C#

CAdES BES Detached Signature

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Demonstrates how to create a CAdES BES detached signature file (.p7s). C#

bool success = false;

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

// Use a digital certificate and private key from a PFX file (.pfx or .p12).
string pfxPath = "/Users/chilkat/testData/pfx/acme.pfx";
string pfxPassword = "test123";

Chilkat.Cert cert = new Chilkat.Cert();
success = cert.LoadPfxFile(pfxPath,pfxPassword);
if (success != true) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

// Tell the crypt component to use this cert.
success = crypt.SetSigningCert(cert);
if (success != true) {
    Debug.WriteLine(crypt.LastErrorText);
    return;
}

// The CadesEnabled property applies to all methods that create PKCS7 signatures. 
// To create a CAdES-BES signature, set this property equal to true. 
crypt.CadesEnabled = true;

// We can sign any type of file, creating a .p7s as output:
string inFile = "/Users/chilkat/testData/pdf/sample.pdf";
string sigFile = "/Users/chilkat/testData/p7s/sample.p7s";

// Create the detached CAdES-BES signature:
success = crypt.CreateP7S(inFile,sigFile);
if (success == false) {
    Debug.WriteLine(crypt.LastErrorText);
    return;
}

success = crypt.VerifyP7S(inFile,sigFile);
if (success == false) {
    Debug.WriteLine(crypt.LastErrorText);
    return;
}

Debug.WriteLine("Success!");