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@@ -0,0 +1,11 @@
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+from asn1crypto import pem, x509
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+
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+
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+with open('/etc/ssl/certs/ISRG_Root_X2.pem', 'rb') as f:
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+ der_bytes = f.read()
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+ if pem.detect(der_bytes):
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+ type_name, headers, der_bytes = pem.unarmor(der_bytes)
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+
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+cert = x509.Certificate.load(der_bytes)
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+
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+assert cert.subject.native["common_name"] == "ISRG Root X2"
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