2 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
64 SSL_SESSION *SSL_SESSION_new()
68 ss=(SSL_SESSION *)Malloc(sizeof(SSL_SESSION));
71 SSLerr(SSL_F_SSL_SESSION_NEW,ERR_R_MALLOC_FAILURE);
74 memset(ss,0,sizeof(SSL_SESSION));
77 ss->timeout=60*5+4; /* 5 minute timeout by default */
82 int ssl_get_new_session(s, session)
88 if ((ss=SSL_SESSION_new()) == NULL) return(0);
90 /* If the context has a default timeout, use it */
91 if (s->ctx->session_timeout != 0)
92 ss->timeout=SSL_get_default_timeout(s);
94 if (s->session != NULL)
96 SSL_SESSION_free(s->session);
102 if (s->version == SSL2_CLIENT_VERSION)
105 ss->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
107 else if (s->version == SSL3_VERSION_MAJOR)
110 ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
114 SSLerr(SSL_F_SSL_GET_NEW_SESSION,SSL_R_UNSUPPORTED_SSL_VERSION);
115 SSL_SESSION_free(ss);
123 RAND_bytes(ss->session_id,ss->session_id_length);
124 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
125 r=(SSL_SESSION *)lh_retrieve(s->ctx->sessions,
127 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
128 if (r == NULL) break;
129 /* else - woops a session_id match */
134 ss->session_id_length=0;
138 ss->ssl_version=s->version;
143 int ssl_get_prev_session(s, len, session)
146 unsigned char *session;
148 SSL_SESSION *ret,data;
151 data.ssl_version=s->version;
152 data.session_id_length=len;
153 if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
155 memcpy(data.session_id,session,len);;
157 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
158 ret=(SSL_SESSION *)lh_retrieve(s->ctx->sessions,(char *)&data);
159 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
167 if ((s->ctx->get_session_cb != NULL) &&
168 ((ret=s->ctx->get_session_cb(s,session,len,©))
171 s->ctx->sess_cb_hit++;
173 /* The following should not return 1, otherwise,
174 * things are very strange */
175 SSL_CTX_add_session(s->ctx,ret);
178 SSL_SESSION_free(ret);
180 if (ret == NULL) return(0);
183 if (ret->cipher == NULL)
191 if (ret->ssl_version == 3)
192 ret->cipher=ssl_get_cipher_by_char(s,&(buf[2]));
194 ret->cipher=ssl_get_cipher_by_char(s,&(buf[1]));
195 if (ret->cipher == NULL)
199 /* If a thread got the session, then 'swaped', and another got
200 * it and then due to a time-out decided to 'Free' it we could
201 * be in trouble. So I'll increment it now, then double decrement
202 * later - am I speaking rubbish?. */
203 CRYPTO_add(&ret->references,1,CRYPTO_LOCK_SSL_SESSION);
205 if ((long)(ret->time+ret->timeout) < (long)time(NULL)) /* timeout */
207 s->ctx->sess_timeout++;
208 /* remove it from the cache */
209 SSL_CTX_remove_session(s->ctx,ret);
210 SSL_SESSION_free(ret); /* again to actually Free it */
216 /* ret->time=time(NULL); */ /* rezero timeout? */
217 /* again, just leave the session
218 * if it is the same session, we have just incremented and
219 * then decremented the reference count :-) */
220 if (s->session != NULL)
221 SSL_SESSION_free(s->session);
226 int SSL_CTX_add_session(ctx,c)
233 CRYPTO_add(&c->references,1,CRYPTO_LOCK_SSL_SESSION);
235 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
236 s=(SSL_SESSION *)lh_insert(ctx->sessions,(char *)c);
237 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
239 /* If the same session if is being 're-added', Free the old
240 * one when the last person stops using it.
241 * This will also work if it is alread in the cache.
242 * The references will go up and then down :-) */
252 int SSL_CTX_remove_session(ctx,c)
259 if ((c->session_id_length != 0) && (c != NULL))
261 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
262 r=(SSL_SESSION *)lh_delete(ctx->sessions,(char *)c);
263 if (r != NULL) ret=1;
265 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
270 if (ctx->remove_session_cb != NULL)
271 ctx->remove_session_cb(ctx,c);
280 void SSL_SESSION_free(ss)
285 i=CRYPTO_add(&ss->references,-1,CRYPTO_LOCK_SSL_SESSION);
290 fprintf(stderr,"SSL_SESSION_free, bad reference count\n");
295 memset(ss->key_arg,0,SSL_MAX_KEY_ARG_LENGTH);
296 memset(ss->master_key,0,SSL_MAX_MASTER_KEY_LENGTH);
297 memset(ss->session_id,0,SSL_MAX_SSL_SESSION_ID_LENGTH);
298 if (ss->cert != NULL) ssl_cert_free(ss->cert);
299 if (ss->peer != NULL) X509_free(ss->peer);
300 if (ss->ciphers != NULL) sk_free(ss->ciphers);
301 memset(ss,0,sizeof(*ss));
305 int SSL_set_session(s, session)
307 SSL_SESSION *session;
314 meth=s->ctx->method->get_ssl_method(session->ssl_version);
316 meth=s->method->get_ssl_method(session->ssl_version);
319 SSLerr(SSL_F_SSL_SET_SESSION,SSL_R_UNABLE_TO_FIND_SSL_METHOD);
323 if (meth != s->method)
325 if (!SSL_set_ssl_method(s,meth))
327 session->timeout=SSL_get_default_timeout(s);
330 /* CRYPTO_w_lock(CRYPTO_LOCK_SSL);*/
331 CRYPTO_add(&session->references,1,CRYPTO_LOCK_SSL_SESSION);
332 if (s->session != NULL)
333 SSL_SESSION_free(s->session);
335 /* CRYPTO_w_unlock(CRYPTO_LOCK_SSL);*/
341 long SSL_set_timeout(s,t)
345 if (s == NULL) return(0);
350 long SSL_get_timeout(s)
353 if (s == NULL) return(0);
360 if (s == NULL) return(0);
364 long SSL_set_time(s,t)
368 if (s == NULL) return(0);
373 typedef struct timeout_param_st
380 static void timeout(s,p)
384 if ((p->time == 0) || (p->time > (s->time+s->timeout))) /* timeout */
386 lh_delete(p->cache,(char *)s);
388 if (p->ctx->remove_session_cb != NULL)
389 p->ctx->remove_session_cb(p->ctx,s);
394 void SSL_CTX_flush_sessions(s,t)
402 tp.cache=SSL_CTX_sessions(s);
403 if (tp.cache == NULL) return;
405 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
406 i=tp.cache->down_load;
407 tp.cache->down_load=0;
408 lh_doall_arg(tp.cache,(void (*)())timeout,(char *)&tp);
409 tp.cache->down_load=i;
410 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
413 int ssl_clear_bad_session(s)
416 if ( (s->session != NULL) &&
417 !(s->shutdown & SSL_SENT_SHUTDOWN) &&
418 !(SSL_in_init(s) || SSL_in_before(s)))
420 SSL_CTX_remove_session(s->ctx,s->session);