vespalib/src/vespa/vespalib/net/tls/impl/openssl_tls_context_impl.h


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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once

#include <vespa/vespalib/crypto/openssl_typedefs.h>
#include <vespa/vespalib/net/socket_address.h>
#include <vespa/vespalib/net/tls/tls_context.h>
#include <vespa/vespalib/net/tls/transport_security_options.h>
#include <vespa/vespalib/net/tls/certificate_verification_callback.h>
#include <vespa/vespalib/stllike/string.h>

#include <chrono>

namespace vespalib::net::tls::impl {

class OpenSslCryptoCodecImpl;

class OpenSslTlsContextImpl : public TlsContext {
    crypto::SslCtxPtr _ctx;
    AuthorizationMode _authorization_mode;
    std::shared_ptr<CertificateVerificationCallback> _cert_verify_callback;
    TransportSecurityOptions _redacted_transport_options;
public:
    OpenSslTlsContextImpl(const TransportSecurityOptions& ts_opts,
                          std::shared_ptr<CertificateVerificationCallback> cert_verify_callback,
                          AuthorizationMode authz_mode);
    ~OpenSslTlsContextImpl() override;

    ::SSL_CTX* native_context() const noexcept { return _ctx.get(); }
    const TransportSecurityOptions& transport_security_options() const noexcept override {
        return _redacted_transport_options;
    }
    AuthorizationMode authorization_mode() const noexcept override { return _authorization_mode; }
private:
    // Note: single use per instance; does _not_ clear existing chain!
    void add_certificate_authorities(stringref ca_pem);
    void add_certificate_chain(stringref chain_pem);
    void use_private_key(stringref key_pem);
    void verify_private_key();
    // Enable use of ephemeral key exchange (ECDHE), allowing forward secrecy.
    void enable_ephemeral_key_exchange();
    void disable_compression();
    // Explicitly disable TLS renegotiation for <= TLSv1.2 on OpenSSL versions
    // that support this. We don't support renegotiation in general (and will break
    // the connection if it's attempted by the peer), but this should signal
    // explicitly to the peer that it's not a supported action.
    void disable_renegotiation();
    void disable_session_resumption();
    void enforce_peer_certificate_verification();
    void set_ssl_ctx_self_reference();
    void set_accepted_cipher_suites(const std::vector<vespalib::string>& ciphers);

    bool verify_trusted_certificate(::X509_STORE_CTX* store_ctx, OpenSslCryptoCodecImpl& codec_impl);

    static int verify_cb_wrapper(int preverified_ok, ::X509_STORE_CTX* store_ctx);
};

}