SSL_CTX_USE_SERVERINFO(3ssl) OpenSSL SSL_CTX_USE_SERVERINFO(3ssl) SSL_CTX_use_serverinfo_ex, SSL_CTX_use_serverinfo, SSL_CTX_use_serverinfo_file - serverinfo #include int SSL_CTX_use_serverinfo_ex(SSL_CTX *ctx, unsigned int version, const unsigned char *serverinfo, size_t serverinfo_length); int SSL_CTX_use_serverinfo(SSL_CTX *ctx, const unsigned char *serverinfo, size_t serverinfo_length); int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file); TLS "serverinfo" SSL_CTX. "serverinfo" ClientHello . SSL_CTX_use_serverinfo_ex() serverinfo ctx. version *serverinfo serverinfo_length. version SSL_SERVERINFOV2 4 2 2 extension_data . SSL_CTX_add_custom_ext(3). serverinfo Certificate ( ). version SSL_SERVERINFOV1 2 2 extension_data . SSL_CTX_add_custom_ext(3). : SSL_EXT_TLS1_2_AND_BELOW_ONLY | SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO | SSL_EXT_IGNORE_ON_RESUMPTION SSL_CTX_use_serverinfo() SSL_CTX_use_serverinfo_ex() version SSL_SERVERINFOV1 . SSL_CTX_use_serverinfo_file() serverinfo file ctx. PEM. SSL_CTX_use_serverinfo_ex(). PEM "BEGIN SERVERINFOV2 FOR " SSL_SERVERINFOV2 "BEGIN SERVERINFO FOR " SSL_SERVERINFOV1. (RSA/DSA) SSL_CTX_use_certificate() serverinfo . RSA serverinfo . serverinfo SSL_CTX_use_serverinfo() SSL_CTX_use_certificate(). 1. 0. . ssl(7) 2013-2017 OpenSSL. . Apache 2.0 ( ""). . LICENSE . 3 . . : . 3.6.2 7 2026 SSL_CTX_USE_SERVERINFO(3ssl)