asn1_build_known_oid() includes ASN1_OID tag and length

src/libstrongswan/asn1/asn1.c

@@ -224,7 +224,7 @@ int asn1_known_oid(chunk_t object)
 /*
  * Defined in header.
  */
-chunk_t asn1_get_known_oid(int n)
+chunk_t asn1_build_known_oid(int n)
 {
 	chunk_t oid;
 	int i;
@@ -235,7 +235,10 @@ chunk_t asn1_get_known_oid(int n)
 	}
 	
 	i = oid_names[n].level + 1;
-	oid = chunk_alloc(i);
+	oid = chunk_alloc(2 + i);
+	oid.ptr[0] = ASN1_OID;
+	oid.ptr[1] = i;
+
 	do
 	{
 		if (oid_names[n].level >= i)

src/libstrongswan/asn1/asn1.h

@@ -107,12 +107,12 @@ chunk_t asn1_algorithmIdentifier(int oid);
 int asn1_known_oid(chunk_t object);
 
 /**
- * Converts an known OID index to ASN.1 OID
+ * Converts a known OID index to an ASN.1 OID
  *
  * @param n			index into the oid_names[] table
  * @return			allocated OID chunk, chunk_empty if index out of range
  */
-chunk_t asn1_get_known_oid(int n);
+chunk_t asn1_build_known_oid(int n);
 
 /**
  * Returns the length of an ASN.1 object