Go

RSA Sign Using Private Key from .pfx/.p12 to Base64 Signature

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Demonstrates how to RSA sign something using a private key loaded from a .pfx/.p12. The RSA signature is returned in Base64 encoded format. Go

    success := false

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

    rsa := chilkat.NewRsa()

    // Load the .pfx/.p12
    pfx := chilkat.NewPfx()
    success = pfx.LoadPfxFile("qa_data/pfx/myKey.p12","myPassword")
    if success == false {
        fmt.Println(pfx.LastErrorText())
        rsa.DisposeRsa()
        pfx.DisposePfx()
        return
    }

    // Get the default private key.

    privKey := chilkat.NewPrivateKey()
    success = pfx.PrivateKeyAt(0,privKey)
    if success == false {
        fmt.Println(pfx.LastErrorText())
        rsa.DisposeRsa()
        pfx.DisposePfx()
        privKey.DisposePrivateKey()
        return
    }

    // Import the private key into the RSA component:
    success = rsa.UsePrivateKey(privKey)
    if success == false {
        fmt.Println(rsa.LastErrorText())
        rsa.DisposeRsa()
        pfx.DisposePfx()
        privKey.DisposePrivateKey()
        return
    }

    // Get the signature in base64
    rsa.SetEncodingMode("base64")

    strData := "This is the string to be signed."

    // Sign the string using the sha256 hash algorithm.
    // Other valid choices are "sha384", "sha512", "sha-1", "md2" and "md5".
    base64Sig := rsa.SignStringENC(strData,"sha256")

    fmt.Println(*base64Sig)

    fmt.Println("Success!")

    rsa.DisposeRsa()
    pfx.DisposePfx()
    privKey.DisposePrivateKey()