Provide ASN1_TYPE_{,un}pack_sequence().

These are internal only for now.

Based on OpenSSL 1.1.1d.

ok inoguchi@

2 files changed, 36 insertions, 2 deletions

diff --git a/src/lib/libcrypto/asn1/a_type.c b/src/lib/libcrypto/asn1/a_type.c
index 11d38300d6..a18ffe66ba 100644
--- a/src/lib/libcrypto/asn1/a_type.c
+++ b/src/lib/libcrypto/asn1/a_type.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: a_type.c,v 1.20 2018/04/25 11:48:21 tb Exp $ */
+/* $OpenBSD: a_type.c,v 1.21 2019/10/24 16:36:10 jsing Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -154,3 +154,34 @@ ASN1_TYPE_cmp(const ASN1_TYPE *a, const ASN1_TYPE *b)
 
         return result;
 }
+
+ASN1_TYPE *
+ASN1_TYPE_pack_sequence(const ASN1_ITEM *it, void *s, ASN1_TYPE **t)
+{
+        ASN1_OCTET_STRING *oct;
+        ASN1_TYPE *rt;
+
+        if ((oct = ASN1_item_pack(s, it, NULL)) == NULL)
+                return NULL;
+
+        if (t != NULL && *t != NULL) {
+                rt = *t;
+        } else {
+                if ((rt = ASN1_TYPE_new()) == NULL) {
+                        ASN1_OCTET_STRING_free(oct);
+                        return NULL;
+                }
+                if (t != NULL)
+                        *t = rt;
+        }
+        ASN1_TYPE_set(rt, V_ASN1_SEQUENCE, oct);
+        return rt;
+}
+
+void *
+ASN1_TYPE_unpack_sequence(const ASN1_ITEM *it, const ASN1_TYPE *t)
+{
+        if (t == NULL || t->type != V_ASN1_SEQUENCE || t->value.sequence == NULL)
+                return NULL;
+        return ASN1_item_unpack(t->value.sequence, it);
+}
diff --git a/src/lib/libcrypto/asn1/asn1_locl.h b/src/lib/libcrypto/asn1/asn1_locl.h
index 5ade6c7e3f..39779d9377 100644
--- a/src/lib/libcrypto/asn1/asn1_locl.h
+++ b/src/lib/libcrypto/asn1/asn1_locl.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: asn1_locl.h,v 1.11 2018/08/24 20:22:15 tb Exp $ */
+/* $OpenBSD: asn1_locl.h,v 1.12 2019/10/24 16:36:10 jsing Exp $ */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2006.
  */
@@ -60,6 +60,9 @@ __BEGIN_HIDDEN_DECLS
 
 /* Internal ASN1 structures and functions: not for application use */
 
+ASN1_TYPE *ASN1_TYPE_pack_sequence(const ASN1_ITEM *it, void *s, ASN1_TYPE **t);
+void *ASN1_TYPE_unpack_sequence(const ASN1_ITEM *it, const ASN1_TYPE *t);
+
 /* ASN1 print context structure */
 
 struct asn1_pctx_st {