1 files changed, 1143 insertions, 0 deletions

diff --git a/src/lib/libssl/ssl_sess.c b/src/lib/libssl/ssl_sess.c
new file mode 100644
index 0000000000..b29115862b
--- /dev/null
+++ b/src/lib/libssl/ssl_sess.c
@@ -0,0 +1,1143 @@
+/* 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
+#ifndef OPENSSL_NO_SRP
+        ss->srp_username = 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;
+}
+
+unsigned int
+SSL_SESSION_get_compress_id(const SSL_SESSION *s)
+{
+        return s->compress_meth;
+}
+
+/* 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->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 == TLS1_1_VERSION) {
+                        ss->ssl_version = TLS1_1_VERSION;
+                        ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
+                } else if (s->version == TLS1_2_VERSION) {
+                        ss->ssl_version = TLS1_2_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);
+}
+
+/* ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
+ * connection. It is only called by servers.
+ *
+ *   session_id: points at the session ID in the ClientHello. This code will
+ *       read past the end of this in order to parse out the session ticket
+ *       extension, if any.
+ *   len: the length of the session ID.
+ *   limit: a pointer to the first byte after the ClientHello.
+ *
+ * Returns:
+ *   -1: error
+ *    0: a session may have been found.
+ *
+ * Side effects:
+ *   - If a session is found then s->session is pointed at it (after freeing an
+ *     existing session if need be) and s->verify_result is set from the session.
+ *   - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1
+ *     if the server should issue a new session ticket (to 0 otherwise).
+ */
+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;
+        int try_session_cache = 1;
+#ifndef OPENSSL_NO_TLSEXT
+        int r;
+#endif
+
+        if (len > SSL_MAX_SSL_SESSION_ID_LENGTH)
+                goto err;
+
+        if (len == 0)
+                try_session_cache = 0;
+
+#ifndef OPENSSL_NO_TLSEXT
+        r = tls1_process_ticket(s, session_id, len, limit, &ret); /* sets s->tlsext_ticket_expected */
+        switch (r) {
+        case -1: /* Error during processing */
+                fatal = 1;
+                goto err;
+        case 0: /* No ticket found */
+        case 1: /* Zero length ticket found */
+                break; /* Ok to carry on processing session id. */
+        case 2: /* Ticket found but not decrypted. */
+        case 3: /* Ticket decrypted, *ret has been set. */
+                try_session_cache = 0;
+                break;
+        default:
+                abort();
+        }
+#endif
+
+        if (try_session_cache &&
+                ret == NULL &&
+        !(s->session_ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) {
+                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)
+                        s->session_ctx->stats.sess_miss++;
+        }
+
+        if (try_session_cache &&
+                ret == NULL &&
+        s->session_ctx->get_session_cb != NULL) {
+                int copy = 1;
+
+                if ((ret = s->session_ctx->get_session_cb(s, session_id, len, &copy))) {
+                        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 have the session requested by the client, but we don't
+                 * want to use it in this context. */
+                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 (ret->timeout < (long)(time(NULL) - ret->time)) /* timeout */
+        {
+                s->session_ctx->stats.sess_timeout++;
+                if (try_session_cache) {
+                        /* session was from the cache, so remove it */
+                        SSL_CTX_remove_session(s->session_ctx, ret);
+                }
+                goto err;
+        }
+
+        s->session_ctx->stats.sess_hit++;
+
+        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);
+#ifndef OPENSSL_NO_TLSEXT
+                if (!try_session_cache) {
+                        /* The session was from a ticket, so we should
+                         * issue a ticket for the new session */
+                        s->tlsext_ticket_expected = 1;
+                }
+#endif
+        }
+        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
+#ifndef OPENSSL_NO_SRP
+        if (ss->srp_username != NULL)
+                OPENSSL_free(ss->srp_username);
+#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);
+                }
+
+#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);
+}
+
+X509
+*SSL_SESSION_get0_peer(SSL_SESSION *s)
+{
+        return s->peer;
+}
+
+int
+SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
+    unsigned int sid_ctx_len)
+{
+        if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
+                SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
+                return 0;
+        }
+        s->sid_ctx_length = sid_ctx_len;
+        memcpy(s->sid_ctx, sid_ctx, sid_ctx_len);
+
+        return 1;
+}
+
+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)