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lib: TLS session ticket caching reworked

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Described in detail in internal doc TLS-SESSIONS.md

Main points:
- use a new `ssl_peer_key` for cache lookups by connection filters
- recognize differences between TLSv1.3 and other tickets
  * TLSv1.3 tickets are single-use, cache can hold several of them for a peer
  * TLSv1.2 are reused, keep only a single one per peer
- differentiate between ticket BLOB to store (that could be persisted) and object instances
- use put/take/return pattern for cache access
- remember TLS version, ALPN protocol, time received and lifetime of ticket
- auto-expire tickets after their lifetime

Closes #15774
This commit is contained in:
Stefan Eissing 2024-12-18 13:22:35 +01:00 • committed by Daniel Stenberg
parent e5e2e09a75
commit fa0ccd9f1f
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36 changed files with 1784 additions and 780 deletions
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10
lib/setopt.c
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@ -1588,8 +1588,8 @@ static CURLcode setopt_pointers(struct Curl_easy *data, CURLoption option,
data->hsts = NULL;
#endif
#ifdef USE_SSL
if(data->share->sslsession == data->state.session)
data->state.session = NULL;
if(data->share->ssl_scache == data->state.ssl_scache)
data->state.ssl_scache = NULL;
#endif
#ifdef USE_LIBPSL
if(data->psl == &data->share->psl)
@ -1632,10 +1632,8 @@ static CURLcode setopt_pointers(struct Curl_easy *data, CURLoption option,
}
#endif
#ifdef USE_SSL
if(data->share->sslsession) {
data->set.general_ssl.max_ssl_sessions = data->share->max_ssl_sessions;
data->state.session = data->share->sslsession;
}
if(data->share->ssl_scache)
data->state.ssl_scache = data->share->ssl_scache;
#endif
#ifdef USE_LIBPSL
if(data->share->specifier & (1 << CURL_LOCK_DATA_PSL))