2404 lines
78 KiB
C
2404 lines
78 KiB
C
/*
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* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <limits.h>
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#include <string.h>
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#include <stdio.h>
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#include "../ssl_locl.h"
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#include "statem_locl.h"
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#include "internal/cryptlib.h"
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#include <openssl/buffer.h>
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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/*
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* Map error codes to TLS/SSL alart types.
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*/
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typedef struct x509err2alert_st {
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int x509err;
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int alert;
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} X509ERR2ALERT;
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/* Fixed value used in the ServerHello random field to identify an HRR */
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const unsigned char hrrrandom[] = {
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0xcf, 0x21, 0xad, 0x74, 0xe5, 0x9a, 0x61, 0x11, 0xbe, 0x1d, 0x8c, 0x02,
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0x1e, 0x65, 0xb8, 0x91, 0xc2, 0xa2, 0x11, 0x16, 0x7a, 0xbb, 0x8c, 0x5e,
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0x07, 0x9e, 0x09, 0xe2, 0xc8, 0xa8, 0x33, 0x9c
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};
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/*
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* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
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* SSL3_RT_CHANGE_CIPHER_SPEC)
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*/
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int ssl3_do_write(SSL *s, int type)
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{
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int ret;
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size_t written = 0;
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ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off],
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s->init_num, &written);
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if (ret < 0)
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return -1;
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if (type == SSL3_RT_HANDSHAKE)
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/*
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* should not be done for 'Hello Request's, but in that case we'll
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* ignore the result anyway
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* TLS1.3 KeyUpdate and NewSessionTicket do not need to be added
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*/
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if (!SSL_IS_TLS13(s) || (s->statem.hand_state != TLS_ST_SW_SESSION_TICKET
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&& s->statem.hand_state != TLS_ST_CW_KEY_UPDATE
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&& s->statem.hand_state != TLS_ST_SW_KEY_UPDATE))
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if (!ssl3_finish_mac(s,
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(unsigned char *)&s->init_buf->data[s->init_off],
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written))
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return -1;
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if (written == s->init_num) {
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if (s->msg_callback)
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s->msg_callback(1, s->version, type, s->init_buf->data,
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(size_t)(s->init_off + s->init_num), s,
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s->msg_callback_arg);
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return 1;
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}
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s->init_off += written;
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s->init_num -= written;
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return 0;
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}
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int tls_close_construct_packet(SSL *s, WPACKET *pkt, int htype)
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{
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size_t msglen;
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if ((htype != SSL3_MT_CHANGE_CIPHER_SPEC && !WPACKET_close(pkt))
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|| !WPACKET_get_length(pkt, &msglen)
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|| msglen > INT_MAX)
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return 0;
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s->init_num = (int)msglen;
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s->init_off = 0;
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return 1;
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}
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int tls_setup_handshake(SSL *s)
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{
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if (!ssl3_init_finished_mac(s)) {
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/* SSLfatal() already called */
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return 0;
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}
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/* Reset any extension flags */
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memset(s->ext.extflags, 0, sizeof(s->ext.extflags));
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if (s->server) {
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STACK_OF(SSL_CIPHER) *ciphers = SSL_get_ciphers(s);
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int i, ver_min, ver_max, ok = 0;
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/*
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* Sanity check that the maximum version we accept has ciphers
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* enabled. For clients we do this check during construction of the
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* ClientHello.
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*/
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if (ssl_get_min_max_version(s, &ver_min, &ver_max, NULL) != 0) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_SETUP_HANDSHAKE,
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ERR_R_INTERNAL_ERROR);
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return 0;
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}
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for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
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const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
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if (SSL_IS_DTLS(s)) {
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if (DTLS_VERSION_GE(ver_max, c->min_dtls) &&
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DTLS_VERSION_LE(ver_max, c->max_dtls))
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ok = 1;
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} else if (ver_max >= c->min_tls && ver_max <= c->max_tls) {
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ok = 1;
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}
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if (ok)
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break;
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}
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if (!ok) {
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SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_SETUP_HANDSHAKE,
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SSL_R_NO_CIPHERS_AVAILABLE);
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ERR_add_error_data(1, "No ciphers enabled for max supported "
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"SSL/TLS version");
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return 0;
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}
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if (SSL_IS_FIRST_HANDSHAKE(s)) {
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/* N.B. s->session_ctx == s->ctx here */
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tsan_counter(&s->session_ctx->stats.sess_accept);
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} else {
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/* N.B. s->ctx may not equal s->session_ctx */
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tsan_counter(&s->ctx->stats.sess_accept_renegotiate);
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s->s3->tmp.cert_request = 0;
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}
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} else {
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if (SSL_IS_FIRST_HANDSHAKE(s))
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tsan_counter(&s->session_ctx->stats.sess_connect);
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else
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tsan_counter(&s->session_ctx->stats.sess_connect_renegotiate);
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/* mark client_random uninitialized */
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memset(s->s3->client_random, 0, sizeof(s->s3->client_random));
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s->hit = 0;
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s->s3->tmp.cert_req = 0;
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if (SSL_IS_DTLS(s))
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s->statem.use_timer = 1;
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}
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return 1;
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}
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/*
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* Size of the to-be-signed TLS13 data, without the hash size itself:
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* 64 bytes of value 32, 33 context bytes, 1 byte separator
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*/
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#define TLS13_TBS_START_SIZE 64
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#define TLS13_TBS_PREAMBLE_SIZE (TLS13_TBS_START_SIZE + 33 + 1)
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static int get_cert_verify_tbs_data(SSL *s, unsigned char *tls13tbs,
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void **hdata, size_t *hdatalen)
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{
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static const char *servercontext = "TLS 1.3, server CertificateVerify";
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static const char *clientcontext = "TLS 1.3, client CertificateVerify";
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if (SSL_IS_TLS13(s)) {
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size_t hashlen;
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/* Set the first 64 bytes of to-be-signed data to octet 32 */
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memset(tls13tbs, 32, TLS13_TBS_START_SIZE);
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/* This copies the 33 bytes of context plus the 0 separator byte */
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if (s->statem.hand_state == TLS_ST_CR_CERT_VRFY
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|| s->statem.hand_state == TLS_ST_SW_CERT_VRFY)
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strcpy((char *)tls13tbs + TLS13_TBS_START_SIZE, servercontext);
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else
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strcpy((char *)tls13tbs + TLS13_TBS_START_SIZE, clientcontext);
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/*
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* If we're currently reading then we need to use the saved handshake
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* hash value. We can't use the current handshake hash state because
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* that includes the CertVerify itself.
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*/
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if (s->statem.hand_state == TLS_ST_CR_CERT_VRFY
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|| s->statem.hand_state == TLS_ST_SR_CERT_VRFY) {
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memcpy(tls13tbs + TLS13_TBS_PREAMBLE_SIZE, s->cert_verify_hash,
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s->cert_verify_hash_len);
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hashlen = s->cert_verify_hash_len;
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} else if (!ssl_handshake_hash(s, tls13tbs + TLS13_TBS_PREAMBLE_SIZE,
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EVP_MAX_MD_SIZE, &hashlen)) {
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/* SSLfatal() already called */
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return 0;
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}
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*hdata = tls13tbs;
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*hdatalen = TLS13_TBS_PREAMBLE_SIZE + hashlen;
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} else {
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size_t retlen;
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long retlen_l;
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retlen = retlen_l = BIO_get_mem_data(s->s3->handshake_buffer, hdata);
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if (retlen_l <= 0) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_GET_CERT_VERIFY_TBS_DATA,
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ERR_R_INTERNAL_ERROR);
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return 0;
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}
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*hdatalen = retlen;
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}
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return 1;
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}
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int tls_construct_cert_verify(SSL *s, WPACKET *pkt)
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{
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EVP_PKEY *pkey = NULL;
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const EVP_MD *md = NULL;
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EVP_MD_CTX *mctx = NULL;
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EVP_PKEY_CTX *pctx = NULL;
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size_t hdatalen = 0, siglen = 0;
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void *hdata;
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unsigned char *sig = NULL;
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unsigned char tls13tbs[TLS13_TBS_PREAMBLE_SIZE + EVP_MAX_MD_SIZE];
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const SIGALG_LOOKUP *lu = s->s3->tmp.sigalg;
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if (lu == NULL || s->s3->tmp.cert == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
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ERR_R_INTERNAL_ERROR);
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goto err;
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}
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pkey = s->s3->tmp.cert->privatekey;
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if (pkey == NULL || !tls1_lookup_md(lu, &md)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
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ERR_R_INTERNAL_ERROR);
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goto err;
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}
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mctx = EVP_MD_CTX_new();
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if (mctx == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
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ERR_R_MALLOC_FAILURE);
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goto err;
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}
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/* Get the data to be signed */
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if (!get_cert_verify_tbs_data(s, tls13tbs, &hdata, &hdatalen)) {
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/* SSLfatal() already called */
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goto err;
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}
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if (SSL_USE_SIGALGS(s) && !WPACKET_put_bytes_u16(pkt, lu->sigalg)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
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ERR_R_INTERNAL_ERROR);
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goto err;
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}
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siglen = EVP_PKEY_size(pkey);
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sig = OPENSSL_malloc(siglen);
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if (sig == NULL) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
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ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (EVP_DigestSignInit(mctx, &pctx, md, NULL, pkey) <= 0) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
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ERR_R_EVP_LIB);
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goto err;
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}
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if (lu->sig == EVP_PKEY_RSA_PSS) {
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if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0
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|| EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx,
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RSA_PSS_SALTLEN_DIGEST) <= 0) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
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ERR_R_EVP_LIB);
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goto err;
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}
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}
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if (s->version == SSL3_VERSION) {
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if (EVP_DigestSignUpdate(mctx, hdata, hdatalen) <= 0
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|| !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
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(int)s->session->master_key_length,
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s->session->master_key)
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|| EVP_DigestSignFinal(mctx, sig, &siglen) <= 0) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
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ERR_R_EVP_LIB);
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goto err;
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}
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} else if (EVP_DigestSign(mctx, sig, &siglen, hdata, hdatalen) <= 0) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
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ERR_R_EVP_LIB);
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goto err;
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}
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#ifndef OPENSSL_NO_GOST
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{
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int pktype = lu->sig;
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if (pktype == NID_id_GostR3410_2001
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|| pktype == NID_id_GostR3410_2012_256
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|| pktype == NID_id_GostR3410_2012_512)
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BUF_reverse(sig, NULL, siglen);
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}
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#endif
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if (!WPACKET_sub_memcpy_u16(pkt, sig, siglen)) {
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SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
|
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ERR_R_INTERNAL_ERROR);
|
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goto err;
|
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}
|
|
|
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/* Digest cached records and discard handshake buffer */
|
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if (!ssl3_digest_cached_records(s, 0)) {
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/* SSLfatal() already called */
|
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goto err;
|
|
}
|
|
|
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OPENSSL_free(sig);
|
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EVP_MD_CTX_free(mctx);
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return 1;
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err:
|
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OPENSSL_free(sig);
|
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EVP_MD_CTX_free(mctx);
|
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return 0;
|
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}
|
|
|
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MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt)
|
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{
|
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EVP_PKEY *pkey = NULL;
|
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const unsigned char *data;
|
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#ifndef OPENSSL_NO_GOST
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unsigned char *gost_data = NULL;
|
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#endif
|
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MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR;
|
|
int j;
|
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unsigned int len;
|
|
X509 *peer;
|
|
const EVP_MD *md = NULL;
|
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size_t hdatalen = 0;
|
|
void *hdata;
|
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unsigned char tls13tbs[TLS13_TBS_PREAMBLE_SIZE + EVP_MAX_MD_SIZE];
|
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EVP_MD_CTX *mctx = EVP_MD_CTX_new();
|
|
EVP_PKEY_CTX *pctx = NULL;
|
|
|
|
if (mctx == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
peer = s->session->peer;
|
|
pkey = X509_get0_pubkey(peer);
|
|
if (pkey == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if (ssl_cert_lookup_by_pkey(pkey, NULL) == NULL) {
|
|
SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
|
|
goto err;
|
|
}
|
|
|
|
if (SSL_USE_SIGALGS(s)) {
|
|
unsigned int sigalg;
|
|
|
|
if (!PACKET_get_net_2(pkt, &sigalg)) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
SSL_R_BAD_PACKET);
|
|
goto err;
|
|
}
|
|
if (tls12_check_peer_sigalg(s, sigalg, pkey) <= 0) {
|
|
/* SSLfatal() already called */
|
|
goto err;
|
|
}
|
|
} else if (!tls1_set_peer_legacy_sigalg(s, pkey)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
if (!tls1_lookup_md(s->s3->tmp.peer_sigalg, &md)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
ERR_R_INTERNAL_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
#ifdef SSL_DEBUG
|
|
if (SSL_USE_SIGALGS(s))
|
|
fprintf(stderr, "USING TLSv1.2 HASH %s\n",
|
|
md == NULL ? "n/a" : EVP_MD_name(md));
|
|
#endif
|
|
|
|
/* Check for broken implementations of GOST ciphersuites */
|
|
/*
|
|
* If key is GOST and len is exactly 64 or 128, it is signature without
|
|
* length field (CryptoPro implementations at least till TLS 1.2)
|
|
*/
|
|
#ifndef OPENSSL_NO_GOST
|
|
if (!SSL_USE_SIGALGS(s)
|
|
&& ((PACKET_remaining(pkt) == 64
|
|
&& (EVP_PKEY_id(pkey) == NID_id_GostR3410_2001
|
|
|| EVP_PKEY_id(pkey) == NID_id_GostR3410_2012_256))
|
|
|| (PACKET_remaining(pkt) == 128
|
|
&& EVP_PKEY_id(pkey) == NID_id_GostR3410_2012_512))) {
|
|
len = PACKET_remaining(pkt);
|
|
} else
|
|
#endif
|
|
if (!PACKET_get_net_2(pkt, &len)) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
SSL_R_LENGTH_MISMATCH);
|
|
goto err;
|
|
}
|
|
|
|
j = EVP_PKEY_size(pkey);
|
|
if (((int)len > j) || ((int)PACKET_remaining(pkt) > j)
|
|
|| (PACKET_remaining(pkt) == 0)) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
SSL_R_WRONG_SIGNATURE_SIZE);
|
|
goto err;
|
|
}
|
|
if (!PACKET_get_bytes(pkt, &data, len)) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
SSL_R_LENGTH_MISMATCH);
|
|
goto err;
|
|
}
|
|
|
|
if (!get_cert_verify_tbs_data(s, tls13tbs, &hdata, &hdatalen)) {
|
|
/* SSLfatal() already called */
|
|
goto err;
|
|
}
|
|
|
|
#ifdef SSL_DEBUG
|
|
fprintf(stderr, "Using client verify alg %s\n",
|
|
md == NULL ? "n/a" : EVP_MD_name(md));
|
|
#endif
|
|
if (EVP_DigestVerifyInit(mctx, &pctx, md, NULL, pkey) <= 0) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
ERR_R_EVP_LIB);
|
|
goto err;
|
|
}
|
|
#ifndef OPENSSL_NO_GOST
|
|
{
|
|
int pktype = EVP_PKEY_id(pkey);
|
|
if (pktype == NID_id_GostR3410_2001
|
|
|| pktype == NID_id_GostR3410_2012_256
|
|
|| pktype == NID_id_GostR3410_2012_512) {
|
|
if ((gost_data = OPENSSL_malloc(len)) == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
|
|
SSL_F_TLS_PROCESS_CERT_VERIFY, ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
BUF_reverse(gost_data, data, len);
|
|
data = gost_data;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (SSL_USE_PSS(s)) {
|
|
if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0
|
|
|| EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx,
|
|
RSA_PSS_SALTLEN_DIGEST) <= 0) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
ERR_R_EVP_LIB);
|
|
goto err;
|
|
}
|
|
}
|
|
if (s->version == SSL3_VERSION) {
|
|
if (EVP_DigestVerifyUpdate(mctx, hdata, hdatalen) <= 0
|
|
|| !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
|
|
(int)s->session->master_key_length,
|
|
s->session->master_key)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
ERR_R_EVP_LIB);
|
|
goto err;
|
|
}
|
|
if (EVP_DigestVerifyFinal(mctx, data, len) <= 0) {
|
|
SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
SSL_R_BAD_SIGNATURE);
|
|
goto err;
|
|
}
|
|
} else {
|
|
j = EVP_DigestVerify(mctx, data, len, hdata, hdatalen);
|
|
if (j <= 0) {
|
|
SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_CERT_VERIFY,
|
|
SSL_R_BAD_SIGNATURE);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* In TLSv1.3 on the client side we make sure we prepare the client
|
|
* certificate after the CertVerify instead of when we get the
|
|
* CertificateRequest. This is because in TLSv1.3 the CertificateRequest
|
|
* comes *before* the Certificate message. In TLSv1.2 it comes after. We
|
|
* want to make sure that SSL_get_peer_certificate() will return the actual
|
|
* server certificate from the client_cert_cb callback.
|
|
*/
|
|
if (!s->server && SSL_IS_TLS13(s) && s->s3->tmp.cert_req == 1)
|
|
ret = MSG_PROCESS_CONTINUE_PROCESSING;
|
|
else
|
|
ret = MSG_PROCESS_CONTINUE_READING;
|
|
err:
|
|
BIO_free(s->s3->handshake_buffer);
|
|
s->s3->handshake_buffer = NULL;
|
|
EVP_MD_CTX_free(mctx);
|
|
#ifndef OPENSSL_NO_GOST
|
|
OPENSSL_free(gost_data);
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
int tls_construct_finished(SSL *s, WPACKET *pkt)
|
|
{
|
|
size_t finish_md_len;
|
|
const char *sender;
|
|
size_t slen;
|
|
|
|
/* This is a real handshake so make sure we clean it up at the end */
|
|
if (!s->server && s->post_handshake_auth != SSL_PHA_REQUESTED)
|
|
s->statem.cleanuphand = 1;
|
|
|
|
/*
|
|
* We only change the keys if we didn't already do this when we sent the
|
|
* client certificate
|
|
*/
|
|
if (SSL_IS_TLS13(s)
|
|
&& !s->server
|
|
&& s->s3->tmp.cert_req == 0
|
|
&& (!s->method->ssl3_enc->change_cipher_state(s,
|
|
SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE))) {;
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
if (s->server) {
|
|
sender = s->method->ssl3_enc->server_finished_label;
|
|
slen = s->method->ssl3_enc->server_finished_label_len;
|
|
} else {
|
|
sender = s->method->ssl3_enc->client_finished_label;
|
|
slen = s->method->ssl3_enc->client_finished_label_len;
|
|
}
|
|
|
|
finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
|
|
sender, slen,
|
|
s->s3->tmp.finish_md);
|
|
if (finish_md_len == 0) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
s->s3->tmp.finish_md_len = finish_md_len;
|
|
|
|
if (!WPACKET_memcpy(pkt, s->s3->tmp.finish_md, finish_md_len)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_FINISHED,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Log the master secret, if logging is enabled. We don't log it for
|
|
* TLSv1.3: there's a different key schedule for that.
|
|
*/
|
|
if (!SSL_IS_TLS13(s) && !ssl_log_secret(s, MASTER_SECRET_LABEL,
|
|
s->session->master_key,
|
|
s->session->master_key_length)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Copy the finished so we can use it for renegotiation checks
|
|
*/
|
|
if (!ossl_assert(finish_md_len <= EVP_MAX_MD_SIZE)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_FINISHED,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
if (!s->server) {
|
|
memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md,
|
|
finish_md_len);
|
|
s->s3->previous_client_finished_len = finish_md_len;
|
|
} else {
|
|
memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md,
|
|
finish_md_len);
|
|
s->s3->previous_server_finished_len = finish_md_len;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int tls_construct_key_update(SSL *s, WPACKET *pkt)
|
|
{
|
|
if (!WPACKET_put_bytes_u8(pkt, s->key_update)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_KEY_UPDATE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
s->key_update = SSL_KEY_UPDATE_NONE;
|
|
return 1;
|
|
}
|
|
|
|
MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt)
|
|
{
|
|
unsigned int updatetype;
|
|
|
|
/*
|
|
* A KeyUpdate message signals a key change so the end of the message must
|
|
* be on a record boundary.
|
|
*/
|
|
if (RECORD_LAYER_processed_read_pending(&s->rlayer)) {
|
|
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_TLS_PROCESS_KEY_UPDATE,
|
|
SSL_R_NOT_ON_RECORD_BOUNDARY);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
|
|
if (!PACKET_get_1(pkt, &updatetype)
|
|
|| PACKET_remaining(pkt) != 0) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_KEY_UPDATE,
|
|
SSL_R_BAD_KEY_UPDATE);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
|
|
/*
|
|
* There are only two defined key update types. Fail if we get a value we
|
|
* didn't recognise.
|
|
*/
|
|
if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
|
|
&& updatetype != SSL_KEY_UPDATE_REQUESTED) {
|
|
SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_KEY_UPDATE,
|
|
SSL_R_BAD_KEY_UPDATE);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
|
|
/*
|
|
* If we get a request for us to update our sending keys too then, we need
|
|
* to additionally send a KeyUpdate message. However that message should
|
|
* not also request an update (otherwise we get into an infinite loop). We
|
|
* ignore a request for us to update our sending keys too if we already
|
|
* sent close_notify.
|
|
*/
|
|
if (updatetype == SSL_KEY_UPDATE_REQUESTED
|
|
&& (s->shutdown & SSL_SENT_SHUTDOWN) == 0)
|
|
s->key_update = SSL_KEY_UPDATE_NOT_REQUESTED;
|
|
|
|
if (!tls13_update_key(s, 0)) {
|
|
/* SSLfatal() already called */
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
|
|
return MSG_PROCESS_FINISHED_READING;
|
|
}
|
|
|
|
/*
|
|
* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen
|
|
* to far.
|
|
*/
|
|
int ssl3_take_mac(SSL *s)
|
|
{
|
|
const char *sender;
|
|
size_t slen;
|
|
|
|
if (!s->server) {
|
|
sender = s->method->ssl3_enc->server_finished_label;
|
|
slen = s->method->ssl3_enc->server_finished_label_len;
|
|
} else {
|
|
sender = s->method->ssl3_enc->client_finished_label;
|
|
slen = s->method->ssl3_enc->client_finished_label_len;
|
|
}
|
|
|
|
s->s3->tmp.peer_finish_md_len =
|
|
s->method->ssl3_enc->final_finish_mac(s, sender, slen,
|
|
s->s3->tmp.peer_finish_md);
|
|
|
|
if (s->s3->tmp.peer_finish_md_len == 0) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt)
|
|
{
|
|
size_t remain;
|
|
|
|
remain = PACKET_remaining(pkt);
|
|
/*
|
|
* 'Change Cipher Spec' is just a single byte, which should already have
|
|
* been consumed by ssl_get_message() so there should be no bytes left,
|
|
* unless we're using DTLS1_BAD_VER, which has an extra 2 bytes
|
|
*/
|
|
if (SSL_IS_DTLS(s)) {
|
|
if ((s->version == DTLS1_BAD_VER
|
|
&& remain != DTLS1_CCS_HEADER_LENGTH + 1)
|
|
|| (s->version != DTLS1_BAD_VER
|
|
&& remain != DTLS1_CCS_HEADER_LENGTH - 1)) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR,
|
|
SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
|
|
SSL_R_BAD_CHANGE_CIPHER_SPEC);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
} else {
|
|
if (remain != 0) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR,
|
|
SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
|
|
SSL_R_BAD_CHANGE_CIPHER_SPEC);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
}
|
|
|
|
/* Check we have a cipher to change to */
|
|
if (s->s3->tmp.new_cipher == NULL) {
|
|
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE,
|
|
SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, SSL_R_CCS_RECEIVED_EARLY);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
|
|
s->s3->change_cipher_spec = 1;
|
|
if (!ssl3_do_change_cipher_spec(s)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
|
|
if (SSL_IS_DTLS(s)) {
|
|
dtls1_reset_seq_numbers(s, SSL3_CC_READ);
|
|
|
|
if (s->version == DTLS1_BAD_VER)
|
|
s->d1->handshake_read_seq++;
|
|
|
|
#ifndef OPENSSL_NO_SCTP
|
|
/*
|
|
* Remember that a CCS has been received, so that an old key of
|
|
* SCTP-Auth can be deleted when a CCS is sent. Will be ignored if no
|
|
* SCTP is used
|
|
*/
|
|
BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD, 1, NULL);
|
|
#endif
|
|
}
|
|
|
|
return MSG_PROCESS_CONTINUE_READING;
|
|
}
|
|
|
|
MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt)
|
|
{
|
|
size_t md_len;
|
|
|
|
|
|
/* This is a real handshake so make sure we clean it up at the end */
|
|
if (s->server) {
|
|
/*
|
|
* To get this far we must have read encrypted data from the client. We
|
|
* no longer tolerate unencrypted alerts. This value is ignored if less
|
|
* than TLSv1.3
|
|
*/
|
|
s->statem.enc_read_state = ENC_READ_STATE_VALID;
|
|
if (s->post_handshake_auth != SSL_PHA_REQUESTED)
|
|
s->statem.cleanuphand = 1;
|
|
if (SSL_IS_TLS13(s) && !tls13_save_handshake_digest_for_pha(s)) {
|
|
/* SSLfatal() already called */
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* In TLSv1.3 a Finished message signals a key change so the end of the
|
|
* message must be on a record boundary.
|
|
*/
|
|
if (SSL_IS_TLS13(s) && RECORD_LAYER_processed_read_pending(&s->rlayer)) {
|
|
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_TLS_PROCESS_FINISHED,
|
|
SSL_R_NOT_ON_RECORD_BOUNDARY);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
|
|
/* If this occurs, we have missed a message */
|
|
if (!SSL_IS_TLS13(s) && !s->s3->change_cipher_spec) {
|
|
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_TLS_PROCESS_FINISHED,
|
|
SSL_R_GOT_A_FIN_BEFORE_A_CCS);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
s->s3->change_cipher_spec = 0;
|
|
|
|
md_len = s->s3->tmp.peer_finish_md_len;
|
|
|
|
if (md_len != PACKET_remaining(pkt)) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_FINISHED,
|
|
SSL_R_BAD_DIGEST_LENGTH);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
|
|
if (CRYPTO_memcmp(PACKET_data(pkt), s->s3->tmp.peer_finish_md,
|
|
md_len) != 0) {
|
|
SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_FINISHED,
|
|
SSL_R_DIGEST_CHECK_FAILED);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
|
|
/*
|
|
* Copy the finished so we can use it for renegotiation checks
|
|
*/
|
|
if (!ossl_assert(md_len <= EVP_MAX_MD_SIZE)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_FINISHED,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
if (s->server) {
|
|
memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md,
|
|
md_len);
|
|
s->s3->previous_client_finished_len = md_len;
|
|
} else {
|
|
memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md,
|
|
md_len);
|
|
s->s3->previous_server_finished_len = md_len;
|
|
}
|
|
|
|
/*
|
|
* In TLS1.3 we also have to change cipher state and do any final processing
|
|
* of the initial server flight (if we are a client)
|
|
*/
|
|
if (SSL_IS_TLS13(s)) {
|
|
if (s->server) {
|
|
if (s->post_handshake_auth != SSL_PHA_REQUESTED &&
|
|
!s->method->ssl3_enc->change_cipher_state(s,
|
|
SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_SERVER_READ)) {
|
|
/* SSLfatal() already called */
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
} else {
|
|
if (!s->method->ssl3_enc->generate_master_secret(s,
|
|
s->master_secret, s->handshake_secret, 0,
|
|
&s->session->master_key_length)) {
|
|
/* SSLfatal() already called */
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
if (!s->method->ssl3_enc->change_cipher_state(s,
|
|
SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_READ)) {
|
|
/* SSLfatal() already called */
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
if (!tls_process_initial_server_flight(s)) {
|
|
/* SSLfatal() already called */
|
|
return MSG_PROCESS_ERROR;
|
|
}
|
|
}
|
|
}
|
|
|
|
return MSG_PROCESS_FINISHED_READING;
|
|
}
|
|
|
|
int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt)
|
|
{
|
|
if (!WPACKET_put_bytes_u8(pkt, SSL3_MT_CCS)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
|
|
SSL_F_TLS_CONSTRUCT_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Add a certificate to the WPACKET */
|
|
static int ssl_add_cert_to_wpacket(SSL *s, WPACKET *pkt, X509 *x, int chain)
|
|
{
|
|
int len;
|
|
unsigned char *outbytes;
|
|
|
|
len = i2d_X509(x, NULL);
|
|
if (len < 0) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_ADD_CERT_TO_WPACKET,
|
|
ERR_R_BUF_LIB);
|
|
return 0;
|
|
}
|
|
if (!WPACKET_sub_allocate_bytes_u24(pkt, len, &outbytes)
|
|
|| i2d_X509(x, &outbytes) != len) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_ADD_CERT_TO_WPACKET,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
if (SSL_IS_TLS13(s)
|
|
&& !tls_construct_extensions(s, pkt, SSL_EXT_TLS1_3_CERTIFICATE, x,
|
|
chain)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Add certificate chain to provided WPACKET */
|
|
static int ssl_add_cert_chain(SSL *s, WPACKET *pkt, CERT_PKEY *cpk)
|
|
{
|
|
int i, chain_count;
|
|
X509 *x;
|
|
STACK_OF(X509) *extra_certs;
|
|
STACK_OF(X509) *chain = NULL;
|
|
X509_STORE *chain_store;
|
|
|
|
if (cpk == NULL || cpk->x509 == NULL)
|
|
return 1;
|
|
|
|
x = cpk->x509;
|
|
|
|
/*
|
|
* If we have a certificate specific chain use it, else use parent ctx.
|
|
*/
|
|
if (cpk->chain != NULL)
|
|
extra_certs = cpk->chain;
|
|
else
|
|
extra_certs = s->ctx->extra_certs;
|
|
|
|
if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
|
|
chain_store = NULL;
|
|
else if (s->cert->chain_store)
|
|
chain_store = s->cert->chain_store;
|
|
else
|
|
chain_store = s->ctx->cert_store;
|
|
|
|
if (chain_store != NULL) {
|
|
X509_STORE_CTX *xs_ctx = X509_STORE_CTX_new();
|
|
|
|
if (xs_ctx == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_ADD_CERT_CHAIN,
|
|
ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
if (!X509_STORE_CTX_init(xs_ctx, chain_store, x, NULL)) {
|
|
X509_STORE_CTX_free(xs_ctx);
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_ADD_CERT_CHAIN,
|
|
ERR_R_X509_LIB);
|
|
return 0;
|
|
}
|
|
/*
|
|
* It is valid for the chain not to be complete (because normally we
|
|
* don't include the root cert in the chain). Therefore we deliberately
|
|
* ignore the error return from this call. We're not actually verifying
|
|
* the cert - we're just building as much of the chain as we can
|
|
*/
|
|
(void)X509_verify_cert(xs_ctx);
|
|
/* Don't leave errors in the queue */
|
|
ERR_clear_error();
|
|
chain = X509_STORE_CTX_get0_chain(xs_ctx);
|
|
i = ssl_security_cert_chain(s, chain, NULL, 0);
|
|
if (i != 1) {
|
|
#if 0
|
|
/* Dummy error calls so mkerr generates them */
|
|
SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_EE_KEY_TOO_SMALL);
|
|
SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_CA_KEY_TOO_SMALL);
|
|
SSLerr(SSL_F_SSL_ADD_CERT_CHAIN, SSL_R_CA_MD_TOO_WEAK);
|
|
#endif
|
|
X509_STORE_CTX_free(xs_ctx);
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_ADD_CERT_CHAIN, i);
|
|
return 0;
|
|
}
|
|
chain_count = sk_X509_num(chain);
|
|
for (i = 0; i < chain_count; i++) {
|
|
x = sk_X509_value(chain, i);
|
|
|
|
if (!ssl_add_cert_to_wpacket(s, pkt, x, i)) {
|
|
/* SSLfatal() already called */
|
|
X509_STORE_CTX_free(xs_ctx);
|
|
return 0;
|
|
}
|
|
}
|
|
X509_STORE_CTX_free(xs_ctx);
|
|
} else {
|
|
i = ssl_security_cert_chain(s, extra_certs, x, 0);
|
|
if (i != 1) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_ADD_CERT_CHAIN, i);
|
|
return 0;
|
|
}
|
|
if (!ssl_add_cert_to_wpacket(s, pkt, x, 0)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
for (i = 0; i < sk_X509_num(extra_certs); i++) {
|
|
x = sk_X509_value(extra_certs, i);
|
|
if (!ssl_add_cert_to_wpacket(s, pkt, x, i + 1)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
unsigned long ssl3_output_cert_chain(SSL *s, WPACKET *pkt, CERT_PKEY *cpk)
|
|
{
|
|
if (!WPACKET_start_sub_packet_u24(pkt)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_OUTPUT_CERT_CHAIN,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
if (!ssl_add_cert_chain(s, pkt, cpk))
|
|
return 0;
|
|
|
|
if (!WPACKET_close(pkt)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_OUTPUT_CERT_CHAIN,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Tidy up after the end of a handshake. In the case of SCTP this may result
|
|
* in NBIO events. If |clearbufs| is set then init_buf and the wbio buffer is
|
|
* freed up as well.
|
|
*/
|
|
WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs, int stop)
|
|
{
|
|
void (*cb) (const SSL *ssl, int type, int val) = NULL;
|
|
int cleanuphand = s->statem.cleanuphand;
|
|
|
|
if (clearbufs) {
|
|
if (!SSL_IS_DTLS(s)) {
|
|
/*
|
|
* We don't do this in DTLS because we may still need the init_buf
|
|
* in case there are any unexpected retransmits
|
|
*/
|
|
BUF_MEM_free(s->init_buf);
|
|
s->init_buf = NULL;
|
|
}
|
|
if (!ssl_free_wbio_buffer(s)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_FINISH_HANDSHAKE,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return WORK_ERROR;
|
|
}
|
|
s->init_num = 0;
|
|
}
|
|
|
|
if (SSL_IS_TLS13(s) && !s->server
|
|
&& s->post_handshake_auth == SSL_PHA_REQUESTED)
|
|
s->post_handshake_auth = SSL_PHA_EXT_SENT;
|
|
|
|
/*
|
|
* Only set if there was a Finished message and this isn't after a TLSv1.3
|
|
* post handshake exchange
|
|
*/
|
|
if (cleanuphand) {
|
|
/* skipped if we just sent a HelloRequest */
|
|
s->renegotiate = 0;
|
|
s->new_session = 0;
|
|
s->statem.cleanuphand = 0;
|
|
s->ext.ticket_expected = 0;
|
|
|
|
ssl3_cleanup_key_block(s);
|
|
|
|
if (s->server) {
|
|
/*
|
|
* In TLSv1.3 we update the cache as part of constructing the
|
|
* NewSessionTicket
|
|
*/
|
|
if (!SSL_IS_TLS13(s))
|
|
ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
|
|
|
|
/* N.B. s->ctx may not equal s->session_ctx */
|
|
tsan_counter(&s->ctx->stats.sess_accept_good);
|
|
s->handshake_func = ossl_statem_accept;
|
|
} else {
|
|
if (SSL_IS_TLS13(s)) {
|
|
/*
|
|
* We encourage applications to only use TLSv1.3 tickets once,
|
|
* so we remove this one from the cache.
|
|
*/
|
|
if ((s->session_ctx->session_cache_mode
|
|
& SSL_SESS_CACHE_CLIENT) != 0)
|
|
SSL_CTX_remove_session(s->session_ctx, s->session);
|
|
} else {
|
|
/*
|
|
* In TLSv1.3 we update the cache as part of processing the
|
|
* NewSessionTicket
|
|
*/
|
|
ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
|
|
}
|
|
if (s->hit)
|
|
tsan_counter(&s->session_ctx->stats.sess_hit);
|
|
|
|
s->handshake_func = ossl_statem_connect;
|
|
tsan_counter(&s->session_ctx->stats.sess_connect_good);
|
|
}
|
|
|
|
if (SSL_IS_DTLS(s)) {
|
|
/* done with handshaking */
|
|
s->d1->handshake_read_seq = 0;
|
|
s->d1->handshake_write_seq = 0;
|
|
s->d1->next_handshake_write_seq = 0;
|
|
dtls1_clear_received_buffer(s);
|
|
}
|
|
}
|
|
|
|
if (s->info_callback != NULL)
|
|
cb = s->info_callback;
|
|
else if (s->ctx->info_callback != NULL)
|
|
cb = s->ctx->info_callback;
|
|
|
|
/* The callback may expect us to not be in init at handshake done */
|
|
ossl_statem_set_in_init(s, 0);
|
|
|
|
if (cb != NULL) {
|
|
if (cleanuphand
|
|
|| !SSL_IS_TLS13(s)
|
|
|| SSL_IS_FIRST_HANDSHAKE(s))
|
|
cb(s, SSL_CB_HANDSHAKE_DONE, 1);
|
|
}
|
|
|
|
if (!stop) {
|
|
/* If we've got more work to do we go back into init */
|
|
ossl_statem_set_in_init(s, 1);
|
|
return WORK_FINISHED_CONTINUE;
|
|
}
|
|
|
|
return WORK_FINISHED_STOP;
|
|
}
|
|
|
|
int tls_get_message_header(SSL *s, int *mt)
|
|
{
|
|
/* s->init_num < SSL3_HM_HEADER_LENGTH */
|
|
int skip_message, i, recvd_type;
|
|
unsigned char *p;
|
|
size_t l, readbytes;
|
|
|
|
p = (unsigned char *)s->init_buf->data;
|
|
|
|
do {
|
|
while (s->init_num < SSL3_HM_HEADER_LENGTH) {
|
|
i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &recvd_type,
|
|
&p[s->init_num],
|
|
SSL3_HM_HEADER_LENGTH - s->init_num,
|
|
0, &readbytes);
|
|
if (i <= 0) {
|
|
s->rwstate = SSL_READING;
|
|
return 0;
|
|
}
|
|
if (recvd_type == SSL3_RT_CHANGE_CIPHER_SPEC) {
|
|
/*
|
|
* A ChangeCipherSpec must be a single byte and may not occur
|
|
* in the middle of a handshake message.
|
|
*/
|
|
if (s->init_num != 0 || readbytes != 1 || p[0] != SSL3_MT_CCS) {
|
|
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE,
|
|
SSL_F_TLS_GET_MESSAGE_HEADER,
|
|
SSL_R_BAD_CHANGE_CIPHER_SPEC);
|
|
return 0;
|
|
}
|
|
if (s->statem.hand_state == TLS_ST_BEFORE
|
|
&& (s->s3->flags & TLS1_FLAGS_STATELESS) != 0) {
|
|
/*
|
|
* We are stateless and we received a CCS. Probably this is
|
|
* from a client between the first and second ClientHellos.
|
|
* We should ignore this, but return an error because we do
|
|
* not return success until we see the second ClientHello
|
|
* with a valid cookie.
|
|
*/
|
|
return 0;
|
|
}
|
|
s->s3->tmp.message_type = *mt = SSL3_MT_CHANGE_CIPHER_SPEC;
|
|
s->init_num = readbytes - 1;
|
|
s->init_msg = s->init_buf->data;
|
|
s->s3->tmp.message_size = readbytes;
|
|
return 1;
|
|
} else if (recvd_type != SSL3_RT_HANDSHAKE) {
|
|
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE,
|
|
SSL_F_TLS_GET_MESSAGE_HEADER,
|
|
SSL_R_CCS_RECEIVED_EARLY);
|
|
return 0;
|
|
}
|
|
s->init_num += readbytes;
|
|
}
|
|
|
|
skip_message = 0;
|
|
if (!s->server)
|
|
if (s->statem.hand_state != TLS_ST_OK
|
|
&& p[0] == SSL3_MT_HELLO_REQUEST)
|
|
/*
|
|
* The server may always send 'Hello Request' messages --
|
|
* we are doing a handshake anyway now, so ignore them if
|
|
* their format is correct. Does not count for 'Finished'
|
|
* MAC.
|
|
*/
|
|
if (p[1] == 0 && p[2] == 0 && p[3] == 0) {
|
|
s->init_num = 0;
|
|
skip_message = 1;
|
|
|
|
if (s->msg_callback)
|
|
s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
|
|
p, SSL3_HM_HEADER_LENGTH, s,
|
|
s->msg_callback_arg);
|
|
}
|
|
} while (skip_message);
|
|
/* s->init_num == SSL3_HM_HEADER_LENGTH */
|
|
|
|
*mt = *p;
|
|
s->s3->tmp.message_type = *(p++);
|
|
|
|
if (RECORD_LAYER_is_sslv2_record(&s->rlayer)) {
|
|
/*
|
|
* Only happens with SSLv3+ in an SSLv2 backward compatible
|
|
* ClientHello
|
|
*
|
|
* Total message size is the remaining record bytes to read
|
|
* plus the SSL3_HM_HEADER_LENGTH bytes that we already read
|
|
*/
|
|
l = RECORD_LAYER_get_rrec_length(&s->rlayer)
|
|
+ SSL3_HM_HEADER_LENGTH;
|
|
s->s3->tmp.message_size = l;
|
|
|
|
s->init_msg = s->init_buf->data;
|
|
s->init_num = SSL3_HM_HEADER_LENGTH;
|
|
} else {
|
|
n2l3(p, l);
|
|
/* BUF_MEM_grow takes an 'int' parameter */
|
|
if (l > (INT_MAX - SSL3_HM_HEADER_LENGTH)) {
|
|
SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_GET_MESSAGE_HEADER,
|
|
SSL_R_EXCESSIVE_MESSAGE_SIZE);
|
|
return 0;
|
|
}
|
|
s->s3->tmp.message_size = l;
|
|
|
|
s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH;
|
|
s->init_num = 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int tls_get_message_body(SSL *s, size_t *len)
|
|
{
|
|
size_t n, readbytes;
|
|
unsigned char *p;
|
|
int i;
|
|
|
|
if (s->s3->tmp.message_type == SSL3_MT_CHANGE_CIPHER_SPEC) {
|
|
/* We've already read everything in */
|
|
*len = (unsigned long)s->init_num;
|
|
return 1;
|
|
}
|
|
|
|
p = s->init_msg;
|
|
n = s->s3->tmp.message_size - s->init_num;
|
|
while (n > 0) {
|
|
i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL,
|
|
&p[s->init_num], n, 0, &readbytes);
|
|
if (i <= 0) {
|
|
s->rwstate = SSL_READING;
|
|
*len = 0;
|
|
return 0;
|
|
}
|
|
s->init_num += readbytes;
|
|
n -= readbytes;
|
|
}
|
|
|
|
/*
|
|
* If receiving Finished, record MAC of prior handshake messages for
|
|
* Finished verification.
|
|
*/
|
|
if (*(s->init_buf->data) == SSL3_MT_FINISHED && !ssl3_take_mac(s)) {
|
|
/* SSLfatal() already called */
|
|
*len = 0;
|
|
return 0;
|
|
}
|
|
|
|
/* Feed this message into MAC computation. */
|
|
if (RECORD_LAYER_is_sslv2_record(&s->rlayer)) {
|
|
if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
|
|
s->init_num)) {
|
|
/* SSLfatal() already called */
|
|
*len = 0;
|
|
return 0;
|
|
}
|
|
if (s->msg_callback)
|
|
s->msg_callback(0, SSL2_VERSION, 0, s->init_buf->data,
|
|
(size_t)s->init_num, s, s->msg_callback_arg);
|
|
} else {
|
|
/*
|
|
* We defer feeding in the HRR until later. We'll do it as part of
|
|
* processing the message
|
|
* The TLsv1.3 handshake transcript stops at the ClientFinished
|
|
* message.
|
|
*/
|
|
#define SERVER_HELLO_RANDOM_OFFSET (SSL3_HM_HEADER_LENGTH + 2)
|
|
/* KeyUpdate and NewSessionTicket do not need to be added */
|
|
if (!SSL_IS_TLS13(s) || (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET
|
|
&& s->s3->tmp.message_type != SSL3_MT_KEY_UPDATE)) {
|
|
if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO
|
|
|| s->init_num < SERVER_HELLO_RANDOM_OFFSET + SSL3_RANDOM_SIZE
|
|
|| memcmp(hrrrandom,
|
|
s->init_buf->data + SERVER_HELLO_RANDOM_OFFSET,
|
|
SSL3_RANDOM_SIZE) != 0) {
|
|
if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
|
|
s->init_num + SSL3_HM_HEADER_LENGTH)) {
|
|
/* SSLfatal() already called */
|
|
*len = 0;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
if (s->msg_callback)
|
|
s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data,
|
|
(size_t)s->init_num + SSL3_HM_HEADER_LENGTH, s,
|
|
s->msg_callback_arg);
|
|
}
|
|
|
|
*len = s->init_num;
|
|
return 1;
|
|
}
|
|
|
|
static const X509ERR2ALERT x509table[] = {
|
|
{X509_V_ERR_APPLICATION_VERIFICATION, SSL_AD_HANDSHAKE_FAILURE},
|
|
{X509_V_ERR_CA_KEY_TOO_SMALL, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_CA_MD_TOO_WEAK, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_CERT_CHAIN_TOO_LONG, SSL_AD_UNKNOWN_CA},
|
|
{X509_V_ERR_CERT_HAS_EXPIRED, SSL_AD_CERTIFICATE_EXPIRED},
|
|
{X509_V_ERR_CERT_NOT_YET_VALID, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_CERT_REJECTED, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_CERT_REVOKED, SSL_AD_CERTIFICATE_REVOKED},
|
|
{X509_V_ERR_CERT_SIGNATURE_FAILURE, SSL_AD_DECRYPT_ERROR},
|
|
{X509_V_ERR_CERT_UNTRUSTED, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_CRL_HAS_EXPIRED, SSL_AD_CERTIFICATE_EXPIRED},
|
|
{X509_V_ERR_CRL_NOT_YET_VALID, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_CRL_SIGNATURE_FAILURE, SSL_AD_DECRYPT_ERROR},
|
|
{X509_V_ERR_DANE_NO_MATCH, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT, SSL_AD_UNKNOWN_CA},
|
|
{X509_V_ERR_EE_KEY_TOO_SMALL, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_EMAIL_MISMATCH, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_HOSTNAME_MISMATCH, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_INVALID_CA, SSL_AD_UNKNOWN_CA},
|
|
{X509_V_ERR_INVALID_CALL, SSL_AD_INTERNAL_ERROR},
|
|
{X509_V_ERR_INVALID_PURPOSE, SSL_AD_UNSUPPORTED_CERTIFICATE},
|
|
{X509_V_ERR_IP_ADDRESS_MISMATCH, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_OUT_OF_MEM, SSL_AD_INTERNAL_ERROR},
|
|
{X509_V_ERR_PATH_LENGTH_EXCEEDED, SSL_AD_UNKNOWN_CA},
|
|
{X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN, SSL_AD_UNKNOWN_CA},
|
|
{X509_V_ERR_STORE_LOOKUP, SSL_AD_INTERNAL_ERROR},
|
|
{X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE, SSL_AD_BAD_CERTIFICATE},
|
|
{X509_V_ERR_UNABLE_TO_GET_CRL, SSL_AD_UNKNOWN_CA},
|
|
{X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER, SSL_AD_UNKNOWN_CA},
|
|
{X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT, SSL_AD_UNKNOWN_CA},
|
|
{X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY, SSL_AD_UNKNOWN_CA},
|
|
{X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE, SSL_AD_UNKNOWN_CA},
|
|
{X509_V_ERR_UNSPECIFIED, SSL_AD_INTERNAL_ERROR},
|
|
|
|
/* Last entry; return this if we don't find the value above. */
|
|
{X509_V_OK, SSL_AD_CERTIFICATE_UNKNOWN}
|
|
};
|
|
|
|
int ssl_x509err2alert(int x509err)
|
|
{
|
|
const X509ERR2ALERT *tp;
|
|
|
|
for (tp = x509table; tp->x509err != X509_V_OK; ++tp)
|
|
if (tp->x509err == x509err)
|
|
break;
|
|
return tp->alert;
|
|
}
|
|
|
|
int ssl_allow_compression(SSL *s)
|
|
{
|
|
if (s->options & SSL_OP_NO_COMPRESSION)
|
|
return 0;
|
|
return ssl_security(s, SSL_SECOP_COMPRESSION, 0, 0, NULL);
|
|
}
|
|
|
|
static int version_cmp(const SSL *s, int a, int b)
|
|
{
|
|
int dtls = SSL_IS_DTLS(s);
|
|
|
|
if (a == b)
|
|
return 0;
|
|
if (!dtls)
|
|
return a < b ? -1 : 1;
|
|
return DTLS_VERSION_LT(a, b) ? -1 : 1;
|
|
}
|
|
|
|
typedef struct {
|
|
int version;
|
|
const SSL_METHOD *(*cmeth) (void);
|
|
const SSL_METHOD *(*smeth) (void);
|
|
} version_info;
|
|
|
|
#if TLS_MAX_VERSION != TLS1_3_VERSION
|
|
# error Code needs update for TLS_method() support beyond TLS1_3_VERSION.
|
|
#endif
|
|
|
|
/* Must be in order high to low */
|
|
static const version_info tls_version_table[] = {
|
|
#ifndef OPENSSL_NO_TLS1_3
|
|
{TLS1_3_VERSION, tlsv1_3_client_method, tlsv1_3_server_method},
|
|
#else
|
|
{TLS1_3_VERSION, NULL, NULL},
|
|
#endif
|
|
#ifndef OPENSSL_NO_TLS1_2
|
|
{TLS1_2_VERSION, tlsv1_2_client_method, tlsv1_2_server_method},
|
|
#else
|
|
{TLS1_2_VERSION, NULL, NULL},
|
|
#endif
|
|
#ifndef OPENSSL_NO_TLS1_1
|
|
{TLS1_1_VERSION, tlsv1_1_client_method, tlsv1_1_server_method},
|
|
#else
|
|
{TLS1_1_VERSION, NULL, NULL},
|
|
#endif
|
|
#ifndef OPENSSL_NO_TLS1
|
|
{TLS1_VERSION, tlsv1_client_method, tlsv1_server_method},
|
|
#else
|
|
{TLS1_VERSION, NULL, NULL},
|
|
#endif
|
|
#ifndef OPENSSL_NO_SSL3
|
|
{SSL3_VERSION, sslv3_client_method, sslv3_server_method},
|
|
#else
|
|
{SSL3_VERSION, NULL, NULL},
|
|
#endif
|
|
{0, NULL, NULL},
|
|
};
|
|
|
|
#if DTLS_MAX_VERSION != DTLS1_2_VERSION
|
|
# error Code needs update for DTLS_method() support beyond DTLS1_2_VERSION.
|
|
#endif
|
|
|
|
/* Must be in order high to low */
|
|
static const version_info dtls_version_table[] = {
|
|
#ifndef OPENSSL_NO_DTLS1_2
|
|
{DTLS1_2_VERSION, dtlsv1_2_client_method, dtlsv1_2_server_method},
|
|
#else
|
|
{DTLS1_2_VERSION, NULL, NULL},
|
|
#endif
|
|
#ifndef OPENSSL_NO_DTLS1
|
|
{DTLS1_VERSION, dtlsv1_client_method, dtlsv1_server_method},
|
|
{DTLS1_BAD_VER, dtls_bad_ver_client_method, NULL},
|
|
#else
|
|
{DTLS1_VERSION, NULL, NULL},
|
|
{DTLS1_BAD_VER, NULL, NULL},
|
|
#endif
|
|
{0, NULL, NULL},
|
|
};
|
|
|
|
/*
|
|
* ssl_method_error - Check whether an SSL_METHOD is enabled.
|
|
*
|
|
* @s: The SSL handle for the candidate method
|
|
* @method: the intended method.
|
|
*
|
|
* Returns 0 on success, or an SSL error reason on failure.
|
|
*/
|
|
static int ssl_method_error(const SSL *s, const SSL_METHOD *method)
|
|
{
|
|
int version = method->version;
|
|
|
|
if ((s->min_proto_version != 0 &&
|
|
version_cmp(s, version, s->min_proto_version) < 0) ||
|
|
ssl_security(s, SSL_SECOP_VERSION, 0, version, NULL) == 0)
|
|
return SSL_R_VERSION_TOO_LOW;
|
|
|
|
if (s->max_proto_version != 0 &&
|
|
version_cmp(s, version, s->max_proto_version) > 0)
|
|
return SSL_R_VERSION_TOO_HIGH;
|
|
|
|
if ((s->options & method->mask) != 0)
|
|
return SSL_R_UNSUPPORTED_PROTOCOL;
|
|
if ((method->flags & SSL_METHOD_NO_SUITEB) != 0 && tls1_suiteb(s))
|
|
return SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Only called by servers. Returns 1 if the server has a TLSv1.3 capable
|
|
* certificate type, or has PSK or a certificate callback configured. Otherwise
|
|
* returns 0.
|
|
*/
|
|
static int is_tls13_capable(const SSL *s)
|
|
{
|
|
int i;
|
|
#ifndef OPENSSL_NO_EC
|
|
int curve;
|
|
EC_KEY *eckey;
|
|
#endif
|
|
|
|
#ifndef OPENSSL_NO_PSK
|
|
if (s->psk_server_callback != NULL)
|
|
return 1;
|
|
#endif
|
|
|
|
if (s->psk_find_session_cb != NULL || s->cert->cert_cb != NULL)
|
|
return 1;
|
|
|
|
for (i = 0; i < SSL_PKEY_NUM; i++) {
|
|
/* Skip over certs disallowed for TLSv1.3 */
|
|
switch (i) {
|
|
case SSL_PKEY_DSA_SIGN:
|
|
case SSL_PKEY_GOST01:
|
|
case SSL_PKEY_GOST12_256:
|
|
case SSL_PKEY_GOST12_512:
|
|
continue;
|
|
default:
|
|
break;
|
|
}
|
|
if (!ssl_has_cert(s, i))
|
|
continue;
|
|
#ifndef OPENSSL_NO_EC
|
|
if (i != SSL_PKEY_ECC)
|
|
return 1;
|
|
/*
|
|
* Prior to TLSv1.3 sig algs allowed any curve to be used. TLSv1.3 is
|
|
* more restrictive so check that our sig algs are consistent with this
|
|
* EC cert. See section 4.2.3 of RFC8446.
|
|
*/
|
|
eckey = EVP_PKEY_get0_EC_KEY(s->cert->pkeys[SSL_PKEY_ECC].privatekey);
|
|
if (eckey == NULL)
|
|
continue;
|
|
curve = EC_GROUP_get_curve_name(EC_KEY_get0_group(eckey));
|
|
if (tls_check_sigalg_curve(s, curve))
|
|
return 1;
|
|
#else
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ssl_version_supported - Check that the specified `version` is supported by
|
|
* `SSL *` instance
|
|
*
|
|
* @s: The SSL handle for the candidate method
|
|
* @version: Protocol version to test against
|
|
*
|
|
* Returns 1 when supported, otherwise 0
|
|
*/
|
|
int ssl_version_supported(const SSL *s, int version, const SSL_METHOD **meth)
|
|
{
|
|
const version_info *vent;
|
|
const version_info *table;
|
|
|
|
switch (s->method->version) {
|
|
default:
|
|
/* Version should match method version for non-ANY method */
|
|
return version_cmp(s, version, s->version) == 0;
|
|
case TLS_ANY_VERSION:
|
|
table = tls_version_table;
|
|
break;
|
|
case DTLS_ANY_VERSION:
|
|
table = dtls_version_table;
|
|
break;
|
|
}
|
|
|
|
for (vent = table;
|
|
vent->version != 0 && version_cmp(s, version, vent->version) <= 0;
|
|
++vent) {
|
|
if (vent->cmeth != NULL
|
|
&& version_cmp(s, version, vent->version) == 0
|
|
&& ssl_method_error(s, vent->cmeth()) == 0
|
|
&& (!s->server
|
|
|| version != TLS1_3_VERSION
|
|
|| is_tls13_capable(s))) {
|
|
if (meth != NULL)
|
|
*meth = vent->cmeth();
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ssl_check_version_downgrade - In response to RFC7507 SCSV version
|
|
* fallback indication from a client check whether we're using the highest
|
|
* supported protocol version.
|
|
*
|
|
* @s server SSL handle.
|
|
*
|
|
* Returns 1 when using the highest enabled version, 0 otherwise.
|
|
*/
|
|
int ssl_check_version_downgrade(SSL *s)
|
|
{
|
|
const version_info *vent;
|
|
const version_info *table;
|
|
|
|
/*
|
|
* Check that the current protocol is the highest enabled version
|
|
* (according to s->ctx->method, as version negotiation may have changed
|
|
* s->method).
|
|
*/
|
|
if (s->version == s->ctx->method->version)
|
|
return 1;
|
|
|
|
/*
|
|
* Apparently we're using a version-flexible SSL_METHOD (not at its
|
|
* highest protocol version).
|
|
*/
|
|
if (s->ctx->method->version == TLS_method()->version)
|
|
table = tls_version_table;
|
|
else if (s->ctx->method->version == DTLS_method()->version)
|
|
table = dtls_version_table;
|
|
else {
|
|
/* Unexpected state; fail closed. */
|
|
return 0;
|
|
}
|
|
|
|
for (vent = table; vent->version != 0; ++vent) {
|
|
if (vent->smeth != NULL && ssl_method_error(s, vent->smeth()) == 0)
|
|
return s->version == vent->version;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ssl_set_version_bound - set an upper or lower bound on the supported (D)TLS
|
|
* protocols, provided the initial (D)TLS method is version-flexible. This
|
|
* function sanity-checks the proposed value and makes sure the method is
|
|
* version-flexible, then sets the limit if all is well.
|
|
*
|
|
* @method_version: The version of the current SSL_METHOD.
|
|
* @version: the intended limit.
|
|
* @bound: pointer to limit to be updated.
|
|
*
|
|
* Returns 1 on success, 0 on failure.
|
|
*/
|
|
int ssl_set_version_bound(int method_version, int version, int *bound)
|
|
{
|
|
if (version == 0) {
|
|
*bound = version;
|
|
return 1;
|
|
}
|
|
|
|
/*-
|
|
* Restrict TLS methods to TLS protocol versions.
|
|
* Restrict DTLS methods to DTLS protocol versions.
|
|
* Note, DTLS version numbers are decreasing, use comparison macros.
|
|
*
|
|
* Note that for both lower-bounds we use explicit versions, not
|
|
* (D)TLS_MIN_VERSION. This is because we don't want to break user
|
|
* configurations. If the MIN (supported) version ever rises, the user's
|
|
* "floor" remains valid even if no longer available. We don't expect the
|
|
* MAX ceiling to ever get lower, so making that variable makes sense.
|
|
*/
|
|
switch (method_version) {
|
|
default:
|
|
/*
|
|
* XXX For fixed version methods, should we always fail and not set any
|
|
* bounds, always succeed and not set any bounds, or set the bounds and
|
|
* arrange to fail later if they are not met? At present fixed-version
|
|
* methods are not subject to controls that disable individual protocol
|
|
* versions.
|
|
*/
|
|
return 0;
|
|
|
|
case TLS_ANY_VERSION:
|
|
if (version < SSL3_VERSION || version > TLS_MAX_VERSION)
|
|
return 0;
|
|
break;
|
|
|
|
case DTLS_ANY_VERSION:
|
|
if (DTLS_VERSION_GT(version, DTLS_MAX_VERSION) ||
|
|
DTLS_VERSION_LT(version, DTLS1_BAD_VER))
|
|
return 0;
|
|
break;
|
|
}
|
|
|
|
*bound = version;
|
|
return 1;
|
|
}
|
|
|
|
static void check_for_downgrade(SSL *s, int vers, DOWNGRADE *dgrd)
|
|
{
|
|
if (vers == TLS1_2_VERSION
|
|
&& ssl_version_supported(s, TLS1_3_VERSION, NULL)) {
|
|
*dgrd = DOWNGRADE_TO_1_2;
|
|
} else if (!SSL_IS_DTLS(s)
|
|
&& vers < TLS1_2_VERSION
|
|
/*
|
|
* We need to ensure that a server that disables TLSv1.2
|
|
* (creating a hole between TLSv1.3 and TLSv1.1) can still
|
|
* complete handshakes with clients that support TLSv1.2 and
|
|
* below. Therefore we do not enable the sentinel if TLSv1.3 is
|
|
* enabled and TLSv1.2 is not.
|
|
*/
|
|
&& ssl_version_supported(s, TLS1_2_VERSION, NULL)) {
|
|
*dgrd = DOWNGRADE_TO_1_1;
|
|
} else {
|
|
*dgrd = DOWNGRADE_NONE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ssl_choose_server_version - Choose server (D)TLS version. Called when the
|
|
* client HELLO is received to select the final server protocol version and
|
|
* the version specific method.
|
|
*
|
|
* @s: server SSL handle.
|
|
*
|
|
* Returns 0 on success or an SSL error reason number on failure.
|
|
*/
|
|
int ssl_choose_server_version(SSL *s, CLIENTHELLO_MSG *hello, DOWNGRADE *dgrd)
|
|
{
|
|
/*-
|
|
* With version-flexible methods we have an initial state with:
|
|
*
|
|
* s->method->version == (D)TLS_ANY_VERSION,
|
|
* s->version == (D)TLS_MAX_VERSION.
|
|
*
|
|
* So we detect version-flexible methods via the method version, not the
|
|
* handle version.
|
|
*/
|
|
int server_version = s->method->version;
|
|
int client_version = hello->legacy_version;
|
|
const version_info *vent;
|
|
const version_info *table;
|
|
int disabled = 0;
|
|
RAW_EXTENSION *suppversions;
|
|
|
|
s->client_version = client_version;
|
|
|
|
switch (server_version) {
|
|
default:
|
|
if (!SSL_IS_TLS13(s)) {
|
|
if (version_cmp(s, client_version, s->version) < 0)
|
|
return SSL_R_WRONG_SSL_VERSION;
|
|
*dgrd = DOWNGRADE_NONE;
|
|
/*
|
|
* If this SSL handle is not from a version flexible method we don't
|
|
* (and never did) check min/max FIPS or Suite B constraints. Hope
|
|
* that's OK. It is up to the caller to not choose fixed protocol
|
|
* versions they don't want. If not, then easy to fix, just return
|
|
* ssl_method_error(s, s->method)
|
|
*/
|
|
return 0;
|
|
}
|
|
/*
|
|
* Fall through if we are TLSv1.3 already (this means we must be after
|
|
* a HelloRetryRequest
|
|
*/
|
|
/* fall thru */
|
|
case TLS_ANY_VERSION:
|
|
table = tls_version_table;
|
|
break;
|
|
case DTLS_ANY_VERSION:
|
|
table = dtls_version_table;
|
|
break;
|
|
}
|
|
|
|
suppversions = &hello->pre_proc_exts[TLSEXT_IDX_supported_versions];
|
|
|
|
/* If we did an HRR then supported versions is mandatory */
|
|
if (!suppversions->present && s->hello_retry_request != SSL_HRR_NONE)
|
|
return SSL_R_UNSUPPORTED_PROTOCOL;
|
|
|
|
if (suppversions->present && !SSL_IS_DTLS(s)) {
|
|
unsigned int candidate_vers = 0;
|
|
unsigned int best_vers = 0;
|
|
const SSL_METHOD *best_method = NULL;
|
|
PACKET versionslist;
|
|
|
|
suppversions->parsed = 1;
|
|
|
|
if (!PACKET_as_length_prefixed_1(&suppversions->data, &versionslist)) {
|
|
/* Trailing or invalid data? */
|
|
return SSL_R_LENGTH_MISMATCH;
|
|
}
|
|
|
|
/*
|
|
* The TLSv1.3 spec says the client MUST set this to TLS1_2_VERSION.
|
|
* The spec only requires servers to check that it isn't SSLv3:
|
|
* "Any endpoint receiving a Hello message with
|
|
* ClientHello.legacy_version or ServerHello.legacy_version set to
|
|
* 0x0300 MUST abort the handshake with a "protocol_version" alert."
|
|
* We are slightly stricter and require that it isn't SSLv3 or lower.
|
|
* We tolerate TLSv1 and TLSv1.1.
|
|
*/
|
|
if (client_version <= SSL3_VERSION)
|
|
return SSL_R_BAD_LEGACY_VERSION;
|
|
|
|
while (PACKET_get_net_2(&versionslist, &candidate_vers)) {
|
|
if (version_cmp(s, candidate_vers, best_vers) <= 0)
|
|
continue;
|
|
if (ssl_version_supported(s, candidate_vers, &best_method))
|
|
best_vers = candidate_vers;
|
|
}
|
|
if (PACKET_remaining(&versionslist) != 0) {
|
|
/* Trailing data? */
|
|
return SSL_R_LENGTH_MISMATCH;
|
|
}
|
|
|
|
if (best_vers > 0) {
|
|
if (s->hello_retry_request != SSL_HRR_NONE) {
|
|
/*
|
|
* This is after a HelloRetryRequest so we better check that we
|
|
* negotiated TLSv1.3
|
|
*/
|
|
if (best_vers != TLS1_3_VERSION)
|
|
return SSL_R_UNSUPPORTED_PROTOCOL;
|
|
return 0;
|
|
}
|
|
check_for_downgrade(s, best_vers, dgrd);
|
|
s->version = best_vers;
|
|
s->method = best_method;
|
|
return 0;
|
|
}
|
|
return SSL_R_UNSUPPORTED_PROTOCOL;
|
|
}
|
|
|
|
/*
|
|
* If the supported versions extension isn't present, then the highest
|
|
* version we can negotiate is TLSv1.2
|
|
*/
|
|
if (version_cmp(s, client_version, TLS1_3_VERSION) >= 0)
|
|
client_version = TLS1_2_VERSION;
|
|
|
|
/*
|
|
* No supported versions extension, so we just use the version supplied in
|
|
* the ClientHello.
|
|
*/
|
|
for (vent = table; vent->version != 0; ++vent) {
|
|
const SSL_METHOD *method;
|
|
|
|
if (vent->smeth == NULL ||
|
|
version_cmp(s, client_version, vent->version) < 0)
|
|
continue;
|
|
method = vent->smeth();
|
|
if (ssl_method_error(s, method) == 0) {
|
|
check_for_downgrade(s, vent->version, dgrd);
|
|
s->version = vent->version;
|
|
s->method = method;
|
|
return 0;
|
|
}
|
|
disabled = 1;
|
|
}
|
|
return disabled ? SSL_R_UNSUPPORTED_PROTOCOL : SSL_R_VERSION_TOO_LOW;
|
|
}
|
|
|
|
/*
|
|
* ssl_choose_client_version - Choose client (D)TLS version. Called when the
|
|
* server HELLO is received to select the final client protocol version and
|
|
* the version specific method.
|
|
*
|
|
* @s: client SSL handle.
|
|
* @version: The proposed version from the server's HELLO.
|
|
* @extensions: The extensions received
|
|
*
|
|
* Returns 1 on success or 0 on error.
|
|
*/
|
|
int ssl_choose_client_version(SSL *s, int version, RAW_EXTENSION *extensions)
|
|
{
|
|
const version_info *vent;
|
|
const version_info *table;
|
|
int ret, ver_min, ver_max, real_max, origv;
|
|
|
|
origv = s->version;
|
|
s->version = version;
|
|
|
|
/* This will overwrite s->version if the extension is present */
|
|
if (!tls_parse_extension(s, TLSEXT_IDX_supported_versions,
|
|
SSL_EXT_TLS1_2_SERVER_HELLO
|
|
| SSL_EXT_TLS1_3_SERVER_HELLO, extensions,
|
|
NULL, 0)) {
|
|
s->version = origv;
|
|
return 0;
|
|
}
|
|
|
|
if (s->hello_retry_request != SSL_HRR_NONE
|
|
&& s->version != TLS1_3_VERSION) {
|
|
s->version = origv;
|
|
SSLfatal(s, SSL_AD_PROTOCOL_VERSION, SSL_F_SSL_CHOOSE_CLIENT_VERSION,
|
|
SSL_R_WRONG_SSL_VERSION);
|
|
return 0;
|
|
}
|
|
|
|
switch (s->method->version) {
|
|
default:
|
|
if (s->version != s->method->version) {
|
|
s->version = origv;
|
|
SSLfatal(s, SSL_AD_PROTOCOL_VERSION,
|
|
SSL_F_SSL_CHOOSE_CLIENT_VERSION,
|
|
SSL_R_WRONG_SSL_VERSION);
|
|
return 0;
|
|
}
|
|
/*
|
|
* If this SSL handle is not from a version flexible method we don't
|
|
* (and never did) check min/max, FIPS or Suite B constraints. Hope
|
|
* that's OK. It is up to the caller to not choose fixed protocol
|
|
* versions they don't want. If not, then easy to fix, just return
|
|
* ssl_method_error(s, s->method)
|
|
*/
|
|
return 1;
|
|
case TLS_ANY_VERSION:
|
|
table = tls_version_table;
|
|
break;
|
|
case DTLS_ANY_VERSION:
|
|
table = dtls_version_table;
|
|
break;
|
|
}
|
|
|
|
ret = ssl_get_min_max_version(s, &ver_min, &ver_max, &real_max);
|
|
if (ret != 0) {
|
|
s->version = origv;
|
|
SSLfatal(s, SSL_AD_PROTOCOL_VERSION,
|
|
SSL_F_SSL_CHOOSE_CLIENT_VERSION, ret);
|
|
return 0;
|
|
}
|
|
if (SSL_IS_DTLS(s) ? DTLS_VERSION_LT(s->version, ver_min)
|
|
: s->version < ver_min) {
|
|
s->version = origv;
|
|
SSLfatal(s, SSL_AD_PROTOCOL_VERSION,
|
|
SSL_F_SSL_CHOOSE_CLIENT_VERSION, SSL_R_UNSUPPORTED_PROTOCOL);
|
|
return 0;
|
|
} else if (SSL_IS_DTLS(s) ? DTLS_VERSION_GT(s->version, ver_max)
|
|
: s->version > ver_max) {
|
|
s->version = origv;
|
|
SSLfatal(s, SSL_AD_PROTOCOL_VERSION,
|
|
SSL_F_SSL_CHOOSE_CLIENT_VERSION, SSL_R_UNSUPPORTED_PROTOCOL);
|
|
return 0;
|
|
}
|
|
|
|
if ((s->mode & SSL_MODE_SEND_FALLBACK_SCSV) == 0)
|
|
real_max = ver_max;
|
|
|
|
/* Check for downgrades */
|
|
if (s->version == TLS1_2_VERSION && real_max > s->version) {
|
|
if (memcmp(tls12downgrade,
|
|
s->s3->server_random + SSL3_RANDOM_SIZE
|
|
- sizeof(tls12downgrade),
|
|
sizeof(tls12downgrade)) == 0) {
|
|
s->version = origv;
|
|
SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
|
|
SSL_F_SSL_CHOOSE_CLIENT_VERSION,
|
|
SSL_R_INAPPROPRIATE_FALLBACK);
|
|
return 0;
|
|
}
|
|
} else if (!SSL_IS_DTLS(s)
|
|
&& s->version < TLS1_2_VERSION
|
|
&& real_max > s->version) {
|
|
if (memcmp(tls11downgrade,
|
|
s->s3->server_random + SSL3_RANDOM_SIZE
|
|
- sizeof(tls11downgrade),
|
|
sizeof(tls11downgrade)) == 0) {
|
|
s->version = origv;
|
|
SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
|
|
SSL_F_SSL_CHOOSE_CLIENT_VERSION,
|
|
SSL_R_INAPPROPRIATE_FALLBACK);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
for (vent = table; vent->version != 0; ++vent) {
|
|
if (vent->cmeth == NULL || s->version != vent->version)
|
|
continue;
|
|
|
|
s->method = vent->cmeth();
|
|
return 1;
|
|
}
|
|
|
|
s->version = origv;
|
|
SSLfatal(s, SSL_AD_PROTOCOL_VERSION, SSL_F_SSL_CHOOSE_CLIENT_VERSION,
|
|
SSL_R_UNSUPPORTED_PROTOCOL);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ssl_get_min_max_version - get minimum and maximum protocol version
|
|
* @s: The SSL connection
|
|
* @min_version: The minimum supported version
|
|
* @max_version: The maximum supported version
|
|
* @real_max: The highest version below the lowest compile time version hole
|
|
* where that hole lies above at least one run-time enabled
|
|
* protocol.
|
|
*
|
|
* Work out what version we should be using for the initial ClientHello if the
|
|
* version is initially (D)TLS_ANY_VERSION. We apply any explicit SSL_OP_NO_xxx
|
|
* options, the MinProtocol and MaxProtocol configuration commands, any Suite B
|
|
* constraints and any floor imposed by the security level here,
|
|
* so we don't advertise the wrong protocol version to only reject the outcome later.
|
|
*
|
|
* Computing the right floor matters. If, e.g., TLS 1.0 and 1.2 are enabled,
|
|
* TLS 1.1 is disabled, but the security level, Suite-B and/or MinProtocol
|
|
* only allow TLS 1.2, we want to advertise TLS1.2, *not* TLS1.
|
|
*
|
|
* Returns 0 on success or an SSL error reason number on failure. On failure
|
|
* min_version and max_version will also be set to 0.
|
|
*/
|
|
int ssl_get_min_max_version(const SSL *s, int *min_version, int *max_version,
|
|
int *real_max)
|
|
{
|
|
int version, tmp_real_max;
|
|
int hole;
|
|
const SSL_METHOD *single = NULL;
|
|
const SSL_METHOD *method;
|
|
const version_info *table;
|
|
const version_info *vent;
|
|
|
|
switch (s->method->version) {
|
|
default:
|
|
/*
|
|
* If this SSL handle is not from a version flexible method we don't
|
|
* (and never did) check min/max FIPS or Suite B constraints. Hope
|
|
* that's OK. It is up to the caller to not choose fixed protocol
|
|
* versions they don't want. If not, then easy to fix, just return
|
|
* ssl_method_error(s, s->method)
|
|
*/
|
|
*min_version = *max_version = s->version;
|
|
/*
|
|
* Providing a real_max only makes sense where we're using a version
|
|
* flexible method.
|
|
*/
|
|
if (!ossl_assert(real_max == NULL))
|
|
return ERR_R_INTERNAL_ERROR;
|
|
return 0;
|
|
case TLS_ANY_VERSION:
|
|
table = tls_version_table;
|
|
break;
|
|
case DTLS_ANY_VERSION:
|
|
table = dtls_version_table;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* SSL_OP_NO_X disables all protocols above X *if* there are some protocols
|
|
* below X enabled. This is required in order to maintain the "version
|
|
* capability" vector contiguous. Any versions with a NULL client method
|
|
* (protocol version client is disabled at compile-time) is also a "hole".
|
|
*
|
|
* Our initial state is hole == 1, version == 0. That is, versions above
|
|
* the first version in the method table are disabled (a "hole" above
|
|
* the valid protocol entries) and we don't have a selected version yet.
|
|
*
|
|
* Whenever "hole == 1", and we hit an enabled method, its version becomes
|
|
* the selected version, and the method becomes a candidate "single"
|
|
* method. We're no longer in a hole, so "hole" becomes 0.
|
|
*
|
|
* If "hole == 0" and we hit an enabled method, then "single" is cleared,
|
|
* as we support a contiguous range of at least two methods. If we hit
|
|
* a disabled method, then hole becomes true again, but nothing else
|
|
* changes yet, because all the remaining methods may be disabled too.
|
|
* If we again hit an enabled method after the new hole, it becomes
|
|
* selected, as we start from scratch.
|
|
*/
|
|
*min_version = version = 0;
|
|
hole = 1;
|
|
if (real_max != NULL)
|
|
*real_max = 0;
|
|
tmp_real_max = 0;
|
|
for (vent = table; vent->version != 0; ++vent) {
|
|
/*
|
|
* A table entry with a NULL client method is still a hole in the
|
|
* "version capability" vector.
|
|
*/
|
|
if (vent->cmeth == NULL) {
|
|
hole = 1;
|
|
tmp_real_max = 0;
|
|
continue;
|
|
}
|
|
method = vent->cmeth();
|
|
|
|
if (hole == 1 && tmp_real_max == 0)
|
|
tmp_real_max = vent->version;
|
|
|
|
if (ssl_method_error(s, method) != 0) {
|
|
hole = 1;
|
|
} else if (!hole) {
|
|
single = NULL;
|
|
*min_version = method->version;
|
|
} else {
|
|
if (real_max != NULL && tmp_real_max != 0)
|
|
*real_max = tmp_real_max;
|
|
version = (single = method)->version;
|
|
*min_version = version;
|
|
hole = 0;
|
|
}
|
|
}
|
|
|
|
*max_version = version;
|
|
|
|
/* Fail if everything is disabled */
|
|
if (version == 0)
|
|
return SSL_R_NO_PROTOCOLS_AVAILABLE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ssl_set_client_hello_version - Work out what version we should be using for
|
|
* the initial ClientHello.legacy_version field.
|
|
*
|
|
* @s: client SSL handle.
|
|
*
|
|
* Returns 0 on success or an SSL error reason number on failure.
|
|
*/
|
|
int ssl_set_client_hello_version(SSL *s)
|
|
{
|
|
int ver_min, ver_max, ret;
|
|
|
|
/*
|
|
* In a renegotiation we always send the same client_version that we sent
|
|
* last time, regardless of which version we eventually negotiated.
|
|
*/
|
|
if (!SSL_IS_FIRST_HANDSHAKE(s))
|
|
return 0;
|
|
|
|
ret = ssl_get_min_max_version(s, &ver_min, &ver_max, NULL);
|
|
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
s->version = ver_max;
|
|
|
|
/* TLS1.3 always uses TLS1.2 in the legacy_version field */
|
|
if (!SSL_IS_DTLS(s) && ver_max > TLS1_2_VERSION)
|
|
ver_max = TLS1_2_VERSION;
|
|
|
|
s->client_version = ver_max;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Checks a list of |groups| to determine if the |group_id| is in it. If it is
|
|
* and |checkallow| is 1 then additionally check if the group is allowed to be
|
|
* used. Returns 1 if the group is in the list (and allowed if |checkallow| is
|
|
* 1) or 0 otherwise.
|
|
*/
|
|
#ifndef OPENSSL_NO_EC
|
|
int check_in_list(SSL *s, uint16_t group_id, const uint16_t *groups,
|
|
size_t num_groups, int checkallow)
|
|
{
|
|
size_t i;
|
|
|
|
if (groups == NULL || num_groups == 0)
|
|
return 0;
|
|
|
|
for (i = 0; i < num_groups; i++) {
|
|
uint16_t group = groups[i];
|
|
|
|
if (group_id == group
|
|
&& (!checkallow
|
|
|| tls_curve_allowed(s, group, SSL_SECOP_CURVE_CHECK))) {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/* Replace ClientHello1 in the transcript hash with a synthetic message */
|
|
int create_synthetic_message_hash(SSL *s, const unsigned char *hashval,
|
|
size_t hashlen, const unsigned char *hrr,
|
|
size_t hrrlen)
|
|
{
|
|
unsigned char hashvaltmp[EVP_MAX_MD_SIZE];
|
|
unsigned char msghdr[SSL3_HM_HEADER_LENGTH];
|
|
|
|
memset(msghdr, 0, sizeof(msghdr));
|
|
|
|
if (hashval == NULL) {
|
|
hashval = hashvaltmp;
|
|
hashlen = 0;
|
|
/* Get the hash of the initial ClientHello */
|
|
if (!ssl3_digest_cached_records(s, 0)
|
|
|| !ssl_handshake_hash(s, hashvaltmp, sizeof(hashvaltmp),
|
|
&hashlen)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Reinitialise the transcript hash */
|
|
if (!ssl3_init_finished_mac(s)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
/* Inject the synthetic message_hash message */
|
|
msghdr[0] = SSL3_MT_MESSAGE_HASH;
|
|
msghdr[SSL3_HM_HEADER_LENGTH - 1] = (unsigned char)hashlen;
|
|
if (!ssl3_finish_mac(s, msghdr, SSL3_HM_HEADER_LENGTH)
|
|
|| !ssl3_finish_mac(s, hashval, hashlen)) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Now re-inject the HRR and current message if appropriate (we just deleted
|
|
* it when we reinitialised the transcript hash above). Only necessary after
|
|
* receiving a ClientHello2 with a cookie.
|
|
*/
|
|
if (hrr != NULL
|
|
&& (!ssl3_finish_mac(s, hrr, hrrlen)
|
|
|| !ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
|
|
s->s3->tmp.message_size
|
|
+ SSL3_HM_HEADER_LENGTH))) {
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
|
|
{
|
|
return X509_NAME_cmp(*a, *b);
|
|
}
|
|
|
|
int parse_ca_names(SSL *s, PACKET *pkt)
|
|
{
|
|
STACK_OF(X509_NAME) *ca_sk = sk_X509_NAME_new(ca_dn_cmp);
|
|
X509_NAME *xn = NULL;
|
|
PACKET cadns;
|
|
|
|
if (ca_sk == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_PARSE_CA_NAMES,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
/* get the CA RDNs */
|
|
if (!PACKET_get_length_prefixed_2(pkt, &cadns)) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR,SSL_F_PARSE_CA_NAMES,
|
|
SSL_R_LENGTH_MISMATCH);
|
|
goto err;
|
|
}
|
|
|
|
while (PACKET_remaining(&cadns)) {
|
|
const unsigned char *namestart, *namebytes;
|
|
unsigned int name_len;
|
|
|
|
if (!PACKET_get_net_2(&cadns, &name_len)
|
|
|| !PACKET_get_bytes(&cadns, &namebytes, name_len)) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_PARSE_CA_NAMES,
|
|
SSL_R_LENGTH_MISMATCH);
|
|
goto err;
|
|
}
|
|
|
|
namestart = namebytes;
|
|
if ((xn = d2i_X509_NAME(NULL, &namebytes, name_len)) == NULL) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_PARSE_CA_NAMES,
|
|
ERR_R_ASN1_LIB);
|
|
goto err;
|
|
}
|
|
if (namebytes != (namestart + name_len)) {
|
|
SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_PARSE_CA_NAMES,
|
|
SSL_R_CA_DN_LENGTH_MISMATCH);
|
|
goto err;
|
|
}
|
|
|
|
if (!sk_X509_NAME_push(ca_sk, xn)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_PARSE_CA_NAMES,
|
|
ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
xn = NULL;
|
|
}
|
|
|
|
sk_X509_NAME_pop_free(s->s3->tmp.peer_ca_names, X509_NAME_free);
|
|
s->s3->tmp.peer_ca_names = ca_sk;
|
|
|
|
return 1;
|
|
|
|
err:
|
|
sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
|
|
X509_NAME_free(xn);
|
|
return 0;
|
|
}
|
|
|
|
const STACK_OF(X509_NAME) *get_ca_names(SSL *s)
|
|
{
|
|
const STACK_OF(X509_NAME) *ca_sk = NULL;;
|
|
|
|
if (s->server) {
|
|
ca_sk = SSL_get_client_CA_list(s);
|
|
if (ca_sk != NULL && sk_X509_NAME_num(ca_sk) == 0)
|
|
ca_sk = NULL;
|
|
}
|
|
|
|
if (ca_sk == NULL)
|
|
ca_sk = SSL_get0_CA_list(s);
|
|
|
|
return ca_sk;
|
|
}
|
|
|
|
int construct_ca_names(SSL *s, const STACK_OF(X509_NAME) *ca_sk, WPACKET *pkt)
|
|
{
|
|
/* Start sub-packet for client CA list */
|
|
if (!WPACKET_start_sub_packet_u16(pkt)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_CA_NAMES,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
if (ca_sk != NULL) {
|
|
int i;
|
|
|
|
for (i = 0; i < sk_X509_NAME_num(ca_sk); i++) {
|
|
unsigned char *namebytes;
|
|
X509_NAME *name = sk_X509_NAME_value(ca_sk, i);
|
|
int namelen;
|
|
|
|
if (name == NULL
|
|
|| (namelen = i2d_X509_NAME(name, NULL)) < 0
|
|
|| !WPACKET_sub_allocate_bytes_u16(pkt, namelen,
|
|
&namebytes)
|
|
|| i2d_X509_NAME(name, &namebytes) != namelen) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_CA_NAMES,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!WPACKET_close(pkt)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_CA_NAMES,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Create a buffer containing data to be signed for server key exchange */
|
|
size_t construct_key_exchange_tbs(SSL *s, unsigned char **ptbs,
|
|
const void *param, size_t paramlen)
|
|
{
|
|
size_t tbslen = 2 * SSL3_RANDOM_SIZE + paramlen;
|
|
unsigned char *tbs = OPENSSL_malloc(tbslen);
|
|
|
|
if (tbs == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_KEY_EXCHANGE_TBS,
|
|
ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
memcpy(tbs, s->s3->client_random, SSL3_RANDOM_SIZE);
|
|
memcpy(tbs + SSL3_RANDOM_SIZE, s->s3->server_random, SSL3_RANDOM_SIZE);
|
|
|
|
memcpy(tbs + SSL3_RANDOM_SIZE * 2, param, paramlen);
|
|
|
|
*ptbs = tbs;
|
|
return tbslen;
|
|
}
|
|
|
|
/*
|
|
* Saves the current handshake digest for Post-Handshake Auth,
|
|
* Done after ClientFinished is processed, done exactly once
|
|
*/
|
|
int tls13_save_handshake_digest_for_pha(SSL *s)
|
|
{
|
|
if (s->pha_dgst == NULL) {
|
|
if (!ssl3_digest_cached_records(s, 1))
|
|
/* SSLfatal() already called */
|
|
return 0;
|
|
|
|
s->pha_dgst = EVP_MD_CTX_new();
|
|
if (s->pha_dgst == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
|
|
SSL_F_TLS13_SAVE_HANDSHAKE_DIGEST_FOR_PHA,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
if (!EVP_MD_CTX_copy_ex(s->pha_dgst,
|
|
s->s3->handshake_dgst)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
|
|
SSL_F_TLS13_SAVE_HANDSHAKE_DIGEST_FOR_PHA,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Restores the Post-Handshake Auth handshake digest
|
|
* Done just before sending/processing the Cert Request
|
|
*/
|
|
int tls13_restore_handshake_digest_for_pha(SSL *s)
|
|
{
|
|
if (s->pha_dgst == NULL) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
|
|
SSL_F_TLS13_RESTORE_HANDSHAKE_DIGEST_FOR_PHA,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
if (!EVP_MD_CTX_copy_ex(s->s3->handshake_dgst,
|
|
s->pha_dgst)) {
|
|
SSLfatal(s, SSL_AD_INTERNAL_ERROR,
|
|
SSL_F_TLS13_RESTORE_HANDSHAKE_DIGEST_FOR_PHA,
|
|
ERR_R_INTERNAL_ERROR);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|