Lua Requires Chilkat v11.0.0+

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.

Lua

local chilkat = require("chilkat")

local rsa = chilkat.Rsa.new()

-- Load the .snk and return the private key as XML.
local xmlStr = rsa:snk_to_xml("./test.snk")
if not rsa.last_method_success then
    print(rsa.last_error_text)
    return
end

local privKey = chilkat.PrivateKey.new()
local success = privKey:load_xml(xmlStr)
if not success then
    print(privKey.last_error_text)
    return
end

success = rsa:use_private_key(privKey)
if not success then
    print(rsa.last_error_text)
    return
end

-- Sign the SHA-256 hash of the utf-8 byte representation of the contents of sb
-- Return the signature in base64 format.
rsa.encoding_mode = "base64"
rsa.charset = "utf-8"
local sigBase64 = rsa:sign_string_enc("This is the text to be hashed and signed.", "sha256")
if not rsa.last_method_success then
    print(rsa.last_error_text)
    return
end

print("RSA signature as base64: " .. sigBase64)