1 files changed, 53 insertions, 0 deletions
diff --git a/crypto/x509/v3_group_ac.c b/crypto/x509/v3_group_ac.c
new file mode 100644
index 0000000000..9a2b69dece
--- /dev/null
+++ b/crypto/x509/v3_group_ac.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2023 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/x509v3.h>
+#include "ext_dat.h"
+
+static int i2r_GROUP_AC(X509V3_EXT_METHOD *method,
+                        void *su, BIO *out,
+                        int indent)
+{
+    return 1;
+}
+
+static void *r2i_GROUP_AC(X509V3_EXT_METHOD *method,
+                          X509V3_CTX *ctx, const char *value)
+{
+    return ASN1_NULL_new();
+}
+
+static char *i2s_GROUP_AC(const X509V3_EXT_METHOD *method, void *val)
+{
+    return OPENSSL_strdup("NULL");
+}
+
+static void *s2i_GROUP_AC(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx, const char *str)
+{
+    return ASN1_NULL_new();
+}
+
+/*
+ * The groupAC X.509v3 extension is defined in ITU Recommendation X.509
+ * (2019), Section 17.1.2.6. See: https://www.itu.int/rec/T-REC-X.509-201910-I/en.
+ */
+const X509V3_EXT_METHOD ossl_v3_group_ac = {
+    NID_group_ac, 0, ASN1_ITEM_ref(ASN1_NULL),
+    0, 0, 0, 0,
+    (X509V3_EXT_I2S)i2s_GROUP_AC,
+    (X509V3_EXT_S2I)s2i_GROUP_AC,
+    0, 0,
+    (X509V3_EXT_I2R)i2r_GROUP_AC,
+    (X509V3_EXT_R2I)r2i_GROUP_AC,
+    NULL
+};