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/*-------------------------------------------------------------------------
*
* openssl.h
* OpenSSL supporting functionality shared between frontend and backend
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* src/include/common/openssl.h
*
*-------------------------------------------------------------------------
*/
#ifndef COMMON_OPENSSL_H
#define COMMON_OPENSSL_H
#ifdef USE_OPENSSL
#include <openssl/ssl.h>
/*
* OpenSSL doesn't provide any very nice way to identify the min/max
* protocol versions the library supports, so we fake it as best we can.
* Note in particular that this doesn't account for restrictions that
* might be specified in the installation's openssl.cnf.
*
* We disable SSLv3 and older in library setup, so TLSv1 is the oldest
* protocol version of interest.
*/
#define MIN_OPENSSL_TLS_VERSION "TLSv1"
#if defined(TLS1_3_VERSION)
#define MAX_OPENSSL_TLS_VERSION "TLSv1.3"
#elif defined(TLS1_2_VERSION)
#define MAX_OPENSSL_TLS_VERSION "TLSv1.2"
#elif defined(TLS1_1_VERSION)
#define MAX_OPENSSL_TLS_VERSION "TLSv1.1"
#else
#define MAX_OPENSSL_TLS_VERSION "TLSv1"
#endif
/* src/common/protocol_openssl.c */
#ifndef SSL_CTX_set_min_proto_version
extern int SSL_CTX_set_min_proto_version(SSL_CTX *ctx, int version);
extern int SSL_CTX_set_max_proto_version(SSL_CTX *ctx, int version);
#endif
#endif /* USE_OPENSSL */
#endif /* COMMON_OPENSSL_H */
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