SSL object cache #140
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SSL object cache #140
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Instead of cross-linking the objects using exdata, pointers to configured certificates are now stored in ngx_ssl_t, and OCSP staples are now accessed with rbtree in it. This allows sharing these objects between SSL contexts. Based on previous work by Mini Hawthorne.
bavshin-f5
approved these changes
Sep 25, 2024
arut
reviewed
Sep 28, 2024
arut
reviewed
Sep 28, 2024
arut
reviewed
Sep 28, 2024
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bavshin-f5
reviewed
Sep 30, 2024
Added ngx_openssl_cache_module, which indexes a type-aware object cache. It maps an id to a unique instance, and provides references to it, which are dropped when the cycle's pool is destroyed. The cache will be used in subsequent patches. Based on previous work by Mini Hawthorne.
Certificate chains are now loaded once. The certificate cache provides each chain as a unique stack of reference counted elements. This shallow copy is required because OpenSSL stacks aren't reference counted. Based on previous work by Mini Hawthorne.
EVP_KEY objects are a reference-counted container for key material, shallow copies and OpenSSL stack management aren't needed as with certificates. Based on previous work by Mini Hawthorne.
Based on previous work by Mini Hawthorne.
bavshin-f5
approved these changes
Sep 30, 2024
This can potentially provide a large amount of savings, because CA certificates can be quite large. Based on previous work by Mini Hawthorne.
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Proposed changes
WIP as obtained from https://mailman.nginx.org/pipermail/nginx-devel/2024-August/IKMUSKO6KA3UCDEJTXKDPZZZOEZ3THSO.html
The series adds object caching of statically specified certificates, certificate keys, CRLs, and CA ceritficates.