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Sign a File to Create a .p7m File
C# example to sign a file creating a .p7m file as output. The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M. 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; certStore = ccs.OpenCurrentUserStore(); Chilkat.Cert cert; cert = certStore.FindCertBySubjectCN("Chilkat Software, Inc."); if (cert == null ) { MessageBox.Show(cert.LastErrorText); return; } // Tell the crypt component to use this cert. crypt.SetSigningCert(cert); // We can sign any type of file, creating a .p7s as output: success = crypt.CreateP7M("test.xml","test.p7m"); if (success == false) { MessageBox.Show(crypt.LastErrorText); return; } // Verify and restore the original file: crypt.SetVerifyCert(cert); success = crypt.VerifyP7M("test.p7m","testRestored.xml"); if (success == false) { MessageBox.Show(crypt.LastErrorText); return; } MessageBox.Show("Success!"); |
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