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openssl: add a patch to support DTLS compatibility with Cisco AnyConnect & OpenConnect VPN clients (thanks to freezer)

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SVN-Revision: 15410
This commit is contained in:
Nicolas Thill 2009-04-25 16:33:00 +00:00
parent 5282bfd731
commit 2a54a83244
2 changed files with 141 additions and 2 deletions
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4
package/openssl/Makefile
View File

@ -1,5 +1,5 @@
#
# Copyright (C) 2006-2008 OpenWrt.org
# Copyright (C) 2006-2009 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=openssl
PKG_VERSION:=0.9.8k
PKG_RELEASE:=1
PKG_RELEASE:=2
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
PKG_SOURCE_URL:=http://www.openssl.org/source/ \

139
package/openssl/patches/001-upstream_dtls_cisco.patch Normal file
View File

@ -0,0 +1,139 @@
--- a/ssl/d1_clnt.c
+++ b/ssl/d1_clnt.c
@@ -130,7 +130,7 @@ static int dtls1_get_hello_verify(SSL *s
static SSL_METHOD *dtls1_get_client_method(int ver)
{
- if (ver == DTLS1_VERSION)
+ if (ver == DTLS1_VERSION || ver == DTLS1_BAD_VER)
return(DTLSv1_client_method());
else
return(NULL);
@@ -181,7 +181,8 @@ int dtls1_connect(SSL *s)
s->server=0;
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
- if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00))
+ if ((s->version & 0xff00 ) != (DTLS1_VERSION & 0xff00) &&
+ (s->version & 0xff00 ) != (DTLS1_BAD_VER & 0xff00))
{
SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
ret = -1;
--- a/ssl/d1_lib.c
+++ b/ssl/d1_lib.c
@@ -187,7 +187,10 @@ void dtls1_free(SSL *s)
void dtls1_clear(SSL *s)
{
ssl3_clear(s);
- s->version=DTLS1_VERSION;
+ if (s->options & SSL_OP_CISCO_ANYCONNECT)
+ s->version=DTLS1_BAD_VER;
+ else
+ s->version=DTLS1_VERSION;
}
/*
--- a/ssl/d1_pkt.c
+++ b/ssl/d1_pkt.c
@@ -987,15 +987,17 @@ start:
if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC)
{
struct ccs_header_st ccs_hdr;
+ int ccs_hdr_len = DTLS1_CCS_HEADER_LENGTH;
dtls1_get_ccs_header(rr->data, &ccs_hdr);
/* 'Change Cipher Spec' is just a single byte, so we know
* exactly what the record payload has to look like */
/* XDTLS: check that epoch is consistent */
- if ( (s->client_version == DTLS1_BAD_VER && rr->length != 3) ||
- (s->client_version != DTLS1_BAD_VER && rr->length != DTLS1_CCS_HEADER_LENGTH) ||
- (rr->off != 0) || (rr->data[0] != SSL3_MT_CCS))
+ if (s->client_version == DTLS1_BAD_VER || s->version == DTLS1_BAD_VER)
+ ccs_hdr_len = 3;
+
+ if ((rr->length != ccs_hdr_len) || (rr->off != 0) || (rr->data[0] != SSL3_MT_CCS))
{
i=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC);
@@ -1311,7 +1313,7 @@ int do_dtls1_write(SSL *s, int type, con
#if 0
/* 'create_empty_fragment' is true only when this function calls itself */
if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done
- && SSL_version(s) != DTLS1_VERSION)
+ && SSL_version(s) != DTLS1_VERSION && SSL_version(s) != DTLS1_BAD_VER)
{
/* countermeasure against known-IV weakness in CBC ciphersuites
* (see http://www.openssl.org/~bodo/tls-cbc.txt)
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -708,7 +708,7 @@ int ssl3_get_server_hello(SSL *s)
if (!ok) return((int)n);
- if ( SSL_version(s) == DTLS1_VERSION)
+ if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
{
if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
{
--- a/ssl/ssl.h
+++ b/ssl/ssl.h
@@ -510,6 +510,8 @@ typedef struct ssl_session_st
#define SSL_OP_COOKIE_EXCHANGE 0x00002000L
/* Don't use RFC4507 ticket extension */
#define SSL_OP_NO_TICKET 0x00004000L
+/* Use Cisco's "speshul" version of DTLS_BAD_VER (as client) */
+#define SSL_OP_CISCO_ANYCONNECT 0x00008000L
/* As server, disallow session resumption on renegotiation */
#define SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION 0x00010000L
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -995,7 +995,8 @@ long SSL_ctrl(SSL *s,int cmd,long larg,v
s->max_cert_list=larg;
return(l);
case SSL_CTRL_SET_MTU:
- if (SSL_version(s) == DTLS1_VERSION)
+ if (SSL_version(s) == DTLS1_VERSION ||
+ SSL_version(s) == DTLS1_BAD_VER)
{
s->d1->mtu = larg;
return larg;
--- a/ssl/ssl_sess.c
+++ b/ssl/ssl_sess.c
@@ -211,6 +211,11 @@ int ssl_get_new_session(SSL *s, int sess
ss->ssl_version=TLS1_VERSION;
ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
}
+ else if (s->version == DTLS1_BAD_VER)
+ {
+ ss->ssl_version=DTLS1_BAD_VER;
+ ss->session_id_length=SSL3_SSL_SESSION_ID_LENGTH;
+ }
else if (s->version == DTLS1_VERSION)
{
ss->ssl_version=DTLS1_VERSION;
--- a/ssl/t1_enc.c
+++ b/ssl/t1_enc.c
@@ -765,10 +765,10 @@ int tls1_mac(SSL *ssl, unsigned char *md
HMAC_CTX_init(&hmac);
HMAC_Init_ex(&hmac,mac_sec,EVP_MD_size(hash),hash,NULL);
- if (ssl->version == DTLS1_VERSION && ssl->client_version != DTLS1_BAD_VER)
+ if (ssl->version == DTLS1_BAD_VER ||
+ (ssl->version == DTLS1_VERSION && ssl->client_version != DTLS1_BAD_VER))
{
unsigned char dtlsseq[8],*p=dtlsseq;
-
s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
memcpy (p,&seq[2],6);
@@ -793,7 +793,7 @@ printf("rec=");
{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
#endif
- if ( SSL_version(ssl) != DTLS1_VERSION)
+ if ( SSL_version(ssl) != DTLS1_VERSION && SSL_version(ssl) != DTLS1_BAD_VER)
{
for (i=7; i>=0; i--)
{