Coverage Report

Created: 2024-11-21 07:03

/src/openssl/crypto/x509/v3_purp.c
Line
Count
Source (jump to first uncovered line)
1
/*
2
 * Copyright 1999-2023 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 "internal/numbers.h"
13
#include <openssl/x509v3.h>
14
#include <openssl/x509_vfy.h>
15
#include "crypto/x509.h"
16
#include "internal/tsan_assist.h"
17
#include "x509_local.h"
18
19
static int check_ssl_ca(const X509 *x);
20
static int check_purpose_ssl_client(const X509_PURPOSE *xp, const X509 *x,
21
                                    int non_leaf);
22
static int check_purpose_ssl_server(const X509_PURPOSE *xp, const X509 *x,
23
                                    int non_leaf);
24
static int check_purpose_ns_ssl_server(const X509_PURPOSE *xp, const X509 *x,
25
                                       int non_leaf);
26
static int purpose_smime(const X509 *x, int non_leaf);
27
static int check_purpose_smime_sign(const X509_PURPOSE *xp, const X509 *x,
28
                                    int non_leaf);
29
static int check_purpose_smime_encrypt(const X509_PURPOSE *xp, const X509 *x,
30
                                       int non_leaf);
31
static int check_purpose_crl_sign(const X509_PURPOSE *xp, const X509 *x,
32
                                  int non_leaf);
33
static int check_purpose_timestamp_sign(const X509_PURPOSE *xp, const X509 *x,
34
                                        int non_leaf);
35
static int check_purpose_code_sign(const X509_PURPOSE *xp, const X509 *x,
36
                                        int non_leaf);
37
static int no_check_purpose(const X509_PURPOSE *xp, const X509 *x,
38
                            int non_leaf);
39
static int check_purpose_ocsp_helper(const X509_PURPOSE *xp, const X509 *x,
40
                                     int non_leaf);
41
42
static int xp_cmp(const X509_PURPOSE *const *a, const X509_PURPOSE *const *b);
43
static void xptable_free(X509_PURPOSE *p);
44
45
static X509_PURPOSE xstandard[] = {
46
    {X509_PURPOSE_SSL_CLIENT, X509_TRUST_SSL_CLIENT, 0,
47
     check_purpose_ssl_client, "SSL client", "sslclient", NULL},
48
    {X509_PURPOSE_SSL_SERVER, X509_TRUST_SSL_SERVER, 0,
49
     check_purpose_ssl_server, "SSL server", "sslserver", NULL},
50
    {X509_PURPOSE_NS_SSL_SERVER, X509_TRUST_SSL_SERVER, 0,
51
     check_purpose_ns_ssl_server, "Netscape SSL server", "nssslserver", NULL},
52
    {X509_PURPOSE_SMIME_SIGN, X509_TRUST_EMAIL, 0, check_purpose_smime_sign,
53
     "S/MIME signing", "smimesign", NULL},
54
    {X509_PURPOSE_SMIME_ENCRYPT, X509_TRUST_EMAIL, 0,
55
     check_purpose_smime_encrypt, "S/MIME encryption", "smimeencrypt", NULL},
56
    {X509_PURPOSE_CRL_SIGN, X509_TRUST_COMPAT, 0, check_purpose_crl_sign,
57
     "CRL signing", "crlsign", NULL},
58
    {X509_PURPOSE_ANY, X509_TRUST_DEFAULT, 0, no_check_purpose,
59
     "Any Purpose", "any",
60
     NULL},
61
    {X509_PURPOSE_OCSP_HELPER, X509_TRUST_COMPAT, 0, check_purpose_ocsp_helper,
62
     "OCSP helper", "ocsphelper", NULL},
63
    {X509_PURPOSE_TIMESTAMP_SIGN, X509_TRUST_TSA, 0,
64
     check_purpose_timestamp_sign, "Time Stamp signing", "timestampsign",
65
     NULL},
66
    {X509_PURPOSE_CODE_SIGN, X509_TRUST_OBJECT_SIGN, 0,
67
     check_purpose_code_sign, "Code signing", "codesign",
68
     NULL},
69
};
70
71
0
#define X509_PURPOSE_COUNT OSSL_NELEM(xstandard)
72
73
static STACK_OF(X509_PURPOSE) *xptable = NULL;
74
75
static int xp_cmp(const X509_PURPOSE *const *a, const X509_PURPOSE *const *b)
76
0
{
77
0
    return (*a)->purpose - (*b)->purpose;
78
0
}
79
80
/*
81
 * As much as I'd like to make X509_check_purpose use a "const" X509* I really
82
 * can't because it does recalculate hashes and do other non-const things.
83
 * If id == -1 it just calls x509v3_cache_extensions() for its side-effect.
84
 * Returns 1 on success, 0 if x does not allow purpose, -1 on (internal) error.
85
 */
86
int X509_check_purpose(X509 *x, int id, int non_leaf)
87
0
{
88
0
    int idx;
89
0
    const X509_PURPOSE *pt;
90
91
0
    if (!ossl_x509v3_cache_extensions(x))
92
0
        return -1;
93
0
    if (id == -1)
94
0
        return 1;
95
96
0
    idx = X509_PURPOSE_get_by_id(id);
97
0
    if (idx == -1)
98
0
        return -1;
99
0
    pt = X509_PURPOSE_get0(idx);
100
0
    return pt->check_purpose(pt, x, non_leaf);
101
0
}
102
103
int X509_PURPOSE_set(int *p, int purpose)
104
0
{
105
0
    if (X509_PURPOSE_get_by_id(purpose) == -1) {
106
0
        ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_PURPOSE);
107
0
        return 0;
108
0
    }
109
0
    *p = purpose;
110
0
    return 1;
111
0
}
112
113
int X509_PURPOSE_get_count(void)
114
0
{
115
0
    if (!xptable)
116
0
        return X509_PURPOSE_COUNT;
117
0
    return sk_X509_PURPOSE_num(xptable) + X509_PURPOSE_COUNT;
118
0
}
119
120
X509_PURPOSE *X509_PURPOSE_get0(int idx)
121
0
{
122
0
    if (idx < 0)
123
0
        return NULL;
124
0
    if (idx < (int)X509_PURPOSE_COUNT)
125
0
        return xstandard + idx;
126
0
    return sk_X509_PURPOSE_value(xptable, idx - X509_PURPOSE_COUNT);
127
0
}
128
129
int X509_PURPOSE_get_by_sname(const char *sname)
130
0
{
131
0
    int i;
132
0
    X509_PURPOSE *xptmp;
133
134
0
    for (i = 0; i < X509_PURPOSE_get_count(); i++) {
135
0
        xptmp = X509_PURPOSE_get0(i);
136
0
        if (strcmp(xptmp->sname, sname) == 0)
137
0
            return i;
138
0
    }
139
0
    return -1;
140
0
}
141
142
/* Returns -1 on error, else an index => 0 in standard/extended purpose table */
143
int X509_PURPOSE_get_by_id(int purpose)
144
0
{
145
0
    X509_PURPOSE tmp;
146
0
    int idx;
147
148
0
    if (purpose >= X509_PURPOSE_MIN && purpose <= X509_PURPOSE_MAX)
149
0
        return purpose - X509_PURPOSE_MIN;
150
0
    if (xptable == NULL)
151
0
        return -1;
152
0
    tmp.purpose = purpose;
153
0
    idx = sk_X509_PURPOSE_find(xptable, &tmp);
154
0
    if (idx < 0)
155
0
        return -1;
156
0
    return idx + X509_PURPOSE_COUNT;
157
0
}
158
159
int X509_PURPOSE_add(int id, int trust, int flags,
160
                     int (*ck) (const X509_PURPOSE *, const X509 *, int),
161
                     const char *name, const char *sname, void *arg)
162
0
{
163
0
    int idx;
164
0
    X509_PURPOSE *ptmp;
165
166
    /* This is set according to what we change: application can't set it */
167
0
    flags &= ~X509_PURPOSE_DYNAMIC;
168
    /* This will always be set for application modified trust entries */
169
0
    flags |= X509_PURPOSE_DYNAMIC_NAME;
170
    /* Get existing entry if any */
171
0
    idx = X509_PURPOSE_get_by_id(id);
172
    /* Need a new entry */
173
0
    if (idx == -1) {
174
0
        if ((ptmp = OPENSSL_malloc(sizeof(*ptmp))) == NULL)
175
0
            return 0;
176
0
        ptmp->flags = X509_PURPOSE_DYNAMIC;
177
0
    } else {
178
0
        ptmp = X509_PURPOSE_get0(idx);
179
0
    }
180
181
    /* OPENSSL_free existing name if dynamic */
182
0
    if ((ptmp->flags & X509_PURPOSE_DYNAMIC_NAME) != 0) {
183
0
        OPENSSL_free(ptmp->name);
184
0
        OPENSSL_free(ptmp->sname);
185
0
    }
186
    /* Dup supplied name */
187
0
    ptmp->name = OPENSSL_strdup(name);
188
0
    ptmp->sname = OPENSSL_strdup(sname);
189
0
    if (ptmp->name == NULL || ptmp->sname == NULL)
190
0
        goto err;
191
    /* Keep the dynamic flag of existing entry */
192
0
    ptmp->flags &= X509_PURPOSE_DYNAMIC;
193
    /* Set all other flags */
194
0
    ptmp->flags |= flags;
195
196
0
    ptmp->purpose = id;
197
0
    ptmp->trust = trust;
198
0
    ptmp->check_purpose = ck;
199
0
    ptmp->usr_data = arg;
200
201
    /* If its a new entry manage the dynamic table */
202
0
    if (idx == -1) {
203
0
        if (xptable == NULL
204
0
            && (xptable = sk_X509_PURPOSE_new(xp_cmp)) == NULL) {
205
0
            ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
206
0
            goto err;
207
0
        }
208
0
        if (!sk_X509_PURPOSE_push(xptable, ptmp)) {
209
0
            ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
210
0
            goto err;
211
0
        }
212
0
    }
213
0
    return 1;
214
0
 err:
215
0
    if (idx == -1) {
216
0
        OPENSSL_free(ptmp->name);
217
0
        OPENSSL_free(ptmp->sname);
218
0
        OPENSSL_free(ptmp);
219
0
    }
220
0
    return 0;
221
0
}
222
223
static void xptable_free(X509_PURPOSE *p)
224
0
{
225
0
    if (p == NULL)
226
0
        return;
227
0
    if ((p->flags & X509_PURPOSE_DYNAMIC) != 0) {
228
0
        if ((p->flags & X509_PURPOSE_DYNAMIC_NAME) != 0) {
229
0
            OPENSSL_free(p->name);
230
0
            OPENSSL_free(p->sname);
231
0
        }
232
0
        OPENSSL_free(p);
233
0
    }
234
0
}
235
236
void X509_PURPOSE_cleanup(void)
237
0
{
238
0
    sk_X509_PURPOSE_pop_free(xptable, xptable_free);
239
0
    xptable = NULL;
240
0
}
241
242
int X509_PURPOSE_get_id(const X509_PURPOSE *xp)
243
0
{
244
0
    return xp->purpose;
245
0
}
246
247
char *X509_PURPOSE_get0_name(const X509_PURPOSE *xp)
248
0
{
249
0
    return xp->name;
250
0
}
251
252
char *X509_PURPOSE_get0_sname(const X509_PURPOSE *xp)
253
0
{
254
0
    return xp->sname;
255
0
}
256
257
int X509_PURPOSE_get_trust(const X509_PURPOSE *xp)
258
0
{
259
0
    return xp->trust;
260
0
}
261
262
static int nid_cmp(const int *a, const int *b)
263
0
{
264
0
    return *a - *b;
265
0
}
266
267
DECLARE_OBJ_BSEARCH_CMP_FN(int, int, nid);
268
IMPLEMENT_OBJ_BSEARCH_CMP_FN(int, int, nid);
269
270
int X509_supported_extension(X509_EXTENSION *ex)
271
0
{
272
    /*
273
     * This table is a list of the NIDs of supported extensions: that is
274
     * those which are used by the verify process. If an extension is
275
     * critical and doesn't appear in this list then the verify process will
276
     * normally reject the certificate. The list must be kept in numerical
277
     * order because it will be searched using bsearch.
278
     */
279
0
    static const int supported_nids[] = {
280
0
        NID_netscape_cert_type, /* 71 */
281
0
        NID_key_usage,          /* 83 */
282
0
        NID_subject_alt_name,   /* 85 */
283
0
        NID_basic_constraints,  /* 87 */
284
0
        NID_certificate_policies, /* 89 */
285
0
        NID_crl_distribution_points, /* 103 */
286
0
        NID_ext_key_usage,      /* 126 */
287
0
#ifndef OPENSSL_NO_RFC3779
288
0
        NID_sbgp_ipAddrBlock,   /* 290 */
289
0
        NID_sbgp_autonomousSysNum, /* 291 */
290
0
#endif
291
0
        NID_id_pkix_OCSP_noCheck, /* 369 */
292
0
        NID_policy_constraints, /* 401 */
293
0
        NID_proxyCertInfo,      /* 663 */
294
0
        NID_name_constraints,   /* 666 */
295
0
        NID_policy_mappings,    /* 747 */
296
0
        NID_inhibit_any_policy  /* 748 */
297
0
    };
298
299
0
    int ex_nid = OBJ_obj2nid(X509_EXTENSION_get_object(ex));
300
301
0
    if (ex_nid == NID_undef)
302
0
        return 0;
303
304
0
    if (OBJ_bsearch_nid(&ex_nid, supported_nids, OSSL_NELEM(supported_nids)))
305
0
        return 1;
306
0
    return 0;
307
0
}
308
309
/* Returns 1 on success, 0 if x is invalid, -1 on (internal) error. */
310
static int setup_dp(const X509 *x, DIST_POINT *dp)
311
0
{
312
0
    const X509_NAME *iname = NULL;
313
0
    int i;
314
315
0
    if (dp->distpoint == NULL && sk_GENERAL_NAME_num(dp->CRLissuer) <= 0) {
316
0
        ERR_raise(ERR_LIB_X509, X509_R_INVALID_DISTPOINT);
317
0
        return 0;
318
0
    }
319
0
    if (dp->reasons != NULL) {
320
0
        if (dp->reasons->length > 0)
321
0
            dp->dp_reasons = dp->reasons->data[0];
322
0
        if (dp->reasons->length > 1)
323
0
            dp->dp_reasons |= (dp->reasons->data[1] << 8);
324
0
        dp->dp_reasons &= CRLDP_ALL_REASONS;
325
0
    } else {
326
0
        dp->dp_reasons = CRLDP_ALL_REASONS;
327
0
    }
328
0
    if (dp->distpoint == NULL || dp->distpoint->type != 1)
329
0
        return 1;
330
331
    /* Handle name fragment given by nameRelativeToCRLIssuer */
332
    /*
333
     * Note that the below way of determining iname is not really compliant
334
     * with https://tools.ietf.org/html/rfc5280#section-4.2.1.13
335
     * According to it, sk_GENERAL_NAME_num(dp->CRLissuer) MUST be <= 1
336
     * and any CRLissuer could be of type different to GEN_DIRNAME.
337
     */
338
0
    for (i = 0; i < sk_GENERAL_NAME_num(dp->CRLissuer); i++) {
339
0
        GENERAL_NAME *gen = sk_GENERAL_NAME_value(dp->CRLissuer, i);
340
341
0
        if (gen->type == GEN_DIRNAME) {
342
0
            iname = gen->d.directoryName;
343
0
            break;
344
0
        }
345
0
    }
346
0
    if (iname == NULL)
347
0
        iname = X509_get_issuer_name(x);
348
0
    return DIST_POINT_set_dpname(dp->distpoint, iname) ? 1 : -1;
349
0
}
350
351
/* Return 1 on success, 0 if x is invalid, -1 on (internal) error. */
352
static int setup_crldp(X509 *x)
353
0
{
354
0
    int i;
355
356
0
    x->crldp = X509_get_ext_d2i(x, NID_crl_distribution_points, &i, NULL);
357
0
    if (x->crldp == NULL && i != -1)
358
0
        return 0;
359
360
0
    for (i = 0; i < sk_DIST_POINT_num(x->crldp); i++) {
361
0
        int res = setup_dp(x, sk_DIST_POINT_value(x->crldp, i));
362
363
0
        if (res < 1)
364
0
            return res;
365
0
    }
366
0
    return 1;
367
0
}
368
369
/* Check that issuer public key algorithm matches subject signature algorithm */
370
static int check_sig_alg_match(const EVP_PKEY *issuer_key, const X509 *subject)
371
0
{
372
0
    int subj_sig_nid;
373
374
0
    if (issuer_key == NULL)
375
0
        return X509_V_ERR_NO_ISSUER_PUBLIC_KEY;
376
0
    if (OBJ_find_sigid_algs(OBJ_obj2nid(subject->cert_info.signature.algorithm),
377
0
                            NULL, &subj_sig_nid) == 0)
378
0
        return X509_V_ERR_UNSUPPORTED_SIGNATURE_ALGORITHM;
379
0
    if (EVP_PKEY_is_a(issuer_key, OBJ_nid2sn(subj_sig_nid))
380
0
        || (EVP_PKEY_is_a(issuer_key, "RSA") && subj_sig_nid == NID_rsassaPss))
381
0
        return X509_V_OK;
382
0
    return X509_V_ERR_SIGNATURE_ALGORITHM_MISMATCH;
383
0
}
384
385
0
#define V1_ROOT (EXFLAG_V1 | EXFLAG_SS)
386
#define ku_reject(x, usage) \
387
0
    (((x)->ex_flags & EXFLAG_KUSAGE) != 0 && ((x)->ex_kusage & (usage)) == 0)
388
#define xku_reject(x, usage) \
389
0
    (((x)->ex_flags & EXFLAG_XKUSAGE) != 0 && ((x)->ex_xkusage & (usage)) == 0)
390
#define ns_reject(x, usage) \
391
0
    (((x)->ex_flags & EXFLAG_NSCERT) != 0 && ((x)->ex_nscert & (usage)) == 0)
392
393
/*
394
 * Cache info on various X.509v3 extensions and further derived information,
395
 * e.g., if cert 'x' is self-issued, in x->ex_flags and other internal fields.
396
 * x->sha1_hash is filled in, or else EXFLAG_NO_FINGERPRINT is set in x->flags.
397
 * X509_SIG_INFO_VALID is set in x->flags if x->siginf was filled successfully.
398
 * Set EXFLAG_INVALID and return 0 in case the certificate is invalid.
399
 */
400
int ossl_x509v3_cache_extensions(X509 *x)
401
0
{
402
0
    BASIC_CONSTRAINTS *bs;
403
0
    PROXY_CERT_INFO_EXTENSION *pci;
404
0
    ASN1_BIT_STRING *usage;
405
0
    ASN1_BIT_STRING *ns;
406
0
    EXTENDED_KEY_USAGE *extusage;
407
0
    int i;
408
0
    int res;
409
410
0
#ifdef tsan_ld_acq
411
    /* Fast lock-free check, see end of the function for details. */
412
0
    if (tsan_ld_acq((TSAN_QUALIFIER int *)&x->ex_cached))
413
0
        return (x->ex_flags & EXFLAG_INVALID) == 0;
414
0
#endif
415
416
0
    if (!CRYPTO_THREAD_write_lock(x->lock))
417
0
        return 0;
418
0
    if ((x->ex_flags & EXFLAG_SET) != 0) { /* Cert has already been processed */
419
0
        CRYPTO_THREAD_unlock(x->lock);
420
0
        return (x->ex_flags & EXFLAG_INVALID) == 0;
421
0
    }
422
423
0
    ERR_set_mark();
424
425
    /* Cache the SHA1 digest of the cert */
426
0
    if (!X509_digest(x, EVP_sha1(), x->sha1_hash, NULL))
427
0
        x->ex_flags |= EXFLAG_NO_FINGERPRINT;
428
429
    /* V1 should mean no extensions ... */
430
0
    if (X509_get_version(x) == X509_VERSION_1)
431
0
        x->ex_flags |= EXFLAG_V1;
432
433
    /* Handle basic constraints */
434
0
    x->ex_pathlen = -1;
435
0
    if ((bs = X509_get_ext_d2i(x, NID_basic_constraints, &i, NULL)) != NULL) {
436
0
        if (bs->ca)
437
0
            x->ex_flags |= EXFLAG_CA;
438
0
        if (bs->pathlen != NULL) {
439
            /*
440
             * The error case !bs->ca is checked by check_chain()
441
             * in case ctx->param->flags & X509_V_FLAG_X509_STRICT
442
             */
443
0
            if (bs->pathlen->type == V_ASN1_NEG_INTEGER) {
444
0
                ERR_raise(ERR_LIB_X509V3, X509V3_R_NEGATIVE_PATHLEN);
445
0
                x->ex_flags |= EXFLAG_INVALID;
446
0
            } else {
447
0
                x->ex_pathlen = ASN1_INTEGER_get(bs->pathlen);
448
0
            }
449
0
        }
450
0
        BASIC_CONSTRAINTS_free(bs);
451
0
        x->ex_flags |= EXFLAG_BCONS;
452
0
    } else if (i != -1) {
453
0
        x->ex_flags |= EXFLAG_INVALID;
454
0
    }
455
456
    /* Handle proxy certificates */
457
0
    if ((pci = X509_get_ext_d2i(x, NID_proxyCertInfo, &i, NULL)) != NULL) {
458
0
        if ((x->ex_flags & EXFLAG_CA) != 0
459
0
            || X509_get_ext_by_NID(x, NID_subject_alt_name, -1) >= 0
460
0
            || X509_get_ext_by_NID(x, NID_issuer_alt_name, -1) >= 0) {
461
0
            x->ex_flags |= EXFLAG_INVALID;
462
0
        }
463
0
        if (pci->pcPathLengthConstraint != NULL)
464
0
            x->ex_pcpathlen = ASN1_INTEGER_get(pci->pcPathLengthConstraint);
465
0
        else
466
0
            x->ex_pcpathlen = -1;
467
0
        PROXY_CERT_INFO_EXTENSION_free(pci);
468
0
        x->ex_flags |= EXFLAG_PROXY;
469
0
    } else if (i != -1) {
470
0
        x->ex_flags |= EXFLAG_INVALID;
471
0
    }
472
473
    /* Handle (basic) key usage */
474
0
    if ((usage = X509_get_ext_d2i(x, NID_key_usage, &i, NULL)) != NULL) {
475
0
        x->ex_kusage = 0;
476
0
        if (usage->length > 0) {
477
0
            x->ex_kusage = usage->data[0];
478
0
            if (usage->length > 1)
479
0
                x->ex_kusage |= usage->data[1] << 8;
480
0
        }
481
0
        x->ex_flags |= EXFLAG_KUSAGE;
482
0
        ASN1_BIT_STRING_free(usage);
483
        /* Check for empty key usage according to RFC 5280 section 4.2.1.3 */
484
0
        if (x->ex_kusage == 0) {
485
0
            ERR_raise(ERR_LIB_X509V3, X509V3_R_EMPTY_KEY_USAGE);
486
0
            x->ex_flags |= EXFLAG_INVALID;
487
0
        }
488
0
    } else if (i != -1) {
489
0
        x->ex_flags |= EXFLAG_INVALID;
490
0
    }
491
492
    /* Handle extended key usage */
493
0
    x->ex_xkusage = 0;
494
0
    if ((extusage = X509_get_ext_d2i(x, NID_ext_key_usage, &i, NULL)) != NULL) {
495
0
        x->ex_flags |= EXFLAG_XKUSAGE;
496
0
        for (i = 0; i < sk_ASN1_OBJECT_num(extusage); i++) {
497
0
            switch (OBJ_obj2nid(sk_ASN1_OBJECT_value(extusage, i))) {
498
0
            case NID_server_auth:
499
0
                x->ex_xkusage |= XKU_SSL_SERVER;
500
0
                break;
501
0
            case NID_client_auth:
502
0
                x->ex_xkusage |= XKU_SSL_CLIENT;
503
0
                break;
504
0
            case NID_email_protect:
505
0
                x->ex_xkusage |= XKU_SMIME;
506
0
                break;
507
0
            case NID_code_sign:
508
0
                x->ex_xkusage |= XKU_CODE_SIGN;
509
0
                break;
510
0
            case NID_ms_sgc:
511
0
            case NID_ns_sgc:
512
0
                x->ex_xkusage |= XKU_SGC;
513
0
                break;
514
0
            case NID_OCSP_sign:
515
0
                x->ex_xkusage |= XKU_OCSP_SIGN;
516
0
                break;
517
0
            case NID_time_stamp:
518
0
                x->ex_xkusage |= XKU_TIMESTAMP;
519
0
                break;
520
0
            case NID_dvcs:
521
0
                x->ex_xkusage |= XKU_DVCS;
522
0
                break;
523
0
            case NID_anyExtendedKeyUsage:
524
0
                x->ex_xkusage |= XKU_ANYEKU;
525
0
                break;
526
0
            default:
527
                /* Ignore unknown extended key usage */
528
0
                break;
529
0
            }
530
0
        }
531
0
        sk_ASN1_OBJECT_pop_free(extusage, ASN1_OBJECT_free);
532
0
    } else if (i != -1) {
533
0
        x->ex_flags |= EXFLAG_INVALID;
534
0
    }
535
536
    /* Handle legacy Netscape extension */
537
0
    if ((ns = X509_get_ext_d2i(x, NID_netscape_cert_type, &i, NULL)) != NULL) {
538
0
        if (ns->length > 0)
539
0
            x->ex_nscert = ns->data[0];
540
0
        else
541
0
            x->ex_nscert = 0;
542
0
        x->ex_flags |= EXFLAG_NSCERT;
543
0
        ASN1_BIT_STRING_free(ns);
544
0
    } else if (i != -1) {
545
0
        x->ex_flags |= EXFLAG_INVALID;
546
0
    }
547
548
    /* Handle subject key identifier and issuer/authority key identifier */
549
0
    x->skid = X509_get_ext_d2i(x, NID_subject_key_identifier, &i, NULL);
550
0
    if (x->skid == NULL && i != -1)
551
0
        x->ex_flags |= EXFLAG_INVALID;
552
553
0
    x->akid = X509_get_ext_d2i(x, NID_authority_key_identifier, &i, NULL);
554
0
    if (x->akid == NULL && i != -1)
555
0
        x->ex_flags |= EXFLAG_INVALID;
556
557
    /* Check if subject name matches issuer */
558
0
    if (X509_NAME_cmp(X509_get_subject_name(x), X509_get_issuer_name(x)) == 0) {
559
0
        x->ex_flags |= EXFLAG_SI; /* Cert is self-issued */
560
0
        if (X509_check_akid(x, x->akid) == X509_V_OK /* SKID matches AKID */
561
                /* .. and the signature alg matches the PUBKEY alg: */
562
0
                && check_sig_alg_match(X509_get0_pubkey(x), x) == X509_V_OK)
563
0
            x->ex_flags |= EXFLAG_SS; /* indicate self-signed */
564
        /* This is very related to ossl_x509_likely_issued(x, x) == X509_V_OK */
565
0
    }
566
567
    /* Handle subject alternative names and various other extensions */
568
0
    x->altname = X509_get_ext_d2i(x, NID_subject_alt_name, &i, NULL);
569
0
    if (x->altname == NULL && i != -1)
570
0
        x->ex_flags |= EXFLAG_INVALID;
571
0
    x->nc = X509_get_ext_d2i(x, NID_name_constraints, &i, NULL);
572
0
    if (x->nc == NULL && i != -1)
573
0
        x->ex_flags |= EXFLAG_INVALID;
574
575
    /* Handle CRL distribution point entries */
576
0
    res = setup_crldp(x);
577
0
    if (res == 0)
578
0
        x->ex_flags |= EXFLAG_INVALID;
579
580
0
#ifndef OPENSSL_NO_RFC3779
581
0
    x->rfc3779_addr = X509_get_ext_d2i(x, NID_sbgp_ipAddrBlock, &i, NULL);
582
0
    if (x->rfc3779_addr == NULL && i != -1)
583
0
        x->ex_flags |= EXFLAG_INVALID;
584
0
    x->rfc3779_asid = X509_get_ext_d2i(x, NID_sbgp_autonomousSysNum, &i, NULL);
585
0
    if (x->rfc3779_asid == NULL && i != -1)
586
0
        x->ex_flags |= EXFLAG_INVALID;
587
0
#endif
588
0
    for (i = 0; i < X509_get_ext_count(x); i++) {
589
0
        X509_EXTENSION *ex = X509_get_ext(x, i);
590
0
        int nid = OBJ_obj2nid(X509_EXTENSION_get_object(ex));
591
592
0
        if (nid == NID_freshest_crl)
593
0
            x->ex_flags |= EXFLAG_FRESHEST;
594
0
        if (!X509_EXTENSION_get_critical(ex))
595
0
            continue;
596
0
        if (!X509_supported_extension(ex)) {
597
0
            x->ex_flags |= EXFLAG_CRITICAL;
598
0
            break;
599
0
        }
600
0
        switch (nid) {
601
0
        case NID_basic_constraints:
602
0
            x->ex_flags |= EXFLAG_BCONS_CRITICAL;
603
0
            break;
604
0
        case NID_authority_key_identifier:
605
0
            x->ex_flags |= EXFLAG_AKID_CRITICAL;
606
0
            break;
607
0
        case NID_subject_key_identifier:
608
0
            x->ex_flags |= EXFLAG_SKID_CRITICAL;
609
0
            break;
610
0
        case NID_subject_alt_name:
611
0
            x->ex_flags |= EXFLAG_SAN_CRITICAL;
612
0
            break;
613
0
        default:
614
0
            break;
615
0
        }
616
0
    }
617
618
    /* Set x->siginf, ignoring errors due to unsupported algos */
619
0
    (void)ossl_x509_init_sig_info(x);
620
621
0
    x->ex_flags |= EXFLAG_SET; /* Indicate that cert has been processed */
622
0
#ifdef tsan_st_rel
623
0
    tsan_st_rel((TSAN_QUALIFIER int *)&x->ex_cached, 1);
624
    /*
625
     * Above store triggers fast lock-free check in the beginning of the
626
     * function. But one has to ensure that the structure is "stable", i.e.
627
     * all stores are visible on all processors. Hence the release fence.
628
     */
629
0
#endif
630
0
    ERR_pop_to_mark();
631
632
0
    if ((x->ex_flags & EXFLAG_INVALID) == 0) {
633
0
        CRYPTO_THREAD_unlock(x->lock);
634
0
        return 1;
635
0
    }
636
0
    CRYPTO_THREAD_unlock(x->lock);
637
0
    ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_CERTIFICATE);
638
0
    return 0;
639
0
}
640
641
/*-
642
 * CA checks common to all purposes
643
 * return codes:
644
 * 0 not a CA
645
 * 1 is a CA
646
 * 2 Only possible in older versions of openSSL when basicConstraints are absent
647
 *   new versions will not return this value. May be a CA
648
 * 3 basicConstraints absent but self-signed V1.
649
 * 4 basicConstraints absent but keyUsage present and keyCertSign asserted.
650
 * 5 Netscape specific CA Flags present
651
 */
652
653
static int check_ca(const X509 *x)
654
0
{
655
    /* keyUsage if present should allow cert signing */
656
0
    if (ku_reject(x, KU_KEY_CERT_SIGN))
657
0
        return 0;
658
0
    if ((x->ex_flags & EXFLAG_BCONS) != 0) {
659
        /* If basicConstraints says not a CA then say so */
660
0
        return (x->ex_flags & EXFLAG_CA) != 0;
661
0
    } else {
662
        /* We support V1 roots for...  uh, I don't really know why. */
663
0
        if ((x->ex_flags & V1_ROOT) == V1_ROOT)
664
0
            return 3;
665
        /*
666
         * If key usage present it must have certSign so tolerate it
667
         */
668
0
        else if ((x->ex_flags & EXFLAG_KUSAGE) != 0)
669
0
            return 4;
670
        /* Older certificates could have Netscape-specific CA types */
671
0
        else if ((x->ex_flags & EXFLAG_NSCERT) != 0
672
0
                 && (x->ex_nscert & NS_ANY_CA) != 0)
673
0
            return 5;
674
        /* Can this still be regarded a CA certificate?  I doubt it. */
675
0
        return 0;
676
0
    }
677
0
}
678
679
void X509_set_proxy_flag(X509 *x)
680
0
{
681
0
    if (CRYPTO_THREAD_write_lock(x->lock)) {
682
0
        x->ex_flags |= EXFLAG_PROXY;
683
0
        CRYPTO_THREAD_unlock(x->lock);
684
0
    }
685
0
}
686
687
void X509_set_proxy_pathlen(X509 *x, long l)
688
0
{
689
0
    x->ex_pcpathlen = l;
690
0
}
691
692
int X509_check_ca(X509 *x)
693
0
{
694
    /* Note 0 normally means "not a CA" - but in this case means error. */
695
0
    if (!ossl_x509v3_cache_extensions(x))
696
0
        return 0;
697
698
0
    return check_ca(x);
699
0
}
700
701
/* Check SSL CA: common checks for SSL client and server. */
702
static int check_ssl_ca(const X509 *x)
703
0
{
704
0
    int ca_ret = check_ca(x);
705
706
0
    if (ca_ret == 0)
707
0
        return 0;
708
    /* Check nsCertType if present */
709
0
    return ca_ret != 5 || (x->ex_nscert & NS_SSL_CA) != 0;
710
0
}
711
712
static int check_purpose_ssl_client(const X509_PURPOSE *xp, const X509 *x,
713
                                    int non_leaf)
714
0
{
715
0
    if (xku_reject(x, XKU_SSL_CLIENT))
716
0
        return 0;
717
0
    if (non_leaf)
718
0
        return check_ssl_ca(x);
719
    /* We need to do digital signatures or key agreement */
720
0
    if (ku_reject(x, KU_DIGITAL_SIGNATURE | KU_KEY_AGREEMENT))
721
0
        return 0;
722
    /* nsCertType if present should allow SSL client use */
723
0
    if (ns_reject(x, NS_SSL_CLIENT))
724
0
        return 0;
725
0
    return 1;
726
0
}
727
728
/*
729
 * Key usage needed for TLS/SSL server: digital signature, encipherment or
730
 * key agreement. The ssl code can check this more thoroughly for individual
731
 * key types.
732
 */
733
#define KU_TLS \
734
    KU_DIGITAL_SIGNATURE | KU_KEY_ENCIPHERMENT | KU_KEY_AGREEMENT
735
736
static int check_purpose_ssl_server(const X509_PURPOSE *xp, const X509 *x,
737
                                    int non_leaf)
738
0
{
739
0
    if (xku_reject(x, XKU_SSL_SERVER | XKU_SGC))
740
0
        return 0;
741
0
    if (non_leaf)
742
0
        return check_ssl_ca(x);
743
744
0
    if (ns_reject(x, NS_SSL_SERVER))
745
0
        return 0;
746
0
    if (ku_reject(x, KU_TLS))
747
0
        return 0;
748
749
0
    return 1;
750
751
0
}
752
753
static int check_purpose_ns_ssl_server(const X509_PURPOSE *xp, const X509 *x,
754
                                       int non_leaf)
755
0
{
756
0
    int ret = check_purpose_ssl_server(xp, x, non_leaf);
757
758
0
    if (!ret || non_leaf)
759
0
        return ret;
760
    /* We need to encipher or Netscape complains */
761
0
    return ku_reject(x, KU_KEY_ENCIPHERMENT) ? 0 : ret;
762
0
}
763
764
/* common S/MIME checks */
765
static int purpose_smime(const X509 *x, int non_leaf)
766
0
{
767
0
    if (xku_reject(x, XKU_SMIME))
768
0
        return 0;
769
0
    if (non_leaf) {
770
0
        int ca_ret = check_ca(x);
771
772
0
        if (ca_ret == 0)
773
0
            return 0;
774
        /* Check nsCertType if present */
775
0
        if (ca_ret != 5 || (x->ex_nscert & NS_SMIME_CA) != 0)
776
0
            return ca_ret;
777
0
        else
778
0
            return 0;
779
0
    }
780
0
    if ((x->ex_flags & EXFLAG_NSCERT) != 0) {
781
0
        if ((x->ex_nscert & NS_SMIME) != 0)
782
0
            return 1;
783
        /* Workaround for some buggy certificates */
784
0
        return (x->ex_nscert & NS_SSL_CLIENT) != 0 ? 2 : 0;
785
0
    }
786
0
    return 1;
787
0
}
788
789
static int check_purpose_smime_sign(const X509_PURPOSE *xp, const X509 *x,
790
                                    int non_leaf)
791
0
{
792
0
    int ret = purpose_smime(x, non_leaf);
793
794
0
    if (!ret || non_leaf)
795
0
        return ret;
796
0
    return ku_reject(x, KU_DIGITAL_SIGNATURE | KU_NON_REPUDIATION) ? 0 : ret;
797
0
}
798
799
static int check_purpose_smime_encrypt(const X509_PURPOSE *xp, const X509 *x,
800
                                       int non_leaf)
801
0
{
802
0
    int ret = purpose_smime(x, non_leaf);
803
804
0
    if (!ret || non_leaf)
805
0
        return ret;
806
0
    return ku_reject(x, KU_KEY_ENCIPHERMENT) ? 0 : ret;
807
0
}
808
809
static int check_purpose_crl_sign(const X509_PURPOSE *xp, const X509 *x,
810
                                  int non_leaf)
811
0
{
812
0
    if (non_leaf) {
813
0
        int ca_ret = check_ca(x);
814
815
0
        return ca_ret == 2 ? 0 : ca_ret;
816
0
    }
817
0
    return !ku_reject(x, KU_CRL_SIGN);
818
0
}
819
820
/*
821
 * OCSP helper: this is *not* a full OCSP check. It just checks that each CA
822
 * is valid. Additional checks must be made on the chain.
823
 */
824
static int check_purpose_ocsp_helper(const X509_PURPOSE *xp, const X509 *x,
825
                                     int non_leaf)
826
0
{
827
    /*
828
     * Must be a valid CA.  Should we really support the "I don't know" value
829
     * (2)?
830
     */
831
0
    if (non_leaf)
832
0
        return check_ca(x);
833
    /* Leaf certificate is checked in OCSP_verify() */
834
0
    return 1;
835
0
}
836
837
static int check_purpose_timestamp_sign(const X509_PURPOSE *xp, const X509 *x,
838
                                        int non_leaf)
839
0
{
840
0
    int i_ext;
841
842
    /*
843
     * If non_leaf is true we must check if this is a valid CA certificate.
844
     * The extra requirements by the CA/Browser Forum are not checked.
845
     */
846
0
    if (non_leaf)
847
0
        return check_ca(x);
848
849
    /*
850
     * Key Usage is checked according to RFC 5280 and
851
     * Extended Key Usage attributes is checked according to RFC 3161.
852
     * The extra (and somewhat conflicting) CA/Browser Forum
853
     * Baseline Requirements for the Issuance and Management of
854
     * Publicly‐Trusted Code Signing Certificates, Version 3.0.0,
855
     * Section 7.1.2.3: Code signing and Timestamp Certificate are not checked.
856
     */
857
    /*
858
     * Check the optional key usage field:
859
     * if Key Usage is present, it must be one of digitalSignature
860
     * and/or nonRepudiation (other values are not consistent and shall
861
     * be rejected).
862
     */
863
0
    if ((x->ex_flags & EXFLAG_KUSAGE) != 0
864
0
        && ((x->ex_kusage & ~(KU_NON_REPUDIATION | KU_DIGITAL_SIGNATURE)) ||
865
0
            !(x->ex_kusage & (KU_NON_REPUDIATION | KU_DIGITAL_SIGNATURE))))
866
0
        return 0;
867
868
    /* Only timestamp key usage is permitted and it's required. */
869
0
    if ((x->ex_flags & EXFLAG_XKUSAGE) == 0 || x->ex_xkusage != XKU_TIMESTAMP)
870
0
        return 0;
871
872
    /* Extended Key Usage MUST be critical */
873
0
    i_ext = X509_get_ext_by_NID(x, NID_ext_key_usage, -1);
874
0
    if (i_ext >= 0
875
0
            && !X509_EXTENSION_get_critical(X509_get_ext((X509 *)x, i_ext)))
876
0
        return 0;
877
0
    return 1;
878
0
}
879
880
static int check_purpose_code_sign(const X509_PURPOSE *xp, const X509 *x,
881
                                   int non_leaf)
882
0
{
883
0
    int i_ext;
884
885
    /*
886
     * If non_leaf is true we must check if this is a valid CA certificate.
887
     * The extra requirements by the CA/Browser Forum are not checked.
888
     */
889
0
    if (non_leaf)
890
0
        return check_ca(x);
891
892
    /*
893
     * Check the key usage and extended key usage fields:
894
     *
895
     * Reference: CA/Browser Forum,
896
     * Baseline Requirements for the Issuance and Management of
897
     * Publicly‐Trusted Code Signing Certificates, Version 3.0.0,
898
     * Section 7.1.2.3: Code signing and Timestamp Certificate
899
     *
900
     * Checking covers Key Usage and Extended Key Usage attributes.
901
     * The certificatePolicies, cRLDistributionPoints (CDP), and
902
     * authorityInformationAccess (AIA) extensions are so far not checked.
903
     */
904
    /* Key Usage */
905
0
    if ((x->ex_flags & EXFLAG_KUSAGE) == 0)
906
0
        return 0;
907
0
    if ((x->ex_kusage & KU_DIGITAL_SIGNATURE) == 0)
908
0
        return 0;
909
0
    if ((x->ex_kusage & (KU_KEY_CERT_SIGN | KU_CRL_SIGN)) != 0)
910
0
        return 0;
911
912
    /* Key Usage MUST be critical */
913
0
    i_ext = X509_get_ext_by_NID(x, NID_key_usage, -1);
914
0
    if (i_ext < 0)
915
0
        return 0;
916
0
    if (i_ext >= 0) {
917
0
        X509_EXTENSION *ext = X509_get_ext((X509 *)x, i_ext);
918
0
        if (!X509_EXTENSION_get_critical(ext))
919
0
            return 0;
920
0
    }
921
922
    /* Extended Key Usage */
923
0
    if ((x->ex_flags & EXFLAG_XKUSAGE) == 0)
924
0
        return 0;
925
0
    if ((x->ex_xkusage & XKU_CODE_SIGN) == 0)
926
0
        return 0;
927
0
    if ((x->ex_xkusage & (XKU_ANYEKU | XKU_SSL_SERVER)) != 0)
928
0
        return 0;
929
930
0
    return 1;
931
932
0
}
933
934
static int no_check_purpose(const X509_PURPOSE *xp, const X509 *x,
935
                            int non_leaf)
936
0
{
937
0
    return 1;
938
0
}
939
940
/*-
941
 * Various checks to see if one certificate potentially issued the second.
942
 * This can be used to prune a set of possible issuer certificates which
943
 * have been looked up using some simple method such as by subject name.
944
 * These are:
945
 * 1. issuer_name(subject) == subject_name(issuer)
946
 * 2. If akid(subject) exists, it matches the respective issuer fields.
947
 * 3. subject signature algorithm == issuer public key algorithm
948
 * 4. If key_usage(issuer) exists, it allows for signing subject.
949
 * Note that this does not include actually checking the signature.
950
 * Returns 0 for OK, or positive for reason for mismatch
951
 * where reason codes match those for X509_verify_cert().
952
 */
953
int X509_check_issued(X509 *issuer, X509 *subject)
954
0
{
955
0
    int ret;
956
957
0
    if ((ret = ossl_x509_likely_issued(issuer, subject)) != X509_V_OK)
958
0
        return ret;
959
0
    return ossl_x509_signing_allowed(issuer, subject);
960
0
}
961
962
/* do the checks 1., 2., and 3. as described above for X509_check_issued() */
963
int ossl_x509_likely_issued(X509 *issuer, X509 *subject)
964
0
{
965
0
    int ret;
966
967
0
    if (X509_NAME_cmp(X509_get_subject_name(issuer),
968
0
                      X509_get_issuer_name(subject)) != 0)
969
0
        return X509_V_ERR_SUBJECT_ISSUER_MISMATCH;
970
971
    /* set issuer->skid and subject->akid */
972
0
    if (!ossl_x509v3_cache_extensions(issuer)
973
0
            || !ossl_x509v3_cache_extensions(subject))
974
0
        return X509_V_ERR_UNSPECIFIED;
975
976
0
    ret = X509_check_akid(issuer, subject->akid);
977
0
    if (ret != X509_V_OK)
978
0
        return ret;
979
980
    /* Check if the subject signature alg matches the issuer's PUBKEY alg */
981
0
    return check_sig_alg_match(X509_get0_pubkey(issuer), subject);
982
0
}
983
984
/*-
985
 * Check if certificate I<issuer> is allowed to issue certificate I<subject>
986
 * according to the B<keyUsage> field of I<issuer> if present
987
 * depending on any proxyCertInfo extension of I<subject>.
988
 * Returns 0 for OK, or positive for reason for rejection
989
 * where reason codes match those for X509_verify_cert().
990
 */
991
int ossl_x509_signing_allowed(const X509 *issuer, const X509 *subject)
992
0
{
993
0
    if ((subject->ex_flags & EXFLAG_PROXY) != 0) {
994
0
        if (ku_reject(issuer, KU_DIGITAL_SIGNATURE))
995
0
            return X509_V_ERR_KEYUSAGE_NO_DIGITAL_SIGNATURE;
996
0
    } else if (ku_reject(issuer, KU_KEY_CERT_SIGN)) {
997
0
        return X509_V_ERR_KEYUSAGE_NO_CERTSIGN;
998
0
    }
999
0
    return X509_V_OK;
1000
0
}
1001
1002
int X509_check_akid(const X509 *issuer, const AUTHORITY_KEYID *akid)
1003
0
{
1004
0
    if (akid == NULL)
1005
0
        return X509_V_OK;
1006
1007
    /* Check key ids (if present) */
1008
0
    if (akid->keyid && issuer->skid &&
1009
0
        ASN1_OCTET_STRING_cmp(akid->keyid, issuer->skid))
1010
0
        return X509_V_ERR_AKID_SKID_MISMATCH;
1011
    /* Check serial number */
1012
0
    if (akid->serial &&
1013
0
        ASN1_INTEGER_cmp(X509_get0_serialNumber(issuer), akid->serial))
1014
0
        return X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
1015
    /* Check issuer name */
1016
0
    if (akid->issuer) {
1017
        /*
1018
         * Ugh, for some peculiar reason AKID includes SEQUENCE OF
1019
         * GeneralName. So look for a DirName. There may be more than one but
1020
         * we only take any notice of the first.
1021
         */
1022
0
        GENERAL_NAMES *gens = akid->issuer;
1023
0
        GENERAL_NAME *gen;
1024
0
        X509_NAME *nm = NULL;
1025
0
        int i;
1026
1027
0
        for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
1028
0
            gen = sk_GENERAL_NAME_value(gens, i);
1029
0
            if (gen->type == GEN_DIRNAME) {
1030
0
                nm = gen->d.dirn;
1031
0
                break;
1032
0
            }
1033
0
        }
1034
0
        if (nm != NULL && X509_NAME_cmp(nm, X509_get_issuer_name(issuer)) != 0)
1035
0
            return X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH;
1036
0
    }
1037
0
    return X509_V_OK;
1038
0
}
1039
1040
uint32_t X509_get_extension_flags(X509 *x)
1041
0
{
1042
    /* Call for side-effect of computing hash and caching extensions */
1043
0
    X509_check_purpose(x, -1, 0);
1044
0
    return x->ex_flags;
1045
0
}
1046
1047
uint32_t X509_get_key_usage(X509 *x)
1048
0
{
1049
    /* Call for side-effect of computing hash and caching extensions */
1050
0
    if (X509_check_purpose(x, -1, 0) != 1)
1051
0
        return 0;
1052
0
    return (x->ex_flags & EXFLAG_KUSAGE) != 0 ? x->ex_kusage : UINT32_MAX;
1053
0
}
1054
1055
uint32_t X509_get_extended_key_usage(X509 *x)
1056
0
{
1057
    /* Call for side-effect of computing hash and caching extensions */
1058
0
    if (X509_check_purpose(x, -1, 0) != 1)
1059
0
        return 0;
1060
0
    return (x->ex_flags & EXFLAG_XKUSAGE) != 0 ? x->ex_xkusage : UINT32_MAX;
1061
0
}
1062
1063
const ASN1_OCTET_STRING *X509_get0_subject_key_id(X509 *x)
1064
0
{
1065
    /* Call for side-effect of computing hash and caching extensions */
1066
0
    if (X509_check_purpose(x, -1, 0) != 1)
1067
0
        return NULL;
1068
0
    return x->skid;
1069
0
}
1070
1071
const ASN1_OCTET_STRING *X509_get0_authority_key_id(X509 *x)
1072
0
{
1073
    /* Call for side-effect of computing hash and caching extensions */
1074
0
    if (X509_check_purpose(x, -1, 0) != 1)
1075
0
        return NULL;
1076
0
    return (x->akid != NULL ? x->akid->keyid : NULL);
1077
0
}
1078
1079
const GENERAL_NAMES *X509_get0_authority_issuer(X509 *x)
1080
0
{
1081
    /* Call for side-effect of computing hash and caching extensions */
1082
0
    if (X509_check_purpose(x, -1, 0) != 1)
1083
0
        return NULL;
1084
0
    return (x->akid != NULL ? x->akid->issuer : NULL);
1085
0
}
1086
1087
const ASN1_INTEGER *X509_get0_authority_serial(X509 *x)
1088
0
{
1089
    /* Call for side-effect of computing hash and caching extensions */
1090
0
    if (X509_check_purpose(x, -1, 0) != 1)
1091
0
        return NULL;
1092
0
    return (x->akid != NULL ? x->akid->serial : NULL);
1093
0
}
1094
1095
long X509_get_pathlen(X509 *x)
1096
0
{
1097
    /* Called for side effect of caching extensions */
1098
0
    if (X509_check_purpose(x, -1, 0) != 1
1099
0
            || (x->ex_flags & EXFLAG_BCONS) == 0)
1100
0
        return -1;
1101
0
    return x->ex_pathlen;
1102
0
}
1103
1104
long X509_get_proxy_pathlen(X509 *x)
1105
0
{
1106
    /* Called for side effect of caching extensions */
1107
0
    if (X509_check_purpose(x, -1, 0) != 1
1108
0
            || (x->ex_flags & EXFLAG_PROXY) == 0)
1109
0
        return -1;
1110
0
    return x->ex_pcpathlen;
1111
0
}