Support TLS_FALLBACK_SCSV.

Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Bodo Moeller 2014-10-15 04:04:55 +02:00
parent dc7bca8bcc
commit a46c705214
17 changed files with 153 additions and 715 deletions

View file

@ -4,6 +4,12 @@
Changes between 1.0.1i and 1.0.2 [xx XXX xxxx]
*) Add support for TLS_FALLBACK_SCSV.
Client applications doing fallback retries should call
SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
(CVE-2014-3566)
[Adam Langley, Bodo Moeller]
*) Accelerated NIST P-256 elliptic curve implementation for x86_64
(other platforms pending).
[Shay Gueron (Intel Corp), Andy Polyakov]

View file

@ -1,686 +0,0 @@
##
## Makefile for OpenSSL
##
VERSION=
MAJOR=
MINOR=
SHLIB_VERSION_NUMBER=
SHLIB_VERSION_HISTORY=
SHLIB_MAJOR=
SHLIB_MINOR=
SHLIB_EXT=
PLATFORM=dist
OPTIONS=
CONFIGURE_ARGS=
SHLIB_TARGET=
# HERE indicates where this Makefile lives. This can be used to indicate
# where sub-Makefiles are expected to be. Currently has very limited usage,
# and should probably not be bothered with at all.
HERE=.
# INSTALL_PREFIX is for package builders so that they can configure
# for, say, /usr/ and yet have everything installed to /tmp/somedir/usr/.
# Normally it is left empty.
INSTALL_PREFIX=
INSTALLTOP=/usr/local/ssl
# Do not edit this manually. Use Configure --openssldir=DIR do change this!
OPENSSLDIR=/usr/local/ssl
# NO_IDEA - Define to build without the IDEA algorithm
# NO_RC4 - Define to build without the RC4 algorithm
# NO_RC2 - Define to build without the RC2 algorithm
# THREADS - Define when building with threads, you will probably also need any
# system defines as well, i.e. _REENTERANT for Solaris 2.[34]
# TERMIO - Define the termio terminal subsystem, needed if sgtty is missing.
# TERMIOS - Define the termios terminal subsystem, Silicon Graphics.
# LONGCRYPT - Define to use HPUX 10.x's long password modification to crypt(3).
# DEVRANDOM - Give this the value of the 'random device' if your OS supports
# one. 32 bytes will be read from this when the random
# number generator is initalised.
# SSL_FORBID_ENULL - define if you want the server to be not able to use the
# NULL encryption ciphers.
#
# LOCK_DEBUG - turns on lots of lock debug output :-)
# REF_CHECK - turn on some xyz_free() assertions.
# REF_PRINT - prints some stuff on structure free.
# CRYPTO_MDEBUG - turns on my 'memory leak' detecting stuff
# MFUNC - Make all Malloc/Free/Realloc calls call
# CRYPTO_malloc/CRYPTO_free/CRYPTO_realloc which can be setup to
# call application defined callbacks via CRYPTO_set_mem_functions()
# MD5_ASM needs to be defined to use the x86 assembler for MD5
# SHA1_ASM needs to be defined to use the x86 assembler for SHA1
# RMD160_ASM needs to be defined to use the x86 assembler for RIPEMD160
# Do not define B_ENDIAN or L_ENDIAN if 'unsigned long' == 8. It must
# equal 4.
# PKCS1_CHECK - pkcs1 tests.
CC= cc
CFLAG= -O
DEPFLAG=
PEX_LIBS=
EX_LIBS=
EXE_EXT=
ARFLAGS=
AR=ar $(ARFLAGS) r
RANLIB= ranlib
NM= nm
PERL= perl
TAR= tar
TARFLAGS= --no-recursion
MAKEDEPPROG=makedepend
LIBDIR=lib
# We let the C compiler driver to take care of .s files. This is done in
# order to be excused from maintaining a separate set of architecture
# dependent assembler flags. E.g. if you throw -mcpu=ultrasparc at SPARC
# gcc, then the driver will automatically translate it to -xarch=v8plus
# and pass it down to assembler.
AS=$(CC) -c
ASFLAG=$(CFLAG)
# For x86 assembler: Set PROCESSOR to 386 if you want to support
# the 80386.
PROCESSOR=
# CPUID module collects small commonly used assembler snippets
CPUID_OBJ=
BN_ASM= bn_asm.o
EC_ASM=
DES_ENC= des_enc.o fcrypt_b.o
AES_ENC= aes_core.o aes_cbc.o
BF_ENC= bf_enc.o
CAST_ENC= c_enc.o
RC4_ENC= rc4_enc.o
RC5_ENC= rc5_enc.o
MD5_ASM_OBJ=
SHA1_ASM_OBJ=
RMD160_ASM_OBJ=
WP_ASM_OBJ=
CMLL_ENC=
MODES_ASM_OBJ=
ENGINES_ASM_OBJ=
PERLASM_SCHEME=
# KRB5 stuff
KRB5_INCLUDES=
LIBKRB5=
# Zlib stuff
ZLIB_INCLUDE=
LIBZLIB=
# TOP level FIPS install directory.
FIPSDIR=
# This is the location of fipscanister.o and friends.
# The FIPS module build will place it $(INSTALLTOP)/lib
# but since $(INSTALLTOP) can only take the default value
# when the module is built it will be in /usr/local/ssl/lib
# $(INSTALLTOP) for this build may be different so hard
# code the path.
FIPSLIBDIR=
# The location of the library which contains fipscanister.o
# normally it will be libcrypto unless fipsdso is set in which
# case it will be libfips. If not compiling in FIPS mode at all
# this is empty making it a useful test for a FIPS compile.
FIPSCANLIB=
# Shared library base address. Currently only used on Windows.
#
BASEADDR=
DIRS= crypto ssl engines apps test tools
ENGDIRS= ccgost
SHLIBDIRS= crypto ssl
# dirs in crypto to build
SDIRS= \
objects \
md2 md4 md5 sha mdc2 hmac ripemd whrlpool \
des aes rc2 rc4 rc5 idea bf cast camellia seed modes \
bn ec rsa dsa ecdsa dh ecdh dso engine \
buffer bio stack lhash rand err \
evp asn1 pem x509 x509v3 conf txt_db pkcs7 pkcs12 comp ocsp ui krb5 \
cms pqueue ts jpake srp store cmac
# keep in mind that the above list is adjusted by ./Configure
# according to no-xxx arguments...
# tests to perform. "alltests" is a special word indicating that all tests
# should be performed.
TESTS = alltests
MAKEFILE= Makefile
MANDIR=$(OPENSSLDIR)/man
MAN1=1
MAN3=3
MANSUFFIX=
HTMLSUFFIX=html
HTMLDIR=$(OPENSSLDIR)/html
SHELL=/bin/sh
TOP= .
ONEDIRS=out tmp
EDIRS= times doc bugs util include certs ms shlib mt demos perl sf dep VMS
WDIRS= windows
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SHARED_LDFLAGS=
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HEADER= e_os.h
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# as we stick to -e, CLEARENV ensures that local variables in lower
# Makefiles remain local and variable. $${VAR+VAR} is tribute to Korn
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# is not present:-( TOP= && unset TOP is tribute to HP-UX /bin/sh,
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$${INCLUDE+INCLUDE} $${INCLUDES+INCLUDES} \
$${DIR+DIR} $${DIRS+DIRS} $${SRC+SRC} \
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$${GENERAL+GENERAL} $${CFLAGS+CFLAGS} \
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$${LDCMD+LDCMD} $${LDFLAGS+LDFLAGS} $${SCRIPTS+SCRIPTS} \
$${SHAREDCMD+SHAREDCMD} $${SHAREDFLAGS+SHAREDFLAGS} \
$${SHARED_LIB+SHARED_LIB} $${LIBEXTRAS+LIBEXTRAS}
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AS='$(CC)' ASFLAG='$(CFLAG) -c' \
AR='$(AR)' NM='$(NM)' RANLIB='$(RANLIB)' \
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DEPFLAG='-DOPENSSL_NO_DEPRECATED $(DEPFLAG)' \
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SHARED_LDFLAGS='$(SHARED_LDFLAGS)' \
KRB5_INCLUDES='$(KRB5_INCLUDES)' LIBKRB5='$(LIBKRB5)' \
ZLIB_INCLUDE='$(ZLIB_INCLUDE)' LIBZLIB='$(LIBZLIB)' \
EXE_EXT='$(EXE_EXT)' SHARED_LIBS='$(SHARED_LIBS)' \
SHLIB_EXT='$(SHLIB_EXT)' SHLIB_TARGET='$(SHLIB_TARGET)' \
PEX_LIBS='$(PEX_LIBS)' EX_LIBS='$(EX_LIBS)' \
CPUID_OBJ='$(CPUID_OBJ)' BN_ASM='$(BN_ASM)' \
EC_ASM='$(EC_ASM)' DES_ENC='$(DES_ENC)' \
AES_ENC='$(AES_ENC)' CMLL_ENC='$(CMLL_ENC)' \
BF_ENC='$(BF_ENC)' CAST_ENC='$(CAST_ENC)' \
RC4_ENC='$(RC4_ENC)' RC5_ENC='$(RC5_ENC)' \
SHA1_ASM_OBJ='$(SHA1_ASM_OBJ)' \
MD5_ASM_OBJ='$(MD5_ASM_OBJ)' \
RMD160_ASM_OBJ='$(RMD160_ASM_OBJ)' \
WP_ASM_OBJ='$(WP_ASM_OBJ)' \
MODES_ASM_OBJ='$(MODES_ASM_OBJ)' \
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PERLASM_SCHEME='$(PERLASM_SCHEME)' \
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tests: rehash
@(cd test && echo "testing..." && \
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mv -f $(INSTALL_PREFIX)$(INSTALLTOP)/$(LIBDIR)/$$i.new $(INSTALL_PREFIX)$(INSTALLTOP)/$(LIBDIR)/$$i; \
fi ); \
if expr $(PLATFORM) : 'mingw' > /dev/null; then \
( case $$i in \
*crypto*) i=libeay32.dll;; \
*ssl*) i=ssleay32.dll;; \
esac; \
echo installing $$i; \
cp $$i $(INSTALL_PREFIX)$(INSTALLTOP)/bin/$$i.new; \
chmod 755 $(INSTALL_PREFIX)$(INSTALLTOP)/bin/$$i.new; \
mv -f $(INSTALL_PREFIX)$(INSTALLTOP)/bin/$$i.new $(INSTALL_PREFIX)$(INSTALLTOP)/bin/$$i ); \
fi; \
fi; \
done; \
( here="`pwd`"; \
cd $(INSTALL_PREFIX)$(INSTALLTOP)/$(LIBDIR); \
$(MAKE) -f $$here/Makefile HERE="$$here" link-shared ); \
if [ "$(INSTALLTOP)" != "/usr" ]; then \
echo 'OpenSSL shared libraries have been installed in:'; \
echo ' $(INSTALLTOP)'; \
echo ''; \
sed -e '1,/^$$/d' doc/openssl-shared.txt; \
fi; \
fi
cp libcrypto.pc $(INSTALL_PREFIX)$(INSTALLTOP)/$(LIBDIR)/pkgconfig
chmod 644 $(INSTALL_PREFIX)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/libcrypto.pc
cp libssl.pc $(INSTALL_PREFIX)$(INSTALLTOP)/$(LIBDIR)/pkgconfig
chmod 644 $(INSTALL_PREFIX)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/libssl.pc
cp openssl.pc $(INSTALL_PREFIX)$(INSTALLTOP)/$(LIBDIR)/pkgconfig
chmod 644 $(INSTALL_PREFIX)$(INSTALLTOP)/$(LIBDIR)/pkgconfig/openssl.pc
install_html_docs:
here="`pwd`"; \
filecase=; \
case "$(PLATFORM)" in DJGPP|Cygwin*|mingw*|darwin*-*-cc) \
filecase=-i; \
esac; \
for subdir in apps crypto ssl; do \
mkdir -p $(INSTALL_PREFIX)$(HTMLDIR)/$$subdir; \
for i in doc/$$subdir/*.pod; do \
fn=`basename $$i .pod`; \
echo "installing html/$$fn.$(HTMLSUFFIX)"; \
cat $$i \
| sed -r 's/L<([^)]*)(\([0-9]\))?\|([^)]*)(\([0-9]\))?>/L<\1|\3>/g' \
| pod2html --podroot=doc --htmlroot=.. --podpath=apps:crypto:ssl \
| sed -r 's/<!DOCTYPE.*//g' \
> $(INSTALL_PREFIX)$(HTMLDIR)/$$subdir/$$fn.$(HTMLSUFFIX); \
$(PERL) util/extract-names.pl < $$i | \
grep -v $$filecase "^$$fn\$$" | \
(cd $(INSTALL_PREFIX)$(HTMLDIR)/$$subdir; \
while read n; do \
PLATFORM=$(PLATFORM) $$here/util/point.sh $$fn.$(HTMLSUFFIX) "$$n".$(HTMLSUFFIX); \
done); \
done; \
done
install_docs:
@$(PERL) $(TOP)/util/mkdir-p.pl \
$(INSTALL_PREFIX)$(MANDIR)/man1 \
$(INSTALL_PREFIX)$(MANDIR)/man3 \
$(INSTALL_PREFIX)$(MANDIR)/man5 \
$(INSTALL_PREFIX)$(MANDIR)/man7
@pod2man="`cd ./util; ./pod2mantest $(PERL)`"; \
here="`pwd`"; \
filecase=; \
case "$(PLATFORM)" in DJGPP|Cygwin*|mingw*|darwin*-*-cc) \
filecase=-i; \
esac; \
set -e; for i in doc/apps/*.pod; do \
fn=`basename $$i .pod`; \
sec=`$(PERL) util/extract-section.pl 1 < $$i`; \
echo "installing man$$sec/$$fn.$${sec}$(MANSUFFIX)"; \
(cd `$(PERL) util/dirname.pl $$i`; \
sh -c "$$pod2man \
--section=$$sec --center=OpenSSL \
--release=$(VERSION) `basename $$i`") \
> $(INSTALL_PREFIX)$(MANDIR)/man$$sec/$$fn.$${sec}$(MANSUFFIX); \
$(PERL) util/extract-names.pl < $$i | \
(grep -v $$filecase "^$$fn\$$"; true) | \
(grep -v "[ ]"; true) | \
(cd $(INSTALL_PREFIX)$(MANDIR)/man$$sec/; \
while read n; do \
PLATFORM=$(PLATFORM) $$here/util/point.sh $$fn.$${sec}$(MANSUFFIX) "$$n".$${sec}$(MANSUFFIX); \
done); \
done; \
set -e; for i in doc/crypto/*.pod doc/ssl/*.pod; do \
fn=`basename $$i .pod`; \
sec=`$(PERL) util/extract-section.pl 3 < $$i`; \
echo "installing man$$sec/$$fn.$${sec}$(MANSUFFIX)"; \
(cd `$(PERL) util/dirname.pl $$i`; \
sh -c "$$pod2man \
--section=$$sec --center=OpenSSL \
--release=$(VERSION) `basename $$i`") \
> $(INSTALL_PREFIX)$(MANDIR)/man$$sec/$$fn.$${sec}$(MANSUFFIX); \
$(PERL) util/extract-names.pl < $$i | \
(grep -v $$filecase "^$$fn\$$"; true) | \
(grep -v "[ ]"; true) | \
(cd $(INSTALL_PREFIX)$(MANDIR)/man$$sec/; \
while read n; do \
PLATFORM=$(PLATFORM) $$here/util/point.sh $$fn.$${sec}$(MANSUFFIX) "$$n".$${sec}$(MANSUFFIX); \
done); \
done
# DO NOT DELETE THIS LINE -- make depend depends on it.

View file

@ -343,6 +343,7 @@ static void sc_usage(void)
BIO_printf(bio_err," -tls1_1 - just use TLSv1.1\n");
BIO_printf(bio_err," -tls1 - just use TLSv1\n");
BIO_printf(bio_err," -dtls1 - just use DTLSv1\n");
BIO_printf(bio_err," -fallback_scsv - send TLS_FALLBACK_SCSV\n");
BIO_printf(bio_err," -mtu - set the link layer MTU\n");
BIO_printf(bio_err," -no_tls1_2/-no_tls1_1/-no_tls1/-no_ssl3/-no_ssl2 - turn off that protocol\n");
BIO_printf(bio_err," -bugs - Switch on all SSL implementation bug workarounds\n");
@ -649,6 +650,7 @@ int MAIN(int argc, char **argv)
char *sess_out = NULL;
struct sockaddr peer;
int peerlen = sizeof(peer);
int fallback_scsv = 0;
int enable_timeouts = 0 ;
long socket_mtu = 0;
#ifndef OPENSSL_NO_JPAKE
@ -925,6 +927,10 @@ static char *jpake_secret = NULL;
meth=DTLSv1_2_client_method();
socket_type=SOCK_DGRAM;
}
else if (strcmp(*argv,"-fallback_scsv") == 0)
{
fallback_scsv = 1;
}
else if (strcmp(*argv,"-timeout") == 0)
enable_timeouts=1;
else if (strcmp(*argv,"-mtu") == 0)
@ -1415,6 +1421,10 @@ bad:
SSL_set_session(con, sess);
SSL_SESSION_free(sess);
}
if (fallback_scsv)
SSL_set_mode(con, SSL_MODE_SEND_FALLBACK_SCSV);
#ifndef OPENSSL_NO_TLSEXT
if (servername != NULL)
{

View file

@ -72,6 +72,7 @@ R SSL_R_TLSV1_ALERT_EXPORT_RESTRICTION 1060
R SSL_R_TLSV1_ALERT_PROTOCOL_VERSION 1070
R SSL_R_TLSV1_ALERT_INSUFFICIENT_SECURITY 1071
R SSL_R_TLSV1_ALERT_INTERNAL_ERROR 1080
R SSL_R_SSLV3_ALERT_INAPPROPRIATE_FALLBACK 1086
R SSL_R_TLSV1_ALERT_USER_CANCELLED 1090
R SSL_R_TLSV1_ALERT_NO_RENEGOTIATION 1100
R SSL_R_TLSV1_UNSUPPORTED_EXTENSION 1110

View file

@ -294,6 +294,25 @@ long dtls1_ctrl(SSL *s, int cmd, long larg, void *parg)
case DTLS_CTRL_LISTEN:
ret = dtls1_listen(s, parg);
break;
case SSL_CTRL_CHECK_PROTO_VERSION:
/* For library-internal use; checks 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 == DTLS_method()->version)
{
#if DTLS_MAX_VERSION != DTLS1_2_VERSION
# error Code needs update for DTLS_method() support beyond DTLS1_2_VERSION.
#endif
if (!(s->options & SSL_OP_NO_DTLSv1_2))
return s->version == DTLS1_2_VERSION;
if (!(s->options & SSL_OP_NO_DTLSv1))
return s->version == DTLS1_VERSION;
}
return 0; /* Unexpected state; fail closed. */
default:
ret = ssl3_ctrl(s, cmd, larg, parg);

View file

@ -84,8 +84,11 @@ extern "C" {
#endif
#define DTLS1_VERSION 0xFEFF
#define DTLS1_BAD_VER 0x0100
#define DTLS1_2_VERSION 0xFEFD
#define DTLS_MAX_VERSION DTLS1_2_VERSION
#define DTLS1_BAD_VER 0x0100
/* Special value for method supporting multiple versions */
#define DTLS_ANY_VERSION 0x1FFFF
@ -287,4 +290,3 @@ typedef struct dtls1_record_data_st
}
#endif
#endif

View file

@ -748,6 +748,9 @@ static int ssl23_get_server_hello(SSL *s)
goto err;
}
/* ensure that TLS_MAX_VERSION is up-to-date */
OPENSSL_assert(s->version <= TLS_MAX_VERSION);
if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING)
{
/* fatal alert */

View file

@ -421,6 +421,9 @@ int ssl23_get_client_hello(SSL *s)
}
}
/* ensure that TLS_MAX_VERSION is up-to-date */
OPENSSL_assert(s->version <= TLS_MAX_VERSION);
if (s->version < TLS1_2_VERSION && tls1_suiteb(s))
{
SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,

View file

@ -391,6 +391,8 @@ long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg)
case SSL_CTRL_GET_SESSION_REUSED:
ret=s->hit;
break;
case SSL_CTRL_CHECK_PROTO_VERSION:
return ssl3_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, larg, parg);
default:
break;
}
@ -434,7 +436,7 @@ int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
if (p != NULL)
{
l=c->id;
if ((l & 0xff000000) != 0x02000000) return(0);
if ((l & 0xff000000) != 0x02000000 && l != SSL3_CK_FALLBACK_SCSV) return(0);
p[0]=((unsigned char)(l>>16L))&0xFF;
p[1]=((unsigned char)(l>> 8L))&0xFF;
p[2]=((unsigned char)(l ))&0xFF;

View file

@ -941,7 +941,7 @@ int ssl3_alert_code(int code)
case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(SSL3_AD_HANDSHAKE_FAILURE);
case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(SSL3_AD_HANDSHAKE_FAILURE);
case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
case SSL_AD_INAPPROPRIATE_FALLBACK:return(TLS1_AD_INAPPROPRIATE_FALLBACK);
default: return(-1);
}
}

View file

@ -3598,6 +3598,33 @@ long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg)
return (int)sess->tlsext_ecpointformatlist_length;
}
#endif
case SSL_CTRL_CHECK_PROTO_VERSION:
/* For library-internal use; checks 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 == SSLv23_method()->version)
{
#if TLS_MAX_VERSION != TLS1_2_VERSION
# error Code needs update for SSLv23_method() support beyond TLS1_2_VERSION.
#endif
if (!(s->options & SSL_OP_NO_TLSv1_2))
return s->version == TLS1_2_VERSION;
if (!(s->options & SSL_OP_NO_TLSv1_1))
return s->version == TLS1_1_VERSION;
if (!(s->options & SSL_OP_NO_TLSv1))
return s->version == TLS1_VERSION;
if (!(s->options & SSL_OP_NO_SSLv3))
return s->version == SSL3_VERSION;
if (!(s->options & SSL_OP_NO_SSLv2))
return s->version == SSL2_VERSION;
}
return 0; /* Unexpected state; fail closed. */
default:
break;
}
@ -4519,4 +4546,3 @@ long ssl_get_algorithm2(SSL *s)
return SSL_HANDSHAKE_MAC_SHA256 | TLS1_PRF_SHA256;
return alg2;
}

View file

@ -681,6 +681,10 @@ struct ssl_session_st
*/
#define SSL_MODE_SEND_CLIENTHELLO_TIME 0x00000020L
#define SSL_MODE_SEND_SERVERHELLO_TIME 0x00000040L
/* Send TLS_FALLBACK_SCSV in the ClientHello.
* To be set by applications that reconnect with a downgraded protocol
* version; see draft-ietf-tls-downgrade-scsv-00 for details. */
#define SSL_MODE_SEND_FALLBACK_SCSV 0x00000080L
/* Cert related flags */
/* Many implementations ignore some aspects of the TLS standards such as
@ -1683,6 +1687,7 @@ DECLARE_PEM_rw(SSL_SESSION, SSL_SESSION)
#define SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE
#define SSL_AD_BAD_CERTIFICATE_HASH_VALUE TLS1_AD_BAD_CERTIFICATE_HASH_VALUE
#define SSL_AD_UNKNOWN_PSK_IDENTITY TLS1_AD_UNKNOWN_PSK_IDENTITY /* fatal */
#define SSL_AD_INAPPROPRIATE_FALLBACK TLS1_AD_INAPPROPRIATE_FALLBACK /* fatal */
#define SSL_ERROR_NONE 0
#define SSL_ERROR_SSL 1
@ -1821,6 +1826,9 @@ DECLARE_PEM_rw(SSL_SESSION, SSL_SESSION)
#define SSL_CTRL_SELECT_CURRENT_CERT 116
#define SSL_CTRL_SET_CURRENT_CERT 117
#define SSL_CTRL_CHECK_PROTO_VERSION 119
#define SSL_CERT_SET_FIRST 1
#define SSL_CERT_SET_NEXT 2
#define SSL_CERT_SET_SERVER 3
@ -2765,6 +2773,7 @@ void ERR_load_SSL_strings(void);
#define SSL_R_HTTP_REQUEST 156
#define SSL_R_ILLEGAL_PADDING 283
#define SSL_R_ILLEGAL_SUITEB_DIGEST 380
#define SSL_R_INAPPROPRIATE_FALLBACK 373
#define SSL_R_INCONSISTENT_COMPRESSION 340
#define SSL_R_INVALID_CHALLENGE_LENGTH 158
#define SSL_R_INVALID_COMMAND 280
@ -2921,6 +2930,7 @@ void ERR_load_SSL_strings(void);
#define SSL_R_TLSV1_ALERT_DECRYPTION_FAILED 1021
#define SSL_R_TLSV1_ALERT_DECRYPT_ERROR 1051
#define SSL_R_TLSV1_ALERT_EXPORT_RESTRICTION 1060
#define SSL_R_TLSV1_ALERT_INAPPROPRIATE_FALLBACK 1086
#define SSL_R_TLSV1_ALERT_INSUFFICIENT_SECURITY 1071
#define SSL_R_TLSV1_ALERT_INTERNAL_ERROR 1080
#define SSL_R_TLSV1_ALERT_NO_RENEGOTIATION 1100

View file

@ -128,9 +128,14 @@
extern "C" {
#endif
/* Signalling cipher suite value: from draft-ietf-tls-renegotiation-03.txt */
/* Signalling cipher suite value from RFC 5746
* (TLS_EMPTY_RENEGOTIATION_INFO_SCSV) */
#define SSL3_CK_SCSV 0x030000FF
/* Signalling cipher suite value from draft-ietf-tls-downgrade-scsv-00
* (TLS_FALLBACK_SCSV) */
#define SSL3_CK_FALLBACK_SCSV 0x03005600
#define SSL3_CK_RSA_NULL_MD5 0x03000001
#define SSL3_CK_RSA_NULL_SHA 0x03000002
#define SSL3_CK_RSA_RC4_40_MD5 0x03000003

View file

@ -398,6 +398,7 @@ static ERR_STRING_DATA SSL_str_reasons[]=
{ERR_REASON(SSL_R_HTTP_REQUEST) ,"http request"},
{ERR_REASON(SSL_R_ILLEGAL_PADDING) ,"illegal padding"},
{ERR_REASON(SSL_R_ILLEGAL_SUITEB_DIGEST) ,"illegal Suite B digest"},
{ERR_REASON(SSL_R_INAPPROPRIATE_FALLBACK),"inappropriate fallback"},
{ERR_REASON(SSL_R_INCONSISTENT_COMPRESSION),"inconsistent compression"},
{ERR_REASON(SSL_R_INVALID_CHALLENGE_LENGTH),"invalid challenge length"},
{ERR_REASON(SSL_R_INVALID_COMMAND) ,"invalid command"},
@ -554,6 +555,7 @@ static ERR_STRING_DATA SSL_str_reasons[]=
{ERR_REASON(SSL_R_TLSV1_ALERT_DECRYPTION_FAILED),"tlsv1 alert decryption failed"},
{ERR_REASON(SSL_R_TLSV1_ALERT_DECRYPT_ERROR),"tlsv1 alert decrypt error"},
{ERR_REASON(SSL_R_TLSV1_ALERT_EXPORT_RESTRICTION),"tlsv1 alert export restriction"},
{ERR_REASON(SSL_R_TLSV1_ALERT_INAPPROPRIATE_FALLBACK),"tlsv1 alert inappropriate fallback"},
{ERR_REASON(SSL_R_TLSV1_ALERT_INSUFFICIENT_SECURITY),"tlsv1 alert insufficient security"},
{ERR_REASON(SSL_R_TLSV1_ALERT_INTERNAL_ERROR),"tlsv1 alert internal error"},
{ERR_REASON(SSL_R_TLSV1_ALERT_NO_RENEGOTIATION),"tlsv1 alert no renegotiation"},

View file

@ -1464,12 +1464,14 @@ int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
SSL_CIPHER *c;
CERT *ct = s->cert;
unsigned char *q;
int no_scsv = s->renegotiate;
int empty_reneg_info_scsv = !s->renegotiate;
/* Set disabled masks for this session */
ssl_set_client_disabled(s);
if (sk == NULL) return(0);
q=p;
if (put_cb == NULL)
put_cb = s->method->put_cipher_by_char;
for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
{
@ -1482,29 +1484,40 @@ int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
if (c->id == SSL3_CK_SCSV)
{
if (no_scsv)
if (!empty_reneg_info_scsv)
continue;
else
no_scsv = 1;
empty_reneg_info_scsv = 0;
}
#endif
j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
j = put_cb(c,p);
p+=j;
}
/* If p == q, no ciphers and caller indicates an error. Otherwise
* add SCSV if not renegotiating.
*/
if (p != q && !no_scsv)
/* If p == q, no ciphers; caller indicates an error.
* Otherwise, add applicable SCSVs. */
if (p != q)
{
static SSL_CIPHER scsv =
if (empty_reneg_info_scsv)
{
0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
p+=j;
static SSL_CIPHER scsv =
{
0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
j = put_cb(&scsv,p);
p+=j;
#ifdef OPENSSL_RI_DEBUG
fprintf(stderr, "SCSV sent by client\n");
fprintf(stderr, "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
#endif
}
if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV)
{
static SSL_CIPHER scsv =
{
0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
j = put_cb(&scsv,p);
p+=j;
}
}
return(p-q);
@ -1516,11 +1529,12 @@ STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
const SSL_CIPHER *c;
STACK_OF(SSL_CIPHER) *sk;
int i,n;
if (s->s3)
s->s3->send_connection_binding = 0;
n=ssl_put_cipher_by_char(s,NULL,NULL);
if ((num%n) != 0)
if (n == 0 || (num%n) != 0)
{
SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
return(NULL);
@ -1545,7 +1559,7 @@ STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
for (i=0; i<num; i+=n)
{
/* Check for SCSV */
/* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
if (s->s3 && (n != 3 || !p[0]) &&
(p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
(p[n-1] == (SSL3_CK_SCSV & 0xff)))
@ -1565,6 +1579,23 @@ STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
continue;
}
/* Check for TLS_FALLBACK_SCSV */
if ((n != 3 || !p[0]) &&
(p[n-2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
(p[n-1] == (SSL3_CK_FALLBACK_SCSV & 0xff)))
{
/* The SCSV indicates that the client previously tried a higher version.
* Fail if the current version is an unexpected downgrade. */
if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL))
{
SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_INAPPROPRIATE_FALLBACK);
if (s->s3)
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INAPPROPRIATE_FALLBACK);
goto err;
}
continue;
}
c=ssl_get_cipher_by_char(s,p);
p+=n;
if (c != NULL)

View file

@ -1286,6 +1286,7 @@ int tls1_alert_code(int code)
case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
case SSL_AD_INAPPROPRIATE_FALLBACK:return(TLS1_AD_INAPPROPRIATE_FALLBACK);
#if 0 /* not appropriate for TLS, not used for DTLS */
case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
(DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);

View file

@ -159,17 +159,19 @@ extern "C" {
#define TLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES 0
#define TLS1_2_VERSION 0x0303
#define TLS1_2_VERSION_MAJOR 0x03
#define TLS1_2_VERSION_MINOR 0x03
#define TLS1_VERSION 0x0301
#define TLS1_1_VERSION 0x0302
#define TLS1_2_VERSION 0x0303
#define TLS_MAX_VERSION TLS1_2_VERSION
#define TLS1_VERSION_MAJOR 0x03
#define TLS1_VERSION_MINOR 0x01
#define TLS1_1_VERSION_MAJOR 0x03
#define TLS1_1_VERSION_MINOR 0x02
#define TLS1_VERSION 0x0301
#define TLS1_VERSION_MAJOR 0x03
#define TLS1_VERSION_MINOR 0x01
#define TLS1_2_VERSION_MAJOR 0x03
#define TLS1_2_VERSION_MINOR 0x03
#define TLS1_get_version(s) \
((s->version >> 8) == TLS1_VERSION_MAJOR ? s->version : 0)
@ -187,6 +189,7 @@ extern "C" {
#define TLS1_AD_PROTOCOL_VERSION 70 /* fatal */
#define TLS1_AD_INSUFFICIENT_SECURITY 71 /* fatal */
#define TLS1_AD_INTERNAL_ERROR 80 /* fatal */
#define TLS1_AD_INAPPROPRIATE_FALLBACK 86 /* fatal */
#define TLS1_AD_USER_CANCELLED 90
#define TLS1_AD_NO_RENEGOTIATION 100
/* codes 110-114 are from RFC3546 */