nghttp2/src/shrpx_ssl.h

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/*
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* nghttp2 - HTTP/2 C Library
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*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef SHRPX_SSL_H
#define SHRPX_SSL_H
#include "shrpx.h"
#include <vector>
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#include <openssl/ssl.h>
#include <openssl/err.h>
#include <ev.h>
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namespace shrpx {
class ClientHandler;
struct WorkerStat;
class DownstreamConnectionPool;
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namespace ssl {
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SSL_CTX *create_ssl_context(const char *private_key_file,
const char *cert_file);
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SSL_CTX *create_ssl_client_context();
ClientHandler *accept_connection(struct ev_loop *loop, SSL_CTX *ssl_ctx, int fd,
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sockaddr *addr, int addrlen,
WorkerStat *worker_stat,
DownstreamConnectionPool *dconn_pool);
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// Check peer's certificate against first downstream address in
// Config::downstream_addrs. We only consider first downstream since
// we use this function for HTTP/2 downstream link only.
int check_cert(SSL *ssl);
// Retrieves DNS and IP address in subjectAltNames and commonName from
// the |cert|.
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void get_altnames(X509 *cert, std::vector<std::string> &dns_names,
std::vector<std::string> &ip_addrs, std::string &common_name);
// CertLookupTree forms lookup tree to get SSL_CTX whose DNS or
// commonName matches hostname in query. The tree is patricia trie
// data structure formed from the tail of the hostname pattern. Each
// CertNode contains part of hostname str member in range [first,
// last) member and the next member contains the following CertNode
// pointers ('following' means character before the current one). The
// CertNode where a hostname pattern ends contains its SSL_CTX pointer
// in the ssl_ctx member. For wildcard hostname pattern, we store the
// its pattern and SSL_CTX in CertNode one before first "*" found from
// the tail.
//
// When querying SSL_CTX with particular hostname, we match from its
// tail in our lookup tree. If the query goes to the first character
// of the hostname and current CertNode has non-NULL ssl_ctx member,
// then it is the exact match. The ssl_ctx member is returned. Along
// the way, if CertNode which contains non-empty wildcard_certs member
// is encountered, wildcard hostname matching is performed against
// them. If there is a match, its SSL_CTX is returned. If none
// matches, query is continued to the next character.
struct CertNode {
// SSL_CTX for exact match
SSL_CTX *ssl_ctx;
// list of wildcard domain name and its SSL_CTX pair, the wildcard
// '*' appears in this position.
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std::vector<std::pair<char *, SSL_CTX *>> wildcard_certs;
// Next CertNode index of CertLookupTree::nodes
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std::vector<CertNode *> next;
char *str;
// [first, last) in the reverse direction in str, first >=
// last. This indices only work for str member.
int first, last;
};
struct CertLookupTree {
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std::vector<SSL_CTX *> certs;
std::vector<char *> hosts;
CertNode *root;
};
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CertLookupTree *cert_lookup_tree_new();
void cert_lookup_tree_del(CertLookupTree *lt);
// Adds |ssl_ctx| with hostname pattern |hostname| with length |len|
// to the lookup tree |lt|. The |hostname| must be NULL-terminated.
void cert_lookup_tree_add_cert(CertLookupTree *lt, SSL_CTX *ssl_ctx,
const char *hostname, size_t len);
// Looks up SSL_CTX using the given |hostname| with length |len|. If
// more than one SSL_CTX which matches the query, it is undefined
// which one is returned. The |hostname| must be NULL-terminated. If
// no matching SSL_CTX found, returns NULL.
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SSL_CTX *cert_lookup_tree_lookup(CertLookupTree *lt, const char *hostname,
size_t len);
// Adds |ssl_ctx| to lookup tree |lt| using hostnames read from
// |certfile|. The subjectAltNames and commonName are considered as
// eligible hostname. This function returns 0 if it succeeds, or -1.
// Even if no ssl_ctx is added to tree, this function returns 0.
int cert_lookup_tree_add_cert_from_file(CertLookupTree *lt, SSL_CTX *ssl_ctx,
const char *certfile);
// Returns true if |needle| which has |len| bytes is included in the
// protocol list |protos|.
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bool in_proto_list(const std::vector<char *> &protos,
const unsigned char *needle, size_t len);
// Returns true if security requirement for HTTP/2 is fulfilled.
bool check_http2_requirement(SSL *ssl);
// Returns SSL/TLS option mask to disable SSL/TLS protocol version not
// included in |tls_proto_list|. The returned mask can be directly
// passed to SSL_CTX_set_options().
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long int create_tls_proto_mask(const std::vector<char *> &tls_proto_list);
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std::vector<unsigned char> set_alpn_prefs(const std::vector<char *> &protos);
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} // namespace ssl
} // namespace shrpx
#endif // SHRPX_SSL_H