MAJOR: threads/ssl: Make SSL part thread-safe
First, OpenSSL is now initialized to be thread-safe. This is done by setting 2
callbacks. The first one is ssl_locking_function. It handles the locks and
unlocks. The second one is ssl_id_function. It returns the current thread
id. During the init step, we create as much as R/W locks as needed, ie the
number returned by CRYPTO_num_locks function.
Next, The reusable SSL session in the server context is now thread-local.
Shctx is now also initialized if HAProxy is started with several threads.
And finally, a global lock has been added to protect the LRU cache used to store
generated certificates. The function ssl_sock_get_generated_cert is now
deprecated because the retrieved certificate can be removed by another threads
in same time. Instead, a new function has been added,
ssl_sock_assign_generated_cert. It must be used to search a certificate in the
cache and set it immediatly if found.
diff --git a/include/proto/ssl_sock.h b/include/proto/ssl_sock.h
index 8f8d277..ce76849 100644
--- a/include/proto/ssl_sock.h
+++ b/include/proto/ssl_sock.h
@@ -72,6 +72,7 @@
void ssl_free_engines(void);
SSL_CTX *ssl_sock_create_cert(struct connection *conn, const char *servername, unsigned int key);
+SSL_CTX *ssl_sock_assign_generated_cert(unsigned int key, struct bind_conf *bind_conf, SSL *ssl);
SSL_CTX *ssl_sock_get_generated_cert(unsigned int key, struct bind_conf *bind_conf);
int ssl_sock_set_generated_cert(SSL_CTX *ctx, unsigned int key, struct bind_conf *bind_conf);
unsigned int ssl_sock_generated_cert_key(const void *data, size_t len);