Go

RSA Signature using Private Key from .snk File

See more RSA Examples

A .snk file (Strong Name Key file) is a file format used in the .NET ecosystem to store an RSA public/private key pair. This key pair is typically used for strong-naming assemblies, which is a process of signing .NET assemblies to ensure their integrity and to uniquely identify them.

This example loads a private key from a .snk file and creates an RSA signature.

Go

    success := false

    rsa := chilkat.NewRsa()

    // Load the .snk and return the private key as XML.
    xmlStr := rsa.SnkToXml("./test.snk")
    if rsa.LastMethodSuccess() == false {
        fmt.Println(rsa.LastErrorText())
        rsa.DisposeRsa()
        return
    }

    privKey := chilkat.NewPrivateKey()
    success = privKey.LoadXml(*xmlStr)
    if success == false {
        fmt.Println(privKey.LastErrorText())
        rsa.DisposeRsa()
        privKey.DisposePrivateKey()
        return
    }

    success = rsa.UsePrivateKey(privKey)
    if success == false {
        fmt.Println(rsa.LastErrorText())
        rsa.DisposeRsa()
        privKey.DisposePrivateKey()
        return
    }

    // Sign the SHA-256 hash of the utf-8 byte representation of the contents of sb
    // Return the signature in base64 format.
    rsa.SetEncodingMode("base64")
    rsa.SetCharset("utf-8")
    sigBase64 := rsa.SignStringENC("This is the text to be hashed and signed.","sha256")
    if rsa.LastMethodSuccess() == false {
        fmt.Println(rsa.LastErrorText())
        rsa.DisposeRsa()
        privKey.DisposePrivateKey()
        return
    }

    fmt.Println("RSA signature as base64: ", *sigBase64)

    rsa.DisposeRsa()
    privKey.DisposePrivateKey()