Lua

Generate new DSA Key from OpenSSL Parameters File

See more DSA Examples

Generates a new DSA key from an OpenSSL-created parameters file (DER and PEM formats supported). Examples of using OpenSSL to create parameter files are shown here:

openssl dsaparam -outform DER 1024 <  seedData.txt >dsaparam.der

openssl dsaparam 1024 < seedData.txt >dsaparam.pem

Lua

local chilkat = require("chilkat")

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

local dsa = chilkat.Dsa.new()

local success = dsa:gen_key_from_params_der_file("dsaparam.der")
if not success then
    print(dsa.last_error_text)
    return
end

-- To generate a key from PEM, call GenKeyFromParamsPem
-- (for an in-memory PEM string) or GenKeyFromParamsFilePem
-- for a PEM file.

-- The public and private keys may now be exported to PEM, DER,
-- and XML formatted files.

-- First for the public key...
-- The public key never needs to be encrypted.

-- Save the public key in PEM format:
local pemStr = dsa:to_public_pem()
-- This example will not check the return value of SaveText...
success = dsa:save_text(pemStr, "dsa_pub.pem")

-- Save the public key in DER format:
success = dsa:to_public_der_file("dsa_pub.der")

local bPublicOnly = true
-- Save to XML
local xmlStr = dsa:to_xml(bPublicOnly)
success = dsa:save_text(pemStr, "dsa_pub.xml")

-- ------------------------------------
-- Now for the private key....
-- ------------------------------------

-- Unencrypted PEM:
pemStr = dsa:to_pem()
success = dsa:save_text(pemStr, "dsa_priv.pem")

-- Encrypted PEM:
pemStr = dsa:to_encrypted_pem("myPassword")
success = dsa:save_text(pemStr, "dsa_privEncrypted.pem")

-- DER:
success = dsa:to_der_file("dsa_priv.der")

-- XML:
bPublicOnly = false
xmlStr = dsa:to_xml(bPublicOnly)
success = dsa:save_text(pemStr, "dsa_priv.xml")

print("Finished!")