asn1_item_embed_new(): don't free an embedded item

The previous change with this intention didn't quite do it.  An
embedded item must not be freed itself, but might potentially contain
non-embedded elements, which must be freed.

So instead of calling ASN1_item_ex_free(), where we can't pass the
combine flag, we call asn1_item_embed_free() directly.

This changes asn1_item_embed_free() from being a static function to
being a private non-static function.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/4578)

diff --git a/crypto/asn1/asn1_int.h b/crypto/asn1/asn1_int.h
new file mode 100644 (file)
index 0000000..c9fd8b1
--- /dev/null
+++ b/crypto/asn1/asn1_int.h
@@ -0,0 +1,63 @@
+/* asn1t.h */
+/*
+ * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
+ * 2006.
+ */
+/* ====================================================================
+ * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+/* Internal ASN1 template structures and functions: not for application use */
+
+void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it,
+                            int combine);

diff --git a/crypto/asn1/tasn_fre.c b/crypto/asn1/tasn_fre.c
index aeea4eff7ab84e68753565f924710fe7b84ed97c..0cf7510ff038f69f6d6e1f4470d14bf4edf4df82 100644 (file)
--- a/crypto/asn1/tasn_fre.c
+++ b/crypto/asn1/tasn_fre.c
@@ -61,9 +61,7 @@
 #include <openssl/asn1.h>
 #include <openssl/asn1t.h>
 #include <openssl/objects.h>
-
-static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it,
-                                   int combine);
+#include "asn1_int.h"
 
 /* Free up an ASN1 structure */
 
@@ -77,8 +75,7 @@ void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
     asn1_item_combine_free(pval, it, 0);
 }
 
-static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it,
-                                   int combine)
+void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine)
 {
     const ASN1_TEMPLATE *tt = NULL, *seqtt;
     const ASN1_EXTERN_FUNCS *ef;

diff --git a/crypto/asn1/tasn_new.c b/crypto/asn1/tasn_new.c
index 1e21da216bc0a987a58f5df19e5669cb300d26cc..6ba90260dab3b97a3eb4fe27a9db0d2765a109b6 100644 (file)
--- a/crypto/asn1/tasn_new.c
+++ b/crypto/asn1/tasn_new.c
@@ -63,6 +63,7 @@
 #include <openssl/err.h>
 #include <openssl/asn1t.h>
 #include <string.h>
+#include "asn1_int.h"
 
 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
                                     int combine);
@@ -199,8 +200,7 @@ static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
     return 1;
 
  memerr2:
-    if (!combine)
-        ASN1_item_ex_free(pval, it);
+    asn1_item_combine_free(pval, it, combine);
  memerr:
     ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ERR_R_MALLOC_FAILURE);
 #ifdef CRYPTO_MDEBUG
@@ -210,8 +210,7 @@ static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
     return 0;
 
  auxerr2:
-    if (!combine)
-        ASN1_item_ex_free(pval, it);
+    asn1_item_combine_free(pval, it, combine);
  auxerr:
     ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ASN1_R_AUX_ERROR);
 #ifdef CRYPTO_MDEBUG