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#!/usr/bin/python
import struct
import spnego
import spnego.iov
def exchange_data(data: bytes) -> bytes:
# Insert code to send to acceptor and receive token
return b""
def main() -> None:
client = spnego.client("username", "password", hostname="server")
in_token = None
while client.complete:
out_token = client.step(in_token)
if not out_token:
break
in_token = exchange_data(out_token)
print("Negotiated protocol: %s" % client.negotiated_protocol)
enc_result = client.wrap_iov(
[
spnego.iov.BufferType.header,
b"my secret",
spnego.iov.BufferType.padding,
]
)
header = enc_result.buffers[0].data or b""
enc_data = enc_result.buffers[1].data or b""
padding = enc_result.buffers[2].data or b""
enc_payload = struct.pack("<I", len(header)) + header + enc_data + padding
resp = exchange_data(enc_payload)
header_len = struct.unpack("<I", resp[:4])[0]
header = resp[4 : 4 + header_len]
enc_data = resp[4 + header_len :]
dec_result = client.unwrap_iov(
[
spnego.iov.IOVBuffer(spnego.iov.BufferType.header, header),
enc_data,
]
)
dec_data = dec_result.buffers[1].data or b""
print("Server response: %s" % dec_data.decode("utf-8"))
if __name__ == "__main__":
main()
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