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
16int 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 */
34int 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
54static 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
63static 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
82typedef struct {
83    int32_t num;
84    ASN1_OCTET_STRING *oct;
85} asn1_int_oct;
86
87ASN1_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
92DECLARE_ASN1_ITEM(asn1_int_oct)
93
94int 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
109int 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
134typedef 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 */
143ASN1_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
148DECLARE_ASN1_ITEM(asn1_oct_int)
149
150int 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
165int 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