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/safestack.h>
13 #include <openssl/asn1.h>
14 #include <openssl/objects.h>
15 #include <openssl/evp.h>
16 #include <openssl/x509.h>
17 #include <openssl/x509v3.h>
18 #include "crypto/x509.h"
19 #include "x509_local.h"
20
X509at_get_attr_count(const STACK_OF (X509_ATTRIBUTE)* x)21 int X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)
22 {
23 return sk_X509_ATTRIBUTE_num(x);
24 }
25
X509at_get_attr_by_NID(const STACK_OF (X509_ATTRIBUTE)* x,int nid,int lastpos)26 int X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid,
27 int lastpos)
28 {
29 const ASN1_OBJECT *obj = OBJ_nid2obj(nid);
30
31 if (obj == NULL)
32 return -2;
33 return X509at_get_attr_by_OBJ(x, obj, lastpos);
34 }
35
X509at_get_attr_by_OBJ(const STACK_OF (X509_ATTRIBUTE)* sk,const ASN1_OBJECT * obj,int lastpos)36 int X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk,
37 const ASN1_OBJECT *obj, int lastpos)
38 {
39 int n;
40 X509_ATTRIBUTE *ex;
41
42 if (sk == NULL)
43 return -1;
44 lastpos++;
45 if (lastpos < 0)
46 lastpos = 0;
47 n = sk_X509_ATTRIBUTE_num(sk);
48 for (; lastpos < n; lastpos++) {
49 ex = sk_X509_ATTRIBUTE_value(sk, lastpos);
50 if (OBJ_cmp(ex->object, obj) == 0)
51 return lastpos;
52 }
53 return -1;
54 }
55
X509at_get_attr(const STACK_OF (X509_ATTRIBUTE)* x,int loc)56 X509_ATTRIBUTE *X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)
57 {
58 if (x == NULL) {
59 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
60 return NULL;
61 }
62 if (sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0) {
63 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_INVALID_ARGUMENT);
64 return NULL;
65 }
66 return sk_X509_ATTRIBUTE_value(x, loc);
67 }
68
X509at_delete_attr(STACK_OF (X509_ATTRIBUTE)* x,int loc)69 X509_ATTRIBUTE *X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)
70 {
71 if (x == NULL) {
72 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
73 return NULL;
74 }
75 if (sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0) {
76 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_INVALID_ARGUMENT);
77 return NULL;
78 }
79 return sk_X509_ATTRIBUTE_delete(x, loc);
80 }
81
STACK_OF(X509_ATTRIBUTE)82 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,
83 X509_ATTRIBUTE *attr)
84 {
85 X509_ATTRIBUTE *new_attr = NULL;
86 STACK_OF(X509_ATTRIBUTE) *sk = NULL;
87
88 if (x == NULL || attr == NULL) {
89 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
90 return NULL;
91 }
92 if (X509at_get_attr_by_OBJ(sk, attr->object, -1) != -1) {
93 ERR_raise(ERR_LIB_X509, X509_R_DUPLICATE_ATTRIBUTE);
94 return NULL;
95 }
96
97 if (*x == NULL) {
98 if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
99 goto err;
100 } else {
101 sk = *x;
102 }
103
104 if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL)
105 goto err2;
106 if (!sk_X509_ATTRIBUTE_push(sk, new_attr))
107 goto err;
108 if (*x == NULL)
109 *x = sk;
110 return sk;
111 err:
112 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
113 err2:
114 X509_ATTRIBUTE_free(new_attr);
115 if (*x == NULL)
116 sk_X509_ATTRIBUTE_free(sk);
117 return NULL;
118 }
119
STACK_OF(X509_ATTRIBUTE)120 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE)
121 **x, const ASN1_OBJECT *obj,
122 int type,
123 const unsigned char *bytes,
124 int len)
125 {
126 X509_ATTRIBUTE *attr;
127 STACK_OF(X509_ATTRIBUTE) *ret;
128
129 attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);
130 if (attr == NULL)
131 return 0;
132 ret = X509at_add1_attr(x, attr);
133 X509_ATTRIBUTE_free(attr);
134 return ret;
135 }
136
STACK_OF(X509_ATTRIBUTE)137 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE)
138 **x, int nid, int type,
139 const unsigned char *bytes,
140 int len)
141 {
142 X509_ATTRIBUTE *attr;
143 STACK_OF(X509_ATTRIBUTE) *ret;
144
145 attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);
146 if (attr == NULL)
147 return 0;
148 ret = X509at_add1_attr(x, attr);
149 X509_ATTRIBUTE_free(attr);
150 return ret;
151 }
152
STACK_OF(X509_ATTRIBUTE)153 STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE)
154 **x, const char *attrname,
155 int type,
156 const unsigned char *bytes,
157 int len)
158 {
159 X509_ATTRIBUTE *attr;
160 STACK_OF(X509_ATTRIBUTE) *ret;
161
162 attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);
163 if (attr == NULL)
164 return 0;
165 ret = X509at_add1_attr(x, attr);
166 X509_ATTRIBUTE_free(attr);
167 return ret;
168 }
169
X509at_get0_data_by_OBJ(const STACK_OF (X509_ATTRIBUTE)* x,const ASN1_OBJECT * obj,int lastpos,int type)170 void *X509at_get0_data_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *x,
171 const ASN1_OBJECT *obj, int lastpos, int type)
172 {
173 int i = X509at_get_attr_by_OBJ(x, obj, lastpos);
174 X509_ATTRIBUTE *at;
175
176 if (i == -1)
177 return NULL;
178 if (lastpos <= -2 && X509at_get_attr_by_OBJ(x, obj, i) != -1)
179 return NULL;
180 at = X509at_get_attr(x, i);
181 if (lastpos <= -3 && X509_ATTRIBUTE_count(at) != 1)
182 return NULL;
183 return X509_ATTRIBUTE_get0_data(at, 0, type, NULL);
184 }
185
STACK_OF(X509_ATTRIBUTE)186 STACK_OF(X509_ATTRIBUTE) *ossl_x509at_dup(const STACK_OF(X509_ATTRIBUTE) *x)
187 {
188 int i, n = sk_X509_ATTRIBUTE_num(x);
189 STACK_OF(X509_ATTRIBUTE) *sk = NULL;
190
191 for (i = 0; i < n; ++i) {
192 if (X509at_add1_attr(&sk, sk_X509_ATTRIBUTE_value(x, i)) == NULL) {
193 sk_X509_ATTRIBUTE_pop_free(sk, X509_ATTRIBUTE_free);
194 return NULL;
195 }
196 }
197 return sk;
198 }
199
X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE ** attr,int nid,int atrtype,const void * data,int len)200 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid,
201 int atrtype, const void *data,
202 int len)
203 {
204 ASN1_OBJECT *obj = OBJ_nid2obj(nid);
205 X509_ATTRIBUTE *ret;
206
207 if (obj == NULL) {
208 ERR_raise(ERR_LIB_X509, X509_R_UNKNOWN_NID);
209 return NULL;
210 }
211 ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len);
212 if (ret == NULL)
213 ASN1_OBJECT_free(obj);
214 return ret;
215 }
216
X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE ** attr,const ASN1_OBJECT * obj,int atrtype,const void * data,int len)217 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr,
218 const ASN1_OBJECT *obj,
219 int atrtype, const void *data,
220 int len)
221 {
222 X509_ATTRIBUTE *ret;
223
224 if (attr == NULL || *attr == NULL) {
225 if ((ret = X509_ATTRIBUTE_new()) == NULL) {
226 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
227 return NULL;
228 }
229 } else {
230 ret = *attr;
231 }
232
233 if (!X509_ATTRIBUTE_set1_object(ret, obj))
234 goto err;
235 if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len))
236 goto err;
237
238 if (attr != NULL && *attr == NULL)
239 *attr = ret;
240 return ret;
241 err:
242 if (attr == NULL || ret != *attr)
243 X509_ATTRIBUTE_free(ret);
244 return NULL;
245 }
246
X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE ** attr,const char * atrname,int type,const unsigned char * bytes,int len)247 X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr,
248 const char *atrname, int type,
249 const unsigned char *bytes,
250 int len)
251 {
252 ASN1_OBJECT *obj = OBJ_txt2obj(atrname, 0);
253 X509_ATTRIBUTE *nattr;
254
255 if (obj == NULL) {
256 ERR_raise_data(ERR_LIB_X509, X509_R_INVALID_FIELD_NAME,
257 "name=%s", atrname);
258 return NULL;
259 }
260 nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len);
261 ASN1_OBJECT_free(obj);
262 return nattr;
263 }
264
X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE * attr,const ASN1_OBJECT * obj)265 int X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)
266 {
267 if (attr == NULL || obj == NULL) {
268 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
269 return 0;
270 }
271 ASN1_OBJECT_free(attr->object);
272 attr->object = OBJ_dup(obj);
273 return attr->object != NULL;
274 }
275
X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE * attr,int attrtype,const void * data,int len)276 int X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype,
277 const void *data, int len)
278 {
279 ASN1_TYPE *ttmp = NULL;
280 ASN1_STRING *stmp = NULL;
281 int atype = 0;
282
283 if (attr == NULL) {
284 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
285 return 0;
286 }
287 if ((attrtype & MBSTRING_FLAG) != 0) {
288 stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,
289 OBJ_obj2nid(attr->object));
290 if (stmp == NULL) {
291 ERR_raise(ERR_LIB_X509, ERR_R_ASN1_LIB);
292 return 0;
293 }
294 atype = stmp->type;
295 } else if (len != -1) {
296 if ((stmp = ASN1_STRING_type_new(attrtype)) == NULL)
297 goto err;
298 if (!ASN1_STRING_set(stmp, data, len))
299 goto err;
300 atype = attrtype;
301 }
302 /*
303 * This is a bit naughty because the attribute should really have at
304 * least one value but some types use and zero length SET and require
305 * this.
306 */
307 if (attrtype == 0) {
308 ASN1_STRING_free(stmp);
309 return 1;
310 }
311 if ((ttmp = ASN1_TYPE_new()) == NULL)
312 goto err;
313 if (len == -1 && (attrtype & MBSTRING_FLAG) == 0) {
314 if (!ASN1_TYPE_set1(ttmp, attrtype, data))
315 goto err;
316 } else {
317 ASN1_TYPE_set(ttmp, atype, stmp);
318 stmp = NULL;
319 }
320 if (!sk_ASN1_TYPE_push(attr->set, ttmp))
321 goto err;
322 return 1;
323 err:
324 ERR_raise(ERR_LIB_X509, ERR_R_MALLOC_FAILURE);
325 ASN1_TYPE_free(ttmp);
326 ASN1_STRING_free(stmp);
327 return 0;
328 }
329
X509_ATTRIBUTE_count(const X509_ATTRIBUTE * attr)330 int X509_ATTRIBUTE_count(const X509_ATTRIBUTE *attr)
331 {
332 if (attr == NULL)
333 return 0;
334 return sk_ASN1_TYPE_num(attr->set);
335 }
336
X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE * attr)337 ASN1_OBJECT *X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)
338 {
339 if (attr == NULL) {
340 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
341 return NULL;
342 }
343 return attr->object;
344 }
345
X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE * attr,int idx,int atrtype,void * data)346 void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx,
347 int atrtype, void *data)
348 {
349 ASN1_TYPE *ttmp = X509_ATTRIBUTE_get0_type(attr, idx);
350
351 if (ttmp == NULL)
352 return NULL;
353 if (atrtype == V_ASN1_BOOLEAN
354 || atrtype == V_ASN1_NULL
355 || atrtype != ASN1_TYPE_get(ttmp)) {
356 ERR_raise(ERR_LIB_X509, X509_R_WRONG_TYPE);
357 return NULL;
358 }
359 return ttmp->value.ptr;
360 }
361
X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE * attr,int idx)362 ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)
363 {
364 if (attr == NULL) {
365 ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
366 return NULL;
367 }
368 return sk_ASN1_TYPE_value(attr->set, idx);
369 }
370
