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OpenSSL 1.1.1-pre2

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This commit is contained in:
Hakase
2018-04-07 17:29:40 +09:00
parent 82a44d2483
commit bbac8ca55d
17755 changed files with 221242 additions and 98415 deletions
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ssl/statem/statem_lib.c
+1431 -233
View File
@@ -1,5 +1,6 @@
/*
* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
@@ -7,22 +8,24 @@
* https://www.openssl.org/source/license.html
*/
/* ====================================================================
* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
* ECC cipher suite support in OpenSSL originally developed by
* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
#include <limits.h>
#include <string.h>
#include <stdio.h>
#include "../ssl_locl.h"
#include "statem_locl.h"
#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
/* Fixed value used in the ServerHello random field to identify an HRR */
const unsigned char hrrrandom[] = {
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)
@@ -30,71 +33,619 @@
int ssl3_do_write(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);
s->init_num, &written);
if (ret < 0)
return (-1);
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
* TLS1.3 KeyUpdate and NewSessionTicket do not need to be added
*/
if (!ssl3_finish_mac(s,
(unsigned char *)&s->init_buf->data[s->init_off],
ret))
return -1;
if (ret == s->init_num) {
if (!SSL_IS_TLS13(s) || (s->statem.hand_state != TLS_ST_SW_SESSION_TICKET
&& s->statem.hand_state != TLS_ST_CW_KEY_UPDATE
&& s->statem.hand_state != TLS_ST_SW_KEY_UPDATE))
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);
return 1;
}
s->init_off += ret;
s->init_num -= ret;
return (0);
s->init_off += written;
s->init_num -= written;
return 0;
}
int tls_construct_finished(SSL *s, const char *sender, int slen)
int tls_close_construct_packet(SSL *s, WPACKET *pkt, int htype)
{
unsigned char *p;
int i;
unsigned long l;
size_t msglen;
p = ssl_handshake_start(s);
i = s->method->ssl3_enc->final_finish_mac(s,
sender, slen,
s->s3->tmp.finish_md);
if (i <= 0)
if ((htype != SSL3_MT_CHANGE_CIPHER_SPEC && !WPACKET_close(pkt))
|| !WPACKET_get_length(pkt, &msglen)
|| msglen > INT_MAX)
return 0;
s->s3->tmp.finish_md_len = i;
memcpy(p, s->s3->tmp.finish_md, i);
l = i;
s->init_num = (int)msglen;
s->init_off = 0;
return 1;
}
int tls_setup_handshake(SSL *s)
{
if (!ssl3_init_finished_mac(s)) {
/* SSLfatal() already called */
return 0;
}
/* Reset any extension flags */
memset(s->ext.extflags, 0, sizeof(s->ext.extflags));
if (s->server) {
STACK_OF(SSL_CIPHER) *ciphers = SSL_get_ciphers(s);
int i, ver_min, ver_max, ok = 0;
/*
* Sanity check that the maximum version we accept has ciphers
* enabled. For clients we do this check during construction of the
* ClientHello.
*/
if (ssl_get_min_max_version(s, &ver_min, &ver_max) != 0) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_SETUP_HANDSHAKE,
ERR_R_INTERNAL_ERROR);
return 0;
}
for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
if (SSL_IS_DTLS(s)) {
if (DTLS_VERSION_GE(ver_max, c->min_dtls) &&
DTLS_VERSION_LE(ver_max, c->max_dtls))
ok = 1;
} else if (ver_max >= c->min_tls && ver_max <= c->max_tls) {
ok = 1;
}
if (ok)
break;
}
if (!ok) {
SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_SETUP_HANDSHAKE,
SSL_R_NO_CIPHERS_AVAILABLE);
ERR_add_error_data(1, "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 */
CRYPTO_atomic_add(&s->session_ctx->stats.sess_accept, 1, &i,
s->session_ctx->lock);
} else {
/* N.B. s->ctx may not equal s->session_ctx */
CRYPTO_atomic_add(&s->ctx->stats.sess_accept_renegotiate, 1, &i,
s->ctx->lock);
s->s3->tmp.cert_request = 0;
}
} else {
int discard;
if (SSL_IS_FIRST_HANDSHAKE(s))
CRYPTO_atomic_add(&s->session_ctx->stats.sess_connect, 1, &discard,
s->session_ctx->lock);
else
CRYPTO_atomic_add(&s->session_ctx->stats.sess_connect_renegotiate,
1, &discard, s->session_ctx->lock);
/* mark client_random uninitialized */
memset(s->s3->client_random, 0, sizeof(s->s3->client_random));
s->hit = 0;
s->s3->tmp.cert_req = 0;
if (SSL_IS_DTLS(s))
s->statem.use_timer = 1;
}
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(SSL *s, unsigned char *tls13tbs,
void **hdata, size_t *hdatalen)
{
static const char *servercontext = "TLS 1.3, server CertificateVerify";
static const char *clientcontext = "TLS 1.3, client CertificateVerify";
if (SSL_IS_TLS13(s)) {
size_t hashlen;
/* Set the first 64 bytes of to-be-signed data to octet 32 */
memset(tls13tbs, 32, TLS13_TBS_START_SIZE);
/* This copies the 33 bytes of context plus the 0 separator byte */
if (s->statem.hand_state == TLS_ST_CR_CERT_VRFY
|| s->statem.hand_state == TLS_ST_SW_CERT_VRFY)
strcpy((char *)tls13tbs + TLS13_TBS_START_SIZE, servercontext);
else
strcpy((char *)tls13tbs + TLS13_TBS_START_SIZE, clientcontext);
/*
* If we're currently reading then we need to use the saved handshake
* hash value. We can't use the current handshake hash state because
* that includes the CertVerify itself.
*/
if (s->statem.hand_state == TLS_ST_CR_CERT_VRFY
|| s->statem.hand_state == TLS_ST_SR_CERT_VRFY) {
memcpy(tls13tbs + TLS13_TBS_PREAMBLE_SIZE, s->cert_verify_hash,
s->cert_verify_hash_len);
hashlen = s->cert_verify_hash_len;
} else if (!ssl_handshake_hash(s, tls13tbs + TLS13_TBS_PREAMBLE_SIZE,
EVP_MAX_MD_SIZE, &hashlen)) {
/* SSLfatal() already called */
return 0;
}
*hdata = tls13tbs;
*hdatalen = TLS13_TBS_PREAMBLE_SIZE + hashlen;
} else {
size_t retlen;
retlen = BIO_get_mem_data(s->s3->handshake_buffer, hdata);
if (retlen <= 0) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_GET_CERT_VERIFY_TBS_DATA,
ERR_R_INTERNAL_ERROR);
return 0;
}
*hdatalen = retlen;
}
return 1;
}
int tls_construct_cert_verify(SSL *s, WPACKET *pkt)
{
EVP_PKEY *pkey = NULL;
const EVP_MD *md = NULL;
EVP_MD_CTX *mctx = NULL;
EVP_PKEY_CTX *pctx = NULL;
size_t hdatalen = 0, siglen = 0;
void *hdata;
unsigned char *sig = NULL;
unsigned char tls13tbs[TLS13_TBS_PREAMBLE_SIZE + EVP_MAX_MD_SIZE];
const SIGALG_LOOKUP *lu = s->s3->tmp.sigalg;
if (lu == NULL || s->s3->tmp.cert == NULL) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
ERR_R_INTERNAL_ERROR);
goto err;
}
pkey = s->s3->tmp.cert->privatekey;
if (pkey == NULL || !tls1_lookup_md(lu, &md)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
ERR_R_INTERNAL_ERROR);
goto err;
}
mctx = EVP_MD_CTX_new();
if (mctx == NULL) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
ERR_R_MALLOC_FAILURE);
goto err;
}
/* Get the data to be signed */
if (!get_cert_verify_tbs_data(s, tls13tbs, &hdata, &hdatalen)) {
/* SSLfatal() already called */
goto err;
}
if (SSL_USE_SIGALGS(s) && !WPACKET_put_bytes_u16(pkt, lu->sigalg)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
ERR_R_INTERNAL_ERROR);
goto err;
}
siglen = EVP_PKEY_size(pkey);
sig = OPENSSL_malloc(siglen);
if (sig == NULL) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
ERR_R_MALLOC_FAILURE);
goto err;
}
if (EVP_DigestSignInit(mctx, &pctx, md, NULL, pkey) <= 0) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
ERR_R_EVP_LIB);
goto err;
}
if (lu->sig == EVP_PKEY_RSA_PSS) {
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_CONSTRUCT_CERT_VERIFY,
ERR_R_EVP_LIB);
goto err;
}
}
if (s->version == SSL3_VERSION) {
if (EVP_DigestSignUpdate(mctx, hdata, hdatalen) <= 0
|| !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
(int)s->session->master_key_length,
s->session->master_key)
|| EVP_DigestSignFinal(mctx, sig, &siglen) <= 0) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
ERR_R_EVP_LIB);
goto err;
}
} else if (EVP_DigestSign(mctx, sig, &siglen, hdata, hdatalen) <= 0) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
ERR_R_EVP_LIB);
goto err;
}
#ifndef OPENSSL_NO_GOST
{
int pktype = lu->sig;
if (pktype == NID_id_GostR3410_2001
|| pktype == NID_id_GostR3410_2012_256
|| pktype == NID_id_GostR3410_2012_512)
BUF_reverse(sig, NULL, siglen);
}
#endif
if (!WPACKET_sub_memcpy_u16(pkt, sig, siglen)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_VERIFY,
ERR_R_INTERNAL_ERROR);
goto err;
}
/* Digest cached records and discard handshake buffer */
if (!ssl3_digest_cached_records(s, 0)) {
/* SSLfatal() already called */
goto err;
}
OPENSSL_free(sig);
EVP_MD_CTX_free(mctx);
return 1;
err:
OPENSSL_free(sig);
EVP_MD_CTX_free(mctx);
return 0;
}
MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt)
{
EVP_PKEY *pkey = NULL;
const unsigned char *data;
#ifndef OPENSSL_NO_GOST
unsigned char *gost_data = NULL;
#endif
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;
unsigned char tls13tbs[TLS13_TBS_PREAMBLE_SIZE + EVP_MAX_MD_SIZE];
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;
}
#ifdef SSL_DEBUG
fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
#endif
} 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;
}
/* 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", 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;
}
}
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 (!s->server) {
OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i);
s->s3->previous_client_finished_len = i;
} else {
OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i);
s->s3->previous_server_finished_len = i;
}
if (!ssl_set_handshake_header(s, SSL3_MT_FINISHED, l)) {
SSLerr(SSL_F_TLS_CONSTRUCT_FINISHED, ERR_R_INTERNAL_ERROR);
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;
s->key_update_count++;
if (s->key_update_count > MAX_KEY_UPDATE_MESSAGES) {
SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_KEY_UPDATE,
SSL_R_TOO_MANY_KEY_UPDATES);
return MSG_PROCESS_ERROR;
}
/*
* 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).
*/
if (updatetype == SSL_KEY_UPDATE_REQUESTED)
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.
@@ -102,7 +653,7 @@ int tls_construct_finished(SSL *s, const char *sender, int slen)
int ssl3_take_mac(SSL *s)
{
const char *sender;
int slen;
size_t slen;
if (!s->server) {
sender = s->method->ssl3_enc->server_finished_label;
@@ -117,7 +668,7 @@ int ssl3_take_mac(SSL *s)
s->s3->tmp.peer_finish_md);
if (s->s3->tmp.peer_finish_md_len == 0) {
SSLerr(SSL_F_SSL3_TAKE_MAC, ERR_R_INTERNAL_ERROR);
/* SSLfatal() already called */
return 0;
}
@@ -126,8 +677,7 @@ int ssl3_take_mac(SSL *s)
MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt)
{
int al;
long remain;
size_t remain;
remain = PACKET_remaining(pkt);
/*
@@ -140,32 +690,32 @@ MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt)
&& remain != DTLS1_CCS_HEADER_LENGTH + 1)
|| (s->version != DTLS1_BAD_VER
&& remain != DTLS1_CCS_HEADER_LENGTH - 1)) {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
SSL_R_BAD_CHANGE_CIPHER_SPEC);
goto f_err;
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) {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC,
SSL_R_BAD_CHANGE_CIPHER_SPEC);
goto f_err;
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) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, SSL_R_CCS_RECEIVED_EARLY);
goto f_err;
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)) {
al = SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR);
goto f_err;
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)) {
@@ -185,127 +735,334 @@ MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt)
}
return MSG_PROCESS_CONTINUE_READING;
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
ossl_statem_set_error(s);
return MSG_PROCESS_ERROR;
}
MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt)
{
int al, i;
size_t md_len;
/* This is a real handshake so make sure we clean it up at the end */
if (s->server) {
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 (!s->s3->change_cipher_spec) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
goto f_err;
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;
i = s->s3->tmp.peer_finish_md_len;
md_len = s->s3->tmp.peer_finish_md_len;
if ((unsigned long)i != PACKET_remaining(pkt)) {
al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_BAD_DIGEST_LENGTH);
goto f_err;
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, i) != 0) {
al = SSL_AD_DECRYPT_ERROR;
SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_DIGEST_CHECK_FAILED);
goto f_err;
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) {
OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i);
s->s3->previous_client_finished_len = i;
memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md,
md_len);
s->s3->previous_client_finished_len = md_len;
} else {
OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i);
s->s3->previous_server_finished_len = i;
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;
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
ossl_statem_set_error(s);
return MSG_PROCESS_ERROR;
}
int tls_construct_change_cipher_spec(SSL *s)
int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt)
{
unsigned char *p;
p = (unsigned char *)s->init_buf->data;
*p = SSL3_MT_CCS;
s->init_num = 1;
s->init_off = 0;
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;
}
unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk)
/* Add a certificate to the WPACKET */
static int ssl_add_cert_to_wpacket(SSL *s, WPACKET *pkt, X509 *x, int chain)
{
unsigned char *p;
unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s);
int len;
unsigned char *outbytes;
if (!ssl_add_cert_chain(s, cpk, &l))
return 0;
l -= 3 + SSL_HM_HEADER_LENGTH(s);
p = ssl_handshake_start(s);
l2n3(l, p);
l += 3;
if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l)) {
SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR);
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;
}
return l + SSL_HM_HEADER_LENGTH(s);
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;
}
WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst)
/* Add certificate chain to provided WPACKET */
static int ssl_add_cert_chain(SSL *s, WPACKET *pkt, CERT_PKEY *cpk)
{
void (*cb) (const SSL *ssl, int type, int val) = NULL;
int i, chain_count;
X509 *x;
STACK_OF(X509) *extra_certs;
STACK_OF(X509) *chain = NULL;
X509_STORE *chain_store;
/* clean a few things up */
ssl3_cleanup_key_block(s);
if (cpk == NULL || cpk->x509 == NULL)
return 1;
if (!SSL_IS_DTLS(s)) {
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;
}
/*
* We don't do this in DTLS because we may still need the init_buf
* in case there are any unexpected retransmits
* 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
*/
BUF_MEM_free(s->init_buf);
s->init_buf = NULL;
(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;
}
ssl_free_wbio_buffer(s);
if (!ssl_add_cert_chain(s, pkt, cpk))
return 0;
s->init_num = 0;
if (!WPACKET_close(pkt)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_OUTPUT_CERT_CHAIN,
ERR_R_INTERNAL_ERROR);
return 0;
}
if (!s->server || s->renegotiate == 2) {
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)
{
int discard;
void (*cb) (const SSL *ssl, int type, int val) = NULL;
#ifndef OPENSSL_NO_SCTP
if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))) {
WORK_STATE ret;
ret = dtls_wait_for_dry(s);
if (ret != WORK_FINISHED_CONTINUE)
return ret;
}
#endif
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;
if (s->statem.cleanuphand) {
/* skipped if we just sent a HelloRequest */
s->renegotiate = 0;
s->new_session = 0;
s->statem.cleanuphand = 0;
ssl3_cleanup_key_block(s);
if (s->server) {
ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
s->ctx->stats.sess_accept_good++;
/* N.B. s->ctx may not equal s->session_ctx */
CRYPTO_atomic_add(&s->ctx->stats.sess_accept_good, 1, &discard,
s->ctx->lock);
s->handshake_func = ossl_statem_accept;
} else {
ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
/*
* In TLSv1.3 we update the cache as part of processing the
* NewSessionTicket
*/
if (!SSL_IS_TLS13(s))
ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
if (s->hit)
s->ctx->stats.sess_hit++;
CRYPTO_atomic_add(&s->session_ctx->stats.sess_hit, 1, &discard,
s->session_ctx->lock);
s->handshake_func = ossl_statem_connect;
s->ctx->stats.sess_connect_good++;
CRYPTO_atomic_add(&s->session_ctx->stats.sess_connect_good, 1,
&discard, s->session_ctx->lock);
}
if (s->info_callback != NULL)
@@ -325,15 +1082,19 @@ WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst)
}
}
if (!stop)
return WORK_FINISHED_CONTINUE;
ossl_statem_set_in_init(s, 0);
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, al;
int skip_message, i, recvd_type;
unsigned char *p;
unsigned long l;
size_t l, readbytes;
p = (unsigned char *)s->init_buf->data;
@@ -342,7 +1103,7 @@ int tls_get_message_header(SSL *s, int *mt)
i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &recvd_type,
&p[s->init_num],
SSL3_HM_HEADER_LENGTH - s->init_num,
0);
0, &readbytes);
if (i <= 0) {
s->rwstate = SSL_READING;
return 0;
@@ -352,28 +1113,41 @@ int tls_get_message_header(SSL *s, int *mt)
* A ChangeCipherSpec must be a single byte and may not occur
* in the middle of a handshake message.
*/
if (s->init_num != 0 || i != 1 || p[0] != SSL3_MT_CCS) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER,
SSL_R_BAD_CHANGE_CIPHER_SPEC);
goto f_err;
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 = i - 1;
s->init_num = readbytes - 1;
s->init_msg = s->init_buf->data;
s->s3->tmp.message_size = i;
s->s3->tmp.message_size = readbytes;
return 1;
} else if (recvd_type != SSL3_RT_HANDSHAKE) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_CCS_RECEIVED_EARLY);
goto f_err;
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE,
SSL_F_TLS_GET_MESSAGE_HEADER,
SSL_R_CCS_RECEIVED_EARLY);
return 0;
}
s->init_num += i;
s->init_num += readbytes;
}
skip_message = 0;
if (!s->server)
if (p[0] == SSL3_MT_HELLO_REQUEST)
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
@@ -413,9 +1187,9 @@ int tls_get_message_header(SSL *s, int *mt)
n2l3(p, l);
/* BUF_MEM_grow takes an 'int' parameter */
if (l > (INT_MAX - SSL3_HM_HEADER_LENGTH)) {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_EXCESSIVE_MESSAGE_SIZE);
goto f_err;
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;
@@ -424,14 +1198,11 @@ int tls_get_message_header(SSL *s, int *mt)
}
return 1;
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
return 0;
}
int tls_get_message_body(SSL *s, unsigned long *len)
int tls_get_message_body(SSL *s, size_t *len)
{
long n;
size_t n, readbytes;
unsigned char *p;
int i;
@@ -445,14 +1216,14 @@ int tls_get_message_body(SSL *s, unsigned long *len)
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);
&p[s->init_num], n, 0, &readbytes);
if (i <= 0) {
s->rwstate = SSL_READING;
*len = 0;
return 0;
}
s->init_num += i;
n -= i;
s->init_num += readbytes;
n -= readbytes;
}
/*
@@ -469,8 +1240,7 @@ int tls_get_message_body(SSL *s, unsigned long *len)
if (RECORD_LAYER_is_sslv2_record(&s->rlayer)) {
if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
s->init_num)) {
SSLerr(SSL_F_TLS_GET_MESSAGE_BODY, ERR_R_EVP_LIB);
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
/* SSLfatal() already called */
*len = 0;
return 0;
}
@@ -478,12 +1248,28 @@ int tls_get_message_body(SSL *s, unsigned long *len)
s->msg_callback(0, SSL2_VERSION, 0, s->init_buf->data,
(size_t)s->init_num, s, s->msg_callback_arg);
} else {
if (!ssl3_finish_mac(s, (unsigned char *)s->init_buf->data,
s->init_num + SSL3_HM_HEADER_LENGTH)) {
SSLerr(SSL_F_TLS_GET_MESSAGE_BODY, ERR_R_EVP_LIB);
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
*len = 0;
return 0;
/*
* 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,
@@ -491,47 +1277,10 @@ int tls_get_message_body(SSL *s, unsigned long *len)
s->msg_callback_arg);
}
/*
* init_num should never be negative...should probably be declared
* unsigned
*/
if (s->init_num < 0) {
SSLerr(SSL_F_TLS_GET_MESSAGE_BODY, ERR_R_INTERNAL_ERROR);
ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
*len = 0;
return 0;
}
*len = (unsigned long)s->init_num;
*len = s->init_num;
return 1;
}
int ssl_cert_type(const X509 *x, const EVP_PKEY *pk)
{
if (pk == NULL && (pk = X509_get0_pubkey(x)) == NULL)
return -1;
switch (EVP_PKEY_id(pk)) {
default:
return -1;
case EVP_PKEY_RSA:
return SSL_PKEY_RSA_ENC;
case EVP_PKEY_DSA:
return SSL_PKEY_DSA_SIGN;
#ifndef OPENSSL_NO_EC
case EVP_PKEY_EC:
return SSL_PKEY_ECC;
#endif
#ifndef OPENSSL_NO_GOST
case NID_id_GostR3410_2001:
return SSL_PKEY_GOST01;
case NID_id_GostR3410_2012_256:
return SSL_PKEY_GOST12_256;
case NID_id_GostR3410_2012_512:
return SSL_PKEY_GOST12_512;
#endif
}
}
int ssl_verify_alarm_type(long type)
{
int al;
@@ -598,7 +1347,7 @@ int ssl_verify_alarm_type(long type)
al = SSL_AD_CERTIFICATE_UNKNOWN;
break;
}
return (al);
return al;
}
int ssl_allow_compression(SSL *s)
@@ -625,11 +1374,17 @@ typedef struct {
const SSL_METHOD *(*smeth) (void);
} version_info;
#if TLS_MAX_VERSION != TLS1_2_VERSION
# error Code needs update for TLS_method() support beyond TLS1_2_VERSION.
#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
@@ -657,6 +1412,7 @@ static const version_info tls_version_table[] = {
# 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},
@@ -698,8 +1454,6 @@ static int ssl_method_error(const SSL *s, const SSL_METHOD *method)
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;
else if ((method->flags & SSL_METHOD_NO_FIPS) != 0 && FIPS_mode())
return SSL_R_AT_LEAST_TLS_1_0_NEEDED_IN_FIPS_MODE;
return 0;
}
@@ -841,6 +1595,20 @@ int ssl_set_version_bound(int method_version, int version, int *bound)
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)) {
*dgrd = DOWNGRADE_TO_1_2;
} else if (!SSL_IS_DTLS(s) && vers < TLS1_2_VERSION
&& (ssl_version_supported(s, TLS1_2_VERSION)
|| ssl_version_supported(s, TLS1_3_VERSION))) {
*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
@@ -850,7 +1618,7 @@ int ssl_set_version_bound(int method_version, int version, int *bound)
*
* Returns 0 on success or an SSL error reason number on failure.
*/
int ssl_choose_server_version(SSL *s)
int ssl_choose_server_version(SSL *s, CLIENTHELLO_MSG *hello, DOWNGRADE *dgrd)
{
/*-
* With version-flexible methods we have an initial state with:
@@ -862,23 +1630,34 @@ int ssl_choose_server_version(SSL *s)
* handle version.
*/
int server_version = s->method->version;
int client_version = s->client_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 (version_cmp(s, client_version, s->version) < 0)
return SSL_R_WRONG_SSL_VERSION;
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;
}
/*
* 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)
* Fall through if we are TLSv1.3 already (this means we must be after
* a HelloRetryRequest
*/
return 0;
/* fall thru */
case TLS_ANY_VERSION:
table = tls_version_table;
break;
@@ -887,6 +1666,84 @@ int ssl_choose_server_version(SSL *s)
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;
}
while (PACKET_get_net_2(&versionslist, &candidate_vers)) {
/* TODO(TLS1.3): Remove this before release */
if (candidate_vers == TLS1_3_VERSION_DRAFT)
candidate_vers = TLS1_3_VERSION;
/*
* TODO(TLS1.3): There is some discussion on the TLS list about
* whether to ignore versions <TLS1.2 in supported_versions. At the
* moment we honour them if present. To be reviewed later
*/
if (version_cmp(s, candidate_vers, best_vers) <= 0)
continue;
for (vent = table;
vent->version != 0 && vent->version != (int)candidate_vers;
++vent)
continue;
if (vent->version != 0 && vent->smeth != NULL) {
const SSL_METHOD *method;
method = vent->smeth();
if (ssl_method_error(s, method) == 0) {
best_vers = candidate_vers;
best_method = method;
}
}
}
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;
@@ -895,6 +1752,7 @@ int ssl_choose_server_version(SSL *s)
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;
@@ -911,18 +1769,46 @@ int ssl_choose_server_version(SSL *s)
*
* @s: client SSL handle.
* @version: The proposed version from the server's HELLO.
* @extensions: The extensions received
*
* Returns 0 on success or an SSL error reason number on failure.
* Returns 1 on success or 0 on error.
*/
int ssl_choose_client_version(SSL *s, int version)
int ssl_choose_client_version(SSL *s, int version, RAW_EXTENSION *extensions)
{
const version_info *vent;
const version_info *table;
int highver = 0;
int 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 (version != s->version)
return SSL_R_WRONG_SSL_VERSION;
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
@@ -930,7 +1816,7 @@ int ssl_choose_client_version(SSL *s, int version)
* versions they don't want. If not, then easy to fix, just return
* ssl_method_error(s, s->method)
*/
return 0;
return 1;
case TLS_ANY_VERSION:
table = tls_version_table;
break;
@@ -943,24 +1829,71 @@ int ssl_choose_client_version(SSL *s, int version)
const SSL_METHOD *method;
int err;
if (version != vent->version)
continue;
if (vent->cmeth == NULL)
break;
continue;
if (highver != 0 && s->version != vent->version)
continue;
method = vent->cmeth();
err = ssl_method_error(s, method);
if (err != 0)
return err;
if (err != 0) {
if (s->version == vent->version) {
s->version = origv;
SSLfatal(s, SSL_AD_PROTOCOL_VERSION,
SSL_F_SSL_CHOOSE_CLIENT_VERSION, err);
return 0;
}
continue;
}
if (highver == 0)
highver = vent->version;
if (s->version != vent->version)
continue;
#ifndef OPENSSL_NO_TLS13DOWNGRADE
/* Check for downgrades */
if (s->version == TLS1_2_VERSION && highver > 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
&& highver > 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;
}
}
#endif
s->method = method;
s->version = version;
return 0;
return 1;
}
return SSL_R_UNSUPPORTED_PROTOCOL;
s->version = origv;
SSLfatal(s, SSL_AD_PROTOCOL_VERSION, SSL_F_SSL_CHOOSE_CLIENT_VERSION,
SSL_R_UNSUPPORTED_PROTOCOL);
return 0;
}
/*
* ssl_get_client_min_max_version - get minimum and maximum client version
* 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
@@ -968,7 +1901,7 @@ int ssl_choose_client_version(SSL *s, int version)
* 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
* or FIPS_mode() constraints and any floor imposed by the security level here,
* 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,
@@ -978,8 +1911,7 @@ int ssl_choose_client_version(SSL *s, int version)
* 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_client_min_max_version(const SSL *s, int *min_version,
int *max_version)
int ssl_get_min_max_version(const SSL *s, int *min_version, int *max_version)
{
int version;
int hole;
@@ -1063,7 +1995,7 @@ int ssl_get_client_min_max_version(const SSL *s, int *min_version,
/*
* ssl_set_client_hello_version - Work out what version we should be using for
* the initial ClientHello.
* the initial ClientHello.legacy_version field.
*
* @s: client SSL handle.
*
@@ -1073,11 +2005,277 @@ int ssl_set_client_hello_version(SSL *s)
{
int ver_min, ver_max, ret;
ret = ssl_get_client_min_max_version(s, &ver_min, &ver_max);
ret = ssl_get_min_max_version(s, &ver_min, &ver_max);
if (ret != 0)
return ret;
s->client_version = s->version = ver_max;
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;
}
int construct_ca_names(SSL *s, WPACKET *pkt)
{
const STACK_OF(X509_NAME) *ca_sk = SSL_get0_CA_list(s);
/* 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;
}