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ASN.1: Add helper functions for recognizing tag values

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Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2021-03-13 23:14:23 +02:00
parent 9bf4c0539b
commit 9a990e8c4e
1 changed files with 102 additions and 0 deletions
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102
src/tls/asn1.h
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@ -85,6 +85,108 @@ struct wpabuf * asn1_build_alg_id(const struct asn1_oid *oid,
const struct wpabuf *params);
struct wpabuf * asn1_encaps(struct wpabuf *buf, u8 class, u8 tag);
static inline bool asn1_is_oid(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_OID;
}
static inline bool asn1_is_boolean(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_BOOLEAN;
}
static inline bool asn1_is_integer(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_INTEGER;
}
static inline bool asn1_is_enumerated(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_ENUMERATED;
}
static inline bool asn1_is_sequence(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_SEQUENCE;
}
static inline bool asn1_is_set(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_SET;
}
static inline bool asn1_is_octetstring(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_OCTETSTRING;
}
static inline bool asn1_is_bitstring(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_BITSTRING;
}
static inline bool asn1_is_utctime(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_UTCTIME;
}
static inline bool asn1_is_generalizedtime(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_GENERALIZEDTIME;
}
static inline bool asn1_is_string_type(const struct asn1_hdr *hdr)
{
if (hdr->class != ASN1_CLASS_UNIVERSAL || hdr->constructed)
return false;
return hdr->tag == ASN1_TAG_UTF8STRING ||
hdr->tag == ASN1_TAG_NUMERICSTRING ||
hdr->tag == ASN1_TAG_PRINTABLESTRING ||
hdr->tag == ASN1_TAG_T61STRING ||
hdr->tag == ASN1_TAG_VIDEOTEXSTRING ||
hdr->tag == ASN1_TAG_IA5STRING ||
hdr->tag == ASN1_TAG_GRAPHICSTRING ||
hdr->tag == ASN1_TAG_VISIBLESTRING ||
hdr->tag == ASN1_TAG_GENERALSTRING ||
hdr->tag == ASN1_TAG_UNIVERSALSTRING ||
hdr->tag == ASN1_TAG_CHARACTERSTRING ||
hdr->tag == ASN1_TAG_BMPSTRING;
}
static inline bool asn1_is_bmpstring(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_BMPSTRING;
}
static inline bool asn1_is_utf8string(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_UTF8STRING;
}
static inline bool asn1_is_null(const struct asn1_hdr *hdr)
{
return hdr->class == ASN1_CLASS_UNIVERSAL &&
hdr->tag == ASN1_TAG_NULL;
}
static inline bool asn1_is_cs_tag(const struct asn1_hdr *hdr, unsigned int tag)
{
return hdr->class == ASN1_CLASS_CONTEXT_SPECIFIC &&
hdr->tag == tag;
}
extern const struct asn1_oid asn1_sha1_oid;
extern const struct asn1_oid asn1_sha256_oid;
extern const struct asn1_oid asn1_ec_public_key_oid;