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authorRomain Forlot <romain.forlot@iot.bzh>2018-05-17 00:26:01 +0200
committerRomain Forlot <romain.forlot@iot.bzh>2018-05-18 13:52:47 +0000
commita68eba948a30885e87f12690ce5d4210629c1e30 (patch)
tree8b282b69404979c570b28d5afa164f6c99e5b44c
parent2acfbf23831472f8a9d61917b1627c5008a63ee2 (diff)
Good usage of strncat and strncpy
This change ensure that there are no write over the destination buffer size Change-Id: Ic213e70fab83dfae39a8ff030c823a6ce68aab64 Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
-rw-r--r--ctl-lib/ctl-action.c27
-rw-r--r--ctl-lib/ctl-config.c39
-rw-r--r--ctl-lib/ctl-lua.c41
-rw-r--r--ctl-lib/ctl-lua.h5
-rw-r--r--ctl-lib/ctl-plugin.c21
5 files changed, 75 insertions, 58 deletions
diff --git a/ctl-lib/ctl-action.c b/ctl-lib/ctl-action.c
index e1329e2..f25e137 100644
--- a/ctl-lib/ctl-action.c
+++ b/ctl-lib/ctl-action.c
@@ -139,29 +139,28 @@ static void ActionDynRequest(AFB_ReqT request) {
void ParseURI(const char *uri, char **first, char **second)
{
- size_t first_len = 0, second_len = 0;
- const char *tmp;
+ char *tmp;
if(! uri || ! first || ! second) {
return;
}
- tmp = strchr(uri, '#');
- first_len = strlen(uri);
-
+ tmp = strdup(uri);
if (!tmp) {
- *first = calloc(1, sizeof(char) * first_len);
- strcpy(*first, uri);
+ *first = NULL;
+ *second = NULL;
+ return;
}
- else {
- second_len = strlen(tmp);
- first_len = first_len - second_len;
- *first = calloc(1, sizeof(char) * first_len);
- *second = calloc(1, sizeof(char) * second_len);
+ *first = tmp;
- strncpy(*first, uri, first_len);
- strncpy(*second, tmp+1, second_len);
+ tmp = strchrnul(tmp, '#');
+ if(tmp[0] == '\0') {
+ *second = NULL;
+ }
+ else {
+ tmp[0] = '\0';
+ *second = &tmp[1];
}
}
diff --git a/ctl-lib/ctl-config.c b/ctl-lib/ctl-config.c
index cac8c75..581440c 100644
--- a/ctl-lib/ctl-config.c
+++ b/ctl-lib/ctl-config.c
@@ -42,12 +42,14 @@ int CtlConfigMagicNew() {
return ((long)rand());
}
- json_object* CtlConfigScan(const char *dirList, const char *prefix) {
- char controlFile [CONTROL_MAXPATH_LEN];
+json_object* CtlConfigScan(const char *dirList, const char *prefix) {
+ char controlFile[CONTROL_MAXPATH_LEN];
const char *binderName = GetBinderName();
- strncpy(controlFile, prefix, strlen(prefix)+1);
- strncat(controlFile, binderName, strlen(binderName));
+ controlFile[CONTROL_MAXPATH_LEN - 1] = '\0';
+
+ strncpy(controlFile, prefix, CONTROL_MAXPATH_LEN - 1);
+ strncat(controlFile, binderName, CONTROL_MAXPATH_LEN - strlen(controlFile) - 1);
// search for default dispatch config file
json_object* responseJ = ScanForConfig(dirList, CTL_SCAN_RECURSIVE, controlFile, ".json");
@@ -57,33 +59,38 @@ int CtlConfigMagicNew() {
char* ConfigSearch(AFB_ApiT apiHandle, json_object *responseJ) {
// We load 1st file others are just warnings
- char filepath[CONTROL_MAXPATH_LEN];
+ size_t p_length;
+ char *filepath;
+ const char *filename;
+ const char*fullpath;
+
for (int index = 0; index < json_object_array_length(responseJ); index++) {
json_object *entryJ = json_object_array_get_idx(responseJ, index);
- char *filename;
- char*fullpath;
int err = wrap_json_unpack(entryJ, "{s:s, s:s !}", "fullpath", &fullpath, "filename", &filename);
if (err) {
AFB_ApiError(apiHandle, "CTL-INIT HOOPs invalid JSON entry= %s", json_object_get_string(entryJ));
}
- if (index == 0) {
- strncpy(filepath, fullpath, strlen(fullpath)+1);
- strncat(filepath, "/", strlen("/"));
- strncat(filepath, filename, strlen(filename));
+ p_length = strlen(fullpath) + 1 + strlen(filename);
+ filepath = malloc(p_length + 1);
+ if (index == 0 && filepath) {
+ strncpy(filepath, fullpath, p_length);
+ strncat(filepath, "/", p_length - strlen(filepath));
+ strncat(filepath, filename, p_length - strlen(filepath));
}
}
json_object_put(responseJ);
- return strndup(filepath, sizeof(filepath));
+ return filepath;
}
char* CtlConfigSearch(AFB_ApiT apiHandle, const char *dirList, const char *prefix) {
// search for default dispatch config file
json_object* responseJ = CtlConfigScan (dirList, prefix);
- if(responseJ) return ConfigSearch(apiHandle, responseJ);
+ if(responseJ)
+ return ConfigSearch(apiHandle, responseJ);
return NULL;
}
@@ -172,6 +179,7 @@ json_object* LoadAdditionalsFiles(AFB_ApiT apiHandle, CtlConfigT *ctlHandle, con
json_object* CtlUpdateSectionConfig(AFB_ApiT apiHandle, CtlConfigT *ctlHandle, const char *key, json_object *sectionJ, json_object *filesJ) {
json_object *sectionArrayJ;
+ char *oneFile;
const char *bindingPath = GetBindingDirPath(apiHandle);
if(! json_object_is_type(sectionJ, json_type_array)) {
@@ -196,7 +204,7 @@ json_object* CtlUpdateSectionConfig(AFB_ApiT apiHandle, CtlConfigT *ctlHandle, c
AFB_ApiError(apiHandle, "No config files found in search path. No changes has been made\n -- %s\n -- %s", CONTROL_CONFIG_PATH, bindingPath);
return sectionArrayJ;
}
- const char *oneFile = ConfigSearch(apiHandle, responseJ);
+ oneFile = ConfigSearch(apiHandle, responseJ);
if (oneFile) {
json_object *newSectionJ, *newFileJ = json_object_from_file(oneFile);
json_object_object_get_ex(newFileJ, key, &newSectionJ);
@@ -215,12 +223,13 @@ json_object* CtlUpdateSectionConfig(AFB_ApiT apiHandle, CtlConfigT *ctlHandle, c
AFB_ApiError(apiHandle, "No config files found in search path. No changes has been made\n -- %s\n -- %s", CONTROL_CONFIG_PATH, bindingPath);
return sectionArrayJ;
}
- const char *oneFile = ConfigSearch(apiHandle, responseJ);
+ oneFile = ConfigSearch(apiHandle, responseJ);
json_object *newSectionJ = json_object_from_file(oneFile);
LoadAdditionalsFiles(apiHandle, ctlHandle, key, newSectionJ);
wrap_json_optarray_for_all(newSectionJ, wrap_json_array_add, sectionArrayJ);
}
+ free(oneFile);
return sectionArrayJ;
}
diff --git a/ctl-lib/ctl-lua.c b/ctl-lib/ctl-lua.c
index c2f2376..449ae09 100644
--- a/ctl-lib/ctl-lua.c
+++ b/ctl-lib/ctl-lua.c
@@ -738,13 +738,14 @@ int LuaLoadScript(const char *luaScriptPath) {
}
static int LuaDoScript(json_object *queryJ, CtlSourceT *source) {
- const char *uid = NULL, *func = NULL;
- char luaScriptPath[CONTROL_MAXPATH_LEN];
- char *filename, *fullpath;
+ const char *uid = NULL, *func = NULL, *filename = NULL, *fullpath = NULL;
+ char *luaScriptPath = NULL;
int index, err = 0;
+ size_t p_length = 0;
json_object *argsJ = NULL;
static json_object *luaScriptPathJ = NULL;
+
if (!queryJ) {
return -1;
}
@@ -756,15 +757,20 @@ static int LuaDoScript(json_object *queryJ, CtlSourceT *source) {
"args", &argsJ);
if (err) {
+ AFB_ApiError(source->api, "LUA-DOSCRIPT-SCAN: Miss something in JSON object uid|[spath]|action|[args]: %s", json_object_get_string(queryJ));
return -1;
}
- // search for filename=script in CONTROL_LUA_PATH
+ // search for filename=uid*.lua or fallback on bindername*.lua in current directory
if (!luaScriptPathJ) {
- strncpy(luaScriptPath, CONTROL_DOSCRIPT_PRE, strlen(CONTROL_DOSCRIPT_PRE) + 1);
- strncat(luaScriptPath, "-", strlen("-"));
- strncat(luaScriptPath, uid, strlen(uid));
- luaScriptPathJ = ScanForConfig(luaScriptPath, CTL_SCAN_RECURSIVE, luaScriptPath, ".lua");
+ luaScriptPathJ = ScanForConfig(".", CTL_SCAN_RECURSIVE, uid, ".lua");
+ if (!luaScriptPathJ)
+ luaScriptPathJ = ScanForConfig(".", CTL_SCAN_RECURSIVE, GetBinderName(), ".lua");
+ }
+
+ if(!luaScriptPathJ) {
+ AFB_ApiError(source->api, "LUA-DOSCRIPT-SCAN: No script found");
+ return -1;
}
for (index = 0; index < json_object_array_length(luaScriptPathJ); index++) {
@@ -773,14 +779,17 @@ static int LuaDoScript(json_object *queryJ, CtlSourceT *source) {
err = wrap_json_unpack(entryJ, "{s:s, s:s !}", "fullpath", &fullpath, "filename", &filename);
if (err) {
AFB_ApiError(source->api, "LUA-DOSCRIPT-SCAN:HOOPs invalid config file path = %s", json_object_get_string(entryJ));
- return -2;
+ return -1;
}
// Ignoring other found script. Only take the first one.
if (!index) {
- strncpy(luaScriptPath, fullpath, strlen(fullpath) + 1);
- strncat(luaScriptPath, "/", strlen("/"));
- strncat(luaScriptPath, filename, strlen(filename));
+ p_length = strlen(fullpath) + 1 + strlen(filename);
+ luaScriptPath = malloc(p_length + 1);
+
+ strncpy(luaScriptPath, fullpath, CONTROL_MAXPATH_LEN - 1);
+ strncat(luaScriptPath, "/", CONTROL_MAXPATH_LEN - strlen(luaScriptPath) - 1);
+ strncat(luaScriptPath, filename, CONTROL_MAXPATH_LEN - strlen(luaScriptPath) - 1);
}
}
@@ -792,13 +801,13 @@ static int LuaDoScript(json_object *queryJ, CtlSourceT *source) {
// if no func name given try to deduct from filename
if (!func && (func = (char*) GetMidleName(filename)) != NULL) {
- strncpy(luaScriptPath, "_", strlen("_") + 1);
- strncat(luaScriptPath, func, strlen(func));
+ strncpy(luaScriptPath, "_", CONTROL_MAXPATH_LEN - 1);
+ strncat(luaScriptPath, func, CONTROL_MAXPATH_LEN - strlen(luaScriptPath) - 1);
func = luaScriptPath;
}
if (!func) {
AFB_ApiError(source->api, "LUA-DOSCRIPT:FAIL to deduct funcname from %s", filename);
- return -5;
+ return -1;
}
// load function (should exist in CONTROL_PATH_LUA
@@ -807,7 +816,7 @@ static int LuaDoScript(json_object *queryJ, CtlSourceT *source) {
// Push AFB client context on the stack
LuaAfbSourceT *afbSource = LuaSourcePush(luaState, source);
if (!afbSource)
- return -6;
+ return -1;
return 0;
}
diff --git a/ctl-lib/ctl-lua.h b/ctl-lib/ctl-lua.h
index e1c88f6..ba40991 100644
--- a/ctl-lib/ctl-lua.h
+++ b/ctl-lib/ctl-lua.h
@@ -29,11 +29,6 @@ extern "C" {
#define _GNU_SOURCE
#endif
-// prefix start debug script
-#ifndef CONTROL_DOSCRIPT_PRE
-#define CONTROL_DOSCRIPT_PRE "debug"
-#endif
-
// default event name used by LUA
#ifndef CONTROL_LUA_EVENT
#define CONTROL_LUA_EVENT "luaevt"
diff --git a/ctl-lib/ctl-plugin.c b/ctl-lib/ctl-plugin.c
index 0029b68..d20950f 100644
--- a/ctl-lib/ctl-plugin.c
+++ b/ctl-lib/ctl-plugin.c
@@ -112,9 +112,12 @@ static int PluginLoadCOne(AFB_ApiT apiHandle, const char *pluginpath, json_objec
int Lua2cAddOne(luaL_Reg *l2cFunc, const char* l2cName, int index) {
if(ctlPlugin->ctlL2cFunc->l2cCount)
{index += ctlPlugin->ctlL2cFunc->l2cCount+1;}
- char funcName[CONTROL_MAXPATH_LEN];
- strncpy(funcName, "lua2c_", strlen ("lua2c_")+1);
- strncat(funcName, l2cName, strlen (l2cName));
+ char *funcName;
+ size_t p_length = 6 + strlen(l2cName);
+ funcName = malloc(p_length + 1);
+
+ strncpy(funcName, "lua2c_", p_length);
+ strncat(funcName, l2cName, p_length - strlen (funcName));
Lua2cFunctionT l2cFunction = (Lua2cFunctionT) dlsym(dlHandle, funcName);
if (!l2cFunction) {
@@ -194,6 +197,8 @@ static int LoadFoundPlugins(AFB_ApiT apiHandle, json_object *scanResult, json_ob
size_t len;
json_object *object = NULL;
+ pluginpath[CONTROL_MAXPATH_LEN - 1] = '\0';
+
if (!json_object_is_type(scanResult, json_type_array))
return -1;
@@ -210,13 +215,13 @@ static int LoadFoundPlugins(AFB_ApiT apiHandle, json_object *scanResult, json_ob
return -1;
}
- /* Make sure you don't load two found libraries */
ext = strrchr(filename, '.');
- strncpy(pluginpath, fullpath, strlen (fullpath)+1);
- strncat(pluginpath, "/", strlen ("/"));
- strncat(pluginpath, filename, strlen (filename));
+ strncpy(pluginpath, fullpath, CONTROL_MAXPATH_LEN - 1);
+ strncat(pluginpath, "/", CONTROL_MAXPATH_LEN - strlen(pluginpath) - 1);
+ strncat(pluginpath, filename, CONTROL_MAXPATH_LEN - strlen (pluginpath) - 1);
if(!strcasecmp(ext, CTL_PLUGIN_EXT)) {
+ /* Make sure you don't load two found libraries */
if(ext && !strcasecmp(ext, CTL_PLUGIN_EXT) && i > 0) {
AFB_ApiWarning(apiHandle, "Plugin multiple instances in searchpath will use %s/%s", fullpath, filename);
return 0;
@@ -259,7 +264,7 @@ static char *GetDefaultSearchPath(AFB_ApiT apiHandle)
strncat(searchPath, CONTROL_PLUGIN_PATH, CTL_PLGN_len);
}
- strncat(searchPath, ":", 1);
+ strncat(searchPath, ":", sizeof(searchPath) - 1);
strncat(searchPath, bindingPath, bindingPath_len);
return searchPath;