Lua Requires Chilkat v9.5.0.67+

Encrypt MIME using RSAES-OAEP with SHA256 and AES-128 content encryption

See more MIME Examples

Demonstrates how to encrypt MIME using RSAES-OAEP with SHA256 and AES-128 content encryption. Lua

local chilkat = require("chilkat")

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

local mime = chilkat.Mime.new()

-- Create a MIME message to encrypt.
mime:new_multipart_mixed()
mime:add_header_field("someHeader1", "Some value 1")
mime:add_header_field("someHeader2", "Some value 2")

local part0 = chilkat.Mime.new()
part0:add_header_field("hdrA", "Some value A")
part0:add_header_field("hdrB", "Some value B")
part0.content_type = "text/plain"
part0:set_body("This is the plain-text body.")

local part1 = chilkat.Mime.new()
part1:add_header_field("hdrX", "Some value X")
part1:add_header_field("hdrY", "Some value Y")
part1.content_type = "text/xml"
part1:set_body("<a>This is the XML body</a>")

mime:append_part(part0)
mime:append_part(part1)

-- The MIME to be encrypted:
local sbMime = chilkat.StringBuilder.new()
mime:get_mime_sb(sbMime)
print(sbMime:get_as_string())

--     Content-Type: multipart/mixed; boundary="------------080303020600020604010008"
--     someHeader1: Some value 1
--     someHeader2: Some value 2
--
--     --------------080303020600020604010008
--     hdrA: Some value A
--     hdrB: Some value B
--     Content-Type: text/plain
--
--     This is the plain-text body.
--     --------------080303020600020604010008
--     hdrX: Some value X
--     hdrY: Some value Y
--     Content-Type: text/xml
--
--     <a>This is the XML body</a>
--     --------------080303020600020604010008--
--

-- Load an RSA-based certificate.
-- (Encrypting MIME only requires the public key.  Decrypting MIME requires the private key.)
local cert = chilkat.Cert.new()
local success = cert:load_from_file("qa_data/rsaes-oaep/cert.pem")
if not success then
    print(cert.last_error_text)
    return
end

-- Set the email object properties to indicate the desired encryption.
mime.pkcs7_crypt_alg = "aes"
-- If AES-256 is desired, set the following property to 256.
mime.pkcs7_key_length = 128
mime.oaep_padding = true
-- Other choices for the OAEP hash algorithm are "sha1", "sha384", and "sha512"
mime.oaep_hash = "sha256"

-- Encrypt the MIME (to create S/MIME, which stands for "Secure MIME")
success = mime:encrypt(cert)
if not success then
    print(mime.last_error_text)
    return
end

print("---------------")
print("Encrypted MIME:")
print("---------------")
print(mime:get_mime())

print("Success.")

-- ---------------------------------------------------
-- This is sample output for RSAES-OAEP encrypted MIME:
-- ---------------------------------------------------

-- Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="enveloped-data"
-- someHeader1: Some value 1
-- someHeader2: Some value 2
-- Content-Disposition: attachment; filename="smime.p7m"
-- Content-Transfer-Encoding: base64
--
-- MIIDvAYJKoZIhvcNAQcDoIIDrTCCA6kCAQAxggGgMIIBnAIBADB1MGgxCzAJBgNVBAYTAlVTMQsw
-- CQYDVQQIDAJJTDEQMA4GA1UEBwwHV2hlYXRvbjEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQ
-- dHkgTHRkMRcwFQYDVQQDDA5DaGlsa2F0V2lkZ2V0cwIJAMRwugDmvniwMBwGCSqGSIb3DQEBBzAP
-- oA0wCwYJYIZIAWUDBAIBBIIBAFaUL1ga1bOrdqYKcMm+FHUacBvzfBxk0fnPA0AMBdN8BvTWT3CN
-- YuqBhjOGyq0FpYD9pVZybUuFMCVsVyIW2O62HnsOK58YaPEUUcdH2sI+yjqX9UAn0P0nVDSsVdeK
-- W8x9kMfZg+3UP+y1q+lu7VRJO3f2C9oLQpTkc4VW4n7UOcUI0waykLCjCTL8lFDb7/J3GeuMKyhH
-- 5riNz50kpbzqn7m2Ks9yA+QmcTdXclclGFr2vwEUFzSdT2pxh/vaUrogCxkYWbQ2eV7vZg6O4kV0
-- aqHBqySkPTAzHKiHH8K8GVdlTuJ8350CpICa4T8w7/Ht5I7dyOPPKy4C+rVtrvcwggH+BgkqhkiG
-- 9w0BBwEwHQYJYIZIAWUDBAECBBDTC2WNBN+z2I47/4Feu9YqgIIB0MZvl3nC/q/Wzil6HtfQTr12
-- Q5moHY+ORzAa1P9XvX2ZUFhW530mV395mQw/A4o4ekmX9eRPEZquYzZPLT8hNeZIuNdhpcSQUmad
-- rKnKkR0wKJ3jJ3LhOIohVBQSYs8kVDZKq6lJBIznlsurFelZoNEhyRschhteDZx5rb7fCe8c2+/O
-- DHxaqaHCAzm/Bd7kcg6FFfuTZy3tu0PgP5IsXN4OFA3kkvwjAs4XsVS8jdIcmDNBkYieE8WmJOIm
-- Mz7mh/CHWLgWfGKa0Dkb9RcbFgLwYNT3GzuXFw9XPbKkEZjEAtJajWbN6P0WQl96YYd9qZxUpGxZ
-- zjTHEYzViUdUXolfpLufttrRXyxN1RFWhNFMFbv66xYqklMSgpdM/Mbk+EuvX6eXayDPvDBpfYMw
-- NoRAzv1Ony2c0ez9rBemJICicxAzpuvHbRxdjYs63Dnv+TYgpBK12AxWWpPIjXvw0WQKgTC3Tg8s
-- EnuGhpENqso/clJBEBSn4+2WhYtYbdI5sVme67lvqQl1Xxy3r18SWaQbyDOwgYi1E+54lMDOxMy0
-- y0FPHk5pP45DnXWj+XORPp5LhuZr5mf62YOXSSUwR5P0cXy4Rc+pN5lhRQPCf5z2