mbed TLS v2.23.0

asn1.h
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1
6 /*
7 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
8 * SPDX-License-Identifier: Apache-2.0
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License"); you may
11 * not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
18 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 *
22 * This file is part of mbed TLS (https://tls.mbed.org)
23 */
24 #ifndef MBEDTLS_ASN1_H
25 #define MBEDTLS_ASN1_H
26
27 #if !defined(MBEDTLS_CONFIG_FILE)
28 #include "mbedtls/config.h"
29 #else
30 #include MBEDTLS_CONFIG_FILE
31 #endif
32
33 #include <stddef.h>
34
35 #if defined(MBEDTLS_BIGNUM_C)
36 #include "mbedtls/bignum.h"
37 #endif
38
51 #define MBEDTLS_ERR_ASN1_OUT_OF_DATA -0x0060
52 #define MBEDTLS_ERR_ASN1_UNEXPECTED_TAG -0x0062
53 #define MBEDTLS_ERR_ASN1_INVALID_LENGTH -0x0064
54 #define MBEDTLS_ERR_ASN1_LENGTH_MISMATCH -0x0066
55 #define MBEDTLS_ERR_ASN1_INVALID_DATA -0x0068
56 #define MBEDTLS_ERR_ASN1_ALLOC_FAILED -0x006A
57 #define MBEDTLS_ERR_ASN1_BUF_TOO_SMALL -0x006C
59 /* \} name */
60
72 #define MBEDTLS_ASN1_BOOLEAN 0x01
73 #define MBEDTLS_ASN1_INTEGER 0x02
74 #define MBEDTLS_ASN1_BIT_STRING 0x03
75 #define MBEDTLS_ASN1_OCTET_STRING 0x04
76 #define MBEDTLS_ASN1_NULL 0x05
77 #define MBEDTLS_ASN1_OID 0x06
78 #define MBEDTLS_ASN1_ENUMERATED 0x0A
79 #define MBEDTLS_ASN1_UTF8_STRING 0x0C
80 #define MBEDTLS_ASN1_SEQUENCE 0x10
81 #define MBEDTLS_ASN1_SET 0x11
82 #define MBEDTLS_ASN1_PRINTABLE_STRING 0x13
83 #define MBEDTLS_ASN1_T61_STRING 0x14
84 #define MBEDTLS_ASN1_IA5_STRING 0x16
85 #define MBEDTLS_ASN1_UTC_TIME 0x17
86 #define MBEDTLS_ASN1_GENERALIZED_TIME 0x18
87 #define MBEDTLS_ASN1_UNIVERSAL_STRING 0x1C
88 #define MBEDTLS_ASN1_BMP_STRING 0x1E
89 #define MBEDTLS_ASN1_PRIMITIVE 0x00
90 #define MBEDTLS_ASN1_CONSTRUCTED 0x20
91 #define MBEDTLS_ASN1_CONTEXT_SPECIFIC 0x80
92
93 /* Slightly smaller way to check if tag is a string tag
94 * compared to canonical implementation. */
95 #define MBEDTLS_ASN1_IS_STRING_TAG( tag ) \
96 ( ( tag ) < 32u && ( \
97 ( ( 1u << ( tag ) ) & ( ( 1u << MBEDTLS_ASN1_BMP_STRING ) | \
98 ( 1u << MBEDTLS_ASN1_UTF8_STRING ) | \
99 ( 1u << MBEDTLS_ASN1_T61_STRING ) | \
100 ( 1u << MBEDTLS_ASN1_IA5_STRING ) | \
101 ( 1u << MBEDTLS_ASN1_UNIVERSAL_STRING ) | \
102 ( 1u << MBEDTLS_ASN1_PRINTABLE_STRING ) | \
103 ( 1u << MBEDTLS_ASN1_BIT_STRING ) ) ) != 0 ) )
104
105 /*
106 * Bit masks for each of the components of an ASN.1 tag as specified in
107 * ITU X.690 (08/2015), section 8.1 "General rules for encoding",
108 * paragraph 8.1.2.2:
109 *
110 * Bit 8 7 6 5 1
111 * +-------+-----+------------+
112 * | Class | P/C | Tag number |
113 * +-------+-----+------------+
114 */
115 #define MBEDTLS_ASN1_TAG_CLASS_MASK 0xC0
116 #define MBEDTLS_ASN1_TAG_PC_MASK 0x20
117 #define MBEDTLS_ASN1_TAG_VALUE_MASK 0x1F
118
119 /* \} name */
120 /* \} addtogroup asn1_module */
121
123 #define MBEDTLS_OID_SIZE(x) (sizeof(x) - 1)
124
131 #define MBEDTLS_OID_CMP(oid_str, oid_buf) \
132 ( ( MBEDTLS_OID_SIZE(oid_str) != (oid_buf)->len ) || \
133 memcmp( (oid_str), (oid_buf)->p, (oid_buf)->len) != 0 )
134
135 #define MBEDTLS_OID_CMP_RAW(oid_str, oid_buf, oid_buf_len) \
136 ( ( MBEDTLS_OID_SIZE(oid_str) != (oid_buf_len) ) || \
137 memcmp( (oid_str), (oid_buf), (oid_buf_len) ) != 0 )
138
139 #ifdef __cplusplus
140 extern "C" {
141 #endif
142
151 typedef struct mbedtls_asn1_buf
152 {
153 int tag;
154 size_t len;
155 unsigned char *p;
156 }
157 mbedtls_asn1_buf;
158
162 typedef struct mbedtls_asn1_bitstring
163 {
164 size_t len;
165 unsigned char unused_bits;
166 unsigned char *p;
167 }
168 mbedtls_asn1_bitstring;
169
173 typedef struct mbedtls_asn1_sequence
174 {
175 mbedtls_asn1_buf buf;
176 struct mbedtls_asn1_sequence *next;
177 }
178 mbedtls_asn1_sequence;
179
183 typedef struct mbedtls_asn1_named_data
184 {
185 mbedtls_asn1_buf oid;
186 mbedtls_asn1_buf val;
187 struct mbedtls_asn1_named_data *next;
188 unsigned char next_merged;
189 }
190 mbedtls_asn1_named_data;
191
210 int mbedtls_asn1_get_len( unsigned char **p,
211 const unsigned char *end,
212 size_t *len );
213
235 int mbedtls_asn1_get_tag( unsigned char **p,
236 const unsigned char *end,
237 size_t *len, int tag );
238
254 int mbedtls_asn1_get_bool( unsigned char **p,
255 const unsigned char *end,
256 int *val );
257
275 int mbedtls_asn1_get_int( unsigned char **p,
276 const unsigned char *end,
277 int *val );
278
296 int mbedtls_asn1_get_enum( unsigned char **p,
297 const unsigned char *end,
298 int *val );
299
317 int mbedtls_asn1_get_bitstring( unsigned char **p, const unsigned char *end,
318 mbedtls_asn1_bitstring *bs );
319
338 int mbedtls_asn1_get_bitstring_null( unsigned char **p,
339 const unsigned char *end,
340 size_t *len );
341
389 int mbedtls_asn1_get_sequence_of( unsigned char **p,
390 const unsigned char *end,
391 mbedtls_asn1_sequence *cur,
392 int tag );
414 void mbedtls_asn1_sequence_free( mbedtls_asn1_sequence *seq );
415
501 int mbedtls_asn1_traverse_sequence_of(
502 unsigned char **p,
503 const unsigned char *end,
504 unsigned char tag_must_mask, unsigned char tag_must_val,
505 unsigned char tag_may_mask, unsigned char tag_may_val,
506 int (*cb)( void *ctx, int tag,
507 unsigned char* start, size_t len ),
508 void *ctx );
509
510 #if defined(MBEDTLS_BIGNUM_C)
511
529 int mbedtls_asn1_get_mpi( unsigned char **p,
530 const unsigned char *end,
531 mbedtls_mpi *X );
532 #endif /* MBEDTLS_BIGNUM_C */
533
550 int mbedtls_asn1_get_alg( unsigned char **p,
551 const unsigned char *end,
552 mbedtls_asn1_buf *alg, mbedtls_asn1_buf *params );
553
569 int mbedtls_asn1_get_alg_null( unsigned char **p,
570 const unsigned char *end,
571 mbedtls_asn1_buf *alg );
572
583 mbedtls_asn1_named_data *mbedtls_asn1_find_named_data( mbedtls_asn1_named_data *list,
584 const char *oid, size_t len );
585
593 void mbedtls_asn1_free_named_data( mbedtls_asn1_named_data *entry );
594
603 void mbedtls_asn1_free_named_data_list( mbedtls_asn1_named_data **head );
604
605 #ifdef __cplusplus
606 }
607 #endif
608
609 #endif /* asn1.h */
mbedtls_asn1_get_bitstring_null
int mbedtls_asn1_get_bitstring_null(unsigned char **p, const unsigned char *end, size_t *len)
Retrieve a bitstring ASN.1 tag without unused bits and its value. Updates the pointer to the beginnin...
mbedtls_asn1_buf
struct mbedtls_asn1_buf mbedtls_asn1_buf
mbedtls_asn1_bitstring::p
unsigned char * p
Definition: asn1.h:166
mbedtls_asn1_bitstring::unused_bits
unsigned char unused_bits
Definition: asn1.h:165
mbedtls_asn1_get_int
int mbedtls_asn1_get_int(unsigned char **p, const unsigned char *end, int *val)
Retrieve an integer ASN.1 tag and its value. Updates the pointer to immediately behind the full tag.
mbedtls_mpi
MPI structure.
Definition: bignum.h:187
mbedtls_asn1_find_named_data
mbedtls_asn1_named_data * mbedtls_asn1_find_named_data(mbedtls_asn1_named_data *list, const char *oid, size_t len)
Find a specific named_data entry in a sequence or list based on the OID.
mbedtls_asn1_named_data::val
mbedtls_asn1_buf val
Definition: asn1.h:186
mbedtls_asn1_named_data
Definition: asn1.h:184
mbedtls_asn1_bitstring
struct mbedtls_asn1_bitstring mbedtls_asn1_bitstring
mbedtls_asn1_named_data::next
struct mbedtls_asn1_named_data * next
Definition: asn1.h:187
mbedtls_asn1_get_bitstring
int mbedtls_asn1_get_bitstring(unsigned char **p, const unsigned char *end, mbedtls_asn1_bitstring *bs)
Retrieve a bitstring ASN.1 tag and its value. Updates the pointer to immediately behind the full tag.
mbedtls_asn1_free_named_data
void mbedtls_asn1_free_named_data(mbedtls_asn1_named_data *entry)
Free a mbedtls_asn1_named_data entry.
mbedtls_asn1_free_named_data_list
void mbedtls_asn1_free_named_data_list(mbedtls_asn1_named_data **head)
Free all entries in a mbedtls_asn1_named_data list.
mbedtls_asn1_named_data
struct mbedtls_asn1_named_data mbedtls_asn1_named_data
mbedtls_asn1_buf::len
size_t len
Definition: asn1.h:154
mbedtls_asn1_get_len
int mbedtls_asn1_get_len(unsigned char **p, const unsigned char *end, size_t *len)
Get the length of an ASN.1 element. Updates the pointer to immediately behind the length.
mbedtls_asn1_traverse_sequence_of
int mbedtls_asn1_traverse_sequence_of(unsigned char **p, const unsigned char *end, unsigned char tag_must_mask, unsigned char tag_must_val, unsigned char tag_may_mask, unsigned char tag_may_val, int(*cb)(void *ctx, int tag, unsigned char *start, size_t len), void *ctx)
Traverse an ASN.1 SEQUENCE container and call a callback for each entry.
bignum.h
Multi-precision integer library.
mbedtls_asn1_bitstring::len
size_t len
Definition: asn1.h:164
mbedtls_asn1_sequence::buf
mbedtls_asn1_buf buf
Definition: asn1.h:175
mbedtls_asn1_sequence
Definition: asn1.h:174
mbedtls_asn1_get_tag
int mbedtls_asn1_get_tag(unsigned char **p, const unsigned char *end, size_t *len, int tag)
Get the tag and length of the element. Check for the requested tag. Updates the pointer to immediatel...
mbedtls_asn1_sequence::next
struct mbedtls_asn1_sequence * next
Definition: asn1.h:176
mbedtls_asn1_buf::p
unsigned char * p
Definition: asn1.h:155
mbedtls_asn1_get_alg_null
int mbedtls_asn1_get_alg_null(unsigned char **p, const unsigned char *end, mbedtls_asn1_buf *alg)
Retrieve an AlgorithmIdentifier ASN.1 sequence with NULL or no params. Updates the pointer to immedia...
mbedtls_asn1_get_alg
int mbedtls_asn1_get_alg(unsigned char **p, const unsigned char *end, mbedtls_asn1_buf *alg, mbedtls_asn1_buf *params)
Retrieve an AlgorithmIdentifier ASN.1 sequence. Updates the pointer to immediately behind the full Al...
mbedtls_asn1_bitstring
Definition: asn1.h:163
mbedtls_asn1_named_data::next_merged
unsigned char next_merged
Definition: asn1.h:188
mbedtls_asn1_sequence
struct mbedtls_asn1_sequence mbedtls_asn1_sequence
mbedtls_asn1_get_bool
int mbedtls_asn1_get_bool(unsigned char **p, const unsigned char *end, int *val)
Retrieve a boolean ASN.1 tag and its value. Updates the pointer to immediately behind the full tag.
mbedtls_asn1_named_data::oid
mbedtls_asn1_buf oid
Definition: asn1.h:185
mbedtls_asn1_get_mpi
int mbedtls_asn1_get_mpi(unsigned char **p, const unsigned char *end, mbedtls_mpi *X)
Retrieve an integer ASN.1 tag and its value. Updates the pointer to immediately behind the full tag.
config.h
Configuration options (set of defines)
mbedtls_asn1_buf::tag
int tag
Definition: asn1.h:153
mbedtls_asn1_get_enum
int mbedtls_asn1_get_enum(unsigned char **p, const unsigned char *end, int *val)
Retrieve an enumerated ASN.1 tag and its value. Updates the pointer to immediately behind the full ta...
mbedtls_asn1_sequence_free
void mbedtls_asn1_sequence_free(mbedtls_asn1_sequence *seq)
Free a heap-allocated linked list presentation of an ASN.1 sequence, including the first element.
mbedtls_asn1_buf
Definition: asn1.h:152
mbedtls_asn1_get_sequence_of
int mbedtls_asn1_get_sequence_of(unsigned char **p, const unsigned char *end, mbedtls_asn1_sequence *cur, int tag)
Parses and splits an ASN.1 "SEQUENCE OF <tag>". Updates the pointer to immediately behind the full se...