(Go) Create PKCS7 Signed File (.p7m)

Demonstrates how to sign a file to create a .p7m that contains both the file contents and the signature.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    crypt := chilkat.NewCrypt2()

    certStore := chilkat.NewCertStore()

    // Load a PFX file into a certificate store object.
    success := certStore.LoadPfxFile("myPfx.pfx","pfxPassword")
    if success != true {
        fmt.Println(certStore.LastErrorText())
        crypt.DisposeCrypt2()
        certStore.DisposeCertStore()
        return
    }

    // Get the certificate by subject common name.
    // This should be the cert within the PFX that also
    // has a private key (also stored within the PFX).
    cert := certStore.FindCertBySubjectCN("myCert")
    if certStore.LastMethodSuccess() == false {
        fmt.Println(certStore.LastErrorText())
        crypt.DisposeCrypt2()
        certStore.DisposeCertStore()
        return
    }

    // Tell the crypt object to use the certificate for signing:
    success = crypt.SetSigningCert(cert)

    // Sign a file, producing a .p7m as output.
    // The input file is unchanged, the test.p7m contains the 
    // contents of the input file and the signature.
    inFile := "test.txt"
    outFile := "testp7m"
    success = crypt.CreateP7M(inFile,outFile)
    if success != true {
        fmt.Println(crypt.LastErrorText())
        crypt.DisposeCrypt2()
        certStore.DisposeCertStore()
        return
    }

    fmt.Println("Success!")

    crypt.DisposeCrypt2()
    certStore.DisposeCertStore()