[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /* ====================================================================
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| 11 | * Copyright 2005 Nokia. All rights reserved.
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| 12 | *
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| 13 | * The portions of the attached software ("Contribution") is developed by
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| 14 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source
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| 15 | * license.
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| 16 | *
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| 17 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of
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| 18 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
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| 19 | * support (see RFC 4279) to OpenSSL.
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| 20 | *
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| 21 | * No patent licenses or other rights except those expressly stated in
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| 22 | * the OpenSSL open source license shall be deemed granted or received
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| 23 | * expressly, by implication, estoppel, or otherwise.
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| 24 | *
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| 25 | * No assurances are provided by Nokia that the Contribution does not
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| 26 | * infringe the patent or other intellectual property rights of any third
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| 27 | * party or that the license provides you with all the necessary rights
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| 28 | * to make use of the Contribution.
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| 29 | *
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| 30 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
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| 31 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
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| 32 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
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| 33 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
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| 34 | * OTHERWISE.
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| 35 | */
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| 36 |
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| 37 | #include <stdio.h>
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| 38 | #include <openssl/lhash.h>
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| 39 | #include <openssl/rand.h>
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| 40 | #include <openssl/engine.h>
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| 41 | #include "ssl_locl.h"
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| 42 |
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| 43 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s);
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| 44 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s);
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| 45 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck);
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| 46 |
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| 47 | SSL_SESSION *SSL_get_session(const SSL *ssl)
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| 48 | /* aka SSL_get0_session; gets 0 objects, just returns a copy of the pointer */
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| 49 | {
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| 50 | return (ssl->session);
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| 51 | }
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| 52 |
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| 53 | SSL_SESSION *SSL_get1_session(SSL *ssl)
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| 54 | /* variant of SSL_get_session: caller really gets something */
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| 55 | {
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| 56 | SSL_SESSION *sess;
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| 57 | /*
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| 58 | * Need to lock this all up rather than just use CRYPTO_add so that
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| 59 | * somebody doesn't free ssl->session between when we check it's non-null
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| 60 | * and when we up the reference count.
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| 61 | */
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| 62 | CRYPTO_THREAD_read_lock(ssl->lock);
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| 63 | sess = ssl->session;
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| 64 | if (sess)
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| 65 | SSL_SESSION_up_ref(sess);
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| 66 | CRYPTO_THREAD_unlock(ssl->lock);
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| 67 | return sess;
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| 68 | }
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| 69 |
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| 70 | int SSL_SESSION_set_ex_data(SSL_SESSION *s, int idx, void *arg)
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| 71 | {
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| 72 | return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
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| 73 | }
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| 74 |
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| 75 | void *SSL_SESSION_get_ex_data(const SSL_SESSION *s, int idx)
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| 76 | {
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| 77 | return (CRYPTO_get_ex_data(&s->ex_data, idx));
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| 78 | }
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| 79 |
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| 80 | SSL_SESSION *SSL_SESSION_new(void)
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| 81 | {
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| 82 | SSL_SESSION *ss;
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| 83 |
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| 84 | ss = OPENSSL_zalloc(sizeof(*ss));
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| 85 | if (ss == NULL) {
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| 86 | SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE);
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| 87 | return NULL;
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| 88 | }
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| 89 |
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| 90 | ss->verify_result = 1; /* avoid 0 (= X509_V_OK) just in case */
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| 91 | ss->references = 1;
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| 92 | ss->timeout = 60 * 5 + 4; /* 5 minute timeout by default */
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| 93 | ss->time = (unsigned long)time(NULL);
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| 94 | ss->lock = CRYPTO_THREAD_lock_new();
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| 95 | if (ss->lock == NULL) {
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| 96 | SSLerr(SSL_F_SSL_SESSION_NEW, ERR_R_MALLOC_FAILURE);
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| 97 | OPENSSL_free(ss);
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| 98 | return NULL;
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| 99 | }
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| 100 |
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| 101 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data)) {
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| 102 | CRYPTO_THREAD_lock_free(ss->lock);
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| 103 | OPENSSL_free(ss);
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| 104 | return NULL;
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| 105 | }
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| 106 | return ss;
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| 107 | }
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| 108 |
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| 109 | /*
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| 110 | * Create a new SSL_SESSION and duplicate the contents of |src| into it. If
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| 111 | * ticket == 0 then no ticket information is duplicated, otherwise it is.
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| 112 | */
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| 113 | SSL_SESSION *ssl_session_dup(SSL_SESSION *src, int ticket)
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| 114 | {
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| 115 | SSL_SESSION *dest;
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| 116 |
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| 117 | dest = OPENSSL_malloc(sizeof(*src));
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| 118 | if (dest == NULL) {
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| 119 | goto err;
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| 120 | }
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| 121 | memcpy(dest, src, sizeof(*dest));
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| 122 |
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| 123 | /*
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| 124 | * Set the various pointers to NULL so that we can call SSL_SESSION_free in
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| 125 | * the case of an error whilst halfway through constructing dest
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| 126 | */
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| 127 | #ifndef OPENSSL_NO_PSK
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| 128 | dest->psk_identity_hint = NULL;
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| 129 | dest->psk_identity = NULL;
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| 130 | #endif
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| 131 | dest->ciphers = NULL;
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| 132 | dest->tlsext_hostname = NULL;
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| 133 | #ifndef OPENSSL_NO_EC
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| 134 | dest->tlsext_ecpointformatlist = NULL;
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| 135 | dest->tlsext_ellipticcurvelist = NULL;
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| 136 | #endif
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| 137 | dest->tlsext_tick = NULL;
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| 138 | #ifndef OPENSSL_NO_SRP
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| 139 | dest->srp_username = NULL;
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| 140 | #endif
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| 141 | memset(&dest->ex_data, 0, sizeof(dest->ex_data));
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| 142 |
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| 143 | /* We deliberately don't copy the prev and next pointers */
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| 144 | dest->prev = NULL;
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| 145 | dest->next = NULL;
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| 146 |
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| 147 | dest->references = 1;
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| 148 |
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| 149 | dest->lock = CRYPTO_THREAD_lock_new();
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| 150 | if (dest->lock == NULL)
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| 151 | goto err;
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| 152 |
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| 153 | if (src->peer != NULL)
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| 154 | X509_up_ref(src->peer);
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| 155 |
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| 156 | if (src->peer_chain != NULL) {
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| 157 | dest->peer_chain = X509_chain_up_ref(src->peer_chain);
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| 158 | if (dest->peer_chain == NULL)
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| 159 | goto err;
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| 160 | }
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| 161 | #ifndef OPENSSL_NO_PSK
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| 162 | if (src->psk_identity_hint) {
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| 163 | dest->psk_identity_hint = OPENSSL_strdup(src->psk_identity_hint);
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| 164 | if (dest->psk_identity_hint == NULL) {
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| 165 | goto err;
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| 166 | }
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| 167 | }
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| 168 | if (src->psk_identity) {
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| 169 | dest->psk_identity = OPENSSL_strdup(src->psk_identity);
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| 170 | if (dest->psk_identity == NULL) {
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| 171 | goto err;
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| 172 | }
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| 173 | }
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| 174 | #endif
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| 175 |
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| 176 | if (src->ciphers != NULL) {
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| 177 | dest->ciphers = sk_SSL_CIPHER_dup(src->ciphers);
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| 178 | if (dest->ciphers == NULL)
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| 179 | goto err;
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| 180 | }
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| 181 |
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| 182 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL_SESSION,
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| 183 | &dest->ex_data, &src->ex_data)) {
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| 184 | goto err;
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| 185 | }
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| 186 |
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| 187 | if (src->tlsext_hostname) {
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| 188 | dest->tlsext_hostname = OPENSSL_strdup(src->tlsext_hostname);
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| 189 | if (dest->tlsext_hostname == NULL) {
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| 190 | goto err;
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| 191 | }
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| 192 | }
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| 193 | #ifndef OPENSSL_NO_EC
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| 194 | if (src->tlsext_ecpointformatlist) {
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| 195 | dest->tlsext_ecpointformatlist =
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| 196 | OPENSSL_memdup(src->tlsext_ecpointformatlist,
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| 197 | src->tlsext_ecpointformatlist_length);
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| 198 | if (dest->tlsext_ecpointformatlist == NULL)
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| 199 | goto err;
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| 200 | }
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| 201 | if (src->tlsext_ellipticcurvelist) {
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| 202 | dest->tlsext_ellipticcurvelist =
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| 203 | OPENSSL_memdup(src->tlsext_ellipticcurvelist,
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| 204 | src->tlsext_ellipticcurvelist_length);
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| 205 | if (dest->tlsext_ellipticcurvelist == NULL)
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| 206 | goto err;
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| 207 | }
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| 208 | #endif
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| 209 |
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| 210 | if (ticket != 0) {
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| 211 | dest->tlsext_tick =
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| 212 | OPENSSL_memdup(src->tlsext_tick, src->tlsext_ticklen);
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| 213 | if (dest->tlsext_tick == NULL)
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| 214 | goto err;
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| 215 | } else {
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| 216 | dest->tlsext_tick_lifetime_hint = 0;
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| 217 | dest->tlsext_ticklen = 0;
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| 218 | }
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| 219 |
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| 220 | #ifndef OPENSSL_NO_SRP
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| 221 | if (src->srp_username) {
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| 222 | dest->srp_username = OPENSSL_strdup(src->srp_username);
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| 223 | if (dest->srp_username == NULL) {
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| 224 | goto err;
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| 225 | }
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| 226 | }
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| 227 | #endif
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| 228 |
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| 229 | return dest;
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| 230 | err:
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| 231 | SSLerr(SSL_F_SSL_SESSION_DUP, ERR_R_MALLOC_FAILURE);
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| 232 | SSL_SESSION_free(dest);
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| 233 | return NULL;
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| 234 | }
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| 235 |
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| 236 | const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *s, unsigned int *len)
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| 237 | {
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| 238 | if (len)
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| 239 | *len = s->session_id_length;
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| 240 | return s->session_id;
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| 241 | }
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| 242 | const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *s,
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| 243 | unsigned int *len)
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| 244 | {
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| 245 | if (len != NULL)
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| 246 | *len = s->sid_ctx_length;
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| 247 | return s->sid_ctx;
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| 248 | }
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| 249 |
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| 250 | unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *s)
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| 251 | {
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| 252 | return s->compress_meth;
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| 253 | }
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| 254 |
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| 255 | /*
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| 256 | * SSLv3/TLSv1 has 32 bytes (256 bits) of session ID space. As such, filling
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| 257 | * the ID with random junk repeatedly until we have no conflict is going to
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| 258 | * complete in one iteration pretty much "most" of the time (btw:
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| 259 | * understatement). So, if it takes us 10 iterations and we still can't avoid
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| 260 | * a conflict - well that's a reasonable point to call it quits. Either the
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| 261 | * RAND code is broken or someone is trying to open roughly very close to
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| 262 | * 2^256 SSL sessions to our server. How you might store that many sessions
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| 263 | * is perhaps a more interesting question ...
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| 264 | */
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| 265 |
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| 266 | #define MAX_SESS_ID_ATTEMPTS 10
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| 267 | static int def_generate_session_id(const SSL *ssl, unsigned char *id,
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| 268 | unsigned int *id_len)
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| 269 | {
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| 270 | unsigned int retry = 0;
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| 271 | do
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| 272 | if (RAND_bytes(id, *id_len) <= 0)
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| 273 | return 0;
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| 274 | while (SSL_has_matching_session_id(ssl, id, *id_len) &&
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| 275 | (++retry < MAX_SESS_ID_ATTEMPTS)) ;
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| 276 | if (retry < MAX_SESS_ID_ATTEMPTS)
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| 277 | return 1;
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| 278 | /* else - woops a session_id match */
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| 279 | /*
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| 280 | * XXX We should also check the external cache -- but the probability of
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| 281 | * a collision is negligible, and we could not prevent the concurrent
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| 282 | * creation of sessions with identical IDs since we currently don't have
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| 283 | * means to atomically check whether a session ID already exists and make
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| 284 | * a reservation for it if it does not (this problem applies to the
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| 285 | * internal cache as well).
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| 286 | */
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| 287 | return 0;
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| 288 | }
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| 289 |
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| 290 | int ssl_get_new_session(SSL *s, int session)
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| 291 | {
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| 292 | /* This gets used by clients and servers. */
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| 293 |
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| 294 | unsigned int tmp;
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| 295 | SSL_SESSION *ss = NULL;
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| 296 | GEN_SESSION_CB cb = def_generate_session_id;
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| 297 |
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| 298 | if ((ss = SSL_SESSION_new()) == NULL)
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| 299 | return (0);
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| 300 |
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| 301 | /* If the context has a default timeout, use it */
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| 302 | if (s->session_ctx->session_timeout == 0)
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| 303 | ss->timeout = SSL_get_default_timeout(s);
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| 304 | else
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| 305 | ss->timeout = s->session_ctx->session_timeout;
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| 306 |
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| 307 | SSL_SESSION_free(s->session);
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| 308 | s->session = NULL;
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| 309 |
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| 310 | if (session) {
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| 311 | if (s->version == SSL3_VERSION) {
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| 312 | ss->ssl_version = SSL3_VERSION;
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| 313 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
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| 314 | } else if (s->version == TLS1_VERSION) {
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| 315 | ss->ssl_version = TLS1_VERSION;
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| 316 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
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| 317 | } else if (s->version == TLS1_1_VERSION) {
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| 318 | ss->ssl_version = TLS1_1_VERSION;
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| 319 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
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| 320 | } else if (s->version == TLS1_2_VERSION) {
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| 321 | ss->ssl_version = TLS1_2_VERSION;
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| 322 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
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| 323 | } else if (s->version == DTLS1_BAD_VER) {
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| 324 | ss->ssl_version = DTLS1_BAD_VER;
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| 325 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
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| 326 | } else if (s->version == DTLS1_VERSION) {
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| 327 | ss->ssl_version = DTLS1_VERSION;
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| 328 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
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| 329 | } else if (s->version == DTLS1_2_VERSION) {
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| 330 | ss->ssl_version = DTLS1_2_VERSION;
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| 331 | ss->session_id_length = SSL3_SSL_SESSION_ID_LENGTH;
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| 332 | } else {
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| 333 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION);
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| 334 | SSL_SESSION_free(ss);
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| 335 | return (0);
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| 336 | }
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| 337 |
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| 338 | /*-
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| 339 | * If RFC5077 ticket, use empty session ID (as server).
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| 340 | * Note that:
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| 341 | * (a) ssl_get_prev_session() does lookahead into the
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| 342 | * ClientHello extensions to find the session ticket.
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| 343 | * When ssl_get_prev_session() fails, statem_srvr.c calls
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| 344 | * ssl_get_new_session() in tls_process_client_hello().
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| 345 | * At that point, it has not yet parsed the extensions,
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| 346 | * however, because of the lookahead, it already knows
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| 347 | * whether a ticket is expected or not.
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| 348 | *
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| 349 | * (b) statem_clnt.c calls ssl_get_new_session() before parsing
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| 350 | * ServerHello extensions, and before recording the session
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| 351 | * ID received from the server, so this block is a noop.
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| 352 | */
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| 353 | if (s->tlsext_ticket_expected) {
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| 354 | ss->session_id_length = 0;
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| 355 | goto sess_id_done;
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| 356 | }
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| 357 |
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| 358 | /* Choose which callback will set the session ID */
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| 359 | CRYPTO_THREAD_read_lock(s->lock);
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| 360 | CRYPTO_THREAD_read_lock(s->session_ctx->lock);
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| 361 | if (s->generate_session_id)
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| 362 | cb = s->generate_session_id;
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| 363 | else if (s->session_ctx->generate_session_id)
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| 364 | cb = s->session_ctx->generate_session_id;
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| 365 | CRYPTO_THREAD_unlock(s->session_ctx->lock);
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| 366 | CRYPTO_THREAD_unlock(s->lock);
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| 367 | /* Choose a session ID */
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| 368 | memset(ss->session_id, 0, ss->session_id_length);
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| 369 | tmp = ss->session_id_length;
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| 370 | if (!cb(s, ss->session_id, &tmp)) {
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| 371 | /* The callback failed */
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| 372 | SSLerr(SSL_F_SSL_GET_NEW_SESSION,
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| 373 | SSL_R_SSL_SESSION_ID_CALLBACK_FAILED);
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| 374 | SSL_SESSION_free(ss);
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| 375 | return (0);
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| 376 | }
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| 377 | /*
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| 378 | * Don't allow the callback to set the session length to zero. nor
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| 379 | * set it higher than it was.
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| 380 | */
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| 381 | if (tmp == 0 || tmp > ss->session_id_length) {
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| 382 | /* The callback set an illegal length */
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| 383 | SSLerr(SSL_F_SSL_GET_NEW_SESSION,
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| 384 | SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH);
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| 385 | SSL_SESSION_free(ss);
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| 386 | return (0);
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| 387 | }
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| 388 | ss->session_id_length = tmp;
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| 389 | /* Finally, check for a conflict */
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| 390 | if (SSL_has_matching_session_id(s, ss->session_id,
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| 391 | ss->session_id_length)) {
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| 392 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, SSL_R_SSL_SESSION_ID_CONFLICT);
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| 393 | SSL_SESSION_free(ss);
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| 394 | return (0);
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| 395 | }
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| 396 |
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| 397 | sess_id_done:
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| 398 | if (s->tlsext_hostname) {
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| 399 | ss->tlsext_hostname = OPENSSL_strdup(s->tlsext_hostname);
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| 400 | if (ss->tlsext_hostname == NULL) {
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| 401 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
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| 402 | SSL_SESSION_free(ss);
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| 403 | return 0;
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| 404 | }
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| 405 | }
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| 406 | } else {
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| 407 | ss->session_id_length = 0;
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| 408 | }
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| 409 |
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| 410 | if (s->sid_ctx_length > sizeof ss->sid_ctx) {
|
---|
| 411 | SSLerr(SSL_F_SSL_GET_NEW_SESSION, ERR_R_INTERNAL_ERROR);
|
---|
| 412 | SSL_SESSION_free(ss);
|
---|
| 413 | return 0;
|
---|
| 414 | }
|
---|
| 415 | memcpy(ss->sid_ctx, s->sid_ctx, s->sid_ctx_length);
|
---|
| 416 | ss->sid_ctx_length = s->sid_ctx_length;
|
---|
| 417 | s->session = ss;
|
---|
| 418 | ss->ssl_version = s->version;
|
---|
| 419 | ss->verify_result = X509_V_OK;
|
---|
| 420 |
|
---|
| 421 | /* If client supports extended master secret set it in session */
|
---|
| 422 | if (s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS)
|
---|
| 423 | ss->flags |= SSL_SESS_FLAG_EXTMS;
|
---|
| 424 |
|
---|
| 425 | return (1);
|
---|
| 426 | }
|
---|
| 427 |
|
---|
| 428 | /*-
|
---|
| 429 | * ssl_get_prev attempts to find an SSL_SESSION to be used to resume this
|
---|
| 430 | * connection. It is only called by servers.
|
---|
| 431 | *
|
---|
| 432 | * ext: ClientHello extensions (including length prefix)
|
---|
| 433 | * session_id: ClientHello session ID.
|
---|
| 434 | *
|
---|
| 435 | * Returns:
|
---|
| 436 | * -1: error
|
---|
| 437 | * 0: a session may have been found.
|
---|
| 438 | *
|
---|
| 439 | * Side effects:
|
---|
| 440 | * - If a session is found then s->session is pointed at it (after freeing an
|
---|
| 441 | * existing session if need be) and s->verify_result is set from the session.
|
---|
| 442 | * - Both for new and resumed sessions, s->tlsext_ticket_expected is set to 1
|
---|
| 443 | * if the server should issue a new session ticket (to 0 otherwise).
|
---|
| 444 | */
|
---|
| 445 | int ssl_get_prev_session(SSL *s, const PACKET *ext, const PACKET *session_id)
|
---|
| 446 | {
|
---|
| 447 | /* This is used only by servers. */
|
---|
| 448 |
|
---|
| 449 | SSL_SESSION *ret = NULL;
|
---|
| 450 | int fatal = 0;
|
---|
| 451 | int try_session_cache = 1;
|
---|
| 452 | int r;
|
---|
| 453 |
|
---|
| 454 | if (PACKET_remaining(session_id) == 0)
|
---|
| 455 | try_session_cache = 0;
|
---|
| 456 |
|
---|
| 457 | /* sets s->tlsext_ticket_expected and extended master secret flag */
|
---|
| 458 | r = tls_check_serverhello_tlsext_early(s, ext, session_id, &ret);
|
---|
| 459 | switch (r) {
|
---|
| 460 | case -1: /* Error during processing */
|
---|
| 461 | fatal = 1;
|
---|
| 462 | goto err;
|
---|
| 463 | case 0: /* No ticket found */
|
---|
| 464 | case 1: /* Zero length ticket found */
|
---|
| 465 | break; /* Ok to carry on processing session id. */
|
---|
| 466 | case 2: /* Ticket found but not decrypted. */
|
---|
| 467 | case 3: /* Ticket decrypted, *ret has been set. */
|
---|
| 468 | try_session_cache = 0;
|
---|
| 469 | break;
|
---|
| 470 | default:
|
---|
| 471 | abort();
|
---|
| 472 | }
|
---|
| 473 |
|
---|
| 474 | if (try_session_cache &&
|
---|
| 475 | ret == NULL &&
|
---|
| 476 | !(s->session_ctx->session_cache_mode &
|
---|
| 477 | SSL_SESS_CACHE_NO_INTERNAL_LOOKUP)) {
|
---|
| 478 | SSL_SESSION data;
|
---|
| 479 | size_t local_len;
|
---|
| 480 | data.ssl_version = s->version;
|
---|
| 481 | memset(data.session_id, 0, sizeof(data.session_id));
|
---|
| 482 | if (!PACKET_copy_all(session_id, data.session_id,
|
---|
| 483 | sizeof(data.session_id), &local_len)) {
|
---|
| 484 | goto err;
|
---|
| 485 | }
|
---|
| 486 | data.session_id_length = local_len;
|
---|
| 487 | CRYPTO_THREAD_read_lock(s->session_ctx->lock);
|
---|
| 488 | ret = lh_SSL_SESSION_retrieve(s->session_ctx->sessions, &data);
|
---|
| 489 | if (ret != NULL) {
|
---|
| 490 | /* don't allow other threads to steal it: */
|
---|
| 491 | SSL_SESSION_up_ref(ret);
|
---|
| 492 | }
|
---|
| 493 | CRYPTO_THREAD_unlock(s->session_ctx->lock);
|
---|
| 494 | if (ret == NULL)
|
---|
| 495 | s->session_ctx->stats.sess_miss++;
|
---|
| 496 | }
|
---|
| 497 |
|
---|
| 498 | if (try_session_cache &&
|
---|
| 499 | ret == NULL && s->session_ctx->get_session_cb != NULL) {
|
---|
| 500 | int copy = 1;
|
---|
| 501 | ret = s->session_ctx->get_session_cb(s, PACKET_data(session_id),
|
---|
| 502 | PACKET_remaining(session_id),
|
---|
| 503 | ©);
|
---|
| 504 |
|
---|
| 505 | if (ret != NULL) {
|
---|
| 506 | s->session_ctx->stats.sess_cb_hit++;
|
---|
| 507 |
|
---|
| 508 | /*
|
---|
| 509 | * Increment reference count now if the session callback asks us
|
---|
| 510 | * to do so (note that if the session structures returned by the
|
---|
| 511 | * callback are shared between threads, it must handle the
|
---|
| 512 | * reference count itself [i.e. copy == 0], or things won't be
|
---|
| 513 | * thread-safe).
|
---|
| 514 | */
|
---|
| 515 | if (copy)
|
---|
| 516 | SSL_SESSION_up_ref(ret);
|
---|
| 517 |
|
---|
| 518 | /*
|
---|
| 519 | * Add the externally cached session to the internal cache as
|
---|
| 520 | * well if and only if we are supposed to.
|
---|
| 521 | */
|
---|
| 522 | if (!
|
---|
| 523 | (s->session_ctx->session_cache_mode &
|
---|
| 524 | SSL_SESS_CACHE_NO_INTERNAL_STORE)) {
|
---|
| 525 | /*
|
---|
| 526 | * The following should not return 1, otherwise, things are
|
---|
| 527 | * very strange
|
---|
| 528 | */
|
---|
| 529 | if (SSL_CTX_add_session(s->session_ctx, ret))
|
---|
| 530 | goto err;
|
---|
| 531 | }
|
---|
| 532 | }
|
---|
| 533 | }
|
---|
| 534 |
|
---|
| 535 | if (ret == NULL)
|
---|
| 536 | goto err;
|
---|
| 537 |
|
---|
| 538 | /* Now ret is non-NULL and we own one of its reference counts. */
|
---|
| 539 |
|
---|
| 540 | if (ret->sid_ctx_length != s->sid_ctx_length
|
---|
| 541 | || memcmp(ret->sid_ctx, s->sid_ctx, ret->sid_ctx_length)) {
|
---|
| 542 | /*
|
---|
| 543 | * We have the session requested by the client, but we don't want to
|
---|
| 544 | * use it in this context.
|
---|
| 545 | */
|
---|
| 546 | goto err; /* treat like cache miss */
|
---|
| 547 | }
|
---|
| 548 |
|
---|
| 549 | if ((s->verify_mode & SSL_VERIFY_PEER) && s->sid_ctx_length == 0) {
|
---|
| 550 | /*
|
---|
| 551 | * We can't be sure if this session is being used out of context,
|
---|
| 552 | * which is especially important for SSL_VERIFY_PEER. The application
|
---|
| 553 | * should have used SSL[_CTX]_set_session_id_context. For this error
|
---|
| 554 | * case, we generate an error instead of treating the event like a
|
---|
| 555 | * cache miss (otherwise it would be easy for applications to
|
---|
| 556 | * effectively disable the session cache by accident without anyone
|
---|
| 557 | * noticing).
|
---|
| 558 | */
|
---|
| 559 |
|
---|
| 560 | SSLerr(SSL_F_SSL_GET_PREV_SESSION,
|
---|
| 561 | SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED);
|
---|
| 562 | fatal = 1;
|
---|
| 563 | goto err;
|
---|
| 564 | }
|
---|
| 565 |
|
---|
| 566 | if (ret->cipher == NULL) {
|
---|
| 567 | unsigned char buf[5], *p;
|
---|
| 568 | unsigned long l;
|
---|
| 569 |
|
---|
| 570 | p = buf;
|
---|
| 571 | l = ret->cipher_id;
|
---|
| 572 | l2n(l, p);
|
---|
| 573 | if ((ret->ssl_version >> 8) >= SSL3_VERSION_MAJOR)
|
---|
| 574 | ret->cipher = ssl_get_cipher_by_char(s, &(buf[2]));
|
---|
| 575 | else
|
---|
| 576 | ret->cipher = ssl_get_cipher_by_char(s, &(buf[1]));
|
---|
| 577 | if (ret->cipher == NULL)
|
---|
| 578 | goto err;
|
---|
| 579 | }
|
---|
| 580 |
|
---|
| 581 | if (ret->timeout < (long)(time(NULL) - ret->time)) { /* timeout */
|
---|
| 582 | s->session_ctx->stats.sess_timeout++;
|
---|
| 583 | if (try_session_cache) {
|
---|
| 584 | /* session was from the cache, so remove it */
|
---|
| 585 | SSL_CTX_remove_session(s->session_ctx, ret);
|
---|
| 586 | }
|
---|
| 587 | goto err;
|
---|
| 588 | }
|
---|
| 589 |
|
---|
| 590 | /* Check extended master secret extension consistency */
|
---|
| 591 | if (ret->flags & SSL_SESS_FLAG_EXTMS) {
|
---|
| 592 | /* If old session includes extms, but new does not: abort handshake */
|
---|
| 593 | if (!(s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS)) {
|
---|
| 594 | SSLerr(SSL_F_SSL_GET_PREV_SESSION, SSL_R_INCONSISTENT_EXTMS);
|
---|
| 595 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
| 596 | fatal = 1;
|
---|
| 597 | goto err;
|
---|
| 598 | }
|
---|
| 599 | } else if (s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) {
|
---|
| 600 | /* If new session includes extms, but old does not: do not resume */
|
---|
| 601 | goto err;
|
---|
| 602 | }
|
---|
| 603 |
|
---|
| 604 | s->session_ctx->stats.sess_hit++;
|
---|
| 605 |
|
---|
| 606 | SSL_SESSION_free(s->session);
|
---|
| 607 | s->session = ret;
|
---|
| 608 | s->verify_result = s->session->verify_result;
|
---|
| 609 | return 1;
|
---|
| 610 |
|
---|
| 611 | err:
|
---|
| 612 | if (ret != NULL) {
|
---|
| 613 | SSL_SESSION_free(ret);
|
---|
| 614 |
|
---|
| 615 | if (!try_session_cache) {
|
---|
| 616 | /*
|
---|
| 617 | * The session was from a ticket, so we should issue a ticket for
|
---|
| 618 | * the new session
|
---|
| 619 | */
|
---|
| 620 | s->tlsext_ticket_expected = 1;
|
---|
| 621 | }
|
---|
| 622 | }
|
---|
| 623 | if (fatal)
|
---|
| 624 | return -1;
|
---|
| 625 | else
|
---|
| 626 | return 0;
|
---|
| 627 | }
|
---|
| 628 |
|
---|
| 629 | int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c)
|
---|
| 630 | {
|
---|
| 631 | int ret = 0;
|
---|
| 632 | SSL_SESSION *s;
|
---|
| 633 |
|
---|
| 634 | /*
|
---|
| 635 | * add just 1 reference count for the SSL_CTX's session cache even though
|
---|
| 636 | * it has two ways of access: each session is in a doubly linked list and
|
---|
| 637 | * an lhash
|
---|
| 638 | */
|
---|
| 639 | SSL_SESSION_up_ref(c);
|
---|
| 640 | /*
|
---|
| 641 | * if session c is in already in cache, we take back the increment later
|
---|
| 642 | */
|
---|
| 643 |
|
---|
| 644 | CRYPTO_THREAD_write_lock(ctx->lock);
|
---|
| 645 | s = lh_SSL_SESSION_insert(ctx->sessions, c);
|
---|
| 646 |
|
---|
| 647 | /*
|
---|
| 648 | * s != NULL iff we already had a session with the given PID. In this
|
---|
| 649 | * case, s == c should hold (then we did not really modify
|
---|
| 650 | * ctx->sessions), or we're in trouble.
|
---|
| 651 | */
|
---|
| 652 | if (s != NULL && s != c) {
|
---|
| 653 | /* We *are* in trouble ... */
|
---|
| 654 | SSL_SESSION_list_remove(ctx, s);
|
---|
| 655 | SSL_SESSION_free(s);
|
---|
| 656 | /*
|
---|
| 657 | * ... so pretend the other session did not exist in cache (we cannot
|
---|
| 658 | * handle two SSL_SESSION structures with identical session ID in the
|
---|
| 659 | * same cache, which could happen e.g. when two threads concurrently
|
---|
| 660 | * obtain the same session from an external cache)
|
---|
| 661 | */
|
---|
| 662 | s = NULL;
|
---|
| 663 | } else if (s == NULL &&
|
---|
| 664 | lh_SSL_SESSION_retrieve(ctx->sessions, c) == NULL) {
|
---|
| 665 | /* s == NULL can also mean OOM error in lh_SSL_SESSION_insert ... */
|
---|
| 666 |
|
---|
| 667 | /*
|
---|
| 668 | * ... so take back the extra reference and also don't add
|
---|
| 669 | * the session to the SSL_SESSION_list at this time
|
---|
| 670 | */
|
---|
| 671 | s = c;
|
---|
| 672 | }
|
---|
| 673 |
|
---|
| 674 | /* Put at the head of the queue unless it is already in the cache */
|
---|
| 675 | if (s == NULL)
|
---|
| 676 | SSL_SESSION_list_add(ctx, c);
|
---|
| 677 |
|
---|
| 678 | if (s != NULL) {
|
---|
| 679 | /*
|
---|
| 680 | * existing cache entry -- decrement previously incremented reference
|
---|
| 681 | * count because it already takes into account the cache
|
---|
| 682 | */
|
---|
| 683 |
|
---|
| 684 | SSL_SESSION_free(s); /* s == c */
|
---|
| 685 | ret = 0;
|
---|
| 686 | } else {
|
---|
| 687 | /*
|
---|
| 688 | * new cache entry -- remove old ones if cache has become too large
|
---|
| 689 | */
|
---|
| 690 |
|
---|
| 691 | ret = 1;
|
---|
| 692 |
|
---|
| 693 | if (SSL_CTX_sess_get_cache_size(ctx) > 0) {
|
---|
| 694 | while (SSL_CTX_sess_number(ctx) > SSL_CTX_sess_get_cache_size(ctx)) {
|
---|
| 695 | if (!remove_session_lock(ctx, ctx->session_cache_tail, 0))
|
---|
| 696 | break;
|
---|
| 697 | else
|
---|
| 698 | ctx->stats.sess_cache_full++;
|
---|
| 699 | }
|
---|
| 700 | }
|
---|
| 701 | }
|
---|
| 702 | CRYPTO_THREAD_unlock(ctx->lock);
|
---|
| 703 | return ret;
|
---|
| 704 | }
|
---|
| 705 |
|
---|
| 706 | int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c)
|
---|
| 707 | {
|
---|
| 708 | return remove_session_lock(ctx, c, 1);
|
---|
| 709 | }
|
---|
| 710 |
|
---|
| 711 | static int remove_session_lock(SSL_CTX *ctx, SSL_SESSION *c, int lck)
|
---|
| 712 | {
|
---|
| 713 | SSL_SESSION *r;
|
---|
| 714 | int ret = 0;
|
---|
| 715 |
|
---|
| 716 | if ((c != NULL) && (c->session_id_length != 0)) {
|
---|
| 717 | if (lck)
|
---|
| 718 | CRYPTO_THREAD_write_lock(ctx->lock);
|
---|
| 719 | if ((r = lh_SSL_SESSION_retrieve(ctx->sessions, c)) == c) {
|
---|
| 720 | ret = 1;
|
---|
| 721 | r = lh_SSL_SESSION_delete(ctx->sessions, c);
|
---|
| 722 | SSL_SESSION_list_remove(ctx, c);
|
---|
| 723 | }
|
---|
| 724 | c->not_resumable = 1;
|
---|
| 725 |
|
---|
| 726 | if (lck)
|
---|
| 727 | CRYPTO_THREAD_unlock(ctx->lock);
|
---|
| 728 |
|
---|
| 729 | if (ret)
|
---|
| 730 | SSL_SESSION_free(r);
|
---|
| 731 |
|
---|
| 732 | if (ctx->remove_session_cb != NULL)
|
---|
| 733 | ctx->remove_session_cb(ctx, c);
|
---|
| 734 | } else
|
---|
| 735 | ret = 0;
|
---|
| 736 | return (ret);
|
---|
| 737 | }
|
---|
| 738 |
|
---|
| 739 | void SSL_SESSION_free(SSL_SESSION *ss)
|
---|
| 740 | {
|
---|
| 741 | int i;
|
---|
| 742 |
|
---|
| 743 | if (ss == NULL)
|
---|
| 744 | return;
|
---|
| 745 |
|
---|
| 746 | CRYPTO_atomic_add(&ss->references, -1, &i, ss->lock);
|
---|
| 747 | REF_PRINT_COUNT("SSL_SESSION", ss);
|
---|
| 748 | if (i > 0)
|
---|
| 749 | return;
|
---|
| 750 | REF_ASSERT_ISNT(i < 0);
|
---|
| 751 |
|
---|
| 752 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_SESSION, ss, &ss->ex_data);
|
---|
| 753 |
|
---|
| 754 | OPENSSL_cleanse(ss->master_key, sizeof ss->master_key);
|
---|
| 755 | OPENSSL_cleanse(ss->session_id, sizeof ss->session_id);
|
---|
| 756 | X509_free(ss->peer);
|
---|
| 757 | sk_X509_pop_free(ss->peer_chain, X509_free);
|
---|
| 758 | sk_SSL_CIPHER_free(ss->ciphers);
|
---|
| 759 | OPENSSL_free(ss->tlsext_hostname);
|
---|
| 760 | OPENSSL_free(ss->tlsext_tick);
|
---|
| 761 | #ifndef OPENSSL_NO_EC
|
---|
| 762 | ss->tlsext_ecpointformatlist_length = 0;
|
---|
| 763 | OPENSSL_free(ss->tlsext_ecpointformatlist);
|
---|
| 764 | ss->tlsext_ellipticcurvelist_length = 0;
|
---|
| 765 | OPENSSL_free(ss->tlsext_ellipticcurvelist);
|
---|
| 766 | #endif /* OPENSSL_NO_EC */
|
---|
| 767 | #ifndef OPENSSL_NO_PSK
|
---|
| 768 | OPENSSL_free(ss->psk_identity_hint);
|
---|
| 769 | OPENSSL_free(ss->psk_identity);
|
---|
| 770 | #endif
|
---|
| 771 | #ifndef OPENSSL_NO_SRP
|
---|
| 772 | OPENSSL_free(ss->srp_username);
|
---|
| 773 | #endif
|
---|
| 774 | CRYPTO_THREAD_lock_free(ss->lock);
|
---|
| 775 | OPENSSL_clear_free(ss, sizeof(*ss));
|
---|
| 776 | }
|
---|
| 777 |
|
---|
| 778 | int SSL_SESSION_up_ref(SSL_SESSION *ss)
|
---|
| 779 | {
|
---|
| 780 | int i;
|
---|
| 781 |
|
---|
| 782 | if (CRYPTO_atomic_add(&ss->references, 1, &i, ss->lock) <= 0)
|
---|
| 783 | return 0;
|
---|
| 784 |
|
---|
| 785 | REF_PRINT_COUNT("SSL_SESSION", ss);
|
---|
| 786 | REF_ASSERT_ISNT(i < 2);
|
---|
| 787 | return ((i > 1) ? 1 : 0);
|
---|
| 788 | }
|
---|
| 789 |
|
---|
| 790 | int SSL_set_session(SSL *s, SSL_SESSION *session)
|
---|
| 791 | {
|
---|
| 792 | ssl_clear_bad_session(s);
|
---|
| 793 | if (s->ctx->method != s->method) {
|
---|
| 794 | if (!SSL_set_ssl_method(s, s->ctx->method))
|
---|
| 795 | return 0;
|
---|
| 796 | }
|
---|
| 797 |
|
---|
| 798 | if (session != NULL) {
|
---|
| 799 | SSL_SESSION_up_ref(session);
|
---|
| 800 | s->verify_result = session->verify_result;
|
---|
| 801 | }
|
---|
| 802 | SSL_SESSION_free(s->session);
|
---|
| 803 | s->session = session;
|
---|
| 804 |
|
---|
| 805 | return 1;
|
---|
| 806 | }
|
---|
| 807 |
|
---|
| 808 | int SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid,
|
---|
| 809 | unsigned int sid_len)
|
---|
| 810 | {
|
---|
| 811 | if (sid_len > SSL_MAX_SSL_SESSION_ID_LENGTH) {
|
---|
| 812 | SSLerr(SSL_F_SSL_SESSION_SET1_ID,
|
---|
| 813 | SSL_R_SSL_SESSION_ID_TOO_LONG);
|
---|
| 814 | return 0;
|
---|
| 815 | }
|
---|
| 816 | s->session_id_length = sid_len;
|
---|
| 817 | memcpy(s->session_id, sid, sid_len);
|
---|
| 818 | return 1;
|
---|
| 819 | }
|
---|
| 820 |
|
---|
| 821 | long SSL_SESSION_set_timeout(SSL_SESSION *s, long t)
|
---|
| 822 | {
|
---|
| 823 | if (s == NULL)
|
---|
| 824 | return (0);
|
---|
| 825 | s->timeout = t;
|
---|
| 826 | return (1);
|
---|
| 827 | }
|
---|
| 828 |
|
---|
| 829 | long SSL_SESSION_get_timeout(const SSL_SESSION *s)
|
---|
| 830 | {
|
---|
| 831 | if (s == NULL)
|
---|
| 832 | return (0);
|
---|
| 833 | return (s->timeout);
|
---|
| 834 | }
|
---|
| 835 |
|
---|
| 836 | long SSL_SESSION_get_time(const SSL_SESSION *s)
|
---|
| 837 | {
|
---|
| 838 | if (s == NULL)
|
---|
| 839 | return (0);
|
---|
| 840 | return (s->time);
|
---|
| 841 | }
|
---|
| 842 |
|
---|
| 843 | long SSL_SESSION_set_time(SSL_SESSION *s, long t)
|
---|
| 844 | {
|
---|
| 845 | if (s == NULL)
|
---|
| 846 | return (0);
|
---|
| 847 | s->time = t;
|
---|
| 848 | return (t);
|
---|
| 849 | }
|
---|
| 850 |
|
---|
| 851 | int SSL_SESSION_get_protocol_version(const SSL_SESSION *s)
|
---|
| 852 | {
|
---|
| 853 | return s->ssl_version;
|
---|
| 854 | }
|
---|
| 855 |
|
---|
| 856 | const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *s)
|
---|
| 857 | {
|
---|
| 858 | return s->cipher;
|
---|
| 859 | }
|
---|
| 860 |
|
---|
| 861 | const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s)
|
---|
| 862 | {
|
---|
| 863 | return s->tlsext_hostname;
|
---|
| 864 | }
|
---|
| 865 |
|
---|
| 866 | int SSL_SESSION_has_ticket(const SSL_SESSION *s)
|
---|
| 867 | {
|
---|
| 868 | return (s->tlsext_ticklen > 0) ? 1 : 0;
|
---|
| 869 | }
|
---|
| 870 |
|
---|
| 871 | unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s)
|
---|
| 872 | {
|
---|
| 873 | return s->tlsext_tick_lifetime_hint;
|
---|
| 874 | }
|
---|
| 875 |
|
---|
| 876 | void SSL_SESSION_get0_ticket(const SSL_SESSION *s, const unsigned char **tick,
|
---|
| 877 | size_t *len)
|
---|
| 878 | {
|
---|
| 879 | *len = s->tlsext_ticklen;
|
---|
| 880 | if (tick != NULL)
|
---|
| 881 | *tick = s->tlsext_tick;
|
---|
| 882 | }
|
---|
| 883 |
|
---|
| 884 | X509 *SSL_SESSION_get0_peer(SSL_SESSION *s)
|
---|
| 885 | {
|
---|
| 886 | return s->peer;
|
---|
| 887 | }
|
---|
| 888 |
|
---|
| 889 | int SSL_SESSION_set1_id_context(SSL_SESSION *s, const unsigned char *sid_ctx,
|
---|
| 890 | unsigned int sid_ctx_len)
|
---|
| 891 | {
|
---|
| 892 | if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) {
|
---|
| 893 | SSLerr(SSL_F_SSL_SESSION_SET1_ID_CONTEXT,
|
---|
| 894 | SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
|
---|
| 895 | return 0;
|
---|
| 896 | }
|
---|
| 897 | s->sid_ctx_length = sid_ctx_len;
|
---|
| 898 | memcpy(s->sid_ctx, sid_ctx, sid_ctx_len);
|
---|
| 899 |
|
---|
| 900 | return 1;
|
---|
| 901 | }
|
---|
| 902 |
|
---|
| 903 | long SSL_CTX_set_timeout(SSL_CTX *s, long t)
|
---|
| 904 | {
|
---|
| 905 | long l;
|
---|
| 906 | if (s == NULL)
|
---|
| 907 | return (0);
|
---|
| 908 | l = s->session_timeout;
|
---|
| 909 | s->session_timeout = t;
|
---|
| 910 | return (l);
|
---|
| 911 | }
|
---|
| 912 |
|
---|
| 913 | long SSL_CTX_get_timeout(const SSL_CTX *s)
|
---|
| 914 | {
|
---|
| 915 | if (s == NULL)
|
---|
| 916 | return (0);
|
---|
| 917 | return (s->session_timeout);
|
---|
| 918 | }
|
---|
| 919 |
|
---|
| 920 | int SSL_set_session_secret_cb(SSL *s,
|
---|
| 921 | int (*tls_session_secret_cb) (SSL *s,
|
---|
| 922 | void *secret,
|
---|
| 923 | int *secret_len,
|
---|
| 924 | STACK_OF(SSL_CIPHER)
|
---|
| 925 | *peer_ciphers,
|
---|
| 926 | const SSL_CIPHER
|
---|
| 927 | **cipher,
|
---|
| 928 | void *arg),
|
---|
| 929 | void *arg)
|
---|
| 930 | {
|
---|
| 931 | if (s == NULL)
|
---|
| 932 | return (0);
|
---|
| 933 | s->tls_session_secret_cb = tls_session_secret_cb;
|
---|
| 934 | s->tls_session_secret_cb_arg = arg;
|
---|
| 935 | return (1);
|
---|
| 936 | }
|
---|
| 937 |
|
---|
| 938 | int SSL_set_session_ticket_ext_cb(SSL *s, tls_session_ticket_ext_cb_fn cb,
|
---|
| 939 | void *arg)
|
---|
| 940 | {
|
---|
| 941 | if (s == NULL)
|
---|
| 942 | return (0);
|
---|
| 943 | s->tls_session_ticket_ext_cb = cb;
|
---|
| 944 | s->tls_session_ticket_ext_cb_arg = arg;
|
---|
| 945 | return (1);
|
---|
| 946 | }
|
---|
| 947 |
|
---|
| 948 | int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len)
|
---|
| 949 | {
|
---|
| 950 | if (s->version >= TLS1_VERSION) {
|
---|
| 951 | OPENSSL_free(s->tlsext_session_ticket);
|
---|
| 952 | s->tlsext_session_ticket = NULL;
|
---|
| 953 | s->tlsext_session_ticket =
|
---|
| 954 | OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len);
|
---|
| 955 | if (s->tlsext_session_ticket == NULL) {
|
---|
| 956 | SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE);
|
---|
| 957 | return 0;
|
---|
| 958 | }
|
---|
| 959 |
|
---|
| 960 | if (ext_data) {
|
---|
| 961 | s->tlsext_session_ticket->length = ext_len;
|
---|
| 962 | s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1;
|
---|
| 963 | memcpy(s->tlsext_session_ticket->data, ext_data, ext_len);
|
---|
| 964 | } else {
|
---|
| 965 | s->tlsext_session_ticket->length = 0;
|
---|
| 966 | s->tlsext_session_ticket->data = NULL;
|
---|
| 967 | }
|
---|
| 968 |
|
---|
| 969 | return 1;
|
---|
| 970 | }
|
---|
| 971 |
|
---|
| 972 | return 0;
|
---|
| 973 | }
|
---|
| 974 |
|
---|
| 975 | typedef struct timeout_param_st {
|
---|
| 976 | SSL_CTX *ctx;
|
---|
| 977 | long time;
|
---|
| 978 | LHASH_OF(SSL_SESSION) *cache;
|
---|
| 979 | } TIMEOUT_PARAM;
|
---|
| 980 |
|
---|
| 981 | static void timeout_cb(SSL_SESSION *s, TIMEOUT_PARAM *p)
|
---|
| 982 | {
|
---|
| 983 | if ((p->time == 0) || (p->time > (s->time + s->timeout))) { /* timeout */
|
---|
| 984 | /*
|
---|
| 985 | * The reason we don't call SSL_CTX_remove_session() is to save on
|
---|
| 986 | * locking overhead
|
---|
| 987 | */
|
---|
| 988 | (void)lh_SSL_SESSION_delete(p->cache, s);
|
---|
| 989 | SSL_SESSION_list_remove(p->ctx, s);
|
---|
| 990 | s->not_resumable = 1;
|
---|
| 991 | if (p->ctx->remove_session_cb != NULL)
|
---|
| 992 | p->ctx->remove_session_cb(p->ctx, s);
|
---|
| 993 | SSL_SESSION_free(s);
|
---|
| 994 | }
|
---|
| 995 | }
|
---|
| 996 |
|
---|
| 997 | IMPLEMENT_LHASH_DOALL_ARG(SSL_SESSION, TIMEOUT_PARAM);
|
---|
| 998 |
|
---|
| 999 | void SSL_CTX_flush_sessions(SSL_CTX *s, long t)
|
---|
| 1000 | {
|
---|
| 1001 | unsigned long i;
|
---|
| 1002 | TIMEOUT_PARAM tp;
|
---|
| 1003 |
|
---|
| 1004 | tp.ctx = s;
|
---|
| 1005 | tp.cache = s->sessions;
|
---|
| 1006 | if (tp.cache == NULL)
|
---|
| 1007 | return;
|
---|
| 1008 | tp.time = t;
|
---|
| 1009 | CRYPTO_THREAD_write_lock(s->lock);
|
---|
| 1010 | i = lh_SSL_SESSION_get_down_load(s->sessions);
|
---|
| 1011 | lh_SSL_SESSION_set_down_load(s->sessions, 0);
|
---|
| 1012 | lh_SSL_SESSION_doall_TIMEOUT_PARAM(tp.cache, timeout_cb, &tp);
|
---|
| 1013 | lh_SSL_SESSION_set_down_load(s->sessions, i);
|
---|
| 1014 | CRYPTO_THREAD_unlock(s->lock);
|
---|
| 1015 | }
|
---|
| 1016 |
|
---|
| 1017 | int ssl_clear_bad_session(SSL *s)
|
---|
| 1018 | {
|
---|
| 1019 | if ((s->session != NULL) &&
|
---|
| 1020 | !(s->shutdown & SSL_SENT_SHUTDOWN) &&
|
---|
| 1021 | !(SSL_in_init(s) || SSL_in_before(s))) {
|
---|
| 1022 | SSL_CTX_remove_session(s->session_ctx, s->session);
|
---|
| 1023 | return (1);
|
---|
| 1024 | } else
|
---|
| 1025 | return (0);
|
---|
| 1026 | }
|
---|
| 1027 |
|
---|
| 1028 | /* locked by SSL_CTX in the calling function */
|
---|
| 1029 | static void SSL_SESSION_list_remove(SSL_CTX *ctx, SSL_SESSION *s)
|
---|
| 1030 | {
|
---|
| 1031 | if ((s->next == NULL) || (s->prev == NULL))
|
---|
| 1032 | return;
|
---|
| 1033 |
|
---|
| 1034 | if (s->next == (SSL_SESSION *)&(ctx->session_cache_tail)) {
|
---|
| 1035 | /* last element in list */
|
---|
| 1036 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
|
---|
| 1037 | /* only one element in list */
|
---|
| 1038 | ctx->session_cache_head = NULL;
|
---|
| 1039 | ctx->session_cache_tail = NULL;
|
---|
| 1040 | } else {
|
---|
| 1041 | ctx->session_cache_tail = s->prev;
|
---|
| 1042 | s->prev->next = (SSL_SESSION *)&(ctx->session_cache_tail);
|
---|
| 1043 | }
|
---|
| 1044 | } else {
|
---|
| 1045 | if (s->prev == (SSL_SESSION *)&(ctx->session_cache_head)) {
|
---|
| 1046 | /* first element in list */
|
---|
| 1047 | ctx->session_cache_head = s->next;
|
---|
| 1048 | s->next->prev = (SSL_SESSION *)&(ctx->session_cache_head);
|
---|
| 1049 | } else {
|
---|
| 1050 | /* middle of list */
|
---|
| 1051 | s->next->prev = s->prev;
|
---|
| 1052 | s->prev->next = s->next;
|
---|
| 1053 | }
|
---|
| 1054 | }
|
---|
| 1055 | s->prev = s->next = NULL;
|
---|
| 1056 | }
|
---|
| 1057 |
|
---|
| 1058 | static void SSL_SESSION_list_add(SSL_CTX *ctx, SSL_SESSION *s)
|
---|
| 1059 | {
|
---|
| 1060 | if ((s->next != NULL) && (s->prev != NULL))
|
---|
| 1061 | SSL_SESSION_list_remove(ctx, s);
|
---|
| 1062 |
|
---|
| 1063 | if (ctx->session_cache_head == NULL) {
|
---|
| 1064 | ctx->session_cache_head = s;
|
---|
| 1065 | ctx->session_cache_tail = s;
|
---|
| 1066 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
|
---|
| 1067 | s->next = (SSL_SESSION *)&(ctx->session_cache_tail);
|
---|
| 1068 | } else {
|
---|
| 1069 | s->next = ctx->session_cache_head;
|
---|
| 1070 | s->next->prev = s;
|
---|
| 1071 | s->prev = (SSL_SESSION *)&(ctx->session_cache_head);
|
---|
| 1072 | ctx->session_cache_head = s;
|
---|
| 1073 | }
|
---|
| 1074 | }
|
---|
| 1075 |
|
---|
| 1076 | void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
|
---|
| 1077 | int (*cb) (struct ssl_st *ssl, SSL_SESSION *sess))
|
---|
| 1078 | {
|
---|
| 1079 | ctx->new_session_cb = cb;
|
---|
| 1080 | }
|
---|
| 1081 |
|
---|
| 1082 | int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx)) (SSL *ssl, SSL_SESSION *sess) {
|
---|
| 1083 | return ctx->new_session_cb;
|
---|
| 1084 | }
|
---|
| 1085 |
|
---|
| 1086 | void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
|
---|
| 1087 | void (*cb) (SSL_CTX *ctx, SSL_SESSION *sess))
|
---|
| 1088 | {
|
---|
| 1089 | ctx->remove_session_cb = cb;
|
---|
| 1090 | }
|
---|
| 1091 |
|
---|
| 1092 | void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx)) (SSL_CTX *ctx,
|
---|
| 1093 | SSL_SESSION *sess) {
|
---|
| 1094 | return ctx->remove_session_cb;
|
---|
| 1095 | }
|
---|
| 1096 |
|
---|
| 1097 | void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
|
---|
| 1098 | SSL_SESSION *(*cb) (struct ssl_st *ssl,
|
---|
| 1099 | const unsigned char *data,
|
---|
| 1100 | int len, int *copy))
|
---|
| 1101 | {
|
---|
| 1102 | ctx->get_session_cb = cb;
|
---|
| 1103 | }
|
---|
| 1104 |
|
---|
| 1105 | SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx)) (SSL *ssl,
|
---|
| 1106 | const unsigned char
|
---|
| 1107 | *data, int len,
|
---|
| 1108 | int *copy) {
|
---|
| 1109 | return ctx->get_session_cb;
|
---|
| 1110 | }
|
---|
| 1111 |
|
---|
| 1112 | void SSL_CTX_set_info_callback(SSL_CTX *ctx,
|
---|
| 1113 | void (*cb) (const SSL *ssl, int type, int val))
|
---|
| 1114 | {
|
---|
| 1115 | ctx->info_callback = cb;
|
---|
| 1116 | }
|
---|
| 1117 |
|
---|
| 1118 | void (*SSL_CTX_get_info_callback(SSL_CTX *ctx)) (const SSL *ssl, int type,
|
---|
| 1119 | int val) {
|
---|
| 1120 | return ctx->info_callback;
|
---|
| 1121 | }
|
---|
| 1122 |
|
---|
| 1123 | void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
|
---|
| 1124 | int (*cb) (SSL *ssl, X509 **x509,
|
---|
| 1125 | EVP_PKEY **pkey))
|
---|
| 1126 | {
|
---|
| 1127 | ctx->client_cert_cb = cb;
|
---|
| 1128 | }
|
---|
| 1129 |
|
---|
| 1130 | int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx)) (SSL *ssl, X509 **x509,
|
---|
| 1131 | EVP_PKEY **pkey) {
|
---|
| 1132 | return ctx->client_cert_cb;
|
---|
| 1133 | }
|
---|
| 1134 |
|
---|
| 1135 | #ifndef OPENSSL_NO_ENGINE
|
---|
| 1136 | int SSL_CTX_set_client_cert_engine(SSL_CTX *ctx, ENGINE *e)
|
---|
| 1137 | {
|
---|
| 1138 | if (!ENGINE_init(e)) {
|
---|
| 1139 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE, ERR_R_ENGINE_LIB);
|
---|
| 1140 | return 0;
|
---|
| 1141 | }
|
---|
| 1142 | if (!ENGINE_get_ssl_client_cert_function(e)) {
|
---|
| 1143 | SSLerr(SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE,
|
---|
| 1144 | SSL_R_NO_CLIENT_CERT_METHOD);
|
---|
| 1145 | ENGINE_finish(e);
|
---|
| 1146 | return 0;
|
---|
| 1147 | }
|
---|
| 1148 | ctx->client_cert_engine = e;
|
---|
| 1149 | return 1;
|
---|
| 1150 | }
|
---|
| 1151 | #endif
|
---|
| 1152 |
|
---|
| 1153 | void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
|
---|
| 1154 | int (*cb) (SSL *ssl,
|
---|
| 1155 | unsigned char *cookie,
|
---|
| 1156 | unsigned int *cookie_len))
|
---|
| 1157 | {
|
---|
| 1158 | ctx->app_gen_cookie_cb = cb;
|
---|
| 1159 | }
|
---|
| 1160 |
|
---|
| 1161 | void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
|
---|
| 1162 | int (*cb) (SSL *ssl,
|
---|
| 1163 | const unsigned char *cookie,
|
---|
| 1164 | unsigned int cookie_len))
|
---|
| 1165 | {
|
---|
| 1166 | ctx->app_verify_cookie_cb = cb;
|
---|
| 1167 | }
|
---|
| 1168 |
|
---|
| 1169 | IMPLEMENT_PEM_rw(SSL_SESSION, SSL_SESSION, PEM_STRING_SSL_SESSION, SSL_SESSION)
|
---|