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42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
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#!/usr/bin/env python3
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#
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# Skia < skia AT libskia DOT so >
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#
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# Beerware licensed software - 2017
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#
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import base64
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from pathlib import Path
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import pytest
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from cryptography.exceptions import InvalidSignature
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from cryptography.hazmat.primitives.asymmetric.padding import PKCS1v15
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from cryptography.hazmat.primitives.asymmetric.rsa import RSAPrivateKey, RSAPublicKey
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from cryptography.hazmat.primitives.hashes import SHA1
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from cryptography.hazmat.primitives.serialization import (
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load_pem_private_key,
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load_pem_public_key,
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)
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from django.conf import settings
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def test_signature_valid():
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"""Test that data sent to the bank is correctly signed."""
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data = "Amount=400&BasketID=4000&Auto=42&Error=00000\n".encode("utf-8")
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# Sign
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key_dir = Path(settings.BASE_DIR) / "eboutic" / "tests"
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privkey: RSAPrivateKey = load_pem_private_key(
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(key_dir / "private_key.pem").read_bytes(), None
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)
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pubkey: RSAPublicKey = load_pem_public_key(
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(key_dir / "public_key.pem").read_bytes()
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)
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signature = privkey.sign(data, PKCS1v15(), SHA1())
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b64sig = base64.b64encode(signature)
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signature = base64.b64decode(b64sig)
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try:
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pubkey.verify(signature, data, PKCS1v15(), SHA1())
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except InvalidSignature:
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pytest.fail("Failed to validate signature")
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