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Published 20 hours ago • verified publisher icon secdev

In TLSClientKeyExchange elliptic curve exchange keys include the length byte

Open wasmachensachen98 opened this issue 8 months ago • 2 comments

Brief description

When defining an TLSClientKeyExchange object in the exchangekeys field the length byte is included, although its named "exchkeys"

Scapy version

2.6.0rc1

Python version

3.10.12

Operating system

Ubuntu 22.04.2 LTS

Additional environment information

No response

How to reproduce

clientkeyexchange_bytes = bytes.fromhex(
"100000424104b7378d5a30c8e2e24e58b9b43fae9ec7eae275b04e4e98e6607d937870e375b56f4053e412f5f1d26e9a04c2ffe1821bfbf9ac0b590cc3a337238fb45bd53c0d"
)
tls_client_key_exchange = TLSClientKeyExchange(clientkeyexchange_bytes)
print(tls_client_key_exchange.exchkeys.load.hex())

Actual result

4104b7378d5a30c8e2e24e58b9b43fae9ec7eae275b04e4e98e6607d937870e375b56f4053e412f5f1d26e9a04c2ffe1821bfbf9ac0b590cc3a337238fb45bd53c0d

Expected result

04b7378d5a30c8e2e24e58b9b43fae9ec7eae275b04e4e98e6607d937870e375b56f4053e412f5f1d26e9a04c2ffe1821bfbf9ac0b590cc3a337238fb45bd53c0d The first byte differs

Related resources

No response

wasmachensachen98 avatar Jun 12 '24 08:06 wasmachensachen98