Commit 2be3d6eb authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Client side compression algorithm sanity checks: ensure old compression 

algorithm matches current and give error if compression is disabled and
server requests it (shouldn't happen unless server is broken).
parent e6f418bc

ssl/s3_clnt.c

+22 −1
Original line number Diff line number Diff line
@@ -891,10 +891,31 @@ int ssl3_get_server_hello(SSL *s) 
		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);

		goto f_err;

		}

	/* If compression is disabled we'd better not try to resume a session

	 * using compression.

	 */

	if (s->session->compress_meth != 0)

		{

		al=SSL_AD_INTERNAL_ERROR;

		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);

		goto f_err;

		}

#else

	j= *(p++);

	if ((j == 0) || (s->options & SSL_OP_NO_COMPRESSION))

	if (s->hit && j != (int)s->session->compress_meth)

		{

		al=SSL_AD_ILLEGAL_PARAMETER;

		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);

		goto f_err;

		}

	if (j == 0)

		comp=NULL;

	else if (s->options & SSL_OP_NO_COMPRESSION)

		{

		al=SSL_AD_ILLEGAL_PARAMETER;

		SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);

		goto f_err;

		}

	else

		comp=ssl3_comp_find(s->ctx->comp_methods,j);

ssl/s3_srvr.c

+1 −1
Original line number Diff line number Diff line
@@ -1159,7 +1159,7 @@ int ssl3_get_client_hello(SSL *s) 
	/* If compression is disabled we'd better not try to resume a session

	 * using compression.

	 */

	if (s->session->compress_id != 0)

	if (s->session->compress_meth != 0)

		{

		al=SSL_AD_INTERNAL_ERROR;

		SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION);

ssl/ssl.h

+2 −0
Original line number Diff line number Diff line
@@ -2077,6 +2077,7 @@ void ERR_load_SSL_strings(void); 
#define SSL_R_CIPHER_TABLE_SRC_ERROR			 139

#define SSL_R_CLIENTHELLO_TLSEXT			 226

#define SSL_R_COMPRESSED_LENGTH_TOO_LONG		 140

#define SSL_R_COMPRESSION_DISABLED			 343

#define SSL_R_COMPRESSION_FAILURE			 141

#define SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE	 307

#define SSL_R_COMPRESSION_LIBRARY_ERROR			 142
@@ -2171,6 +2172,7 @@ void ERR_load_SSL_strings(void); 
#define SSL_R_NULL_SSL_CTX				 195

#define SSL_R_NULL_SSL_METHOD_PASSED			 196

#define SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED		 197

#define SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED 344

#define SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE		 297

#define SSL_R_OPAQUE_PRF_INPUT_TOO_LONG			 327

#define SSL_R_PACKET_LENGTH_TOO_LONG			 198

ssl/ssl_err.c

+2 −0
Original line number Diff line number Diff line
@@ -329,6 +329,7 @@ static ERR_STRING_DATA SSL_str_reasons[]= 
{ERR_REASON(SSL_R_CIPHER_TABLE_SRC_ERROR),"cipher table src error"},

{ERR_REASON(SSL_R_CLIENTHELLO_TLSEXT)    ,"clienthello tlsext"},

{ERR_REASON(SSL_R_COMPRESSED_LENGTH_TOO_LONG),"compressed length too long"},

{ERR_REASON(SSL_R_COMPRESSION_DISABLED)  ,"compression disabled"},

{ERR_REASON(SSL_R_COMPRESSION_FAILURE)   ,"compression failure"},

{ERR_REASON(SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE),"compression id not within private range"},

{ERR_REASON(SSL_R_COMPRESSION_LIBRARY_ERROR),"compression library error"},
@@ -423,6 +424,7 @@ static ERR_STRING_DATA SSL_str_reasons[]= 
{ERR_REASON(SSL_R_NULL_SSL_CTX)          ,"null ssl ctx"},

{ERR_REASON(SSL_R_NULL_SSL_METHOD_PASSED),"null ssl method passed"},

{ERR_REASON(SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED),"old session cipher not returned"},

{ERR_REASON(SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED),"old session compression algorithm not returned"},

{ERR_REASON(SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE),"only tls allowed in fips mode"},

{ERR_REASON(SSL_R_OPAQUE_PRF_INPUT_TOO_LONG),"opaque PRF input too long"},

{ERR_REASON(SSL_R_PACKET_LENGTH_TOO_LONG),"packet length too long"},