Encrypt MIME for Multiple Recipients

See more MIME Examples

Demonstrates encrypting the current MIME entity for several recipients at once. A certificate is added for each recipient with AddEncryptCert, and EncryptN then produces a single CMS/PKCS #7 message that each recipient can independently decrypt.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

local chilkat = require("chilkat")

local mime = chilkat.Mime.new()
local success = mime:set_body_from_plain_text("This message will be encrypted.")
if not success then
    print(mime.last_error_text)
    return
end

-- Add a certificate for each intended recipient.  Every recipient receives an independently
-- wrapped copy of the message key.
local cert1 = chilkat.Cert.new()
success = cert1:load_from_file("qa_data/recipient1.cer")
if not success then
    print(cert1.last_error_text)
    return
end

success = mime:add_encrypt_cert(cert1)
if not success then
    print(mime.last_error_text)
    return
end

local cert2 = chilkat.Cert.new()
success = cert2:load_from_file("qa_data/recipient2.cer")
if not success then
    print(cert2.last_error_text)
    return
end

success = mime:add_encrypt_cert(cert2)
if not success then
    print(mime.last_error_text)
    return
end

-- Encrypt for every added recipient at once.
success = mime:encrypt_n()
if not success then
    print(mime.last_error_text)
    return
end

success = mime:save_mime("qa_output/encrypted_multi.eml")
if not success then
    print(mime.last_error_text)
    return
end

print("Message encrypted for multiple recipients.")