Verify .p7s and Extract Original File

C# example to verify and unpack the contents of a .p7s to restore the original file.

Download Chilkat .NET for 2.0 Framework

Download Chilkat .NET for 1.0 / 1.1 Framework

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

//  Any string argument automatically begins the 30-day trial.
bool success;
success = crypt.UnlockComponent("30-day trial");
if (success != true) {
    MessageBox.Show("Crypt component unlock failed");
    return;
}

//  Find our digital certificate from the Current User certificate store.
Chilkat.CreateCS ccs = new Chilkat.CreateCS();
Chilkat.CertStore certStore = null;
certStore = ccs.OpenCurrentUserStore();
Chilkat.Cert cert = null;
cert = certStore.FindCertBySubjectCN("Chilkat Software, Inc.");
if (cert == null ) {
    MessageBox.Show(cert.LastErrorText);

    return;
}

//  Verify and restore the original file:
crypt.SetVerifyCert(cert);

success = crypt.VerifyP7S("license.p7s","license2.rtf");
if (success == false) {
    MessageBox.Show(crypt.LastErrorText);

    return;
}

MessageBox.Show("Success!");