python312Packages.pgpy: fix build (#368110)

  buildPythonPackage,

  setuptools,

  pyasn1,

  fetchpatch,

  cryptography,

  pytestCheckHook,

}:

  disabled = pythonOlder "3.6";

  format = "pyproject";

  pyproject = true;

  src = fetchFromGitHub {

    owner = "SecurityInnovation";

    hash = "sha256-47YiHNxmjyCOYHHUV3Zyhs3Att9HZtCXYfbN34ooTxU=";

  };

  nativeBuildInputs = [ setuptools ];

  build-system = [ setuptools ];

  propagatedBuildInputs = [

  dependencies = [

    pyasn1

    cryptography

  ];

  patches = [

    # https://github.com/SecurityInnovation/PGPy/issues/462

    ./pr-443.patch

  ];

  postPatch = ''

    # https://github.com/SecurityInnovation/PGPy/issues/472

    substituteInPlace tests/test_10_exceptions.py \

      --replace-fail ", 512" ", 1024" # We need longer test key because pgp deprecated length=512

  '';

  nativeCheckInputs = [ pytestCheckHook ];

  meta = with lib; {

  meta = {

    homepage = "https://github.com/SecurityInnovation/PGPy";

    description = "Pretty Good Privacy for Python";

    longDescription = ''

      PGPy is a Python library for implementing Pretty Good Privacy into Python

      programs, conforming to the OpenPGP specification per RFC 4880.

    '';

    license = licenses.bsd3;

    maintainers = with maintainers; [

    license = lib.licenses.bsd3;

    maintainers = with lib.maintainers; [

      eadwu

      dotlambda

    ];

From 221a1f15a42f3ef76ccafcddf66b7c4ade391bff Mon Sep 17 00:00:00 2001

From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>

Date: Sat, 11 Feb 2023 12:17:00 -0500

Subject: [PATCH] drop use of imghdr

imghdr is deprecated and will be removed in python 3.13 (see https://peps.python.org/pep-0594/#imghdr)

The relevant code in imghdr is just:

```

def test_jpeg(h, f):

    """JPEG data with JFIF or Exif markers; and raw JPEG"""

    if h[6:10] in (b'JFIF', b'Exif'):

        return 'jpeg'

    elif h[:4] == b'\xff\xd8\xff\xdb':

        return 'jpeg'

```

So we transplant it directly

---

 pgpy/constants.py | 4 +---

 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/pgpy/constants.py b/pgpy/constants.py

index 28a4561a..983916d4 100644

--- a/pgpy/constants.py

+++ b/pgpy/constants.py

@@ -2,7 +2,6 @@

 """

 import bz2

 import hashlib

-import imghdr

 import os

 import zlib

 import warnings

@@ -429,8 +428,7 @@ class ImageEncoding(IntEnum):

     @classmethod

     def encodingof(cls, imagebytes):

-        type = imghdr.what(None, h=imagebytes)

-        if type == 'jpeg':

+        if imagebytes[6:10] in (b'JFIF', b'Exif') or imagebytes[:4] == b'\xff\xd8\xff\xdb':

             return ImageEncoding.JPEG

         return ImageEncoding.Unknown  # pragma: no cover