Fix an error path leak in int X509_ATTRIBUTE_set1_data()

[openssl.git] / crypto / objects / o_names.c

diff --git a/crypto/objects/o_names.c b/crypto/objects/o_names.c
index f7216f210e70105923701b189ef09f6e3144d1d1..c655a908ddb8560cf76f73570a9f71d39d624d7d 100644 (file)
--- a/crypto/objects/o_names.c
+++ b/crypto/objects/o_names.c
@@ -1,3 +1,12 @@
+/*
+ * Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -10,15 +19,23 @@
 #include "obj_lcl.h"
 
 /*
- * Later versions of DEC C has started to add lnkage information to certain
- * functions, which makes it tricky to use them as values to regular function
- * pointers.  One way is to define a macro that takes care of casting them
- * correctly.
+ * We define this wrapper for two reasons. Firstly, later versions of
+ * DEC C add linkage information to certain functions, which makes it
+ * tricky to use them as values to regular function pointers.
+ * Secondly, in the EDK2 build environment, the strcmp function is
+ * actually an external function (AsciiStrCmp) with the Microsoft ABI,
+ * so we can't transparently assign function pointers to it.
+ * Arguably the latter is a stupidity of the UEFI environment, but
+ * since the wrapper solves the DEC C issue too, let's just use the
+ * same solution.
  */
-#ifdef OPENSSL_SYS_VMS_DECC
-# define OPENSSL_strcmp (int (*)(const char *,const char *))strcmp
+#if defined(OPENSSL_SYS_VMS_DECC) || defined(OPENSSL_SYS_UEFI)
+static int obj_strcmp(const char *a, const char *b)
+{
+    return strcmp(a, b);
+}
 #else
-# define OPENSSL_strcmp strcmp
+#define obj_strcmp strcmp
 #endif
 
 /*
@@ -82,8 +99,8 @@ int OBJ_NAME_new_index(unsigned long (*hash_func) (const char *),
             OBJerr(OBJ_F_OBJ_NAME_NEW_INDEX, ERR_R_MALLOC_FAILURE);
             return (0);
         }
-        name_funcs->hash_func = lh_strhash;
-        name_funcs->cmp_func = OPENSSL_strcmp;
+        name_funcs->hash_func = OPENSSL_LH_strhash;
+        name_funcs->cmp_func = obj_strcmp;
         CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
         sk_NAME_FUNCS_push(name_funcs_stack, name_funcs);
         CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
@@ -124,7 +141,7 @@ static unsigned long obj_name_hash(const OBJ_NAME *a)
             sk_NAME_FUNCS_value(name_funcs_stack,
                                 a->type)->hash_func(a->name);
     } else {
-        ret = lh_strhash(a->name);
+        ret = OPENSSL_LH_strhash(a->name);
     }
     ret ^= a->type;
     return (ret);
@@ -174,7 +191,7 @@ int OBJ_NAME_add(const char *name, int type, const char *data)
     onp = OPENSSL_malloc(sizeof(*onp));
     if (onp == NULL) {
         /* ERROR */
-        return (0);
+        return 0;
     }
 
     onp->name = name;
@@ -199,10 +216,11 @@ int OBJ_NAME_add(const char *name, int type, const char *data)
     } else {
         if (lh_OBJ_NAME_error(names_lh)) {
             /* ERROR */
-            return (0);
+            OPENSSL_free(onp);
+            return 0;
         }
     }
-    return (1);
+    return 1;
 }
 
 int OBJ_NAME_remove(const char *name, int type)
@@ -234,31 +252,30 @@ int OBJ_NAME_remove(const char *name, int type)
         return (0);
 }
 
-struct doall {
+typedef struct {
     int type;
     void (*fn) (const OBJ_NAME *, void *arg);
     void *arg;
-};
+} OBJ_DOALL;
 
-static void do_all_fn_doall_arg(const OBJ_NAME *name, struct doall *d)
+static void do_all_fn(const OBJ_NAME *name, OBJ_DOALL *d)
 {
     if (name->type == d->type)
         d->fn(name, d->arg);
 }
 
-static IMPLEMENT_LHASH_DOALL_ARG_FN(do_all_fn, const OBJ_NAME, struct doall)
+IMPLEMENT_LHASH_DOALL_ARG_CONST(OBJ_NAME, OBJ_DOALL);
 
 void OBJ_NAME_do_all(int type, void (*fn) (const OBJ_NAME *, void *arg),
                      void *arg)
 {
-    struct doall d;
+    OBJ_DOALL d;
 
     d.type = type;
     d.fn = fn;
     d.arg = arg;
 
-    lh_OBJ_NAME_doall_arg(names_lh, LHASH_DOALL_ARG_FN(do_all_fn),
-                          struct doall, &d);
+    lh_OBJ_NAME_doall_OBJ_DOALL(names_lh, do_all_fn, &d);
 }
 
 struct doall_sorted {
@@ -320,8 +337,6 @@ static void names_lh_free_doall(OBJ_NAME *onp)
         OBJ_NAME_remove(onp->name, onp->type);
 }
 
-static IMPLEMENT_LHASH_DOALL_FN(names_lh_free, OBJ_NAME)
-
 static void name_funcs_free(NAME_FUNCS *ptr)
 {
     OPENSSL_free(ptr);
@@ -338,7 +353,7 @@ void OBJ_NAME_cleanup(int type)
     down_load = lh_OBJ_NAME_get_down_load(names_lh);
     lh_OBJ_NAME_set_down_load(names_lh, 0);
 
-    lh_OBJ_NAME_doall(names_lh, LHASH_DOALL_FN(names_lh_free));
+    lh_OBJ_NAME_doall(names_lh, names_lh_free_doall);
     if (type < 0) {
         lh_OBJ_NAME_free(names_lh);
         sk_NAME_FUNCS_pop_free(name_funcs_stack, name_funcs_free);