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(C# UWP/WinRT) Sign String to create a CAdES-T SignatureThis example will sign a string to create a CAdEST-T signature. Note: This example requires Chilkat v9.5.0.78 or greater.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Chilkat.Crypt2 crypt = new Chilkat.Crypt2(); // This example will use the certificate + private key currently inserted into a smartcard reader. Chilkat.Cert cert = new Chilkat.Cert(); // If we wish to provide the smartcard PIN (otherwise the user will be prompted by the operating system). cert.SmartCardPin = "000000"; bool success = cert.LoadFromSmartcard(""); if (success != true) { Debug.WriteLine(cert.LastErrorText); return; } // Note: It is also possible to use certs from .pfx/.p12, .pem, or other sources such as // pre-installed Windows certificates. success = crypt.SetSigningCert(cert); // Use SHA-256 rather than the default of SHA-1 crypt.HashAlgorithm = "sha256"; // Create JSON that tells Chilkat what signing attributes to include: Chilkat.JsonObject attrs = new Chilkat.JsonObject(); attrs.UpdateBool("contentType",true); attrs.UpdateBool("signingTime",true); attrs.UpdateBool("messageDigest",true); attrs.UpdateBool("signingCertificateV2",true); // A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority). // We must include the TSA's URL, as well as a few options to indicate what is desired. // Except for the TSA URL, the options shown here are typically what you would need. attrs.UpdateBool("timestampToken.enabled",true); attrs.UpdateString("timestampToken.tsaUrl","https://freetsa.org/tsr"); attrs.UpdateBool("timestampToken.addNonce",false); attrs.UpdateBool("timestampToken.requestTsaCert",true); attrs.UpdateString("timestampToken.hashAlg","sha256"); crypt.SigningAttributes = attrs.Emit(); string strToSign = "THIS IS MY ID"; Chilkat.BinData bd = new Chilkat.BinData(); bd.AppendString(strToSign,"utf-8"); // This creates the CAdES-T signature. During the signature creation, it // communicates with the TSA to get a timestampToken. // The contents of bd are signed and replaced with the CAdES-T signature (which embeds the original content). success = await crypt.OpaqueSignBdAsync(bd); if (success != true) { Debug.WriteLine(crypt.LastErrorText); return; } // Get the signature in base64 format: Debug.WriteLine(bd.GetEncoded("base64_mime")); // Or save the signature to a file. bd.WriteFile("qa_output/cades-t_sample.p7m"); Debug.WriteLine("Success."); |
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