circuitpython/tests/extmod/ussl_basic.py

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# very basic test of ssl module, just to test the methods exist
try:
import uio as io
import ussl as ssl
except ImportError:
print("SKIP")
raise SystemExit
# create in client mode
try:
ss = ssl.wrap_socket(io.BytesIO(), server_hostname="test.example.com")
except OSError as er:
print("wrap_socket:", repr(er))
# create in server mode (can use this object for further tests)
socket = io.BytesIO()
ss = ssl.wrap_socket(socket, server_side=1)
# print
print(repr(ss)[:12])
# setblocking() propagates call to the underlying stream object, and
# io.BytesIO doesn't have setblocking() (in CPython too).
# try:
# ss.setblocking(False)
# except NotImplementedError:
# print('setblocking: NotImplementedError')
# ss.setblocking(True)
# write
print(ss.write(b"aaaa"))
# read (underlying socket has no data)
print(ss.read(8))
# read (underlying socket has data, but it's bad data)
socket.write(b"aaaaaaaaaaaaaaaa")
socket.seek(0)
try:
ss.read(8)
except OSError as er:
print("read:", repr(er))
# close
ss.close()
# close 2nd time
ss.close()
# read on closed socket
try:
ss.read(10)
except OSError as er:
print("read:", repr(er))
# write on closed socket
try:
ss.write(b"aaaa")
except OSError as er:
print("write:", repr(er))