(Go) RSA Sign using Base64 Private Key

Signs a string using a non-encrypted RSA private key in base64 encoding. Returns the RSA signature as a base64 string.

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

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

    privKey := chilkat.NewPrivateKey()
    var success bool

    sbPem := chilkat.NewStringBuilder()
    sbPem.AppendLine("-----BEGIN RSA PRIVATE KEY-----",true)
    sbPem.AppendLine("MIIC .... j5A==",true)
    sbPem.AppendLine("-----END RSA PRIVATE KEY-----",true)

    success = privKey.LoadPem(*sbPem.GetAsString())
    if success != true {
        fmt.Println(privKey.LastErrorText())
        privKey.DisposePrivateKey()
        sbPem.DisposeStringBuilder()
        return
    }

    rsa := chilkat.NewRsa()

    success = rsa.ImportPrivateKeyObj(privKey)
    if success != true {
        fmt.Println(rsa.LastErrorText())
        privKey.DisposePrivateKey()
        sbPem.DisposeStringBuilder()
        rsa.DisposeRsa()
        return
    }

    rsa.SetEncodingMode("base64")
    strSigned := rsa.OpenSslSignStringENC("12345678")
    fmt.Println(*strSigned)

    strOriginal := rsa.OpenSslVerifyStringENC(*strSigned)
    fmt.Println(*strOriginal)

    privKey.DisposePrivateKey()
    sbPem.DisposeStringBuilder()
    rsa.DisposeRsa()