1 /*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <stdio.h>
11 #include "internal/cryptlib.h"
12 #include <openssl/asn1.h>
13 #include <openssl/asn1t.h>
14 #include "crypto/asn1.h"
15
ASN1_TYPE_set_octetstring(ASN1_TYPE * a,unsigned char * data,int len)16 int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len)
17 {
18 ASN1_STRING *os;
19
20 if ((os = ASN1_OCTET_STRING_new()) == NULL)
21 return 0;
22 if (!ASN1_OCTET_STRING_set(os, data, len)) {
23 ASN1_OCTET_STRING_free(os);
24 return 0;
25 }
26 ASN1_TYPE_set(a, V_ASN1_OCTET_STRING, os);
27 return 1;
28 }
29
30 /* int max_len: for returned value
31 * if passing NULL in data, nothing is copied but the necessary length
32 * for it is returned.
33 */
ASN1_TYPE_get_octetstring(const ASN1_TYPE * a,unsigned char * data,int max_len)34 int ASN1_TYPE_get_octetstring(const ASN1_TYPE *a, unsigned char *data, int max_len)
35 {
36 int ret, num;
37 const unsigned char *p;
38
39 if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL)) {
40 ERR_raise(ERR_LIB_ASN1, ASN1_R_DATA_IS_WRONG);
41 return -1;
42 }
43 p = ASN1_STRING_get0_data(a->value.octet_string);
44 ret = ASN1_STRING_length(a->value.octet_string);
45 if (ret < max_len)
46 num = ret;
47 else
48 num = max_len;
49 if (num > 0 && data != NULL)
50 memcpy(data, p, num);
51 return ret;
52 }
53
asn1_type_init_oct(ASN1_OCTET_STRING * oct,unsigned char * data,int len)54 static ossl_inline void asn1_type_init_oct(ASN1_OCTET_STRING *oct,
55 unsigned char *data, int len)
56 {
57 oct->data = data;
58 oct->type = V_ASN1_OCTET_STRING;
59 oct->length = len;
60 oct->flags = 0;
61 }
62
asn1_type_get_int_oct(ASN1_OCTET_STRING * oct,int32_t anum,long * num,unsigned char * data,int max_len)63 static int asn1_type_get_int_oct(ASN1_OCTET_STRING *oct, int32_t anum,
64 long *num, unsigned char *data, int max_len)
65 {
66 int ret = ASN1_STRING_length(oct), n;
67
68 if (num != NULL)
69 *num = anum;
70
71 if (max_len > ret)
72 n = ret;
73 else
74 n = max_len;
75
76 if (data != NULL)
77 memcpy(data, ASN1_STRING_get0_data(oct), n);
78
79 return ret;
80 }
81
82 typedef struct {
83 int32_t num;
84 ASN1_OCTET_STRING *oct;
85 } asn1_int_oct;
86
87 ASN1_SEQUENCE(asn1_int_oct) = {
88 ASN1_EMBED(asn1_int_oct, num, INT32),
89 ASN1_SIMPLE(asn1_int_oct, oct, ASN1_OCTET_STRING)
90 } static_ASN1_SEQUENCE_END(asn1_int_oct)
91
92 DECLARE_ASN1_ITEM(asn1_int_oct)
93
94 int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,
95 int len)
96 {
97 asn1_int_oct atmp;
98 ASN1_OCTET_STRING oct;
99
100 atmp.num = num;
101 atmp.oct = &oct;
102 asn1_type_init_oct(&oct, data, len);
103
104 if (ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(asn1_int_oct), &atmp, &a))
105 return 1;
106 return 0;
107 }
108
ASN1_TYPE_get_int_octetstring(const ASN1_TYPE * a,long * num,unsigned char * data,int max_len)109 int ASN1_TYPE_get_int_octetstring(const ASN1_TYPE *a, long *num,
110 unsigned char *data, int max_len)
111 {
112 asn1_int_oct *atmp = NULL;
113 int ret = -1;
114
115 if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) {
116 goto err;
117 }
118
119 atmp = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(asn1_int_oct), a);
120
121 if (atmp == NULL)
122 goto err;
123
124 ret = asn1_type_get_int_oct(atmp->oct, atmp->num, num, data, max_len);
125
126 if (ret == -1) {
127 err:
128 ERR_raise(ERR_LIB_ASN1, ASN1_R_DATA_IS_WRONG);
129 }
130 M_ASN1_free_of(atmp, asn1_int_oct);
131 return ret;
132 }
133
134 typedef struct {
135 ASN1_OCTET_STRING *oct;
136 int32_t num;
137 } asn1_oct_int;
138
139 /*
140 * Defined in RFC 5084 -
141 * Section 2. "Content-Authenticated Encryption Algorithms"
142 */
143 ASN1_SEQUENCE(asn1_oct_int) = {
144 ASN1_SIMPLE(asn1_oct_int, oct, ASN1_OCTET_STRING),
145 ASN1_EMBED(asn1_oct_int, num, INT32)
146 } static_ASN1_SEQUENCE_END(asn1_oct_int)
147
148 DECLARE_ASN1_ITEM(asn1_oct_int)
149
150 int ossl_asn1_type_set_octetstring_int(ASN1_TYPE *a, long num,
151 unsigned char *data, int len)
152 {
153 asn1_oct_int atmp;
154 ASN1_OCTET_STRING oct;
155
156 atmp.num = num;
157 atmp.oct = &oct;
158 asn1_type_init_oct(&oct, data, len);
159
160 if (ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(asn1_oct_int), &atmp, &a))
161 return 1;
162 return 0;
163 }
164
ossl_asn1_type_get_octetstring_int(const ASN1_TYPE * a,long * num,unsigned char * data,int max_len)165 int ossl_asn1_type_get_octetstring_int(const ASN1_TYPE *a, long *num,
166 unsigned char *data, int max_len)
167 {
168 asn1_oct_int *atmp = NULL;
169 int ret = -1;
170
171 if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL))
172 goto err;
173
174 atmp = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(asn1_oct_int), a);
175
176 if (atmp == NULL)
177 goto err;
178
179 ret = asn1_type_get_int_oct(atmp->oct, atmp->num, num, data, max_len);
180
181 if (ret == -1) {
182 err:
183 ERR_raise(ERR_LIB_ASN1, ASN1_R_DATA_IS_WRONG);
184 }
185 M_ASN1_free_of(atmp, asn1_oct_int);
186 return ret;
187 }
188