mbedtls-server: Fix broken client verification #2902
Closed
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This fixes clients being able to connect with a certicate that was not signed by the configured CA when SSL_VERIFY_FAIL_IF_NO_PEER_CERT is set.
The issue only appeared when a client connects via IP address directly and not use a hostname.
When the hostname was used to connect, the SNI 'callback lws_mbedtls_sni_cb' overwrote the invalid verfiy mode of
MBEDTLS_SSL_VERIFY_OPTIONAL with MBEDTLS_SSL_VERIFY_REQUIRED by calling SSL_set_SSL_CTX.