From: Alan T. DeKok <aland@freeradius.org>
Date: Sat, 22 Feb 2025 16:21:14 +0000 (-0500)
Subject: add tag compatible function
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=722ed9e629fc5d03d4bd93e576663fd80494189e;p=thirdparty%2Ffreeradius-server.git

add tag compatible function

some attributes can be encoded in multiple ways, but will all
decode to the same FreeRADIUS data type.  Adding a function
allows us to be more flexible about the input data.
---

diff --git a/src/protocols/der/base.c b/src/protocols/der/base.c
index 23270de7b31..ccde8033fa3 100644
--- a/src/protocols/der/base.c
+++ b/src/protocols/der/base.c
@@ -74,6 +74,16 @@ char const *fr_der_tag_to_str(fr_der_tag_t tag)
 	return fr_table_str_by_value(tag_name_to_number, tag, "???");
 }
 
+static const uint64_t der_tags_compatible[FR_DER_TAG_MAX] = {
+	[FR_DER_TAG_UTC_TIME] = (1 << FR_DER_TAG_GENERALIZED_TIME),
+	[FR_DER_TAG_GENERALIZED_TIME] = (1 << FR_DER_TAG_UTC_TIME),
+};
+
+bool fr_der_tags_compatible(fr_der_tag_t tag1, fr_der_tag_t tag2)
+{
+	return (der_tags_compatible[tag1] & (1 << (uint64_t) tag2)) != 0;
+}
+
 /*
  *	Create a mapping between FR_TYPE_* and valid FR_DER_TAG_*'s
  */
diff --git a/src/protocols/der/der.h b/src/protocols/der/der.h
index 152f8f1ded7..5dab7abf965 100644
--- a/src/protocols/der/der.h
+++ b/src/protocols/der/der.h
@@ -132,6 +132,7 @@ static inline fr_der_attr_flags_t const *fr_der_attr_flags(fr_dict_attr_t const
  */
 fr_der_tag_t fr_type_to_der_tag_default(fr_type_t type);
 bool	fr_type_to_der_tag_valid(fr_type_t type, fr_der_tag_t tag);
+bool	fr_der_tags_compatible(fr_der_tag_t tag1, fr_der_tag_t tag2);
 char	const *fr_der_tag_to_str(fr_der_tag_t tag);
 
 int	fr_der_global_init(void);