/// <summary>
/// Verifies a key user id certificetion revocation status
/// </summary>
/// <param name="keyID">the key to verify</param>
/// <param name="userID">the user id to verify</param>
/// <param name="certifierKeyID">the key that issued the certification</param>
/// <returns>the revocation status of the user id</returns>
public bool isRevoked(ulong keyID, string userID, ulong certifierKeyID)
{
TransportablePublicKey tpkKey = this.Find(keyID, true);
if (tpkKey == null)
{
return(false);
}
bool found = false;
CertifiedUserID toBeVerified = null;
foreach (CertifiedUserID cui in tpkKey.Certifications)
{
if (cui.UserID.UserID == userID)
{
found = true;
toBeVerified = cui;
break;
}
}
if (!found)
{
throw new Exception("UserId not found among Key certificates");
}
toBeVerified.Validate(tpkKey.PrimaryKey, this);
foreach (SignaturePacket sign in toBeVerified.Certificates)
{
if (sign.SignatureType == SignatureTypes.CertificationRevocationSignature && sign.KeyID == certifierKeyID && sign.SignatureStatus == SignatureStatusTypes.Valid && sign.isRevocable())
{
return(true);
}
}
return(false);
}
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);
}
private SymAlgorithms GetSymAlgorithmPreferences(TransportablePublicKey[] tpkKeys)
{
bool bCAST5 = true;
bool bAES256 = true;
bool bAES192 = true;
bool bAES128 = true;
for (int i = 0; i < tpkKeys.Length; i++)
{
TransportablePublicKey tpkKey = tpkKeys[i];
ulong lKeyID = tpkKey.PrimaryKey.KeyID;
IEnumerator ieCerts = tpkKey.Certifications.GetEnumerator();
while (ieCerts.MoveNext())
{
if (!(ieCerts.Current is CertifiedUserID))
{
continue;
}
CertifiedUserID cuiID = (CertifiedUserID)ieCerts.Current;
IEnumerator ieSigs = cuiID.Certificates.GetEnumerator();
while (ieSigs.MoveNext())
{
if (!(ieSigs.Current is SignaturePacket))
{
continue;
}
SignaturePacket spSig = (SignaturePacket)ieSigs.Current;
if ((spSig.Version == SignaturePacketVersionNumbers.v4) && (spSig.KeyID == lKeyID))
{
try {
bool bTmpCAST5 = false;
bool bTmpAES256 = false;
bool bTmpAES192 = false;
bool bTmpAES128 = false;
SymAlgorithms[] saThisKey = spSig.FindPreferedSymAlgorithms();
for (int j = 0; j < saThisKey.Length; j++)
{
if (saThisKey[j] == SymAlgorithms.AES128)
{
bTmpAES128 = true;
}
else if (saThisKey[j] == SymAlgorithms.AES192)
{
bTmpAES192 = true;
}
else if (saThisKey[j] == SymAlgorithms.AES256)
{
bTmpAES256 = true;
}
else if (saThisKey[j] == SymAlgorithms.CAST5)
{
bTmpCAST5 = true;
}
}
if (!bTmpCAST5)
{
bCAST5 = false;
}
if (!bTmpAES256)
{
bAES256 = false;
}
if (!bTmpAES192)
{
bAES192 = false;
}
if (!bTmpAES128)
{
bAES128 = false;
}
} catch (InvalidOperationException) {}
}
}
}
}
if (bAES256)
{
return(SymAlgorithms.AES256);
}
if (bAES192)
{
return(SymAlgorithms.AES192);
}
if (bAES128)
{
return(SymAlgorithms.AES128);
}
if (bCAST5)
{
return(SymAlgorithms.CAST5);
}
return(SymAlgorithms.Triple_DES);
}
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")
{
}
}
public void SignKey(ulong lSignedKeyID, ulong lSigningKeyID, string strUserID, int nIntroducerDepth, bool bIsExportable, int nType, string strPassphrase)
{
TransportableSecretKey tskKey = skrKeyRing.Find(lSigningKeyID);
SecretKeyPacket skpSignatureKey = tskKey.FindKey(AsymActions.Sign);
TransportablePublicKey tpkKey = pkrKeyRing.Find(lSignedKeyID, false);
SignaturePacket spCertificate = new SignaturePacket();
spCertificate.SignatureType = (SignatureTypes)nType;
spCertificate.Version = SignaturePacketVersionNumbers.v4;
spCertificate.HashAlgorithm = HashAlgorithms.SHA1;
spCertificate.KeyID = skpSignatureKey.PublicKey.KeyID;
spCertificate.TimeCreated = DateTime.Now;
CertifiedUserID cuiID = null;
IEnumerator ieUserIDs = tpkKey.Certifications.GetEnumerator();
while (ieUserIDs.MoveNext())
{
if (!(ieUserIDs.Current is CertifiedUserID))
{
continue;
}
CertifiedUserID cuiThisID = (CertifiedUserID)ieUserIDs.Current;
if (cuiThisID.ToString() == strUserID)
{
cuiID = cuiThisID;
}
}
if (cuiID == null)
{
throw new Exception("UserID could not be found!");
}
if (bIsExportable == false)
{
SignatureSubPacket sspNotExportable = new SignatureSubPacket();
sspNotExportable.Type = SignatureSubPacketTypes.ExportableSignature;
sspNotExportable.ExportableSignature = false;
spCertificate.AddSubPacket(sspNotExportable, true);
}
if (nIntroducerDepth > 0)
{
SignatureSubPacket sspTrust = new SignatureSubPacket();
sspTrust.Type = SignatureSubPacketTypes.TrustSignature;
sspTrust.TrustLevel = (byte)nIntroducerDepth;
sspTrust.TrustAmount = 120;
spCertificate.AddSubPacket(sspTrust, true);
}
cuiID.Sign(spCertificate, skpSignatureKey, strPassphrase, tpkKey.PrimaryKey);
tpkKey.Certifications.Remove(cuiID);
tpkKey.Certifications.Add(cuiID);
pkrKeyRing.Delete(lSignedKeyID);
pkrKeyRing.AddPublicKey(tpkKey);
pkrKeyRing.Save();
}
public string GetPublicKeyProperties(ulong lKeyID)
{
TransportablePublicKey tpkKey = pkrKeyRing.Find(lKeyID, false);
XmlDocument xmlDoc = new XmlDocument();
XmlElement xmlPublicKey = xmlDoc.CreateElement("PublicKey");
xmlPublicKey.SetAttribute("keyid", "0x" + tpkKey.PrimaryKey.KeyID.ToString("x"));
xmlPublicKey.SetAttribute("fingerprint", tpkKey.PrimaryKey.Fingerprint.ToString(16));
xmlPublicKey.SetAttribute("created", tpkKey.PrimaryKey.TimeCreated.Ticks.ToString());
try {
xmlPublicKey.SetAttribute("expiration", tpkKey.KeyExpirationTime.Ticks.ToString());
} catch (System.Exception) {
xmlPublicKey.SetAttribute("expiration", "never");
}
xmlPublicKey.SetAttribute("size", tpkKey.PrimaryKey.KeyMaterial[0].bitCount().ToString());
xmlPublicKey.SetAttribute("algorithm", tpkKey.PrimaryKey.Algorithm.ToString());
XmlElement xmlUserIDs = xmlDoc.CreateElement("UserIDs");
XmlElement xmlUserID;
IEnumerator ieUserIDs = tpkKey.Certifications.GetEnumerator();
while (ieUserIDs.MoveNext())
{
if (!(ieUserIDs.Current is CertifiedUserID))
{
continue;
}
CertifiedUserID cuiUID = (CertifiedUserID)ieUserIDs.Current;
cuiUID.Validate(tpkKey.PrimaryKey, pkrKeyRing);
xmlUserID = xmlDoc.CreateElement("UserID");
xmlUserID.SetAttribute("name", cuiUID.UserID.UserID);
string strPrimary = "false";
if (tpkKey.PrimaryUserID == cuiUID.UserID.UserID)
{
strPrimary = "true";
}
xmlUserID.SetAttribute("primary", strPrimary);
DateTime dtTimeCreated = DateTime.Now;
XmlElement xmlSignature;
IEnumerator ieSignatures = cuiUID.Certificates.GetEnumerator();
while (ieSignatures.MoveNext())
{
if (!(ieSignatures.Current is SignaturePacket))
{
continue;
}
SignaturePacket spSignature = (SignaturePacket)ieSignatures.Current;
xmlSignature = xmlDoc.CreateElement("Signature");
xmlSignature.SetAttribute("keyid", "0x" + spSignature.KeyID.ToString("x"));
xmlSignature.SetAttribute("created", spSignature.TimeCreated.Ticks.ToString());
string strExpiration = "";
try {
strExpiration = spSignature.FindExpirationTime().Ticks.ToString();
} catch (InvalidOperationException) {
strExpiration = "never";
}
xmlSignature.SetAttribute("expiration", strExpiration);
xmlSignature.SetAttribute("signaturestatus", spSignature.SignatureStatus.ToString());
string strCreator = "";
try {
TransportablePublicKey tpkSignatureKey = pkrKeyRing.Find(spSignature.KeyID, false);
strCreator = tpkSignatureKey.PrimaryUserID;
} catch (Exception) {
strCreator = "0x" + spSignature.KeyID.ToString("x");
}
xmlSignature.SetAttribute("creator", strCreator);
xmlSignature.SetAttribute("algorithm", spSignature.SignatureAlgorithm.ToString());
if (spSignature.KeyID == tpkKey.PrimaryKey.KeyID)
{
dtTimeCreated = spSignature.TimeCreated;
}
xmlUserID.AppendChild(xmlSignature);
}
xmlUserID.SetAttribute("created", dtTimeCreated.Ticks.ToString());
xmlUserIDs.AppendChild(xmlUserID);
}
xmlPublicKey.AppendChild(xmlUserIDs);
XmlElement xmlSubkeys = xmlDoc.CreateElement("Subkeys");
XmlElement xmlSubkey;
IEnumerator ieSubkeys = tpkKey.SubKeys.GetEnumerator();
while (ieSubkeys.MoveNext())
{
if (!(ieSubkeys.Current is CertifiedPublicSubkey))
{
continue;
}
CertifiedPublicSubkey cpsSubkey = (CertifiedPublicSubkey)ieSubkeys.Current;
xmlSubkey = xmlDoc.CreateElement("Subkey");
xmlSubkey.SetAttribute("keyid", "0x" + cpsSubkey.Subkey.KeyID.ToString("x"));
xmlSubkey.SetAttribute("fingerprint", cpsSubkey.Subkey.Fingerprint.ToString(16));
xmlSubkey.SetAttribute("created", cpsSubkey.Subkey.TimeCreated.Ticks.ToString());
string strExpiration = "";
try {
strExpiration = cpsSubkey.KeyBindingSignature.FindExpirationTime().Ticks.ToString();
} catch (InvalidOperationException) {
strExpiration = "never";
}
xmlSubkey.SetAttribute("expiration", strExpiration);
xmlSubkey.SetAttribute("size", cpsSubkey.Subkey.KeyMaterial[0].bitCount().ToString());
xmlSubkey.SetAttribute("algorithm", cpsSubkey.Subkey.Algorithm.ToString());
xmlSubkeys.AppendChild(xmlSubkey);
}
xmlPublicKey.AppendChild(xmlSubkeys);
xmlDoc.AppendChild(xmlPublicKey);
return(xmlDoc.OuterXml);
}
