PGP manifest

Implementation of the PGP manifest encrypted email structure based on Mailpile's article. This project contains two CLI programs to generate and parse sample emails, that act as areference implementation for the standard.

Manifest's structure

{
    "version": "v1.0.0", // Manifest's structure version
    "headers": { // Headers to override
        "from": "rcp@example.org",
        "to": "snd@example.org",
        "subject": "Secret subject"
    },
    "parts": [
        // Definition of the body
        {
            "id": "body",
            "hash": "SHA256 hash of the unencrypted body",
            "content-type": "text/plain"
        },
        // Attachment definitions
        {
            "id": "randomstring1",
            "hash": "SHA256 hash of the unencrypted attachment",
            "content-type": "text/html",
            "filename": "test.html"
        }
    ]
}

Email's structure

multipart/mixed
 |- multipart/alternative
     |- application/pgp-encrypted - Encrypted email body 
     |- text/html                 - HTML containg a link to a remote email reader
     |- text/plain                - Plaintext variant of the fallback message
 |- application/pgp-encrypted; filename=randomstring1.pgp - PGP-encrypted attachment
 |- application/x-pgp-manifest+json; filename=manifest.pgp - PGP-encrypted manifest