/src/openssl/crypto/x509/x509_v3.c

Source
/*
 * Copyright 1995-2026 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/safestack.h>
#include <openssl/asn1.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "x509_local.h"

#include <crypto/asn1.h>

int X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x)
{
    int ret;

    if (x == NULL)
        return 0;
    ret = sk_X509_EXTENSION_num(x);
    return ret > 0 ? ret : 0;
}

int X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x, int nid,
    int lastpos)
{
    ASN1_OBJECT *obj;

    obj = OBJ_nid2obj(nid);
    if (obj == NULL)
        return -2;
    return X509v3_get_ext_by_OBJ(x, obj, lastpos);
}

int X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *sk,
    const ASN1_OBJECT *obj, int lastpos)
{
    int n;
    X509_EXTENSION *ex;

    if (sk == NULL)
        return -1;
    lastpos++;
    if (lastpos < 0)
        lastpos = 0;
    n = sk_X509_EXTENSION_num(sk);
    for (; lastpos < n; lastpos++) {
        ex = sk_X509_EXTENSION_value(sk, lastpos);
        if (OBJ_cmp(ex->object, obj) == 0)
            return lastpos;
    }
    return -1;
}

int X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *sk, int crit,
    int lastpos)
{
    int n, c;
    X509_EXTENSION *ex;

    if (sk == NULL)
        return -1;
    lastpos++;
    if (lastpos < 0)
        lastpos = 0;
    n = sk_X509_EXTENSION_num(sk);
    for (; lastpos < n; lastpos++) {
        ex = sk_X509_EXTENSION_value(sk, lastpos);
        c = X509_EXTENSION_get_critical(ex);
        crit = crit != 0;
        if (c == crit)
            return lastpos;
    }
    return -1;
}

const X509_EXTENSION *X509v3_get_ext(const STACK_OF(X509_EXTENSION) *x, int loc)
{
    if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)
        return NULL;
    else
        return sk_X509_EXTENSION_value(x, loc);
}

X509_EXTENSION *X509v3_delete_ext(STACK_OF(X509_EXTENSION) *x, int loc)
{
    return sk_X509_EXTENSION_delete(x, loc);
}

X509_EXTENSION *X509v3_delete_extension(STACK_OF(X509_EXTENSION) **x, int loc)
{
    X509_EXTENSION *ext;

    if (x == NULL)
        return NULL;

    /* Set extensions to NULL when last element dropped */
    if ((ext = X509v3_delete_ext(*x, loc)) != NULL
        && sk_X509_EXTENSION_num(*x) == 0) {
        sk_X509_EXTENSION_free(*x);
        *x = NULL;
    }
    return ext;
}

STACK_OF(X509_EXTENSION) *X509v3_add_ext(STACK_OF(X509_EXTENSION) **x,
    const X509_EXTENSION *ex, int loc)
{
    X509_EXTENSION *new_ex = NULL;
    int n;
    STACK_OF(X509_EXTENSION) *sk = NULL;

    if (x == NULL) {
        ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
        goto err;
    }

    if (*x == NULL) {
        if ((sk = sk_X509_EXTENSION_new_null()) == NULL) {
            ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
            goto err;
        }
    } else
        sk = *x;

    if (ossl_ignored_x509_extension(ex, X509V3_ADD_SILENT))
        goto done;

    n = sk_X509_EXTENSION_num(sk);
    if (loc > n)
        loc = n;
    else if (loc < 0)
        loc = n;

    if ((new_ex = X509_EXTENSION_dup(ex)) == NULL) {
        ERR_raise(ERR_LIB_X509, ERR_R_ASN1_LIB);
        goto err;
    }
    if (!sk_X509_EXTENSION_insert(sk, new_ex, loc)) {
        ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
        goto err;
    }
done:
    if (*x == NULL)
        *x = sk;
    return sk;
err:
    X509_EXTENSION_free(new_ex);
    if (x != NULL && *x == NULL)
        sk_X509_EXTENSION_free(sk);
    return NULL;
}

/* This returns NULL also in non-error case *target == NULL && sk_X509_EXTENSION_num(exts) <= 0 */
STACK_OF(X509_EXTENSION) *X509v3_add_extensions(STACK_OF(X509_EXTENSION) **target,
    const STACK_OF(X509_EXTENSION) *exts)
{
    int i;

    if (target == NULL) {
        ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
        return NULL;
    }

    for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
        const X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
        const ASN1_OBJECT *obj = X509_EXTENSION_get_object(ext);
        int idx = X509v3_get_ext_by_OBJ(*target, obj, -1);

        /* Does extension exist in target? */
        if (idx != -1) {
            /* Delete all extensions of same type */
            do {
                X509_EXTENSION_free(sk_X509_EXTENSION_delete(*target, idx));
                idx = X509v3_get_ext_by_OBJ(*target, obj, -1);
            } while (idx != -1);
        }
        if (!X509v3_add_ext(target, ext, -1))
            return NULL;
    }
    return *target;
}

X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid,
    int crit,
    ASN1_OCTET_STRING *data)
{
    ASN1_OBJECT *obj;
    X509_EXTENSION *ret;

    obj = OBJ_nid2obj(nid);
    if (obj == NULL) {
        ERR_raise(ERR_LIB_X509, X509_R_UNKNOWN_NID);
        return NULL;
    }
    ret = X509_EXTENSION_create_by_OBJ(ex, obj, crit, data);
    if (ret == NULL)
        ASN1_OBJECT_free(obj);
    return ret;
}

X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
    const ASN1_OBJECT *obj, int crit,
    ASN1_OCTET_STRING *data)
{
    X509_EXTENSION *ret;

    if ((ex == NULL) || (*ex == NULL)) {
        if ((ret = X509_EXTENSION_new()) == NULL) {
            ERR_raise(ERR_LIB_X509, ERR_R_ASN1_LIB);
            return NULL;
        }
    } else
        ret = *ex;

    if (!X509_EXTENSION_set_object(ret, obj))
        goto err;
    if (!X509_EXTENSION_set_critical(ret, crit))
        goto err;
    if (!X509_EXTENSION_set_data(ret, data))
        goto err;

    if ((ex != NULL) && (*ex == NULL))
        *ex = ret;
    return ret;
err:
    if ((ex == NULL) || (ret != *ex))
        X509_EXTENSION_free(ret);
    return NULL;
}

int X509_EXTENSION_set_object(X509_EXTENSION *ex, const ASN1_OBJECT *obj)
{
    if ((ex == NULL) || (obj == NULL))
        return 0;
    ASN1_OBJECT_free(ex->object);
    ex->object = OBJ_dup(obj);
    return ex->object != NULL;
}

int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)
{
    if (ex == NULL)
        return 0;
    ex->critical = (crit) ? 0xFF : 0;
    return 1;
}

int X509_EXTENSION_set_data(X509_EXTENSION *ex, const ASN1_OCTET_STRING *data)
{
    int i;

    if (ex == NULL)
        return 0;
    i = ASN1_OCTET_STRING_set(&ex->value, data->data, data->length);
    if (!i)
        return 0;
    return 1;
}

const ASN1_OBJECT *X509_EXTENSION_get_object(const X509_EXTENSION *ex)
{
    if (ex == NULL)
        return NULL;
    return ex->object;
}

const ASN1_OCTET_STRING *X509_EXTENSION_get_data(const X509_EXTENSION *ex)
{
    if (ex == NULL)
        return NULL;
    return &ex->value;
}

int X509_EXTENSION_get_critical(const X509_EXTENSION *ex)
{
    if (ex == NULL)
        return 0;
    if (ex->critical > 0)
        return 1;
    return 0;
}

Coverage Report

Created: 2026-04-08 06:20

Line	Count	Source
1		/*
2		* Copyright 1995-2026 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 "x509_local.h"
19
20		#include <crypto/asn1.h>
21
22		int X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x)
23	0	{
24	0	int ret;
25
26	0	if (x == NULL)
27	0	return 0;
28	0	ret = sk_X509_EXTENSION_num(x);
29	0	return ret > 0 ? ret : 0;
30	0	}
31
32		int X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x, int nid,
33		int lastpos)
34	0	{
35	0	ASN1_OBJECT *obj;
36
37	0	obj = OBJ_nid2obj(nid);
38	0	if (obj == NULL)
39	0	return -2;
40	0	return X509v3_get_ext_by_OBJ(x, obj, lastpos);
41	0	}
42
43		int X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *sk,
44		const ASN1_OBJECT *obj, int lastpos)
45	0	{
46	0	int n;
47	0	X509_EXTENSION *ex;
48
49	0	if (sk == NULL)
50	0	return -1;
51	0	lastpos++;
52	0	if (lastpos < 0)
53	0	lastpos = 0;
54	0	n = sk_X509_EXTENSION_num(sk);
55	0	for (; lastpos < n; lastpos++) {
56	0	ex = sk_X509_EXTENSION_value(sk, lastpos);
57	0	if (OBJ_cmp(ex->object, obj) == 0)
58	0	return lastpos;
59	0	}
60	0	return -1;
61	0	}
62
63		int X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *sk, int crit,
64		int lastpos)
65	0	{
66	0	int n, c;
67	0	X509_EXTENSION *ex;
68
69	0	if (sk == NULL)
70	0	return -1;
71	0	lastpos++;
72	0	if (lastpos < 0)
73	0	lastpos = 0;
74	0	n = sk_X509_EXTENSION_num(sk);
75	0	for (; lastpos < n; lastpos++) {
76	0	ex = sk_X509_EXTENSION_value(sk, lastpos);
77	0	c = X509_EXTENSION_get_critical(ex);
78	0	crit = crit != 0;
79	0	if (c == crit)
80	0	return lastpos;
81	0	}
82	0	return -1;
83	0	}
84
85		const X509_EXTENSION X509v3_get_ext(const STACK_OF(X509_EXTENSION) x, int loc)
86	0	{
87	0	if (x == NULL \|\| sk_X509_EXTENSION_num(x) <= loc \|\| loc < 0)
88	0	return NULL;
89	0	else
90	0	return sk_X509_EXTENSION_value(x, loc);
91	0	}
92
93		X509_EXTENSION X509v3_delete_ext(STACK_OF(X509_EXTENSION) x, int loc)
94	0	{
95	0	return sk_X509_EXTENSION_delete(x, loc);
96	0	}
97
98		X509_EXTENSION X509v3_delete_extension(STACK_OF(X509_EXTENSION) *x, int loc)
99	0	{
100	0	X509_EXTENSION *ext;
101
102	0	if (x == NULL)
103	0	return NULL;
104
105		/* Set extensions to NULL when last element dropped */
106	0	if ((ext = X509v3_delete_ext(*x, loc)) != NULL
107	0	&& sk_X509_EXTENSION_num(*x) == 0) {
108	0	sk_X509_EXTENSION_free(*x);
109	0	*x = NULL;
110	0	}
111	0	return ext;
112	0	}
113
114		STACK_OF(X509_EXTENSION) X509v3_add_ext(STACK_OF(X509_EXTENSION) *x,
115		const X509_EXTENSION *ex, int loc)
116	0	{
117	0	X509_EXTENSION *new_ex = NULL;
118	0	int n;
119	0	STACK_OF(X509_EXTENSION) *sk = NULL;
120
121	0	if (x == NULL) {
122	0	ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
123	0	goto err;
124	0	}
125
126	0	if (*x == NULL) {
127	0	if ((sk = sk_X509_EXTENSION_new_null()) == NULL) {
128	0	ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
129	0	goto err;
130	0	}
131	0	} else
132	0	sk = *x;
133
134	0	if (ossl_ignored_x509_extension(ex, X509V3_ADD_SILENT))
135	0	goto done;
136
137	0	n = sk_X509_EXTENSION_num(sk);
138	0	if (loc > n)
139	0	loc = n;
140	0	else if (loc < 0)
141	0	loc = n;
142
143	0	if ((new_ex = X509_EXTENSION_dup(ex)) == NULL) {
144	0	ERR_raise(ERR_LIB_X509, ERR_R_ASN1_LIB);
145	0	goto err;
146	0	}
147	0	if (!sk_X509_EXTENSION_insert(sk, new_ex, loc)) {
148	0	ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
149	0	goto err;
150	0	}
151	0	done:
152	0	if (*x == NULL)
153	0	*x = sk;
154	0	return sk;
155	0	err:
156	0	X509_EXTENSION_free(new_ex);
157	0	if (x != NULL && *x == NULL)
158	0	sk_X509_EXTENSION_free(sk);
159	0	return NULL;
160	0	}
161
162		/* This returns NULL also in non-error case target == NULL && sk_X509_EXTENSION_num(exts) <= 0 /
163		STACK_OF(X509_EXTENSION) X509v3_add_extensions(STACK_OF(X509_EXTENSION) *target,
164		const STACK_OF(X509_EXTENSION) *exts)
165	0	{
166	0	int i;
167
168	0	if (target == NULL) {
169	0	ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
170	0	return NULL;
171	0	}
172
173	0	for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
174	0	const X509_EXTENSION *ext = sk_X509_EXTENSION_value(exts, i);
175	0	const ASN1_OBJECT *obj = X509_EXTENSION_get_object(ext);
176	0	int idx = X509v3_get_ext_by_OBJ(*target, obj, -1);
177
178		/* Does extension exist in target? */
179	0	if (idx != -1) {
180		/* Delete all extensions of same type */
181	0	do {
182	0	X509_EXTENSION_free(sk_X509_EXTENSION_delete(*target, idx));
183	0	idx = X509v3_get_ext_by_OBJ(*target, obj, -1);
184	0	} while (idx != -1);
185	0	}
186	0	if (!X509v3_add_ext(target, ext, -1))
187	0	return NULL;
188	0	}
189	0	return *target;
190	0	}
191
192		X509_EXTENSION X509_EXTENSION_create_by_NID(X509_EXTENSION *ex, int nid,
193		int crit,
194		ASN1_OCTET_STRING *data)
195	0	{
196	0	ASN1_OBJECT *obj;
197	0	X509_EXTENSION *ret;
198
199	0	obj = OBJ_nid2obj(nid);
200	0	if (obj == NULL) {
201	0	ERR_raise(ERR_LIB_X509, X509_R_UNKNOWN_NID);
202	0	return NULL;
203	0	}
204	0	ret = X509_EXTENSION_create_by_OBJ(ex, obj, crit, data);
205	0	if (ret == NULL)
206	0	ASN1_OBJECT_free(obj);
207	0	return ret;
208	0	}
209
210		X509_EXTENSION X509_EXTENSION_create_by_OBJ(X509_EXTENSION *ex,
211		const ASN1_OBJECT *obj, int crit,
212		ASN1_OCTET_STRING *data)
213	0	{
214	0	X509_EXTENSION *ret;
215
216	0	if ((ex == NULL) \|\| (*ex == NULL)) {
217	0	if ((ret = X509_EXTENSION_new()) == NULL) {
218	0	ERR_raise(ERR_LIB_X509, ERR_R_ASN1_LIB);
219	0	return NULL;
220	0	}
221	0	} else
222	0	ret = *ex;
223
224	0	if (!X509_EXTENSION_set_object(ret, obj))
225	0	goto err;
226	0	if (!X509_EXTENSION_set_critical(ret, crit))
227	0	goto err;
228	0	if (!X509_EXTENSION_set_data(ret, data))
229	0	goto err;
230
231	0	if ((ex != NULL) && (*ex == NULL))
232	0	*ex = ret;
233	0	return ret;
234	0	err:
235	0	if ((ex == NULL) \|\| (ret != *ex))
236	0	X509_EXTENSION_free(ret);
237	0	return NULL;
238	0	}
239
240		int X509_EXTENSION_set_object(X509_EXTENSION ex, const ASN1_OBJECT obj)
241	0	{
242	0	if ((ex == NULL) \|\| (obj == NULL))
243	0	return 0;
244	0	ASN1_OBJECT_free(ex->object);
245	0	ex->object = OBJ_dup(obj);
246	0	return ex->object != NULL;
247	0	}
248
249		int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)
250	0	{
251	0	if (ex == NULL)
252	0	return 0;
253	0	ex->critical = (crit) ? 0xFF : 0;
254	0	return 1;
255	0	}
256
257		int X509_EXTENSION_set_data(X509_EXTENSION ex, const ASN1_OCTET_STRING data)
258	0	{
259	0	int i;
260
261	0	if (ex == NULL)
262	0	return 0;
263	0	i = ASN1_OCTET_STRING_set(&ex->value, data->data, data->length);
264	0	if (!i)
265	0	return 0;
266	0	return 1;
267	0	}
268
269		const ASN1_OBJECT X509_EXTENSION_get_object(const X509_EXTENSION ex)
270	0	{
271	0	if (ex == NULL)
272	0	return NULL;
273	0	return ex->object;
274	0	}
275
276		const ASN1_OCTET_STRING X509_EXTENSION_get_data(const X509_EXTENSION ex)
277	0	{
278	0	if (ex == NULL)
279	0	return NULL;
280	0	return &ex->value;
281	0	}
282
283		int X509_EXTENSION_get_critical(const X509_EXTENSION *ex)
284	0	{
285	0	if (ex == NULL)
286	0	return 0;
287	0	if (ex->critical > 0)
288	0	return 1;
289	0	return 0;
290	0	}