X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=secnet.git;a=blobdiff_plain;f=conffile.c;h=24d7e25b154e1ec30eaf8b48ce14b9179007b713;hp=db7c58e31b447beb07d89dc1716ae2fd0ad38203;hb=3ff31eda6e86ffc7d276635fe117c7408a72b719;hpb=27f5042b0435d26ae98b22f8e42115e44afe53bc

diff --git a/conffile.c b/conffile.c
index db7c58e..24d7e25 100644
--- a/conffile.c
+++ b/conffile.c
@@ -3,6 +3,8 @@
 /* #define DUMP_PARSE_TREE */
 
 #include "secnet.h"
+#include <assert.h>
+#include <limits.h>
 #include <stdio.h>
 #include <string.h>
 #include "conffile.h"
@@ -33,7 +35,7 @@ struct dict {
     struct dict *parent;
     struct searchlist *search;
     struct entry *entries;
-    uint32_t size;
+    int32_t size;
 };
 
 static struct atomlist *atoms=NULL;
@@ -152,7 +154,7 @@ static void ptree_mangle(struct p_node *t)
 
 #ifdef DUMP_PARSE_TREE
 /* Convert a node type to a string, for parse tree dump */
-static string_t ntype(uint32_t type)
+static const char *ntype(uint32_t type)
 {
     switch(type) {
     case T_STRING:     return "T_STRING";
@@ -171,20 +173,20 @@ static string_t ntype(uint32_t type)
     return "**unknown**";
 }
 
-static void ptree_indent(uint32_t amount)
+static void ptree_indent(int amount)
 {
-    uint32_t i;
+    int i;
     for (i=0; i<amount; i++) printf("  . ");
 }
 
-static void ptree_dump(struct p_node *n, uint32_t d)
+static void ptree_dump(struct p_node *n, int d)
 {
     if (!n) {
 	printf("NULL\n");
 	return;
     }
     
-    if (n->type<10) {
+    if (T_IS_PRIMITIVE(n->type)) {
 	switch(n->type) {
 	case T_STRING: printf("T_STRING: \"%s\" (%s line %d)\n",
 			      n->data.string,n->loc.file,n->loc.line); break;
@@ -195,6 +197,7 @@ static void ptree_dump(struct p_node *n, uint32_t d)
 	default:       printf("**unknown primitive type**\n"); break;
 	}
     } else {
+	assert(d<10000);
 	printf("%s: (%s line %d)\n",ntype(n->type),n->loc.file,n->loc.line);
 	ptree_indent(d);
 	printf("  |-");	ptree_dump(n->l, d+1);
@@ -558,11 +561,11 @@ list_t *list_new(void)
     return NULL;
 }
 
-uint32_t list_length(list_t *a)
+int32_t list_length(const list_t *a)
 {
-    uint32_t l=0;
-    list_t *i;
-    for (i=a; i; i=i->next) l++;
+    int32_t l=0;
+    const list_t *i;
+    for (i=a; i; i=i->next) { assert(l < INT_MAX); l++; }
     return l;
 }
 
@@ -605,7 +608,7 @@ list_t *list_append(list_t *list, item_t *item)
     return list_append_list(list,l);
 }
 
-item_t *list_elem(list_t *l, uint32_t index)
+item_t *list_elem(list_t *l, int32_t index)
 {
     if (!l) return NULL;
     if (index==0) return l->item;
@@ -636,16 +639,10 @@ void add_closure(dict_t *dict, cstring_t name, apply_fn apply)
 void *find_cl_if(dict_t *dict, cstring_t name, uint32_t type,
 		 bool_t fail_if_invalid, cstring_t desc, struct cloc loc)
 {
-    list_t *l;
     item_t *i;
     closure_t *cl;
 
-    l=dict_lookup(dict,name);
-    if (!l) {
-	if (!fail_if_invalid) return NULL;
-	cfgfatal(loc,desc,"closure \"%s\" not found\n",name);
-    }
-    i=list_elem(l,0);
+    i = dict_find_item(dict,name,fail_if_invalid,desc,loc);
     if (i->type!=t_closure) {
 	if (!fail_if_invalid) return NULL;
 	cfgfatal(loc,desc,"\"%s\" must be a closure\n",name);
@@ -670,6 +667,8 @@ item_t *dict_find_item(dict_t *dict, cstring_t key, bool_t required,
 	if (!required) return NULL;
 	cfgfatal(loc,desc,"required parameter \"%s\" not found\n",key);
     }
+    if(list_length(l) != 1)
+	cfgfatal(loc,desc,"parameter \"%s\" has wrong number of values",key);
     i=list_elem(l,0);
     return i;
 }
@@ -685,6 +684,9 @@ string_t dict_read_string(dict_t *dict, cstring_t key, bool_t required,
     if (i->type!=t_string) {
 	cfgfatal(loc,desc,"\"%s\" must be a string\n",key);
     }
+    if (strlen(i->data.string) > INT_MAX/10) {
+	cfgfatal(loc,desc,"\"%s\" is unreasonably long\n",key);
+    }
     r=i->data.string;
     return r;
 }
@@ -700,6 +702,9 @@ uint32_t dict_read_number(dict_t *dict, cstring_t key, bool_t required,
     if (i->type!=t_number) {
 	cfgfatal(loc,desc,"\"%s\" must be a number\n",key);
     }
+    if (i->data.number >= 0x80000000) {
+        cfgfatal(loc,desc,"\"%s\" must fit into a 32-bit signed integer\n",key);
+    }
     r=i->data.number;
     return r;
 }