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40 lines
1.1 KiB
Python
Executable File
40 lines
1.1 KiB
Python
Executable File
#!/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 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
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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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with open("./private_key.pem", "br") as f:
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PRIVKEY = f.read()
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with open("./public_key.pem", "br") as f:
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PUBKEY = f.read()
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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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privkey: RSAPrivateKey = load_pem_private_key(PRIVKEY, None)
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signature = privkey.sign(data, PKCS1v15(), SHA1())
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b64sig = base64.b64encode(signature)
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print(b64sig)
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# Verify
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pubkey = load_pem_public_key(PUBKEY)
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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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print("Verify OK")
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except InvalidSignature as e:
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print("Verify failed")
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