public void CryptoException_with_message()
{
var e = new CryptoException(Message);
Assert.AreEqual(Message, e.Message);
Assert.IsNull(e.InnerException);
}
public static string ExportToPublicSshKey(X509Certificate2 cert)
{
if (cert == null)
{
throw new ArgumentException(nameof(cert));
}
try
{
return(ExportToSshKey(GetRSACryptoServiceProviderFromPublicKey(cert), false));
}
catch (Exception ex)
{
var outer = new CryptoException(string.Format("Could not ExportToPrivateSshKey; Tumbprint '{0}'. See inner exception for details.", cert.Thumbprint), ex);
throw outer;
}
}
/**
* Create new Idemix Signing Identity with a fresh pseudonym
*
* @param ipk issuer public key
* @param revocationPk the issuer's long term revocation public key
* @param mspId MSP identifier
* @param sk user's secret
* @param cred idemix credential
* @param cri the credential revocation information
* @param ou is OU attribute
* @param role is role attribute
* @throws CryptoException
* @throws InvalidArgumentException
*/
public IdemixSigningIdentity(IdemixIssuerPublicKey ipk, KeyPair revocationPk, string mspId, BIG sk, IdemixCredential cred, CredentialRevocationInformation cri, string ou, IdemixRoles role)
{
// input checks
if (ipk == null)
{
throw new ArgumentException("Issuer Public Key (IPK) must not be null");
}
if (revocationPk == null)
{
throw new ArgumentException("Revocation PK must not be null");
}
if (mspId == null)
{
throw new ArgumentException("MSP ID must not be null");
}
if (string.IsNullOrEmpty(mspId))
{
throw new ArgumentException("MSP ID must not be empty");
}
if (ou == null)
{
throw new ArgumentException("OU must not be null");
}
if (string.IsNullOrEmpty(ou))
{
throw new ArgumentException("OU must not be empty");
}
if (sk == null)
{
throw new ArgumentException("SK must not be null");
}
if (cred == null)
{
throw new ArgumentException("Credential must not be null");
}
if (cri == null)
{
throw new ArgumentException("Credential revocation information must not be null");
}
logger.Trace($"Verifying public key with hash: [{BitConverter.ToString(ipk.Hash).Replace("-", "")}] \nAttributes: [{string.Join(",", ipk.AttributeNames)}]");
if (!ipk.Check())
{
CryptoException e = new CryptoException("Issuer public key is not valid");
logger.Error("", e);
throw e;
}
this.ipk = ipk;
this.sk = sk;
this.cri = cri;
logger.Trace("Verifying the credential");
// cryptographically verify credential
// (check if the issuer's signature is valid)
if (!cred.Verify(sk, ipk))
{
CryptoException e = new CryptoException("Credential is not cryptographically valid");
logger.Error("", e);
throw e;
}
logger.Trace("Checking attributes");
// attribute checks
// 4 attributes are expected:
// - organization unit (disclosed)
// - role: admin or member (disclosed)
// - enrollment id (hidden, for future auditing feature and authorization with CA)
// - revocation handle (hidden, for future revocation support)
if (cred.Attrs.Length != 4)
{
throw new CryptoException($"Error: There are {cred.Attrs.Length} attributes and the expected are 4");
}
byte[] ouBytes = cred.Attrs[0];
byte[] roleBytes = cred.Attrs[1];
byte[] eIdBytes = cred.Attrs[2];
byte[] rHBytes = cred.Attrs[3];
BIG[] attributes = new BIG[4];
attributes[0] = BIG.FromBytes(ouBytes);
attributes[1] = BIG.FromBytes(roleBytes);
attributes[2] = BIG.FromBytes(eIdBytes);
attributes[3] = BIG.FromBytes(rHBytes);
// check that the OU string matches the credential's attribute value
if (!ou.ToBytes().HashModOrder().ToBytes().SequenceEqual(ouBytes))
{
throw new ArgumentException("the OU string does not match the credential");
}
// check that the role matches the credential's attribute value
if (!new BIG((int)role).ToBytes().SequenceEqual(roleBytes))
{
throw new ArgumentException("the role does not match the credential");
}
logger.Trace("Generating fresh pseudonym and proof");
// generate a fresh pseudonym
Pseudonym = new IdemixPseudonym(this.sk, this.ipk);
// generate a fresh proof of possession of a credential
// with respect to a freshly generated pseudonym
Proof = new IdemixSignature(cred, this.sk, Pseudonym, this.ipk, disclosedFlags, msgEmpty, rhIndex, cri);
logger.Trace("Verifying the proof");
// verify the proof
if (!Proof.Verify(disclosedFlags, this.ipk, msgEmpty, attributes, rhIndex, revocationPk, (int)cri.Epoch))
{
throw new CryptoException("Generated proof of identity is not valid");
}
logger.Trace("Generating the Identity Object");
// generate a fresh identity with new pseudonym
idemixIdentity = new IdemixIdentity(mspId, this.ipk, Pseudonym.Nym, ou, role, Proof);
logger.Trace(idemixIdentity.ToString());
}
