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      1 /*! \file ssl/ssl_lib.c
      2  *  \brief Version independent SSL functions.
      3  */
      4 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      5  * All rights reserved.
      6  *
      7  * This package is an SSL implementation written
      8  * by Eric Young (eay (at) cryptsoft.com).
      9  * The implementation was written so as to conform with Netscapes SSL.
     10  *
     11  * This library is free for commercial and non-commercial use as long as
     12  * the following conditions are aheared to.  The following conditions
     13  * apply to all code found in this distribution, be it the RC4, RSA,
     14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
     15  * included with this distribution is covered by the same copyright terms
     16  * except that the holder is Tim Hudson (tjh (at) cryptsoft.com).
     17  *
     18  * Copyright remains Eric Young's, and as such any Copyright notices in
     19  * the code are not to be removed.
     20  * If this package is used in a product, Eric Young should be given attribution
     21  * as the author of the parts of the library used.
     22  * This can be in the form of a textual message at program startup or
     23  * in documentation (online or textual) provided with the package.
     24  *
     25  * Redistribution and use in source and binary forms, with or without
     26  * modification, are permitted provided that the following conditions
     27  * are met:
     28  * 1. Redistributions of source code must retain the copyright
     29  *    notice, this list of conditions and the following disclaimer.
     30  * 2. Redistributions in binary form must reproduce the above copyright
     31  *    notice, this list of conditions and the following disclaimer in the
     32  *    documentation and/or other materials provided with the distribution.
     33  * 3. All advertising materials mentioning features or use of this software
     34  *    must display the following acknowledgement:
     35  *    "This product includes cryptographic software written by
     36  *     Eric Young (eay (at) cryptsoft.com)"
     37  *    The word 'cryptographic' can be left out if the rouines from the library
     38  *    being used are not cryptographic related :-).
     39  * 4. If you include any Windows specific code (or a derivative thereof) from
     40  *    the apps directory (application code) you must include an acknowledgement:
     41  *    "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)"
     42  *
     43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
     44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     53  * SUCH DAMAGE.
     54  *
     55  * The licence and distribution terms for any publically available version or
     56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
     57  * copied and put under another distribution licence
     58  * [including the GNU Public Licence.]
     59  */
     60 /* ====================================================================
     61  * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
     62  *
     63  * Redistribution and use in source and binary forms, with or without
     64  * modification, are permitted provided that the following conditions
     65  * are met:
     66  *
     67  * 1. Redistributions of source code must retain the above copyright
     68  *    notice, this list of conditions and the following disclaimer.
     69  *
     70  * 2. Redistributions in binary form must reproduce the above copyright
     71  *    notice, this list of conditions and the following disclaimer in
     72  *    the documentation and/or other materials provided with the
     73  *    distribution.
     74  *
     75  * 3. All advertising materials mentioning features or use of this
     76  *    software must display the following acknowledgment:
     77  *    "This product includes software developed by the OpenSSL Project
     78  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
     79  *
     80  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
     81  *    endorse or promote products derived from this software without
     82  *    prior written permission. For written permission, please contact
     83  *    openssl-core (at) openssl.org.
     84  *
     85  * 5. Products derived from this software may not be called "OpenSSL"
     86  *    nor may "OpenSSL" appear in their names without prior written
     87  *    permission of the OpenSSL Project.
     88  *
     89  * 6. Redistributions of any form whatsoever must retain the following
     90  *    acknowledgment:
     91  *    "This product includes software developed by the OpenSSL Project
     92  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
     93  *
     94  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
     95  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     97  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
     98  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     99  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    100  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    101  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    102  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
    103  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    104  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
    105  * OF THE POSSIBILITY OF SUCH DAMAGE.
    106  * ====================================================================
    107  *
    108  * This product includes cryptographic software written by Eric Young
    109  * (eay (at) cryptsoft.com).  This product includes software written by Tim
    110  * Hudson (tjh (at) cryptsoft.com).
    111  *
    112  */
    113 /* ====================================================================
    114  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
    115  * ECC cipher suite support in OpenSSL originally developed by
    116  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
    117  */
    118 
    119 #ifdef REF_CHECK
    120 #  include <assert.h>
    121 #endif
    122 #include <stdio.h>
    123 #include "ssl_locl.h"
    124 #include "kssl_lcl.h"
    125 #include <openssl/objects.h>
    126 #include <openssl/lhash.h>
    127 #include <openssl/x509v3.h>
    128 #include <openssl/rand.h>
    129 #include <openssl/ocsp.h>
    130 #ifndef OPENSSL_NO_DH
    131 #include <openssl/dh.h>
    132 #endif
    133 #ifndef OPENSSL_NO_ENGINE
    134 #include <openssl/engine.h>
    135 #endif
    136 
    137 const char *SSL_version_str=OPENSSL_VERSION_TEXT;
    138 
    139 SSL3_ENC_METHOD ssl3_undef_enc_method={
    140 	/* evil casts, but these functions are only called if there's a library bug */
    141 	(int (*)(SSL *,int))ssl_undefined_function,
    142 	(int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
    143 	ssl_undefined_function,
    144 	(int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
    145 	(int (*)(SSL*, int))ssl_undefined_function,
    146 	(int (*)(SSL *, EVP_MD_CTX *, EVP_MD_CTX *, const char*, int, unsigned char *))ssl_undefined_function,
    147 	0,	/* finish_mac_length */
    148 	(int (*)(SSL *, EVP_MD_CTX *, unsigned char *))ssl_undefined_function,
    149 	NULL,	/* client_finished_label */
    150 	0,	/* client_finished_label_len */
    151 	NULL,	/* server_finished_label */
    152 	0,	/* server_finished_label_len */
    153 	(int (*)(int))ssl_undefined_function
    154 	};
    155 
    156 int SSL_clear(SSL *s)
    157 	{
    158 
    159 	if (s->method == NULL)
    160 		{
    161 		SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
    162 		return(0);
    163 		}
    164 
    165 	if (ssl_clear_bad_session(s))
    166 		{
    167 		SSL_SESSION_free(s->session);
    168 		s->session=NULL;
    169 		}
    170 
    171 	s->error=0;
    172 	s->hit=0;
    173 	s->shutdown=0;
    174 
    175 #if 0 /* Disabled since version 1.10 of this file (early return not
    176        * needed because SSL_clear is not called when doing renegotiation) */
    177 	/* This is set if we are doing dynamic renegotiation so keep
    178 	 * the old cipher.  It is sort of a SSL_clear_lite :-) */
    179 	if (s->new_session) return(1);
    180 #else
    181 	if (s->new_session)
    182 		{
    183 		SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
    184 		return 0;
    185 		}
    186 #endif
    187 
    188 	s->type=0;
    189 
    190 	s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
    191 
    192 	s->version=s->method->version;
    193 	s->client_version=s->version;
    194 	s->rwstate=SSL_NOTHING;
    195 	s->rstate=SSL_ST_READ_HEADER;
    196 #if 0
    197 	s->read_ahead=s->ctx->read_ahead;
    198 #endif
    199 
    200 	if (s->init_buf != NULL)
    201 		{
    202 		BUF_MEM_free(s->init_buf);
    203 		s->init_buf=NULL;
    204 		}
    205 
    206 	ssl_clear_cipher_ctx(s);
    207 
    208 	s->first_packet=0;
    209 
    210 #if 1
    211 	/* Check to see if we were changed into a different method, if
    212 	 * so, revert back if we are not doing session-id reuse. */
    213 	if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
    214 		{
    215 		s->method->ssl_free(s);
    216 		s->method=s->ctx->method;
    217 		if (!s->method->ssl_new(s))
    218 			return(0);
    219 		}
    220 	else
    221 #endif
    222 		s->method->ssl_clear(s);
    223 	return(1);
    224 	}
    225 
    226 /** Used to change an SSL_CTXs default SSL method type */
    227 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
    228 	{
    229 	STACK_OF(SSL_CIPHER) *sk;
    230 
    231 	ctx->method=meth;
    232 
    233 	sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
    234 		&(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
    235 	if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
    236 		{
    237 		SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
    238 		return(0);
    239 		}
    240 	return(1);
    241 	}
    242 
    243 SSL *SSL_new(SSL_CTX *ctx)
    244 	{
    245 	SSL *s;
    246 
    247 	if (ctx == NULL)
    248 		{
    249 		SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
    250 		return(NULL);
    251 		}
    252 	if (ctx->method == NULL)
    253 		{
    254 		SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
    255 		return(NULL);
    256 		}
    257 
    258 	s=(SSL *)OPENSSL_malloc(sizeof(SSL));
    259 	if (s == NULL) goto err;
    260 	memset(s,0,sizeof(SSL));
    261 
    262 #ifndef	OPENSSL_NO_KRB5
    263 	s->kssl_ctx = kssl_ctx_new();
    264 #endif	/* OPENSSL_NO_KRB5 */
    265 
    266 	s->options=ctx->options;
    267 	s->mode=ctx->mode;
    268 	s->max_cert_list=ctx->max_cert_list;
    269 
    270 	if (ctx->cert != NULL)
    271 		{
    272 		/* Earlier library versions used to copy the pointer to
    273 		 * the CERT, not its contents; only when setting new
    274 		 * parameters for the per-SSL copy, ssl_cert_new would be
    275 		 * called (and the direct reference to the per-SSL_CTX
    276 		 * settings would be lost, but those still were indirectly
    277 		 * accessed for various purposes, and for that reason they
    278 		 * used to be known as s->ctx->default_cert).
    279 		 * Now we don't look at the SSL_CTX's CERT after having
    280 		 * duplicated it once. */
    281 
    282 		s->cert = ssl_cert_dup(ctx->cert);
    283 		if (s->cert == NULL)
    284 			goto err;
    285 		}
    286 	else
    287 		s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
    288 
    289 	s->read_ahead=ctx->read_ahead;
    290 	s->msg_callback=ctx->msg_callback;
    291 	s->msg_callback_arg=ctx->msg_callback_arg;
    292 	s->verify_mode=ctx->verify_mode;
    293 #if 0
    294 	s->verify_depth=ctx->verify_depth;
    295 #endif
    296 	s->sid_ctx_length=ctx->sid_ctx_length;
    297 	OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
    298 	memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
    299 	s->verify_callback=ctx->default_verify_callback;
    300 	s->generate_session_id=ctx->generate_session_id;
    301 
    302 	s->param = X509_VERIFY_PARAM_new();
    303 	if (!s->param)
    304 		goto err;
    305 	X509_VERIFY_PARAM_inherit(s->param, ctx->param);
    306 #if 0
    307 	s->purpose = ctx->purpose;
    308 	s->trust = ctx->trust;
    309 #endif
    310 	s->quiet_shutdown=ctx->quiet_shutdown;
    311 
    312 	CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
    313 	s->ctx=ctx;
    314 #ifndef OPENSSL_NO_TLSEXT
    315 	s->tlsext_debug_cb = 0;
    316 	s->tlsext_debug_arg = NULL;
    317 	s->tlsext_ticket_expected = 0;
    318 	s->tlsext_status_type = -1;
    319 	s->tlsext_status_expected = 0;
    320 	s->tlsext_ocsp_ids = NULL;
    321 	s->tlsext_ocsp_exts = NULL;
    322 	s->tlsext_ocsp_resp = NULL;
    323 	s->tlsext_ocsp_resplen = -1;
    324 	CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
    325 	s->initial_ctx=ctx;
    326 #endif
    327 	s->verify_result=X509_V_OK;
    328 
    329 	s->method=ctx->method;
    330 
    331 	if (!s->method->ssl_new(s))
    332 		goto err;
    333 
    334 	s->references=1;
    335 	s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
    336 
    337 	SSL_clear(s);
    338 
    339 	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
    340 
    341 	return(s);
    342 err:
    343 	if (s != NULL)
    344 		{
    345 		if (s->cert != NULL)
    346 			ssl_cert_free(s->cert);
    347 		if (s->ctx != NULL)
    348 			SSL_CTX_free(s->ctx); /* decrement reference count */
    349 		OPENSSL_free(s);
    350 		}
    351 	SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
    352 	return(NULL);
    353 	}
    354 
    355 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
    356 				   unsigned int sid_ctx_len)
    357     {
    358     if(sid_ctx_len > sizeof ctx->sid_ctx)
    359 	{
    360 	SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
    361 	return 0;
    362 	}
    363     ctx->sid_ctx_length=sid_ctx_len;
    364     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
    365 
    366     return 1;
    367     }
    368 
    369 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
    370 			       unsigned int sid_ctx_len)
    371     {
    372     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
    373 	{
    374 	SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
    375 	return 0;
    376 	}
    377     ssl->sid_ctx_length=sid_ctx_len;
    378     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
    379 
    380     return 1;
    381     }
    382 
    383 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
    384 	{
    385 	CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
    386 	ctx->generate_session_id = cb;
    387 	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
    388 	return 1;
    389 	}
    390 
    391 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
    392 	{
    393 	CRYPTO_w_lock(CRYPTO_LOCK_SSL);
    394 	ssl->generate_session_id = cb;
    395 	CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
    396 	return 1;
    397 	}
    398 
    399 int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
    400 				unsigned int id_len)
    401 	{
    402 	/* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
    403 	 * we can "construct" a session to give us the desired check - ie. to
    404 	 * find if there's a session in the hash table that would conflict with
    405 	 * any new session built out of this id/id_len and the ssl_version in
    406 	 * use by this SSL. */
    407 	SSL_SESSION r, *p;
    408 
    409 	if(id_len > sizeof r.session_id)
    410 		return 0;
    411 
    412 	r.ssl_version = ssl->version;
    413 	r.session_id_length = id_len;
    414 	memcpy(r.session_id, id, id_len);
    415 	/* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
    416 	 * callback is calling us to check the uniqueness of a shorter ID, it
    417 	 * must be compared as a padded-out ID because that is what it will be
    418 	 * converted to when the callback has finished choosing it. */
    419 	if((r.ssl_version == SSL2_VERSION) &&
    420 			(id_len < SSL2_SSL_SESSION_ID_LENGTH))
    421 		{
    422 		memset(r.session_id + id_len, 0,
    423 			SSL2_SSL_SESSION_ID_LENGTH - id_len);
    424 		r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
    425 		}
    426 
    427 	CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
    428 	p = (SSL_SESSION *)lh_retrieve(ssl->ctx->sessions, &r);
    429 	CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
    430 	return (p != NULL);
    431 	}
    432 
    433 int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
    434 	{
    435 	return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
    436 	}
    437 
    438 int SSL_set_purpose(SSL *s, int purpose)
    439 	{
    440 	return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
    441 	}
    442 
    443 int SSL_CTX_set_trust(SSL_CTX *s, int trust)
    444 	{
    445 	return X509_VERIFY_PARAM_set_trust(s->param, trust);
    446 	}
    447 
    448 int SSL_set_trust(SSL *s, int trust)
    449 	{
    450 	return X509_VERIFY_PARAM_set_trust(s->param, trust);
    451 	}
    452 
    453 void SSL_free(SSL *s)
    454 	{
    455 	int i;
    456 
    457 	if(s == NULL)
    458 	    return;
    459 
    460 	i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
    461 #ifdef REF_PRINT
    462 	REF_PRINT("SSL",s);
    463 #endif
    464 	if (i > 0) return;
    465 #ifdef REF_CHECK
    466 	if (i < 0)
    467 		{
    468 		fprintf(stderr,"SSL_free, bad reference count\n");
    469 		abort(); /* ok */
    470 		}
    471 #endif
    472 
    473 	if (s->param)
    474 		X509_VERIFY_PARAM_free(s->param);
    475 
    476 	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
    477 
    478 	if (s->bbio != NULL)
    479 		{
    480 		/* If the buffering BIO is in place, pop it off */
    481 		if (s->bbio == s->wbio)
    482 			{
    483 			s->wbio=BIO_pop(s->wbio);
    484 			}
    485 		BIO_free(s->bbio);
    486 		s->bbio=NULL;
    487 		}
    488 	if (s->rbio != NULL)
    489 		BIO_free_all(s->rbio);
    490 	if ((s->wbio != NULL) && (s->wbio != s->rbio))
    491 		BIO_free_all(s->wbio);
    492 
    493 	if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
    494 
    495 	/* add extra stuff */
    496 	if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
    497 	if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
    498 
    499 	/* Make the next call work :-) */
    500 	if (s->session != NULL)
    501 		{
    502 		ssl_clear_bad_session(s);
    503 		SSL_SESSION_free(s->session);
    504 		}
    505 
    506 	ssl_clear_cipher_ctx(s);
    507 
    508 	if (s->cert != NULL) ssl_cert_free(s->cert);
    509 	/* Free up if allocated */
    510 
    511 #ifndef OPENSSL_NO_TLSEXT
    512 	if (s->tlsext_hostname)
    513 		OPENSSL_free(s->tlsext_hostname);
    514 	if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
    515 	if (s->tlsext_ocsp_exts)
    516 		sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
    517 						X509_EXTENSION_free);
    518 	if (s->tlsext_ocsp_ids)
    519 		sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
    520 	if (s->tlsext_ocsp_resp)
    521 		OPENSSL_free(s->tlsext_ocsp_resp);
    522 #endif
    523 	if (s->client_CA != NULL)
    524 		sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
    525 
    526 	if (s->method != NULL) s->method->ssl_free(s);
    527 
    528 	if (s->ctx) SSL_CTX_free(s->ctx);
    529 
    530 #ifndef	OPENSSL_NO_KRB5
    531 	if (s->kssl_ctx != NULL)
    532 		kssl_ctx_free(s->kssl_ctx);
    533 #endif	/* OPENSSL_NO_KRB5 */
    534 
    535 	OPENSSL_free(s);
    536 	}
    537 
    538 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
    539 	{
    540 	/* If the output buffering BIO is still in place, remove it
    541 	 */
    542 	if (s->bbio != NULL)
    543 		{
    544 		if (s->wbio == s->bbio)
    545 			{
    546 			s->wbio=s->wbio->next_bio;
    547 			s->bbio->next_bio=NULL;
    548 			}
    549 		}
    550 	if ((s->rbio != NULL) && (s->rbio != rbio))
    551 		BIO_free_all(s->rbio);
    552 	if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
    553 		BIO_free_all(s->wbio);
    554 	s->rbio=rbio;
    555 	s->wbio=wbio;
    556 	}
    557 
    558 BIO *SSL_get_rbio(const SSL *s)
    559 	{ return(s->rbio); }
    560 
    561 BIO *SSL_get_wbio(const SSL *s)
    562 	{ return(s->wbio); }
    563 
    564 int SSL_get_fd(const SSL *s)
    565 	{
    566 	return(SSL_get_rfd(s));
    567 	}
    568 
    569 int SSL_get_rfd(const SSL *s)
    570 	{
    571 	int ret= -1;
    572 	BIO *b,*r;
    573 
    574 	b=SSL_get_rbio(s);
    575 	r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
    576 	if (r != NULL)
    577 		BIO_get_fd(r,&ret);
    578 	return(ret);
    579 	}
    580 
    581 int SSL_get_wfd(const SSL *s)
    582 	{
    583 	int ret= -1;
    584 	BIO *b,*r;
    585 
    586 	b=SSL_get_wbio(s);
    587 	r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
    588 	if (r != NULL)
    589 		BIO_get_fd(r,&ret);
    590 	return(ret);
    591 	}
    592 
    593 #ifndef OPENSSL_NO_SOCK
    594 int SSL_set_fd(SSL *s,int fd)
    595 	{
    596 	int ret=0;
    597 	BIO *bio=NULL;
    598 
    599 	bio=BIO_new(BIO_s_socket());
    600 
    601 	if (bio == NULL)
    602 		{
    603 		SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
    604 		goto err;
    605 		}
    606 	BIO_set_fd(bio,fd,BIO_NOCLOSE);
    607 	SSL_set_bio(s,bio,bio);
    608 	ret=1;
    609 err:
    610 	return(ret);
    611 	}
    612 
    613 int SSL_set_wfd(SSL *s,int fd)
    614 	{
    615 	int ret=0;
    616 	BIO *bio=NULL;
    617 
    618 	if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
    619 		|| ((int)BIO_get_fd(s->rbio,NULL) != fd))
    620 		{
    621 		bio=BIO_new(BIO_s_socket());
    622 
    623 		if (bio == NULL)
    624 			{ SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
    625 		BIO_set_fd(bio,fd,BIO_NOCLOSE);
    626 		SSL_set_bio(s,SSL_get_rbio(s),bio);
    627 		}
    628 	else
    629 		SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
    630 	ret=1;
    631 err:
    632 	return(ret);
    633 	}
    634 
    635 int SSL_set_rfd(SSL *s,int fd)
    636 	{
    637 	int ret=0;
    638 	BIO *bio=NULL;
    639 
    640 	if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
    641 		|| ((int)BIO_get_fd(s->wbio,NULL) != fd))
    642 		{
    643 		bio=BIO_new(BIO_s_socket());
    644 
    645 		if (bio == NULL)
    646 			{
    647 			SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
    648 			goto err;
    649 			}
    650 		BIO_set_fd(bio,fd,BIO_NOCLOSE);
    651 		SSL_set_bio(s,bio,SSL_get_wbio(s));
    652 		}
    653 	else
    654 		SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
    655 	ret=1;
    656 err:
    657 	return(ret);
    658 	}
    659 #endif
    660 
    661 
    662 /* return length of latest Finished message we sent, copy to 'buf' */
    663 size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
    664 	{
    665 	size_t ret = 0;
    666 
    667 	if (s->s3 != NULL)
    668 		{
    669 		ret = s->s3->tmp.finish_md_len;
    670 		if (count > ret)
    671 			count = ret;
    672 		memcpy(buf, s->s3->tmp.finish_md, count);
    673 		}
    674 	return ret;
    675 	}
    676 
    677 /* return length of latest Finished message we expected, copy to 'buf' */
    678 size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
    679 	{
    680 	size_t ret = 0;
    681 
    682 	if (s->s3 != NULL)
    683 		{
    684 		ret = s->s3->tmp.peer_finish_md_len;
    685 		if (count > ret)
    686 			count = ret;
    687 		memcpy(buf, s->s3->tmp.peer_finish_md, count);
    688 		}
    689 	return ret;
    690 	}
    691 
    692 
    693 int SSL_get_verify_mode(const SSL *s)
    694 	{
    695 	return(s->verify_mode);
    696 	}
    697 
    698 int SSL_get_verify_depth(const SSL *s)
    699 	{
    700 	return X509_VERIFY_PARAM_get_depth(s->param);
    701 	}
    702 
    703 int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
    704 	{
    705 	return(s->verify_callback);
    706 	}
    707 
    708 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
    709 	{
    710 	return(ctx->verify_mode);
    711 	}
    712 
    713 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
    714 	{
    715 	return X509_VERIFY_PARAM_get_depth(ctx->param);
    716 	}
    717 
    718 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
    719 	{
    720 	return(ctx->default_verify_callback);
    721 	}
    722 
    723 void SSL_set_verify(SSL *s,int mode,
    724 		    int (*callback)(int ok,X509_STORE_CTX *ctx))
    725 	{
    726 	s->verify_mode=mode;
    727 	if (callback != NULL)
    728 		s->verify_callback=callback;
    729 	}
    730 
    731 void SSL_set_verify_depth(SSL *s,int depth)
    732 	{
    733 	X509_VERIFY_PARAM_set_depth(s->param, depth);
    734 	}
    735 
    736 void SSL_set_read_ahead(SSL *s,int yes)
    737 	{
    738 	s->read_ahead=yes;
    739 	}
    740 
    741 int SSL_get_read_ahead(const SSL *s)
    742 	{
    743 	return(s->read_ahead);
    744 	}
    745 
    746 int SSL_pending(const SSL *s)
    747 	{
    748 	/* SSL_pending cannot work properly if read-ahead is enabled
    749 	 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
    750 	 * and it is impossible to fix since SSL_pending cannot report
    751 	 * errors that may be observed while scanning the new data.
    752 	 * (Note that SSL_pending() is often used as a boolean value,
    753 	 * so we'd better not return -1.)
    754 	 */
    755 	return(s->method->ssl_pending(s));
    756 	}
    757 
    758 X509 *SSL_get_peer_certificate(const SSL *s)
    759 	{
    760 	X509 *r;
    761 
    762 	if ((s == NULL) || (s->session == NULL))
    763 		r=NULL;
    764 	else
    765 		r=s->session->peer;
    766 
    767 	if (r == NULL) return(r);
    768 
    769 	CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
    770 
    771 	return(r);
    772 	}
    773 
    774 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
    775 	{
    776 	STACK_OF(X509) *r;
    777 
    778 	if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
    779 		r=NULL;
    780 	else
    781 		r=s->session->sess_cert->cert_chain;
    782 
    783 	/* If we are a client, cert_chain includes the peer's own
    784 	 * certificate; if we are a server, it does not. */
    785 
    786 	return(r);
    787 	}
    788 
    789 /* Now in theory, since the calling process own 't' it should be safe to
    790  * modify.  We need to be able to read f without being hassled */
    791 void SSL_copy_session_id(SSL *t,const SSL *f)
    792 	{
    793 	CERT *tmp;
    794 
    795 	/* Do we need to to SSL locking? */
    796 	SSL_set_session(t,SSL_get_session(f));
    797 
    798 	/* what if we are setup as SSLv2 but want to talk SSLv3 or
    799 	 * vice-versa */
    800 	if (t->method != f->method)
    801 		{
    802 		t->method->ssl_free(t);	/* cleanup current */
    803 		t->method=f->method;	/* change method */
    804 		t->method->ssl_new(t);	/* setup new */
    805 		}
    806 
    807 	tmp=t->cert;
    808 	if (f->cert != NULL)
    809 		{
    810 		CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
    811 		t->cert=f->cert;
    812 		}
    813 	else
    814 		t->cert=NULL;
    815 	if (tmp != NULL) ssl_cert_free(tmp);
    816 	SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
    817 	}
    818 
    819 /* Fix this so it checks all the valid key/cert options */
    820 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
    821 	{
    822 	if (	(ctx == NULL) ||
    823 		(ctx->cert == NULL) ||
    824 		(ctx->cert->key->x509 == NULL))
    825 		{
    826 		SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
    827 		return(0);
    828 		}
    829 	if 	(ctx->cert->key->privatekey == NULL)
    830 		{
    831 		SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
    832 		return(0);
    833 		}
    834 	return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
    835 	}
    836 
    837 /* Fix this function so that it takes an optional type parameter */
    838 int SSL_check_private_key(const SSL *ssl)
    839 	{
    840 	if (ssl == NULL)
    841 		{
    842 		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
    843 		return(0);
    844 		}
    845 	if (ssl->cert == NULL)
    846 		{
    847                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
    848 		return 0;
    849 		}
    850 	if (ssl->cert->key->x509 == NULL)
    851 		{
    852 		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
    853 		return(0);
    854 		}
    855 	if (ssl->cert->key->privatekey == NULL)
    856 		{
    857 		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
    858 		return(0);
    859 		}
    860 	return(X509_check_private_key(ssl->cert->key->x509,
    861 		ssl->cert->key->privatekey));
    862 	}
    863 
    864 int SSL_accept(SSL *s)
    865 	{
    866 	if (s->handshake_func == 0)
    867 		/* Not properly initialized yet */
    868 		SSL_set_accept_state(s);
    869 
    870 	return(s->method->ssl_accept(s));
    871 	}
    872 
    873 int SSL_connect(SSL *s)
    874 	{
    875 	if (s->handshake_func == 0)
    876 		/* Not properly initialized yet */
    877 		SSL_set_connect_state(s);
    878 
    879 	return(s->method->ssl_connect(s));
    880 	}
    881 
    882 long SSL_get_default_timeout(const SSL *s)
    883 	{
    884 	return(s->method->get_timeout());
    885 	}
    886 
    887 int SSL_read(SSL *s,void *buf,int num)
    888 	{
    889 	if (s->handshake_func == 0)
    890 		{
    891 		SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
    892 		return -1;
    893 		}
    894 
    895 	if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
    896 		{
    897 		s->rwstate=SSL_NOTHING;
    898 		return(0);
    899 		}
    900 	return(s->method->ssl_read(s,buf,num));
    901 	}
    902 
    903 int SSL_peek(SSL *s,void *buf,int num)
    904 	{
    905 	if (s->handshake_func == 0)
    906 		{
    907 		SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
    908 		return -1;
    909 		}
    910 
    911 	if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
    912 		{
    913 		return(0);
    914 		}
    915 	return(s->method->ssl_peek(s,buf,num));
    916 	}
    917 
    918 int SSL_write(SSL *s,const void *buf,int num)
    919 	{
    920 	if (s->handshake_func == 0)
    921 		{
    922 		SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
    923 		return -1;
    924 		}
    925 
    926 	if (s->shutdown & SSL_SENT_SHUTDOWN)
    927 		{
    928 		s->rwstate=SSL_NOTHING;
    929 		SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
    930 		return(-1);
    931 		}
    932 	return(s->method->ssl_write(s,buf,num));
    933 	}
    934 
    935 int SSL_shutdown(SSL *s)
    936 	{
    937 	/* Note that this function behaves differently from what one might
    938 	 * expect.  Return values are 0 for no success (yet),
    939 	 * 1 for success; but calling it once is usually not enough,
    940 	 * even if blocking I/O is used (see ssl3_shutdown).
    941 	 */
    942 
    943 	if (s->handshake_func == 0)
    944 		{
    945 		SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
    946 		return -1;
    947 		}
    948 
    949 	if ((s != NULL) && !SSL_in_init(s))
    950 		return(s->method->ssl_shutdown(s));
    951 	else
    952 		return(1);
    953 	}
    954 
    955 int SSL_renegotiate(SSL *s)
    956 	{
    957 	if (s->new_session == 0)
    958 		{
    959 		s->new_session=1;
    960 		}
    961 	return(s->method->ssl_renegotiate(s));
    962 	}
    963 
    964 int SSL_renegotiate_pending(SSL *s)
    965 	{
    966 	/* becomes true when negotiation is requested;
    967 	 * false again once a handshake has finished */
    968 	return (s->new_session != 0);
    969 	}
    970 
    971 long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
    972 	{
    973 	long l;
    974 
    975 	switch (cmd)
    976 		{
    977 	case SSL_CTRL_GET_READ_AHEAD:
    978 		return(s->read_ahead);
    979 	case SSL_CTRL_SET_READ_AHEAD:
    980 		l=s->read_ahead;
    981 		s->read_ahead=larg;
    982 		return(l);
    983 
    984 	case SSL_CTRL_SET_MSG_CALLBACK_ARG:
    985 		s->msg_callback_arg = parg;
    986 		return 1;
    987 
    988 	case SSL_CTRL_OPTIONS:
    989 		return(s->options|=larg);
    990 	case SSL_CTRL_CLEAR_OPTIONS:
    991 		return(s->options&=~larg);
    992 	case SSL_CTRL_MODE:
    993 		return(s->mode|=larg);
    994 	case SSL_CTRL_CLEAR_MODE:
    995 		return(s->mode &=~larg);
    996 	case SSL_CTRL_GET_MAX_CERT_LIST:
    997 		return(s->max_cert_list);
    998 	case SSL_CTRL_SET_MAX_CERT_LIST:
    999 		l=s->max_cert_list;
   1000 		s->max_cert_list=larg;
   1001 		return(l);
   1002 	case SSL_CTRL_SET_MTU:
   1003 		if (SSL_version(s) == DTLS1_VERSION ||
   1004 		    SSL_version(s) == DTLS1_BAD_VER)
   1005 			{
   1006 			s->d1->mtu = larg;
   1007 			return larg;
   1008 			}
   1009 		return 0;
   1010 	case SSL_CTRL_GET_RI_SUPPORT:
   1011 		if (s->s3)
   1012 			return s->s3->send_connection_binding;
   1013 		else return 0;
   1014 	default:
   1015 		return(s->method->ssl_ctrl(s,cmd,larg,parg));
   1016 		}
   1017 	}
   1018 
   1019 long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
   1020 	{
   1021 	switch(cmd)
   1022 		{
   1023 	case SSL_CTRL_SET_MSG_CALLBACK:
   1024 		s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
   1025 		return 1;
   1026 
   1027 	default:
   1028 		return(s->method->ssl_callback_ctrl(s,cmd,fp));
   1029 		}
   1030 	}
   1031 
   1032 struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx)
   1033 	{
   1034 	return ctx->sessions;
   1035 	}
   1036 
   1037 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
   1038 	{
   1039 	long l;
   1040 
   1041 	switch (cmd)
   1042 		{
   1043 	case SSL_CTRL_GET_READ_AHEAD:
   1044 		return(ctx->read_ahead);
   1045 	case SSL_CTRL_SET_READ_AHEAD:
   1046 		l=ctx->read_ahead;
   1047 		ctx->read_ahead=larg;
   1048 		return(l);
   1049 
   1050 	case SSL_CTRL_SET_MSG_CALLBACK_ARG:
   1051 		ctx->msg_callback_arg = parg;
   1052 		return 1;
   1053 
   1054 	case SSL_CTRL_GET_MAX_CERT_LIST:
   1055 		return(ctx->max_cert_list);
   1056 	case SSL_CTRL_SET_MAX_CERT_LIST:
   1057 		l=ctx->max_cert_list;
   1058 		ctx->max_cert_list=larg;
   1059 		return(l);
   1060 
   1061 	case SSL_CTRL_SET_SESS_CACHE_SIZE:
   1062 		l=ctx->session_cache_size;
   1063 		ctx->session_cache_size=larg;
   1064 		return(l);
   1065 	case SSL_CTRL_GET_SESS_CACHE_SIZE:
   1066 		return(ctx->session_cache_size);
   1067 	case SSL_CTRL_SET_SESS_CACHE_MODE:
   1068 		l=ctx->session_cache_mode;
   1069 		ctx->session_cache_mode=larg;
   1070 		return(l);
   1071 	case SSL_CTRL_GET_SESS_CACHE_MODE:
   1072 		return(ctx->session_cache_mode);
   1073 
   1074 	case SSL_CTRL_SESS_NUMBER:
   1075 		return(ctx->sessions->num_items);
   1076 	case SSL_CTRL_SESS_CONNECT:
   1077 		return(ctx->stats.sess_connect);
   1078 	case SSL_CTRL_SESS_CONNECT_GOOD:
   1079 		return(ctx->stats.sess_connect_good);
   1080 	case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
   1081 		return(ctx->stats.sess_connect_renegotiate);
   1082 	case SSL_CTRL_SESS_ACCEPT:
   1083 		return(ctx->stats.sess_accept);
   1084 	case SSL_CTRL_SESS_ACCEPT_GOOD:
   1085 		return(ctx->stats.sess_accept_good);
   1086 	case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
   1087 		return(ctx->stats.sess_accept_renegotiate);
   1088 	case SSL_CTRL_SESS_HIT:
   1089 		return(ctx->stats.sess_hit);
   1090 	case SSL_CTRL_SESS_CB_HIT:
   1091 		return(ctx->stats.sess_cb_hit);
   1092 	case SSL_CTRL_SESS_MISSES:
   1093 		return(ctx->stats.sess_miss);
   1094 	case SSL_CTRL_SESS_TIMEOUTS:
   1095 		return(ctx->stats.sess_timeout);
   1096 	case SSL_CTRL_SESS_CACHE_FULL:
   1097 		return(ctx->stats.sess_cache_full);
   1098 	case SSL_CTRL_OPTIONS:
   1099 		return(ctx->options|=larg);
   1100 	case SSL_CTRL_CLEAR_OPTIONS:
   1101 		return(ctx->options&=~larg);
   1102 	case SSL_CTRL_MODE:
   1103 		return(ctx->mode|=larg);
   1104 	case SSL_CTRL_CLEAR_MODE:
   1105 		return(ctx->mode&=~larg);
   1106 	default:
   1107 		return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
   1108 		}
   1109 	}
   1110 
   1111 long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
   1112 	{
   1113 	switch(cmd)
   1114 		{
   1115 	case SSL_CTRL_SET_MSG_CALLBACK:
   1116 		ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
   1117 		return 1;
   1118 
   1119 	default:
   1120 		return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));
   1121 		}
   1122 	}
   1123 
   1124 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
   1125 	{
   1126 	long l;
   1127 
   1128 	l=a->id-b->id;
   1129 	if (l == 0L)
   1130 		return(0);
   1131 	else
   1132 		return((l > 0)?1:-1);
   1133 	}
   1134 
   1135 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
   1136 			const SSL_CIPHER * const *bp)
   1137 	{
   1138 	long l;
   1139 
   1140 	l=(*ap)->id-(*bp)->id;
   1141 	if (l == 0L)
   1142 		return(0);
   1143 	else
   1144 		return((l > 0)?1:-1);
   1145 	}
   1146 
   1147 /** return a STACK of the ciphers available for the SSL and in order of
   1148  * preference */
   1149 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
   1150 	{
   1151 	if (s != NULL)
   1152 		{
   1153 		if (s->cipher_list != NULL)
   1154 			{
   1155 			return(s->cipher_list);
   1156 			}
   1157 		else if ((s->ctx != NULL) &&
   1158 			(s->ctx->cipher_list != NULL))
   1159 			{
   1160 			return(s->ctx->cipher_list);
   1161 			}
   1162 		}
   1163 	return(NULL);
   1164 	}
   1165 
   1166 /** return a STACK of the ciphers available for the SSL and in order of
   1167  * algorithm id */
   1168 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
   1169 	{
   1170 	if (s != NULL)
   1171 		{
   1172 		if (s->cipher_list_by_id != NULL)
   1173 			{
   1174 			return(s->cipher_list_by_id);
   1175 			}
   1176 		else if ((s->ctx != NULL) &&
   1177 			(s->ctx->cipher_list_by_id != NULL))
   1178 			{
   1179 			return(s->ctx->cipher_list_by_id);
   1180 			}
   1181 		}
   1182 	return(NULL);
   1183 	}
   1184 
   1185 /** The old interface to get the same thing as SSL_get_ciphers() */
   1186 const char *SSL_get_cipher_list(const SSL *s,int n)
   1187 	{
   1188 	SSL_CIPHER *c;
   1189 	STACK_OF(SSL_CIPHER) *sk;
   1190 
   1191 	if (s == NULL) return(NULL);
   1192 	sk=SSL_get_ciphers(s);
   1193 	if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
   1194 		return(NULL);
   1195 	c=sk_SSL_CIPHER_value(sk,n);
   1196 	if (c == NULL) return(NULL);
   1197 	return(c->name);
   1198 	}
   1199 
   1200 /** specify the ciphers to be used by default by the SSL_CTX */
   1201 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
   1202 	{
   1203 	STACK_OF(SSL_CIPHER) *sk;
   1204 
   1205 	sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
   1206 		&ctx->cipher_list_by_id,str);
   1207 	/* ssl_create_cipher_list may return an empty stack if it
   1208 	 * was unable to find a cipher matching the given rule string
   1209 	 * (for example if the rule string specifies a cipher which
   1210 	 * has been disabled). This is not an error as far as
   1211 	 * ssl_create_cipher_list is concerned, and hence
   1212 	 * ctx->cipher_list and ctx->cipher_list_by_id has been
   1213 	 * updated. */
   1214 	if (sk == NULL)
   1215 		return 0;
   1216 	else if (sk_SSL_CIPHER_num(sk) == 0)
   1217 		{
   1218 		SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
   1219 		return 0;
   1220 		}
   1221 	return 1;
   1222 	}
   1223 
   1224 /** specify the ciphers to be used by the SSL */
   1225 int SSL_set_cipher_list(SSL *s,const char *str)
   1226 	{
   1227 	STACK_OF(SSL_CIPHER) *sk;
   1228 
   1229 	sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
   1230 		&s->cipher_list_by_id,str);
   1231 	/* see comment in SSL_CTX_set_cipher_list */
   1232 	if (sk == NULL)
   1233 		return 0;
   1234 	else if (sk_SSL_CIPHER_num(sk) == 0)
   1235 		{
   1236 		SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
   1237 		return 0;
   1238 		}
   1239 	return 1;
   1240 	}
   1241 
   1242 /* works well for SSLv2, not so good for SSLv3 */
   1243 char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
   1244 	{
   1245 	char *p;
   1246 	STACK_OF(SSL_CIPHER) *sk;
   1247 	SSL_CIPHER *c;
   1248 	int i;
   1249 
   1250 	if ((s->session == NULL) || (s->session->ciphers == NULL) ||
   1251 		(len < 2))
   1252 		return(NULL);
   1253 
   1254 	p=buf;
   1255 	sk=s->session->ciphers;
   1256 	for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
   1257 		{
   1258 		int n;
   1259 
   1260 		c=sk_SSL_CIPHER_value(sk,i);
   1261 		n=strlen(c->name);
   1262 		if (n+1 > len)
   1263 			{
   1264 			if (p != buf)
   1265 				--p;
   1266 			*p='\0';
   1267 			return buf;
   1268 			}
   1269 		strcpy(p,c->name);
   1270 		p+=n;
   1271 		*(p++)=':';
   1272 		len-=n+1;
   1273 		}
   1274 	p[-1]='\0';
   1275 	return(buf);
   1276 	}
   1277 
   1278 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
   1279                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))
   1280 	{
   1281 	int i,j=0;
   1282 	SSL_CIPHER *c;
   1283 	unsigned char *q;
   1284 #ifndef OPENSSL_NO_KRB5
   1285         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
   1286 #endif /* OPENSSL_NO_KRB5 */
   1287 
   1288 	if (sk == NULL) return(0);
   1289 	q=p;
   1290 
   1291 	for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
   1292 		{
   1293 		c=sk_SSL_CIPHER_value(sk,i);
   1294 #ifndef OPENSSL_NO_KRB5
   1295                 if ((c->algorithms & SSL_KRB5) && nokrb5)
   1296                     continue;
   1297 #endif /* OPENSSL_NO_KRB5 */
   1298 
   1299 		j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
   1300 		p+=j;
   1301 		}
   1302 	/* If p == q, no ciphers and caller indicates an error. Otherwise
   1303 	 * add SCSV if not renegotiating.
   1304 	 */
   1305 	if (p != q && !s->new_session)
   1306 		{
   1307 		static SSL_CIPHER scsv =
   1308 			{
   1309 			0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0,
   1310 			};
   1311 		j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
   1312 		p+=j;
   1313 #ifdef OPENSSL_RI_DEBUG
   1314 		fprintf(stderr, "SCSV sent by client\n");
   1315 #endif
   1316 		}
   1317 
   1318 	return(p-q);
   1319 	}
   1320 
   1321 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
   1322 					       STACK_OF(SSL_CIPHER) **skp)
   1323 	{
   1324 	SSL_CIPHER *c;
   1325 	STACK_OF(SSL_CIPHER) *sk;
   1326 	int i,n;
   1327 	if (s->s3)
   1328 		s->s3->send_connection_binding = 0;
   1329 
   1330 	n=ssl_put_cipher_by_char(s,NULL,NULL);
   1331 	if ((num%n) != 0)
   1332 		{
   1333 		SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
   1334 		return(NULL);
   1335 		}
   1336 	if ((skp == NULL) || (*skp == NULL))
   1337 		sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
   1338 	else
   1339 		{
   1340 		sk= *skp;
   1341 		sk_SSL_CIPHER_zero(sk);
   1342 		}
   1343 
   1344 	for (i=0; i<num; i+=n)
   1345 		{
   1346 		/* Check for SCSV */
   1347 		if (s->s3 && (n != 3 || !p[0]) &&
   1348 			(p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
   1349 			(p[n-1] == (SSL3_CK_SCSV & 0xff)))
   1350 			{
   1351 			/* SCSV fatal if renegotiating */
   1352 			if (s->new_session)
   1353 				{
   1354 				SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
   1355 				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
   1356 				goto err;
   1357 				}
   1358 			s->s3->send_connection_binding = 1;
   1359 			p += n;
   1360 #ifdef OPENSSL_RI_DEBUG
   1361 			fprintf(stderr, "SCSV received by server\n");
   1362 #endif
   1363 			continue;
   1364 			}
   1365 
   1366 		c=ssl_get_cipher_by_char(s,p);
   1367 		p+=n;
   1368 		if (c != NULL)
   1369 			{
   1370 			if (!sk_SSL_CIPHER_push(sk,c))
   1371 				{
   1372 				SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
   1373 				goto err;
   1374 				}
   1375 			}
   1376 		}
   1377 
   1378 	if (skp != NULL)
   1379 		*skp=sk;
   1380 	return(sk);
   1381 err:
   1382 	if ((skp == NULL) || (*skp == NULL))
   1383 		sk_SSL_CIPHER_free(sk);
   1384 	return(NULL);
   1385 	}
   1386 
   1387 #ifndef OPENSSL_NO_TLSEXT
   1388 /** return a servername extension value if provided in Client Hello, or NULL.
   1389  * So far, only host_name types are defined (RFC 3546).
   1390  */
   1391 
   1392 const char *SSL_get_servername(const SSL *s, const int type)
   1393 	{
   1394 	if (type != TLSEXT_NAMETYPE_host_name)
   1395 		return NULL;
   1396 
   1397 	return s->session && !s->tlsext_hostname ?
   1398 		s->session->tlsext_hostname :
   1399 		s->tlsext_hostname;
   1400 	}
   1401 
   1402 int SSL_get_servername_type(const SSL *s)
   1403 	{
   1404 	if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
   1405 		return TLSEXT_NAMETYPE_host_name;
   1406 	return -1;
   1407 	}
   1408 #endif
   1409 
   1410 unsigned long SSL_SESSION_hash(const SSL_SESSION *a)
   1411 	{
   1412 	unsigned long l;
   1413 
   1414 	l=(unsigned long)
   1415 		((unsigned int) a->session_id[0]     )|
   1416 		((unsigned int) a->session_id[1]<< 8L)|
   1417 		((unsigned long)a->session_id[2]<<16L)|
   1418 		((unsigned long)a->session_id[3]<<24L);
   1419 	return(l);
   1420 	}
   1421 
   1422 /* NB: If this function (or indeed the hash function which uses a sort of
   1423  * coarser function than this one) is changed, ensure
   1424  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
   1425  * able to construct an SSL_SESSION that will collide with any existing session
   1426  * with a matching session ID. */
   1427 int SSL_SESSION_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
   1428 	{
   1429 	if (a->ssl_version != b->ssl_version)
   1430 		return(1);
   1431 	if (a->session_id_length != b->session_id_length)
   1432 		return(1);
   1433 	return(memcmp(a->session_id,b->session_id,a->session_id_length));
   1434 	}
   1435 
   1436 /* These wrapper functions should remain rather than redeclaring
   1437  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
   1438  * variable. The reason is that the functions aren't static, they're exposed via
   1439  * ssl.h. */
   1440 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)
   1441 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)
   1442 
   1443 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
   1444 	{
   1445 	SSL_CTX *ret=NULL;
   1446 
   1447 	if (meth == NULL)
   1448 		{
   1449 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
   1450 		return(NULL);
   1451 		}
   1452 
   1453 #ifdef OPENSSL_FIPS
   1454 	if (FIPS_mode() && (meth->version < TLS1_VERSION))
   1455 		{
   1456 		SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
   1457 		return NULL;
   1458 		}
   1459 #endif
   1460 
   1461 	if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
   1462 		{
   1463 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
   1464 		goto err;
   1465 		}
   1466 	ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
   1467 	if (ret == NULL)
   1468 		goto err;
   1469 
   1470 	memset(ret,0,sizeof(SSL_CTX));
   1471 
   1472 	ret->method=meth;
   1473 
   1474 	ret->cert_store=NULL;
   1475 	ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
   1476 	ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
   1477 	ret->session_cache_head=NULL;
   1478 	ret->session_cache_tail=NULL;
   1479 
   1480 	/* We take the system default */
   1481 	ret->session_timeout=meth->get_timeout();
   1482 
   1483 	ret->new_session_cb=0;
   1484 	ret->remove_session_cb=0;
   1485 	ret->get_session_cb=0;
   1486 	ret->generate_session_id=0;
   1487 
   1488 	memset((char *)&ret->stats,0,sizeof(ret->stats));
   1489 
   1490 	ret->references=1;
   1491 	ret->quiet_shutdown=0;
   1492 
   1493 /*	ret->cipher=NULL;*/
   1494 /*	ret->s2->challenge=NULL;
   1495 	ret->master_key=NULL;
   1496 	ret->key_arg=NULL;
   1497 	ret->s2->conn_id=NULL; */
   1498 
   1499 	ret->info_callback=NULL;
   1500 
   1501 	ret->app_verify_callback=0;
   1502 	ret->app_verify_arg=NULL;
   1503 
   1504 	ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
   1505 	ret->read_ahead=0;
   1506 	ret->msg_callback=0;
   1507 	ret->msg_callback_arg=NULL;
   1508 	ret->verify_mode=SSL_VERIFY_NONE;
   1509 #if 0
   1510 	ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
   1511 #endif
   1512 	ret->sid_ctx_length=0;
   1513 	ret->default_verify_callback=NULL;
   1514 	if ((ret->cert=ssl_cert_new()) == NULL)
   1515 		goto err;
   1516 
   1517 	ret->default_passwd_callback=0;
   1518 	ret->default_passwd_callback_userdata=NULL;
   1519 	ret->client_cert_cb=0;
   1520 	ret->app_gen_cookie_cb=0;
   1521 	ret->app_verify_cookie_cb=0;
   1522 
   1523 	ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),
   1524 			LHASH_COMP_FN(SSL_SESSION_cmp));
   1525 	if (ret->sessions == NULL) goto err;
   1526 	ret->cert_store=X509_STORE_new();
   1527 	if (ret->cert_store == NULL) goto err;
   1528 
   1529 	ssl_create_cipher_list(ret->method,
   1530 		&ret->cipher_list,&ret->cipher_list_by_id,
   1531 		SSL_DEFAULT_CIPHER_LIST);
   1532 	if (ret->cipher_list == NULL
   1533 	    || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
   1534 		{
   1535 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
   1536 		goto err2;
   1537 		}
   1538 
   1539 	ret->param = X509_VERIFY_PARAM_new();
   1540 	if (!ret->param)
   1541 		goto err;
   1542 
   1543 	if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
   1544 		{
   1545 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
   1546 		goto err2;
   1547 		}
   1548 	if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
   1549 		{
   1550 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
   1551 		goto err2;
   1552 		}
   1553 	if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
   1554 		{
   1555 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
   1556 		goto err2;
   1557 		}
   1558 
   1559 	if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
   1560 		goto err;
   1561 
   1562 	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
   1563 
   1564 	ret->extra_certs=NULL;
   1565 	ret->comp_methods=SSL_COMP_get_compression_methods();
   1566 
   1567 #ifndef OPENSSL_NO_TLSEXT
   1568 	ret->tlsext_servername_callback = 0;
   1569 	ret->tlsext_servername_arg = NULL;
   1570 	/* Setup RFC4507 ticket keys */
   1571 	if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
   1572 		|| (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
   1573 		|| (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
   1574 		ret->options |= SSL_OP_NO_TICKET;
   1575 
   1576 	ret->tlsext_status_cb = 0;
   1577 	ret->tlsext_status_arg = NULL;
   1578 
   1579 #endif
   1580 
   1581 #ifndef OPENSSL_NO_ENGINE
   1582 	ret->client_cert_engine = NULL;
   1583 #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
   1584 #define eng_strx(x)	#x
   1585 #define eng_str(x)	eng_strx(x)
   1586 	/* Use specific client engine automatically... ignore errors */
   1587 	{
   1588 	ENGINE *eng;
   1589 	eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
   1590 	if (!eng)
   1591 		{
   1592 		ERR_clear_error();
   1593 		ENGINE_load_builtin_engines();
   1594 		eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
   1595 		}
   1596 	if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
   1597 		ERR_clear_error();
   1598 	}
   1599 #endif
   1600 #endif
   1601 	/* Default is to connect to non-RI servers. When RI is more widely
   1602 	 * deployed might change this.
   1603 	 */
   1604 	ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
   1605 
   1606 	return(ret);
   1607 err:
   1608 	SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
   1609 err2:
   1610 	if (ret != NULL) SSL_CTX_free(ret);
   1611 	return(NULL);
   1612 	}
   1613 
   1614 #if 0
   1615 static void SSL_COMP_free(SSL_COMP *comp)
   1616     { OPENSSL_free(comp); }
   1617 #endif
   1618 
   1619 void SSL_CTX_free(SSL_CTX *a)
   1620 	{
   1621 	int i;
   1622 
   1623 	if (a == NULL) return;
   1624 
   1625 	i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
   1626 #ifdef REF_PRINT
   1627 	REF_PRINT("SSL_CTX",a);
   1628 #endif
   1629 	if (i > 0) return;
   1630 #ifdef REF_CHECK
   1631 	if (i < 0)
   1632 		{
   1633 		fprintf(stderr,"SSL_CTX_free, bad reference count\n");
   1634 		abort(); /* ok */
   1635 		}
   1636 #endif
   1637 
   1638 	if (a->param)
   1639 		X509_VERIFY_PARAM_free(a->param);
   1640 
   1641 	/*
   1642 	 * Free internal session cache. However: the remove_cb() may reference
   1643 	 * the ex_data of SSL_CTX, thus the ex_data store can only be removed
   1644 	 * after the sessions were flushed.
   1645 	 * As the ex_data handling routines might also touch the session cache,
   1646 	 * the most secure solution seems to be: empty (flush) the cache, then
   1647 	 * free ex_data, then finally free the cache.
   1648 	 * (See ticket [openssl.org #212].)
   1649 	 */
   1650 	if (a->sessions != NULL)
   1651 		SSL_CTX_flush_sessions(a,0);
   1652 
   1653 	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
   1654 
   1655 	if (a->sessions != NULL)
   1656 		lh_free(a->sessions);
   1657 
   1658 	if (a->cert_store != NULL)
   1659 		X509_STORE_free(a->cert_store);
   1660 	if (a->cipher_list != NULL)
   1661 		sk_SSL_CIPHER_free(a->cipher_list);
   1662 	if (a->cipher_list_by_id != NULL)
   1663 		sk_SSL_CIPHER_free(a->cipher_list_by_id);
   1664 	if (a->cert != NULL)
   1665 		ssl_cert_free(a->cert);
   1666 	if (a->client_CA != NULL)
   1667 		sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
   1668 	if (a->extra_certs != NULL)
   1669 		sk_X509_pop_free(a->extra_certs,X509_free);
   1670 #if 0 /* This should never be done, since it removes a global database */
   1671 	if (a->comp_methods != NULL)
   1672 		sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
   1673 #else
   1674 	a->comp_methods = NULL;
   1675 #endif
   1676 #ifndef OPENSSL_NO_ENGINE
   1677 	if (a->client_cert_engine)
   1678 		ENGINE_finish(a->client_cert_engine);
   1679 #endif
   1680 	OPENSSL_free(a);
   1681 	}
   1682 
   1683 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
   1684 	{
   1685 	ctx->default_passwd_callback=cb;
   1686 	}
   1687 
   1688 void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
   1689 	{
   1690 	ctx->default_passwd_callback_userdata=u;
   1691 	}
   1692 
   1693 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
   1694 	{
   1695 	ctx->app_verify_callback=cb;
   1696 	ctx->app_verify_arg=arg;
   1697 	}
   1698 
   1699 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
   1700 	{
   1701 	ctx->verify_mode=mode;
   1702 	ctx->default_verify_callback=cb;
   1703 	}
   1704 
   1705 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
   1706 	{
   1707 	X509_VERIFY_PARAM_set_depth(ctx->param, depth);
   1708 	}
   1709 
   1710 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
   1711 	{
   1712 	CERT_PKEY *cpk;
   1713 	int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
   1714 	int rsa_enc_export,dh_rsa_export,dh_dsa_export;
   1715 	int rsa_tmp_export,dh_tmp_export,kl;
   1716 	unsigned long mask,emask;
   1717 	int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
   1718 #ifndef OPENSSL_NO_ECDH
   1719 	int have_ecdh_tmp;
   1720 #endif
   1721 	X509 *x = NULL;
   1722 	EVP_PKEY *ecc_pkey = NULL;
   1723 	int signature_nid = 0;
   1724 
   1725 	if (c == NULL) return;
   1726 
   1727 	kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
   1728 
   1729 #ifndef OPENSSL_NO_RSA
   1730 	rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
   1731 	rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
   1732 		(rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
   1733 #else
   1734 	rsa_tmp=rsa_tmp_export=0;
   1735 #endif
   1736 #ifndef OPENSSL_NO_DH
   1737 	dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
   1738 	dh_tmp_export=(c->dh_tmp_cb != NULL ||
   1739 		(dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
   1740 #else
   1741 	dh_tmp=dh_tmp_export=0;
   1742 #endif
   1743 
   1744 #ifndef OPENSSL_NO_ECDH
   1745 	have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
   1746 #endif
   1747 	cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
   1748 	rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
   1749 	rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
   1750 	cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
   1751 	rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
   1752 	cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
   1753 	dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
   1754 	cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
   1755 	dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
   1756 	dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
   1757 	cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
   1758 /* FIX THIS EAY EAY EAY */
   1759 	dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
   1760 	dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
   1761 	cpk= &(c->pkeys[SSL_PKEY_ECC]);
   1762 	have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
   1763 	mask=0;
   1764 	emask=0;
   1765 
   1766 #ifdef CIPHER_DEBUG
   1767 	printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
   1768 		rsa_tmp,rsa_tmp_export,dh_tmp,
   1769 		rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
   1770 #endif
   1771 
   1772 	if (rsa_enc || (rsa_tmp && rsa_sign))
   1773 		mask|=SSL_kRSA;
   1774 	if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
   1775 		emask|=SSL_kRSA;
   1776 
   1777 #if 0
   1778 	/* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
   1779 	if (	(dh_tmp || dh_rsa || dh_dsa) &&
   1780 		(rsa_enc || rsa_sign || dsa_sign))
   1781 		mask|=SSL_kEDH;
   1782 	if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
   1783 		(rsa_enc || rsa_sign || dsa_sign))
   1784 		emask|=SSL_kEDH;
   1785 #endif
   1786 
   1787 	if (dh_tmp_export)
   1788 		emask|=SSL_kEDH;
   1789 
   1790 	if (dh_tmp)
   1791 		mask|=SSL_kEDH;
   1792 
   1793 	if (dh_rsa) mask|=SSL_kDHr;
   1794 	if (dh_rsa_export) emask|=SSL_kDHr;
   1795 
   1796 	if (dh_dsa) mask|=SSL_kDHd;
   1797 	if (dh_dsa_export) emask|=SSL_kDHd;
   1798 
   1799 	if (rsa_enc || rsa_sign)
   1800 		{
   1801 		mask|=SSL_aRSA;
   1802 		emask|=SSL_aRSA;
   1803 		}
   1804 
   1805 	if (dsa_sign)
   1806 		{
   1807 		mask|=SSL_aDSS;
   1808 		emask|=SSL_aDSS;
   1809 		}
   1810 
   1811 	mask|=SSL_aNULL;
   1812 	emask|=SSL_aNULL;
   1813 
   1814 #ifndef OPENSSL_NO_KRB5
   1815 	mask|=SSL_kKRB5|SSL_aKRB5;
   1816 	emask|=SSL_kKRB5|SSL_aKRB5;
   1817 #endif
   1818 
   1819 	/* An ECC certificate may be usable for ECDH and/or
   1820 	 * ECDSA cipher suites depending on the key usage extension.
   1821 	 */
   1822 	if (have_ecc_cert)
   1823 		{
   1824                 /* This call populates extension flags (ex_flags) */
   1825 		x = (c->pkeys[SSL_PKEY_ECC]).x509;
   1826 		X509_check_purpose(x, -1, 0);
   1827 		ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
   1828 		    (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
   1829 		ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
   1830 		    (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
   1831 		ecc_pkey = X509_get_pubkey(x);
   1832 		ecc_pkey_size = (ecc_pkey != NULL) ?
   1833 		    EVP_PKEY_bits(ecc_pkey) : 0;
   1834 		EVP_PKEY_free(ecc_pkey);
   1835 		if ((x->sig_alg) && (x->sig_alg->algorithm))
   1836 			signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
   1837 #ifndef OPENSSL_NO_ECDH
   1838 		if (ecdh_ok)
   1839 			{
   1840 			if ((signature_nid == NID_md5WithRSAEncryption) ||
   1841 			    (signature_nid == NID_md4WithRSAEncryption) ||
   1842 			    (signature_nid == NID_md2WithRSAEncryption))
   1843 				{
   1844 				mask|=SSL_kECDH|SSL_aRSA;
   1845 				if (ecc_pkey_size <= 163)
   1846 					emask|=SSL_kECDH|SSL_aRSA;
   1847 				}
   1848 			if (signature_nid == NID_ecdsa_with_SHA1)
   1849 				{
   1850 				mask|=SSL_kECDH|SSL_aECDSA;
   1851 				if (ecc_pkey_size <= 163)
   1852 					emask|=SSL_kECDH|SSL_aECDSA;
   1853 				}
   1854 			}
   1855 #endif
   1856 #ifndef OPENSSL_NO_ECDSA
   1857 		if (ecdsa_ok)
   1858 			{
   1859 			mask|=SSL_aECDSA;
   1860 			emask|=SSL_aECDSA;
   1861 			}
   1862 #endif
   1863 		}
   1864 
   1865 #ifndef OPENSSL_NO_ECDH
   1866 	if (have_ecdh_tmp)
   1867 		{
   1868 		mask|=SSL_kECDHE;
   1869 		emask|=SSL_kECDHE;
   1870 		}
   1871 #endif
   1872 	c->mask=mask;
   1873 	c->export_mask=emask;
   1874 	c->valid=1;
   1875 	}
   1876 
   1877 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
   1878 #define ku_reject(x, usage) \
   1879 	(((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
   1880 
   1881 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs)
   1882 	{
   1883 	unsigned long alg = cs->algorithms;
   1884 	EVP_PKEY *pkey = NULL;
   1885 	int keysize = 0;
   1886 	int signature_nid = 0;
   1887 
   1888 	if (SSL_C_IS_EXPORT(cs))
   1889 		{
   1890 		/* ECDH key length in export ciphers must be <= 163 bits */
   1891 		pkey = X509_get_pubkey(x);
   1892 		if (pkey == NULL) return 0;
   1893 		keysize = EVP_PKEY_bits(pkey);
   1894 		EVP_PKEY_free(pkey);
   1895 		if (keysize > 163) return 0;
   1896 		}
   1897 
   1898 	/* This call populates the ex_flags field correctly */
   1899 	X509_check_purpose(x, -1, 0);
   1900 	if ((x->sig_alg) && (x->sig_alg->algorithm))
   1901 		signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
   1902 	if (alg & SSL_kECDH)
   1903 		{
   1904 		/* key usage, if present, must allow key agreement */
   1905 		if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
   1906 			{
   1907 			return 0;
   1908 			}
   1909 		if (alg & SSL_aECDSA)
   1910 			{
   1911 			/* signature alg must be ECDSA */
   1912 			if (signature_nid != NID_ecdsa_with_SHA1)
   1913 				{
   1914 				return 0;
   1915 				}
   1916 			}
   1917 		if (alg & SSL_aRSA)
   1918 			{
   1919 			/* signature alg must be RSA */
   1920 			if ((signature_nid != NID_md5WithRSAEncryption) &&
   1921 			    (signature_nid != NID_md4WithRSAEncryption) &&
   1922 			    (signature_nid != NID_md2WithRSAEncryption))
   1923 				{
   1924 				return 0;
   1925 				}
   1926 			}
   1927 		}
   1928 	else if (alg & SSL_aECDSA)
   1929 		{
   1930 		/* key usage, if present, must allow signing */
   1931 		if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
   1932 			{
   1933 			return 0;
   1934 			}
   1935 		}
   1936 
   1937 	return 1;  /* all checks are ok */
   1938 	}
   1939 
   1940 /* THIS NEEDS CLEANING UP */
   1941 X509 *ssl_get_server_send_cert(SSL *s)
   1942 	{
   1943 	unsigned long alg,mask,kalg;
   1944 	CERT *c;
   1945 	int i,is_export;
   1946 
   1947 	c=s->cert;
   1948 	ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
   1949 	alg=s->s3->tmp.new_cipher->algorithms;
   1950 	is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
   1951 	mask=is_export?c->export_mask:c->mask;
   1952 	kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
   1953 
   1954 	if (kalg & SSL_kECDH)
   1955 		{
   1956 		/* we don't need to look at SSL_kECDHE
   1957 		 * since no certificate is needed for
   1958 		 * anon ECDH and for authenticated
   1959 		 * ECDHE, the check for the auth
   1960 		 * algorithm will set i correctly
   1961 		 * NOTE: For ECDH-RSA, we need an ECC
   1962 		 * not an RSA cert but for ECDHE-RSA
   1963 		 * we need an RSA cert. Placing the
   1964 		 * checks for SSL_kECDH before RSA
   1965 		 * checks ensures the correct cert is chosen.
   1966 		 */
   1967 		i=SSL_PKEY_ECC;
   1968 		}
   1969 	else if (kalg & SSL_aECDSA)
   1970 		{
   1971 		i=SSL_PKEY_ECC;
   1972 		}
   1973 	else if (kalg & SSL_kDHr)
   1974 		i=SSL_PKEY_DH_RSA;
   1975 	else if (kalg & SSL_kDHd)
   1976 		i=SSL_PKEY_DH_DSA;
   1977 	else if (kalg & SSL_aDSS)
   1978 		i=SSL_PKEY_DSA_SIGN;
   1979 	else if (kalg & SSL_aRSA)
   1980 		{
   1981 		if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
   1982 			i=SSL_PKEY_RSA_SIGN;
   1983 		else
   1984 			i=SSL_PKEY_RSA_ENC;
   1985 		}
   1986 	else if (kalg & SSL_aKRB5)
   1987 		{
   1988 		/* VRS something else here? */
   1989 		return(NULL);
   1990 		}
   1991 	else /* if (kalg & SSL_aNULL) */
   1992 		{
   1993 		SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
   1994 		return(NULL);
   1995 		}
   1996 	if (c->pkeys[i].x509 == NULL) return(NULL);
   1997 
   1998 	return(c->pkeys[i].x509);
   1999 	}
   2000 
   2001 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
   2002 	{
   2003 	unsigned long alg;
   2004 	CERT *c;
   2005 
   2006 	alg=cipher->algorithms;
   2007 	c=s->cert;
   2008 
   2009 	if ((alg & SSL_aDSS) &&
   2010 		(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
   2011 		return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
   2012 	else if (alg & SSL_aRSA)
   2013 		{
   2014 		if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
   2015 			return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
   2016 		else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
   2017 			return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
   2018 		else
   2019 			return(NULL);
   2020 		}
   2021 	else if ((alg & SSL_aECDSA) &&
   2022 	         (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
   2023 		return(c->pkeys[SSL_PKEY_ECC].privatekey);
   2024 	else /* if (alg & SSL_aNULL) */
   2025 		{
   2026 		SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);
   2027 		return(NULL);
   2028 		}
   2029 	}
   2030 
   2031 void ssl_update_cache(SSL *s,int mode)
   2032 	{
   2033 	int i;
   2034 
   2035 	/* If the session_id_length is 0, we are not supposed to cache it,
   2036 	 * and it would be rather hard to do anyway :-) */
   2037 	if (s->session->session_id_length == 0) return;
   2038 
   2039 	i=s->ctx->session_cache_mode;
   2040 	if ((i & mode) && (!s->hit)
   2041 		&& ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
   2042 		    || SSL_CTX_add_session(s->ctx,s->session))
   2043 		&& (s->ctx->new_session_cb != NULL))
   2044 		{
   2045 		CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
   2046 		if (!s->ctx->new_session_cb(s,s->session))
   2047 			SSL_SESSION_free(s->session);
   2048 		}
   2049 
   2050 	/* auto flush every 255 connections */
   2051 	if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
   2052 		((i & mode) == mode))
   2053 		{
   2054 		if (  (((mode & SSL_SESS_CACHE_CLIENT)
   2055 			?s->ctx->stats.sess_connect_good
   2056 			:s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
   2057 			{
   2058 			SSL_CTX_flush_sessions(s->ctx,(unsigned long)time(NULL));
   2059 			}
   2060 		}
   2061 	}
   2062 
   2063 SSL_METHOD *SSL_get_ssl_method(SSL *s)
   2064 	{
   2065 	return(s->method);
   2066 	}
   2067 
   2068 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
   2069 	{
   2070 	int conn= -1;
   2071 	int ret=1;
   2072 
   2073 	if (s->method != meth)
   2074 		{
   2075 		if (s->handshake_func != NULL)
   2076 			conn=(s->handshake_func == s->method->ssl_connect);
   2077 
   2078 		if (s->method->version == meth->version)
   2079 			s->method=meth;
   2080 		else
   2081 			{
   2082 			s->method->ssl_free(s);
   2083 			s->method=meth;
   2084 			ret=s->method->ssl_new(s);
   2085 			}
   2086 
   2087 		if (conn == 1)
   2088 			s->handshake_func=meth->ssl_connect;
   2089 		else if (conn == 0)
   2090 			s->handshake_func=meth->ssl_accept;
   2091 		}
   2092 	return(ret);
   2093 	}
   2094 
   2095 int SSL_get_error(const SSL *s,int i)
   2096 	{
   2097 	int reason;
   2098 	unsigned long l;
   2099 	BIO *bio;
   2100 
   2101 	if (i > 0) return(SSL_ERROR_NONE);
   2102 
   2103 	/* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
   2104 	 * etc, where we do encode the error */
   2105 	if ((l=ERR_peek_error()) != 0)
   2106 		{
   2107 		if (ERR_GET_LIB(l) == ERR_LIB_SYS)
   2108 			return(SSL_ERROR_SYSCALL);
   2109 		else
   2110 			return(SSL_ERROR_SSL);
   2111 		}
   2112 
   2113 	if ((i < 0) && SSL_want_read(s))
   2114 		{
   2115 		bio=SSL_get_rbio(s);
   2116 		if (BIO_should_read(bio))
   2117 			return(SSL_ERROR_WANT_READ);
   2118 		else if (BIO_should_write(bio))
   2119 			/* This one doesn't make too much sense ... We never try
   2120 			 * to write to the rbio, and an application program where
   2121 			 * rbio and wbio are separate couldn't even know what it
   2122 			 * should wait for.
   2123 			 * However if we ever set s->rwstate incorrectly
   2124 			 * (so that we have SSL_want_read(s) instead of
   2125 			 * SSL_want_write(s)) and rbio and wbio *are* the same,
   2126 			 * this test works around that bug; so it might be safer
   2127 			 * to keep it. */
   2128 			return(SSL_ERROR_WANT_WRITE);
   2129 		else if (BIO_should_io_special(bio))
   2130 			{
   2131 			reason=BIO_get_retry_reason(bio);
   2132 			if (reason == BIO_RR_CONNECT)
   2133 				return(SSL_ERROR_WANT_CONNECT);
   2134 			else if (reason == BIO_RR_ACCEPT)
   2135 				return(SSL_ERROR_WANT_ACCEPT);
   2136 			else
   2137 				return(SSL_ERROR_SYSCALL); /* unknown */
   2138 			}
   2139 		}
   2140 
   2141 	if ((i < 0) && SSL_want_write(s))
   2142 		{
   2143 		bio=SSL_get_wbio(s);
   2144 		if (BIO_should_write(bio))
   2145 			return(SSL_ERROR_WANT_WRITE);
   2146 		else if (BIO_should_read(bio))
   2147 			/* See above (SSL_want_read(s) with BIO_should_write(bio)) */
   2148 			return(SSL_ERROR_WANT_READ);
   2149 		else if (BIO_should_io_special(bio))
   2150 			{
   2151 			reason=BIO_get_retry_reason(bio);
   2152 			if (reason == BIO_RR_CONNECT)
   2153 				return(SSL_ERROR_WANT_CONNECT);
   2154 			else if (reason == BIO_RR_ACCEPT)
   2155 				return(SSL_ERROR_WANT_ACCEPT);
   2156 			else
   2157 				return(SSL_ERROR_SYSCALL);
   2158 			}
   2159 		}
   2160 	if ((i < 0) && SSL_want_x509_lookup(s))
   2161 		{
   2162 		return(SSL_ERROR_WANT_X509_LOOKUP);
   2163 		}
   2164 
   2165 	if (i == 0)
   2166 		{
   2167 		if (s->version == SSL2_VERSION)
   2168 			{
   2169 			/* assume it is the socket being closed */
   2170 			return(SSL_ERROR_ZERO_RETURN);
   2171 			}
   2172 		else
   2173 			{
   2174 			if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
   2175 				(s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
   2176 				return(SSL_ERROR_ZERO_RETURN);
   2177 			}
   2178 		}
   2179 	return(SSL_ERROR_SYSCALL);
   2180 	}
   2181 
   2182 int SSL_do_handshake(SSL *s)
   2183 	{
   2184 	int ret=1;
   2185 
   2186 	if (s->handshake_func == NULL)
   2187 		{
   2188 		SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
   2189 		return(-1);
   2190 		}
   2191 
   2192 	s->method->ssl_renegotiate_check(s);
   2193 
   2194 	if (SSL_in_init(s) || SSL_in_before(s))
   2195 		{
   2196 		ret=s->handshake_func(s);
   2197 		}
   2198 	return(ret);
   2199 	}
   2200 
   2201 /* For the next 2 functions, SSL_clear() sets shutdown and so
   2202  * one of these calls will reset it */
   2203 void SSL_set_accept_state(SSL *s)
   2204 	{
   2205 	s->server=1;
   2206 	s->shutdown=0;
   2207 	s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
   2208 	s->handshake_func=s->method->ssl_accept;
   2209 	/* clear the current cipher */
   2210 	ssl_clear_cipher_ctx(s);
   2211 	}
   2212 
   2213 void SSL_set_connect_state(SSL *s)
   2214 	{
   2215 	s->server=0;
   2216 	s->shutdown=0;
   2217 	s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
   2218 	s->handshake_func=s->method->ssl_connect;
   2219 	/* clear the current cipher */
   2220 	ssl_clear_cipher_ctx(s);
   2221 	}
   2222 
   2223 int ssl_undefined_function(SSL *s)
   2224 	{
   2225 	SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
   2226 	return(0);
   2227 	}
   2228 
   2229 int ssl_undefined_void_function(void)
   2230 	{
   2231 	SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
   2232 	return(0);
   2233 	}
   2234 
   2235 int ssl_undefined_const_function(const SSL *s)
   2236 	{
   2237 	SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
   2238 	return(0);
   2239 	}
   2240 
   2241 SSL_METHOD *ssl_bad_method(int ver)
   2242 	{
   2243 	SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
   2244 	return(NULL);
   2245 	}
   2246 
   2247 const char *SSL_get_version(const SSL *s)
   2248 	{
   2249 	if (s->version == TLS1_VERSION)
   2250 		return("TLSv1");
   2251 	else if (s->version == SSL3_VERSION)
   2252 		return("SSLv3");
   2253 	else if (s->version == SSL2_VERSION)
   2254 		return("SSLv2");
   2255 	else
   2256 		return("unknown");
   2257 	}
   2258 
   2259 SSL *SSL_dup(SSL *s)
   2260 	{
   2261 	STACK_OF(X509_NAME) *sk;
   2262 	X509_NAME *xn;
   2263 	SSL *ret;
   2264 	int i;
   2265 
   2266 	if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
   2267 	    return(NULL);
   2268 
   2269 	ret->version = s->version;
   2270 	ret->type = s->type;
   2271 	ret->method = s->method;
   2272 
   2273 	if (s->session != NULL)
   2274 		{
   2275 		/* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
   2276 		SSL_copy_session_id(ret,s);
   2277 		}
   2278 	else
   2279 		{
   2280 		/* No session has been established yet, so we have to expect
   2281 		 * that s->cert or ret->cert will be changed later --
   2282 		 * they should not both point to the same object,
   2283 		 * and thus we can't use SSL_copy_session_id. */
   2284 
   2285 		ret->method->ssl_free(ret);
   2286 		ret->method = s->method;
   2287 		ret->method->ssl_new(ret);
   2288 
   2289 		if (s->cert != NULL)
   2290 			{
   2291 			if (ret->cert != NULL)
   2292 				{
   2293 				ssl_cert_free(ret->cert);
   2294 				}
   2295 			ret->cert = ssl_cert_dup(s->cert);
   2296 			if (ret->cert == NULL)
   2297 				goto err;
   2298 			}
   2299 
   2300 		SSL_set_session_id_context(ret,
   2301 			s->sid_ctx, s->sid_ctx_length);
   2302 		}
   2303 
   2304 	ret->options=s->options;
   2305 	ret->mode=s->mode;
   2306 	SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
   2307 	SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
   2308 	ret->msg_callback = s->msg_callback;
   2309 	ret->msg_callback_arg = s->msg_callback_arg;
   2310 	SSL_set_verify(ret,SSL_get_verify_mode(s),
   2311 		SSL_get_verify_callback(s));
   2312 	SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
   2313 	ret->generate_session_id = s->generate_session_id;
   2314 
   2315 	SSL_set_info_callback(ret,SSL_get_info_callback(s));
   2316 
   2317 	ret->debug=s->debug;
   2318 
   2319 	/* copy app data, a little dangerous perhaps */
   2320 	if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
   2321 		goto err;
   2322 
   2323 	/* setup rbio, and wbio */
   2324 	if (s->rbio != NULL)
   2325 		{
   2326 		if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
   2327 			goto err;
   2328 		}
   2329 	if (s->wbio != NULL)
   2330 		{
   2331 		if (s->wbio != s->rbio)
   2332 			{
   2333 			if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
   2334 				goto err;
   2335 			}
   2336 		else
   2337 			ret->wbio=ret->rbio;
   2338 		}
   2339 	ret->rwstate = s->rwstate;
   2340 	ret->in_handshake = s->in_handshake;
   2341 	ret->handshake_func = s->handshake_func;
   2342 	ret->server = s->server;
   2343 	ret->new_session = s->new_session;
   2344 	ret->quiet_shutdown = s->quiet_shutdown;
   2345 	ret->shutdown=s->shutdown;
   2346 	ret->state=s->state; /* SSL_dup does not really work at any state, though */
   2347 	ret->rstate=s->rstate;
   2348 	ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
   2349 	ret->hit=s->hit;
   2350 
   2351 	X509_VERIFY_PARAM_inherit(ret->param, s->param);
   2352 
   2353 	/* dup the cipher_list and cipher_list_by_id stacks */
   2354 	if (s->cipher_list != NULL)
   2355 		{
   2356 		if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
   2357 			goto err;
   2358 		}
   2359 	if (s->cipher_list_by_id != NULL)
   2360 		if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
   2361 			== NULL)
   2362 			goto err;
   2363 
   2364 	/* Dup the client_CA list */
   2365 	if (s->client_CA != NULL)
   2366 		{
   2367 		if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
   2368 		ret->client_CA=sk;
   2369 		for (i=0; i<sk_X509_NAME_num(sk); i++)
   2370 			{
   2371 			xn=sk_X509_NAME_value(sk,i);
   2372 			if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
   2373 				{
   2374 				X509_NAME_free(xn);
   2375 				goto err;
   2376 				}
   2377 			}
   2378 		}
   2379 
   2380 	if (0)
   2381 		{
   2382 err:
   2383 		if (ret != NULL) SSL_free(ret);
   2384 		ret=NULL;
   2385 		}
   2386 	return(ret);
   2387 	}
   2388 
   2389 void ssl_clear_cipher_ctx(SSL *s)
   2390 	{
   2391 	if (s->enc_read_ctx != NULL)
   2392 		{
   2393 		EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
   2394 		OPENSSL_free(s->enc_read_ctx);
   2395 		s->enc_read_ctx=NULL;
   2396 		}
   2397 	if (s->enc_write_ctx != NULL)
   2398 		{
   2399 		EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
   2400 		OPENSSL_free(s->enc_write_ctx);
   2401 		s->enc_write_ctx=NULL;
   2402 		}
   2403 #ifndef OPENSSL_NO_COMP
   2404 	if (s->expand != NULL)
   2405 		{
   2406 		COMP_CTX_free(s->expand);
   2407 		s->expand=NULL;
   2408 		}
   2409 	if (s->compress != NULL)
   2410 		{
   2411 		COMP_CTX_free(s->compress);
   2412 		s->compress=NULL;
   2413 		}
   2414 #endif
   2415 	}
   2416 
   2417 /* Fix this function so that it takes an optional type parameter */
   2418 X509 *SSL_get_certificate(const SSL *s)
   2419 	{
   2420 	if (s->cert != NULL)
   2421 		return(s->cert->key->x509);
   2422 	else
   2423 		return(NULL);
   2424 	}
   2425 
   2426 /* Fix this function so that it takes an optional type parameter */
   2427 EVP_PKEY *SSL_get_privatekey(SSL *s)
   2428 	{
   2429 	if (s->cert != NULL)
   2430 		return(s->cert->key->privatekey);
   2431 	else
   2432 		return(NULL);
   2433 	}
   2434 
   2435 SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
   2436 	{
   2437 	if ((s->session != NULL) && (s->session->cipher != NULL))
   2438 		return(s->session->cipher);
   2439 	return(NULL);
   2440 	}
   2441 #ifdef OPENSSL_NO_COMP
   2442 const void *SSL_get_current_compression(SSL *s)
   2443 	{
   2444 	return NULL;
   2445 	}
   2446 const void *SSL_get_current_expansion(SSL *s)
   2447 	{
   2448 	return NULL;
   2449 	}
   2450 #else
   2451 
   2452 const COMP_METHOD *SSL_get_current_compression(SSL *s)
   2453 	{
   2454 	if (s->compress != NULL)
   2455 		return(s->compress->meth);
   2456 	return(NULL);
   2457 	}
   2458 
   2459 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
   2460 	{
   2461 	if (s->expand != NULL)
   2462 		return(s->expand->meth);
   2463 	return(NULL);
   2464 	}
   2465 #endif
   2466 
   2467 int ssl_init_wbio_buffer(SSL *s,int push)
   2468 	{
   2469 	BIO *bbio;
   2470 
   2471 	if (s->bbio == NULL)
   2472 		{
   2473 		bbio=BIO_new(BIO_f_buffer());
   2474 		if (bbio == NULL) return(0);
   2475 		s->bbio=bbio;
   2476 		}
   2477 	else
   2478 		{
   2479 		bbio=s->bbio;
   2480 		if (s->bbio == s->wbio)
   2481 			s->wbio=BIO_pop(s->wbio);
   2482 		}
   2483 	(void)BIO_reset(bbio);
   2484 /*	if (!BIO_set_write_buffer_size(bbio,16*1024)) */
   2485 	if (!BIO_set_read_buffer_size(bbio,1))
   2486 		{
   2487 		SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
   2488 		return(0);
   2489 		}
   2490 	if (push)
   2491 		{
   2492 		if (s->wbio != bbio)
   2493 			s->wbio=BIO_push(bbio,s->wbio);
   2494 		}
   2495 	else
   2496 		{
   2497 		if (s->wbio == bbio)
   2498 			s->wbio=BIO_pop(bbio);
   2499 		}
   2500 	return(1);
   2501 	}
   2502 
   2503 void ssl_free_wbio_buffer(SSL *s)
   2504 	{
   2505 	if (s->bbio == NULL) return;
   2506 
   2507 	if (s->bbio == s->wbio)
   2508 		{
   2509 		/* remove buffering */
   2510 		s->wbio=BIO_pop(s->wbio);
   2511 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
   2512 		assert(s->wbio != NULL);
   2513 #endif
   2514 	}
   2515 	BIO_free(s->bbio);
   2516 	s->bbio=NULL;
   2517 	}
   2518 
   2519 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
   2520 	{
   2521 	ctx->quiet_shutdown=mode;
   2522 	}
   2523 
   2524 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
   2525 	{
   2526 	return(ctx->quiet_shutdown);
   2527 	}
   2528 
   2529 void SSL_set_quiet_shutdown(SSL *s,int mode)
   2530 	{
   2531 	s->quiet_shutdown=mode;
   2532 	}
   2533 
   2534 int SSL_get_quiet_shutdown(const SSL *s)
   2535 	{
   2536 	return(s->quiet_shutdown);
   2537 	}
   2538 
   2539 void SSL_set_shutdown(SSL *s,int mode)
   2540 	{
   2541 	s->shutdown=mode;
   2542 	}
   2543 
   2544 int SSL_get_shutdown(const SSL *s)
   2545 	{
   2546 	return(s->shutdown);
   2547 	}
   2548 
   2549 int SSL_version(const SSL *s)
   2550 	{
   2551 	return(s->version);
   2552 	}
   2553 
   2554 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
   2555 	{
   2556 	return(ssl->ctx);
   2557 	}
   2558 
   2559 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
   2560 	{
   2561 	if (ssl->ctx == ctx)
   2562 		return ssl->ctx;
   2563 #ifndef OPENSSL_NO_TLSEXT
   2564 	if (ctx == NULL)
   2565 		ctx = ssl->initial_ctx;
   2566 #endif
   2567 	if (ssl->cert != NULL)
   2568 		ssl_cert_free(ssl->cert);
   2569 	ssl->cert = ssl_cert_dup(ctx->cert);
   2570 	CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
   2571 	if (ssl->ctx != NULL)
   2572 		SSL_CTX_free(ssl->ctx); /* decrement reference count */
   2573 	ssl->ctx = ctx;
   2574 	return(ssl->ctx);
   2575 	}
   2576 
   2577 #ifndef OPENSSL_NO_STDIO
   2578 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
   2579 	{
   2580 	return(X509_STORE_set_default_paths(ctx->cert_store));
   2581 	}
   2582 
   2583 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
   2584 		const char *CApath)
   2585 	{
   2586 	return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
   2587 	}
   2588 #endif
   2589 
   2590 void SSL_set_info_callback(SSL *ssl,
   2591 	void (*cb)(const SSL *ssl,int type,int val))
   2592 	{
   2593 	ssl->info_callback=cb;
   2594 	}
   2595 
   2596 /* One compiler (Diab DCC) doesn't like argument names in returned
   2597    function pointer.  */
   2598 void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
   2599 	{
   2600 	return ssl->info_callback;
   2601 	}
   2602 
   2603 int SSL_state(const SSL *ssl)
   2604 	{
   2605 	return(ssl->state);
   2606 	}
   2607 
   2608 void SSL_set_verify_result(SSL *ssl,long arg)
   2609 	{
   2610 	ssl->verify_result=arg;
   2611 	}
   2612 
   2613 long SSL_get_verify_result(const SSL *ssl)
   2614 	{
   2615 	return(ssl->verify_result);
   2616 	}
   2617 
   2618 int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
   2619 			 CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
   2620 	{
   2621 	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
   2622 				new_func, dup_func, free_func);
   2623 	}
   2624 
   2625 int SSL_set_ex_data(SSL *s,int idx,void *arg)
   2626 	{
   2627 	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
   2628 	}
   2629 
   2630 void *SSL_get_ex_data(const SSL *s,int idx)
   2631 	{
   2632 	return(CRYPTO_get_ex_data(&s->ex_data,idx));
   2633 	}
   2634 
   2635 int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,
   2636 			     CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)
   2637 	{
   2638 	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
   2639 				new_func, dup_func, free_func);
   2640 	}
   2641 
   2642 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
   2643 	{
   2644 	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
   2645 	}
   2646 
   2647 void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)
   2648 	{
   2649 	return(CRYPTO_get_ex_data(&s->ex_data,idx));
   2650 	}
   2651 
   2652 int ssl_ok(SSL *s)
   2653 	{
   2654 	return(1);
   2655 	}
   2656 
   2657 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
   2658 	{
   2659 	return(ctx->cert_store);
   2660 	}
   2661 
   2662 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
   2663 	{
   2664 	if (ctx->cert_store != NULL)
   2665 		X509_STORE_free(ctx->cert_store);
   2666 	ctx->cert_store=store;
   2667 	}
   2668 
   2669 int SSL_want(const SSL *s)
   2670 	{
   2671 	return(s->rwstate);
   2672 	}
   2673 
   2674 /*!
   2675  * \brief Set the callback for generating temporary RSA keys.
   2676  * \param ctx the SSL context.
   2677  * \param cb the callback
   2678  */
   2679 
   2680 #ifndef OPENSSL_NO_RSA
   2681 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
   2682 							  int is_export,
   2683 							  int keylength))
   2684     {
   2685     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
   2686     }
   2687 
   2688 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
   2689 						  int is_export,
   2690 						  int keylength))
   2691     {
   2692     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
   2693     }
   2694 #endif
   2695 
   2696 #ifdef DOXYGEN
   2697 /*!
   2698  * \brief The RSA temporary key callback function.
   2699  * \param ssl the SSL session.
   2700  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
   2701  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
   2702  * of the required key in bits.
   2703  * \return the temporary RSA key.
   2704  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
   2705  */
   2706 
   2707 RSA *cb(SSL *ssl,int is_export,int keylength)
   2708     {}
   2709 #endif
   2710 
   2711 /*!
   2712  * \brief Set the callback for generating temporary DH keys.
   2713  * \param ctx the SSL context.
   2714  * \param dh the callback
   2715  */
   2716 
   2717 #ifndef OPENSSL_NO_DH
   2718 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
   2719 							int keylength))
   2720 	{
   2721 	SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
   2722 	}
   2723 
   2724 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
   2725 						int keylength))
   2726 	{
   2727 	SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
   2728 	}
   2729 #endif
   2730 
   2731 #ifndef OPENSSL_NO_ECDH
   2732 void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
   2733 							int keylength))
   2734 	{
   2735 	SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
   2736 	}
   2737 
   2738 void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
   2739 						int keylength))
   2740 	{
   2741 	SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
   2742 	}
   2743 #endif
   2744 
   2745 
   2746 void SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
   2747 	{
   2748 	SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
   2749 	}
   2750 void SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
   2751 	{
   2752 	SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
   2753 	}
   2754 
   2755 int SSL_cutthrough_complete(const SSL *s)
   2756 	{
   2757 	return (!s->server &&                 /* cutthrough only applies to clients */
   2758 		!s->hit &&                        /* full-handshake */
   2759 		s->version >= SSL3_VERSION &&
   2760 		s->s3->in_read_app_data == 0 &&   /* cutthrough only applies to write() */
   2761 		(SSL_get_mode((SSL*)s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) &&  /* cutthrough enabled */
   2762 		SSL_get_cipher_bits(s, NULL) >= 128 &&                      /* strong cipher choosen */
   2763 		(s->state == SSL3_ST_CR_SESSION_TICKET_A ||                 /* ready to write app-data*/
   2764 			s->state == SSL3_ST_CR_FINISHED_A));
   2765 	}
   2766 
   2767 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
   2768 #include "../crypto/bio/bss_file.c"
   2769 #endif
   2770 
   2771 IMPLEMENT_STACK_OF(SSL_CIPHER)
   2772 IMPLEMENT_STACK_OF(SSL_COMP)
   2773