1 /*
2 * pkcs15-data.c: PKCS #15 data object functions
3 *
4 * Copyright (C) 2002 Danny De Cock <daniel.decock@postbox.be>
5 *
6 * This source file was inspired by pkcs15-cert.c.
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #if HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26
27 #include <stdlib.h>
28 #include <string.h>
29 #include <stdio.h>
30 #include <sys/stat.h>
31 #ifdef HAVE_UNISTD_H
32 #include <unistd.h>
33 #endif
34
35 #include "internal.h"
36 #include "asn1.h"
37 #include "pkcs15.h"
38 #include "common/compat_strnlen.h"
39
40
41 int
sc_pkcs15_read_data_object(struct sc_pkcs15_card * p15card,const struct sc_pkcs15_data_info * info,struct sc_pkcs15_data ** data_object_out)42 sc_pkcs15_read_data_object(struct sc_pkcs15_card *p15card,
43 const struct sc_pkcs15_data_info *info,
44 struct sc_pkcs15_data **data_object_out)
45 {
46 struct sc_context *ctx = p15card->card->ctx;
47 struct sc_pkcs15_data *data_object;
48 struct sc_pkcs15_der der;
49 int r;
50
51 LOG_FUNC_CALLED(ctx);
52 if (!info || !data_object_out)
53 LOG_FUNC_RETURN(ctx, SC_ERROR_INVALID_ARGUMENTS);
54
55 if (!info->data.value) {
56 r = sc_pkcs15_read_file(p15card, &info->path, (unsigned char **) &info->data.value, (size_t *) &info->data.len);
57 LOG_TEST_RET(ctx, r, "Cannot get DATA object data");
58 }
59
60 r = sc_der_copy(&der, &info->data);
61 LOG_TEST_RET(ctx, r, "Cannot allocate memory for der value");
62
63 data_object = calloc(sizeof(struct sc_pkcs15_data), 1);
64 if (!data_object) {
65 free(der.value);
66 LOG_TEST_RET(ctx, SC_ERROR_OUT_OF_MEMORY, "Cannot allocate memory for data object");
67 }
68
69 data_object->data = der.value;
70 data_object->data_len = der.len;
71 *data_object_out = data_object;
72
73 LOG_FUNC_RETURN(ctx,SC_SUCCESS);
74 }
75
76
77 static const struct sc_asn1_entry c_asn1_data[] = {
78 { "data", SC_ASN1_PKCS15_OBJECT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
79 { NULL, 0, 0, 0, NULL, NULL }
80 };
81 static const struct sc_asn1_entry c_asn1_com_data_attr[] = {
82 { "appName", SC_ASN1_UTF8STRING, SC_ASN1_TAG_UTF8STRING, SC_ASN1_OPTIONAL, NULL, NULL },
83 { "appOID", SC_ASN1_OBJECT, SC_ASN1_TAG_OBJECT, SC_ASN1_OPTIONAL, NULL, NULL },
84 { NULL, 0, 0, 0, NULL, NULL }
85 };
86 static const struct sc_asn1_entry c_asn1_type_data_attr[] = {
87 { "path", SC_ASN1_PATH, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
88 { NULL, 0, 0, 0, NULL, NULL }
89 };
90
sc_pkcs15_decode_dodf_entry(struct sc_pkcs15_card * p15card,struct sc_pkcs15_object * obj,const u8 ** buf,size_t * buflen)91 int sc_pkcs15_decode_dodf_entry(struct sc_pkcs15_card *p15card,
92 struct sc_pkcs15_object *obj,
93 const u8 ** buf, size_t *buflen)
94 {
95 sc_context_t *ctx = p15card->card->ctx;
96 struct sc_pkcs15_data_info info;
97 struct sc_asn1_entry asn1_com_data_attr[3],
98 asn1_type_data_attr[2],
99 asn1_data[2];
100 struct sc_asn1_pkcs15_object data_obj = { obj, asn1_com_data_attr, NULL,
101 asn1_type_data_attr };
102 size_t label_len = sizeof(info.app_label) - 1;
103 int r;
104
105 memset(info.app_label, 0, sizeof(info.app_label));
106
107 sc_copy_asn1_entry(c_asn1_com_data_attr, asn1_com_data_attr);
108 sc_copy_asn1_entry(c_asn1_type_data_attr, asn1_type_data_attr);
109 sc_copy_asn1_entry(c_asn1_data, asn1_data);
110
111 sc_format_asn1_entry(asn1_com_data_attr + 0, &info.app_label, &label_len, 0);
112 sc_format_asn1_entry(asn1_com_data_attr + 1, &info.app_oid, NULL, 0);
113 sc_format_asn1_entry(asn1_type_data_attr + 0, &info.path, NULL, 0);
114 sc_format_asn1_entry(asn1_data + 0, &data_obj, NULL, 0);
115
116 /* Fill in defaults */
117 memset(&info, 0, sizeof(info));
118 sc_init_oid(&info.app_oid);
119
120 r = sc_asn1_decode(ctx, asn1_data, *buf, *buflen, buf, buflen);
121 if (r == SC_ERROR_ASN1_END_OF_CONTENTS)
122 return r;
123 LOG_TEST_RET(ctx, r, "ASN.1 decoding failed");
124
125 if (!p15card->app || !p15card->app->ddo.aid.len) {
126 if (!p15card->file_app) {
127 return SC_ERROR_INTERNAL;
128 }
129 r = sc_pkcs15_make_absolute_path(&p15card->file_app->path, &info.path);
130 if (r < 0)
131 return r;
132 }
133 else {
134 info.path.aid = p15card->app->ddo.aid;
135 }
136
137 obj->type = SC_PKCS15_TYPE_DATA_OBJECT;
138 obj->data = malloc(sizeof(info));
139 if (obj->data == NULL)
140 LOG_FUNC_RETURN(ctx, SC_ERROR_OUT_OF_MEMORY);
141 memcpy(obj->data, &info, sizeof(info));
142
143 return SC_SUCCESS;
144 }
145
sc_pkcs15_encode_dodf_entry(sc_context_t * ctx,const struct sc_pkcs15_object * obj,u8 ** buf,size_t * bufsize)146 int sc_pkcs15_encode_dodf_entry(sc_context_t *ctx,
147 const struct sc_pkcs15_object *obj,
148 u8 **buf, size_t *bufsize)
149 {
150 struct sc_asn1_entry asn1_com_data_attr[4],
151 asn1_type_data_attr[2],
152 asn1_data[2];
153 struct sc_pkcs15_data_info *info;
154 struct sc_asn1_pkcs15_object data_obj = { (struct sc_pkcs15_object *) obj,
155 asn1_com_data_attr, NULL,
156 asn1_type_data_attr };
157 size_t label_len;
158
159 info = (struct sc_pkcs15_data_info *) obj->data;
160 label_len = strnlen(info->app_label, sizeof info->app_label);
161
162 sc_copy_asn1_entry(c_asn1_com_data_attr, asn1_com_data_attr);
163 sc_copy_asn1_entry(c_asn1_type_data_attr, asn1_type_data_attr);
164 sc_copy_asn1_entry(c_asn1_data, asn1_data);
165
166 if (label_len)
167 sc_format_asn1_entry(asn1_com_data_attr + 0, &info->app_label, &label_len, 1);
168
169 if (sc_valid_oid(&info->app_oid))
170 sc_format_asn1_entry(asn1_com_data_attr + 1, &info->app_oid, NULL, 1);
171
172 sc_format_asn1_entry(asn1_type_data_attr + 0, &info->path, NULL, 1);
173 sc_format_asn1_entry(asn1_data + 0, &data_obj, NULL, 1);
174
175 return sc_asn1_encode(ctx, asn1_data, buf, bufsize);
176 }
177
sc_pkcs15_free_data_object(struct sc_pkcs15_data * data_object)178 void sc_pkcs15_free_data_object(struct sc_pkcs15_data *data_object)
179 {
180 if (data_object == NULL)
181 return;
182
183 free(data_object->data);
184 free(data_object);
185 }
186
sc_pkcs15_free_data_info(struct sc_pkcs15_data_info * info)187 void sc_pkcs15_free_data_info(struct sc_pkcs15_data_info *info)
188 {
189 if (info && info->data.value && info->data.len)
190 free(info->data.value);
191
192 free(info);
193 }
194