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C# class library import to PB
  1. How-to
0 Votes
  1. Ong Chin Keat
  2. PowerBuilder
  3. Monday, 15 July 2024 12:49 AM UTC

hi all,

Sorry I'm not good in VS C#, I just want to complete my job by importing C# Certificate class library into PB and hope anyone can help me. I get an solution from some where that can hashing Certificate. Would like to know how we can convert it into Class Library and import into PB. For this, what value should we pass in for Certificate object "X509Certificate2" ?

Below is the script from C# : 

using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
public class XadesSigner
    {
        public static byte[] SignDigest(string base64Digest, X509Certificate2 certificate)
        {
            if (string.IsNullOrEmpty(base64Digest) || certificate == null)
            {
                throw new ArgumentNullException("Digest and certificate must not be null or empty");
            }
            // Convert base64 digest string to byte array
            byte[] digest = Convert.FromBase64String(base64Digest);
            // Get the private key from the certificate
            using (RSA rsa = certificate.GetRSAPrivateKey())
            {
                if (rsa == null)
                {
                    throw new InvalidOperationException("Certificate does not have an RSA private key");
                }
                // Sign the digest using the RSA private key
                byte[] signedDigest = rsa.SignHash(digest, HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1);
                return signedDigest;
            }
        }
        public static void Main()
        {
            // Example base64-encoded digest value (SHA-256 hash of the data to be signed)
            string base64Digest = "<enter DocDigest String>";
            // Path to the certificate file
            string certificatePath = @"<enter path to PFX file>";
            // Load the certificate from a file or certificate store
            X509Certificate2 certificate = new X509Certificate2(certificatePath, "<Enter PFX Password>");
            // Sign the digest
            byte[] signedDigest = SignDigest(base64Digest, certificate);
            // Print the signed digest in base64
            Console.WriteLine(Convert.ToBase64String(signedDigest));
        }
    }

regards,

Dev Ong

RTE new functions Create Single EXE using PBautoBuild220.exe
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