NCONF_get_number() has no error checking at all. As a replacement,

NCONF_get_number_e() is defined (_e for "error checking") and is
promoted strongly.  The old NCONF_get_number is kept around for
binary backward compatibility.

crypto/conf/conf.h

@@ -136,10 +136,17 @@ int NCONF_load_fp(CONF *conf, FILE *fp,long *eline);
 int NCONF_load_bio(CONF *conf, BIO *bp,long *eline);
 STACK_OF(CONF_VALUE) *NCONF_get_section(CONF *conf,char *section);
 char *NCONF_get_string(CONF *conf,char *group,char *name);
-long NCONF_get_number(CONF *conf,char *group,char *name);
+int NCONF_get_number_e(CONF *conf,char *group,char *name,long *result);
 int NCONF_dump_fp(CONF *conf, FILE *out);
 int NCONF_dump_bio(CONF *conf, BIO *out);
 
+#if 0 /* The following function has no error checking,
+	 and should therefore be avoided */
+long NCONF_get_number(CONF *conf,char *group,char *name);
+#else
+#define NCONF_get_number(c,g,n,r) NCONF_get_number_e(c,g,n,r);
+#endif
+
 
 /* BEGIN ERROR CODES */
 /* The following lines are auto generated by the script mkerr.pl. Any changes
@@ -156,6 +163,7 @@ int NCONF_dump_bio(CONF *conf, BIO *out);
 #define CONF_F_NCONF_DUMP_BIO				 105
 #define CONF_F_NCONF_DUMP_FP				 106
 #define CONF_F_NCONF_GET_NUMBER				 107
+#define CONF_F_NCONF_GET_NUMBER_E			 112
 #define CONF_F_NCONF_GET_SECTION			 108
 #define CONF_F_NCONF_GET_STRING				 109
 #define CONF_F_NCONF_LOAD_BIO				 110
@@ -169,6 +177,7 @@ int NCONF_dump_bio(CONF *conf, BIO *out);
 #define CONF_R_NO_CONF					 105
 #define CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE		 106
 #define CONF_R_NO_SECTION				 107
+#define CONF_R_NO_VALUE					 108
 #define CONF_R_UNABLE_TO_CREATE_NEW_SECTION		 103
 #define CONF_R_VARIABLE_HAS_NO_VALUE			 104
 

crypto/conf/conf_api.c

@@ -153,6 +153,9 @@ char *_CONF_get_string(CONF *conf, char *section, char *name)
 		return(Getenv(name));
 	}
 
+#if 0 /* There's no way to provide error checking with this function, so
+	 force implementors of the higher levels to get a string and read
+	 the number themselves. */
 long _CONF_get_number(CONF *conf, char *section, char *name)
 	{
 	char *str;
@@ -169,6 +172,7 @@ long _CONF_get_number(CONF *conf, char *section, char *name)
 		str++;
 		}
 	}
+#endif
 
 int _CONF_new_data(CONF *conf)
 	{

crypto/conf/conf_err.c

@@ -73,6 +73,7 @@ static ERR_STRING_DATA CONF_str_functs[]=
 {ERR_PACK(0,CONF_F_NCONF_DUMP_BIO,0),	"NCONF_dump_bio"},
 {ERR_PACK(0,CONF_F_NCONF_DUMP_FP,0),	"NCONF_dump_fp"},
 {ERR_PACK(0,CONF_F_NCONF_GET_NUMBER,0),	"NCONF_get_number"},
+{ERR_PACK(0,CONF_F_NCONF_GET_NUMBER_E,0),	"NCONF_get_number_e"},
 {ERR_PACK(0,CONF_F_NCONF_GET_SECTION,0),	"NCONF_get_section"},
 {ERR_PACK(0,CONF_F_NCONF_GET_STRING,0),	"NCONF_get_string"},
 {ERR_PACK(0,CONF_F_NCONF_LOAD_BIO,0),	"NCONF_load_bio"},
@@ -89,6 +90,7 @@ static ERR_STRING_DATA CONF_str_reasons[]=
 {CONF_R_NO_CONF                          ,"no conf"},
 {CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE  ,"no conf or environment variable"},
 {CONF_R_NO_SECTION                       ,"no section"},
+{CONF_R_NO_VALUE                         ,"no value"},
 {CONF_R_UNABLE_TO_CREATE_NEW_SECTION     ,"unable to create new section"},
 {CONF_R_VARIABLE_HAS_NO_VALUE            ,"variable has no value"},
 {0,NULL}

crypto/conf/conf_lib.c

@@ -156,13 +156,21 @@ char *CONF_get_string(LHASH *conf,char *group,char *name)
 long CONF_get_number(LHASH *conf,char *group,char *name)
 	{
 	CONF ctmp;
+	int status;
+	long result = 0;
 
 	if (default_CONF_method == NULL)
 		default_CONF_method = NCONF_default();
 
 	default_CONF_method->init(&ctmp);
 	ctmp.data = conf;
-	return NCONF_get_number(&ctmp, group, name);
+	status = NCONF_get_number_e(&ctmp, group, name, &result);
+	if (status == 0)
+		{
+		/* This function does not believe in errors... */
+		ERR_get_error();
+		}
+	return result;
 	}
 
 void CONF_free(LHASH *conf)
@@ -322,25 +330,33 @@ char *NCONF_get_string(CONF *conf,char *group,char *name)
                         CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE);
 		return NULL;
 		}
+	CONFerr(CONF_F_NCONF_GET_STRING,
+		CONF_R_NO_VALUE);
 	return NULL;
 	}
 
-long NCONF_get_number(CONF *conf,char *group,char *name)
+int NCONF_get_number_e(CONF *conf,char *group,char *name,long *result)
 	{
-#if 0 /* As with _CONF_get_string(), we rely on the possibility of finding
-         an environment variable with a suitable name.  Unfortunately, there's
-         no way with the current API to see if we found one or not...
-         The meaning of this is that if a number is not found anywhere, it
-         will always default to 0. */
-	if (conf == NULL)
+	char *str;
+
+	if (result == NULL)
 		{
-		CONFerr(CONF_F_NCONF_GET_NUMBER,
-                        CONF_R_NO_CONF_OR_ENVIRONMENT_VARIABLE);
+		CONFerr(CONF_F_NCONF_GET_NUMBER_E,ERR_R_PASSED_NULL_PARAMETER);
 		return 0;
 		}
-#endif
-	
-	return _CONF_get_number(conf, group, name);
+
+	str = NCONF_get_string(conf,group,name);
+
+	if (str == NULL)
+		return 0;
+
+	for (;conf->meth->is_number(conf, *str);)
+		{
+		*result = (*result)*10 + conf->meth->to_int(conf, *str);
+		str++;
+		}
+
+	return 1;
 	}
 
 #ifndef NO_FP_API
@@ -369,3 +385,19 @@ int NCONF_dump_bio(CONF *conf, BIO *out)
 	return conf->meth->dump(conf, out);
 	}
 
+/* This function should be avoided */
+#undef NCONF_get_number
+long NCONF_get_number(CONF *conf,char *group,char *name)
+	{
+	int status;
+	long ret=0;
+
+	status = NCONF_get_number_e(conf, group, name, &ret);
+	if (status == 0)
+		{
+		/* This function does not believe in errors... */
+		ERR_get_error();
+		}
+	return ret;
+	}
+