--- /dev/null
+/* ssl/ssl_comp.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.]
+ */
+
+#include <stdio.h>
+#include "ssl_locl.h"
+
+#ifndef NOPROTO
+static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
+static void SSL_SESSION_list_add(SSL_CTX *ctx,SSL_SESSION *s);
+#else
+static void SSL_SESSION_list_remove();
+static void SSL_SESSION_list_add();
+#endif
+
+static int ssl_session_num=0;
+static STACK *ssl_session_meth=NULL;
+
+SSL_SESSION *SSL_get_session(ssl)
+SSL *ssl;
+ {
+ return(ssl->session);
+ }
+
+int SSL_SESSION_get_ex_new_index(argl,argp,new_func,dup_func,free_func)
+long argl;
+char *argp;
+int (*new_func)();
+int (*dup_func)();
+void (*free_func)();
+ {
+ ssl_session_num++;
+ return(CRYPTO_get_ex_new_index(ssl_session_num-1,
+ &ssl_session_meth,
+ argl,argp,new_func,dup_func,free_func));
+ }
+
+int SSL_SESSION_set_ex_data(s,idx,arg)
+SSL_SESSION *s;
+int idx;
+char *arg;
+ {
+ return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
+ }
+
+char *SSL_SESSION_get_ex_data(s,idx)
+SSL_SESSION *s;
+int idx;
+ {
+ return(CRYPTO_get_ex_data(&s->ex_data,idx));
+ }
+
+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);
+ ss->prev=NULL;
+ ss->next=NULL;
+ CRYPTO_new_ex_data(ssl_session_meth,(char *)ss,&ss->ex_data);
+ 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=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
+ {
+ 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,session_id,len)
+SSL *s;
+unsigned char *session_id;
+int len;
+ {
+ SSL_SESSION *ret=NULL,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_id,len);;
+
+ if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP))
+ {
+ 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_id,len,©))
+ != 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>>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)
+ 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;
+ {
+ int ret=0;
+ 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);
+
+ /* Put on the end of the queue unless it is already in the cache */
+ if (s == NULL)
+ SSL_SESSION_list_add(ctx,c);
+
+ /* 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);
+ ret=0;
+ }
+ else
+ {
+ 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 (!SSL_CTX_remove_session(ctx,
+ ctx->session_cache_tail))
+ break;
+ else
+ ctx->sess_cache_full++;
+ }
+ }
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+ return(ret);
+ }
+
+int SSL_CTX_remove_session(ctx,c)
+SSL_CTX *ctx;
+SSL_SESSION *c;
+ {
+ SSL_SESSION *r;
+ int ret=0;
+
+ if ((c != NULL) && (c->session_id_length != 0))
+ {
+ CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+ r=(SSL_SESSION *)lh_delete(ctx->sessions,(char *)c);
+ if (r != NULL)
+ {
+ ret=1;
+ SSL_SESSION_list_remove(ctx,c);
+ }
+
+ 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(ss)
+SSL_SESSION *ss;
+ {
+ int i;
+
+ 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(ssl_session_meth,(char *)ss,&ss->ex_data);
+
+ 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;
+ }
+ else
+ {
+ if (s->session != NULL)
+ {
+ SSL_SESSION_free(s->session);
+ s->session=NULL;
+ }
+ }
+ return(ret);
+ }
+
+long SSL_SESSION_set_timeout(s,t)
+SSL_SESSION *s;
+long t;
+ {
+ if (s == NULL) return(0);
+ s->timeout=t;
+ return(1);
+ }
+
+long SSL_SESSION_get_timeout(s)
+SSL_SESSION *s;
+ {
+ if (s == NULL) return(0);
+ return(s->timeout);
+ }
+
+long SSL_SESSION_get_time(s)
+SSL_SESSION *s;
+ {
+ if (s == NULL) return(0);
+ return(s->time);
+ }
+
+long SSL_SESSION_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 */
+ {
+ /* The reason we don't call SSL_CTX_remove_session() is to
+ * save on locking overhead */
+ lh_delete(p->cache,(char *)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);
+ }
+ }
+
+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);
+ }
+
+/* locked by SSL_CTX in the calling function */
+static void SSL_SESSION_list_remove(ctx,s)
+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(ctx,s)
+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;
+ }
+ }
+
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