264 lines
5.5 KiB
C
264 lines
5.5 KiB
C
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/* $OpenBSD: asn1_types.c,v 1.1 2021/12/14 17:35:21 jsing Exp $ */
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/*
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* Copyright (c) 2021 Joel Sing <jsing@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stddef.h>
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#include <openssl/asn1.h>
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struct asn1_type {
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const char *name;
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uint32_t bit_value;
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int char_width;
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};
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/*
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* Universal class tag types - ITU X.680.
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*/
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static const struct asn1_type asn1_types[31] = {
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[0] = {
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/* Tag 0 (0x00) - Reserved for use by encoding rules */
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.name = "EOC",
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.bit_value = 0,
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.char_width = -1,
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},
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[1] = {
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/* Tag 1 (0x01) - Boolean */
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.name = "BOOLEAN",
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.bit_value = 0,
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.char_width = -1,
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},
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[2] = {
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/* Tag 2 (0x02) - Integer */
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.name = "INTEGER",
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.bit_value = 0,
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.char_width = -1,
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},
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[3] = {
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/* Tag 3 (0x03) - BitString */
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.name = "BIT STRING",
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.bit_value = B_ASN1_BIT_STRING,
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.char_width = -1,
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},
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[4] = {
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/* Tag 4 (0x04) - OctetString */
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.name = "OCTET STRING",
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.bit_value = B_ASN1_OCTET_STRING,
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.char_width = -1,
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},
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[5] = {
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/* Tag 5 (0x05) - Null */
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.name = "NULL",
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.bit_value = 0,
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.char_width = -1,
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},
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[6] = {
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/* Tag 6 (0x06) - Object Identifier */
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.name = "OBJECT",
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.bit_value = 0,
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.char_width = -1,
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},
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[7] = {
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/* Tag 7 (0x07) - Object Descriptor */
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.name = "OBJECT DESCRIPTOR",
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.bit_value = B_ASN1_UNKNOWN,
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.char_width = -1,
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},
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[8] = {
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/* Tag 8 (0x08) - External */
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.name = "EXTERNAL",
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.bit_value = B_ASN1_UNKNOWN,
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.char_width = -1,
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},
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[9] = {
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/* Tag 9 (0x09) - Real */
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.name = "REAL",
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.bit_value = B_ASN1_UNKNOWN,
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.char_width = -1,
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},
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[10] = {
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/* Tag 10 (0x0a) - Enumerated */
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.name = "ENUMERATED",
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.bit_value = B_ASN1_UNKNOWN,
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.char_width = -1,
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},
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[11] = {
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/* Tag 11 (0x0b) - Embedded PDV */
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.name = "<ASN1 11 EMBEDDED PDV>",
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.bit_value = B_ASN1_UNKNOWN,
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.char_width = -1,
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},
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[12] = {
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/* Tag 12 (0x0c) - UTF8String */
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.name = "UTF8STRING",
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.bit_value = B_ASN1_UTF8STRING,
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.char_width = 0,
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},
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[13] = {
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/* Tag 13 (0x0d) - Relative Object Identifier */
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.name = "<ASN1 13 RELATIVE OID>",
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.bit_value = B_ASN1_UNKNOWN,
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.char_width = -1,
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},
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[14] = {
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/* Tag 14 (0x0e) - Time */
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.name = "<ASN1 14 TIME>",
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.bit_value = B_ASN1_UNKNOWN,
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.char_width = -1,
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},
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[15] = {
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/* Tag 15 (0x0f) - Reserved */
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.name = "<ASN1 15 RESERVED>",
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.bit_value = B_ASN1_UNKNOWN,
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.char_width = -1,
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},
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[16] = {
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/* Tag 16 (0x10)- Sequence */
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.name = "SEQUENCE",
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.bit_value = B_ASN1_SEQUENCE,
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.char_width = -1,
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},
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[17] = {
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/* Tag 17 (0x11) - Set */
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.name = "SET",
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.bit_value = 0,
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.char_width = -1,
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},
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[18] = {
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/* Tag 18 (0x12) - NumericString */
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.name = "NUMERICSTRING",
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.bit_value = B_ASN1_NUMERICSTRING,
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.char_width = -1,
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},
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[19] = {
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/* Tag 19 (0x13) - PrintableString */
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.name = "PRINTABLESTRING",
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.bit_value = B_ASN1_PRINTABLESTRING,
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.char_width = 1,
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},
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[20] = {
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/* Tag 20 (0x14) - TeletexString (T61String) */
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.name = "T61STRING",
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.bit_value = B_ASN1_T61STRING,
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.char_width = 1,
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},
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[21] = {
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/* Tag 21 (0x15) - VideotexString */
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.name = "VIDEOTEXSTRING",
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.bit_value = B_ASN1_VIDEOTEXSTRING,
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.char_width = -1,
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},
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[22] = {
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/* Tag 22 (0x16) - IA5String */
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.name = "IA5STRING",
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.bit_value = B_ASN1_IA5STRING,
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.char_width = 1,
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},
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[23] = {
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/* Tag 23 (0x17) - UTCTime */
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.name = "UTCTIME",
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.bit_value = B_ASN1_UTCTIME,
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.char_width = 1,
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},
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[24] = {
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/* Tag 24 (0x18) - GeneralizedTime */
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.name = "GENERALIZEDTIME",
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.bit_value = B_ASN1_GENERALIZEDTIME,
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.char_width = 1,
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},
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[25] = {
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/* Tag 25 (0x19) - GraphicString */
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.name = "GRAPHICSTRING",
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.bit_value = B_ASN1_GRAPHICSTRING,
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.char_width = -1,
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},
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[26] = {
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/* Tag 26 (0x1a) - VisibleString (ISO646String) */
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.name = "VISIBLESTRING",
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.bit_value = B_ASN1_ISO64STRING,
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.char_width = 1,
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},
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[27] = {
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/* Tag 27 (0x1b) - GeneralString */
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.name = "GENERALSTRING",
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.bit_value = B_ASN1_GENERALSTRING,
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.char_width = -1,
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},
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[28] = {
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/* Tag 28 (0x1c) - UniversalString */
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.name = "UNIVERSALSTRING",
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.bit_value = B_ASN1_UNIVERSALSTRING,
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.char_width = 4,
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},
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[29] = {
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/* Tag 29 (0x1d) - Unallocated */
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.name = "<ASN1 29>",
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.bit_value = B_ASN1_UNKNOWN,
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.char_width = -1,
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},
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[30] = {
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/* Tag 30 (0x1e) - BMPString */
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.name = "BMPSTRING",
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.bit_value = B_ASN1_BMPSTRING,
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.char_width = 2,
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},
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};
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static const struct asn1_type *
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asn1_type_by_tag(int tag)
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{
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if (tag < 0 || tag > 30)
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return NULL;
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return &asn1_types[tag];
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}
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int
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asn1_tag2charwidth(int tag)
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{
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const struct asn1_type *at;
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if ((at = asn1_type_by_tag(tag)) != NULL)
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return at->char_width;
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return -1;
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}
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unsigned long
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ASN1_tag2bit(int tag)
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{
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const struct asn1_type *at;
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if ((at = asn1_type_by_tag(tag)) != NULL)
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return (unsigned long)at->bit_value;
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return 0;
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}
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const char *
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ASN1_tag2str(int tag)
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{
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const struct asn1_type *at;
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if (tag == V_ASN1_NEG_INTEGER || tag == V_ASN1_NEG_ENUMERATED)
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tag &= ~V_ASN1_NEG;
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if ((at = asn1_type_by_tag(tag)) != NULL)
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return at->name;
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return "(unknown)";
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}
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