1 files changed, 425 insertions, 0 deletions

diff --git a/ssl/ssl_sess.c b/ssl/ssl_sess.c
new file mode 100644
index 0000000000..af65c65dac
--- /dev/null
+++ b/ssl/ssl_sess.c
@@ -0,0 +1,425 @@
+/* ssl/ssl_sess.c */
+/* Copyright (C) 1995-1997 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.]
+ */
+
+#include <stdio.h>
+#include "lhash.h"
+#include "rand.h"
+#include "ssl_locl.h"
+
+SSL_SESSION *SSL_SESSION_new()
+	{
+	SSL_SESSION *ss;
+
+	ss=(SSL_SESSION *)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->references=1;
+	ss->timeout=60*5+4; /* 5 minute timeout by default */
+	ss->time=time(NULL);
+	return(ss);
+	}
+
+int ssl_get_new_session(s, session)
+SSL *s;
+int session;
+	{
+	SSL_SESSION *ss=NULL;
+
+	if ((ss=SSL_SESSION_new()) == NULL) return(0);
+
+	/* If the context has a default timeout, use it */
+	if (s->ctx->session_timeout != 0)
+		ss->timeout=SSL_get_default_timeout(s);
+
+	if (s->session != NULL)
+		{
+		SSL_SESSION_free(s->session);
+		s->session=NULL;
+		}
+
+	if (session)
+		{
+		if (s->version == SSL2_CLIENT_VERSION)
+			{
+			ss->ssl_version=2;
+			ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
+			}
+		else if (s->version == SSL3_VERSION_MAJOR)
+			{
+			ss->ssl_version=3;
+			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);
+			}
+
+		for (;;)
+			{
+			SSL_SESSION *r;
+
+			RAND_bytes(ss->session_id,ss->session_id_length);
+			CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
+			r=(SSL_SESSION *)lh_retrieve(s->ctx->sessions,
+				(char *)ss);
+			CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
+			if (r == NULL) break;
+			/* else - woops a session_id match */
+			}
+		}
+	else
+		{
+		ss->session_id_length=0;
+		}
+
+	s->session=ss;
+	ss->ssl_version=s->version;
+
+	return(1);
+	}
+
+int ssl_get_prev_session(s, len, session)
+SSL *s;
+int len;
+unsigned char *session;
+	{
+	SSL_SESSION *ret,data;
+
+	/* conn_init();*/
+	data.ssl_version=s->version;
+	data.session_id_length=len;
+	if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
+		return(0);
+	memcpy(data.session_id,session,len);;
+
+	CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
+	ret=(SSL_SESSION *)lh_retrieve(s->ctx->sessions,(char *)&data);
+	CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
+
+	if (ret == NULL)
+		{
+		int copy=1;
+
+		s->ctx->sess_miss++;
+		ret=NULL;
+		if ((s->ctx->get_session_cb != NULL) &&
+			((ret=s->ctx->get_session_cb(s,session,len,&copy))
+				!= NULL))
+			{
+			s->ctx->sess_cb_hit++;
+
+			/* The following should not return 1, otherwise,
+			 * things are very strange */
+			SSL_CTX_add_session(s->ctx,ret);
+			/* auto free it */
+			if (!copy)
+				SSL_SESSION_free(ret);
+			}
+		if (ret == NULL) return(0);
+		}
+
+	if (ret->cipher == NULL)
+		{
+		char buf[5],*p;
+		unsigned long l;
+
+		p=buf;
+		l=ret->cipher_id;
+		l2n(l,p);
+		if (ret->ssl_version == 3)
+			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)
+			return(0);
+		}
+
+	/* If a thread got the session, then 'swaped', and another got
+	 * it and then due to a time-out decided to '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);
+
+	if ((long)(ret->time+ret->timeout) < (long)time(NULL)) /* timeout */
+		{
+		s->ctx->sess_timeout++;
+		/* remove it from the cache */
+		SSL_CTX_remove_session(s->ctx,ret);
+		SSL_SESSION_free(ret);		/* again to actually Free it */
+		return(0);
+		}
+
+	s->ctx->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;
+	return(1);
+	}
+
+int SSL_CTX_add_session(ctx,c)
+SSL_CTX *ctx;
+SSL_SESSION *c;
+	{
+	SSL_SESSION *s;
+
+	/* conn_init(); */
+	CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION);
+
+	CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+	s=(SSL_SESSION *)lh_insert(ctx->sessions,(char *)c);
+	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+
+	/* If the same session if is being 're-added', Free the old
+	 * one when the last person stops using it.
+	 * This will also work if it is alread in the cache.
+	 * The references will go up and then down :-) */
+	if (s != NULL)
+		{
+		SSL_SESSION_free(s);
+		return(0);
+		}
+	else
+		return(1);
+	}
+
+int SSL_CTX_remove_session(ctx,c)
+SSL_CTX *ctx;
+SSL_SESSION *c;
+	{
+	SSL_SESSION *r;
+	int ret=0;
+
+	if ((c->session_id_length != 0) && (c != NULL))
+		{
+		CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+		r=(SSL_SESSION *)lh_delete(ctx->sessions,(char *)c);
+		if (r != NULL) ret=1;
+
+		CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+
+		if (ret)
+			{
+			r->not_resumable=1;
+			if (ctx->remove_session_cb != NULL)
+				ctx->remove_session_cb(ctx,c);
+			SSL_SESSION_free(r);
+			}
+		}
+	else
+		ret=0;
+	return(ret);
+	}
+
+void SSL_SESSION_free(ss)
+SSL_SESSION *ss;
+	{
+	int i;
+
+	i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION);
+	if (i > 0) return;
+#ifdef REF_CHECK
+	if (i < 0)
+		{
+		fprintf(stderr,"SSL_SESSION_free, bad reference count\n");
+		abort(); /* ok */
+		}
+#endif
+
+	memset(ss->key_arg,0,SSL_MAX_KEY_ARG_LENGTH);
+	memset(ss->master_key,0,SSL_MAX_MASTER_KEY_LENGTH);
+	memset(ss->session_id,0,SSL_MAX_SSL_SESSION_ID_LENGTH);
+	if (ss->cert != NULL) ssl_cert_free(ss->cert);
+	if (ss->peer != NULL) X509_free(ss->peer);
+	if (ss->ciphers != NULL) sk_free(ss->ciphers);
+	memset(ss,0,sizeof(*ss));
+	Free(ss);
+	}
+
+int SSL_set_session(s, session)
+SSL *s;
+SSL_SESSION *session;
+	{
+	int ret=0;
+	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);
+			session->timeout=SSL_get_default_timeout(s);
+			}
+
+		/* 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;
+		/* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
+		ret=1;
+		}
+	return(ret);
+	}
+
+long SSL_set_timeout(s,t)
+SSL_SESSION *s;
+long t;
+	{
+	if (s == NULL) return(0);
+	s->timeout=t;
+	return(1);
+	}
+
+long SSL_get_timeout(s)
+SSL_SESSION *s;
+	{
+	if (s == NULL) return(0);
+	return(s->timeout);
+	}
+
+long SSL_get_time(s)
+SSL_SESSION *s;
+	{
+	if (s == NULL) return(0);
+	return(s->time);
+	}
+
+long SSL_set_time(s,t)
+SSL_SESSION *s;
+long t;
+	{
+	if (s == NULL) return(0);
+	s->time=t;
+	return(t);
+	}
+
+typedef struct timeout_param_st
+	{
+	SSL_CTX *ctx;
+	long time;
+	LHASH *cache;
+	} TIMEOUT_PARAM;
+
+static void timeout(s,p)
+SSL_SESSION *s;
+TIMEOUT_PARAM *p;
+	{
+	if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */
+		{
+		lh_delete(p->cache,(char *)s);
+		s->not_resumable=1;
+		if (p->ctx->remove_session_cb != NULL)
+			p->ctx->remove_session_cb(p->ctx,s);
+		SSL_SESSION_free(s);
+		}
+	}
+
+void SSL_CTX_flush_sessions(s,t)
+SSL_CTX *s;
+long t;
+	{
+	unsigned long i;
+	TIMEOUT_PARAM tp;
+
+	tp.ctx=s;
+	tp.cache=SSL_CTX_sessions(s);
+	if (tp.cache == NULL) return;
+	tp.time=t;
+	CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+	i=tp.cache->down_load;
+	tp.cache->down_load=0;
+	lh_doall_arg(tp.cache,(void (*)())timeout,(char *)&tp);
+	tp.cache->down_load=i;
+	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+	}
+
+int ssl_clear_bad_session(s)
+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);
+	}