Lua

Load .eml and Decrypt (smime.p7m)

Loads an encrypted email from a .eml file and decrypts using certificate w/ private key found in a .p12 (or .pfx) file.

The Content-Type and Content-Disposition email headers of the email to be decrypted look similar to this:

Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data;
	name="smime.p7m"
Content-Disposition: attachment; filename="smime.p7m"

Lua

local chilkat = require("chilkat")

local email = chilkat.Email.new()

-- Add a PFX (or .p12) to be used for decryption
local success = email:add_pfx_source_file("myCert.p12", "passwordForP12")
if not success then
    print(email.last_error_text)
    return
end

-- Loading the .eml automatically decrypts.
success = email:load_eml("encrypted.eml")
if not success then
    print(email.last_error_text)
    return
end

-- The email now exists as it was prior to encryption.
-- Your app may access the email's subject, body, attachments,
-- etc. using the Chilkat Email API...

-- Save the decrypted email:
success = email:save_eml("decrypted.eml")
if not success then
    print(email.last_error_text)
    return
end

print("Success.")