2023-06-20 13:26:14 +02:00
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== How to fix it in OpenSSL
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=== Code examples
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include::../../common/fix/code-rationale.adoc[]
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Certificate validation is not enabled by default and has to be explicitly
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enabled through `set_verify`.
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==== Noncompliant code example
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[source,python,diff-id=1,diff-type=noncompliant]
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----
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from OpenSSL import SSL
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ctx1 = SSL.Context(SSL.TLSv1_2_METHOD) # Noncompliant
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ctx2 = SSL.Context(SSL.TLSv1_2_METHOD)
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ctx2.set_verify(SSL.VERIFY_NONE, verify_callback) # Noncompliant
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----
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==== Compliant solution
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2023-08-21 15:22:49 +02:00
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[source,python,diff-id=1,diff-type=compliant]
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2023-06-20 13:26:14 +02:00
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----
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from OpenSSL import SSL
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ctx = SSL.Context(SSL.TLSv1_2_METHOD)
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ctx.set_verify(SSL.VERIFY_PEER, verify_callback)
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ctx.set_verify(SSL.VERIFY_PEER | SSL.VERIFY_FAIL_IF_NO_PEER_CERT, verify_callback)
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ctx.set_verify(SSL.VERIFY_PEER | SSL.VERIFY_FAIL_IF_NO_PEER_CERT | SSL.VERIFY_CLIENT_ONCE, verify_callback)
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----
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=== How does this work?
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include::../../common/fix/validation.adoc[]
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