedUserID cuiUID = new CertifiedUserID();
UserIDPacket uipUID = new UserIDPacket();
uipUID.UserID = userID.Trim() + " <" + email.Trim() + ">";
cuiUID.UserID = uipUID;
SecretKeyPacket skpSignatureKey = tskKey.FindKey(AsymActions.Sign);
SignaturePacket spSelfSig = new SignaturePacket();
if (infos != null) {
SignatureSubPacket sspNotation = new SignatureSubPacket();
sspNotation.Type = SignatureSubPacketTypes.NotationData;
sspNotation.NotationName = "PersonalData";
sspNotation.NotationValue = infos;
spSelfSig.AddSubPacket(sspNotation,false);
}
if (!isRevocable) {
SignatureSubPacket sspRevocable = new SignatureSubPacket();
sspRevocable.Type = SignatureSubPacketTypes.Revocable;
sspRevocable.Revocable = isRevocable;
spSelfSig.AddSubPacket(sspRevocable, true);
}
SignatureSubPacket sspPrimaryUID = new SignatureSubPacket();
sspPrimaryUID.Type = SignatureSubPacketTypes.PrimaryUserID;
sspPrimaryUID.Revocable = false;
spSelfSig.AddSubPacket(sspPrimaryUID, true);
spSelfSig.Version = SignaturePacketVersionNumbers.v4;
spSelfSig.HashAlgorithm = HashAlgorithms.SHA1;
spSelfSig.KeyID = skpSignatureKey.PublicKey.KeyID;
spSelfSig.TimeCreated = DateTime.Now;
cuiUID.Certificates = new System.Collections.ArrayList();
cuiUID.Sign(spSelfSig, skpSignatureKey, strPassphrase, tpkKey.PrimaryKey);
tpkKey.Certifications.Add(cuiUID);
tskKey.UserIDs.Add(uipUID);
return;
}
throw new Exception("Keys not found");
}
public void AddUserID(ulong lKeyID, string strName, string strEmail, string strPassphrase)
{
TransportableSecretKey tskKey = skrKeyRing.Find(lKeyID);
TransportablePublicKey tpkKey = pkrKeyRing.Find(lKeyID, false);
CertifiedUserID cuiUID = new CertifiedUserID();
UserIDPacket uipUID = new UserIDPacket();
uipUID.UserID = strName.Trim() + " <" + strEmail.Trim() + ">";
cuiUID.UserID = uipUID;
SecretKeyPacket skpSignatureKey = tskKey.FindKey(AsymActions.Sign);
SignaturePacket spSelfSig = new SignaturePacket();
spSelfSig.Version = SignaturePacketVersionNumbers.v4;
spSelfSig.HashAlgorithm = HashAlgorithms.SHA1;
spSelfSig.KeyID = skpSignatureKey.PublicKey.KeyID;
spSelfSig.TimeCreated = DateTime.Now;
cuiUID.Certificates = new System.Collections.ArrayList();
cuiUID.Sign(spSelfSig, skpSignatureKey, strPassphrase, tpkKey.PrimaryKey);
tpkKey.Certifications.Add(cuiUID);
tskKey.UserIDs.Add(uipUID);
}
public void GenerateKey(string strName, string strEmail, string strKeyType, int iKeySize, long lExpiration, string strPassphrase)
{
if (strKeyType == "ElGamal/DSA") {
System.Security.Cryptography.RandomNumberGenerator rngRand = System.Security.Cryptography.RandomNumberGenerator.Create();
// let's first create the encryption key
BigInteger[][] biEncryptionKey = GenerateEncryptionKey(iKeySize);
// now the signature key
BigInteger[][] biSignatureKey = GenerateSignatureKey();
PublicKeyPacket pkpSignatureKey = new PublicKeyPacket(false);
pkpSignatureKey.Algorithm = AsymAlgorithms.DSA;
pkpSignatureKey.KeyMaterial = biSignatureKey[0];
pkpSignatureKey.TimeCreated = DateTime.Now;
pkpSignatureKey.Version = PublicKeyPacketVersionNumbers.v4;
SecretKeyPacket skpSignatureKey = new SecretKeyPacket(false);
skpSignatureKey.SymmetricalAlgorithm = SymAlgorithms.AES256;
skpSignatureKey.PublicKey = pkpSignatureKey;
skpSignatureKey.InitialVector = new byte[CipherHelper.CipherBlockSize(SymAlgorithms.AES256)];
rngRand.GetBytes(skpSignatureKey.InitialVector);
skpSignatureKey.EncryptKeyMaterial(biSignatureKey[1], strPassphrase);
skpSignatureKey.PublicKey = pkpSignatureKey;
PublicKeyPacket pkpEncryptionKey = new PublicKeyPacket(true);
pkpEncryptionKey.Algorithm = AsymAlgorithms.ElGamal_Encrypt_Only;
pkpEncryptionKey.KeyMaterial = biEncryptionKey[0];
pkpEncryptionKey.TimeCreated = DateTime.Now;
pkpEncryptionKey.Version = PublicKeyPacketVersionNumbers.v4;
SecretKeyPacket skpEncryptionKey = new SecretKeyPacket(true);
skpEncryptionKey.SymmetricalAlgorithm = SymAlgorithms.AES256;
skpEncryptionKey.PublicKey = pkpEncryptionKey;
skpEncryptionKey.InitialVector = new byte[CipherHelper.CipherBlockSize(SymAlgorithms.AES256)];
rngRand.GetBytes(skpEncryptionKey.InitialVector);
skpEncryptionKey.EncryptKeyMaterial(biEncryptionKey[1], strPassphrase);
skpEncryptionKey.PublicKey = pkpEncryptionKey;
CertifiedUserID cuiUID = new CertifiedUserID();
UserIDPacket uipUID = new UserIDPacket();
uipUID.UserID = strName.Trim() + " <" + strEmail.Trim() + ">";
cuiUID.UserID = uipUID;
SignaturePacket spSelfSig = new SignaturePacket();
spSelfSig.Version = SignaturePacketVersionNumbers.v4;
spSelfSig.HashAlgorithm = HashAlgorithms.SHA1;
spSelfSig.KeyID = pkpSignatureKey.KeyID;
spSelfSig.TimeCreated = DateTime.Now;
SignatureSubPacket sspPrimaryUserID = new SignatureSubPacket();
sspPrimaryUserID.Type = SignatureSubPacketTypes.PrimaryUserID;
sspPrimaryUserID.PrimaryUserID = true;
spSelfSig.AddSubPacket(sspPrimaryUserID, true);
SignatureSubPacket sspPreferedSymAlgos = new SignatureSubPacket();
sspPreferedSymAlgos.Type = SignatureSubPacketTypes.PreferedSymmetricAlgorithms;
sspPreferedSymAlgos.PreferedSymAlgos = new SymAlgorithms[] {SymAlgorithms.AES256, SymAlgorithms.AES192, SymAlgorithms.AES256, SymAlgorithms.CAST5, SymAlgorithms.Triple_DES};
spSelfSig.AddSubPacket(sspPreferedSymAlgos, true);
SignatureSubPacket sspPreferedHashAlgos = new SignatureSubPacket();
sspPreferedHashAlgos.Type = SignatureSubPacketTypes.PreferedHashAlgorithms;
sspPreferedHashAlgos.PreferedHashAlgos = new HashAlgorithms[] {HashAlgorithms.SHA1};
spSelfSig.AddSubPacket(sspPreferedHashAlgos, true);
if (lExpiration != 0) {
SignatureSubPacket sspExpiration = new SignatureSubPacket();
sspExpiration.Type = SignatureSubPacketTypes.SignatureExpirationTime;
sspExpiration.SignatureExpirationTime = new DateTime(lExpiration);
spSelfSig.AddSubPacket(sspExpiration, true);
}
cuiUID.Certificates = new System.Collections.ArrayList();
cuiUID.Sign(spSelfSig, skpSignatureKey, strPassphrase, pkpSignatureKey);
CertifiedPublicSubkey cpsEncryptionKey = new CertifiedPublicSubkey();
cpsEncryptionKey.Subkey = pkpEncryptionKey;
cpsEncryptionKey.SignKeyBindingSignature(pkpSignatureKey, skpSignatureKey, strPassphrase, new DateTime(lExpiration), true);
TransportablePublicKey tpkPublicKey = new TransportablePublicKey();
tpkPublicKey.PrimaryKey = pkpSignatureKey;
tpkPublicKey.SubKeys.Add(cpsEncryptionKey);
tpkPublicKey.Certifications.Add(cuiUID);
TransportableSecretKey tskSecretKey = new TransportableSecretKey();
tskSecretKey.PrimaryKey = skpSignatureKey;
tskSecretKey.SubKeys.Add(skpEncryptionKey);
tskSecretKey.UserIDs.Add(uipUID);
this.pkrKeyRing.AddPublicKey(tpkPublicKey);
this.skrKeyRing.AddSecretKey(tskSecretKey);
pkrKeyRing.Save();
skrKeyRing.Save();
// it's an RSA key
} else if (strKeyType == "RSA") {
}
}
/// <summary>
/// Parses a single packet out of the given binary
/// data. Even if there are more than one packets in the byte
/// array, only the first packet is returned.
/// </summary>
/// <param name="bBinaryData">A byte array containing a set
/// of OpenPGP packets</param>
/// <returns>Returns an single OpenPGP packets</returns>
/// <remarks>No remarks</remarks>
public virtual Packet ParsePacket(byte[] bBinaryData)
{
Packet pReturnPacket = new Packet();
if ((bBinaryData[0] & 0xC0) == 0xC0) {
pfFormat = PacketFormats.New;
} else if ((bBinaryData[0] & 0xC0) == 0x80) {
pfFormat = PacketFormats.Old;
} else {
throw(new ArgumentException("This is not a valid OpenPGP Packet"));
}
if (pfFormat == PacketFormats.New) {
int iBinaryDataPos = 1;
ctContent = (ContentTypes)(bBinaryData[0] & 0x3F);
lLength = bBinaryData[1];
bBody = new byte[0];
int iHeaderLength = 1;
//partial body lengths
while ((lLength > 223) && (lLength < 255)) {
iBinaryDataPos += 1;
iHeaderLength++;
int lPartialBody = 1 << ((int)(lLength & 0x1F));
int lOldLength = 0;
if (bBody.Length > 0) {
byte[] bOldBody = new byte[bBody.Length];
bBody.CopyTo(bOldBody, 0);
bBody = new byte[bOldBody.Length + lPartialBody];
bOldBody.CopyTo(bBody, 0);
lOldLength = bBody.Length;
} else {
bBody = new byte[lPartialBody];
}
Array.Copy(bBinaryData, iBinaryDataPos, bBody, bBody.Length - lPartialBody, lPartialBody);
lLength = bBinaryData[iBinaryDataPos + lPartialBody];
iBinaryDataPos += lPartialBody;
} //partial bodies must end with a normal header!
if (lLength < 192) {
iHeaderLength++;
bHeader = new byte[iHeaderLength];
if (bBody.Length == 0) {
Array.Copy(bBinaryData, 0, bHeader, 0, 2);
iBinaryDataPos = 1;
}
byte[] bOldBody = new byte[bBody.Length];
bBody.CopyTo(bOldBody, 0);
bBody = new byte[bOldBody.Length + lLength];
bOldBody.CopyTo(bBody, 0);
Array.Copy(bBinaryData, iBinaryDataPos + 1, bBody, bBody.Length - (int)lLength, (int)lLength);
} else if ((lLength > 191) && (lLength < 224)) {
iHeaderLength += 2;
bHeader = new byte[iHeaderLength];
if (bBody.Length == 0) {
Array.Copy(bBinaryData, 0, bHeader, 0, 3);
iBinaryDataPos = 1;
}
lLength = ((bBinaryData[iBinaryDataPos++] - 192) << 8) + bBinaryData[iBinaryDataPos++] + 192;
byte[] bOldBody = new byte[bBody.Length];
bBody.CopyTo(bOldBody, 0);
bBody = new byte[bOldBody.Length + lLength];
bOldBody.CopyTo(bBody, 0);
Array.Copy(bBinaryData, iBinaryDataPos, bBody, bBody.Length - (int)lLength, (int)lLength);
} else if (lLength == 255) {
iHeaderLength += 5;
bHeader = new byte[iHeaderLength];
if (bBody.Length == 0) {
Array.Copy(bBinaryData, 0, bHeader, 0, 6);
iBinaryDataPos = 1;
}
lLength = (bBinaryData[iBinaryDataPos++] << 24) ^ (bBinaryData[iBinaryDataPos++] << 16) ^
(bBinaryData[iBinaryDataPos++] << 8) ^ bBinaryData[iBinaryDataPos++];
byte[] bOldBody = new byte[bBody.Length];
bBody.CopyTo(bOldBody, 0);
bBody = new byte[bOldBody.Length + lLength];
bOldBody.CopyTo(bBody, 0);
Array.Copy(bBinaryData, iBinaryDataPos, bBody, bBody.Length - (int)lLength, (int)lLength);
}
} else {
ctContent = (ContentTypes)((bBinaryData[0] & 0x3C) >> 2);
switch (bBinaryData[0] & 0x03) {
case 0:
lLength = bBinaryData[1];
bHeader = new byte[2];
break;
case 1:
lLength = (bBinaryData[1] << 8) ^ (bBinaryData[2]);
bHeader = new byte[3];
break;
case 2:
lLength = (bBinaryData[1] << 16) ^ (bBinaryData[2] << 8) ^
(bBinaryData[3]);
bHeader = new byte[4];
break;
case 3:
throw new System.NotSupportedException("Packets of indetermined length are not supported due to security considerations!");
default:
throw new System.ApplicationException("This is not a valid Packet!");
}
bBody = new byte[lLength];
Array.Copy(bBinaryData, 0, bHeader, 0, bHeader.Length);
Array.Copy(bBinaryData, bHeader.Length, bBody, 0, (int)lLength);
}
this.bIsUpdated = false;
switch (ctContent) {
case ContentTypes.AsymSessionKey:
pReturnPacket = new AsymSessionKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.Compressed:
pReturnPacket = new CompressedDataPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.LiteralData:
pReturnPacket = new LiteralDataPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.Marker:
pReturnPacket = new Packet(this);
//We can savly ignore Marker packets!
//MessageBox.Show("This is a marker packet. It is not yet supported.");
break;
case ContentTypes.OnePassSignature:
pReturnPacket = new OnePassSignaturePacket(this);
//System.Windows.Forms.MessageBox.Show("This is a One Pass Signature Packet. It is not yet supported");
break;
//Content is Public Key Packet
case ContentTypes.PublicKey:
pReturnPacket = new PublicKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
//Content is Public Subkey Packet. Same format as Public Key Packet
case ContentTypes.PublicSubkey:
pReturnPacket = new PublicKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.SecretKey:
pReturnPacket = new SecretKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.SecretSubkey:
pReturnPacket = new SecretKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.Signature:
pReturnPacket = new SignaturePacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.SymEncrypted:
pReturnPacket = new SymmetricallyEncryptedDataPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.SymSessionKey:
pReturnPacket = new SymSessionKeyPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
case ContentTypes.Trust:
pReturnPacket = new Packet(this);
//throw new Exception("This is a Trust Packet. It is not yet supported");
break;
case ContentTypes.UserID:
pReturnPacket = new UserIDPacket(this);
pReturnPacket = pReturnPacket.ParsePacket(bBody);
break;
default:
pReturnPacket = new Packet(this);
//throw new Exception("Sorry, but this is a packet I don't know about!");
break;
}
pReturnPacket.bIsUpdated = false;
return pReturnPacket;
}