Lua

Write PKCS1 or PKCS8 Public Key PEM

See more PEM Examples

Demonstrates how to write either PKCS1 or PKCS8 format PEM files. PKCS1 public keys have this PEM format:

-----BEGIN RSA PUBLIC KEY-----
BASE64 ENCODED DATA
-----END RSA PUBLIC KEY-----

PKCS8 public keys have this PEM format:

-----BEGIN PUBLIC KEY-----
BASE64 ENCODED DATA
-----END PUBLIC KEY-----

Lua

local chilkat = require("chilkat")

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

local success = false

local pem = chilkat.Pem.new()

-- Load a public key from a PEM file.
-- (Assume the PEM contains at least one public key..)
success = pem:load_pem_file("/Users/chilkat/testData/pem/myPublicKey.pem", "")
if not success then
    print(pem.last_error_text)
    return
end

local numPublicKeys = pem.num_public_keys
if numPublicKeys == 0 then
    print("Error: Expected the PEM to contain public keys.")
    return
end

-- Get each public key as PEM, first in PKCS1 format, then in PKCS8.
for i = 1, numPublicKeys do
    -- First output to PKCS1 PEM format:
    print("This is PKCS1 format:")
    pem.public_key_format = "pkcs1"
    print(pem:to_pem())

    -- Now PKCS8 PEM format:
    print("This is PKCS8 format:")
    pem.public_key_format = "pkcs8"
    print(pem:to_pem())
end