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https://github.com/micropython/micropython.git
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f01373587d
Previously, mpycert.der was the Intermediate certificate which is regularly re-issued by Letsencrypt. Also changes ssl_cert.py to load the cert data from the same file as test_sslcontext_client.py, so the DER string doesn't have to be pasted into the source. This work was funded through GitHub Sponsors. Signed-off-by: Angus Gratton <angus@redyak.com.au>
43 lines
1.4 KiB
Python
43 lines
1.4 KiB
Python
import os
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import socket
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import ssl
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if not hasattr(ssl, "CERT_REQUIRED"):
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print("SKIP")
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raise SystemExit
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# This ISRG Root X1 certificate was downloaded from https://letsencrypt.org/certificates/#root-cas
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# This cert is used to sign the intermediate cert in use by micropython.org
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# To check the current intermediate cert, can run:
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# $ openssl s_client -showcerts -connect micropython.org:443 </dev/null 2>/dev/null
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root_cert_path = "isrgrootx1.der"
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def main(use_stream=True):
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context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
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context.verify_mode = ssl.CERT_REQUIRED
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assert context.verify_mode == ssl.CERT_REQUIRED
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context.load_verify_locations(cafile=root_cert_path)
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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addr = socket.getaddrinfo("micropython.org", 443)[0][-1]
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# CPython can wrap the socket even if not connected yet.
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# ssl_sock = context.wrap_socket(s, server_hostname='micropython.org')
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# ssl_sock.connect(addr)
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# MicroPython needs to connect first, CPython can do this too.
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s.connect(addr)
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# server_hostname must match CN (Common Name) in the certificate
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# presented by the server
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ssl_sock = context.wrap_socket(s, server_hostname="micropython.org")
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ssl_sock.write(b"GET / HTTP/1.0\r\n\r\n")
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print(ssl_sock.read(17))
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assert isinstance(ssl_sock.cipher(), tuple)
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ssl_sock.close()
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main()
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