python-dkim

python-dkim is a libopendkim interface for python. It provides for most common use-cases of signing and verifying DKIM signatures of e-mails.

Installation

pip install python-dkim

Usage

Signing

A running example is available under examples/signing.py

import dkim
from email.parser import Parser

    message = """From: Example <[email protected]>
This is a message body.  Fun!
"""
selector = "_dkim"
signing_domain = "example.com"
secret_key = "-----BEGIN RSA PRIVATE KEY-----\n" \
             "MIICXQIBAAKBgQC4GUGr+d/6SFNzVLYpphnRd0QPGKz2uWnV65RAxa1Pw352Bqiz\n" \
             "qiKOBjgYGzj8pJQSs8tOvv/2k6jpI809RnESqOFgF0gu3UJbNnu3+cd8k/kiQj+q\n" \
             "4cKKRpAT92ccxc7svhCNgN1sBGmROYZuysG3Vu3Dyc079gSLtnSrgXb+gQIDAQAB\n" \
             "AoGAemlI0opm1Kvs2T4VliH8/tvX5FXbBH8LEZQAUwVeFTB/UQlieXyCV39pIxZO\n" \
             "0Sa50qm8YNL9rb5HTSZiHQFOwyAKNqS4m/7JCsbuH4gQkPgPF561BHNL9oKfYgJq\n" \
             "9P4kEFfDTBoXKBMxwWtT7AKV8dYvCa3vYzPQ/1BnqQdw2zECQQDyscdgR9Ih59PQ\n" \
             "b72ddibdsxS65uXS2vzYLe7SKl+4R5JgJzw0M6DTAnoYFf6JAsKGZM15PCC0E16t\n" \
             "RRo47U9VAkEAwjEVrlQ0/8yPACbDggDJg/Zz/uRu1wK0zjqj4vKjleubaX4SEvj7\n" \
             "r6xxZm9hC1pMJAC9y3bbkbgCRBjXfyY6fQJBANe5aq2MaZ41wTOPf45NjbKXEiAo\n" \
             "SbUpboKCIbyyaa8V/2h0t7D3C0dE9l4efsguqdZoF7Rh2/f1F70QpYRgfJkCQQCH\n" \
             "oRrAeGXP50JVW72fNgeJGH/pnghgOa6of0JpxwhENJuGMZxUDfxTtUA6yD3iXP3j\n" \
             "A3WL/wbaHsfOYf9Y+g1NAkAGLhx67Ah+uBNK4Xvfz0YPGINX20m+CMsxAw7FOaNv\n" \
             "IW2oWFfZCB4APkIis79Ql45AHpavwx5XodBMzZwJUvlL\n" \
             "-----END RSA PRIVATE KEY-----\n"

message = Parser().parsestr(text=message)
dkim.Signer(message, selector, signing_domain, secret_key.encode()).add_signature_to_message()
print(message.as_string())
  

Verify

import dkim
from email.parser import Parser

dkim.Verifier(message).verify())

Building

Requirements

libopendkim>=2.10 cython

In order to install the library, as usual:

python3 setup.py install