+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;
+
+ 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);
+}
+
+#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.
+ */