private Boolean verifyCamelotPSS(RSAParameters rsaParams, string hashAlgorithm, byte[] plainBytes, byte[] signatureBytes)
{
try
{
camelot.RSAManaged myRsaCsp =
new camelot.RSAManaged(null, rsaParams.Exponent, rsaParams.Modulus);
camelot.HashAlgorithm hashAlg = selectCamelotHashAlgorithm(hashAlgorithm);
// Decrypt using Camelot OAEP + SHA2
camelot.RSAPSSSignatureDeformatter netPssDeformatter =
new camelot.RSAPSSSignatureDeformatter(myRsaCsp, hashAlg);
Boolean verified =
netPssDeformatter.VerifySignature(plainBytes, signatureBytes);
return(verified);
}
catch (Exception ex)
{
throw ex;
}
}
private byte[] encryptCamelotOAEP(RSAParameters rsaParams, string hashAlgorithm, byte[] plainBytes)
{
try
{
camelot.RSAManaged myRsaCsp =
new camelot.RSAManaged(null, rsaParams.Exponent, rsaParams.Modulus);
camelot.HashAlgorithm hashAlg = selectCamelotHashAlgorithm(hashAlgorithm);
// Decrypt using Camelot OAEP + SHA2
camelot.RSAOAEPKeyExchangeFormatter netOaepFormatter =
new camelot.RSAOAEPKeyExchangeFormatter(myRsaCsp, hashAlg, rng);
byte[] cipherBytes =
netOaepFormatter.CreateKeyExchange(plainBytes);
return(cipherBytes);
}
catch (Exception ex)
{
return(ByteConverter.GetBytes(ex.Message));
}
}
private byte[] signCamelotPSS(RSAParameters rsaParams, string hashAlgorithm, byte[] plainBytes)
{
try
{
camelot.RSAManaged myRsaCsp =
new camelot.RSAManaged(rsaParams.D, null, rsaParams.Modulus);
camelot.HashAlgorithm hashAlg = selectCamelotHashAlgorithm(hashAlgorithm);
// Decrypt using Camelot OAEP + SHA2
camelot.RSAPSSSignatureFormatter netPssFormatter =
new camelot.RSAPSSSignatureFormatter(myRsaCsp, hashAlg, rng);
byte[] signatureBytes =
netPssFormatter.CreateSignature(plainBytes);
return(signatureBytes);
}
catch (Exception ex)
{
return(ByteConverter.GetBytes(ex.Message));
}
}
private byte[] decryptCamelotOAEP(RSAParameters rsaParams, string hashAlgorithm, byte[] cipherBytes)
{
try
{
camelot.RSAManaged myRsaCsp =
new camelot.RSAManaged(rsaParams.D, null, rsaParams.Modulus);
camelot.HashAlgorithm hashAlg = selectCamelotHashAlgorithm(hashAlgorithm);
// Decrypt using Camelot OAEP + SHA2
camelot.RSAOAEPKeyExchangeDeformatter netOaepDeformatter1 =
new camelot.RSAOAEPKeyExchangeDeformatter(myRsaCsp, hashAlg);
byte[] decryptedActual =
netOaepDeformatter1.DecryptKeyExchange(cipherBytes);
return(decryptedActual);
}
catch (Exception ex)
{
return(ByteConverter.GetBytes(ex.Message));
}
}