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/* $OpenBSD: tls_internal.h,v 1.57 2017/04/10 17:11:13 jsing Exp $ */
/*
* Copyright (c) 2014 Jeremie Courreges-Anglas <jca@openbsd.org>
* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef HEADER_TLS_INTERNAL_H
#define HEADER_TLS_INTERNAL_H
#include <arpa/inet.h>
#include <netinet/in.h>
#include <openssl/ssl.h>
__BEGIN_HIDDEN_DECLS
#define _PATH_SSL_CA_FILE "/etc/ssl/cert.pem"
#define TLS_CIPHERS_DEFAULT "TLSv1.2+AEAD+ECDHE:TLSv1.2+AEAD+DHE"
#define TLS_CIPHERS_COMPAT "HIGH:!aNULL"
#define TLS_CIPHERS_LEGACY "HIGH:MEDIUM:!aNULL"
#define TLS_CIPHERS_ALL "ALL:!aNULL:!eNULL"
union tls_addr {
struct in_addr ip4;
struct in6_addr ip6;
};
struct tls_error {
char *msg;
int num;
int tls;
};
struct tls_keypair {
struct tls_keypair *next;
char *cert_mem;
size_t cert_len;
char *key_mem;
size_t key_len;
char *ocsp_staple;
size_t ocsp_staple_len;
char *cert_hash;
};
#define TLS_MIN_SESSION_TIMEOUT (4)
#define TLS_MAX_SESSION_TIMEOUT (24 * 60 * 60)
#define TLS_NUM_TICKETS 4
#define TLS_TICKET_NAME_SIZE 16
#define TLS_TICKET_AES_SIZE 32
#define TLS_TICKET_HMAC_SIZE 16
struct tls_ticket_key {
/* The key_name must be 16 bytes according to -lssl */
unsigned char key_name[TLS_TICKET_NAME_SIZE];
unsigned char aes_key[TLS_TICKET_AES_SIZE];
unsigned char hmac_key[TLS_TICKET_HMAC_SIZE];
time_t time;
};
struct tls_config {
struct tls_error error;
char *alpn;
size_t alpn_len;
const char *ca_path;
char *ca_mem;
size_t ca_len;
const char *ciphers;
int ciphers_server;
int dheparams;
int ecdhecurve;
struct tls_keypair *keypair;
int ocsp_require_stapling;
uint32_t protocols;
unsigned char session_id[TLS_MAX_SESSION_ID_LENGTH];
int session_lifetime;
struct tls_ticket_key ticket_keys[TLS_NUM_TICKETS];
uint32_t ticket_keyrev;
int ticket_autorekey;
int verify_cert;
int verify_client;
int verify_depth;
int verify_name;
int verify_time;
int skip_private_key_check;
};
struct tls_conninfo {
char *alpn;
char *cipher;
char *servername;
char *version;
char *hash;
char *issuer;
char *subject;
uint8_t *peer_cert;
size_t peer_cert_len;
time_t notbefore;
time_t notafter;
};
#define TLS_CLIENT (1 << 0)
#define TLS_SERVER (1 << 1)
#define TLS_SERVER_CONN (1 << 2)
#define TLS_EOF_NO_CLOSE_NOTIFY (1 << 0)
#define TLS_HANDSHAKE_COMPLETE (1 << 1)
#define TLS_SSL_NEEDS_SHUTDOWN (1 << 2)
struct tls_ocsp_result {
const char *result_msg;
int response_status;
int cert_status;
int crl_reason;
time_t this_update;
time_t next_update;
time_t revocation_time;
};
struct tls_ocsp {
/* responder location */
char *ocsp_url;
/* cert data, this struct does not own these */
X509 *main_cert;
STACK_OF(X509) *extra_certs;
struct tls_ocsp_result *ocsp_result;
};
struct tls_sni_ctx {
struct tls_sni_ctx *next;
SSL_CTX *ssl_ctx;
X509 *ssl_cert;
};
struct tls {
struct tls_config *config;
struct tls_error error;
uint32_t flags;
uint32_t state;
char *servername;
int socket;
SSL *ssl_conn;
SSL_CTX *ssl_ctx;
struct tls_sni_ctx *sni_ctx;
X509 *ssl_peer_cert;
STACK_OF(X509) *ssl_peer_chain;
struct tls_conninfo *conninfo;
struct tls_ocsp *ocsp;
tls_read_cb read_cb;
tls_write_cb write_cb;
void *cb_arg;
};
struct tls_sni_ctx *tls_sni_ctx_new(void);
void tls_sni_ctx_free(struct tls_sni_ctx *sni_ctx);
struct tls *tls_new(void);
struct tls *tls_server_conn(struct tls *ctx);
int tls_check_name(struct tls *ctx, X509 *cert, const char *servername,
int *match);
int tls_configure_server(struct tls *ctx);
int tls_configure_ssl(struct tls *ctx, SSL_CTX *ssl_ctx);
int tls_configure_ssl_keypair(struct tls *ctx, SSL_CTX *ssl_ctx,
struct tls_keypair *keypair, int required);
int tls_configure_ssl_verify(struct tls *ctx, SSL_CTX *ssl_ctx, int verify);
int tls_handshake_client(struct tls *ctx);
int tls_handshake_server(struct tls *ctx);
int tls_config_load_file(struct tls_error *error, const char *filetype,
const char *filename, char **buf, size_t *len);
int tls_config_ticket_autorekey(struct tls_config *config);
int tls_host_port(const char *hostport, char **host, char **port);
int tls_set_cbs(struct tls *ctx,
tls_read_cb read_cb, tls_write_cb write_cb, void *cb_arg);
void tls_error_clear(struct tls_error *error);
int tls_error_set(struct tls_error *error, const char *fmt, ...)
__attribute__((__format__ (printf, 2, 3)))
__attribute__((__nonnull__ (2)));
int tls_error_setx(struct tls_error *error, const char *fmt, ...)
__attribute__((__format__ (printf, 2, 3)))
__attribute__((__nonnull__ (2)));
int tls_config_set_error(struct tls_config *cfg, const char *fmt, ...)
__attribute__((__format__ (printf, 2, 3)))
__attribute__((__nonnull__ (2)));
int tls_config_set_errorx(struct tls_config *cfg, const char *fmt, ...)
__attribute__((__format__ (printf, 2, 3)))
__attribute__((__nonnull__ (2)));
int tls_set_error(struct tls *ctx, const char *fmt, ...)
__attribute__((__format__ (printf, 2, 3)))
__attribute__((__nonnull__ (2)));
int tls_set_errorx(struct tls *ctx, const char *fmt, ...)
__attribute__((__format__ (printf, 2, 3)))
__attribute__((__nonnull__ (2)));
int tls_set_ssl_errorx(struct tls *ctx, const char *fmt, ...)
__attribute__((__format__ (printf, 2, 3)))
__attribute__((__nonnull__ (2)));
int tls_ssl_error(struct tls *ctx, SSL *ssl_conn, int ssl_ret,
const char *prefix);
int tls_conninfo_populate(struct tls *ctx);
void tls_conninfo_free(struct tls_conninfo *conninfo);
int tls_ocsp_verify_cb(SSL *ssl, void *arg);
int tls_ocsp_stapling_cb(SSL *ssl, void *arg);
void tls_ocsp_free(struct tls_ocsp *ctx);
struct tls_ocsp *tls_ocsp_setup_from_peer(struct tls *ctx);
int tls_hex_string(const unsigned char *_in, size_t _inlen, char **_out,
size_t *_outlen);
int tls_cert_hash(X509 *_cert, char **_hash);
void tls_config_skip_private_key_check(struct tls_config *config);
__END_HIDDEN_DECLS
#endif /* HEADER_TLS_INTERNAL_H */
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