// issuerPrivateKey must be set using setIssuerPrivateKey() before calling this method
public FirstIssuanceMessageComposite getFirstMessage(string[] attributesParam, IssuerParametersComposite ipc, int numberOfTokensParam, string sessionID, byte[] hd)
{
/*
* token issuance - generate first message
*/
cOut.write("Issuing U-Prove tokens - generate first message, issuer side");
VerifySessionId(sessionID);
try
{
// specify the attribute values agreed to by the Issuer and Prover
int numberOfAttributes = attributesParam.Length;
byte[][] attributes = new byte[numberOfAttributes][];
for (int i = 0; i < numberOfAttributes; i++)
{
attributes[i] = encoding.GetBytes(attributesParam[i]);
}
IssuerParameters ip = ConvertUtils.convertIssuerParametersComposite(ipc, sessionDB[sessionID]);
byte[] issuerPrivateKey = sessionDB[sessionID].privateKey;
if (issuerPrivateKey == null)
{
cOut.write("Issuer side, issuerPrivateKey is null. Did you forget to add the issuer private key for the given sessionKey?");
return(null);
}
BigInteger bi = new BigInteger(1, issuerPrivateKey);
IssuerKeyAndParameters ikap = new IssuerKeyAndParameters(bi, ip);
// setup the issuer and generate the first issuance message
GroupElement hdG = ip.Gq.CreateGroupElement(hd);
Issuer issuer = new Issuer(ikap, numberOfTokensParam, attributes, null, hdG);
// Store the issuer in issuersDictionary using the sessionKey as key
sessionDB[sessionID].issuer = issuer;
FirstIssuanceMessage fi = issuer.GenerateFirstMessage();
// Convert FirstIssuanceMessage members to serializable FirstIssuanceMessageComposite
FirstIssuanceMessageComposite fic = ConvertUtils.convertFirstIssuanceMessage(fi);
// Add the sessionKey to FirstIssuanceMessageComposite
fic.SessionKey = sessionID;
return(fic);
}
catch (Exception e)
{
cOut.write(e.ToString());
DebugUtils.DebugPrint(e.StackTrace.ToString());
}
return(null);
}
public static FirstIssuanceMessage convertFirstIssuanceMessageComposite(FirstIssuanceMessageComposite fic, IssuerParameters ip)
{
GroupElement[] geArray1 = new GroupElement[fic.SigmaA.Length];
for (int i = 0; i < fic.SigmaA.Length; i++)
{
geArray1[i] = ip.Gq.CreateGroupElement(fic.SigmaA[i]);
}
GroupElement[] geArray2 = new GroupElement[fic.SigmaB.Length];
for (int i = 0; i < fic.SigmaB.Length; i++)
{
geArray2[i] = ip.Gq.CreateGroupElement(fic.SigmaB[i]);
}
FirstIssuanceMessage fi = new FirstIssuanceMessage(ip.Gq.CreateGroupElement(fic.SigmaZ), geArray1, geArray2);
return fi;
}
public static FirstIssuanceMessage convertFirstIssuanceMessageComposite(FirstIssuanceMessageComposite fic, IssuerParameters ip)
{
GroupElement[] geArray1 = new GroupElement[fic.SigmaA.Length];
for (int i = 0; i < fic.SigmaA.Length; i++)
{
geArray1[i] = ip.Gq.CreateGroupElement(fic.SigmaA[i]);
}
GroupElement[] geArray2 = new GroupElement[fic.SigmaB.Length];
for (int i = 0; i < fic.SigmaB.Length; i++)
{
geArray2[i] = ip.Gq.CreateGroupElement(fic.SigmaB[i]);
}
FirstIssuanceMessage fi = new FirstIssuanceMessage(ip.Gq.CreateGroupElement(fic.SigmaZ), geArray1, geArray2);
return(fi);
}
public static FirstIssuanceMessageComposite convertFirstIssuanceMessage(FirstIssuanceMessage fi)
{
FirstIssuanceMessageComposite fic = new FirstIssuanceMessageComposite();
byte[][] byteArray1 = new byte[fi.sigmaA.Length][];
for (int i = 0; i < byteArray1.Length; i++)
{
byteArray1[i] = fi.sigmaA[i].GetEncoded();
}
byte[][] byteArray2 = new byte[fi.sigmaB.Length][];
for (int i = 0; i < byteArray2.Length; i++)
{
byteArray2[i] = fi.sigmaB[i].GetEncoded();
}
fic.SigmaA = byteArray1;
fic.SigmaB = byteArray2;
fic.SigmaZ = fi.sigmaZ.GetEncoded();
return(fic);
}
public static FirstIssuanceMessageComposite convertFirstIssuanceMessage(FirstIssuanceMessage fi)
{
FirstIssuanceMessageComposite fic = new FirstIssuanceMessageComposite();
byte[][] byteArray1 = new byte[fi.sigmaA.Length][];
for (int i = 0; i < byteArray1.Length; i++)
{
byteArray1[i] = fi.sigmaA[i].GetEncoded();
}
byte[][] byteArray2 = new byte[fi.sigmaB.Length][];
for (int i = 0; i < byteArray2.Length; i++)
{
byteArray2[i] = fi.sigmaB[i].GetEncoded();
}
fic.SigmaA = byteArray1;
fic.SigmaB = byteArray2;
fic.SigmaZ = fi.sigmaZ.GetEncoded();
return fic;
}
public SecondIssuanceMessageComposite getSecondMessage(string[] attributesParam, IssuerParametersComposite ipc, int numberOfTokensParam, FirstIssuanceMessageComposite firstMessage, string sessionID)
{
/*
* token issuance - generate second message
*/
cOut.write("Issuing U-Prove tokens - generate second message, prover side");
VerifySessionId(sessionID);
try
{
string tokenInformationParam = null;
string proverInformationParam = null;
// specify the attribute values agreed to by the Issuer and Prover
int numberOfAttributes = attributesParam.Length;
byte[][] attributes = new byte[numberOfAttributes][];
for (int i = 0; i < numberOfAttributes; i++)
{
attributes[i] = encoding.GetBytes(attributesParam[i]);
}
// specify the special field values
byte[] tokenInformation = (tokenInformationParam == null) ? new byte[] { } : encoding.GetBytes(tokenInformationParam);
byte[] proverInformation = (proverInformationParam == null) ? new byte[] { } : encoding.GetBytes(proverInformationParam);
// specify the number of tokens to issue
int numberOfTokens = numberOfTokensParam;
IssuerParameters ip = ConvertUtils.convertIssuerParametersComposite(ipc, sessionDB[sessionID]);
// Convert serializable FirstIssuanceMessageComposite members to FirstIssuanceMessage
FirstIssuanceMessage fi = ConvertUtils.convertFirstIssuanceMessageComposite(firstMessage, ip);
// setup the prover and generate the second issuance message
Prover prover = new Prover(ip, numberOfTokens, attributes, tokenInformation, proverInformation, sessionDB[sessionID].deviceManager.GetDevice());
// Store the prover in proversDictionary using the sessionKey as key
sessionDB[sessionID].prover = prover;
SecondIssuanceMessage sm = prover.GenerateSecondMessage(fi);
// Convert SecondIssuanceMessage members to serializable SecondIssuanceMessageComposite
SecondIssuanceMessageComposite smc = ConvertUtils.convertSecondIssuanceMessage(sm);
// Add the sessionKey to SecondIssuanceMessageComposite
smc.SessionKey = sessionID;
return(smc);
}
catch (Exception e)
{
cOut.write(e.ToString());
DebugUtils.DebugPrint(e.StackTrace.ToString());
}
return(null);
}
public SecondIssuanceMessageComposite getSecondMessage(string[] attributesParam, IssuerParametersComposite ipc, int numberOfTokensParam, FirstIssuanceMessageComposite firstMessage, string sessionID)
{
/*
* token issuance - generate second message
*/
cOut.write("Issuing U-Prove tokens - generate second message, prover side");
VerifySessionId(sessionID);
try
{
string tokenInformationParam = null;
string proverInformationParam = null;
// specify the attribute values agreed to by the Issuer and Prover
int numberOfAttributes = attributesParam.Length;
byte[][] attributes = new byte[numberOfAttributes][];
for (int i = 0; i < numberOfAttributes; i++)
{
attributes[i] = encoding.GetBytes(attributesParam[i]);
}
// specify the special field values
byte[] tokenInformation = (tokenInformationParam == null) ? new byte[] { } : encoding.GetBytes(tokenInformationParam);
byte[] proverInformation = (proverInformationParam == null) ? new byte[] { } : encoding.GetBytes(proverInformationParam);
// specify the number of tokens to issue
int numberOfTokens = numberOfTokensParam;
IssuerParameters ip = ConvertUtils.convertIssuerParametersComposite(ipc, sessionDB[sessionID]);
// Convert serializable FirstIssuanceMessageComposite members to FirstIssuanceMessage
FirstIssuanceMessage fi = ConvertUtils.convertFirstIssuanceMessageComposite(firstMessage, ip);
// setup the prover and generate the second issuance message
Prover prover = new Prover(ip, numberOfTokens, attributes, tokenInformation, proverInformation, sessionDB[sessionID].deviceManager.GetDevice());
// Store the prover in proversDictionary using the sessionKey as key
sessionDB[sessionID].prover = prover;
SecondIssuanceMessage sm = prover.GenerateSecondMessage(fi);
// Convert SecondIssuanceMessage members to serializable SecondIssuanceMessageComposite
SecondIssuanceMessageComposite smc = ConvertUtils.convertSecondIssuanceMessage(sm);
// Add the sessionKey to SecondIssuanceMessageComposite
smc.SessionKey = sessionID;
return smc;
}
catch (Exception e)
{
cOut.write(e.ToString());
DebugUtils.DebugPrint(e.StackTrace.ToString());
}
return null;
}
