如何使用Python GPG发送加密邮件（带附件）

Question

我有，我想在一个给定的文件夹，电子邮件新生成文件的脚本。我已经能够生成和使用的smtplib，电子邮件和UU发送电子邮件（不加密）。我也设法成功地发送不带附件的加密的GPG。

发送带有附件的GPG加密的电子邮件已经然而一个挑战。

我用的python-GNUPG库来创建该文件的密文，我想我可能只是电子邮件，作为电子邮件的正文。这是一起什么，我尝试了线。

from email.mime.text import MIMEText
import gnupg
gpg = gnupg.GPG(gnupghome=GPG_HOME_HOME)
with open(FILE_PATH, "rb") as f:
    cipher_text = str(gpg.encrypt(FILE_PATH.read(), RECIPIENT_EMAIL)

msg = MIMEText(cipher_text, "plain")
msg["Subject"] = "***TEST***"
msg["From"] = EMAIL_SENDER
msg["To"] = EMAIL_RECIPIENT
msg_text = msg.as_string()

我也试过在https://docs.python.org/release/3.5.3/library/email-examples.html调整为例，我自己的需要，但我还没有成功的，要么。

我的GPG设置正确，我能发送/接收GPG加密的电子邮件就好雷鸟/的enigmail。

可能有人请告诉我如何发送GPG加密邮件带附件？我相信这需要电子邮件结构的一些低级别的操作，但我不是太熟悉。

谢谢，

Answer 1

这是我设法拿出来获得与附件的工作GnuPG的加密电子邮件。我用的enigmail使用作为模板雷鸟发送了一封电子邮件。

from email.mime.base import MIMEBase
from email.message import Message
import base64
import mimetypes
import os

import gnupg # python-gnupg

def get_email_string(email_address_recipient, file_path_attachment, email_message=""):
    def get_base64_file(file_path):
        with open(file_path, "rb") as f:
            b_str = base64.b64encode(f.read())
        return b_str

    def get_mimetype(file_path):
        return mimetypes.guess_type(file_path)[0]

    def get_file_name(file_path):
        return os.path.basename(file_path)

    def get_gpg_cipher_text(string, recipient_email_address):
        gpg = gnupg.GPG(gnupghome=DIR_GNUPG)
        encrypted_str = str(gpg.encrypt(string, recipient_email_address))
        return encrypted_str


    msg = Message()
    msg.add_header(_name="Content-Type", _value="multipart/mixed", protected_headers="v1")
    msg["From"] = EMAIL_FROM
    msg["To"] = email_address_recipient

    msg_text = Message()
    msg_text.add_header(_name="Content-Type", _value="multipart/mixed")
    msg_text.add_header(_name="Content-Language", _value="en-US")

    msg_body = Message()
    msg_body.add_header(_name="Content-Type", _value="text/plain", charset="utf-8")
    msg_body.add_header(_name="Content-Transfer-Encoding", _value="quoted-printable")
    msg_body.set_payload(email_message + 2*"\n")

    msg_attachment = Message()
    msg_attachment.add_header(_name="Content-Type", _value=get_mimetype(file_path_attachment), name=get_file_name(file_path_attachment))
    msg_attachment.add_header(_name="Content-Transfer-Encoding", _value="base64")
    msg_attachment.add_header(_name="Content-Disposition", _value="attachment", filename=get_file_name(file_path_attachment))
    msg_attachment.set_payload(get_base64_file(file_path_attachment))

    msg_text.attach(msg_body)
    msg_text.attach(msg_attachment)
    msg.attach(msg_text)


    pgp_msg = MIMEBase(_maintype="multipart", _subtype="encrypted", protocol="application/pgp-encrypted")
    pgp_msg["From"] = EMAIL_FROM
    pgp_msg["To"] = email_address_recipient

    pgp_msg_part1 = Message()
    pgp_msg_part1.add_header(_name="Content-Type", _value="application/pgp-encrypted")
    pgp_msg_part1.add_header(_name="Content-Description", _value="PGP/MIME version identification")
    pgp_msg_part1.set_payload("Version: 1" + "\n")

    pgp_msg_part2 = Message()
    pgp_msg_part2.add_header(_name="Content-Type", _value="application/octet-stream", name="encrypted.asc")
    pgp_msg_part2.add_header(_name="Content-Description", _value="OpenPGP encrypted message")
    pgp_msg_part2.add_header(_name="Content-Disposition", _value="inline", filename="encrypted.asc")
    pgp_msg_part2.set_payload(get_gpg_cipher_text(msg.as_string(), email_address_recipient))

    pgp_msg.attach(pgp_msg_part1)
    pgp_msg.attach(pgp_msg_part2)

    return pgp_msg.as_string()