Initial import

1 files changed, 1102 insertions, 0 deletions

diff --git a/openssl/ssl/ssl_sess.c b/openssl/ssl/ssl_sess.c
new file mode 100644
index 00000000..93954e48
--- /dev/null
+++ b/openssl/ssl/ssl_sess.c
@@ -0,0 +1,1102 @@
+/* ssl/ssl_sess.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ * 
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ * 
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from 
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * 
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* ====================================================================
+ * Copyright 2005 Nokia. All rights reserved.
+ *
+ * The portions of the attached software ("Contribution") is developed by
+ * Nokia Corporation and is licensed pursuant to the OpenSSL open source
+ * license.
+ *
+ * The Contribution, originally written by Mika Kousa and Pasi Eronen of
+ * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
+ * support (see RFC 4279) to OpenSSL.
+ *
+ * No patent licenses or other rights except those expressly stated in
+ * the OpenSSL open source license shall be deemed granted or received
+ * expressly, by implication, estoppel, or otherwise.
+ *
+ * No assurances are provided by Nokia that the Contribution does not
+ * infringe the patent or other intellectual property rights of any third
+ * party or that the license provides you with all the necessary rights
+ * to make use of the Contribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
+ * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
+ * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
+ * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
+ * OTHERWISE.
+ */
+
+#include <stdio.h>
+#include <openssl/lhash.h>
+#include <openssl/rand.h>
+#ifndef OPENSSL_NO_ENGINE
+#include <openssl/engine.h>
+#endif
+#include "ssl_locl.h"
+
+static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
+static void SSL_SESSION_list_add(SSL_CTX *ctx,SSL_SESSION *s);
+static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
+
+SSL_SESSION *SSL_get_session(const SSL *ssl)
+/* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
+	{
+	return(ssl->session);
+	}
+
+SSL_SESSION *SSL_get1_session(SSL *ssl)
+/* variant of SSL_get_session: caller really gets something */
+	{
+	SSL_SESSION *sess;
+	/* Need to lock this all up rather than just use CRYPTO_add so that
+	 * somebody doesn't free ssl->session between when we check it's
+	 * non-null and when we up the reference count. */
+	CRYPTO_w_lock(CRYPTO_LOCK_SSL_SESSION);
+	sess = ssl->session;
+	if(sess)
+		sess->references++;
+	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_SESSION);
+	return(sess);
+	}
+
+int SSL_SESSION_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
+	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
+	{
+	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, argl, argp,
+			new_func, dup_func, free_func);
+	}
+
+int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
+	{
+	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
+	}
+
+void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
+	{
+	return(CRYPTO_get_ex_data(&s->ex_data,idx));
+	}
+
+SSL_SESSION *SSL_SESSION_new(void)
+	{
+	SSL_SESSION *ss;
+
+	ss=(SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION));
+	if (ss == NULL)
+		{
+		SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE);
+		return(0);
+		}
+	memset(ss,0,sizeof(SSL_SESSION));
+
+	ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
+	ss->references=1;
+	ss->timeout=60*5+4; /* 5 minute timeout by default */
+	ss->time=(unsigned long)time(NULL);
+	ss->prev=NULL;
+	ss->next=NULL;
+	ss->compress_meth=0;
+#ifndef OPENSSL_NO_TLSEXT
+	ss->tlsext_hostname = NULL; 
+#ifndef OPENSSL_NO_EC
+	ss->tlsext_ecpointformatlist_length = 0;
+	ss->tlsext_ecpointformatlist = NULL;
+	ss->tlsext_ellipticcurvelist_length = 0;
+	ss->tlsext_ellipticcurvelist = NULL;
+#endif
+#endif
+	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
+#ifndef OPENSSL_NO_PSK
+	ss->psk_identity_hint=NULL;
+	ss->psk_identity=NULL;
+#endif
+	return(ss);
+	}
+
+const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
+	{
+	if(len)
+		*len = s->session_id_length;
+	return s->session_id;
+	}
+
+/* Even with SSLv2, we have 16 bytes (128 bits) of session ID space. SSLv3/TLSv1
+ * has 32 bytes (256 bits). As such, filling the ID with random gunk repeatedly
+ * until we have no conflict is going to complete in one iteration pretty much
+ * "most" of the time (btw: understatement). So, if it takes us 10 iterations
+ * and we still can't avoid a conflict - well that's a reasonable point to call
+ * it quits. Either the RAND code is broken or someone is trying to open roughly
+ * very close to 2^128 (or 2^256) SSL sessions to our server. How you might
+ * store that many sessions is perhaps a more interesting question ... */
+
+#define MAX_SESS_ID_ATTEMPTS 10
+static int def_generate_session_id(const SSL *ssl, unsigned char *id,
+				unsigned int *id_len)
+{
+	unsigned int retry = 0;
+	do
+		if (RAND_pseudo_bytes(id, *id_len) <= 0)
+			return 0;
+	while(SSL_has_matching_session_id(ssl, id, *id_len) &&
+		(++retry < MAX_SESS_ID_ATTEMPTS));
+	if(retry < MAX_SESS_ID_ATTEMPTS)
+		return 1;
+	/* else - woops a session_id match */
+	/* XXX We should also check the external cache --
+	 * but the probability of a collision is negligible, and
+	 * we could not prevent the concurrent creation of sessions
+	 * with identical IDs since we currently don't have means
+	 * to atomically check whether a session ID already exists
+	 * and make a reservation for it if it does not
+	 * (this problem applies to the internal cache as well).
+	 */
+	return 0;
+}
+
+void SSL_set_session_creation_enabled (SSL *s, int creation_enabled)
+	{
+	s->session_creation_enabled = creation_enabled;
+	}
+
+int ssl_get_new_session(SSL *s, int session)
+	{
+	/* This gets used by clients and servers. */
+
+	unsigned int tmp;
+	SSL_SESSION *ss=NULL;
+	GEN_SESSION_CB cb = def_generate_session_id;
+
+	/* caller should check this if they can do better error handling */
+        if (!s->session_creation_enabled) return(0);
+	if ((ss=SSL_SESSION_new()) == NULL) return(0);
+
+	/* If the context has a default timeout, use it */
+	if (s->session_ctx->session_timeout == 0)
+		ss->timeout=SSL_get_default_timeout(s);
+	else
+		ss->timeout=s->session_ctx->session_timeout;
+
+	if (s->session != NULL)
+		{
+		SSL_SESSION_free(s->session);
+		s->session=NULL;
+		}
+
+	if (session)
+		{
+		if (s->version == SSL2_VERSION)
+			{
+			ss->ssl_version=SSL2_VERSION;
+			ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
+			}
+		else if (s->version == SSL3_VERSION)
+			{
+			ss->ssl_version=SSL3_VERSION;
+			ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
+			}
+		else if (s->version == TLS1_VERSION)
+			{
+			ss->ssl_version=TLS1_VERSION;
+			ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
+			}
+		else if (s->version == DTLS1_BAD_VER)
+			{
+			ss->ssl_version=DTLS1_BAD_VER;
+			ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
+			}
+		else if (s->version == DTLS1_VERSION)
+			{
+			ss->ssl_version=DTLS1_VERSION;
+			ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
+			}
+		else
+			{
+			SSLerr(SSL_F_SSL_GET_NEW_SESSION,SSL_R_UNSUPPORTED_SSL_VERSION);
+			SSL_SESSION_free(ss);
+			return(0);
+			}
+#ifndef OPENSSL_NO_TLSEXT
+		/* If RFC4507 ticket use empty session ID */
+		if (s->tlsext_ticket_expected)
+			{
+			ss->session_id_length = 0;
+			goto sess_id_done;
+			}
+#endif
+		/* Choose which callback will set the session ID */
+		CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
+		if(s->generate_session_id)
+			cb = s->generate_session_id;
+		else if(s->session_ctx->generate_session_id)
+			cb = s->session_ctx->generate_session_id;
+		CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
+		/* Choose a session ID */
+		tmp = ss->session_id_length;
+		if(!cb(s, ss->session_id, &tmp))
+			{
+			/* The callback failed */
+			SSLerr(SSL_F_SSL_GET_NEW_SESSION,
+				SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
+			SSL_SESSION_free(ss);
+			return(0);
+			}
+		/* Don't allow the callback to set the session length to zero.
+		 * nor set it higher than it was. */
+		if(!tmp || (tmp > ss->session_id_length))
+			{
+			/* The callback set an illegal length */
+			SSLerr(SSL_F_SSL_GET_NEW_SESSION,
+				SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
+			SSL_SESSION_free(ss);
+			return(0);
+			}
+		/* If the session length was shrunk and we're SSLv2, pad it */
+		if((tmp < ss->session_id_length) && (s->version == SSL2_VERSION))
+			memset(ss->session_id + tmp, 0, ss->session_id_length - tmp);
+		else
+			ss->session_id_length = tmp;
+		/* Finally, check for a conflict */
+		if(SSL_has_matching_session_id(s, ss->session_id,
+						ss->session_id_length))
+			{
+			SSLerr(SSL_F_SSL_GET_NEW_SESSION,
+				SSL_R_SSL_SESSION_ID_CONFLICT);
+			SSL_SESSION_free(ss);
+			return(0);
+			}
+#ifndef OPENSSL_NO_TLSEXT
+		sess_id_done:
+		if (s->tlsext_hostname) {
+			ss->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
+			if (ss->tlsext_hostname == NULL) {
+				SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
+				SSL_SESSION_free(ss);
+				return 0;
+				}
+			}
+#ifndef OPENSSL_NO_EC
+		if (s->tlsext_ecpointformatlist)
+			{
+			if (ss->tlsext_ecpointformatlist != NULL) OPENSSL_free(ss->tlsext_ecpointformatlist);
+			if ((ss->tlsext_ecpointformatlist = OPENSSL_malloc(s->tlsext_ecpointformatlist_length)) == NULL)
+				{
+				SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_FAILURE);
+				SSL_SESSION_free(ss);
+				return 0;
+				}
+			ss->tlsext_ecpointformatlist_length = s->tlsext_ecpointformatlist_length;
+			memcpy(ss->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
+			}
+		if (s->tlsext_ellipticcurvelist)
+			{
+			if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(ss->tlsext_ellipticcurvelist);
+			if ((ss->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
+				{
+				SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_MALLOC_FAILURE);
+				SSL_SESSION_free(ss);
+				return 0;
+				}
+			ss->tlsext_ellipticcurvelist_length = s->tlsext_ellipticcurvelist_length;
+			memcpy(ss->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
+			}
+#endif
+#endif
+		}
+	else
+		{
+		ss->session_id_length=0;
+		}
+
+	if (s->sid_ctx_length > sizeof ss->sid_ctx)
+		{
+		SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
+		SSL_SESSION_free(ss);
+		return 0;
+		}
+	memcpy(ss->sid_ctx,s->sid_ctx,s->sid_ctx_length);
+	ss->sid_ctx_length=s->sid_ctx_length;
+	s->session=ss;
+	ss->ssl_version=s->version;
+	ss->verify_result = X509_V_OK;
+
+	return(1);
+	}
+
+int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len,
+			const unsigned char *limit)
+	{
+	/* This is used only by servers. */
+
+	SSL_SESSION *ret=NULL;
+	int fatal = 0;
+#ifndef OPENSSL_NO_TLSEXT
+	int r;
+#endif
+
+	if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
+		goto err;
+#ifndef OPENSSL_NO_TLSEXT
+	r = tls1_process_ticket(s, session_id, len, limit, &ret);
+	if (r == -1)
+		{
+		fatal = 1;
+		goto err;
+		}
+	else if (r == 0 || (!ret && !len))
+		goto err;
+	else if (!ret && !(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
+#else
+	if (len == 0)
+		goto err;
+	if (!(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
+#endif
+		{
+		SSL_SESSION data;
+		data.ssl_version=s->version;
+		data.session_id_length=len;
+		if (len == 0)
+			return 0;
+		memcpy(data.session_id,session_id,len);
+		CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
+		ret=lh_SSL_SESSION_retrieve(s->session_ctx->sessions,&data);
+		if (ret != NULL)
+		    /* don't allow other threads to steal it: */
+		    CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
+		CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
+		}
+
+	if (ret == NULL)
+		{
+		int copy=1;
+	
+		s->session_ctx->stats.sess_miss++;
+		ret=NULL;
+		if (s->session_ctx->get_session_cb != NULL
+		    && (ret=s->session_ctx->get_session_cb(s,session_id,len,&copy))
+		       != NULL)
+			{
+			s->session_ctx->stats.sess_cb_hit++;
+
+			/* Increment reference count now if the session callback
+			 * asks us to do so (note that if the session structures
+			 * returned by the callback are shared between threads,
+			 * it must handle the reference count itself [i.e. copy == 0],
+			 * or things won't be thread-safe). */
+			if (copy)
+				CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
+
+			/* Add the externally cached session to the internal
+			 * cache as well if and only if we are supposed to. */
+			if(!(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE))
+				/* The following should not return 1, otherwise,
+				 * things are very strange */
+				SSL_CTX_add_session(s->session_ctx,ret);
+			}
+		if (ret == NULL)
+			goto err;
+		}
+
+	/* Now ret is non-NULL, and we own one of its reference counts. */
+
+	if (ret->sid_ctx_length != s->sid_ctx_length
+	    || memcmp(ret->sid_ctx,s->sid_ctx,ret->sid_ctx_length))
+		{
+		/* We've found the session named by the client, but we don't
+		 * want to use it in this context. */
+
+#if 0 /* The client cannot always know when a session is not appropriate,
+       * so we shouldn't generate an error message. */
+
+		SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
+#endif
+		goto err; /* treat like cache miss */
+		}
+	
+	if((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0)
+		{
+		/* We can't be sure if this session is being used out of
+		 * context, which is especially important for SSL_VERIFY_PEER.
+		 * The application should have used SSL[_CTX]_set_session_id_context.
+		 *
+		 * For this error case, we generate an error instead of treating
+		 * the event like a cache miss (otherwise it would be easy for
+		 * applications to effectively disable the session cache by
+		 * accident without anyone noticing).
+		 */
+		
+		SSLerr(SSL_F_SSL_GET_PREV_SESSION,SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
+		fatal = 1;
+		goto err;
+		}
+
+	if (ret->cipher == NULL)
+		{
+		unsigned char buf[5],*p;
+		unsigned long l;
+
+		p=buf;
+		l=ret->cipher_id;
+		l2n(l,p);
+		if ((ret->ssl_version>>8) >= SSL3_VERSION_MAJOR)
+			ret->cipher=ssl_get_cipher_by_char(s,&(buf[2]));
+		else 
+			ret->cipher=ssl_get_cipher_by_char(s,&(buf[1]));
+		if (ret->cipher == NULL)
+			goto err;
+		}
+
+
+#if 0 /* This is way too late. */
+
+	/* If a thread got the session, then 'swaped', and another got
+	 * it and then due to a time-out decided to 'OPENSSL_free' it we could
+	 * be in trouble.  So I'll increment it now, then double decrement
+	 * later - am I speaking rubbish?. */
+	CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
+#endif
+
+	if (ret->timeout < (long)(time(NULL) - ret->time)) /* timeout */
+		{
+		s->session_ctx->stats.sess_timeout++;
+		/* remove it from the cache */
+		SSL_CTX_remove_session(s->session_ctx,ret);
+		goto err;
+		}
+
+	s->session_ctx->stats.sess_hit++;
+
+	/* ret->time=time(NULL); */ /* rezero timeout? */
+	/* again, just leave the session 
+	 * if it is the same session, we have just incremented and
+	 * then decremented the reference count :-) */
+	if (s->session != NULL)
+		SSL_SESSION_free(s->session);
+	s->session=ret;
+	s->verify_result = s->session->verify_result;
+	return(1);
+
+ err:
+	if (ret != NULL)
+		SSL_SESSION_free(ret);
+	if (fatal)
+		return -1;
+	else
+		return 0;
+	}
+
+int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
+	{
+	int ret=0;
+	SSL_SESSION *s;
+
+	/* add just 1 reference count for the SSL_CTX's session cache
+	 * even though it has two ways of access: each session is in a
+	 * doubly linked list and an lhash */
+	CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION);
+	/* if session c is in already in cache, we take back the increment later */
+
+	CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+	s=lh_SSL_SESSION_insert(ctx->sessions,c);
+	
+	/* s != NULL iff we already had a session with the given PID.
+	 * In this case, s == c should hold (then we did not really modify
+	 * ctx->sessions), or we're in trouble. */
+	if (s != NULL && s != c)
+		{
+		/* We *are* in trouble ... */
+		SSL_SESSION_list_remove(ctx,s);
+		SSL_SESSION_free(s);
+		/* ... so pretend the other session did not exist in cache
+		 * (we cannot handle two SSL_SESSION structures with identical
+		 * session ID in the same cache, which could happen e.g. when
+		 * two threads concurrently obtain the same session from an external
+		 * cache) */
+		s = NULL;
+		}
+
+ 	/* Put at the head of the queue unless it is already in the cache */
+	if (s == NULL)
+		SSL_SESSION_list_add(ctx,c);
+
+	if (s != NULL)
+		{
+		/* existing cache entry -- decrement previously incremented reference
+		 * count because it already takes into account the cache */
+
+		SSL_SESSION_free(s); /* s == c */
+		ret=0;
+		}
+	else
+		{
+		/* new cache entry -- remove old ones if cache has become too large */
+		
+		ret=1;
+
+		if (SSL_CTX_sess_get_cache_size(ctx) > 0)
+			{
+			while (SSL_CTX_sess_number(ctx) >
+				SSL_CTX_sess_get_cache_size(ctx))
+				{
+				if (!remove_session_lock(ctx,
+					ctx->session_cache_tail, 0))
+					break;
+				else
+					ctx->stats.sess_cache_full++;
+				}
+			}
+		}
+	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+	return(ret);
+	}
+
+int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
+{
+	return remove_session_lock(ctx, c, 1);
+}
+
+static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
+	{
+	SSL_SESSION *r;
+	int ret=0;
+
+	if ((c != NULL) && (c->session_id_length != 0))
+		{
+		if(lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+		if ((r = lh_SSL_SESSION_retrieve(ctx->sessions,c)) == c)
+			{
+			ret=1;
+			r=lh_SSL_SESSION_delete(ctx->sessions,c);
+			SSL_SESSION_list_remove(ctx,c);
+			}
+
+		if(lck) CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+
+		if (ret)
+			{
+			r->not_resumable=1;
+			if (ctx->remove_session_cb != NULL)
+				ctx->remove_session_cb(ctx,r);
+			SSL_SESSION_free(r);
+			}
+		}
+	else
+		ret=0;
+	return(ret);
+	}
+
+void SSL_SESSION_free(SSL_SESSION *ss)
+	{
+	int i;
+
+	if(ss == NULL)
+	    return;
+
+	i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION);
+#ifdef REF_PRINT
+	REF_PRINT("SSL_SESSION",ss);
+#endif
+	if (i > 0) return;
+#ifdef REF_CHECK
+	if (i < 0)
+		{
+		fprintf(stderr,"SSL_SESSION_free, bad reference count\n");
+		abort(); /* ok */
+		}
+#endif
+
+	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
+
+	OPENSSL_cleanse(ss->key_arg,sizeof ss->key_arg);
+	OPENSSL_cleanse(ss->master_key,sizeof ss->master_key);
+	OPENSSL_cleanse(ss->session_id,sizeof ss->session_id);
+	if (ss->sess_cert != NULL) ssl_sess_cert_free(ss->sess_cert);
+	if (ss->peer != NULL) X509_free(ss->peer);
+	if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers);
+#ifndef OPENSSL_NO_TLSEXT
+	if (ss->tlsext_hostname != NULL) OPENSSL_free(ss->tlsext_hostname);
+	if (ss->tlsext_tick != NULL) OPENSSL_free(ss->tlsext_tick);
+#ifndef OPENSSL_NO_EC
+	ss->tlsext_ecpointformatlist_length = 0;
+	if (ss->tlsext_ecpointformatlist != NULL) OPENSSL_free(ss->tlsext_ecpointformatlist);
+	ss->tlsext_ellipticcurvelist_length = 0;
+	if (ss->tlsext_ellipticcurvelist != NULL) OPENSSL_free(ss->tlsext_ellipticcurvelist);
+#endif /* OPENSSL_NO_EC */
+#endif
+#ifndef OPENSSL_NO_PSK
+	if (ss->psk_identity_hint != NULL)
+		OPENSSL_free(ss->psk_identity_hint);
+	if (ss->psk_identity != NULL)
+		OPENSSL_free(ss->psk_identity);
+#endif
+	OPENSSL_cleanse(ss,sizeof(*ss));
+	OPENSSL_free(ss);
+	}
+
+int SSL_set_session(SSL *s, SSL_SESSION *session)
+	{
+	int ret=0;
+	const SSL_METHOD *meth;
+
+	if (session != NULL)
+		{
+		meth=s->ctx->method->get_ssl_method(session->ssl_version);
+		if (meth == NULL)
+			meth=s->method->get_ssl_method(session->ssl_version);
+		if (meth == NULL)
+			{
+			SSLerr(SSL_F_SSL_SET_SESSION,SSL_R_UNABLE_TO_FIND_SSL_METHOD);
+			return(0);
+			}
+
+		if (meth != s->method)
+			{
+			if (!SSL_set_ssl_method(s,meth))
+				return(0);
+			if (s->ctx->session_timeout == 0)
+				session->timeout=SSL_get_default_timeout(s);
+			else
+				session->timeout=s->ctx->session_timeout;
+			}
+
+#ifndef OPENSSL_NO_KRB5
+                if (s->kssl_ctx && !s->kssl_ctx->client_princ &&
+                    session->krb5_client_princ_len > 0)
+                {
+                    s->kssl_ctx->client_princ = (char *)OPENSSL_malloc(session->krb5_client_princ_len + 1);
+                    memcpy(s->kssl_ctx->client_princ,session->krb5_client_princ,
+                            session->krb5_client_princ_len);
+                    s->kssl_ctx->client_princ[session->krb5_client_princ_len] = '\0';
+                }
+#endif /* OPENSSL_NO_KRB5 */
+
+		/* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
+		CRYPTO_add(&session->references,1,CRYPTO_LOCK_SSL_SESSION);
+		if (s->session != NULL)
+			SSL_SESSION_free(s->session);
+		s->session=session;
+		s->verify_result = s->session->verify_result;
+		/* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
+		ret=1;
+		}
+	else
+		{
+		if (s->session != NULL)
+			{
+			SSL_SESSION_free(s->session);
+			s->session=NULL;
+			}
+
+		meth=s->ctx->method;
+		if (meth != s->method)
+			{
+			if (!SSL_set_ssl_method(s,meth))
+				return(0);
+			}
+		ret=1;
+		}
+	return(ret);
+	}
+
+long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
+	{
+	if (s == NULL) return(0);
+	s->timeout=t;
+	return(1);
+	}
+
+long SSL_SESSION_get_timeout(const SSL_SESSION *s)
+	{
+	if (s == NULL) return(0);
+	return(s->timeout);
+	}
+
+long SSL_SESSION_get_time(const SSL_SESSION *s)
+	{
+	if (s == NULL) return(0);
+	return(s->time);
+	}
+
+long SSL_SESSION_set_time(SSL_SESSION *s, long t)
+	{
+	if (s == NULL) return(0);
+	s->time=t;
+	return(t);
+	}
+
+long SSL_CTX_set_timeout(SSL_CTX *s, long t)
+	{
+	long l;
+	if (s == NULL) return(0);
+	l=s->session_timeout;
+	s->session_timeout=t;
+	return(l);
+	}
+
+long SSL_CTX_get_timeout(const SSL_CTX *s)
+	{
+	if (s == NULL) return(0);
+	return(s->session_timeout);
+	}
+
+#ifndef OPENSSL_NO_TLSEXT
+int SSL_set_session_secret_cb(SSL *s, int (*tls_session_secret_cb)(SSL *s, void *secret, int *secret_len,
+	STACK_OF(SSL_CIPHER) *peer_ciphers, SSL_CIPHER **cipher, void *arg), void *arg)
+	{
+	if (s == NULL) return(0);
+	s->tls_session_secret_cb = tls_session_secret_cb;
+	s->tls_session_secret_cb_arg = arg;
+	return(1);
+	}
+
+int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb,
+				  void *arg)
+	{
+	if (s == NULL) return(0);
+	s->tls_session_ticket_ext_cb = cb;
+	s->tls_session_ticket_ext_cb_arg = arg;
+	return(1);
+	}
+
+int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len)
+	{
+	if (s->version >= TLS1_VERSION)
+		{
+		if (s->tlsext_session_ticket)
+			{
+			OPENSSL_free(s->tlsext_session_ticket);
+			s->tlsext_session_ticket = NULL;
+			}
+
+		s->tlsext_session_ticket = OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len);
+		if (!s->tlsext_session_ticket)
+			{
+			SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE);
+			return 0;
+			}
+
+		if (ext_data)
+			{
+			s->tlsext_session_ticket->length = ext_len;
+			s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1;
+			memcpy(s->tlsext_session_ticket->data, ext_data, ext_len);
+			}
+		else
+			{
+			s->tlsext_session_ticket->length = 0;
+			s->tlsext_session_ticket->data = NULL;
+			}
+
+		return 1;
+		}
+
+	return 0;
+	}
+#endif /* OPENSSL_NO_TLSEXT */
+
+typedef struct timeout_param_st
+	{
+	SSL_CTX *ctx;
+	long time;
+	LHASH_OF(SSL_SESSION) *cache;
+	} TIMEOUT_PARAM;
+
+static void timeout_doall_arg(SSL_SESSION *s, TIMEOUT_PARAM *p)
+	{
+	if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */
+		{
+		/* The reason we don't call SSL_CTX_remove_session() is to
+		 * save on locking overhead */
+		(void)lh_SSL_SESSION_delete(p->cache,s);
+		SSL_SESSION_list_remove(p->ctx,s);
+		s->not_resumable=1;
+		if (p->ctx->remove_session_cb != NULL)
+			p->ctx->remove_session_cb(p->ctx,s);
+		SSL_SESSION_free(s);
+		}
+	}
+
+static IMPLEMENT_LHASH_DOALL_ARG_FN(timeout, SSL_SESSION, TIMEOUT_PARAM)
+
+void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
+	{
+	unsigned long i;
+	TIMEOUT_PARAM tp;
+
+	tp.ctx=s;
+	tp.cache=s->sessions;
+	if (tp.cache == NULL) return;
+	tp.time=t;
+	CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+	i=CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load;
+	CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load=0;
+	lh_SSL_SESSION_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout),
+				 TIMEOUT_PARAM, &tp);
+	CHECKED_LHASH_OF(SSL_SESSION, tp.cache)->down_load=i;
+	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+	}
+
+int ssl_clear_bad_session(SSL *s)
+	{
+	if (	(s->session != NULL) &&
+		!(s->shutdown & SSL_SENT_SHUTDOWN) &&
+		!(SSL_in_init(s) || SSL_in_before(s)))
+		{
+		SSL_CTX_remove_session(s->ctx,s->session);
+		return(1);
+		}
+	else
+		return(0);
+	}
+
+/* locked by SSL_CTX in the calling function */
+static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
+	{
+	if ((s->next == NULL) || (s->prev == NULL)) return;
+
+	if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail))
+		{ /* last element in list */
+		if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
+			{ /* only one element in list */
+			ctx->session_cache_head=NULL;
+			ctx->session_cache_tail=NULL;
+			}
+		else
+			{
+			ctx->session_cache_tail=s->prev;
+			s->prev->next=(SSL_SESSION *)&(ctx->session_cache_tail);
+			}
+		}
+	else
+		{
+		if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head))
+			{ /* first element in list */
+			ctx->session_cache_head=s->next;
+			s->next->prev=(SSL_SESSION *)&(ctx->session_cache_head);
+			}
+		else
+			{ /* middle of list */
+			s->next->prev=s->prev;
+			s->prev->next=s->next;
+			}
+		}
+	s->prev=s->next=NULL;
+	}
+
+static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
+	{
+	if ((s->next != NULL) && (s->prev != NULL))
+		SSL_SESSION_list_remove(ctx,s);
+
+	if (ctx->session_cache_head == NULL)
+		{
+		ctx->session_cache_head=s;
+		ctx->session_cache_tail=s;
+		s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
+		s->next=(SSL_SESSION *)&(ctx->session_cache_tail);
+		}
+	else
+		{
+		s->next=ctx->session_cache_head;
+		s->next->prev=s;
+		s->prev=(SSL_SESSION *)&(ctx->session_cache_head);
+		ctx->session_cache_head=s;
+		}
+	}
+
+void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
+	int (*cb)(struct ssl_st *ssl,SSL_SESSION *sess))
+	{
+	ctx->new_session_cb=cb;
+	}
+
+int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(SSL *ssl, SSL_SESSION *sess)
+	{
+	return ctx->new_session_cb;
+	}
+
+void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
+	void (*cb)(SSL_CTX *ctx,SSL_SESSION *sess))
+	{
+	ctx->remove_session_cb=cb;
+	}
+
+void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(SSL_CTX * ctx,SSL_SESSION *sess)
+	{
+	return ctx->remove_session_cb;
+	}
+
+void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
+	SSL_SESSION *(*cb)(struct ssl_st *ssl,
+	         unsigned char *data,int len,int *copy))
+	{
+	ctx->get_session_cb=cb;
+	}
+
+SSL_SESSION * (*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(SSL *ssl,
+	         unsigned char *data,int len,int *copy)
+	{
+	return ctx->get_session_cb;
+	}
+
+void SSL_CTX_set_info_callback(SSL_CTX *ctx, 
+	void (*cb)(const SSL *ssl,int type,int val))
+	{
+	ctx->info_callback=cb;
+	}
+
+void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl,int type,int val)
+	{
+	return ctx->info_callback;
+	}
+
+void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
+	int (*cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey))
+	{
+	ctx->client_cert_cb=cb;
+	}
+
+int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL * ssl, X509 ** x509 , EVP_PKEY **pkey)
+	{
+	return ctx->client_cert_cb;
+	}
+
+#ifndef OPENSSL_NO_ENGINE
+int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e)
+	{
+	if (!ENGINE_init(e))
+		{
+		SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB);
+		return 0;
+		}
+	if(!ENGINE_get_ssl_client_cert_function(e))
+		{
+		SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, SSL_R_NO_CLIENT_CERT_METHOD);
+		ENGINE_finish(e);
+		return 0;
+		}
+	ctx->client_cert_engine = e;
+	return 1;
+	}
+#endif
+
+void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
+	int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len))
+	{
+	ctx->app_gen_cookie_cb=cb;
+	}
+
+void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
+	int (*cb)(SSL *ssl, unsigned char *cookie, unsigned int cookie_len))
+	{
+	ctx->app_verify_cookie_cb=cb;
+	}
+
+IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION)