[packages/openssl102: 346/432] - rel 2; add support for TLS_FALLBACK_SCSV which should help mitigate latest SSLv3 SECURITY issue (C

adwol adwol at pld-linux.org
Sat Sep 29 01:30:38 CEST 2018


commit 4f10a2916dac1ebd275bd5c763bc31022892e283
Author: Arkadiusz Miśkiewicz <arekm at maven.pl>
Date:   Wed Oct 15 06:49:05 2014 +0200

    - rel 2; add support for TLS_FALLBACK_SCSV which should help mitigate latest SSLv3 SECURITY issue (CVE-2014-3566)

 openssl-CVE-2014-3566.patch | 488 ++++++++++++++++++++++++++++++++++++++++++++
 openssl.spec                |   4 +-
 2 files changed, 491 insertions(+), 1 deletion(-)
---
diff --git a/openssl.spec b/openssl.spec
index 7a9c26a..9f038e2 100644
--- a/openssl.spec
+++ b/openssl.spec
@@ -17,7 +17,7 @@ Summary(ru.UTF-8):	Библиотеки и утилиты для соедине
 Summary(uk.UTF-8):	Бібліотеки та утиліти для з'єднань через Secure Sockets Layer
 Name:		openssl
 Version:	1.0.1i
-Release:	1
+Release:	2
 License:	Apache-like
 Group:		Libraries
 Source0:	ftp://ftp.openssl.org/source/%{name}-%{version}.tar.gz
@@ -34,6 +34,7 @@ Patch5:		%{name}-asflag.patch
 Patch6:		%{name}-ca-certificates.patch
 Patch7:		%{name}-ldflags.patch
 Patch8:		%{name}-find.patch
+Patch9:		%{name}-CVE-2014-3566.patch
 # from debian
 Patch10:	default_bits.patch
 Patch11:	pic.patch
@@ -253,6 +254,7 @@ бібліотеки для розробки програм з використ
 %patch6 -p1
 %patch7 -p1
 %patch8 -p1
+%patch9 -p1
 %patch10 -p1
 %patch11 -p1
 %patch12 -p1
diff --git a/openssl-CVE-2014-3566.patch b/openssl-CVE-2014-3566.patch
new file mode 100644
index 0000000..6215742
--- /dev/null
+++ b/openssl-CVE-2014-3566.patch
@@ -0,0 +1,488 @@
+From 6bfe55380abbf7528e04e59f18921bd6c896af1c Mon Sep 17 00:00:00 2001
+From: Bodo Moeller <bodo at openssl.org>
+Date: Wed, 15 Oct 2014 04:05:42 +0200
+Subject: [PATCH] Support TLS_FALLBACK_SCSV.
+
+Reviewed-by: Rich Salz <rsalz at openssl.org>
+---
+ CHANGES               |    6 +++++
+ apps/s_client.c       |   10 +++++++++
+ crypto/err/openssl.ec |    1 +
+ ssl/d1_lib.c          |   10 +++++++++
+ ssl/dtls1.h           |    3 ++-
+ ssl/s23_clnt.c        |    3 +++
+ ssl/s23_srvr.c        |    3 +++
+ ssl/s2_lib.c          |    4 +++-
+ ssl/s3_enc.c          |    2 +-
+ ssl/s3_lib.c          |   29 +++++++++++++++++++++++-
+ ssl/ssl.h             |    9 ++++++++
+ ssl/ssl3.h            |    7 +++++-
+ ssl/ssl_err.c         |    2 ++
+ ssl/ssl_lib.c         |   60 +++++++++++++++++++++++++++++++++++++------------
+ ssl/t1_enc.c          |    1 +
+ ssl/tls1.h            |   15 ++++++++-----
+ 16 files changed, 140 insertions(+), 25 deletions(-)
+
+;  *) 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]
+;
+diff --git a/apps/s_client.c b/apps/s_client.c
+index 4625467..c2e160c 100644
+--- a/apps/s_client.c
++++ b/apps/s_client.c
+@@ -337,6 +337,7 @@ 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");
+@@ -617,6 +618,7 @@ 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
+@@ -823,6 +825,10 @@ int MAIN(int argc, char **argv)
+ 			meth=DTLSv1_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)
+@@ -1235,6 +1241,10 @@ 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)
+ 		{
+diff --git a/crypto/err/openssl.ec b/crypto/err/openssl.ec
+index e0554b4..34754e5 100644
+--- a/crypto/err/openssl.ec
++++ b/crypto/err/openssl.ec
+@@ -71,6 +71,7 @@ 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
+diff --git a/ssl/d1_lib.c b/ssl/d1_lib.c
+index 6bde16f..82ca653 100644
+--- a/ssl/d1_lib.c
++++ b/ssl/d1_lib.c
+@@ -266,6 +266,16 @@ 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 DTLS_MAX_VERSION != DTLS1_VERSION
++#  error Code needs update for DTLS_method() support beyond DTLS1_VERSION.
++#endif
++		/* Just one protocol version is supported so far;
++		 * fail closed if the version is not as expected. */
++		return s->version == DTLS_MAX_VERSION;
+ 
+ 	default:
+ 		ret = ssl3_ctrl(s, cmd, larg, parg);
+diff --git a/ssl/dtls1.h b/ssl/dtls1.h
+index e65d501..192c5de 100644
+--- a/ssl/dtls1.h
++++ b/ssl/dtls1.h
+@@ -84,6 +84,8 @@ extern "C" {
+ #endif
+ 
+ #define DTLS1_VERSION			0xFEFF
++#define DTLS_MAX_VERSION		DTLS1_VERSION
++
+ #define DTLS1_BAD_VER			0x0100
+ 
+ #if 0
+@@ -284,4 +286,3 @@ typedef struct dtls1_record_data_st
+ }
+ #endif
+ #endif
+-
+diff --git a/ssl/s23_clnt.c b/ssl/s23_clnt.c
+index 2b93c63..d4e43c3 100644
+--- a/ssl/s23_clnt.c
++++ b/ssl/s23_clnt.c
+@@ -736,6 +736,9 @@ 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 */
+diff --git a/ssl/s23_srvr.c b/ssl/s23_srvr.c
+index 2901a6b..567a6b1 100644
+--- a/ssl/s23_srvr.c
++++ b/ssl/s23_srvr.c
+@@ -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);
++
+ #ifdef OPENSSL_FIPS
+ 	if (FIPS_mode() && (s->version < TLS1_VERSION))
+ 		{
+diff --git a/ssl/s2_lib.c b/ssl/s2_lib.c
+index c0bdae5..c63be30 100644
+--- a/ssl/s2_lib.c
++++ b/ssl/s2_lib.c
+@@ -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;
+ 		}
+@@ -437,7 +439,7 @@ 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;
+diff --git a/ssl/s3_enc.c b/ssl/s3_enc.c
+index 9962677..9db45af 100644
+--- a/ssl/s3_enc.c
++++ b/ssl/s3_enc.c
+@@ -900,7 +900,7 @@ 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);
+ 		}
+ 	}
+-
+diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
+index e17f126..3f17453 100644
+--- a/ssl/s3_lib.c
++++ b/ssl/s3_lib.c
+@@ -3355,6 +3355,33 @@ long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg)
+ #endif
+ 
+ #endif /* !OPENSSL_NO_TLSEXT */
++
++	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;
+ 		}
+@@ -3714,6 +3741,7 @@ long ssl3_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
+ 		break;
+ #endif
+ #endif
++
+ 	default:
+ 		return(0);
+ 		}
+@@ -4296,4 +4324,3 @@ long ssl_get_algorithm2(SSL *s)
+ 		return SSL_HANDSHAKE_MAC_SHA256 | TLS1_PRF_SHA256;
+ 	return alg2;
+ 	}
+-		
+diff --git a/ssl/ssl.h b/ssl/ssl.h
+index b73da5e..b78a1cc 100644
+--- a/ssl/ssl.h
++++ b/ssl/ssl.h
+@@ -653,6 +653,10 @@ 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
+ 
+ /* Note: SSL[_CTX]_set_{options,mode} use |= op on the previous value,
+  * they cannot be used to clear bits. */
+@@ -1511,6 +1515,7 @@ 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
+@@ -1621,6 +1626,8 @@ DECLARE_PEM_rw(SSL_SESSION, SSL_SESSION)
+ #define SSL_CTRL_GET_EXTRA_CHAIN_CERTS		82
+ #define SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS	83
+ 
++#define SSL_CTRL_CHECK_PROTO_VERSION		119
++
+ #define DTLSv1_get_timeout(ssl, arg) \
+ 	SSL_ctrl(ssl,DTLS_CTRL_GET_TIMEOUT,0, (void *)arg)
+ #define DTLSv1_handle_timeout(ssl) \
+@@ -2379,6 +2386,7 @@ void ERR_load_SSL_strings(void);
+ #define SSL_R_HTTPS_PROXY_REQUEST			 155
+ #define SSL_R_HTTP_REQUEST				 156
+ #define SSL_R_ILLEGAL_PADDING				 283
++#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
+@@ -2525,6 +2533,7 @@ 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
+diff --git a/ssl/ssl3.h b/ssl/ssl3.h
+index 37f19e3..85f1504 100644
+--- a/ssl/ssl3.h
++++ b/ssl/ssl3.h
+@@ -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
+diff --git a/ssl/ssl_err.c b/ssl/ssl_err.c
+index d2f0dec..1b7eb47 100644
+--- a/ssl/ssl_err.c
++++ b/ssl/ssl_err.c
+@@ -383,6 +383,7 @@ static ERR_STRING_DATA SSL_str_reasons[]=
+ {ERR_REASON(SSL_R_HTTPS_PROXY_REQUEST)   ,"https proxy request"},
+ {ERR_REASON(SSL_R_HTTP_REQUEST)          ,"http request"},
+ {ERR_REASON(SSL_R_ILLEGAL_PADDING)       ,"illegal padding"},
++{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"},
+@@ -529,6 +530,7 @@ 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"},
+diff --git a/ssl/ssl_lib.c b/ssl/ssl_lib.c
+index cc094e4..3f66fc0 100644
+--- a/ssl/ssl_lib.c
++++ b/ssl/ssl_lib.c
+@@ -1387,6 +1387,8 @@ int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
+ 
+ 	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++)
+ 		{
+@@ -1411,24 +1413,36 @@ int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
+ 		    !(s->srp_ctx.srp_Mask & SSL_kSRP))
+ 		    continue;
+ #endif /* OPENSSL_NO_SRP */
+-		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 && !s->renegotiate)
++	/* If p == q, no ciphers; caller indicates an error.
++	 * Otherwise, add applicable SCSVs. */
++	if (p != q)
+ 		{
+-		static SSL_CIPHER scsv =
++		if (!s->renegotiate)
+ 			{
+-			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);
+ 	}
+@@ -1439,11 +1453,12 @@ 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);
+@@ -1458,7 +1473,7 @@ 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)))
+@@ -1478,6 +1493,23 @@ 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)
+diff --git a/ssl/t1_enc.c b/ssl/t1_enc.c
+index 1427484..1923cf3 100644
+--- a/ssl/t1_enc.c
++++ b/ssl/t1_enc.c
+@@ -1241,6 +1241,7 @@ 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);
+diff --git a/ssl/tls1.h b/ssl/tls1.h
+index c992091..6ae8876 100644
+--- a/ssl/tls1.h
++++ b/ssl/tls1.h
+@@ -159,17 +159,19 @@ extern "C" {
+ 
+ #define TLS1_ALLOW_EXPERIMENTAL_CIPHERSUITES	0
+ 
++#define TLS1_VERSION			0x0301
++#define TLS1_1_VERSION			0x0302
+ #define TLS1_2_VERSION			0x0303
+-#define TLS1_2_VERSION_MAJOR		0x03
+-#define TLS1_2_VERSION_MINOR		0x03
++#define TLS_MAX_VERSION			TLS1_2_VERSION
++
++#define TLS1_VERSION_MAJOR		0x03
++#define TLS1_VERSION_MINOR		0x01
+ 
+-#define TLS1_1_VERSION			0x0302
+ #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 */
+-- 
+1.7.9.5
+
================================================================

---- gitweb:

http://git.pld-linux.org/gitweb.cgi/packages/openssl102.git/commitdiff/9fc1b1b87b259e8a327c99835865e91a391efc9e



More information about the pld-cvs-commit mailing list