ssl.h

	CRYPTO_EX_DATA ex_data;

	const EVP_MD *rsa_md5;/* For SSLv2 - name is 'ssl2-md5' */
	const EVP_MD *md5;	/* For SSLv3/TLSv1 'ssl3-md5' */
	const EVP_MD *sha1;   /* For SSLv3/TLSv1 'ssl3->sha1' */

	STACK_OF(X509) *extra_certs;
	STACK_OF(SSL_COMP) *comp_methods; /* stack of SSL_COMP, SSLv3/TLSv1 */


	/* Default values used when no per-SSL value is defined follow */

	void (*info_callback)(const SSL *ssl,int type,int val); /* used if SSL's info_callback is NULL */

	/* what we put in client cert requests */
	STACK_OF(X509_NAME) *client_CA;


	/* Default values to use in SSL structures follow (these are copied by SSL_new) */

	unsigned long options;
	unsigned long mode;
	long max_cert_list;

	struct cert_st /* CERT */ *cert;
	int read_ahead;

	/* callback that allows applications to peek at protocol messages */
	void (*msg_callback)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg);
	void *msg_callback_arg;

	int verify_mode;
	unsigned int sid_ctx_length;
	unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];
	int (*default_verify_callback)(int ok,X509_STORE_CTX *ctx); /* called 'verify_callback' in the SSL */

	/* Default generate session ID callback. */
	GEN_SESSION_CB generate_session_id;

	X509_VERIFY_PARAM *param;

#if 0
	int purpose;		/* Purpose setting */
	int trust;		/* Trust setting */
#endif

	int quiet_shutdown;

	/* Maximum amount of data to send in one fragment.
	 * actual record size can be more than this due to
	 * padding and MAC overheads.
	 */
	unsigned int max_send_fragment;

#ifndef OPENSSL_NO_ENGINE
	/* Engine to pass requests for client certs to
	 */
	ENGINE *client_cert_engine;
#endif

#ifndef OPENSSL_NO_TLSEXT
	/* TLS extensions servername callback */
	int (*tlsext_servername_callback)(SSL*, int *, void *);
	void *tlsext_servername_arg;
	/* RFC 4507 session ticket keys */
	unsigned char tlsext_tick_key_name[16];
	unsigned char tlsext_tick_hmac_key[16];
	unsigned char tlsext_tick_aes_key[16];
	/* Callback to support customisation of ticket key setting */
	int (*tlsext_ticket_key_cb)(SSL *ssl,
					unsigned char *name, unsigned char *iv,
					EVP_CIPHER_CTX *ectx,
 					HMAC_CTX *hctx, int enc);

	/* certificate status request info */
	/* Callback for status request */
	int (*tlsext_status_cb)(SSL *ssl, void *arg);
	void *tlsext_status_arg;

	/* draft-rescorla-tls-opaque-prf-input-00.txt information */
	int (*tlsext_opaque_prf_input_callback)(SSL *, void *peerinput, size_t len, void *arg);
	void *tlsext_opaque_prf_input_callback_arg;
#endif

#ifndef OPENSSL_NO_PSK
	char *psk_identity_hint;
	unsigned int (*psk_client_callback)(SSL *ssl, const char *hint, char *identity,
		unsigned int max_identity_len, unsigned char *psk,
		unsigned int max_psk_len);
	unsigned int (*psk_server_callback)(SSL *ssl, const char *identity,
		unsigned char *psk, unsigned int max_psk_len);
#endif

#ifndef OPENSSL_NO_BUF_FREELISTS
#define SSL_MAX_BUF_FREELIST_LEN_DEFAULT 32
	unsigned int freelist_max_len;
	struct ssl3_buf_freelist_st *wbuf_freelist;
	struct ssl3_buf_freelist_st *rbuf_freelist;
#endif
#ifndef OPENSSL_NO_SRP
	SRP_CTX srp_ctx; /* ctx for SRP authentication */
#endif

#ifndef OPENSSL_NO_TLSEXT

# ifndef OPENSSL_NO_NEXTPROTONEG
	/* Next protocol negotiation information */
	/* (for experimental NPN extension). */

	/* For a server, this contains a callback function by which the set of
	 * advertised protocols can be provided. */
	int (*next_protos_advertised_cb)(SSL *s, const unsigned char **buf,
			                 unsigned int *len, void *arg);
	void *next_protos_advertised_cb_arg;
	/* For a client, this contains a callback function that selects the
	 * next protocol from the list provided by the server. */
	int (*next_proto_select_cb)(SSL *s, unsigned char **out,
				    unsigned char *outlen,
				    const unsigned char *in,
				    unsigned int inlen,
				    void *arg);
	void *next_proto_select_cb_arg;
# endif

	/* ALPN information
	 * (we are in the process of transitioning from NPN to ALPN.) */

	/* For a server, this contains a callback function that allows the
	 * server to select the protocol for the connection.
	 *   out: on successful return, this must point to the raw protocol
	 *        name (without the length prefix).
	 *   outlen: on successful return, this contains the length of |*out|.
	 *   in: points to the client's list of supported protocols in
	 *       wire-format.
	 *   inlen: the length of |in|. */
	int (*alpn_select_cb)(SSL *s,
			      const unsigned char **out,
			      unsigned char *outlen,
			      const unsigned char* in,
			      unsigned int inlen,
			      void *arg);
	void *alpn_select_cb_arg;

	/* For a client, this contains the list of supported protocols in wire
	 * format. */
	unsigned char* alpn_client_proto_list;
	unsigned alpn_client_proto_list_len;

        /* SRTP profiles we are willing to do from RFC 5764 */
	STACK_OF(SRTP_PROTECTION_PROFILE) *srtp_profiles;  
#endif
	/* Callback for disabling session caching and ticket support
	 * on a session basis, depending on the chosen cipher. */
	int (*not_resumable_session_cb)(SSL *ssl, int is_forward_secure);
# ifndef OPENSSL_NO_EC
	/* EC extension values inherited by SSL structure */
	size_t tlsext_ecpointformatlist_length;
	unsigned char *tlsext_ecpointformatlist;
	size_t tlsext_ellipticcurvelist_length;
	unsigned char *tlsext_ellipticcurvelist;
# endif /* OPENSSL_NO_EC */
	/* Arrays containing the callbacks for custom TLS Extensions. */
	custom_cli_ext_record *custom_cli_ext_records;
	size_t custom_cli_ext_records_count;
	custom_srv_ext_record *custom_srv_ext_records;
	size_t custom_srv_ext_records_count;
	};

#endif

#define SSL_SESS_CACHE_OFF			0x0000
#define SSL_SESS_CACHE_CLIENT			0x0001
#define SSL_SESS_CACHE_SERVER			0x0002
#define SSL_SESS_CACHE_BOTH	(SSL_SESS_CACHE_CLIENT|SSL_SESS_CACHE_SERVER)
#define SSL_SESS_CACHE_NO_AUTO_CLEAR		0x0080
/* enough comments already ... see SSL_CTX_set_session_cache_mode(3) */
#define SSL_SESS_CACHE_NO_INTERNAL_LOOKUP	0x0100
#define SSL_SESS_CACHE_NO_INTERNAL_STORE	0x0200
#define SSL_SESS_CACHE_NO_INTERNAL \
	(SSL_SESS_CACHE_NO_INTERNAL_LOOKUP|SSL_SESS_CACHE_NO_INTERNAL_STORE)

LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx);
#define SSL_CTX_sess_number(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_NUMBER,0,NULL)
#define SSL_CTX_sess_connect(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CONNECT,0,NULL)
#define SSL_CTX_sess_connect_good(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CONNECT_GOOD,0,NULL)
#define SSL_CTX_sess_connect_renegotiate(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CONNECT_RENEGOTIATE,0,NULL)
#define SSL_CTX_sess_accept(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_ACCEPT,0,NULL)
#define SSL_CTX_sess_accept_renegotiate(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_ACCEPT_RENEGOTIATE,0,NULL)
#define SSL_CTX_sess_accept_good(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_ACCEPT_GOOD,0,NULL)
#define SSL_CTX_sess_hits(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_HIT,0,NULL)
#define SSL_CTX_sess_cb_hits(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CB_HIT,0,NULL)
#define SSL_CTX_sess_misses(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_MISSES,0,NULL)
#define SSL_CTX_sess_timeouts(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_TIMEOUTS,0,NULL)
#define SSL_CTX_sess_cache_full(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CACHE_FULL,0,NULL)

void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx, int (*new_session_cb)(struct ssl_st *ssl,SSL_SESSION *sess));
int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(struct ssl_st *ssl, SSL_SESSION *sess);
void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx, void (*remove_session_cb)(struct ssl_ctx_st *ctx,SSL_SESSION *sess));
void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(struct ssl_ctx_st *ctx, SSL_SESSION *sess);
void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx, SSL_SESSION *(*get_session_cb)(struct ssl_st *ssl, unsigned char *data,int len,int *copy));
SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(struct ssl_st *ssl, unsigned char *Data, int len, int *copy);
void SSL_CTX_set_info_callback(SSL_CTX *ctx, void (*cb)(const SSL *ssl,int type,int val));
void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl,int type,int val);
void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx, int (*client_cert_cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey));
int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL *ssl, X509 **x509, EVP_PKEY **pkey);
#ifndef OPENSSL_NO_ENGINE
int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e);
#endif
void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx, int (*app_gen_cookie_cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len));
void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx, int (*app_verify_cookie_cb)(SSL *ssl, unsigned char *cookie, unsigned int cookie_len));
#ifndef OPENSSL_NO_NEXTPROTONEG
void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *s,
					   int (*cb) (SSL *ssl,
						      const unsigned char **out,
						      unsigned int *outlen,
						      void *arg), void *arg);
void SSL_CTX_set_next_proto_select_cb(SSL_CTX *s,
				      int (*cb) (SSL *ssl, unsigned char **out,
						 unsigned char *outlen,
						 const unsigned char *in,
						 unsigned int inlen, void *arg),
				      void *arg);
void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
				    unsigned *len);
#endif

#ifndef OPENSSL_NO_TLSEXT
int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
			  const unsigned char *in, unsigned int inlen,
			  const unsigned char *client, unsigned int client_len);
#endif

#define OPENSSL_NPN_UNSUPPORTED	0
#define OPENSSL_NPN_NEGOTIATED	1
#define OPENSSL_NPN_NO_OVERLAP	2

int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char* protos,
			    unsigned protos_len);
int SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos,
			unsigned protos_len);
void SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx,
				int (*cb) (SSL *ssl,
					   const unsigned char **out,
					   unsigned char *outlen,
					   const unsigned char *in,
					   unsigned int inlen,
					   void *arg),
				void *arg);
void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
			    unsigned *len);

#ifndef OPENSSL_NO_PSK
/* the maximum length of the buffer given to callbacks containing the
 * resulting identity/psk */
#define PSK_MAX_IDENTITY_LEN 128
#define PSK_MAX_PSK_LEN 256
void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, 
	unsigned int (*psk_client_callback)(SSL *ssl, const char *hint, 
		char *identity, unsigned int max_identity_len, unsigned char *psk,
		unsigned int max_psk_len));
void SSL_set_psk_client_callback(SSL *ssl, 
	unsigned int (*psk_client_callback)(SSL *ssl, const char *hint, 
		char *identity, unsigned int max_identity_len, unsigned char *psk,
		unsigned int max_psk_len));
void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, 
	unsigned int (*psk_server_callback)(SSL *ssl, const char *identity,
		unsigned char *psk, unsigned int max_psk_len));
void SSL_set_psk_server_callback(SSL *ssl,
	unsigned int (*psk_server_callback)(SSL *ssl, const char *identity,
		unsigned char *psk, unsigned int max_psk_len));
int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint);
int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint);
const char *SSL_get_psk_identity_hint(const SSL *s);
const char *SSL_get_psk_identity(const SSL *s);
#endif

#ifndef OPENSSL_NO_TLSEXT
/* Register callbacks to handle custom TLS Extensions as client or server.
 * 
 * Returns nonzero on success.  You cannot register twice for the same 
 * extension number, and registering for an extension number already 
 * handled by OpenSSL will succeed, but the callbacks will not be invoked.
 *
 * NULL can be registered for any callback function.  For the client
 * functions, a NULL custom_cli_ext_first_cb_fn sends an empty ClientHello
 * Extension, and a NULL custom_cli_ext_second_cb_fn ignores the ServerHello
 * response (if any).
 *
 * For the server functions, a NULL custom_srv_ext_first_cb_fn means the
 * ClientHello extension's data will be ignored, but the extension will still
 * be noted and custom_srv_ext_second_cb_fn will still be invoked.  A NULL
 * custom_srv_ext_second_cb doesn't send a ServerHello extension.
 */
int SSL_CTX_set_custom_cli_ext(SSL_CTX *ctx, unsigned short ext_type,
			       custom_cli_ext_first_cb_fn fn1, 
			       custom_cli_ext_second_cb_fn fn2, void *arg);

int SSL_CTX_set_custom_srv_ext(SSL_CTX *ctx, unsigned short ext_type,
			       custom_srv_ext_first_cb_fn fn1, 
			       custom_srv_ext_second_cb_fn fn2, void *arg);

#endif

#define SSL_NOTHING	1
#define SSL_WRITING	2
#define SSL_READING	3
#define SSL_X509_LOOKUP	4

/* These will only be used when doing non-blocking IO */
#define SSL_want_nothing(s)	(SSL_want(s) == SSL_NOTHING)
#define SSL_want_read(s)	(SSL_want(s) == SSL_READING)
#define SSL_want_write(s)	(SSL_want(s) == SSL_WRITING)
#define SSL_want_x509_lookup(s)	(SSL_want(s) == SSL_X509_LOOKUP)

#define SSL_MAC_FLAG_READ_MAC_STREAM 1
#define SSL_MAC_FLAG_WRITE_MAC_STREAM 2

#ifndef OPENSSL_NO_SSL_INTERN

struct ssl_st
	{
	/* protocol version
	 * (one of SSL2_VERSION, SSL3_VERSION, TLS1_VERSION, DTLS1_VERSION)
	 */
	int version;
	int type; /* SSL_ST_CONNECT or SSL_ST_ACCEPT */

	const SSL_METHOD *method; /* SSLv3 */

	/* There are 2 BIO's even though they are normally both the
	 * same.  This is so data can be read and written to different
	 * handlers */

#ifndef OPENSSL_NO_BIO
	BIO *rbio; /* used by SSL_read */
	BIO *wbio; /* used by SSL_write */
	BIO *bbio; /* used during session-id reuse to concatenate
		    * messages */
#else
	char *rbio; /* used by SSL_read */
	char *wbio; /* used by SSL_write */
	char *bbio;
#endif
	/* This holds a variable that indicates what we were doing
	 * when a 0 or -1 is returned.  This is needed for
	 * non-blocking IO so we know what request needs re-doing when
	 * in SSL_accept or SSL_connect */
	int rwstate;

	/* true when we are actually in SSL_accept() or SSL_connect() */
	int in_handshake;
	int (*handshake_func)(SSL *);

	/* Imagine that here's a boolean member "init" that is
	 * switched as soon as SSL_set_{accept/connect}_state
	 * is called for the first time, so that "state" and
	 * "handshake_func" are properly initialized.  But as
	 * handshake_func is == 0 until then, we use this
	 * test instead of an "init" member.
	 */

	int server;	/* are we the server side? - mostly used by SSL_clear*/

	int new_session;/* Generate a new session or reuse an old one.
	                 * NB: For servers, the 'new' session may actually be a previously
	                 * cached session or even the previous session unless
	                 * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
	int quiet_shutdown;/* don't send shutdown packets */
	int shutdown;	/* we have shut things down, 0x01 sent, 0x02
			 * for received */
	int state;	/* where we are */
	int rstate;	/* where we are when reading */

	BUF_MEM *init_buf;	/* buffer used during init */
	void *init_msg;   	/* pointer to handshake message body, set by ssl3_get_message() */
	int init_num;		/* amount read/written */
	int init_off;		/* amount read/written */

	/* used internally to point at a raw packet */
	unsigned char *packet;
	unsigned int packet_length;

	struct ssl2_state_st *s2; /* SSLv2 variables */
	struct ssl3_state_st *s3; /* SSLv3 variables */
	struct dtls1_state_st *d1; /* DTLSv1 variables */

	int read_ahead;		/* Read as many input bytes as possible
	               	 	 * (for non-blocking reads) */

	/* callback that allows applications to peek at protocol messages */
	void (*msg_callback)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg);
	void *msg_callback_arg;

	int hit;		/* reusing a previous session */

	X509_VERIFY_PARAM *param;

#if 0
	int purpose;		/* Purpose setting */
	int trust;		/* Trust setting */
#endif

	/* crypto */
	STACK_OF(SSL_CIPHER) *cipher_list;
	STACK_OF(SSL_CIPHER) *cipher_list_by_id;

	/* These are the ones being used, the ones in SSL_SESSION are
	 * the ones to be 'copied' into these ones */
	int mac_flags; 
	EVP_CIPHER_CTX *enc_read_ctx;		/* cryptographic state */
	EVP_MD_CTX *read_hash;		/* used for mac generation */
#ifndef OPENSSL_NO_COMP
	COMP_CTX *expand;			/* uncompress */
#else
	char *expand;
#endif

	EVP_CIPHER_CTX *enc_write_ctx;		/* cryptographic state */
	EVP_MD_CTX *write_hash;		/* used for mac generation */
#ifndef OPENSSL_NO_COMP
	COMP_CTX *compress;			/* compression */
#else
	char *compress;	
#endif

	/* session info */

	/* client cert? */
	/* This is used to hold the server certificate used */
	struct cert_st /* CERT */ *cert;

	/* the session_id_context is used to ensure sessions are only reused
	 * in the appropriate context */
	unsigned int sid_ctx_length;
	unsigned char sid_ctx[SSL_MAX_SID_CTX_LENGTH];

	/* This can also be in the session once a session is established */
	SSL_SESSION *session;

	/* Default generate session ID callback. */
	GEN_SESSION_CB generate_session_id;

	/* Used in SSL2 and SSL3 */
	int verify_mode;	/* 0 don't care about verify failure.
				 * 1 fail if verify fails */
	int (*verify_callback)(int ok,X509_STORE_CTX *ctx); /* fail if callback returns 0 */

	void (*info_callback)(const SSL *ssl,int type,int val); /* optional informational callback */

	int error;		/* error bytes to be written */
	int error_code;		/* actual code */

#ifndef OPENSSL_NO_KRB5
	KSSL_CTX *kssl_ctx;     /* Kerberos 5 context */
#endif	/* OPENSSL_NO_KRB5 */

#ifndef OPENSSL_NO_PSK
	unsigned int (*psk_client_callback)(SSL *ssl, const char *hint, char *identity,
		unsigned int max_identity_len, unsigned char *psk,
		unsigned int max_psk_len);
	unsigned int (*psk_server_callback)(SSL *ssl, const char *identity,
		unsigned char *psk, unsigned int max_psk_len);
#endif

	SSL_CTX *ctx;
	/* set this flag to 1 and a sleep(1) is put into all SSL_read()
	 * and SSL_write() calls, good for nbio debuging :-) */
	int debug;	

	/* extra application data */
	long verify_result;
	CRYPTO_EX_DATA ex_data;

	/* for server side, keep the list of CA_dn we can use */
	STACK_OF(X509_NAME) *client_CA;

	int references;
	unsigned long options; /* protocol behaviour */
	unsigned long mode; /* API behaviour */
	long max_cert_list;
	int first_packet;
	int client_version;	/* what was passed, used for
				 * SSLv3/TLS rollback check */
	unsigned int max_send_fragment;
#ifndef OPENSSL_NO_TLSEXT
	/* TLS extension debug callback */
	void (*tlsext_debug_cb)(SSL *s, int client_server, int type,
					unsigned char *data, int len,
					void *arg);
	void *tlsext_debug_arg;
	char *tlsext_hostname;
	int servername_done;   /* no further mod of servername 
	                          0 : call the servername extension callback.
	                          1 : prepare 2, allow last ack just after in server callback.
	                          2 : don't call servername callback, no ack in server hello
	                       */
	/* certificate status request info */
	/* Status type or -1 if no status type */
	int tlsext_status_type;
	/* Expect OCSP CertificateStatus message */
	int tlsext_status_expected;
	/* OCSP status request only */
	STACK_OF(OCSP_RESPID) *tlsext_ocsp_ids;
	X509_EXTENSIONS *tlsext_ocsp_exts;
	/* OCSP response received or to be sent */
	unsigned char *tlsext_ocsp_resp;
	int tlsext_ocsp_resplen;

	/* RFC4507 session ticket expected to be received or sent */
	int tlsext_ticket_expected;
#ifndef OPENSSL_NO_EC
	size_t tlsext_ecpointformatlist_length;
	unsigned char *tlsext_ecpointformatlist; /* our list */
	size_t tlsext_ellipticcurvelist_length;
	unsigned char *tlsext_ellipticcurvelist; /* our list */
#endif /* OPENSSL_NO_EC */

	/* draft-rescorla-tls-opaque-prf-input-00.txt information to be used for handshakes */
	void *tlsext_opaque_prf_input;
	size_t tlsext_opaque_prf_input_len;

	/* TLS Session Ticket extension override */
	TLS_SESSION_TICKET_EXT *tlsext_session_ticket;

	/* TLS Session Ticket extension callback */
	tls_session_ticket_ext_cb_fn tls_session_ticket_ext_cb;
	void *tls_session_ticket_ext_cb_arg;

	/* TLS pre-shared secret session resumption */
	tls_session_secret_cb_fn tls_session_secret_cb;
	void *tls_session_secret_cb_arg;

	SSL_CTX * initial_ctx; /* initial ctx, used to store sessions */

#ifndef OPENSSL_NO_NEXTPROTONEG
	/* Next protocol negotiation. For the client, this is the protocol that
	 * we sent in NextProtocol and is set when handling ServerHello
	 * extensions.
	 *
	 * For a server, this is the client's selected_protocol from
	 * NextProtocol and is set when handling the NextProtocol message,
	 * before the Finished message. */
	unsigned char *next_proto_negotiated;
	unsigned char next_proto_negotiated_len;
#endif

#define session_ctx initial_ctx

	STACK_OF(SRTP_PROTECTION_PROFILE) *srtp_profiles;  /* What we'll do */
	SRTP_PROTECTION_PROFILE *srtp_profile;            /* What's been chosen */

	unsigned int tlsext_heartbeat;  /* Is use of the Heartbeat extension negotiated?
	                                   0: disabled
	                                   1: enabled
	                                   2: enabled, but not allowed to send Requests
	                                 */
	unsigned int tlsext_hb_pending; /* Indicates if a HeartbeatRequest is in flight */
	unsigned int tlsext_hb_seq;     /* HeartbeatRequest sequence number */

	/* For a client, this contains the list of supported protocols in wire
	 * format. */
	unsigned char* alpn_client_proto_list;
	unsigned alpn_client_proto_list_len;
#else
#define session_ctx ctx
#endif /* OPENSSL_NO_TLSEXT */

	int renegotiate;/* 1 if we are renegotiating.
	                 * 2 if we are a server and are inside a handshake
	                 * (i.e. not just sending a HelloRequest) */

#ifndef OPENSSL_NO_SRP
	SRP_CTX srp_ctx; /* ctx for SRP authentication */
#endif

	/* Callback for disabling session caching and ticket support
	 * on a session basis, depending on the chosen cipher. */
	int (*not_resumable_session_cb)(SSL *ssl, int is_forward_secure);
	};

#endif

#ifdef __cplusplus
}
#endif

#include <openssl/ssl2.h>
#include <openssl/ssl3.h>
#include <openssl/tls1.h> /* This is mostly sslv3 with a few tweaks */
#include <openssl/dtls1.h> /* Datagram TLS */
#include <openssl/ssl23.h>
#include <openssl/srtp.h>  /* Support for the use_srtp extension */

#ifdef  __cplusplus
extern "C" {
#endif

/* compatibility */
#define SSL_set_app_data(s,arg)		(SSL_set_ex_data(s,0,(char *)arg))
#define SSL_get_app_data(s)		(SSL_get_ex_data(s,0))
#define SSL_SESSION_set_app_data(s,a)	(SSL_SESSION_set_ex_data(s,0,(char *)a))
#define SSL_SESSION_get_app_data(s)	(SSL_SESSION_get_ex_data(s,0))
#define SSL_CTX_get_app_data(ctx)	(SSL_CTX_get_ex_data(ctx,0))
#define SSL_CTX_set_app_data(ctx,arg)	(SSL_CTX_set_ex_data(ctx,0,(char *)arg))

/* The following are the possible values for ssl->state are are
 * used to indicate where we are up to in the SSL connection establishment.
 * The macros that follow are about the only things you should need to use
 * and even then, only when using non-blocking IO.
 * It can also be useful to work out where you were when the connection
 * failed */

#define SSL_ST_CONNECT			0x1000
#define SSL_ST_ACCEPT			0x2000
#define SSL_ST_MASK			0x0FFF
#define SSL_ST_INIT			(SSL_ST_CONNECT|SSL_ST_ACCEPT)
#define SSL_ST_BEFORE			0x4000
#define SSL_ST_OK			0x03
#define SSL_ST_RENEGOTIATE		(0x04|SSL_ST_INIT)

#define SSL_CB_LOOP			0x01
#define SSL_CB_EXIT			0x02
#define SSL_CB_READ			0x04
#define SSL_CB_WRITE			0x08
#define SSL_CB_ALERT			0x4000 /* used in callback */
#define SSL_CB_READ_ALERT		(SSL_CB_ALERT|SSL_CB_READ)
#define SSL_CB_WRITE_ALERT		(SSL_CB_ALERT|SSL_CB_WRITE)
#define SSL_CB_ACCEPT_LOOP		(SSL_ST_ACCEPT|SSL_CB_LOOP)
#define SSL_CB_ACCEPT_EXIT		(SSL_ST_ACCEPT|SSL_CB_EXIT)
#define SSL_CB_CONNECT_LOOP		(SSL_ST_CONNECT|SSL_CB_LOOP)
#define SSL_CB_CONNECT_EXIT		(SSL_ST_CONNECT|SSL_CB_EXIT)
#define SSL_CB_HANDSHAKE_START		0x10
#define SSL_CB_HANDSHAKE_DONE		0x20

/* Is the SSL_connection established? */
#define SSL_get_state(a)		SSL_state(a)
#define SSL_is_init_finished(a)		(SSL_state(a) == SSL_ST_OK)
#define SSL_in_init(a)			(SSL_state(a)&SSL_ST_INIT)
#define SSL_in_before(a)		(SSL_state(a)&SSL_ST_BEFORE)
#define SSL_in_connect_init(a)		(SSL_state(a)&SSL_ST_CONNECT)
#define SSL_in_accept_init(a)		(SSL_state(a)&SSL_ST_ACCEPT)

/* The following 2 states are kept in ssl->rstate when reads fail,
 * you should not need these */
#define SSL_ST_READ_HEADER			0xF0
#define SSL_ST_READ_BODY			0xF1
#define SSL_ST_READ_DONE			0xF2

/* Obtain latest Finished message
 *   -- that we sent (SSL_get_finished)
 *   -- that we expected from peer (SSL_get_peer_finished).
 * Returns length (0 == no Finished so far), copies up to 'count' bytes. */
size_t SSL_get_finished(const SSL *s, void *buf, size_t count);
size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count);

/* use either SSL_VERIFY_NONE or SSL_VERIFY_PEER, the last 2 options
 * are 'ored' with SSL_VERIFY_PEER if they are desired */
#define SSL_VERIFY_NONE			0x00
#define SSL_VERIFY_PEER			0x01
#define SSL_VERIFY_FAIL_IF_NO_PEER_CERT	0x02
#define SSL_VERIFY_CLIENT_ONCE		0x04

#define OpenSSL_add_ssl_algorithms()	SSL_library_init()
#define SSLeay_add_ssl_algorithms()	SSL_library_init()

/* this is for backward compatibility */
#if 0 /* NEW_SSLEAY */
#define SSL_CTX_set_default_verify(a,b,c) SSL_CTX_set_verify(a,b,c)
#define SSL_set_pref_cipher(c,n)	SSL_set_cipher_list(c,n)
#define SSL_add_session(a,b)            SSL_CTX_add_session((a),(b))
#define SSL_remove_session(a,b)		SSL_CTX_remove_session((a),(b))
#define SSL_flush_sessions(a,b)		SSL_CTX_flush_sessions((a),(b))
#endif
/* More backward compatibility */
#define SSL_get_cipher(s) \
		SSL_CIPHER_get_name(SSL_get_current_cipher(s))
#define SSL_get_cipher_bits(s,np) \
		SSL_CIPHER_get_bits(SSL_get_current_cipher(s),np)
#define SSL_get_cipher_version(s) \
		SSL_CIPHER_get_version(SSL_get_current_cipher(s))
#define SSL_get_cipher_name(s) \
		SSL_CIPHER_get_name(SSL_get_current_cipher(s))
#define SSL_get_time(a)		SSL_SESSION_get_time(a)
#define SSL_set_time(a,b)	SSL_SESSION_set_time((a),(b))
#define SSL_get_timeout(a)	SSL_SESSION_get_timeout(a)
#define SSL_set_timeout(a,b)	SSL_SESSION_set_timeout((a),(b))

#define d2i_SSL_SESSION_bio(bp,s_id) ASN1_d2i_bio_of(SSL_SESSION,SSL_SESSION_new,d2i_SSL_SESSION,bp,s_id)
#define i2d_SSL_SESSION_bio(bp,s_id) ASN1_i2d_bio_of(SSL_SESSION,i2d_SSL_SESSION,bp,s_id)

DECLARE_PEM_rw(SSL_SESSION, SSL_SESSION)

#define SSL_AD_REASON_OFFSET		1000 /* offset to get SSL_R_... value from SSL_AD_... */

/* These alert types are for SSLv3 and TLSv1 */
#define SSL_AD_CLOSE_NOTIFY		SSL3_AD_CLOSE_NOTIFY
#define SSL_AD_UNEXPECTED_MESSAGE	SSL3_AD_UNEXPECTED_MESSAGE /* fatal */
#define SSL_AD_BAD_RECORD_MAC		SSL3_AD_BAD_RECORD_MAC     /* fatal */
#define SSL_AD_DECRYPTION_FAILED	TLS1_AD_DECRYPTION_FAILED
#define SSL_AD_RECORD_OVERFLOW		TLS1_AD_RECORD_OVERFLOW
#define SSL_AD_DECOMPRESSION_FAILURE	SSL3_AD_DECOMPRESSION_FAILURE/* fatal */
#define SSL_AD_HANDSHAKE_FAILURE	SSL3_AD_HANDSHAKE_FAILURE/* fatal */
#define SSL_AD_NO_CERTIFICATE		SSL3_AD_NO_CERTIFICATE /* Not for TLS */
#define SSL_AD_BAD_CERTIFICATE		SSL3_AD_BAD_CERTIFICATE
#define SSL_AD_UNSUPPORTED_CERTIFICATE	SSL3_AD_UNSUPPORTED_CERTIFICATE
#define SSL_AD_CERTIFICATE_REVOKED	SSL3_AD_CERTIFICATE_REVOKED
#define SSL_AD_CERTIFICATE_EXPIRED	SSL3_AD_CERTIFICATE_EXPIRED
#define SSL_AD_CERTIFICATE_UNKNOWN	SSL3_AD_CERTIFICATE_UNKNOWN
#define SSL_AD_ILLEGAL_PARAMETER	SSL3_AD_ILLEGAL_PARAMETER   /* fatal */
#define SSL_AD_UNKNOWN_CA		TLS1_AD_UNKNOWN_CA	/* fatal */
#define SSL_AD_ACCESS_DENIED		TLS1_AD_ACCESS_DENIED	/* fatal */
#define SSL_AD_DECODE_ERROR		TLS1_AD_DECODE_ERROR	/* fatal */
#define SSL_AD_DECRYPT_ERROR		TLS1_AD_DECRYPT_ERROR
#define SSL_AD_EXPORT_RESTRICTION	TLS1_AD_EXPORT_RESTRICTION/* fatal */
#define SSL_AD_PROTOCOL_VERSION		TLS1_AD_PROTOCOL_VERSION /* fatal */
#define SSL_AD_INSUFFICIENT_SECURITY	TLS1_AD_INSUFFICIENT_SECURITY/* fatal */
#define SSL_AD_INTERNAL_ERROR		TLS1_AD_INTERNAL_ERROR	/* fatal */
#define SSL_AD_USER_CANCELLED		TLS1_AD_USER_CANCELLED
#define SSL_AD_NO_RENEGOTIATION		TLS1_AD_NO_RENEGOTIATION
#define SSL_AD_UNSUPPORTED_EXTENSION	TLS1_AD_UNSUPPORTED_EXTENSION
#define SSL_AD_CERTIFICATE_UNOBTAINABLE TLS1_AD_CERTIFICATE_UNOBTAINABLE
#define SSL_AD_UNRECOGNIZED_NAME	TLS1_AD_UNRECOGNIZED_NAME
#define SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE
#define SSL_AD_BAD_CERTIFICATE_HASH_VALUE TLS1_AD_BAD_CERTIFICATE_HASH_VALUE
#define SSL_AD_UNKNOWN_PSK_IDENTITY     TLS1_AD_UNKNOWN_PSK_IDENTITY /* fatal */

#define SSL_ERROR_NONE			0
#define SSL_ERROR_SSL			1
#define SSL_ERROR_WANT_READ		2
#define SSL_ERROR_WANT_WRITE		3
#define SSL_ERROR_WANT_X509_LOOKUP	4
#define SSL_ERROR_SYSCALL		5 /* look at error stack/return value/errno */
#define SSL_ERROR_ZERO_RETURN		6
#define SSL_ERROR_WANT_CONNECT		7
#define SSL_ERROR_WANT_ACCEPT		8

#define SSL_CTRL_NEED_TMP_RSA			1
#define SSL_CTRL_SET_TMP_RSA			2
#define SSL_CTRL_SET_TMP_DH			3
#define SSL_CTRL_SET_TMP_ECDH			4
#define SSL_CTRL_SET_TMP_RSA_CB			5
#define SSL_CTRL_SET_TMP_DH_CB			6
#define SSL_CTRL_SET_TMP_ECDH_CB		7

#define SSL_CTRL_GET_SESSION_REUSED		8
#define SSL_CTRL_GET_CLIENT_CERT_REQUEST	9
#define SSL_CTRL_GET_NUM_RENEGOTIATIONS		10
#define SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS	11
#define SSL_CTRL_GET_TOTAL_RENEGOTIATIONS	12
#define SSL_CTRL_GET_FLAGS			13
#define SSL_CTRL_EXTRA_CHAIN_CERT		14

#define SSL_CTRL_SET_MSG_CALLBACK               15
#define SSL_CTRL_SET_MSG_CALLBACK_ARG           16

/* only applies to datagram connections */
#define SSL_CTRL_SET_MTU                17
/* Stats */
#define SSL_CTRL_SESS_NUMBER			20
#define SSL_CTRL_SESS_CONNECT			21
#define SSL_CTRL_SESS_CONNECT_GOOD		22
#define SSL_CTRL_SESS_CONNECT_RENEGOTIATE	23
#define SSL_CTRL_SESS_ACCEPT			24
#define SSL_CTRL_SESS_ACCEPT_GOOD		25
#define SSL_CTRL_SESS_ACCEPT_RENEGOTIATE	26
#define SSL_CTRL_SESS_HIT			27
#define SSL_CTRL_SESS_CB_HIT			28
#define SSL_CTRL_SESS_MISSES			29
#define SSL_CTRL_SESS_TIMEOUTS			30
#define SSL_CTRL_SESS_CACHE_FULL		31
#define SSL_CTRL_OPTIONS			32
#define SSL_CTRL_MODE				33

#define SSL_CTRL_GET_READ_AHEAD			40
#define SSL_CTRL_SET_READ_AHEAD			41
#define SSL_CTRL_SET_SESS_CACHE_SIZE		42
#define SSL_CTRL_GET_SESS_CACHE_SIZE		43
#define SSL_CTRL_SET_SESS_CACHE_MODE		44
#define SSL_CTRL_GET_SESS_CACHE_MODE		45

#define SSL_CTRL_GET_MAX_CERT_LIST		50
#define SSL_CTRL_SET_MAX_CERT_LIST		51

#define SSL_CTRL_SET_MAX_SEND_FRAGMENT		52

/* see tls1.h for macros based on these */
#ifndef OPENSSL_NO_TLSEXT
#define SSL_CTRL_SET_TLSEXT_SERVERNAME_CB	53
#define SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG	54
#define SSL_CTRL_SET_TLSEXT_HOSTNAME		55
#define SSL_CTRL_SET_TLSEXT_DEBUG_CB		56
#define SSL_CTRL_SET_TLSEXT_DEBUG_ARG		57
#define SSL_CTRL_GET_TLSEXT_TICKET_KEYS		58
#define SSL_CTRL_SET_TLSEXT_TICKET_KEYS		59
#define SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT	60
#define SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT_CB	61
#define SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT_CB_ARG 62
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB	63
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB_ARG	64
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_TYPE	65
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_EXTS	66
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_EXTS	67
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_IDS	68
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_IDS	69
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_OCSP_RESP	70
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_OCSP_RESP	71

#define SSL_CTRL_SET_TLSEXT_TICKET_KEY_CB	72

#define SSL_CTRL_SET_TLS_EXT_SRP_USERNAME_CB	75
#define SSL_CTRL_SET_SRP_VERIFY_PARAM_CB		76
#define SSL_CTRL_SET_SRP_GIVE_CLIENT_PWD_CB		77

#define SSL_CTRL_SET_SRP_ARG		78
#define SSL_CTRL_SET_TLS_EXT_SRP_USERNAME		79
#define SSL_CTRL_SET_TLS_EXT_SRP_STRENGTH		80
#define SSL_CTRL_SET_TLS_EXT_SRP_PASSWORD		81
#ifndef OPENSSL_NO_HEARTBEATS
#define SSL_CTRL_TLS_EXT_SEND_HEARTBEAT				85
#define SSL_CTRL_GET_TLS_EXT_HEARTBEAT_PENDING		86
#define SSL_CTRL_SET_TLS_EXT_HEARTBEAT_NO_REQUESTS	87
#endif
#endif /* OPENSSL_NO_TLSEXT */

#define DTLS_CTRL_GET_TIMEOUT		73
#define DTLS_CTRL_HANDLE_TIMEOUT	74
#define DTLS_CTRL_LISTEN			75

#define SSL_CTRL_GET_RI_SUPPORT			76
#define SSL_CTRL_CLEAR_OPTIONS			77
#define SSL_CTRL_CLEAR_MODE			78
#define SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB	79

#define SSL_CTRL_GET_EXTRA_CHAIN_CERTS		82
#define SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS	83

#define SSL_CTRL_CHAIN				88
#define SSL_CTRL_CHAIN_CERT			89

#define SSL_CTRL_GET_CURVES			90
#define SSL_CTRL_SET_CURVES			91
#define SSL_CTRL_SET_CURVES_LIST		92
#define SSL_CTRL_GET_SHARED_CURVE		93
#define SSL_CTRL_SET_ECDH_AUTO			94
#define SSL_CTRL_SET_SIGALGS			97
#define SSL_CTRL_SET_SIGALGS_LIST		98
#define SSL_CTRL_CERT_FLAGS			99
#define SSL_CTRL_CLEAR_CERT_FLAGS		100
#define SSL_CTRL_SET_CLIENT_SIGALGS		101
#define SSL_CTRL_SET_CLIENT_SIGALGS_LIST	102
#define SSL_CTRL_GET_CLIENT_CERT_TYPES		103
#define SSL_CTRL_SET_CLIENT_CERT_TYPES		104
#define SSL_CTRL_BUILD_CERT_CHAIN		105
#define SSL_CTRL_SET_VERIFY_CERT_STORE		106
#define SSL_CTRL_SET_CHAIN_CERT_STORE		107
#define SSL_CTRL_GET_PEER_SIGNATURE_NID		108
#define SSL_CTRL_GET_SERVER_TMP_KEY		109
#define SSL_CTRL_GET_RAW_CIPHERLIST		110
#define SSL_CTRL_GET_EC_POINT_FORMATS		111

#define SSL_CTRL_GET_CHAIN_CERTS		115
#define SSL_CTRL_SELECT_CURRENT_CERT		116
#define SSL_CTRL_SET_CURRENT_CERT		117

#define SSL_CERT_SET_FIRST			1
#define SSL_CERT_SET_NEXT			2
#define SSL_CERT_SET_SERVER			3

#define SSL_CTRL_SET_DH_AUTO			118

#define DTLSv1_get_timeout(ssl, arg) \
	SSL_ctrl(ssl,DTLS_CTRL_GET_TIMEOUT,0, (void *)arg)
#define DTLSv1_handle_timeout(ssl) \
	SSL_ctrl(ssl,DTLS_CTRL_HANDLE_TIMEOUT,0, NULL)
#define DTLSv1_listen(ssl, peer) \
	SSL_ctrl(ssl,DTLS_CTRL_LISTEN,0, (void *)peer)

#define SSL_session_reused(ssl) \
	SSL_ctrl((ssl),SSL_CTRL_GET_SESSION_REUSED,0,NULL)
#define SSL_num_renegotiations(ssl) \
	SSL_ctrl((ssl),SSL_CTRL_GET_NUM_RENEGOTIATIONS,0,NULL)
#define SSL_clear_num_renegotiations(ssl) \
	SSL_ctrl((ssl),SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS,0,NULL)
#define SSL_total_renegotiations(ssl) \
	SSL_ctrl((ssl),SSL_CTRL_GET_TOTAL_RENEGOTIATIONS,0,NULL)

#define SSL_CTX_need_tmp_RSA(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_NEED_TMP_RSA,0,NULL)
#define SSL_CTX_set_tmp_rsa(ctx,rsa) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA,0,(char *)rsa)
#define SSL_CTX_set_tmp_dh(ctx,dh) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH,0,(char *)dh)
#define SSL_CTX_set_tmp_ecdh(ctx,ecdh) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH,0,(char *)ecdh)

#define SSL_CTX_set_dh_auto(ctx, onoff) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_DH_AUTO,onoff,NULL)
#define SSL_set_dh_auto(s, onoff) \
	SSL_ctrl(s,SSL_CTRL_SET_DH_AUTO,onoff,NULL)

#define SSL_need_tmp_RSA(ssl) \
	SSL_ctrl(ssl,SSL_CTRL_NEED_TMP_RSA,0,NULL)
#define SSL_set_tmp_rsa(ssl,rsa) \
	SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA,0,(char *)rsa)
#define SSL_set_tmp_dh(ssl,dh) \
	SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH,0,(char *)dh)
#define SSL_set_tmp_ecdh(ssl,ecdh) \
	SSL_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH,0,(char *)ecdh)

#define SSL_CTX_add_extra_chain_cert(ctx,x509) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_EXTRA_CHAIN_CERT,0,(char *)x509)
#define SSL_CTX_get_extra_chain_certs(ctx,px509) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_GET_EXTRA_CHAIN_CERTS,0,px509)
#define SSL_CTX_get_extra_chain_certs_only(ctx,px509) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_GET_EXTRA_CHAIN_CERTS,1,px509)
#define SSL_CTX_clear_extra_chain_certs(ctx) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS,0,NULL)

#define SSL_CTX_set0_chain(ctx,sk) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_CHAIN,0,(char *)sk)
#define SSL_CTX_set1_chain(ctx,sk) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_CHAIN,1,(char *)sk)
#define SSL_CTX_add0_chain_cert(ctx,x509) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_CHAIN_CERT,0,(char *)x509)
#define SSL_CTX_add1_chain_cert(ctx,x509) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_CHAIN_CERT,1,(char *)x509)
#define SSL_CTX_get0_chain_certs(ctx,px509) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_GET_CHAIN_CERTS,0,px509)
#define SSL_CTX_clear_chain_certs(ctx) \
	SSL_CTX_set0_chain(ctx,NULL)
#define SSL_CTX_build_cert_chain(ctx, flags) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_BUILD_CERT_CHAIN, flags, NULL)
#define SSL_CTX_select_current_cert(ctx,x509) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SELECT_CURRENT_CERT,0,(char *)x509)

#define SSL_CTX_set_current_cert(ctx, op) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CURRENT_CERT, op, NULL)

#define SSL_CTX_set0_verify_cert_store(ctx,st) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_VERIFY_CERT_STORE,0,(char *)st)
#define SSL_CTX_set1_verify_cert_store(ctx,st) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_VERIFY_CERT_STORE,1,(char *)st)
#define SSL_CTX_set0_chain_cert_store(ctx,st) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CHAIN_CERT_STORE,0,(char *)st)
#define SSL_CTX_set1_chain_cert_store(ctx,st) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CHAIN_CERT_STORE,1,(char *)st)

#define SSL_set0_chain(ctx,sk) \
	SSL_ctrl(ctx,SSL_CTRL_CHAIN,0,(char *)sk)
#define SSL_set1_chain(ctx,sk) \
	SSL_ctrl(ctx,SSL_CTRL_CHAIN,1,(char *)sk)
#define SSL_add0_chain_cert(ctx,x509) \
	SSL_ctrl(ctx,SSL_CTRL_CHAIN_CERT,0,(char *)x509)
#define SSL_add1_chain_cert(ctx,x509) \
	SSL_ctrl(ctx,SSL_CTRL_CHAIN_CERT,1,(char *)x509)
#define SSL_get0_chain_certs(ctx,px509) \
	SSL_ctrl(ctx,SSL_CTRL_GET_CHAIN_CERTS,0,px509)
#define SSL_clear_chain_certs(ctx) \
	SSL_set0_chain(ctx,NULL)
#define SSL_build_cert_chain(s, flags) \
	SSL_ctrl(s,SSL_CTRL_BUILD_CERT_CHAIN, flags, NULL)
#define SSL_select_current_cert(ctx,x509) \
	SSL_ctrl(ctx,SSL_CTRL_SELECT_CURRENT_CERT,0,(char *)x509)
#define SSL_set_current_cert(ctx,op) \
	SSL_ctrl(ctx,SSL_CTRL_SET_CURRENT_CERT, op, NULL)

#define SSL_set0_verify_cert_store(s,st) \
	SSL_ctrl(s,SSL_CTRL_SET_VERIFY_CERT_STORE,0,(char *)st)
#define SSL_set1_verify_cert_store(s,st) \
	SSL_ctrl(s,SSL_CTRL_SET_VERIFY_CERT_STORE,1,(char *)st)
#define SSL_set0_chain_cert_store(s,st) \
	SSL_ctrl(s,SSL_CTRL_SET_CHAIN_CERT_STORE,0,(char *)st)
#define SSL_set1_chain_cert_store(s,st) \
	SSL_ctrl(s,SSL_CTRL_SET_CHAIN_CERT_STORE,1,(char *)st)

#define SSL_get1_curves(ctx, s) \
	SSL_ctrl(ctx,SSL_CTRL_GET_CURVES,0,(char *)s)
#define SSL_CTX_set1_curves(ctx, clist, clistlen) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CURVES,clistlen,(char *)clist)
#define SSL_CTX_set1_curves_list(ctx, s) \
	SSL_CTX_ctrl(ctx,SSL_CTRL_SET_CURVES_LIST,0,(char *)s)
#define SSL_set1_curves(ctx, clist, clistlen) \
	SSL_ctrl(ctx,SSL_CTRL_SET_CURVES,clistlen,(char *)clist)
#define SSL_set1_curves_list(ctx, s) \
	SSL_ctrl(ctx,SSL_CTRL_SET_CURVES_LIST,0,(char *)s)
#define SSL_get_shared_curve(s, n) \
	SSL_ctrl(s,SSL_CTRL_GET_SHARED_CURVE,n,NULL)