From 9a990e8c4eb92dd64e0ec483599820e45c35ac23 Mon Sep 17 00:00:00 2001
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From: Jouni Malinen <j@w1.fi>
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Date: Sat, 13 Mar 2021 23:14:23 +0200
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Subject: [PATCH] ASN.1: Add helper functions for recognizing tag values
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Signed-off-by: Jouni Malinen <j@w1.fi>
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[geomatsi@gmail.com: backport asn1_is_null() from upstream 9a990e8c4eb9]
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Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
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[yann.morin.1998@free.fr:
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- reformat, keep the upstream sha1 and title,
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- drop numbering
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]
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Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
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---
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src/tls/asn1.h | 102 +++++++++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 102 insertions(+)
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diff --git a/src/tls/asn1.h b/src/tls/asn1.h
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index de3430adb..a4d1be473 100644
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--- a/src/tls/asn1.h
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+++ b/src/tls/asn1.h
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@@ -66,6 +66,12 @@ struct wpabuf * asn1_build_alg_id(const struct asn1_oid *oid,
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unsigned long asn1_bit_string_to_long(const u8 *buf, size_t len);
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int asn1_oid_equal(const struct asn1_oid *a, const struct asn1_oid *b);
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+static inline bool asn1_is_null(const struct asn1_hdr *hdr)
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+{
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+ return hdr->class == ASN1_CLASS_UNIVERSAL &&
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+ hdr->tag == ASN1_TAG_NULL;
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+}
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+
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extern struct asn1_oid asn1_sha1_oid;
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extern struct asn1_oid asn1_sha256_oid;
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--
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2.25.1
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