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gateway2/Tongsuo-8.4.0/ssl/statem_ntls/ntls_statem_lib.c
cheney faeec0af4d 编译
2026-07-11 13:40:57 +08:00

2123 lines
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/*
* Copyright 2016-2022 The OpenSSL Project Authors. All Rights Reserved.
* Copyright 2022 The Tongsuo Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <limits.h>
#include <string.h>
#include <stdio.h>
#include <openssl/core_names.h>
#include "ntls_ssl_local.h"
#include "ntls_statem_local.h"
#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/trace.h>
#include "internal/sockets.h"
static int ssl_add_cert_to_wpacket_ntls(SSL *s, WPACKET *pkt, X509 *x);
/*
* Map error codes to TLS/SSL alart types.
*/
typedef struct x509err2alert_st {
int x509err;
int alert;
} X509ERR2ALERT;
/* Fixed value used in the ServerHello random field to identify an HRR */
const unsigned char hrrrandom_ntls[] = {
0xcf, 0x21, 0xad, 0x74, 0xe5, 0x9a, 0x61, 0x11, 0xbe, 0x1d, 0x8c, 0x02,
0x1e, 0x65, 0xb8, 0x91, 0xc2, 0xa2, 0x11, 0x16, 0x7a, 0xbb, 0x8c, 0x5e,
0x07, 0x9e, 0x09, 0xe2, 0xc8, 0xa8, 0x33, 0x9c
};
/*
* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or
* SSL3_RT_CHANGE_CIPHER_SPEC)
*/
int ssl3_do_write_ntls(SSL *s, int type)
{
int ret;
size_t written = 0;
ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off],
s->init_num, &written);
if (ret < 0)
return -1;
if (type == SSL3_RT_HANDSHAKE)
/*
* should not be done for 'Hello Request's, but in that case we'll
* ignore the result anyway
*/
if (!ssl3_finish_mac(s,
(unsigned char *)&s->init_buf->data[s->init_off],
written))
return -1;
if (written == s->init_num) {
if (s->msg_callback)
s->msg_callback(1, s->version, type, s->init_buf->data,
(size_t)(s->init_off + s->init_num), s,
s->msg_callback_arg);
return 1;
}
s->init_off += written;
s->init_num -= written;
return 0;
}
int tls_close_construct_packet_ntls(SSL *s, WPACKET *pkt, int htype)
{
size_t msglen;
if ((htype != SSL3_MT_CHANGE_CIPHER_SPEC && !WPACKET_close(pkt))
|| !WPACKET_get_length(pkt, &msglen)
|| msglen > INT_MAX)
return 0;
s->init_num = (int)msglen;
s->init_off = 0;
return 1;
}
int tls_setup_handshake_ntls(SSL *s)
{
int ver_min, ver_max, ok;
if (!ssl3_init_finished_mac(s)) {
/* SSLfatal_ntls() already called */
return 0;
}
/* Reset any extension flags */
memset(s->ext.extflags, 0, sizeof(s->ext.extflags));
if (ssl_get_min_max_version(s, &ver_min, &ver_max, NULL) != 0) {
SSLfatal_ntls(s, SSL_AD_PROTOCOL_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE);
return 0;
}
ok = 0;
if (s->server) {
STACK_OF(SSL_CIPHER) *ciphers = SSL_get_ciphers(s);
int i;
/*
* Sanity check that the maximum version we accept has ciphers
* enabled. For clients we do this check during construction of the
* ClientHello.
*/
for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
if (ver_max >= c->min_tls && ver_max <= c->max_tls) {
ok = 1;
}
if (ok)
break;
}
if (!ok) {
SSLfatal_data_ntls(s, SSL_AD_HANDSHAKE_FAILURE,
SSL_R_NO_CIPHERS_AVAILABLE,
"No ciphers enabled for max supported "
"SSL/TLS version");
return 0;
}
if (SSL_IS_FIRST_HANDSHAKE(s)) {
/* N.B. s->session_ctx == s->ctx here */
ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_accept);
} else {
/* N.B. s->ctx may not equal s->session_ctx */
ssl_tsan_counter(s->ctx, &s->ctx->stats.sess_accept_renegotiate);
s->s3.tmp.cert_request = 0;
}
} else {
if (SSL_IS_FIRST_HANDSHAKE(s))
ssl_tsan_counter(s->session_ctx, &s->session_ctx->stats.sess_connect);
else
ssl_tsan_counter(s->session_ctx,
&s->session_ctx->stats.sess_connect_renegotiate);
/* mark client_random uninitialized */
memset(s->s3.client_random, 0, sizeof(s->s3.client_random));
s->hit = 0;
s->s3.tmp.cert_req = 0;
}
return 1;
}
/*
* Size of the to-be-signed TLS13 data, without the hash size itself:
* 64 bytes of value 32, 33 context bytes, 1 byte separator
*/
#define TLS13_TBS_START_SIZE 64
#define TLS13_TBS_PREAMBLE_SIZE (TLS13_TBS_START_SIZE + 33 + 1)
static int get_cert_verify_tbs_data_ntls(SSL *s, void **hdata, size_t *hdatalen)
{
size_t retlen;
long retlen_l;
retlen = retlen_l = BIO_get_mem_data(s->s3.handshake_buffer, hdata);
if (retlen_l <= 0) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
*hdatalen = retlen;
return 1;
}
int tls_construct_cert_verify_ntls(SSL *s, WPACKET *pkt)
{
EVP_PKEY *pkey = NULL;
const EVP_MD *md = NULL;
EVP_MD_CTX *mctx = NULL;
EVP_MD_CTX *mctx2 = NULL;
EVP_PKEY_CTX *pctx = NULL;
size_t hdatalen = 0, siglen = 0;
void *hdata;
unsigned char *sig = NULL;
unsigned char out[EVP_MAX_MD_SIZE];
size_t outlen = 0;
const SIGALG_LOOKUP *lu = s->s3.tmp.sigalg;
if (lu == NULL || s->s3.tmp.sign_cert == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
goto err;
}
pkey = s->s3.tmp.sign_cert->privatekey;
if (pkey == NULL || !tls1_lookup_md(s->ctx, lu, &md)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
goto err;
}
mctx = EVP_MD_CTX_new();
mctx2 = EVP_MD_CTX_new();
if (mctx == NULL || mctx2 == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
goto err;
}
/* Get the data to be signed */
if (!get_cert_verify_tbs_data_ntls(s, &hdata, &hdatalen)) {
/* SSLfatal() already called */
goto err;
}
if (!EVP_DigestInit_ex(mctx2, md, NULL)
|| !EVP_DigestUpdate(mctx2, hdata, hdatalen)
|| !EVP_DigestFinal(mctx2, out, (unsigned int *)&outlen)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
goto err;
}
if (EVP_DigestSignInit_ex(mctx, &pctx,
md == NULL ? NULL : EVP_MD_get0_name(md),
s->ctx->libctx, s->ctx->propq, pkey,
NULL) <= 0) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
goto err;
}
if (EVP_PKEY_is_a(pkey, "SM2")) {
if (EVP_PKEY_CTX_set1_id(pctx, SM2_DEFAULT_ID,
SM2_DEFAULT_ID_LEN) <= 0) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
goto err;
}
}
if (EVP_DigestSign(mctx, NULL, &siglen, out, outlen) <= 0) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
goto err;
}
sig = OPENSSL_malloc(siglen);
if (sig == NULL
|| EVP_DigestSign(mctx, sig, &siglen, out, outlen) <= 0) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
goto err;
}
if (!WPACKET_sub_memcpy_u16(pkt, sig, siglen)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
goto err;
}
/* Digest cached records and discard handshake buffer */
if (!ssl3_digest_cached_records(s, 0)) {
/* SSLfatal_ntls() already called */
goto err;
}
OPENSSL_free(sig);
EVP_MD_CTX_free(mctx);
EVP_MD_CTX_free(mctx2);
return 1;
err:
OPENSSL_free(sig);
EVP_MD_CTX_free(mctx);
EVP_MD_CTX_free(mctx2);
return 0;
}
MSG_PROCESS_RETURN tls_process_cert_verify_ntls(SSL *s, PACKET *pkt)
{
EVP_PKEY *pkey = NULL;
const unsigned char *data;
MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR;
int j;
unsigned int len;
X509 *peer;
const EVP_MD *md = NULL;
size_t hdatalen = 0;
void *hdata;
EVP_MD_CTX *mctx = EVP_MD_CTX_new();
EVP_MD_CTX *mctx2 = EVP_MD_CTX_new();
EVP_PKEY_CTX *pctx = NULL;
unsigned char out[EVP_MAX_MD_SIZE];
size_t outlen = 0;
if (mctx == NULL || mctx2 == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
goto err;
}
/* For NTLS server, s->session->peer stores the client signing certificate */
peer = s->session->peer;
pkey = X509_get0_pubkey(peer);
if (pkey == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
goto err;
}
if (ssl_cert_lookup_by_pkey(pkey, NULL) == NULL) {
SSLfatal_ntls(s, SSL_AD_ILLEGAL_PARAMETER,
SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE);
goto err;
}
if (!tls1_set_peer_legacy_sigalg(s, pkey)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
goto err;
}
if (!tls1_lookup_md(s->ctx, s->s3.tmp.peer_sigalg, &md)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
goto err;
}
if (!PACKET_get_net_2(pkt, &len)) {
SSLfatal_ntls(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH);
goto err;
}
if (!PACKET_get_bytes(pkt, &data, len)) {
SSLfatal_ntls(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH);
goto err;
}
if (!get_cert_verify_tbs_data_ntls(s, &hdata, &hdatalen)) {
/* SSLfatal_ntls() already called */
goto err;
}
OSSL_TRACE1(TLS, "Using client verify alg %s\n",
md == NULL ? "n/a" : EVP_MD_get0_name(md));
#ifndef OPENSSL_NO_SM2
if (EVP_PKEY_is_sm2(pkey)) {
if (!EVP_PKEY_set_alias_type(pkey, EVP_PKEY_SM2)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
goto err;
}
if (pkey != NULL) {
pctx = EVP_PKEY_CTX_new_from_pkey(s->ctx->libctx, pkey, s->ctx->propq);
if (pctx == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
goto err;
}
if (EVP_PKEY_CTX_set1_id(pctx, HANDSHAKE_SM2_ID,
HANDSHAKE_SM2_ID_LEN) != 1) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
goto err;
}
EVP_MD_CTX_set_pkey_ctx(mctx, pctx);
}
if (!EVP_PKEY_set_alias_type(pkey, EVP_PKEY_EC)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
goto err;
}
}
#endif
if (EVP_DigestVerifyInit_ex(mctx, &pctx,
md == NULL ? NULL : EVP_MD_get0_name(md),
s->ctx->libctx, s->ctx->propq, pkey,
NULL) <= 0) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
goto err;
}
if (!EVP_DigestInit_ex(mctx2, md, NULL)
|| !EVP_DigestUpdate(mctx2, hdata, hdatalen)
|| !EVP_DigestFinal(mctx2, out, (unsigned int *)&outlen)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
goto err;
}
if (EVP_PKEY_is_a(pkey, "SM2")) {
if (EVP_PKEY_CTX_set1_id(pctx, SM2_DEFAULT_ID, SM2_DEFAULT_ID_LEN) <= 0) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_EVP_LIB);
goto err;
}
}
j = EVP_DigestVerify(mctx, data, len, out, outlen);
if (j <= 0) {
SSLfatal_ntls(s, SSL_AD_DECRYPT_ERROR, SSL_R_BAD_SIGNATURE);
goto err;
}
ret = MSG_PROCESS_CONTINUE_READING;
err:
BIO_free(s->s3.handshake_buffer);
s->s3.handshake_buffer = NULL;
EVP_MD_CTX_free(mctx2);
EVP_MD_CTX_free(mctx);
#ifndef OPENSSL_NO_SM2
/*other sig call EVP_PKEY_CTX_free there may cause segfault */
if (pkey != NULL && EVP_PKEY_is_sm2(pkey))
EVP_PKEY_CTX_free(pctx);
#endif
return ret;
}
int tls_construct_finished_ntls(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;
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_ntls() 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_ntls(s, SSL_AD_INTERNAL_ERROR, 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_log_secret(s, MASTER_SECRET_LABEL,
s->session->master_key,
s->session->master_key_length)) {
/* SSLfatal_ntls() 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_ntls(s, SSL_AD_INTERNAL_ERROR, 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;
}
/*
* ssl3_take_mac_ntls calculates the Finished MAC for the handshakes messages seen
* to far.
*/
int ssl3_take_mac_ntls(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_ntls() already called */
return 0;
}
return 1;
}
MSG_PROCESS_RETURN tls_process_change_cipher_spec_ntls(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,
*/
if (remain != 0) {
SSLfatal_ntls(s, SSL_AD_DECODE_ERROR, 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_ntls(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_R_CCS_RECEIVED_EARLY);
return MSG_PROCESS_ERROR;
}
s->s3.change_cipher_spec = 1;
if (!ssl3_do_change_cipher_spec(s)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return MSG_PROCESS_ERROR;
}
return MSG_PROCESS_CONTINUE_READING;
}
MSG_PROCESS_RETURN tls_process_finished_ntls(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 this occurs, we have missed a message */
if (!s->s3.change_cipher_spec) {
SSLfatal_ntls(s, SSL_AD_UNEXPECTED_MESSAGE, 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_ntls(s, SSL_AD_DECODE_ERROR, 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_ntls(s, SSL_AD_DECRYPT_ERROR, 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_ntls(s, SSL_AD_INTERNAL_ERROR, 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;
}
return MSG_PROCESS_FINISHED_READING;
}
int tls_construct_change_cipher_spec_ntls(SSL *s, WPACKET *pkt)
{
if (!WPACKET_put_bytes_u8(pkt, SSL3_MT_CCS)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
return 1;
}
/* Add a certificate to the WPACKET */
static int ssl_add_cert_to_wpacket_ntls(SSL *s, WPACKET *pkt, X509 *x)
{
int len;
unsigned char *outbytes;
len = i2d_X509(x, NULL);
if (len < 0) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_BUF_LIB);
return 0;
}
if (!WPACKET_sub_allocate_bytes_u24(pkt, len, &outbytes)
|| i2d_X509(x, &outbytes) != len) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
return 1;
}
/* Add certificate chain to provided WPACKET */
static int ssl_add_cert_chain_ntls(SSL *s, WPACKET *pkt,
CERT_PKEY *a_cpk, CERT_PKEY *k_cpk)
{
int i, chain_count;
X509 *x;
STACK_OF(X509) *extra_certs;
STACK_OF(X509) *chain = NULL;
X509_STORE *chain_store;
if (a_cpk == NULL || a_cpk->x509 == NULL
|| k_cpk == NULL || k_cpk->x509 == NULL)
return 1;
if (a_cpk->chain != NULL)
extra_certs = a_cpk->chain;
else if (k_cpk->chain != NULL)
extra_certs = k_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_ex(s->ctx->libctx,
s->ctx->propq);
if (xs_ctx == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
return 0;
}
if (!X509_STORE_CTX_init(xs_ctx, chain_store,
a_cpk->x509, NULL)) {
X509_STORE_CTX_free(xs_ctx);
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, 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 */
ERR_raise(ERR_LIB_SSL, SSL_R_EE_KEY_TOO_SMALL);
ERR_raise(ERR_LIB_SSL, SSL_R_CA_KEY_TOO_SMALL);
ERR_raise(ERR_LIB_SSL, SSL_R_CA_MD_TOO_WEAK);
#endif
X509_STORE_CTX_free(xs_ctx);
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, i);
return 0;
}
/* add sign certificate */
if (!ssl_add_cert_to_wpacket_ntls(s, pkt, a_cpk->x509)) {
/* SSLfatal_ntls() already called */
X509_STORE_CTX_free(xs_ctx);
return 0;
}
/* add encryption certificate */
if (!ssl_add_cert_to_wpacket_ntls(s, pkt, k_cpk->x509)) {
/* SSLfatal_ntls() already called */
X509_STORE_CTX_free(xs_ctx);
return 0;
}
chain_count = sk_X509_num(chain);
for (i = 1; i < chain_count; i++) {
x = sk_X509_value(chain, i);
if (!ssl_add_cert_to_wpacket_ntls(s, pkt, x)) {
/* SSLfatal_ntls() 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, a_cpk->x509, 0);
if (i != 1) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, i);
return 0;
}
/* add sign certificate */
if (!ssl_add_cert_to_wpacket_ntls(s, pkt, a_cpk->x509)) {
/* SSLfatal_ntls() already called */
return 0;
}
/* add encryption certificate */
if (!ssl_add_cert_to_wpacket_ntls(s, pkt, k_cpk->x509)) {
/* SSLfatal_ntls() already called */
return 0;
}
/* output the following chain */
for (i = 0; i < sk_X509_num(extra_certs); i++) {
x = sk_X509_value(extra_certs, i);
if (!ssl_add_cert_to_wpacket_ntls(s, pkt, x)) {
/* SSLfatal_ntls() already called */
return 0;
}
}
}
return 1;
}
unsigned long ssl3_output_cert_chain_ntls(SSL *s, WPACKET *pkt,
CERT_PKEY *a_cpk,
CERT_PKEY *k_cpk)
{
if (!WPACKET_start_sub_packet_u24(pkt)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
if (!ssl_add_cert_chain_ntls(s, pkt, a_cpk, k_cpk))
return 0;
if (!WPACKET_close(pkt)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, 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_ntls(SSL *s, ossl_unused WORK_STATE wst,
int clearbufs, int stop)
{
void (*cb) (const SSL *ssl, int type, int val) = NULL;
int cleanuphand = s->statem.cleanuphand;
if (clearbufs) {
BUF_MEM_free(s->init_buf);
s->init_buf = NULL;
if (!ssl_free_wbio_buffer(s)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return WORK_ERROR;
}
s->init_num = 0;
}
/*
* 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) {
ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
/* N.B. s->ctx may not equal s->session_ctx */
ssl_tsan_counter(s->ctx, &s->ctx->stats.sess_accept_good);
s->handshake_func = ossl_statem_accept_ntls;
} else {
ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
if (s->hit)
ssl_tsan_counter(s->session_ctx,
&s->session_ctx->stats.sess_hit);
s->handshake_func = ossl_statem_connect_ntls;
ssl_tsan_counter(s->session_ctx,
&s->session_ctx->stats.sess_connect_good);
}
}
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_ntls(s, 0);
if (cb != NULL)
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_ntls(s, 1);
return WORK_FINISHED_CONTINUE;
}
return WORK_FINISHED_STOP;
}
int tls_get_message_header_ntls(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_ntls(s, SSL_AD_UNEXPECTED_MESSAGE,
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_ntls(s, SSL_AD_UNEXPECTED_MESSAGE,
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_ntls(s, SSL_AD_ILLEGAL_PARAMETER,
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_ntls(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_ntls(s)) {
/* SSLfatal_ntls() 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_ntls() 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
*/
#define SERVER_HELLO_RANDOM_OFFSET (SSL3_HM_HEADER_LENGTH + 2)
if (s->s3.tmp.message_type != SSL3_MT_SERVER_HELLO
|| s->init_num < SERVER_HELLO_RANDOM_OFFSET + SSL3_RANDOM_SIZE
|| memcmp(hrrrandom_ntls,
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_ntls() 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_EC_KEY_EXPLICIT_PARAMS, 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_ntls(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_ntls(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)
{
if (a == b)
return 0;
return a < b ? -1 : 1;
}
typedef struct {
int version;
const SSL_METHOD *(*cmeth) (void);
const SSL_METHOD *(*smeth) (void);
} version_info;
#if TLS_MAX_VERSION_INTERNAL != 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_NTLS
{NTLS_VERSION, ntls_client_method, ntls_server_method},
#else
{NTLS_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},
};
/*
* 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;
}
/*
* ssl_version_supported_ntls - 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_ntls(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;
}
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)) {
if (meth != NULL)
*meth = vent->cmeth();
return 1;
}
}
return 0;
}
/*
* ssl_check_version_downgrade_ntls - 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_ntls(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 {
/* 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_ntls - 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_ntls(int method_version, int version, int *bound)
{
int valid_tls;
if (version == 0) {
*bound = version;
return 1;
}
valid_tls = version >= NTLS_VERSION && version <= TLS_MAX_VERSION_INTERNAL;
if (!valid_tls)
return 0;
/*-
* Restrict TLS methods to TLS protocol versions.
*
* 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:
break;
case TLS_ANY_VERSION:
if (valid_tls)
*bound = version;
break;
}
return 1;
}
static void check_for_downgrade(SSL *s, int vers, DOWNGRADE *dgrd)
{
if (vers == TLS1_2_VERSION
&& ssl_version_supported_ntls(s, TLS1_3_VERSION, NULL)) {
*dgrd = DOWNGRADE_TO_1_2;
} else if (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_ntls(s, TLS1_2_VERSION, NULL)) {
*dgrd = DOWNGRADE_TO_1_1;
} else {
*dgrd = DOWNGRADE_NONE;
}
}
/*
* ssl_choose_server_version_ntls - 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_ntls(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_INTERNAL.
*
* 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;
s->client_version = client_version;
switch (server_version) {
default:
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;
}
/*
* 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_ntls - 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_ntls(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;
if (s->hello_retry_request != SSL_HRR_NONE
&& s->version != TLS1_3_VERSION) {
s->version = origv;
SSLfatal_ntls(s, SSL_AD_PROTOCOL_VERSION, SSL_R_WRONG_SSL_VERSION);
return 0;
}
switch (s->method->version) {
default:
if (s->version != s->method->version) {
s->version = origv;
SSLfatal_ntls(s, SSL_AD_PROTOCOL_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;
}
ret = ssl_get_min_max_version_ntls(s, &ver_min, &ver_max, &real_max);
if (ret != 0) {
s->version = origv;
SSLfatal_ntls(s, SSL_AD_PROTOCOL_VERSION, ret);
return 0;
}
if (s->version < ver_min) {
s->version = origv;
SSLfatal_ntls(s, SSL_AD_PROTOCOL_VERSION, SSL_R_UNSUPPORTED_PROTOCOL);
return 0;
} else if (s->version > ver_max) {
s->version = origv;
SSLfatal_ntls(s, SSL_AD_PROTOCOL_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_ntls(s, SSL_AD_ILLEGAL_PARAMETER,
SSL_R_INAPPROPRIATE_FALLBACK);
return 0;
}
} else if (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_ntls(s, SSL_AD_ILLEGAL_PARAMETER,
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_ntls(s, SSL_AD_PROTOCOL_VERSION, SSL_R_UNSUPPORTED_PROTOCOL);
return 0;
}
/*
* ssl_get_min_max_version_ntls - 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_ntls(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;
}
/*
* 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_ntls - 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_ntls(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_ntls(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 (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.
*/
int check_in_list_ntls(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_group_allowed(s, group, SSL_SECOP_CURVE_CHECK))) {
return 1;
}
}
return 0;
}
/* Replace ClientHello1 in the transcript hash with a synthetic message */
int create_synthetic_message_hash_ntls(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_ntls() already called */
return 0;
}
}
/* Reinitialise the transcript hash */
if (!ssl3_init_finished_mac(s)) {
/* SSLfatal_ntls() 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_ntls() 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_ntls() 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_ntls(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_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
goto err;
}
/* get the CA RDNs */
if (!PACKET_get_length_prefixed_2(pkt, &cadns)) {
SSLfatal_ntls(s, SSL_AD_DECODE_ERROR, 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_ntls(s, SSL_AD_DECODE_ERROR, SSL_R_LENGTH_MISMATCH);
goto err;
}
namestart = namebytes;
if ((xn = d2i_X509_NAME(NULL, &namebytes, name_len)) == NULL) {
SSLfatal_ntls(s, SSL_AD_DECODE_ERROR, ERR_R_ASN1_LIB);
goto err;
}
if (namebytes != (namestart + name_len)) {
SSLfatal_ntls(s, SSL_AD_DECODE_ERROR, SSL_R_CA_DN_LENGTH_MISMATCH);
goto err;
}
if (!sk_X509_NAME_push(ca_sk, xn)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, 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_ntls(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_ntls(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_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
if ((ca_sk != NULL) && !(s->options & SSL_OP_DISABLE_TLSEXT_CA_NAMES)) {
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_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
}
}
if (!WPACKET_close(pkt)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, 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_ntls(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_ntls(s, SSL_AD_INTERNAL_ERROR, 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_ntls(SSL *s)
{
if (s->pha_dgst == NULL) {
if (!ssl3_digest_cached_records(s, 1))
/* SSLfatal_ntls() already called */
return 0;
s->pha_dgst = EVP_MD_CTX_new();
if (s->pha_dgst == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
if (!EVP_MD_CTX_copy_ex(s->pha_dgst,
s->s3.handshake_dgst)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
EVP_MD_CTX_free(s->pha_dgst);
s->pha_dgst = NULL;
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_ntls(SSL *s)
{
if (s->pha_dgst == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
if (!EVP_MD_CTX_copy_ex(s->s3.handshake_dgst,
s->pha_dgst)) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
return 1;
}
unsigned char *x509_to_asn1_ntls(const X509 *x, size_t *len)
{
unsigned char *buf = NULL;
unsigned char *p;
size_t buflen;
int n;
if (x == NULL || len == NULL)
return NULL;
if ((n = i2d_X509(x, NULL)) <= 0)
return NULL;
/* opaque ASN.1Cert<1..2^24-1> */
buflen = n + 3;
buf = OPENSSL_malloc(buflen);
if (buf == NULL)
return NULL;
p = buf + 3;
if ((n = i2d_X509(x, &p)) <= 0) {
OPENSSL_free(buf);
return NULL;
}
l2n3(n, buf);
buf -= 3;
*len = n + 3;
return buf;
}
int ssl_derive_ntls(SSL *s, EVP_PKEY *privkey, EVP_PKEY *pubkey, int gensecret)
{
int rv = 0;
int idx = 1;
X509 *peer_x509 = NULL;
EVP_PKEY *peer_cert_pub = NULL;
EVP_PKEY *cert_priv = NULL;
unsigned char *pms = NULL;
size_t pmslen = SSL_MAX_MASTER_KEY_LENGTH;
EVP_PKEY_CTX *pctx = NULL;
OSSL_PARAM params[8], *p = params;
if (privkey == NULL || pubkey == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
/* SM2 requires to use the private key in encryption certificate */
cert_priv = s->cert->pkeys[SSL_PKEY_SM2_ENC].privatekey;
if (cert_priv == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
/*
* XXX:
*
* For NTLS server side, s->session->peer stores the client signing
* certificate and s->session->peer_chain is an one-item stack which
* stores the client encryption certificate.
*
* We need to get the client encryption certificate at this stage,
* so we use index 0 in peer_chain.
*
* For client side of NTLS, the peer is an reference of the first element
* of the two-item stack stored in s->session->peer_chain, which is the
* signing certificate of server. So we need to get the second certificate
* in this scenario for encryption usage.
*/
if (s->server)
idx = 0;
if (s->session->peer_chain == NULL
|| (peer_x509 = sk_X509_value(s->session->peer_chain, idx)) == NULL
|| (peer_cert_pub = X509_get0_pubkey(peer_x509)) == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return 0;
}
pms = OPENSSL_malloc(pmslen);
if (pms == NULL) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
goto err;
}
pctx = EVP_PKEY_CTX_new_from_pkey(s->ctx->libctx, privkey, s->ctx->propq);
/* for NTLS, server is initiator(Z_A), client is responder(Z_B) */
*p++ = OSSL_PARAM_construct_int(OSSL_EXCHANGE_PARAM_INITIATOR,
&s->server);
*p++ = OSSL_PARAM_construct_octet_string(OSSL_EXCHANGE_PARAM_SELF_ID,
SM2_DEFAULT_ID,
SM2_DEFAULT_ID_LEN);
*p++ = OSSL_PARAM_construct_octet_string(OSSL_EXCHANGE_PARAM_PEER_ID,
SM2_DEFAULT_ID,
SM2_DEFAULT_ID_LEN);
*p++ = OSSL_PARAM_construct_octet_ptr(OSSL_EXCHANGE_PARAM_SELF_ENC_KEY,
(void **)&cert_priv,
sizeof(cert_priv));
*p++ = OSSL_PARAM_construct_octet_ptr(OSSL_EXCHANGE_PARAM_PEER_ENC_KEY,
(void **)&peer_cert_pub,
sizeof(peer_cert_pub));
*p++ = OSSL_PARAM_construct_utf8_string(OSSL_EXCHANGE_PARAM_DIGEST,
"SM3", 0);
*p++ = OSSL_PARAM_construct_size_t(OSSL_EXCHANGE_PARAM_OUTLEN, &pmslen);
*p = OSSL_PARAM_construct_end();
if (EVP_PKEY_derive_init_ex(pctx, params) <= 0
|| EVP_PKEY_derive_set_peer(pctx, pubkey) <= 0
|| EVP_PKEY_derive(pctx, pms, &pmslen) <= 0) {
SSLfatal_ntls(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
goto err;
}
if (gensecret) {
rv = ssl_gensecret(s, pms, pmslen);
} else {
/* Save premaster secret */
s->s3.tmp.pms = pms;
s->s3.tmp.pmslen = pmslen;
pms = NULL;
rv = 1;
}
err:
OPENSSL_clear_free(pms, pmslen);
EVP_PKEY_CTX_free(pctx);
return rv;
}
int SSL_connection_is_ntls(SSL *s, int is_server)
{
int ret = 0;
unsigned int version;
uint8_t *p, *data = NULL;
/*
* For client, or sometimes ssl_version is fixed,
* we can easily determine if version is NTLS
*/
if (s->version == NTLS1_1_VERSION)
return 1;
if (is_server) {
/* After receiving client hello and before choosing server version,
* get version from s->clienthello->legacy_version
*/
if (s->clienthello)
return s->clienthello->legacy_version == NTLS1_1_VERSION;
if (s->preread_len >= sizeof(s->preread_buf)) {
p = &s->preread_buf[1];
n2s(p, version);
return version == NTLS1_1_VERSION;
}
/*
* For server, first flight has not set version, we
* have to get the server version from clientHello
*/
if (!SSL_IS_FIRST_HANDSHAKE(s) || !SSL_in_before(s))
return 0;
if (s->rbio == NULL) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_R_READ_BIO_NOT_SET);
return -1;
}
data = s->preread_buf + s->preread_len;
clear_sys_error();
s->rwstate = SSL_READING;
ret = BIO_read(s->rbio, data, sizeof(s->preread_buf) - s->preread_len);
if (ret <= 0 && !BIO_should_retry(s->rbio) && BIO_eof(s->rbio)) {
if (s->options & SSL_OP_IGNORE_UNEXPECTED_EOF) {
SSL_set_shutdown(s, SSL_RECEIVED_SHUTDOWN);
s->s3.warn_alert = SSL_AD_CLOSE_NOTIFY;
} else {
SSLfatal(s, SSL_AD_DECODE_ERROR,
SSL_R_UNEXPECTED_EOF_WHILE_READING);
}
return -1;
}
if (ret > 0)
s->preread_len += ret;
if (s->preread_len >= sizeof(s->preread_buf)) {
BIO *bbio = BIO_new(BIO_f_buffer());
if (bbio == NULL) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_MALLOC_FAILURE);
return -1;
}
if (BIO_set_buffer_read_data(bbio, s->preread_buf,
sizeof(s->preread_buf))
!= 1) {
BIO_vfree(bbio);
SSLfatal(s, SSL_AD_INTERNAL_ERROR, ERR_R_INTERNAL_ERROR);
return -1;
}
s->rwstate = SSL_NOTHING;
s->rbio = BIO_push(bbio, s->rbio);
p = &s->preread_buf[1];
n2s(p, version);
return version == NTLS1_1_VERSION;
}
return -1;
}
return 0;
}
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