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authorParménides GV <parmegv@sdf.org>2014-12-12 18:02:40 +0100
committerParménides GV <parmegv@sdf.org>2014-12-12 18:04:08 +0100
commit97aded26654ede8204a313dd6967b678a72a2a10 (patch)
tree5c519d75774eff664df41881777cbae171caddf5 /ics-openvpn-stripped/main/openssl/ssl/t1_lib.c
parent0e7e4005460964cf8dac080e3d99e1df2a1bdc4d (diff)
Updated ics-openvpn to last rev 14 Nov 2014.
Material design! It still doesn't run properly on my tablet, openvpn keeps getting down and exiting.
Diffstat (limited to 'ics-openvpn-stripped/main/openssl/ssl/t1_lib.c')
-rw-r--r--ics-openvpn-stripped/main/openssl/ssl/t1_lib.c2990
1 files changed, 0 insertions, 2990 deletions
diff --git a/ics-openvpn-stripped/main/openssl/ssl/t1_lib.c b/ics-openvpn-stripped/main/openssl/ssl/t1_lib.c
deleted file mode 100644
index d0b893b5..00000000
--- a/ics-openvpn-stripped/main/openssl/ssl/t1_lib.c
+++ /dev/null
@@ -1,2990 +0,0 @@
-/* ssl/t1_lib.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-#include <stdio.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-#include <openssl/hmac.h>
-#include <openssl/ocsp.h>
-#include <openssl/rand.h>
-#include "ssl_locl.h"
-
-const char tls1_version_str[]="TLSv1" OPENSSL_VERSION_PTEXT;
-
-#ifndef OPENSSL_NO_TLSEXT
-static int tls_decrypt_ticket(SSL *s, const unsigned char *tick, int ticklen,
- const unsigned char *sess_id, int sesslen,
- SSL_SESSION **psess);
-#endif
-
-SSL3_ENC_METHOD TLSv1_enc_data={
- tls1_enc,
- tls1_mac,
- tls1_setup_key_block,
- tls1_generate_master_secret,
- tls1_change_cipher_state,
- tls1_final_finish_mac,
- TLS1_FINISH_MAC_LENGTH,
- tls1_cert_verify_mac,
- TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
- TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
- tls1_alert_code,
- tls1_export_keying_material,
- };
-
-long tls1_default_timeout(void)
- {
- /* 2 hours, the 24 hours mentioned in the TLSv1 spec
- * is way too long for http, the cache would over fill */
- return(60*60*2);
- }
-
-int tls1_new(SSL *s)
- {
- if (!ssl3_new(s)) return(0);
- s->method->ssl_clear(s);
- return(1);
- }
-
-void tls1_free(SSL *s)
- {
-#ifndef OPENSSL_NO_TLSEXT
- if (s->tlsext_session_ticket)
- {
- OPENSSL_free(s->tlsext_session_ticket);
- }
-#endif /* OPENSSL_NO_TLSEXT */
- ssl3_free(s);
- }
-
-void tls1_clear(SSL *s)
- {
- ssl3_clear(s);
- s->version = s->method->version;
- }
-
-#ifndef OPENSSL_NO_EC
-
-static int nid_list[] =
- {
- NID_sect163k1, /* sect163k1 (1) */
- NID_sect163r1, /* sect163r1 (2) */
- NID_sect163r2, /* sect163r2 (3) */
- NID_sect193r1, /* sect193r1 (4) */
- NID_sect193r2, /* sect193r2 (5) */
- NID_sect233k1, /* sect233k1 (6) */
- NID_sect233r1, /* sect233r1 (7) */
- NID_sect239k1, /* sect239k1 (8) */
- NID_sect283k1, /* sect283k1 (9) */
- NID_sect283r1, /* sect283r1 (10) */
- NID_sect409k1, /* sect409k1 (11) */
- NID_sect409r1, /* sect409r1 (12) */
- NID_sect571k1, /* sect571k1 (13) */
- NID_sect571r1, /* sect571r1 (14) */
- NID_secp160k1, /* secp160k1 (15) */
- NID_secp160r1, /* secp160r1 (16) */
- NID_secp160r2, /* secp160r2 (17) */
- NID_secp192k1, /* secp192k1 (18) */
- NID_X9_62_prime192v1, /* secp192r1 (19) */
- NID_secp224k1, /* secp224k1 (20) */
- NID_secp224r1, /* secp224r1 (21) */
- NID_secp256k1, /* secp256k1 (22) */
- NID_X9_62_prime256v1, /* secp256r1 (23) */
- NID_secp384r1, /* secp384r1 (24) */
- NID_secp521r1 /* secp521r1 (25) */
- };
-
-static int pref_list[] =
- {
- NID_sect571r1, /* sect571r1 (14) */
- NID_sect571k1, /* sect571k1 (13) */
- NID_secp521r1, /* secp521r1 (25) */
- NID_sect409k1, /* sect409k1 (11) */
- NID_sect409r1, /* sect409r1 (12) */
- NID_secp384r1, /* secp384r1 (24) */
- NID_sect283k1, /* sect283k1 (9) */
- NID_sect283r1, /* sect283r1 (10) */
- NID_secp256k1, /* secp256k1 (22) */
- NID_X9_62_prime256v1, /* secp256r1 (23) */
- NID_sect239k1, /* sect239k1 (8) */
- NID_sect233k1, /* sect233k1 (6) */
- NID_sect233r1, /* sect233r1 (7) */
- NID_secp224k1, /* secp224k1 (20) */
- NID_secp224r1, /* secp224r1 (21) */
- NID_sect193r1, /* sect193r1 (4) */
- NID_sect193r2, /* sect193r2 (5) */
- NID_secp192k1, /* secp192k1 (18) */
- NID_X9_62_prime192v1, /* secp192r1 (19) */
- NID_sect163k1, /* sect163k1 (1) */
- NID_sect163r1, /* sect163r1 (2) */
- NID_sect163r2, /* sect163r2 (3) */
- NID_secp160k1, /* secp160k1 (15) */
- NID_secp160r1, /* secp160r1 (16) */
- NID_secp160r2, /* secp160r2 (17) */
- };
-
-int tls1_ec_curve_id2nid(int curve_id)
- {
- /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
- if ((curve_id < 1) || ((unsigned int)curve_id >
- sizeof(nid_list)/sizeof(nid_list[0])))
- return 0;
- return nid_list[curve_id-1];
- }
-
-int tls1_ec_nid2curve_id(int nid)
- {
- /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
- switch (nid)
- {
- case NID_sect163k1: /* sect163k1 (1) */
- return 1;
- case NID_sect163r1: /* sect163r1 (2) */
- return 2;
- case NID_sect163r2: /* sect163r2 (3) */
- return 3;
- case NID_sect193r1: /* sect193r1 (4) */
- return 4;
- case NID_sect193r2: /* sect193r2 (5) */
- return 5;
- case NID_sect233k1: /* sect233k1 (6) */
- return 6;
- case NID_sect233r1: /* sect233r1 (7) */
- return 7;
- case NID_sect239k1: /* sect239k1 (8) */
- return 8;
- case NID_sect283k1: /* sect283k1 (9) */
- return 9;
- case NID_sect283r1: /* sect283r1 (10) */
- return 10;
- case NID_sect409k1: /* sect409k1 (11) */
- return 11;
- case NID_sect409r1: /* sect409r1 (12) */
- return 12;
- case NID_sect571k1: /* sect571k1 (13) */
- return 13;
- case NID_sect571r1: /* sect571r1 (14) */
- return 14;
- case NID_secp160k1: /* secp160k1 (15) */
- return 15;
- case NID_secp160r1: /* secp160r1 (16) */
- return 16;
- case NID_secp160r2: /* secp160r2 (17) */
- return 17;
- case NID_secp192k1: /* secp192k1 (18) */
- return 18;
- case NID_X9_62_prime192v1: /* secp192r1 (19) */
- return 19;
- case NID_secp224k1: /* secp224k1 (20) */
- return 20;
- case NID_secp224r1: /* secp224r1 (21) */
- return 21;
- case NID_secp256k1: /* secp256k1 (22) */
- return 22;
- case NID_X9_62_prime256v1: /* secp256r1 (23) */
- return 23;
- case NID_secp384r1: /* secp384r1 (24) */
- return 24;
- case NID_secp521r1: /* secp521r1 (25) */
- return 25;
- default:
- return 0;
- }
- }
-#endif /* OPENSSL_NO_EC */
-
-#ifndef OPENSSL_NO_TLSEXT
-
-/* List of supported signature algorithms and hashes. Should make this
- * customisable at some point, for now include everything we support.
- */
-
-#ifdef OPENSSL_NO_RSA
-#define tlsext_sigalg_rsa(md) /* */
-#else
-#define tlsext_sigalg_rsa(md) md, TLSEXT_signature_rsa,
-#endif
-
-#ifdef OPENSSL_NO_DSA
-#define tlsext_sigalg_dsa(md) /* */
-#else
-#define tlsext_sigalg_dsa(md) md, TLSEXT_signature_dsa,
-#endif
-
-#ifdef OPENSSL_NO_ECDSA
-#define tlsext_sigalg_ecdsa(md) /* */
-#else
-#define tlsext_sigalg_ecdsa(md) md, TLSEXT_signature_ecdsa,
-#endif
-
-#define tlsext_sigalg(md) \
- tlsext_sigalg_rsa(md) \
- tlsext_sigalg_dsa(md) \
- tlsext_sigalg_ecdsa(md)
-
-static unsigned char tls12_sigalgs[] = {
-#ifndef OPENSSL_NO_SHA512
- tlsext_sigalg(TLSEXT_hash_sha512)
- tlsext_sigalg(TLSEXT_hash_sha384)
-#endif
-#ifndef OPENSSL_NO_SHA256
- tlsext_sigalg(TLSEXT_hash_sha256)
- tlsext_sigalg(TLSEXT_hash_sha224)
-#endif
-#ifndef OPENSSL_NO_SHA
- tlsext_sigalg(TLSEXT_hash_sha1)
-#endif
-};
-
-int tls12_get_req_sig_algs(SSL *s, unsigned char *p)
- {
- size_t slen = sizeof(tls12_sigalgs);
- if (p)
- memcpy(p, tls12_sigalgs, slen);
- return (int)slen;
- }
-
-unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *buf, unsigned char *limit)
- {
- int extdatalen=0;
- unsigned char *orig = buf;
- unsigned char *ret = buf;
-
- /* don't add extensions for SSLv3 unless doing secure renegotiation */
- if (s->client_version == SSL3_VERSION
- && !s->s3->send_connection_binding)
- return orig;
-
- ret+=2;
-
- if (ret>=limit) return NULL; /* this really never occurs, but ... */
-
- if (s->tlsext_hostname != NULL)
- {
- /* Add TLS extension servername to the Client Hello message */
- unsigned long size_str;
- long lenmax;
-
- /* check for enough space.
- 4 for the servername type and entension length
- 2 for servernamelist length
- 1 for the hostname type
- 2 for hostname length
- + hostname length
- */
-
- if ((lenmax = limit - ret - 9) < 0
- || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
- return NULL;
-
- /* extension type and length */
- s2n(TLSEXT_TYPE_server_name,ret);
- s2n(size_str+5,ret);
-
- /* length of servername list */
- s2n(size_str+3,ret);
-
- /* hostname type, length and hostname */
- *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
- s2n(size_str,ret);
- memcpy(ret, s->tlsext_hostname, size_str);
- ret+=size_str;
- }
-
- /* Add RI if renegotiating */
- if (s->renegotiate)
- {
- int el;
-
- if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
- {
- SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- if((limit - ret - 4 - el) < 0) return NULL;
-
- s2n(TLSEXT_TYPE_renegotiate,ret);
- s2n(el,ret);
-
- if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
- {
- SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- ret += el;
- }
-
-#ifndef OPENSSL_NO_SRP
- /* Add SRP username if there is one */
- if (s->srp_ctx.login != NULL)
- { /* Add TLS extension SRP username to the Client Hello message */
-
- int login_len = strlen(s->srp_ctx.login);
- if (login_len > 255 || login_len == 0)
- {
- SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- /* check for enough space.
- 4 for the srp type type and entension length
- 1 for the srp user identity
- + srp user identity length
- */
- if ((limit - ret - 5 - login_len) < 0) return NULL;
-
- /* fill in the extension */
- s2n(TLSEXT_TYPE_srp,ret);
- s2n(login_len+1,ret);
- (*ret++) = (unsigned char) login_len;
- memcpy(ret, s->srp_ctx.login, login_len);
- ret+=login_len;
- }
-#endif
-
-#ifndef OPENSSL_NO_EC
- if (s->tlsext_ecpointformatlist != NULL)
- {
- /* Add TLS extension ECPointFormats to the ClientHello message */
- long lenmax;
-
- if ((lenmax = limit - ret - 5) < 0) return NULL;
- if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
- if (s->tlsext_ecpointformatlist_length > 255)
- {
- SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- s2n(TLSEXT_TYPE_ec_point_formats,ret);
- s2n(s->tlsext_ecpointformatlist_length + 1,ret);
- *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
- memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
- ret+=s->tlsext_ecpointformatlist_length;
- }
- if (s->tlsext_ellipticcurvelist != NULL)
- {
- /* Add TLS extension EllipticCurves to the ClientHello message */
- long lenmax;
-
- if ((lenmax = limit - ret - 6) < 0) return NULL;
- if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
- if (s->tlsext_ellipticcurvelist_length > 65532)
- {
- SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- s2n(TLSEXT_TYPE_elliptic_curves,ret);
- s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
-
- /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
- * elliptic_curve_list, but the examples use two bytes.
- * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
- * resolves this to two bytes.
- */
- s2n(s->tlsext_ellipticcurvelist_length, ret);
- memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
- ret+=s->tlsext_ellipticcurvelist_length;
- }
-#endif /* OPENSSL_NO_EC */
-
- if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
- {
- int ticklen;
- if (!s->new_session && s->session && s->session->tlsext_tick)
- ticklen = s->session->tlsext_ticklen;
- else if (s->session && s->tlsext_session_ticket &&
- s->tlsext_session_ticket->data)
- {
- ticklen = s->tlsext_session_ticket->length;
- s->session->tlsext_tick = OPENSSL_malloc(ticklen);
- if (!s->session->tlsext_tick)
- return NULL;
- memcpy(s->session->tlsext_tick,
- s->tlsext_session_ticket->data,
- ticklen);
- s->session->tlsext_ticklen = ticklen;
- }
- else
- ticklen = 0;
- if (ticklen == 0 && s->tlsext_session_ticket &&
- s->tlsext_session_ticket->data == NULL)
- goto skip_ext;
- /* Check for enough room 2 for extension type, 2 for len
- * rest for ticket
- */
- if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
- s2n(TLSEXT_TYPE_session_ticket,ret);
- s2n(ticklen,ret);
- if (ticklen)
- {
- memcpy(ret, s->session->tlsext_tick, ticklen);
- ret += ticklen;
- }
- }
- skip_ext:
-
- if (TLS1_get_client_version(s) >= TLS1_2_VERSION)
- {
- if ((size_t)(limit - ret) < sizeof(tls12_sigalgs) + 6)
- return NULL;
- s2n(TLSEXT_TYPE_signature_algorithms,ret);
- s2n(sizeof(tls12_sigalgs) + 2, ret);
- s2n(sizeof(tls12_sigalgs), ret);
- memcpy(ret, tls12_sigalgs, sizeof(tls12_sigalgs));
- ret += sizeof(tls12_sigalgs);
- }
-
-#ifdef TLSEXT_TYPE_opaque_prf_input
- if (s->s3->client_opaque_prf_input != NULL &&
- s->version != DTLS1_VERSION)
- {
- size_t col = s->s3->client_opaque_prf_input_len;
-
- if ((long)(limit - ret - 6 - col < 0))
- return NULL;
- if (col > 0xFFFD) /* can't happen */
- return NULL;
-
- s2n(TLSEXT_TYPE_opaque_prf_input, ret);
- s2n(col + 2, ret);
- s2n(col, ret);
- memcpy(ret, s->s3->client_opaque_prf_input, col);
- ret += col;
- }
-#endif
-
- if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
- s->version != DTLS1_VERSION)
- {
- int i;
- long extlen, idlen, itmp;
- OCSP_RESPID *id;
-
- idlen = 0;
- for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
- {
- id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
- itmp = i2d_OCSP_RESPID(id, NULL);
- if (itmp <= 0)
- return NULL;
- idlen += itmp + 2;
- }
-
- if (s->tlsext_ocsp_exts)
- {
- extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
- if (extlen < 0)
- return NULL;
- }
- else
- extlen = 0;
-
- if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
- s2n(TLSEXT_TYPE_status_request, ret);
- if (extlen + idlen > 0xFFF0)
- return NULL;
- s2n(extlen + idlen + 5, ret);
- *(ret++) = TLSEXT_STATUSTYPE_ocsp;
- s2n(idlen, ret);
- for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
- {
- /* save position of id len */
- unsigned char *q = ret;
- id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
- /* skip over id len */
- ret += 2;
- itmp = i2d_OCSP_RESPID(id, &ret);
- /* write id len */
- s2n(itmp, q);
- }
- s2n(extlen, ret);
- if (extlen > 0)
- i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
- }
-
-#ifndef OPENSSL_NO_HEARTBEATS
- /* Add Heartbeat extension */
- if ((limit - ret - 4 - 1) < 0)
- return NULL;
- s2n(TLSEXT_TYPE_heartbeat,ret);
- s2n(1,ret);
- /* Set mode:
- * 1: peer may send requests
- * 2: peer not allowed to send requests
- */
- if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
- *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
- else
- *(ret++) = SSL_TLSEXT_HB_ENABLED;
-#endif
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
- if (s->ctx->next_proto_select_cb && !s->s3->tmp.finish_md_len)
- {
- /* The client advertises an emtpy extension to indicate its
- * support for Next Protocol Negotiation */
- if (limit - ret - 4 < 0)
- return NULL;
- s2n(TLSEXT_TYPE_next_proto_neg,ret);
- s2n(0,ret);
- }
-#endif
-
- if (s->tlsext_channel_id_enabled)
- {
- /* The client advertises an emtpy extension to indicate its
- * support for Channel ID. */
- if (limit - ret - 4 < 0)
- return NULL;
- if (s->ctx->tlsext_channel_id_enabled_new)
- s2n(TLSEXT_TYPE_channel_id_new,ret);
- else
- s2n(TLSEXT_TYPE_channel_id,ret);
- s2n(0,ret);
- }
-
- if (s->alpn_client_proto_list && !s->s3->tmp.finish_md_len)
- {
- if ((size_t)(limit - ret) < 6 + s->alpn_client_proto_list_len)
- return NULL;
- s2n(TLSEXT_TYPE_application_layer_protocol_negotiation,ret);
- s2n(2 + s->alpn_client_proto_list_len,ret);
- s2n(s->alpn_client_proto_list_len,ret);
- memcpy(ret, s->alpn_client_proto_list,
- s->alpn_client_proto_list_len);
- ret += s->alpn_client_proto_list_len;
- }
-
-#ifndef OPENSSL_NO_SRTP
- if(SSL_IS_DTLS(s) && SSL_get_srtp_profiles(s))
- {
- int el;
-
- ssl_add_clienthello_use_srtp_ext(s, 0, &el, 0);
-
- if((limit - ret - 4 - el) < 0) return NULL;
-
- s2n(TLSEXT_TYPE_use_srtp,ret);
- s2n(el,ret);
-
- if(ssl_add_clienthello_use_srtp_ext(s, ret, &el, el))
- {
- SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
- ret += el;
- }
-#endif
- /* Add padding to workaround bugs in F5 terminators.
- * See https://tools.ietf.org/html/draft-agl-tls-padding-03
- *
- * NB: because this code works out the length of all existing
- * extensions it MUST always appear last.
- */
- if (s->options & SSL_OP_TLSEXT_PADDING)
- {
- int hlen = ret - (unsigned char *)s->init_buf->data;
- /* The code in s23_clnt.c to build ClientHello messages
- * includes the 5-byte record header in the buffer, while
- * the code in s3_clnt.c does not.
- */
- if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
- hlen -= 5;
- if (hlen > 0xff && hlen < 0x200)
- {
- hlen = 0x200 - hlen;
- if (hlen >= 4)
- hlen -= 4;
- else
- hlen = 0;
-
- s2n(TLSEXT_TYPE_padding, ret);
- s2n(hlen, ret);
- memset(ret, 0, hlen);
- ret += hlen;
- }
- }
-
- if ((extdatalen = ret-orig-2)== 0)
- return orig;
-
- s2n(extdatalen, orig);
- return ret;
- }
-
-unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *buf, unsigned char *limit)
- {
- int extdatalen=0;
- unsigned char *orig = buf;
- unsigned char *ret = buf;
-#ifndef OPENSSL_NO_NEXTPROTONEG
- int next_proto_neg_seen;
-#endif
-
- /* don't add extensions for SSLv3, unless doing secure renegotiation */
- if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
- return orig;
-
- ret+=2;
- if (ret>=limit) return NULL; /* this really never occurs, but ... */
-
- if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
- {
- if ((long)(limit - ret - 4) < 0) return NULL;
-
- s2n(TLSEXT_TYPE_server_name,ret);
- s2n(0,ret);
- }
-
- if(s->s3->send_connection_binding)
- {
- int el;
-
- if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
- {
- SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- if((limit - ret - 4 - el) < 0) return NULL;
-
- s2n(TLSEXT_TYPE_renegotiate,ret);
- s2n(el,ret);
-
- if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
- {
- SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- ret += el;
- }
-
-#ifndef OPENSSL_NO_EC
- if (s->tlsext_ecpointformatlist != NULL)
- {
- /* Add TLS extension ECPointFormats to the ServerHello message */
- long lenmax;
-
- if ((lenmax = limit - ret - 5) < 0) return NULL;
- if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
- if (s->tlsext_ecpointformatlist_length > 255)
- {
- SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
-
- s2n(TLSEXT_TYPE_ec_point_formats,ret);
- s2n(s->tlsext_ecpointformatlist_length + 1,ret);
- *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
- memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
- ret+=s->tlsext_ecpointformatlist_length;
-
- }
- /* Currently the server should not respond with a SupportedCurves extension */
-#endif /* OPENSSL_NO_EC */
-
- if (s->tlsext_ticket_expected
- && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
- {
- if ((long)(limit - ret - 4) < 0) return NULL;
- s2n(TLSEXT_TYPE_session_ticket,ret);
- s2n(0,ret);
- }
-
- if (s->tlsext_status_expected)
- {
- if ((long)(limit - ret - 4) < 0) return NULL;
- s2n(TLSEXT_TYPE_status_request,ret);
- s2n(0,ret);
- }
-
-#ifdef TLSEXT_TYPE_opaque_prf_input
- if (s->s3->server_opaque_prf_input != NULL &&
- s->version != DTLS1_VERSION)
- {
- size_t sol = s->s3->server_opaque_prf_input_len;
-
- if ((long)(limit - ret - 6 - sol) < 0)
- return NULL;
- if (sol > 0xFFFD) /* can't happen */
- return NULL;
-
- s2n(TLSEXT_TYPE_opaque_prf_input, ret);
- s2n(sol + 2, ret);
- s2n(sol, ret);
- memcpy(ret, s->s3->server_opaque_prf_input, sol);
- ret += sol;
- }
-#endif
-
-#ifndef OPENSSL_NO_SRTP
- if(SSL_IS_DTLS(s) && s->srtp_profile)
- {
- int el;
-
- ssl_add_serverhello_use_srtp_ext(s, 0, &el, 0);
-
- if((limit - ret - 4 - el) < 0) return NULL;
-
- s2n(TLSEXT_TYPE_use_srtp,ret);
- s2n(el,ret);
-
- if(ssl_add_serverhello_use_srtp_ext(s, ret, &el, el))
- {
- SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
- return NULL;
- }
- ret+=el;
- }
-#endif
-
- if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
- && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
- { const unsigned char cryptopro_ext[36] = {
- 0xfd, 0xe8, /*65000*/
- 0x00, 0x20, /*32 bytes length*/
- 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
- 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
- 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
- 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
- if (limit-ret<36) return NULL;
- memcpy(ret,cryptopro_ext,36);
- ret+=36;
-
- }
-
-#ifndef OPENSSL_NO_HEARTBEATS
- /* Add Heartbeat extension if we've received one */
- if (s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED)
- {
- if ((limit - ret - 4 - 1) < 0)
- return NULL;
- s2n(TLSEXT_TYPE_heartbeat,ret);
- s2n(1,ret);
- /* Set mode:
- * 1: peer may send requests
- * 2: peer not allowed to send requests
- */
- if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
- *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
- else
- *(ret++) = SSL_TLSEXT_HB_ENABLED;
-
- }
-#endif
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
- next_proto_neg_seen = s->s3->next_proto_neg_seen;
- s->s3->next_proto_neg_seen = 0;
- if (next_proto_neg_seen && s->ctx->next_protos_advertised_cb)
- {
- const unsigned char *npa;
- unsigned int npalen;
- int r;
-
- r = s->ctx->next_protos_advertised_cb(s, &npa, &npalen, s->ctx->next_protos_advertised_cb_arg);
- if (r == SSL_TLSEXT_ERR_OK)
- {
- if ((long)(limit - ret - 4 - npalen) < 0) return NULL;
- s2n(TLSEXT_TYPE_next_proto_neg,ret);
- s2n(npalen,ret);
- memcpy(ret, npa, npalen);
- ret += npalen;
- s->s3->next_proto_neg_seen = 1;
- }
- }
-#endif
-
- /* If the client advertised support for Channel ID, and we have it
- * enabled, then we want to echo it back. */
- if (s->s3->tlsext_channel_id_valid)
- {
- if (limit - ret - 4 < 0)
- return NULL;
- if (s->s3->tlsext_channel_id_new)
- s2n(TLSEXT_TYPE_channel_id_new,ret);
- else
- s2n(TLSEXT_TYPE_channel_id,ret);
- s2n(0,ret);
- }
-
- if (s->s3->alpn_selected)
- {
- const unsigned char *selected = s->s3->alpn_selected;
- unsigned len = s->s3->alpn_selected_len;
-
- if ((long)(limit - ret - 4 - 2 - 1 - len) < 0)
- return NULL;
- s2n(TLSEXT_TYPE_application_layer_protocol_negotiation,ret);
- s2n(3 + len,ret);
- s2n(1 + len,ret);
- *ret++ = len;
- memcpy(ret, selected, len);
- ret += len;
- }
-
- if ((extdatalen = ret-orig-2)== 0)
- return orig;
-
- s2n(extdatalen, orig);
- return ret;
- }
-
-#ifndef OPENSSL_NO_EC
-/* ssl_check_for_safari attempts to fingerprint Safari using OS X
- * SecureTransport using the TLS extension block in |d|, of length |n|.
- * Safari, since 10.6, sends exactly these extensions, in this order:
- * SNI,
- * elliptic_curves
- * ec_point_formats
- *
- * We wish to fingerprint Safari because they broke ECDHE-ECDSA support in 10.8,
- * but they advertise support. So enabling ECDHE-ECDSA ciphers breaks them.
- * Sadly we cannot differentiate 10.6, 10.7 and 10.8.4 (which work), from
- * 10.8..10.8.3 (which don't work).
- */
-static void ssl_check_for_safari(SSL *s, const unsigned char *data, const unsigned char *d, int n) {
- unsigned short type, size;
- static const unsigned char kSafariExtensionsBlock[] = {
- 0x00, 0x0a, /* elliptic_curves extension */
- 0x00, 0x08, /* 8 bytes */
- 0x00, 0x06, /* 6 bytes of curve ids */
- 0x00, 0x17, /* P-256 */
- 0x00, 0x18, /* P-384 */
- 0x00, 0x19, /* P-521 */
-
- 0x00, 0x0b, /* ec_point_formats */
- 0x00, 0x02, /* 2 bytes */
- 0x01, /* 1 point format */
- 0x00, /* uncompressed */
- };
-
- /* The following is only present in TLS 1.2 */
- static const unsigned char kSafariTLS12ExtensionsBlock[] = {
- 0x00, 0x0d, /* signature_algorithms */
- 0x00, 0x0c, /* 12 bytes */
- 0x00, 0x0a, /* 10 bytes */
- 0x05, 0x01, /* SHA-384/RSA */
- 0x04, 0x01, /* SHA-256/RSA */
- 0x02, 0x01, /* SHA-1/RSA */
- 0x04, 0x03, /* SHA-256/ECDSA */
- 0x02, 0x03, /* SHA-1/ECDSA */
- };
-
- if (data >= (d+n-2))
- return;
- data += 2;
-
- if (data > (d+n-4))
- return;
- n2s(data,type);
- n2s(data,size);
-
- if (type != TLSEXT_TYPE_server_name)
- return;
-
- if (data+size > d+n)
- return;
- data += size;
-
- if (TLS1_get_client_version(s) >= TLS1_2_VERSION)
- {
- const size_t len1 = sizeof(kSafariExtensionsBlock);
- const size_t len2 = sizeof(kSafariTLS12ExtensionsBlock);
-
- if (data + len1 + len2 != d+n)
- return;
- if (memcmp(data, kSafariExtensionsBlock, len1) != 0)
- return;
- if (memcmp(data + len1, kSafariTLS12ExtensionsBlock, len2) != 0)
- return;
- }
- else
- {
- const size_t len = sizeof(kSafariExtensionsBlock);
-
- if (data + len != d+n)
- return;
- if (memcmp(data, kSafariExtensionsBlock, len) != 0)
- return;
- }
-
- s->s3->is_probably_safari = 1;
-}
-#endif /* !OPENSSL_NO_EC */
-
-/* tls1_alpn_handle_client_hello is called to process the ALPN extension in a
- * ClientHello.
- * data: the contents of the extension, not including the type and length.
- * data_len: the number of bytes in |data|
- * al: a pointer to the alert value to send in the event of a non-zero
- * return.
- *
- * returns: 0 on success. */
-static int tls1_alpn_handle_client_hello(SSL *s, const unsigned char *data,
- unsigned data_len, int *al)
- {
- unsigned i;
- unsigned proto_len;
- const unsigned char *selected;
- unsigned char selected_len;
- int r;
-
- if (s->ctx->alpn_select_cb == NULL)
- return 0;
-
- if (data_len < 2)
- goto parse_error;
-
- /* data should contain a uint16 length followed by a series of 8-bit,
- * length-prefixed strings. */
- i = ((unsigned) data[0]) << 8 |
- ((unsigned) data[1]);
- data_len -= 2;
- data += 2;
- if (data_len != i)
- goto parse_error;
-
- if (data_len < 2)
- goto parse_error;
-
- for (i = 0; i < data_len;)
- {
- proto_len = data[i];
- i++;
-
- if (proto_len == 0)
- goto parse_error;
-
- if (i + proto_len < i || i + proto_len > data_len)
- goto parse_error;
-
- i += proto_len;
- }
-
- r = s->ctx->alpn_select_cb(s, &selected, &selected_len, data, data_len,
- s->ctx->alpn_select_cb_arg);
- if (r == SSL_TLSEXT_ERR_OK) {
- if (s->s3->alpn_selected)
- OPENSSL_free(s->s3->alpn_selected);
- s->s3->alpn_selected = OPENSSL_malloc(selected_len);
- if (!s->s3->alpn_selected)
- {
- *al = SSL_AD_INTERNAL_ERROR;
- return -1;
- }
- memcpy(s->s3->alpn_selected, selected, selected_len);
- s->s3->alpn_selected_len = selected_len;
- }
- return 0;
-
-parse_error:
- *al = SSL_AD_DECODE_ERROR;
- return -1;
- }
-
-int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
- {
- unsigned short type;
- unsigned short size;
- unsigned short len;
- unsigned char *data = *p;
- int renegotiate_seen = 0;
- int sigalg_seen = 0;
-
- s->servername_done = 0;
- s->tlsext_status_type = -1;
-
- /* Reset TLS 1.2 digest functions to defaults because they don't carry
- * over to a renegotiation. */
- s->s3->digest_rsa = NULL;
- s->s3->digest_dsa = NULL;
- s->s3->digest_ecdsa = NULL;
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
- s->s3->next_proto_neg_seen = 0;
-#endif
-
- if (s->s3->alpn_selected)
- {
- OPENSSL_free(s->s3->alpn_selected);
- s->s3->alpn_selected = NULL;
- }
-
-#ifndef OPENSSL_NO_HEARTBEATS
- s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
- SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
-#endif
-
-#ifndef OPENSSL_NO_EC
- if (s->options & SSL_OP_SAFARI_ECDHE_ECDSA_BUG)
- ssl_check_for_safari(s, data, d, n);
-#endif /* !OPENSSL_NO_EC */
-
- if (data >= (d+n-2))
- goto ri_check;
- n2s(data,len);
-
- if (data > (d+n-len))
- goto ri_check;
-
- while (data <= (d+n-4))
- {
- n2s(data,type);
- n2s(data,size);
-
- if (data+size > (d+n))
- goto ri_check;
-#if 0
- fprintf(stderr,"Received extension type %d size %d\n",type,size);
-#endif
- if (s->tlsext_debug_cb)
- s->tlsext_debug_cb(s, 0, type, data, size,
- s->tlsext_debug_arg);
-/* The servername extension is treated as follows:
-
- - Only the hostname type is supported with a maximum length of 255.
- - The servername is rejected if too long or if it contains zeros,
- in which case an fatal alert is generated.
- - The servername field is maintained together with the session cache.
- - When a session is resumed, the servername call back invoked in order
- to allow the application to position itself to the right context.
- - The servername is acknowledged if it is new for a session or when
- it is identical to a previously used for the same session.
- Applications can control the behaviour. They can at any time
- set a 'desirable' servername for a new SSL object. This can be the
- case for example with HTTPS when a Host: header field is received and
- a renegotiation is requested. In this case, a possible servername
- presented in the new client hello is only acknowledged if it matches
- the value of the Host: field.
- - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
- if they provide for changing an explicit servername context for the session,
- i.e. when the session has been established with a servername extension.
- - On session reconnect, the servername extension may be absent.
-
-*/
-
- if (type == TLSEXT_TYPE_server_name)
- {
- unsigned char *sdata;
- int servname_type;
- int dsize;
-
- if (size < 2)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- n2s(data,dsize);
- size -= 2;
- if (dsize > size )
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
-
- sdata = data;
- while (dsize > 3)
- {
- servname_type = *(sdata++);
- n2s(sdata,len);
- dsize -= 3;
-
- if (len > dsize)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- if (s->servername_done == 0)
- switch (servname_type)
- {
- case TLSEXT_NAMETYPE_host_name:
- if (!s->hit)
- {
- if(s->session->tlsext_hostname)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- if (len > TLSEXT_MAXLEN_host_name)
- {
- *al = TLS1_AD_UNRECOGNIZED_NAME;
- return 0;
- }
- if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- memcpy(s->session->tlsext_hostname, sdata, len);
- s->session->tlsext_hostname[len]='\0';
- if (strlen(s->session->tlsext_hostname) != len) {
- OPENSSL_free(s->session->tlsext_hostname);
- s->session->tlsext_hostname = NULL;
- *al = TLS1_AD_UNRECOGNIZED_NAME;
- return 0;
- }
- s->servername_done = 1;
-
- }
- else
- s->servername_done = s->session->tlsext_hostname
- && strlen(s->session->tlsext_hostname) == len
- && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
-
- break;
-
- default:
- break;
- }
-
- dsize -= len;
- }
- if (dsize != 0)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
-
- }
-#ifndef OPENSSL_NO_SRP
- else if (type == TLSEXT_TYPE_srp)
- {
- if (size <= 0 || ((len = data[0])) != (size -1))
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- if (s->srp_ctx.login != NULL)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
- return -1;
- memcpy(s->srp_ctx.login, &data[1], len);
- s->srp_ctx.login[len]='\0';
-
- if (strlen(s->srp_ctx.login) != len)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- }
-#endif
-
-#ifndef OPENSSL_NO_EC
- else if (type == TLSEXT_TYPE_ec_point_formats)
- {
- unsigned char *sdata = data;
- int ecpointformatlist_length = *(sdata++);
-
- if (ecpointformatlist_length != size - 1)
- {
- *al = TLS1_AD_DECODE_ERROR;
- return 0;
- }
- if (!s->hit)
- {
- if(s->session->tlsext_ecpointformatlist)
- {
- OPENSSL_free(s->session->tlsext_ecpointformatlist);
- s->session->tlsext_ecpointformatlist = NULL;
- }
- s->session->tlsext_ecpointformatlist_length = 0;
- if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
- memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
- }
-#if 0
- fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
- sdata = s->session->tlsext_ecpointformatlist;
- for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
- fprintf(stderr,"%i ",*(sdata++));
- fprintf(stderr,"\n");
-#endif
- }
- else if (type == TLSEXT_TYPE_elliptic_curves)
- {
- unsigned char *sdata = data;
- int ellipticcurvelist_length = (*(sdata++) << 8);
- ellipticcurvelist_length += (*(sdata++));
-
- if (ellipticcurvelist_length != size - 2 ||
- ellipticcurvelist_length < 1)
- {
- *al = TLS1_AD_DECODE_ERROR;
- return 0;
- }
- if (!s->hit)
- {
- if(s->session->tlsext_ellipticcurvelist)
- {
- *al = TLS1_AD_DECODE_ERROR;
- return 0;
- }
- s->session->tlsext_ellipticcurvelist_length = 0;
- if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
- memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
- }
-#if 0
- fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
- sdata = s->session->tlsext_ellipticcurvelist;
- for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
- fprintf(stderr,"%i ",*(sdata++));
- fprintf(stderr,"\n");
-#endif
- }
-#endif /* OPENSSL_NO_EC */
-#ifdef TLSEXT_TYPE_opaque_prf_input
- else if (type == TLSEXT_TYPE_opaque_prf_input &&
- s->version != DTLS1_VERSION)
- {
- unsigned char *sdata = data;
-
- if (size < 2)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- n2s(sdata, s->s3->client_opaque_prf_input_len);
- if (s->s3->client_opaque_prf_input_len != size - 2)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
-
- if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
- OPENSSL_free(s->s3->client_opaque_prf_input);
- if (s->s3->client_opaque_prf_input_len == 0)
- s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
- else
- s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
- if (s->s3->client_opaque_prf_input == NULL)
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- }
-#endif
- else if (type == TLSEXT_TYPE_session_ticket)
- {
- if (s->tls_session_ticket_ext_cb &&
- !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- }
- else if (type == TLSEXT_TYPE_renegotiate)
- {
- if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
- return 0;
- renegotiate_seen = 1;
- }
- else if (type == TLSEXT_TYPE_signature_algorithms)
- {
- int dsize;
- if (sigalg_seen || size < 2)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- sigalg_seen = 1;
- n2s(data,dsize);
- size -= 2;
- if (dsize != size || dsize & 1)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- tls1_process_sigalgs(s, data, dsize);
- }
- else if (type == TLSEXT_TYPE_status_request &&
- s->version != DTLS1_VERSION)
- {
-
- if (size < 5)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
-
- s->tlsext_status_type = *data++;
- size--;
- if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
- {
- const unsigned char *sdata;
- int dsize;
- /* Read in responder_id_list */
- n2s(data,dsize);
- size -= 2;
- if (dsize > size )
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- while (dsize > 0)
- {
- OCSP_RESPID *id;
- int idsize;
- if (dsize < 4)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- n2s(data, idsize);
- dsize -= 2 + idsize;
- size -= 2 + idsize;
- if (dsize < 0)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- sdata = data;
- data += idsize;
- id = d2i_OCSP_RESPID(NULL,
- &sdata, idsize);
- if (!id)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- if (data != sdata)
- {
- OCSP_RESPID_free(id);
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- if (!s->tlsext_ocsp_ids
- && !(s->tlsext_ocsp_ids =
- sk_OCSP_RESPID_new_null()))
- {
- OCSP_RESPID_free(id);
- *al = SSL_AD_INTERNAL_ERROR;
- return 0;
- }
- if (!sk_OCSP_RESPID_push(
- s->tlsext_ocsp_ids, id))
- {
- OCSP_RESPID_free(id);
- *al = SSL_AD_INTERNAL_ERROR;
- return 0;
- }
- }
-
- /* Read in request_extensions */
- if (size < 2)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- n2s(data,dsize);
- size -= 2;
- if (dsize != size)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- sdata = data;
- if (dsize > 0)
- {
- if (s->tlsext_ocsp_exts)
- {
- sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
- X509_EXTENSION_free);
- }
-
- s->tlsext_ocsp_exts =
- d2i_X509_EXTENSIONS(NULL,
- &sdata, dsize);
- if (!s->tlsext_ocsp_exts
- || (data + dsize != sdata))
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- }
- }
- /* We don't know what to do with any other type
- * so ignore it.
- */
- else
- s->tlsext_status_type = -1;
- }
-#ifndef OPENSSL_NO_HEARTBEATS
- else if (type == TLSEXT_TYPE_heartbeat)
- {
- switch(data[0])
- {
- case 0x01: /* Client allows us to send HB requests */
- s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
- break;
- case 0x02: /* Client doesn't accept HB requests */
- s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
- s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
- break;
- default: *al = SSL_AD_ILLEGAL_PARAMETER;
- return 0;
- }
- }
-#endif
-#ifndef OPENSSL_NO_NEXTPROTONEG
- else if (type == TLSEXT_TYPE_next_proto_neg &&
- s->s3->tmp.finish_md_len == 0 &&
- s->s3->alpn_selected == NULL)
- {
- /* We shouldn't accept this extension on a
- * renegotiation.
- *
- * s->new_session will be set on renegotiation, but we
- * probably shouldn't rely that it couldn't be set on
- * the initial renegotation too in certain cases (when
- * there's some other reason to disallow resuming an
- * earlier session -- the current code won't be doing
- * anything like that, but this might change).
-
- * A valid sign that there's been a previous handshake
- * in this connection is if s->s3->tmp.finish_md_len >
- * 0. (We are talking about a check that will happen
- * in the Hello protocol round, well before a new
- * Finished message could have been computed.) */
- s->s3->next_proto_neg_seen = 1;
- }
-#endif
-
- else if (type == TLSEXT_TYPE_channel_id && s->tlsext_channel_id_enabled)
- s->s3->tlsext_channel_id_valid = 1;
-
- else if (type == TLSEXT_TYPE_channel_id_new &&
- s->tlsext_channel_id_enabled)
- {
- s->s3->tlsext_channel_id_valid = 1;
- s->s3->tlsext_channel_id_new = 1;
- }
-
- else if (type == TLSEXT_TYPE_application_layer_protocol_negotiation &&
- s->ctx->alpn_select_cb &&
- s->s3->tmp.finish_md_len == 0)
- {
- if (tls1_alpn_handle_client_hello(s, data, size, al) != 0)
- return 0;
- /* ALPN takes precedence over NPN. */
- s->s3->next_proto_neg_seen = 0;
- }
-
- /* session ticket processed earlier */
-#ifndef OPENSSL_NO_SRTP
- else if (SSL_IS_DTLS(s) && SSL_get_srtp_profiles(s)
- && type == TLSEXT_TYPE_use_srtp)
- {
- if(ssl_parse_clienthello_use_srtp_ext(s, data, size,
- al))
- return 0;
- }
-#endif
-
- data+=size;
- }
-
- *p = data;
-
- ri_check:
-
- /* Need RI if renegotiating */
-
- if (!renegotiate_seen && s->renegotiate &&
- !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
- {
- *al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
- SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
- return 0;
- }
-
- return 1;
- }
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
-/* ssl_next_proto_validate validates a Next Protocol Negotiation block. No
- * elements of zero length are allowed and the set of elements must exactly fill
- * the length of the block. */
-static char ssl_next_proto_validate(unsigned char *d, unsigned len)
- {
- unsigned int off = 0;
-
- while (off < len)
- {
- if (d[off] == 0)
- return 0;
- off += d[off];
- off++;
- }
-
- return off == len;
- }
-#endif
-
-int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
- {
- unsigned short length;
- unsigned short type;
- unsigned short size;
- unsigned char *data = *p;
- int tlsext_servername = 0;
- int renegotiate_seen = 0;
-
-#ifndef OPENSSL_NO_NEXTPROTONEG
- s->s3->next_proto_neg_seen = 0;
-#endif
-
- if (s->s3->alpn_selected)
- {
- OPENSSL_free(s->s3->alpn_selected);
- s->s3->alpn_selected = NULL;
- }
-
-#ifndef OPENSSL_NO_HEARTBEATS
- s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
- SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
-#endif
-
- if (data >= (d+n-2))
- goto ri_check;
-
- n2s(data,length);
- if (data+length != d+n)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
-
- while(data <= (d+n-4))
- {
- n2s(data,type);
- n2s(data,size);
-
- if (data+size > (d+n))
- goto ri_check;
-
- if (s->tlsext_debug_cb)
- s->tlsext_debug_cb(s, 1, type, data, size,
- s->tlsext_debug_arg);
-
- if (type == TLSEXT_TYPE_server_name)
- {
- if (s->tlsext_hostname == NULL || size > 0)
- {
- *al = TLS1_AD_UNRECOGNIZED_NAME;
- return 0;
- }
- tlsext_servername = 1;
- }
-
-#ifndef OPENSSL_NO_EC
- else if (type == TLSEXT_TYPE_ec_point_formats)
- {
- unsigned char *sdata = data;
- int ecpointformatlist_length = *(sdata++);
-
- if (ecpointformatlist_length != size - 1 ||
- ecpointformatlist_length < 1)
- {
- *al = TLS1_AD_DECODE_ERROR;
- return 0;
- }
- if (!s->hit)
- {
- s->session->tlsext_ecpointformatlist_length = 0;
- if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
- if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
- memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
- }
-#if 0
- fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
- sdata = s->session->tlsext_ecpointformatlist;
- for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
- fprintf(stderr,"%i ",*(sdata++));
- fprintf(stderr,"\n");
-#endif
- }
-#endif /* OPENSSL_NO_EC */
-
- else if (type == TLSEXT_TYPE_session_ticket)
- {
- if (s->tls_session_ticket_ext_cb &&
- !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
- || (size > 0))
- {
- *al = TLS1_AD_UNSUPPORTED_EXTENSION;
- return 0;
- }
- s->tlsext_ticket_expected = 1;
- }
-#ifdef TLSEXT_TYPE_opaque_prf_input
- else if (type == TLSEXT_TYPE_opaque_prf_input &&
- s->version != DTLS1_VERSION)
- {
- unsigned char *sdata = data;
-
- if (size < 2)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- n2s(sdata, s->s3->server_opaque_prf_input_len);
- if (s->s3->server_opaque_prf_input_len != size - 2)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
-
- if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
- OPENSSL_free(s->s3->server_opaque_prf_input);
- if (s->s3->server_opaque_prf_input_len == 0)
- s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
- else
- s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
-
- if (s->s3->server_opaque_prf_input == NULL)
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- }
-#endif
- else if (type == TLSEXT_TYPE_status_request &&
- s->version != DTLS1_VERSION)
- {
- /* MUST be empty and only sent if we've requested
- * a status request message.
- */
- if ((s->tlsext_status_type == -1) || (size > 0))
- {
- *al = TLS1_AD_UNSUPPORTED_EXTENSION;
- return 0;
- }
- /* Set flag to expect CertificateStatus message */
- s->tlsext_status_expected = 1;
- }
-#ifndef OPENSSL_NO_NEXTPROTONEG
- else if (type == TLSEXT_TYPE_next_proto_neg &&
- s->s3->tmp.finish_md_len == 0)
- {
- unsigned char *selected;
- unsigned char selected_len;
-
- /* We must have requested it. */
- if (s->ctx->next_proto_select_cb == NULL)
- {
- *al = TLS1_AD_UNSUPPORTED_EXTENSION;
- return 0;
- }
- /* The data must be valid */
- if (!ssl_next_proto_validate(data, size))
- {
- *al = TLS1_AD_DECODE_ERROR;
- return 0;
- }
- if (s->ctx->next_proto_select_cb(s, &selected, &selected_len, data, size, s->ctx->next_proto_select_cb_arg) != SSL_TLSEXT_ERR_OK)
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- s->next_proto_negotiated = OPENSSL_malloc(selected_len);
- if (!s->next_proto_negotiated)
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- memcpy(s->next_proto_negotiated, selected, selected_len);
- s->next_proto_negotiated_len = selected_len;
- s->s3->next_proto_neg_seen = 1;
- }
-#endif
- else if (type == TLSEXT_TYPE_channel_id)
- s->s3->tlsext_channel_id_valid = 1;
-
- else if (type == TLSEXT_TYPE_channel_id_new)
- {
- s->s3->tlsext_channel_id_valid = 1;
- s->s3->tlsext_channel_id_new = 1;
- }
-
- else if (type == TLSEXT_TYPE_application_layer_protocol_negotiation)
- {
- unsigned len;
-
- /* We must have requested it. */
- if (s->alpn_client_proto_list == NULL)
- {
- *al = TLS1_AD_UNSUPPORTED_EXTENSION;
- return 0;
- }
- if (size < 4)
- {
- *al = TLS1_AD_DECODE_ERROR;
- return 0;
- }
- /* The extension data consists of:
- * uint16 list_length
- * uint8 proto_length;
- * uint8 proto[proto_length]; */
- len = data[0];
- len <<= 8;
- len |= data[1];
- if (len != (unsigned) size - 2)
- {
- *al = TLS1_AD_DECODE_ERROR;
- return 0;
- }
- len = data[2];
- if (len != (unsigned) size - 3)
- {
- *al = TLS1_AD_DECODE_ERROR;
- return 0;
- }
- if (s->s3->alpn_selected)
- OPENSSL_free(s->s3->alpn_selected);
- s->s3->alpn_selected = OPENSSL_malloc(len);
- if (!s->s3->alpn_selected)
- {
- *al = TLS1_AD_INTERNAL_ERROR;
- return 0;
- }
- memcpy(s->s3->alpn_selected, data + 3, len);
- s->s3->alpn_selected_len = len;
- }
-
- else if (type == TLSEXT_TYPE_renegotiate)
- {
- if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
- return 0;
- renegotiate_seen = 1;
- }
-#ifndef OPENSSL_NO_HEARTBEATS
- else if (type == TLSEXT_TYPE_heartbeat)
- {
- switch(data[0])
- {
- case 0x01: /* Server allows us to send HB requests */
- s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
- break;
- case 0x02: /* Server doesn't accept HB requests */
- s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
- s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
- break;
- default: *al = SSL_AD_ILLEGAL_PARAMETER;
- return 0;
- }
- }
-#endif
-#ifndef OPENSSL_NO_SRTP
- else if (SSL_IS_DTLS(s) && type == TLSEXT_TYPE_use_srtp)
- {
- if(ssl_parse_serverhello_use_srtp_ext(s, data, size,
- al))
- return 0;
- }
-#endif
-
- data+=size;
- }
-
- if (data != d+n)
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
-
- if (!s->hit && tlsext_servername == 1)
- {
- if (s->tlsext_hostname)
- {
- if (s->session->tlsext_hostname == NULL)
- {
- s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
- if (!s->session->tlsext_hostname)
- {
- *al = SSL_AD_UNRECOGNIZED_NAME;
- return 0;
- }
- }
- else
- {
- *al = SSL_AD_DECODE_ERROR;
- return 0;
- }
- }
- }
-
- *p = data;
-
- ri_check:
-
- /* Determine if we need to see RI. Strictly speaking if we want to
- * avoid an attack we should *always* see RI even on initial server
- * hello because the client doesn't see any renegotiation during an
- * attack. However this would mean we could not connect to any server
- * which doesn't support RI so for the immediate future tolerate RI
- * absence on initial connect only.
- */
- if (!renegotiate_seen
- && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
- && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
- {
- *al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
- SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
- return 0;
- }
-
- return 1;
- }
-
-
-int ssl_prepare_clienthello_tlsext(SSL *s)
- {
-#ifndef OPENSSL_NO_EC
- /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
- * and elliptic curves we support.
- */
- int using_ecc = 0;
- int i;
- unsigned char *j;
- unsigned long alg_k, alg_a;
- STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
-
- for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
- {
- SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
-
- alg_k = c->algorithm_mkey;
- alg_a = c->algorithm_auth;
- if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
- {
- using_ecc = 1;
- break;
- }
- }
- using_ecc = using_ecc && (s->version >= TLS1_VERSION);
- if (using_ecc)
- {
- if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
- if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
- {
- SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
- return -1;
- }
- s->tlsext_ecpointformatlist_length = 3;
- s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
- s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
- s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
-
- /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
- if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
- s->tlsext_ellipticcurvelist_length = sizeof(pref_list)/sizeof(pref_list[0]) * 2;
- if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
- {
- s->tlsext_ellipticcurvelist_length = 0;
- SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
- return -1;
- }
- for (i = 0, j = s->tlsext_ellipticcurvelist; (unsigned int)i <
- sizeof(pref_list)/sizeof(pref_list[0]); i++)
- {
- int id = tls1_ec_nid2curve_id(pref_list[i]);
- s2n(id,j);
- }
- }
-#endif /* OPENSSL_NO_EC */
-
-#ifdef TLSEXT_TYPE_opaque_prf_input
- {
- int r = 1;
-
- if (s->ctx->tlsext_opaque_prf_input_callback != 0)
- {
- r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
- if (!r)
- return -1;
- }
-
- if (s->tlsext_opaque_prf_input != NULL)
- {
- if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
- OPENSSL_free(s->s3->client_opaque_prf_input);
-
- if (s->tlsext_opaque_prf_input_len == 0)
- s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
- else
- s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
- if (s->s3->client_opaque_prf_input == NULL)
- {
- SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
- return -1;
- }
- s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
- }
-
- if (r == 2)
- /* at callback's request, insist on receiving an appropriate server opaque PRF input */
- s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
- }
-#endif
-
- return 1;
- }
-
-int ssl_prepare_serverhello_tlsext(SSL *s)
- {
-#ifndef OPENSSL_NO_EC
- /* If we are server and using an ECC cipher suite, send the point formats we support
- * if the client sent us an ECPointsFormat extension. Note that the server is not
- * supposed to send an EllipticCurves extension.
- */
-
- unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
- unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
- int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
- using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
-
- if (using_ecc)
- {
- if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
- if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
- {
- SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
- return -1;
- }
- s->tlsext_ecpointformatlist_length = 3;
- s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
- s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
- s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
- }
-#endif /* OPENSSL_NO_EC */
-
- return 1;
- }
-
-int ssl_check_clienthello_tlsext_early(SSL *s)
- {
- int ret=SSL_TLSEXT_ERR_NOACK;
- int al = SSL_AD_UNRECOGNIZED_NAME;
-
-#ifndef OPENSSL_NO_EC
- /* The handling of the ECPointFormats extension is done elsewhere, namely in
- * ssl3_choose_cipher in s3_lib.c.
- */
- /* The handling of the EllipticCurves extension is done elsewhere, namely in
- * ssl3_choose_cipher in s3_lib.c.
- */
-#endif
-
- if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
- ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
- else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
- ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
-
-#ifdef TLSEXT_TYPE_opaque_prf_input
- {
- /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
- * but we might be sending an alert in response to the client hello,
- * so this has to happen here in
- * ssl_check_clienthello_tlsext_early(). */
-
- int r = 1;
-
- if (s->ctx->tlsext_opaque_prf_input_callback != 0)
- {
- r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
- if (!r)
- {
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- al = SSL_AD_INTERNAL_ERROR;
- goto err;
- }
- }
-
- if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
- OPENSSL_free(s->s3->server_opaque_prf_input);
- s->s3->server_opaque_prf_input = NULL;
-
- if (s->tlsext_opaque_prf_input != NULL)
- {
- if (s->s3->client_opaque_prf_input != NULL &&
- s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
- {
- /* can only use this extension if we have a server opaque PRF input
- * of the same length as the client opaque PRF input! */
-
- if (s->tlsext_opaque_prf_input_len == 0)
- s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
- else
- s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
- if (s->s3->server_opaque_prf_input == NULL)
- {
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- al = SSL_AD_INTERNAL_ERROR;
- goto err;
- }
- s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
- }
- }
-
- if (r == 2 && s->s3->server_opaque_prf_input == NULL)
- {
- /* The callback wants to enforce use of the extension,
- * but we can't do that with the client opaque PRF input;
- * abort the handshake.
- */
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- al = SSL_AD_HANDSHAKE_FAILURE;
- }
- }
-
- err:
-#endif
- switch (ret)
- {
- case SSL_TLSEXT_ERR_ALERT_FATAL:
- ssl3_send_alert(s,SSL3_AL_FATAL,al);
- return -1;
-
- case SSL_TLSEXT_ERR_ALERT_WARNING:
- ssl3_send_alert(s,SSL3_AL_WARNING,al);
- return 1;
-
- case SSL_TLSEXT_ERR_NOACK:
- s->servername_done=0;
- default:
- return 1;
- }
- }
-
-int ssl_check_clienthello_tlsext_late(SSL *s)
- {
- int ret = SSL_TLSEXT_ERR_OK;
- int al;
-
- /* If status request then ask callback what to do.
- * Note: this must be called after servername callbacks in case
- * the certificate has changed, and must be called after the cipher
- * has been chosen because this may influence which certificate is sent
- */
- if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
- {
- int r;
- CERT_PKEY *certpkey;
- certpkey = ssl_get_server_send_pkey(s);
- /* If no certificate can't return certificate status */
- if (certpkey == NULL)
- {
- s->tlsext_status_expected = 0;
- return 1;
- }
- /* Set current certificate to one we will use so
- * SSL_get_certificate et al can pick it up.
- */
- s->cert->key = certpkey;
- r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
- switch (r)
- {
- /* We don't want to send a status request response */
- case SSL_TLSEXT_ERR_NOACK:
- s->tlsext_status_expected = 0;
- break;
- /* status request response should be sent */
- case SSL_TLSEXT_ERR_OK:
- if (s->tlsext_ocsp_resp)
- s->tlsext_status_expected = 1;
- else
- s->tlsext_status_expected = 0;
- break;
- /* something bad happened */
- case SSL_TLSEXT_ERR_ALERT_FATAL:
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- al = SSL_AD_INTERNAL_ERROR;
- goto err;
- }
- }
- else
- s->tlsext_status_expected = 0;
-
- err:
- switch (ret)
- {
- case SSL_TLSEXT_ERR_ALERT_FATAL:
- ssl3_send_alert(s,SSL3_AL_FATAL,al);
- return -1;
-
- case SSL_TLSEXT_ERR_ALERT_WARNING:
- ssl3_send_alert(s,SSL3_AL_WARNING,al);
- return 1;
-
- default:
- return 1;
- }
- }
-
-int ssl_check_serverhello_tlsext(SSL *s)
- {
- int ret=SSL_TLSEXT_ERR_NOACK;
- int al = SSL_AD_UNRECOGNIZED_NAME;
-
-#ifndef OPENSSL_NO_EC
- /* If we are client and using an elliptic curve cryptography cipher
- * suite, then if server returns an EC point formats lists extension
- * it must contain uncompressed.
- */
- unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
- unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
- if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
- (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
- ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
- {
- /* we are using an ECC cipher */
- size_t i;
- unsigned char *list;
- int found_uncompressed = 0;
- list = s->session->tlsext_ecpointformatlist;
- for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
- {
- if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
- {
- found_uncompressed = 1;
- break;
- }
- }
- if (!found_uncompressed)
- {
- SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
- return -1;
- }
- }
- ret = SSL_TLSEXT_ERR_OK;
-#endif /* OPENSSL_NO_EC */
-
- if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
- ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
- else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
- ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
-
-#ifdef TLSEXT_TYPE_opaque_prf_input
- if (s->s3->server_opaque_prf_input_len > 0)
- {
- /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
- * So first verify that we really have a value from the server too. */
-
- if (s->s3->server_opaque_prf_input == NULL)
- {
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- al = SSL_AD_HANDSHAKE_FAILURE;
- }
-
- /* Anytime the server *has* sent an opaque PRF input, we need to check
- * that we have a client opaque PRF input of the same size. */
- if (s->s3->client_opaque_prf_input == NULL ||
- s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
- {
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- al = SSL_AD_ILLEGAL_PARAMETER;
- }
- }
-#endif
-
- /* If we've requested certificate status and we wont get one
- * tell the callback
- */
- if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
- && s->ctx && s->ctx->tlsext_status_cb)
- {
- int r;
- /* Set resp to NULL, resplen to -1 so callback knows
- * there is no response.
- */
- if (s->tlsext_ocsp_resp)
- {
- OPENSSL_free(s->tlsext_ocsp_resp);
- s->tlsext_ocsp_resp = NULL;
- }
- s->tlsext_ocsp_resplen = -1;
- r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
- if (r == 0)
- {
- al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- }
- if (r < 0)
- {
- al = SSL_AD_INTERNAL_ERROR;
- ret = SSL_TLSEXT_ERR_ALERT_FATAL;
- }
- }
-
- switch (ret)
- {
- case SSL_TLSEXT_ERR_ALERT_FATAL:
- ssl3_send_alert(s,SSL3_AL_FATAL,al);
- return -1;
-
- case SSL_TLSEXT_ERR_ALERT_WARNING:
- ssl3_send_alert(s,SSL3_AL_WARNING,al);
- return 1;
-
- case SSL_TLSEXT_ERR_NOACK:
- s->servername_done=0;
- default:
- return 1;
- }
- }
-
-/* Since the server cache lookup is done early on in the processing of the
- * ClientHello, and other operations depend on the result, we need to handle
- * any TLS session ticket extension at the same time.
- *
- * session_id: points at the session ID in the ClientHello. This code will
- * read past the end of this in order to parse out the session ticket
- * extension, if any.
- * len: the length of the session ID.
- * limit: a pointer to the first byte after the ClientHello.
- * ret: (output) on return, if a ticket was decrypted, then this is set to
- * point to the resulting session.
- *
- * If s->tls_session_secret_cb is set then we are expecting a pre-shared key
- * ciphersuite, in which case we have no use for session tickets and one will
- * never be decrypted, nor will s->tlsext_ticket_expected be set to 1.
- *
- * Returns:
- * -1: fatal error, either from parsing or decrypting the ticket.
- * 0: no ticket was found (or was ignored, based on settings).
- * 1: a zero length extension was found, indicating that the client supports
- * session tickets but doesn't currently have one to offer.
- * 2: either s->tls_session_secret_cb was set, or a ticket was offered but
- * couldn't be decrypted because of a non-fatal error.
- * 3: a ticket was successfully decrypted and *ret was set.
- *
- * Side effects:
- * Sets s->tlsext_ticket_expected to 1 if the server will have to issue
- * a new session ticket to the client because the client indicated support
- * (and s->tls_session_secret_cb is NULL) but the client either doesn't have
- * a session ticket or we couldn't use the one it gave us, or if
- * s->ctx->tlsext_ticket_key_cb asked to renew the client's ticket.
- * Otherwise, s->tlsext_ticket_expected is set to 0.
- */
-int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
- const unsigned char *limit, SSL_SESSION **ret)
- {
- /* Point after session ID in client hello */
- const unsigned char *p = session_id + len;
- unsigned short i;
-
- *ret = NULL;
- s->tlsext_ticket_expected = 0;
-
- /* If tickets disabled behave as if no ticket present
- * to permit stateful resumption.
- */
- if (SSL_get_options(s) & SSL_OP_NO_TICKET)
- return 0;
- if ((s->version <= SSL3_VERSION) || !limit)
- return 0;
- if (p >= limit)
- return -1;
- /* Skip past DTLS cookie */
- if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
- {
- i = *(p++);
- p+= i;
- if (p >= limit)
- return -1;
- }
- /* Skip past cipher list */
- n2s(p, i);
- p+= i;
- if (p >= limit)
- return -1;
- /* Skip past compression algorithm list */
- i = *(p++);
- p += i;
- if (p > limit)
- return -1;
- /* Now at start of extensions */
- if ((p + 2) >= limit)
- return 0;
- n2s(p, i);
- while ((p + 4) <= limit)
- {
- unsigned short type, size;
- n2s(p, type);
- n2s(p, size);
- if (p + size > limit)
- return 0;
- if (type == TLSEXT_TYPE_session_ticket)
- {
- int r;
- if (size == 0)
- {
- /* The client will accept a ticket but doesn't
- * currently have one. */
- s->tlsext_ticket_expected = 1;
- return 1;
- }
- if (s->tls_session_secret_cb)
- {
- /* Indicate that the ticket couldn't be
- * decrypted rather than generating the session
- * from ticket now, trigger abbreviated
- * handshake based on external mechanism to
- * calculate the master secret later. */
- return 2;
- }
- r = tls_decrypt_ticket(s, p, size, session_id, len, ret);
- switch (r)
- {
- case 2: /* ticket couldn't be decrypted */
- s->tlsext_ticket_expected = 1;
- return 2;
- case 3: /* ticket was decrypted */
- return r;
- case 4: /* ticket decrypted but need to renew */
- s->tlsext_ticket_expected = 1;
- return 3;
- default: /* fatal error */
- return -1;
- }
- }
- p += size;
- }
- return 0;
- }
-
-/* tls_decrypt_ticket attempts to decrypt a session ticket.
- *
- * etick: points to the body of the session ticket extension.
- * eticklen: the length of the session tickets extenion.
- * sess_id: points at the session ID.
- * sesslen: the length of the session ID.
- * psess: (output) on return, if a ticket was decrypted, then this is set to
- * point to the resulting session.
- *
- * Returns:
- * -1: fatal error, either from parsing or decrypting the ticket.
- * 2: the ticket couldn't be decrypted.
- * 3: a ticket was successfully decrypted and *psess was set.
- * 4: same as 3, but the ticket needs to be renewed.
- */
-static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
- const unsigned char *sess_id, int sesslen,
- SSL_SESSION **psess)
- {
- SSL_SESSION *sess;
- unsigned char *sdec;
- const unsigned char *p;
- int slen, mlen, renew_ticket = 0;
- unsigned char tick_hmac[EVP_MAX_MD_SIZE];
- HMAC_CTX hctx;
- EVP_CIPHER_CTX ctx;
- SSL_CTX *tctx = s->initial_ctx;
- /* Need at least keyname + iv + some encrypted data */
- if (eticklen < 48)
- return 2;
- /* Initialize session ticket encryption and HMAC contexts */
- HMAC_CTX_init(&hctx);
- EVP_CIPHER_CTX_init(&ctx);
- if (tctx->tlsext_ticket_key_cb)
- {
- unsigned char *nctick = (unsigned char *)etick;
- int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
- &ctx, &hctx, 0);
- if (rv < 0)
- return -1;
- if (rv == 0)
- return 2;
- if (rv == 2)
- renew_ticket = 1;
- }
- else
- {
- /* Check key name matches */
- if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
- return 2;
- HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
- tlsext_tick_md(), NULL);
- EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
- tctx->tlsext_tick_aes_key, etick + 16);
- }
- /* Attempt to process session ticket, first conduct sanity and
- * integrity checks on ticket.
- */
- mlen = HMAC_size(&hctx);
- if (mlen < 0)
- {
- EVP_CIPHER_CTX_cleanup(&ctx);
- return -1;
- }
- eticklen -= mlen;
- /* Check HMAC of encrypted ticket */
- HMAC_Update(&hctx, etick, eticklen);
- HMAC_Final(&hctx, tick_hmac, NULL);
- HMAC_CTX_cleanup(&hctx);
- if (CRYPTO_memcmp(tick_hmac, etick + eticklen, mlen))
- {
- EVP_CIPHER_CTX_cleanup(&ctx);
- return 2;
- }
- /* Attempt to decrypt session data */
- /* Move p after IV to start of encrypted ticket, update length */
- p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
- eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
- sdec = OPENSSL_malloc(eticklen);
- if (!sdec)
- {
- EVP_CIPHER_CTX_cleanup(&ctx);
- return -1;
- }
- EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
- if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
- {
- EVP_CIPHER_CTX_cleanup(&ctx);
- OPENSSL_free(sdec);
- return 2;
- }
- slen += mlen;
- EVP_CIPHER_CTX_cleanup(&ctx);
- p = sdec;
-
- sess = d2i_SSL_SESSION(NULL, &p, slen);
- OPENSSL_free(sdec);
- if (sess)
- {
- /* The session ID, if non-empty, is used by some clients to
- * detect that the ticket has been accepted. So we copy it to
- * the session structure. If it is empty set length to zero
- * as required by standard.
- */
- if (sesslen)
- memcpy(sess->session_id, sess_id, sesslen);
- sess->session_id_length = sesslen;
- *psess = sess;
- if (renew_ticket)
- return 4;
- else
- return 3;
- }
- ERR_clear_error();
- /* For session parse failure, indicate that we need to send a new
- * ticket. */
- return 2;
- }
-
-/* Tables to translate from NIDs to TLS v1.2 ids */
-
-typedef struct
- {
- int nid;
- int id;
- } tls12_lookup;
-
-static tls12_lookup tls12_md[] = {
-#ifndef OPENSSL_NO_MD5
- {NID_md5, TLSEXT_hash_md5},
-#endif
-#ifndef OPENSSL_NO_SHA
- {NID_sha1, TLSEXT_hash_sha1},
-#endif
-#ifndef OPENSSL_NO_SHA256
- {NID_sha224, TLSEXT_hash_sha224},
- {NID_sha256, TLSEXT_hash_sha256},
-#endif
-#ifndef OPENSSL_NO_SHA512
- {NID_sha384, TLSEXT_hash_sha384},
- {NID_sha512, TLSEXT_hash_sha512}
-#endif
-};
-
-static tls12_lookup tls12_sig[] = {
-#ifndef OPENSSL_NO_RSA
- {EVP_PKEY_RSA, TLSEXT_signature_rsa},
-#endif
-#ifndef OPENSSL_NO_DSA
- {EVP_PKEY_DSA, TLSEXT_signature_dsa},
-#endif
-#ifndef OPENSSL_NO_ECDSA
- {EVP_PKEY_EC, TLSEXT_signature_ecdsa}
-#endif
-};
-
-static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen)
- {
- size_t i;
- for (i = 0; i < tlen; i++)
- {
- if (table[i].nid == nid)
- return table[i].id;
- }
- return -1;
- }
-
-int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md)
- {
- int sig_id, md_id;
- if (!md)
- return 0;
- md_id = tls12_find_id(EVP_MD_type(md), tls12_md,
- sizeof(tls12_md)/sizeof(tls12_lookup));
- if (md_id == -1)
- return 0;
- sig_id = tls12_get_sigid(pk);
- if (sig_id == -1)
- return 0;
- p[0] = (unsigned char)md_id;
- p[1] = (unsigned char)sig_id;
- return 1;
- }
-
-/* tls12_get_sigid returns the TLS 1.2 SignatureAlgorithm value corresponding
- * to the given public key, or -1 if not known. */
-int tls12_get_sigid(const EVP_PKEY *pk)
- {
- return tls12_find_id(pk->type, tls12_sig,
- sizeof(tls12_sig)/sizeof(tls12_lookup));
- }
-
-const EVP_MD *tls12_get_hash(unsigned char hash_alg)
- {
- switch(hash_alg)
- {
-#ifndef OPENSSL_NO_SHA
- case TLSEXT_hash_sha1:
- return EVP_sha1();
-#endif
-#ifndef OPENSSL_NO_SHA256
- case TLSEXT_hash_sha224:
- return EVP_sha224();
-
- case TLSEXT_hash_sha256:
- return EVP_sha256();
-#endif
-#ifndef OPENSSL_NO_SHA512
- case TLSEXT_hash_sha384:
- return EVP_sha384();
-
- case TLSEXT_hash_sha512:
- return EVP_sha512();
-#endif
- default:
- return NULL;
-
- }
- }
-
-/* tls1_process_sigalgs processes a signature_algorithms extension and sets the
- * digest functions accordingly for each key type.
- *
- * See RFC 5246, section 7.4.1.4.1.
- *
- * data: points to the content of the extension, not including type and length
- * headers.
- * dsize: the number of bytes of |data|. Must be even.
- */
-void tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
- {
- int i;
- const EVP_MD *md, **digest_ptr;
- /* Extension ignored for TLS versions below 1.2 */
- if (TLS1_get_version(s) < TLS1_2_VERSION)
- return;
-
- s->s3->digest_rsa = NULL;
- s->s3->digest_dsa = NULL;
- s->s3->digest_ecdsa = NULL;
-
- for (i = 0; i < dsize; i += 2)
- {
- unsigned char hash_alg = data[i], sig_alg = data[i+1];
-
- switch(sig_alg)
- {
-#ifndef OPENSSL_NO_RSA
- case TLSEXT_signature_rsa:
- digest_ptr = &s->s3->digest_rsa;
- break;
-#endif
-#ifndef OPENSSL_NO_DSA
- case TLSEXT_signature_dsa:
- digest_ptr = &s->s3->digest_dsa;
- break;
-#endif
-#ifndef OPENSSL_NO_ECDSA
- case TLSEXT_signature_ecdsa:
- digest_ptr = &s->s3->digest_ecdsa;
- break;
-#endif
- default:
- continue;
- }
-
- if (*digest_ptr == NULL)
- {
- md = tls12_get_hash(hash_alg);
- if (md)
- *digest_ptr = md;
- }
-
- }
- }
-
-#endif
-
-#ifndef OPENSSL_NO_HEARTBEATS
-int
-tls1_process_heartbeat(SSL *s)
- {
- unsigned char *p = &s->s3->rrec.data[0], *pl;
- unsigned short hbtype;
- unsigned int payload;
- unsigned int padding = 16; /* Use minimum padding */
-
- if (s->msg_callback)
- s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT,
- &s->s3->rrec.data[0], s->s3->rrec.length,
- s, s->msg_callback_arg);
-
- /* Read type and payload length first */
- if (1 + 2 + 16 > s->s3->rrec.length)
- return 0; /* silently discard */
- hbtype = *p++;
- n2s(p, payload);
- if (1 + 2 + payload + 16 > s->s3->rrec.length)
- return 0; /* silently discard per RFC 6520 sec. 4 */
- pl = p;
-
- if (hbtype == TLS1_HB_REQUEST)
- {
- unsigned char *buffer, *bp;
- int r;
-
- /* Allocate memory for the response, size is 1 bytes
- * message type, plus 2 bytes payload length, plus
- * payload, plus padding
- */
- buffer = OPENSSL_malloc(1 + 2 + payload + padding);
- bp = buffer;
-
- /* Enter response type, length and copy payload */
- *bp++ = TLS1_HB_RESPONSE;
- s2n(payload, bp);
- memcpy(bp, pl, payload);
- bp += payload;
- /* Random padding */
- RAND_pseudo_bytes(bp, padding);
-
- r = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buffer, 3 + payload + padding);
-
- if (r >= 0 && s->msg_callback)
- s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
- buffer, 3 + payload + padding,
- s, s->msg_callback_arg);
-
- OPENSSL_free(buffer);
-
- if (r < 0)
- return r;
- }
- else if (hbtype == TLS1_HB_RESPONSE)
- {
- unsigned int seq;
-
- /* We only send sequence numbers (2 bytes unsigned int),
- * and 16 random bytes, so we just try to read the
- * sequence number */
- n2s(pl, seq);
-
- if (payload == 18 && seq == s->tlsext_hb_seq)
- {
- s->tlsext_hb_seq++;
- s->tlsext_hb_pending = 0;
- }
- }
-
- return 0;
- }
-
-int
-tls1_heartbeat(SSL *s)
- {
- unsigned char *buf, *p;
- int ret;
- unsigned int payload = 18; /* Sequence number + random bytes */
- unsigned int padding = 16; /* Use minimum padding */
-
- /* Only send if peer supports and accepts HB requests... */
- if (!(s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) ||
- s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS)
- {
- SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT);
- return -1;
- }
-
- /* ...and there is none in flight yet... */
- if (s->tlsext_hb_pending)
- {
- SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PENDING);
- return -1;
- }
-
- /* ...and no handshake in progress. */
- if (SSL_in_init(s) || s->in_handshake)
- {
- SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_UNEXPECTED_MESSAGE);
- return -1;
- }
-
- /* Check if padding is too long, payload and padding
- * must not exceed 2^14 - 3 = 16381 bytes in total.
- */
- OPENSSL_assert(payload + padding <= 16381);
-
- /* Create HeartBeat message, we just use a sequence number
- * as payload to distuingish different messages and add
- * some random stuff.
- * - Message Type, 1 byte
- * - Payload Length, 2 bytes (unsigned int)
- * - Payload, the sequence number (2 bytes uint)
- * - Payload, random bytes (16 bytes uint)
- * - Padding
- */
- buf = OPENSSL_malloc(1 + 2 + payload + padding);
- p = buf;
- /* Message Type */
- *p++ = TLS1_HB_REQUEST;
- /* Payload length (18 bytes here) */
- s2n(payload, p);
- /* Sequence number */
- s2n(s->tlsext_hb_seq, p);
- /* 16 random bytes */
- RAND_pseudo_bytes(p, 16);
- p += 16;
- /* Random padding */
- RAND_pseudo_bytes(p, padding);
-
- ret = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buf, 3 + payload + padding);
- if (ret >= 0)
- {
- if (s->msg_callback)
- s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
- buf, 3 + payload + padding,
- s, s->msg_callback_arg);
-
- s->tlsext_hb_pending = 1;
- }
-
- OPENSSL_free(buf);
-
- return ret;
- }
-#endif
-
-#if !defined(OPENSSL_NO_TLSEXT)
-/* tls1_channel_id_hash calculates the signed data for a Channel ID on the given
- * SSL connection and writes it to |md|.
- */
-int
-tls1_channel_id_hash(EVP_MD_CTX *md, SSL *s)
- {
- EVP_MD_CTX ctx;
- unsigned char temp_digest[EVP_MAX_MD_SIZE];
- unsigned temp_digest_len;
- int i;
- static const char kClientIDMagic[] = "TLS Channel ID signature";
-
- if (s->s3->handshake_buffer)
- if (!ssl3_digest_cached_records(s))
- return 0;
-
- EVP_DigestUpdate(md, kClientIDMagic, sizeof(kClientIDMagic));
-
- if (s->hit && s->s3->tlsext_channel_id_new)
- {
- static const char kResumptionMagic[] = "Resumption";
- EVP_DigestUpdate(md, kResumptionMagic,
- sizeof(kResumptionMagic));
- if (s->session->original_handshake_hash_len == 0)
- return 0;
- EVP_DigestUpdate(md, s->session->original_handshake_hash,
- s->session->original_handshake_hash_len);
- }
-
- EVP_MD_CTX_init(&ctx);
- for (i = 0; i < SSL_MAX_DIGEST; i++)
- {
- if (s->s3->handshake_dgst[i] == NULL)
- continue;
- EVP_MD_CTX_copy_ex(&ctx, s->s3->handshake_dgst[i]);
- EVP_DigestFinal_ex(&ctx, temp_digest, &temp_digest_len);
- EVP_DigestUpdate(md, temp_digest, temp_digest_len);
- }
- EVP_MD_CTX_cleanup(&ctx);
-
- return 1;
- }
-#endif
-
-/* tls1_record_handshake_hashes_for_channel_id records the current handshake
- * hashes in |s->session| so that Channel ID resumptions can sign that data. */
-int tls1_record_handshake_hashes_for_channel_id(SSL *s)
- {
- int digest_len;
- /* This function should never be called for a resumed session because
- * the handshake hashes that we wish to record are for the original,
- * full handshake. */
- if (s->hit)
- return -1;
- /* It only makes sense to call this function if Channel IDs have been
- * negotiated. */
- if (!s->s3->tlsext_channel_id_new)
- return -1;
-
- digest_len = tls1_handshake_digest(
- s, s->session->original_handshake_hash,
- sizeof(s->session->original_handshake_hash));
- if (digest_len < 0)
- return -1;
-
- s->session->original_handshake_hash_len = digest_len;
-
- return 1;
- }
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