ssl_lib.c

	int i;

	if (a == NULL) return;

	i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
#ifdef REF_PRINT
	REF_PRINT("SSL_CTX",a);
#endif
	if (i > 0) return;
#ifdef REF_CHECK
	if (i < 0)
		{
		fprintf(stderr,"SSL_CTX_free, bad reference count\n");
		abort(); /* ok */
		}
#endif
	CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);

	if (a->sessions != NULL)
		{
		SSL_CTX_flush_sessions(a,0);
		lh_free(a->sessions);
		}
	if (a->cert_store != NULL)
		X509_STORE_free(a->cert_store);
	if (a->cipher_list != NULL)
		sk_free(a->cipher_list);
	if (a->cipher_list_by_id != NULL)
		sk_free(a->cipher_list_by_id);
	if (a->default_cert != NULL)
		ssl_cert_free(a->default_cert);
	if (a->client_CA != NULL)
		sk_pop_free(a->client_CA,X509_NAME_free);
	if (a->extra_certs != NULL)
		sk_pop_free(a->extra_certs,X509_free);
	if (a->comp_methods != NULL)
		sk_pop_free(a->comp_methods,FreeFunc);
	Free((char *)a);
	}

void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,int (*cb)())
	{
	ctx->default_passwd_callback=cb;
	}

void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx,int (*cb)(),char *arg)
	{
	ctx->app_verify_callback=cb;
	ctx->app_verify_arg=arg;
	}

void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
	{
	ctx->verify_mode=mode;
	ctx->default_verify_callback=cb;
	/* This needs cleaning up EAY EAY EAY */
	X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
	}

/* Need default_cert to check for callbacks, for now (see comment in CERT
   strucure)
*/
void ssl_set_cert_masks(CERT *c,CERT *default_cert,SSL_CIPHER *cipher)
	{
	CERT_PKEY *cpk;
	int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
	int rsa_enc_export,dh_rsa_export,dh_dsa_export;
	int rsa_tmp_export,dh_tmp_export,kl;
	unsigned long mask,emask;

	if (c == NULL) return;

	kl=SSL_C_EXPORT_PKEYLENGTH(cipher);

#ifndef NO_RSA
	rsa_tmp=(c->rsa_tmp != NULL || default_cert->rsa_tmp_cb != NULL);
	rsa_tmp_export=(default_cert->rsa_tmp_cb != NULL ||
		(rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
#else
	rsa_tmp=rsa_tmp_export=0;
#endif
#ifndef NO_DH
	dh_tmp=(c->dh_tmp != NULL || default_cert->dh_tmp_cb != NULL);
	dh_tmp_export=(default_cert->dh_tmp_cb != NULL ||
		(dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
#else
	dh_tmp=dh_tmp_export=0;
#endif

	cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
	rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
	rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
	cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
	rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
	cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
	dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
	cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
	dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
	dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
	cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
/* FIX THIS EAY EAY EAY */
	dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
	dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);

	mask=0;
	emask=0;

#ifdef CIPHER_DEBUG
	printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
		rsa_tmp,rsa_tmp_export,dh_tmp,
		rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
#endif

	if (rsa_enc || (rsa_tmp && rsa_sign))
		mask|=SSL_kRSA;
	if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
		emask|=SSL_kRSA;

#if 0
	/* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
	if (	(dh_tmp || dh_rsa || dh_dsa) && 
		(rsa_enc || rsa_sign || dsa_sign))
		mask|=SSL_kEDH;
	if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
		(rsa_enc || rsa_sign || dsa_sign))
		emask|=SSL_kEDH;
#endif

	if (dh_tmp_export) 
		emask|=SSL_kEDH;

	if (dh_tmp)
		mask|=SSL_kEDH;

	if (dh_rsa) mask|=SSL_kDHr;
	if (dh_rsa_export) emask|=SSL_kDHr;

	if (dh_dsa) mask|=SSL_kDHd;
	if (dh_dsa_export) emask|=SSL_kDHd;

	if (rsa_enc || rsa_sign)
		{
		mask|=SSL_aRSA;
		emask|=SSL_aRSA;
		}

	if (dsa_sign)
		{
		mask|=SSL_aDSS;
		emask|=SSL_aDSS;
		}

#ifdef SSL_ALLOW_ADH
	mask|=SSL_aNULL;
	emask|=SSL_aNULL;
#endif

	c->mask=mask;
	c->export_mask=emask;
	c->valid=1;
	}

/* THIS NEEDS CLEANING UP */
X509 *ssl_get_server_send_cert(SSL *s)
	{
	unsigned long alg,mask,kalg;
	CERT *c;
	int i,export;

	c=s->cert;
	ssl_set_cert_masks(c,s->ctx->default_cert,s->s3->tmp.new_cipher);
	alg=s->s3->tmp.new_cipher->algorithms;
	export=SSL_IS_EXPORT(alg);
	mask=export?c->export_mask:c->mask;
	kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);

	if 	(kalg & SSL_kDHr)
		i=SSL_PKEY_DH_RSA;
	else if (kalg & SSL_kDHd)
		i=SSL_PKEY_DH_DSA;
	else if (kalg & SSL_aDSS)
		i=SSL_PKEY_DSA_SIGN;
	else if (kalg & SSL_aRSA)
		{
		if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
			i=SSL_PKEY_RSA_SIGN;
		else
			i=SSL_PKEY_RSA_ENC;
		}
	else /* if (kalg & SSL_aNULL) */
		{
		SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
		return(NULL);
		}
	if (c->pkeys[i].x509 == NULL) return(NULL);
	return(c->pkeys[i].x509);
	}

EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
	{
	unsigned long alg;
	CERT *c;

	alg=cipher->algorithms;
	c=s->cert;

	if ((alg & SSL_aDSS) &&
		(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
		return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
	else if (alg & SSL_aRSA)
		{
		if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
			return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
		else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
			return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
		else
			return(NULL);
		}
	else /* if (alg & SSL_aNULL) */
		{
		SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
		return(NULL);
		}
	}

void ssl_update_cache(SSL *s,int mode)
	{
	int i;

	/* If the session_id_length is 0, we are not supposed to cache it,
	 * and it would be rather hard to do anyway :-) */
	if (s->session->session_id_length == 0) return;

	if ((s->ctx->session_cache_mode & mode)
		&& (!s->hit)
		&& SSL_CTX_add_session(s->ctx,s->session)
		&& (s->ctx->new_session_cb != NULL))
		{
		CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
		if (!s->ctx->new_session_cb(s,s->session))
			SSL_SESSION_free(s->session);
		}

	/* auto flush every 255 connections */
	i=s->ctx->session_cache_mode;
	if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
		((i & mode) == mode))
		{
		if (  (((mode & SSL_SESS_CACHE_CLIENT)
			?s->ctx->stats.sess_connect_good
			:s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
			{
			SSL_CTX_flush_sessions(s->ctx,time(NULL));
			}
		}
	}

SSL_METHOD *SSL_get_ssl_method(SSL *s)
	{
	return(s->method);
	}

int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
	{
	int conn= -1;
	int ret=1;

	if (s->method != meth)
		{
		if (s->handshake_func != NULL)
			conn=(s->handshake_func == s->method->ssl_connect);

		if (s->method->version == meth->version)
			s->method=meth;
		else
			{
			s->method->ssl_free(s);
			s->method=meth;
			ret=s->method->ssl_new(s);
			}

		if (conn == 1)
			s->handshake_func=meth->ssl_connect;
		else if (conn == 0)
			s->handshake_func=meth->ssl_accept;
		}
	return(ret);
	}

int SSL_get_error(SSL *s,int i)
	{
	int reason;
	unsigned long l;
	BIO *bio;

	if (i > 0) return(SSL_ERROR_NONE);

	/* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
	 * etc, where we do encode the error */
	if ((l=ERR_peek_error()) != 0)
		{
		if (ERR_GET_LIB(l) == ERR_LIB_SYS)
			return(SSL_ERROR_SYSCALL);
		else
			return(SSL_ERROR_SSL);
		}

	if ((i < 0) && SSL_want_read(s))
		{
		bio=SSL_get_rbio(s);
		if (BIO_should_read(bio))
			return(SSL_ERROR_WANT_READ);
		else if (BIO_should_write(bio))
			return(SSL_ERROR_WANT_WRITE);
		else if (BIO_should_io_special(bio))
			{
			reason=BIO_get_retry_reason(bio);
			if (reason == BIO_RR_CONNECT)
				return(SSL_ERROR_WANT_CONNECT);
			else
				return(SSL_ERROR_SYSCALL); /* unknown */
			}
		}

	if ((i < 0) && SSL_want_write(s))
		{
		bio=SSL_get_wbio(s);
		if (BIO_should_write(bio))
			return(SSL_ERROR_WANT_WRITE);
		else if (BIO_should_read(bio))
			return(SSL_ERROR_WANT_READ);
		else if (BIO_should_io_special(bio))
			{
			reason=BIO_get_retry_reason(bio);
			if (reason == BIO_RR_CONNECT)
				return(SSL_ERROR_WANT_CONNECT);
			else
				return(SSL_ERROR_SYSCALL);
			}
		}
	if ((i < 0) && SSL_want_x509_lookup(s))
		{
		return(SSL_ERROR_WANT_X509_LOOKUP);
		}

	if (i == 0)
		{
		if (s->version == SSL2_VERSION)
			{
			/* assume it is the socket being closed */
			return(SSL_ERROR_ZERO_RETURN);
			}
		else
			{
			if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
				(s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
				return(SSL_ERROR_ZERO_RETURN);
			}
		}
	return(SSL_ERROR_SYSCALL);
	}

int SSL_do_handshake(SSL *s)
	{
	int ret=1;

	if (s->handshake_func == NULL)
		{
		SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
		return(-1);
		}

	s->method->ssl_renegotiate_check(s);

	if (SSL_in_init(s) || SSL_in_before(s))
		{
		ret=s->handshake_func(s);
		}
	return(ret);
	}

/* For the next 2 functions, SSL_clear() sets shutdown and so
 * one of these calls will reset it */
void SSL_set_accept_state(SSL *s)
	{
	s->server=1;
	s->shutdown=0;
	s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
	s->handshake_func=s->method->ssl_accept;
	/* clear the current cipher */
	ssl_clear_cipher_ctx(s);
	}

void SSL_set_connect_state(SSL *s)
	{
	s->server=0;
	s->shutdown=0;
	s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
	s->handshake_func=s->method->ssl_connect;
	/* clear the current cipher */
	ssl_clear_cipher_ctx(s);
	}

int ssl_undefined_function(SSL *s)
	{
	SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	return(0);
	}

SSL_METHOD *ssl_bad_method(int ver)
	{
	SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
	return(NULL);
	}

char *SSL_get_version(SSL *s)
	{
	if (s->version == TLS1_VERSION)
		return("TLSv1");
	else if (s->version == SSL3_VERSION)
		return("SSLv3");
	else if (s->version == SSL2_VERSION)
		return("SSLv2");
	else
		return("unknown");
	}

SSL *SSL_dup(SSL *s)
        {
	STACK *sk;
	X509_NAME *xn;
        SSL *ret;
	int i;
		 
	if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
	    return(NULL);
			  
	/* This copies version, session-id, SSL_METHOD and 'cert' */
	SSL_copy_session_id(ret,s);

	SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
	SSL_set_verify(ret,SSL_get_verify_mode(s),
		SSL_get_verify_callback(s));

	SSL_set_info_callback(ret,SSL_get_info_callback(s));
	
	ret->debug=s->debug;
	ret->options=s->options;

	/* copy app data, a little dangerous perhaps */
	if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
		goto err;

	/* setup rbio, and wbio */
	if (s->rbio != NULL)
		{
		if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
			goto err;
		}
	if (s->wbio != NULL)
		{
		if (s->wbio != s->rbio)
			{
			if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
				goto err;
			}
		else
			ret->wbio=ret->rbio;
		}

	/* dup the cipher_list and cipher_list_by_id stacks */
	if (s->cipher_list != NULL)
		{
		if ((ret->cipher_list=sk_dup(s->cipher_list)) == NULL)
			goto err;
		}
	if (s->cipher_list_by_id != NULL)
		if ((ret->cipher_list_by_id=sk_dup(s->cipher_list_by_id))
			== NULL)
			goto err;

	/* Dup the client_CA list */
	if (s->client_CA != NULL)
		{
		if ((sk=sk_dup(s->client_CA)) == NULL) goto err;
		ret->client_CA=sk;
		for (i=0; i<sk_num(sk); i++)
			{
			xn=(X509_NAME *)sk_value(sk,i);
			if ((sk_value(sk,i)=(char *)X509_NAME_dup(xn)) == NULL)
				{
				X509_NAME_free(xn);
				goto err;
				}
			}
		}

	ret->shutdown=s->shutdown;
	ret->state=s->state;
	ret->handshake_func=s->handshake_func;
	ret->server=s->server;

	if (0)
		{
err:
		if (ret != NULL) SSL_free(ret);
		ret=NULL;
		}
	return(ret);
	}

void ssl_clear_cipher_ctx(SSL *s)
	{
        if (s->enc_read_ctx != NULL)
                {
                EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
                Free(s->enc_read_ctx);
                s->enc_read_ctx=NULL;
                }
        if (s->enc_write_ctx != NULL)
                {
                EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
                Free(s->enc_write_ctx);
                s->enc_write_ctx=NULL;
                }
	if (s->expand != NULL)
		{
		COMP_CTX_free(s->expand);
		s->expand=NULL;
		}
	if (s->compress != NULL)
		{
		COMP_CTX_free(s->compress);
		s->compress=NULL;
		}
	}

/* Fix this function so that it takes an optional type parameter */
X509 *SSL_get_certificate(SSL *s)
	{
	if (s->cert != NULL)
		return(s->cert->key->x509);
	else
		return(NULL);
	}

/* Fix this function so that it takes an optional type parameter */
EVP_PKEY *SSL_get_privatekey(SSL *s)
	{
	if (s->cert != NULL)
		return(s->cert->key->privatekey);
	else
		return(NULL);
	}

SSL_CIPHER *SSL_get_current_cipher(SSL *s)
	{
        if ((s->session != NULL) && (s->session->cipher != NULL))
                return(s->session->cipher);
        return(NULL);
	}

int ssl_init_wbio_buffer(SSL *s,int push)
	{
	BIO *bbio;

	if (s->bbio == NULL)
		{
		bbio=BIO_new(BIO_f_buffer());
		if (bbio == NULL) return(0);
		s->bbio=bbio;
		}
	else
		{
		bbio=s->bbio;
		if (s->bbio == s->wbio)
			s->wbio=BIO_pop(s->wbio);
		}
	BIO_reset(bbio);
/*	if (!BIO_set_write_buffer_size(bbio,16*1024)) */
	if (!BIO_set_read_buffer_size(bbio,1))
		{
		SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
		return(0);
		}
	if (push)
		{
		if (s->wbio != bbio)
			s->wbio=BIO_push(bbio,s->wbio);
		}
	else
		{
		if (s->wbio == bbio)
			s->wbio=BIO_pop(bbio);
		}
	return(1);
	}

void ssl_free_wbio_buffer(SSL *s)
	{
	BIO *under;

	if (s->bbio == NULL) return;

	if (s->bbio == s->wbio)
		{
		/* remove buffering */
		under=BIO_pop(s->wbio);
		if (under != NULL)
			s->wbio=under;
		else
			abort(); /* ok */
		}
	BIO_free(s->bbio);
	s->bbio=NULL;
	}
	
void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
	{
	ctx->quiet_shutdown=mode;
	}

int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
	{
	return(ctx->quiet_shutdown);
	}

void SSL_set_quiet_shutdown(SSL *s,int mode)
	{
	s->quiet_shutdown=mode;
	}

int SSL_get_quiet_shutdown(SSL *s)
	{
	return(s->quiet_shutdown);
	}

void SSL_set_shutdown(SSL *s,int mode)
	{
	s->shutdown=mode;
	}

int SSL_get_shutdown(SSL *s)
	{
	return(s->shutdown);
	}

int SSL_version(SSL *s)
	{
	return(s->version);
	}

SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
	{
	return(ssl->ctx);
	}

#ifndef NO_STDIO
int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
	{
	return(X509_STORE_set_default_paths(ctx->cert_store));
	}

int SSL_CTX_load_verify_locations(SSL_CTX *ctx,char *CAfile,char *CApath)
	{
	return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
	}
#endif

void SSL_set_info_callback(SSL *ssl,void (*cb)())
	{
	ssl->info_callback=cb;
	}

void (*SSL_get_info_callback(SSL *ssl))()
	{
	return((void (*)())ssl->info_callback);
	}

int SSL_state(SSL *ssl)
	{
	return(ssl->state);
	}

void SSL_set_verify_result(SSL *ssl,long arg)
	{
	ssl->verify_result=arg;
	}

long SSL_get_verify_result(SSL *ssl)
	{
	return(ssl->verify_result);
	}

int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
			 int (*dup_func)(),void (*free_func)())
        {
	ssl_meth_num++;
	return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
		&ssl_meth,argl,argp,new_func,dup_func,free_func));
        }

int SSL_set_ex_data(SSL *s,int idx,void *arg)
	{
	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
	}

void *SSL_get_ex_data(SSL *s,int idx)
	{
	return(CRYPTO_get_ex_data(&s->ex_data,idx));
	}

int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
			     int (*dup_func)(),void (*free_func)())
        {
	ssl_ctx_meth_num++;
	return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
		&ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
        }

int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
	{
	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
	}

void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
	{
	return(CRYPTO_get_ex_data(&s->ex_data,idx));
	}

int ssl_ok(SSL *s)
	{
	return(1);
	}

X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
	{
	return(ctx->cert_store);
	}

void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
	{
	if (ctx->cert_store != NULL)
		X509_STORE_free(ctx->cert_store);
	ctx->cert_store=store;
	}

int SSL_want(SSL *s)
	{
	return(s->rwstate);
	}

/*!
 * \brief Set the callback for generating temporary RSA keys.
 * \param ctx the SSL context.
 * \param cb the callback
 */

void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
							  int keylength))
    { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }

#ifdef DOXYGEN
/*!
 * \brief The RSA temporary key callback function.
 * \param ssl the SSL session.
 * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
 * \param keylength if \c export is \c TRUE, then \c keylength is the size of
 * the required key in bits.
 * \return the temporary RSA key.
 * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
 */

RSA *cb(SSL *ssl,int export,int keylength)
    {}
#endif

/*!
 * \brief Set the callback for generating temporary DH keys.
 * \param ctx the SSL context.
 * \param dh the callback
 */

void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
							int keylength))
    { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }

void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
							  int keylength))
    { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }

void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
							int keylength))
    { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }

#if defined(_WINDLL) && defined(WIN16)
#include "../crypto/bio/bss_file.c"
#endif