Lua Requires Chilkat v11.0.0+

RSA Decrypt using PEM

See more RSA Examples

This example demonstrates decryping RSA encrypted data that is base64 encoded. It uses a private key loaded from a PEM file. Lua

local chilkat = require("chilkat")

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

local rsa = chilkat.Rsa.new()

local key = chilkat.PrivateKey.new()

-- Load an RSA private key from an unencrypted PEM file:
-- (To load from an encrypted PEM file, call LoadEncryptedPemFile instead.)

local success = key:load_pem_file("qa_data/rsa/decryptTest/priv.pem")
if not success then
    print(key.last_error_text)
    return
end

-- Make the key available to the RSA object
success = rsa:use_private_key(key)
if not success then
    print(rsa.last_error_text)
    return
end

local encryptedStr = "pP9XFJEsGgxPNHEgNiLB5H5ksCOXDk/G49BPTog1jKLAhYofV4UTH5k2TOYiqRnDnKs8+8uPoN/IxdiGXvuYG8HRzN0HtkhoZO/AxeyaB9S7eddCUlT0Pl2PEB2yQ9HG5rM7jqYOD6MAM4cuX7hqT8fa8tbzJzmBwdfFDBz94bwQjULHiO+gklIBC4vhkXT4yjuvEjxTAKU6tJeZYkBooJNdS/vE5RZRpuF6bGZU41Qc17qFR+iReBq+9f8IMmw8WR8fMbOCaygOfFS1nw7JVsIMGsAIXS8rUaJ/2DfGPfQx5HCiVtTOreGYRUI3esAQjnvUCnavZyQgs53nl7e2aA=="

rsa.encoding_mode = "base64"

local usePrivateKey = true
local decryptedStr = rsa:decrypt_string_enc(encryptedStr, usePrivateKey)

print("Decrypted:")
print(decryptedStr)