Include a more meaningful error message when rejecting legacy renegotiation

ssl/ssl.h

@@ -1954,7 +1954,9 @@ void ERR_load_SSL_strings(void);
 #define SSL_F_SSL_LOAD_CLIENT_CA_FILE			 185
 #define SSL_F_SSL_NEW					 186
 #define SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT	 300
+#define SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT		 302
 #define SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT	 301
+#define SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT		 303
 #define SSL_F_SSL_PEEK					 270
 #define SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT		 281
 #define SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT		 282
@@ -2251,6 +2253,7 @@ void ERR_load_SSL_strings(void);
 #define SSL_R_UNKNOWN_REMOTE_ERROR_TYPE			 253
 #define SSL_R_UNKNOWN_SSL_VERSION			 254
 #define SSL_R_UNKNOWN_STATE				 255
+#define SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED	 338
 #define SSL_R_UNSUPPORTED_CIPHER			 256
 #define SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM		 257
 #define SSL_R_UNSUPPORTED_DIGEST_TYPE			 326

ssl/ssl_err.c

@@ -226,7 +226,9 @@ static ERR_STRING_DATA SSL_str_functs[]=
 {ERR_FUNC(SSL_F_SSL_LOAD_CLIENT_CA_FILE),	"SSL_load_client_CA_file"},
 {ERR_FUNC(SSL_F_SSL_NEW),	"SSL_new"},
 {ERR_FUNC(SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT),	"SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT"},
+{ERR_FUNC(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT),	"SSL_PARSE_CLIENTHELLO_TLSEXT"},
 {ERR_FUNC(SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT),	"SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT"},
+{ERR_FUNC(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT),	"SSL_PARSE_SERVERHELLO_TLSEXT"},
 {ERR_FUNC(SSL_F_SSL_PEEK),	"SSL_peek"},
 {ERR_FUNC(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT),	"SSL_PREPARE_CLIENTHELLO_TLSEXT"},
 {ERR_FUNC(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT),	"SSL_PREPARE_SERVERHELLO_TLSEXT"},
@@ -526,6 +528,7 @@ static ERR_STRING_DATA SSL_str_reasons[]=
 {ERR_REASON(SSL_R_UNKNOWN_REMOTE_ERROR_TYPE),"unknown remote error type"},
 {ERR_REASON(SSL_R_UNKNOWN_SSL_VERSION)   ,"unknown ssl version"},
 {ERR_REASON(SSL_R_UNKNOWN_STATE)         ,"unknown state"},
+{ERR_REASON(SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED),"unsafe legacy renegotiation disabled"},
 {ERR_REASON(SSL_R_UNSUPPORTED_CIPHER)    ,"unsupported cipher"},
 {ERR_REASON(SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM),"unsupported compression algorithm"},
 {ERR_REASON(SSL_R_UNSUPPORTED_DIGEST_TYPE),"unsupported digest type"},

ssl/t1_lib.c

@@ -636,6 +636,7 @@ int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
 			{
 			/* We should always see one extension: the renegotiate extension */
 			*al = SSL_AD_ILLEGAL_PARAMETER; /* is this the right alert? */
+			SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
 			return 0;
 			}
 		return 1;
@@ -965,6 +966,7 @@ int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
  	if (s->new_session && !renegotiate_seen
  		&& !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
  		{
+		SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
  		*al = SSL_AD_ILLEGAL_PARAMETER; /* is this the right alert? */
  		return 0;
  		}
@@ -992,6 +994,7 @@ int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
 			{
 			/* We should always see one extension: the renegotiate extension */
 			*al = SSL_AD_ILLEGAL_PARAMETER; /* is this the right alert? */
+			SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
 			return 0;
 			}
 		return 1;
@@ -1130,6 +1133,7 @@ int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, in
 		&& !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
 		{
 		*al = SSL_AD_ILLEGAL_PARAMETER; /* is this the right alert? */
+		SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
 		return 0;
 		}