Allow a zero length extension block

[openssl.git] / crypto / asn1 / a_dup.c

diff --git a/crypto/asn1/a_dup.c b/crypto/asn1/a_dup.c
index d98992548ab1b413efefa15021b7b845106dd090..60d3544365feacd33b59643f66302d48a830800e 100644 (file)
--- a/crypto/asn1/a_dup.c
+++ b/crypto/asn1/a_dup.c
@@ -5,21 +5,21 @@
  * This package is an SSL implementation written
  * by Eric Young (eay@cryptsoft.com).
  * The implementation was written so as to conform with Netscapes SSL.
- * 
+ *
  * This library is free for commercial and non-commercial use as long as
  * the following conditions are aheared to.  The following conditions
  * apply to all code found in this distribution, be it the RC4, RSA,
  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  * included with this distribution is covered by the same copyright terms
  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
+ *
  * Copyright remains Eric Young's, and as such any Copyright notices in
  * the code are not to be removed.
  * If this package is used in a product, Eric Young should be given attribution
  * as the author of the parts of the library used.
  * This can be in the form of a textual message at program startup or
  * in documentation (online or textual) provided with the package.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ -34,10 +34,10 @@
  *     Eric Young (eay@cryptsoft.com)"
  *    The word 'cryptographic' can be left out if the rouines from the library
  *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
+ * 4. If you include any Windows specific code (or a derivative thereof) from
  *    the apps directory (application code) you must include an acknowledgement:
  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -49,7 +49,7 @@
  * 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.
- * 
+ *
  * The licence and distribution terms for any publically available version or
  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  * copied and put under another distribution licence
@@ -57,53 +57,61 @@
  */
 
 #include <stdio.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
 #include <openssl/asn1.h>
 
 #ifndef NO_OLD_ASN1
 
 void *ASN1_dup(i2d_of_void *i2d, d2i_of_void *d2i, void *x)
-       {
-       unsigned char *b,*p;
-       const unsigned char *p2;
-       int i;
-       char *ret;
+{
+    unsigned char *b, *p;
+    const unsigned char *p2;
+    int i;
+    char *ret;
 
-       if (x == NULL) return(NULL);
+    if (x == NULL)
+        return (NULL);
 
-       i=i2d(x,NULL);
-       b=OPENSSL_malloc(i+10);
-       if (b == NULL)
-               { ASN1err(ASN1_F_ASN1_DUP,ERR_R_MALLOC_FAILURE); return(NULL); }
-       p= b;
-       i=i2d(x,&p);
-       p2= b;
-       ret=d2i(NULL,&p2,i);
-       OPENSSL_free(b);
-       return(ret);
-       }
+    i = i2d(x, NULL);
+    b = OPENSSL_malloc(i + 10);
+    if (b == NULL) {
+        ASN1err(ASN1_F_ASN1_DUP, ERR_R_MALLOC_FAILURE);
+        return (NULL);
+    }
+    p = b;
+    i = i2d(x, &p);
+    p2 = b;
+    ret = d2i(NULL, &p2, i);
+    OPENSSL_free(b);
+    return (ret);
+}
 
 #endif
 
-/* ASN1_ITEM version of dup: this follows the model above except we don't need
- * to allocate the buffer. At some point this could be rewritten to directly dup
- * the underlying structure instead of doing and encode and decode.
+/*
+ * ASN1_ITEM version of dup: this follows the model above except we don't
+ * need to allocate the buffer. At some point this could be rewritten to
+ * directly dup the underlying structure instead of doing and encode and
+ * decode.
  */
 
 void *ASN1_item_dup(const ASN1_ITEM *it, void *x)
-       {
-       unsigned char *b = NULL;
-       const unsigned char *p;
-       long i;
-       void *ret;
+{
+    unsigned char *b = NULL;
+    const unsigned char *p;
+    long i;
+    void *ret;
 
-       if (x == NULL) return(NULL);
+    if (x == NULL)
+        return (NULL);
 
-       i=ASN1_item_i2d(x,&b,it);
-       if (b == NULL)
-               { ASN1err(ASN1_F_ASN1_ITEM_DUP,ERR_R_MALLOC_FAILURE); return(NULL); }
-       p= b;
-       ret=ASN1_item_d2i(NULL,&p,i, it);
-       OPENSSL_free(b);
-       return(ret);
-       }
+    i = ASN1_item_i2d(x, &b, it);
+    if (b == NULL) {
+        ASN1err(ASN1_F_ASN1_ITEM_DUP, ERR_R_MALLOC_FAILURE);
+        return (NULL);
+    }
+    p = b;
+    ret = ASN1_item_d2i(NULL, &p, i, it);
+    OPENSSL_free(b);
+    return (ret);
+}