113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef TLS_H
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#define TLS_H
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#include "nghttp2_config.h"
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#include <cinttypes>
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#include <openssl/ssl.h>
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#include "ssl_compat.h"
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namespace nghttp2 {
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namespace tls {
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// Acquire OpenSSL global lock to share SSL_CTX across multiple
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// threads. The constructor acquires lock and destructor unlocks.
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class LibsslGlobalLock {
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public:
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LibsslGlobalLock();
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LibsslGlobalLock(const LibsslGlobalLock &) = delete;
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LibsslGlobalLock &operator=(const LibsslGlobalLock &) = delete;
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};
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// Recommended general purpose "Modern compatibility" cipher suites by
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// mozilla.
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//
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// https://wiki.mozilla.org/Security/Server_Side_TLS
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constexpr char DEFAULT_CIPHER_LIST[] =
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"ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-"
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"CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-"
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"SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-"
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"AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256";
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constexpr char DEFAULT_TLS13_CIPHER_LIST[] =
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#if OPENSSL_1_1_1_API
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TLS_DEFAULT_CIPHERSUITES
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#else // !OPENSSL_1_1_1_API
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""
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#endif // !OPENSSL_1_1_1_API
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;
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constexpr auto NGHTTP2_TLS_MIN_VERSION = TLS1_VERSION;
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#ifdef TLS1_3_VERSION
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constexpr auto NGHTTP2_TLS_MAX_VERSION = TLS1_3_VERSION;
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#else // !TLS1_3_VERSION
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constexpr auto NGHTTP2_TLS_MAX_VERSION = TLS1_2_VERSION;
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#endif // !TLS1_3_VERSION
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const char *get_tls_protocol(SSL *ssl);
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struct TLSSessionInfo {
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const char *cipher;
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const char *protocol;
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const uint8_t *session_id;
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bool session_reused;
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size_t session_id_length;
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};
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TLSSessionInfo *get_tls_session_info(TLSSessionInfo *tls_info, SSL *ssl);
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// Returns true iff the negotiated protocol is TLSv1.2.
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bool check_http2_tls_version(SSL *ssl);
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// Returns true iff the negotiated cipher suite is in HTTP/2 cipher
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// block list.
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bool check_http2_cipher_block_list(SSL *ssl);
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// Returns true if SSL/TLS requirement for HTTP/2 is fulfilled.
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// To fulfill the requirement, the following 2 terms must be hold:
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//
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// 1. The negotiated protocol must be TLSv1.2.
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// 2. The negotiated cipher cuite is not listed in the block list
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// described in RFC 7540.
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bool check_http2_requirement(SSL *ssl);
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// Initializes OpenSSL library
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void libssl_init();
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// Sets TLS min and max versions to |ssl_ctx|. This function returns
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// 0 if it succeeds, or -1.
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int ssl_ctx_set_proto_versions(SSL_CTX *ssl_ctx, int min, int max);
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} // namespace tls
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} // namespace nghttp2
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#endif // TLS_H
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