commit 7485a8e823a2e82f4e545a17173aa971281a6c5d
Author: benton <bentonedmondson@gmail.com>
Date:   Sun Jul 18 19:29:12 2021 -0500

    the script is working correctly, still need to add logins

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e2f5dd2
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+result
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diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..2d09941
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,97 @@
+{
+  "nodes": {
+    "inept-epub": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1626630204,
+        "narHash": "sha256-R56r2p7z1bNJS0ng+KeuV4zbWT4T46zc6YDqySB7jQc=",
+        "owner": "BentonEdmondson",
+        "repo": "inept-epub",
+        "rev": "45306cadf7fd7a04453a60b8c1e39bc06b0035ec",
+        "type": "github"
+      },
+      "original": {
+        "owner": "BentonEdmondson",
+        "repo": "inept-epub",
+        "type": "github"
+      }
+    },
+    "libgourou-utils": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1626630231,
+        "narHash": "sha256-nuhlaSwdTVZl3mHA3Pw8pdbr8bxBmRuNAEwNh/IU/NE=",
+        "owner": "BentonEdmondson",
+        "repo": "libgourou-utils",
+        "rev": "07637d6aab51fc1e188576fefcf9a7b6d77f6fc6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "BentonEdmondson",
+        "repo": "libgourou-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1626464457,
+        "narHash": "sha256-u2PCh/+8vQSLwf0mPpKHKQ8hAPB3l4uNZR3r0TdK2Lg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c6c4a3d45ab200f17805d2d86a1ff1cc7ca2b186",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1626464457,
+        "narHash": "sha256-u2PCh/+8vQSLwf0mPpKHKQ8hAPB3l4uNZR3r0TdK2Lg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c6c4a3d45ab200f17805d2d86a1ff1cc7ca2b186",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1626464457,
+        "narHash": "sha256-u2PCh/+8vQSLwf0mPpKHKQ8hAPB3l4uNZR3r0TdK2Lg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c6c4a3d45ab200f17805d2d86a1ff1cc7ca2b186",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "inept-epub": "inept-epub",
+        "libgourou-utils": "libgourou-utils",
+        "nixpkgs": "nixpkgs_3"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..81838c2
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,26 @@
+{
+  inputs.nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable;
+  inputs.libgourou-utils.url = github:BentonEdmondson/libgourou-utils;
+  inputs.inept-epub.url = github:BentonEdmondson/inept-epub;
+
+  outputs = { self, ... }@flakes: let
+    nixpkgs = flakes.nixpkgs.legacyPackages.x86_64-linux;
+    libgourou-utils = flakes.libgourou-utils.defaultPackage.x86_64-linux;
+    inept-epub = flakes.inept-epub.defaultPackage.x86_64-linux;
+  in {
+    defaultPackage.x86_64-linux = nixpkgs.stdenv.mkDerivation {
+        pname = "knock";
+        version = "0.0.0";
+        src = self;
+        nativeBuildInputs = [ nixpkgs.makeWrapper ];
+        buildInputs = [ nixpkgs.python3 libgourou-utils inept-epub ];
+        installPhase = ''
+          mkdir -p $out/bin
+          chmod +x knock
+          cp knock $out/bin
+          wrapProgram $out/bin/knock --prefix PATH : ${nixpkgs.lib.makeBinPath [libgourou-utils inept-epub]}
+        '';
+      };
+
+  };
+}
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diff --git a/knock b/knock
new file mode 100644
index 0000000..e027248
--- /dev/null
+++ b/knock
@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+
+import os
+import argparse
+from pathlib import Path
+import subprocess
+
+parser = argparse.ArgumentParser(description='Convert an ACSM file to a DRM-free ePub file')
+parser.add_argument('acsm_file', metavar='file', type=str, help='the ACSM file to convert')
+args = parser.parse_args()
+
+# these are all Path objects: https://docs.python.org/3/library/pathlib.html
+args.acsm_file = Path(args.acsm_file).expanduser()
+args.drm_file = args.acsm_file.with_suffix('.drm.epub')
+args.epub_file = args.acsm_file.with_suffix('.epub')
+args.adobe_dir = Path('~/.config/knock').expanduser()
+args.activation_file = args.adobe_dir.joinpath('activation.xml')
+
+if not args.adobe_dir.exists():
+    raise Exception('This device is not registered')
+
+print('Downloading the ACSM file from Adobe...')
+
+subprocess.check_output([
+    'acsmdownloader',
+    '-d', str(args.adobe_dir.joinpath('device.xml')),
+    '-a', str(args.adobe_dir.joinpath('activation.xml')),
+    '-k', str(args.adobe_dir.joinpath('devicesalt')),
+    '-o', str(args.drm_file),
+    '-f', str(args.acsm_file)
+])
+
+print('Decrypting the file...')
+
+subprocess.check_output([
+    'inept-epub',
+    str(args.activation_file),
+    str(args.drm_file),
+    str(args.epub_file)
+])
+
+args.drm_file.unlink()
+
+print(f'\nThe DRM-free ePub file now exists at {str(args.epub_file)}!')
+print(f'Once you make sure the ePub file is readable, you can delete {str(args.acsm_file)}.')
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