/* ssl/ssl_sess.c */
-/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
*/
#include <stdio.h>
-#include "lhash.h"
-#include "rand.h"
+#include <openssl/lhash.h>
+#include <openssl/rand.h>
#include "ssl_locl.h"
-SSL_SESSION *SSL_SESSION_new()
+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 *)Malloc(sizeof(SSL_SESSION));
+ ss=(SSL_SESSION *)OPENSSL_malloc(sizeof(SSL_SESSION));
if (ss == NULL)
{
SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE);
}
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=time(NULL);
+ ss->prev=NULL;
+ ss->next=NULL;
+ ss->compress_meth=0;
+ CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
return(ss);
}
-int ssl_get_new_session(s, session)
-SSL *s;
-int session;
+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;
+}
+
+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;
if ((ss=SSL_SESSION_new()) == NULL) return(0);
/* If the context has a default timeout, use it */
- if (s->ctx->session_timeout != 0)
+ if (s->ctx->session_timeout == 0)
ss->timeout=SSL_get_default_timeout(s);
+ else
+ ss->timeout=s->ctx->session_timeout;
if (s->session != NULL)
{
if (session)
{
- if (s->version == SSL2_CLIENT_VERSION)
+ if (s->version == SSL2_VERSION)
{
- ss->ssl_version=2;
+ ss->ssl_version=SSL2_VERSION;
ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
}
- else if (s->version == SSL3_VERSION_MAJOR)
+ else if (s->version == SSL3_VERSION)
{
- ss->ssl_version=3;
+ 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_VERSION)
+ {
+ ss->ssl_version=DTLS1_VERSION;
ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
}
else
SSL_SESSION_free(ss);
return(0);
}
-
- for (;;)
+ /* 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->ctx->generate_session_id)
+ cb = s->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))
{
- 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 */
+ SSLerr(SSL_F_SSL_GET_NEW_SESSION,
+ SSL_R_SSL_SESSION_ID_CONFLICT);
+ SSL_SESSION_free(ss);
+ return(0);
}
}
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(s, len, session)
-SSL *s;
-int len;
-unsigned char *session;
+int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len)
{
- SSL_SESSION *ret,data;
+ /* This is used only by servers. */
+
+ SSL_SESSION *ret=NULL,data;
+ int fatal = 0;
- /* 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);;
+ goto err;
+ memcpy(data.session_id,session_id,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 (!(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,&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->ctx->sess_miss++;
+
+ s->ctx->stats.sess_miss++;
ret=NULL;
- if ((s->ctx->get_session_cb != NULL) &&
- ((ret=s->ctx->get_session_cb(s,session,len,©))
- != NULL))
+ if (s->ctx->get_session_cb != NULL
+ && (ret=s->ctx->get_session_cb(s,session_id,len,©))
+ != NULL)
+ {
+ s->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->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->ctx,ret);
+ }
+ if (ret == NULL)
+ goto err;
+ }
+
+ /* Now ret is non-NULL, and we own one of its reference counts. */
+
+ if((s->verify_mode&SSL_VERIFY_PEER)
+ && (!s->sid_ctx_length || 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 (s->sid_ctx_length == 0)
{
- 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);
+ /* application should have used SSL[_CTX]_set_session_id_context
+ * -- we could tolerate this and just pretend we never heard
+ * of this session, but then applications could 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;
+ }
+ else
+ {
+#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 (ret == NULL) return(0);
}
if (ret->cipher == NULL)
{
- char buf[5],*p;
+ unsigned char buf[5],*p;
unsigned long l;
p=buf;
l=ret->cipher_id;
l2n(l,p);
- if (ret->ssl_version == 3)
+ 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);
+ 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 'Free' it we could
+ * 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 ((long)(ret->time+ret->timeout) < (long)time(NULL)) /* timeout */
{
- s->ctx->sess_timeout++;
+ s->ctx->stats.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);
+ goto err;
}
- s->ctx->sess_hit++;
+ s->ctx->stats.sess_hit++;
/* ret->time=time(NULL); */ /* rezero timeout? */
/* again, just leave the session
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(ctx,c)
-SSL_CTX *ctx;
-SSL_SESSION *c;
+int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
{
+ int ret=0;
SSL_SESSION *s;
- /* conn_init(); */
+ /* 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=(SSL_SESSION *)lh_insert(ctx->sessions,(char *)c);
- CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+ s=(SSL_SESSION *)lh_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 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);
+ /* 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
- return(1);
+ {
+ /* 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(ctx,c)
-SSL_CTX *ctx;
-SSL_SESSION *c;
+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->session_id_length != 0) && (c != NULL))
+ 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;
+ if(lck) CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+ if ((r = (SSL_SESSION *)lh_retrieve(ctx->sessions,c)) == c)
+ {
+ ret=1;
+ r=(SSL_SESSION *)lh_delete(ctx->sessions,c);
+ SSL_SESSION_list_remove(ctx,c);
+ }
- CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+ 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,c);
+ ctx->remove_session_cb(ctx,r);
SSL_SESSION_free(r);
}
}
return(ret);
}
-void SSL_SESSION_free(ss)
-SSL_SESSION *ss;
+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)
}
#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);
+ 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_free(ss->ciphers);
- memset(ss,0,sizeof(*ss));
- Free(ss);
+ if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers);
+ OPENSSL_cleanse(ss,sizeof(*ss));
+ OPENSSL_free(ss);
}
-int SSL_set_session(s, session)
-SSL *s;
-SSL_SESSION *session;
+int SSL_set_session(SSL *s, SSL_SESSION *session)
{
int ret=0;
SSL_METHOD *meth;
{
if (!SSL_set_ssl_method(s,meth))
return(0);
- session->timeout=SSL_get_default_timeout(s);
+ 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 *)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_set_timeout(s,t)
-SSL_SESSION *s;
-long t;
+long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
{
if (s == NULL) return(0);
s->timeout=t;
return(1);
}
-long SSL_get_timeout(s)
-SSL_SESSION *s;
+long SSL_SESSION_get_timeout(const SSL_SESSION *s)
{
if (s == NULL) return(0);
return(s->timeout);
}
-long SSL_get_time(s)
-SSL_SESSION *s;
+long SSL_SESSION_get_time(const SSL_SESSION *s)
{
if (s == NULL) return(0);
return(s->time);
}
-long SSL_set_time(s,t)
-SSL_SESSION *s;
-long t;
+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);
+ }
+
typedef struct timeout_param_st
{
SSL_CTX *ctx;
LHASH *cache;
} TIMEOUT_PARAM;
-static void timeout(s,p)
-SSL_SESSION *s;
-TIMEOUT_PARAM *p;
+static void timeout(SSL_SESSION *s, TIMEOUT_PARAM *p)
{
if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */
{
- lh_delete(p->cache,(char *)s);
+ /* The reason we don't call SSL_CTX_remove_session() is to
+ * save on locking overhead */
+ lh_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);
}
}
-void SSL_CTX_flush_sessions(s,t)
-SSL_CTX *s;
-long t;
+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=SSL_CTX_sessions(s);
+ tp.cache=s->sessions;
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);
+ lh_doall_arg(tp.cache, LHASH_DOALL_ARG_FN(timeout), &tp);
tp.cache->down_load=i;
CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
}
-int ssl_clear_bad_session(s)
-SSL *s;
+int ssl_clear_bad_session(SSL *s)
{
if ( (s->session != NULL) &&
!(s->shutdown & SSL_SENT_SHUTDOWN) &&
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;
+ }
+ }
+
projects / openssl.git / blobdiff