Commit | Line | Data |
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c26fd69f DH |
1 | /* X.509 certificate parser |
2 | * | |
3 | * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public Licence | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the Licence, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #define pr_fmt(fmt) "X.509: "fmt | |
13 | #include <linux/kernel.h> | |
ace0107a | 14 | #include <linux/export.h> |
c26fd69f DH |
15 | #include <linux/slab.h> |
16 | #include <linux/err.h> | |
17 | #include <linux/oid_registry.h> | |
db6c43bd | 18 | #include <crypto/public_key.h> |
c26fd69f DH |
19 | #include "x509_parser.h" |
20 | #include "x509-asn1.h" | |
b92e6570 | 21 | #include "x509_akid-asn1.h" |
c26fd69f DH |
22 | |
23 | struct x509_parse_context { | |
24 | struct x509_certificate *cert; /* Certificate being constructed */ | |
25 | unsigned long data; /* Start of data */ | |
26 | const void *cert_start; /* Start of cert content */ | |
27 | const void *key; /* Key data */ | |
28 | size_t key_size; /* Size of key data */ | |
29 | enum OID last_oid; /* Last OID encountered */ | |
30 | enum OID algo_oid; /* Algorithm OID */ | |
31 | unsigned char nr_mpi; /* Number of MPIs stored */ | |
32 | u8 o_size; /* Size of organizationName (O) */ | |
33 | u8 cn_size; /* Size of commonName (CN) */ | |
34 | u8 email_size; /* Size of emailAddress */ | |
35 | u16 o_offset; /* Offset of organizationName (O) */ | |
36 | u16 cn_offset; /* Offset of commonName (CN) */ | |
37 | u16 email_offset; /* Offset of emailAddress */ | |
b92e6570 DH |
38 | unsigned raw_akid_size; |
39 | const void *raw_akid; /* Raw authorityKeyId in ASN.1 */ | |
40 | const void *akid_raw_issuer; /* Raw directoryName in authorityKeyId */ | |
41 | unsigned akid_raw_issuer_size; | |
c26fd69f DH |
42 | }; |
43 | ||
44 | /* | |
45 | * Free an X.509 certificate | |
46 | */ | |
47 | void x509_free_certificate(struct x509_certificate *cert) | |
48 | { | |
49 | if (cert) { | |
3b764563 | 50 | public_key_free(cert->pub); |
c26fd69f DH |
51 | kfree(cert->issuer); |
52 | kfree(cert->subject); | |
46963b77 DH |
53 | kfree(cert->id); |
54 | kfree(cert->skid); | |
b92e6570 DH |
55 | kfree(cert->akid_id); |
56 | kfree(cert->akid_skid); | |
b426beb6 | 57 | kfree(cert->sig.digest); |
db6c43bd | 58 | kfree(cert->sig.s); |
c26fd69f DH |
59 | kfree(cert); |
60 | } | |
61 | } | |
ace0107a | 62 | EXPORT_SYMBOL_GPL(x509_free_certificate); |
c26fd69f DH |
63 | |
64 | /* | |
65 | * Parse an X.509 certificate | |
66 | */ | |
67 | struct x509_certificate *x509_cert_parse(const void *data, size_t datalen) | |
68 | { | |
69 | struct x509_certificate *cert; | |
70 | struct x509_parse_context *ctx; | |
46963b77 | 71 | struct asymmetric_key_id *kid; |
c26fd69f DH |
72 | long ret; |
73 | ||
74 | ret = -ENOMEM; | |
75 | cert = kzalloc(sizeof(struct x509_certificate), GFP_KERNEL); | |
76 | if (!cert) | |
77 | goto error_no_cert; | |
78 | cert->pub = kzalloc(sizeof(struct public_key), GFP_KERNEL); | |
79 | if (!cert->pub) | |
80 | goto error_no_ctx; | |
81 | ctx = kzalloc(sizeof(struct x509_parse_context), GFP_KERNEL); | |
82 | if (!ctx) | |
83 | goto error_no_ctx; | |
84 | ||
85 | ctx->cert = cert; | |
86 | ctx->data = (unsigned long)data; | |
87 | ||
88 | /* Attempt to decode the certificate */ | |
89 | ret = asn1_ber_decoder(&x509_decoder, ctx, data, datalen); | |
90 | if (ret < 0) | |
91 | goto error_decode; | |
92 | ||
b92e6570 DH |
93 | /* Decode the AuthorityKeyIdentifier */ |
94 | if (ctx->raw_akid) { | |
95 | pr_devel("AKID: %u %*phN\n", | |
96 | ctx->raw_akid_size, ctx->raw_akid_size, ctx->raw_akid); | |
97 | ret = asn1_ber_decoder(&x509_akid_decoder, ctx, | |
98 | ctx->raw_akid, ctx->raw_akid_size); | |
99 | if (ret < 0) { | |
100 | pr_warn("Couldn't decode AuthKeyIdentifier\n"); | |
101 | goto error_decode; | |
102 | } | |
103 | } | |
104 | ||
db6c43bd TS |
105 | cert->pub->key = kmemdup(ctx->key, ctx->key_size, GFP_KERNEL); |
106 | if (!cert->pub->key) | |
c26fd69f DH |
107 | goto error_decode; |
108 | ||
db6c43bd TS |
109 | cert->pub->keylen = ctx->key_size; |
110 | ||
46963b77 DH |
111 | /* Generate cert issuer + serial number key ID */ |
112 | kid = asymmetric_key_generate_id(cert->raw_serial, | |
113 | cert->raw_serial_size, | |
114 | cert->raw_issuer, | |
115 | cert->raw_issuer_size); | |
116 | if (IS_ERR(kid)) { | |
117 | ret = PTR_ERR(kid); | |
118 | goto error_decode; | |
119 | } | |
120 | cert->id = kid; | |
121 | ||
c26fd69f DH |
122 | kfree(ctx); |
123 | return cert; | |
124 | ||
125 | error_decode: | |
db6c43bd | 126 | kfree(cert->pub->key); |
c26fd69f DH |
127 | kfree(ctx); |
128 | error_no_ctx: | |
129 | x509_free_certificate(cert); | |
130 | error_no_cert: | |
131 | return ERR_PTR(ret); | |
132 | } | |
ace0107a | 133 | EXPORT_SYMBOL_GPL(x509_cert_parse); |
c26fd69f DH |
134 | |
135 | /* | |
136 | * Note an OID when we find one for later processing when we know how | |
137 | * to interpret it. | |
138 | */ | |
139 | int x509_note_OID(void *context, size_t hdrlen, | |
140 | unsigned char tag, | |
141 | const void *value, size_t vlen) | |
142 | { | |
143 | struct x509_parse_context *ctx = context; | |
144 | ||
145 | ctx->last_oid = look_up_OID(value, vlen); | |
146 | if (ctx->last_oid == OID__NR) { | |
147 | char buffer[50]; | |
148 | sprint_oid(value, vlen, buffer, sizeof(buffer)); | |
cf75446e | 149 | pr_debug("Unknown OID: [%lu] %s\n", |
c26fd69f DH |
150 | (unsigned long)value - ctx->data, buffer); |
151 | } | |
152 | return 0; | |
153 | } | |
154 | ||
155 | /* | |
156 | * Save the position of the TBS data so that we can check the signature over it | |
157 | * later. | |
158 | */ | |
159 | int x509_note_tbs_certificate(void *context, size_t hdrlen, | |
160 | unsigned char tag, | |
161 | const void *value, size_t vlen) | |
162 | { | |
163 | struct x509_parse_context *ctx = context; | |
164 | ||
165 | pr_debug("x509_note_tbs_certificate(,%zu,%02x,%ld,%zu)!\n", | |
166 | hdrlen, tag, (unsigned long)value - ctx->data, vlen); | |
167 | ||
168 | ctx->cert->tbs = value - hdrlen; | |
169 | ctx->cert->tbs_size = vlen + hdrlen; | |
170 | return 0; | |
171 | } | |
172 | ||
173 | /* | |
174 | * Record the public key algorithm | |
175 | */ | |
176 | int x509_note_pkey_algo(void *context, size_t hdrlen, | |
177 | unsigned char tag, | |
178 | const void *value, size_t vlen) | |
179 | { | |
180 | struct x509_parse_context *ctx = context; | |
181 | ||
182 | pr_debug("PubKey Algo: %u\n", ctx->last_oid); | |
183 | ||
184 | switch (ctx->last_oid) { | |
185 | case OID_md2WithRSAEncryption: | |
186 | case OID_md3WithRSAEncryption: | |
187 | default: | |
188 | return -ENOPKG; /* Unsupported combination */ | |
189 | ||
190 | case OID_md4WithRSAEncryption: | |
4e8ae72a DH |
191 | ctx->cert->sig.hash_algo = "md4"; |
192 | ctx->cert->sig.pkey_algo = "rsa"; | |
c26fd69f DH |
193 | break; |
194 | ||
195 | case OID_sha1WithRSAEncryption: | |
4e8ae72a DH |
196 | ctx->cert->sig.hash_algo = "sha1"; |
197 | ctx->cert->sig.pkey_algo = "rsa"; | |
c26fd69f DH |
198 | break; |
199 | ||
200 | case OID_sha256WithRSAEncryption: | |
4e8ae72a DH |
201 | ctx->cert->sig.hash_algo = "sha256"; |
202 | ctx->cert->sig.pkey_algo = "rsa"; | |
c26fd69f DH |
203 | break; |
204 | ||
205 | case OID_sha384WithRSAEncryption: | |
4e8ae72a DH |
206 | ctx->cert->sig.hash_algo = "sha384"; |
207 | ctx->cert->sig.pkey_algo = "rsa"; | |
c26fd69f DH |
208 | break; |
209 | ||
210 | case OID_sha512WithRSAEncryption: | |
4e8ae72a DH |
211 | ctx->cert->sig.hash_algo = "sha512"; |
212 | ctx->cert->sig.pkey_algo = "rsa"; | |
c26fd69f DH |
213 | break; |
214 | ||
215 | case OID_sha224WithRSAEncryption: | |
4e8ae72a DH |
216 | ctx->cert->sig.hash_algo = "sha224"; |
217 | ctx->cert->sig.pkey_algo = "rsa"; | |
c26fd69f DH |
218 | break; |
219 | } | |
220 | ||
221 | ctx->algo_oid = ctx->last_oid; | |
222 | return 0; | |
223 | } | |
224 | ||
225 | /* | |
226 | * Note the whereabouts and type of the signature. | |
227 | */ | |
228 | int x509_note_signature(void *context, size_t hdrlen, | |
229 | unsigned char tag, | |
230 | const void *value, size_t vlen) | |
231 | { | |
232 | struct x509_parse_context *ctx = context; | |
233 | ||
234 | pr_debug("Signature type: %u size %zu\n", ctx->last_oid, vlen); | |
235 | ||
236 | if (ctx->last_oid != ctx->algo_oid) { | |
237 | pr_warn("Got cert with pkey (%u) and sig (%u) algorithm OIDs\n", | |
238 | ctx->algo_oid, ctx->last_oid); | |
239 | return -EINVAL; | |
240 | } | |
241 | ||
b426beb6 DH |
242 | ctx->cert->raw_sig = value; |
243 | ctx->cert->raw_sig_size = vlen; | |
c26fd69f DH |
244 | return 0; |
245 | } | |
246 | ||
84aabd46 DH |
247 | /* |
248 | * Note the certificate serial number | |
249 | */ | |
250 | int x509_note_serial(void *context, size_t hdrlen, | |
251 | unsigned char tag, | |
252 | const void *value, size_t vlen) | |
253 | { | |
254 | struct x509_parse_context *ctx = context; | |
255 | ctx->cert->raw_serial = value; | |
256 | ctx->cert->raw_serial_size = vlen; | |
257 | return 0; | |
258 | } | |
259 | ||
c26fd69f DH |
260 | /* |
261 | * Note some of the name segments from which we'll fabricate a name. | |
262 | */ | |
263 | int x509_extract_name_segment(void *context, size_t hdrlen, | |
264 | unsigned char tag, | |
265 | const void *value, size_t vlen) | |
266 | { | |
267 | struct x509_parse_context *ctx = context; | |
268 | ||
269 | switch (ctx->last_oid) { | |
270 | case OID_commonName: | |
271 | ctx->cn_size = vlen; | |
272 | ctx->cn_offset = (unsigned long)value - ctx->data; | |
273 | break; | |
274 | case OID_organizationName: | |
275 | ctx->o_size = vlen; | |
276 | ctx->o_offset = (unsigned long)value - ctx->data; | |
277 | break; | |
278 | case OID_email_address: | |
279 | ctx->email_size = vlen; | |
280 | ctx->email_offset = (unsigned long)value - ctx->data; | |
281 | break; | |
282 | default: | |
283 | break; | |
284 | } | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Fabricate and save the issuer and subject names | |
291 | */ | |
292 | static int x509_fabricate_name(struct x509_parse_context *ctx, size_t hdrlen, | |
293 | unsigned char tag, | |
294 | char **_name, size_t vlen) | |
295 | { | |
296 | const void *name, *data = (const void *)ctx->data; | |
297 | size_t namesize; | |
298 | char *buffer; | |
299 | ||
300 | if (*_name) | |
301 | return -EINVAL; | |
302 | ||
303 | /* Empty name string if no material */ | |
304 | if (!ctx->cn_size && !ctx->o_size && !ctx->email_size) { | |
305 | buffer = kmalloc(1, GFP_KERNEL); | |
306 | if (!buffer) | |
307 | return -ENOMEM; | |
308 | buffer[0] = 0; | |
309 | goto done; | |
310 | } | |
311 | ||
312 | if (ctx->cn_size && ctx->o_size) { | |
313 | /* Consider combining O and CN, but use only the CN if it is | |
314 | * prefixed by the O, or a significant portion thereof. | |
315 | */ | |
316 | namesize = ctx->cn_size; | |
317 | name = data + ctx->cn_offset; | |
318 | if (ctx->cn_size >= ctx->o_size && | |
319 | memcmp(data + ctx->cn_offset, data + ctx->o_offset, | |
320 | ctx->o_size) == 0) | |
321 | goto single_component; | |
322 | if (ctx->cn_size >= 7 && | |
323 | ctx->o_size >= 7 && | |
324 | memcmp(data + ctx->cn_offset, data + ctx->o_offset, 7) == 0) | |
325 | goto single_component; | |
326 | ||
327 | buffer = kmalloc(ctx->o_size + 2 + ctx->cn_size + 1, | |
328 | GFP_KERNEL); | |
329 | if (!buffer) | |
330 | return -ENOMEM; | |
331 | ||
332 | memcpy(buffer, | |
333 | data + ctx->o_offset, ctx->o_size); | |
334 | buffer[ctx->o_size + 0] = ':'; | |
335 | buffer[ctx->o_size + 1] = ' '; | |
336 | memcpy(buffer + ctx->o_size + 2, | |
337 | data + ctx->cn_offset, ctx->cn_size); | |
338 | buffer[ctx->o_size + 2 + ctx->cn_size] = 0; | |
339 | goto done; | |
340 | ||
341 | } else if (ctx->cn_size) { | |
342 | namesize = ctx->cn_size; | |
343 | name = data + ctx->cn_offset; | |
344 | } else if (ctx->o_size) { | |
345 | namesize = ctx->o_size; | |
346 | name = data + ctx->o_offset; | |
347 | } else { | |
348 | namesize = ctx->email_size; | |
349 | name = data + ctx->email_offset; | |
350 | } | |
351 | ||
352 | single_component: | |
353 | buffer = kmalloc(namesize + 1, GFP_KERNEL); | |
354 | if (!buffer) | |
355 | return -ENOMEM; | |
356 | memcpy(buffer, name, namesize); | |
357 | buffer[namesize] = 0; | |
358 | ||
359 | done: | |
360 | *_name = buffer; | |
361 | ctx->cn_size = 0; | |
362 | ctx->o_size = 0; | |
363 | ctx->email_size = 0; | |
364 | return 0; | |
365 | } | |
366 | ||
367 | int x509_note_issuer(void *context, size_t hdrlen, | |
368 | unsigned char tag, | |
369 | const void *value, size_t vlen) | |
370 | { | |
371 | struct x509_parse_context *ctx = context; | |
84aabd46 DH |
372 | ctx->cert->raw_issuer = value; |
373 | ctx->cert->raw_issuer_size = vlen; | |
c26fd69f DH |
374 | return x509_fabricate_name(ctx, hdrlen, tag, &ctx->cert->issuer, vlen); |
375 | } | |
376 | ||
377 | int x509_note_subject(void *context, size_t hdrlen, | |
378 | unsigned char tag, | |
379 | const void *value, size_t vlen) | |
380 | { | |
381 | struct x509_parse_context *ctx = context; | |
84aabd46 DH |
382 | ctx->cert->raw_subject = value; |
383 | ctx->cert->raw_subject_size = vlen; | |
c26fd69f DH |
384 | return x509_fabricate_name(ctx, hdrlen, tag, &ctx->cert->subject, vlen); |
385 | } | |
386 | ||
387 | /* | |
388 | * Extract the data for the public key algorithm | |
389 | */ | |
390 | int x509_extract_key_data(void *context, size_t hdrlen, | |
391 | unsigned char tag, | |
392 | const void *value, size_t vlen) | |
393 | { | |
394 | struct x509_parse_context *ctx = context; | |
395 | ||
396 | if (ctx->last_oid != OID_rsaEncryption) | |
397 | return -ENOPKG; | |
398 | ||
4e8ae72a | 399 | ctx->cert->pub->pkey_algo = "rsa"; |
67f7d60b DH |
400 | |
401 | /* Discard the BIT STRING metadata */ | |
c26fd69f DH |
402 | ctx->key = value + 1; |
403 | ctx->key_size = vlen - 1; | |
404 | return 0; | |
405 | } | |
406 | ||
04b00bdb CYL |
407 | /* The keyIdentifier in AuthorityKeyIdentifier SEQUENCE is tag(CONT,PRIM,0) */ |
408 | #define SEQ_TAG_KEYID (ASN1_CONT << 6) | |
409 | ||
c26fd69f DH |
410 | /* |
411 | * Process certificate extensions that are used to qualify the certificate. | |
412 | */ | |
413 | int x509_process_extension(void *context, size_t hdrlen, | |
414 | unsigned char tag, | |
415 | const void *value, size_t vlen) | |
416 | { | |
417 | struct x509_parse_context *ctx = context; | |
46963b77 | 418 | struct asymmetric_key_id *kid; |
c26fd69f | 419 | const unsigned char *v = value; |
c26fd69f DH |
420 | |
421 | pr_debug("Extension: %u\n", ctx->last_oid); | |
422 | ||
423 | if (ctx->last_oid == OID_subjectKeyIdentifier) { | |
424 | /* Get hold of the key fingerprint */ | |
46963b77 | 425 | if (ctx->cert->skid || vlen < 3) |
c26fd69f DH |
426 | return -EBADMSG; |
427 | if (v[0] != ASN1_OTS || v[1] != vlen - 2) | |
428 | return -EBADMSG; | |
429 | v += 2; | |
430 | vlen -= 2; | |
431 | ||
dd2f6c44 DH |
432 | ctx->cert->raw_skid_size = vlen; |
433 | ctx->cert->raw_skid = v; | |
a4c6e57f | 434 | kid = asymmetric_key_generate_id(v, vlen, "", 0); |
46963b77 DH |
435 | if (IS_ERR(kid)) |
436 | return PTR_ERR(kid); | |
437 | ctx->cert->skid = kid; | |
438 | pr_debug("subjkeyid %*phN\n", kid->len, kid->data); | |
c26fd69f DH |
439 | return 0; |
440 | } | |
441 | ||
442 | if (ctx->last_oid == OID_authorityKeyIdentifier) { | |
443 | /* Get hold of the CA key fingerprint */ | |
b92e6570 DH |
444 | ctx->raw_akid = v; |
445 | ctx->raw_akid_size = vlen; | |
c26fd69f DH |
446 | return 0; |
447 | } | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
fd19a3d1 DH |
452 | /** |
453 | * x509_decode_time - Decode an X.509 time ASN.1 object | |
454 | * @_t: The time to fill in | |
455 | * @hdrlen: The length of the object header | |
456 | * @tag: The object tag | |
457 | * @value: The object value | |
458 | * @vlen: The size of the object value | |
459 | * | |
460 | * Decode an ASN.1 universal time or generalised time field into a struct the | |
461 | * kernel can handle and check it for validity. The time is decoded thus: | |
462 | * | |
463 | * [RFC5280 ยง4.1.2.5] | |
464 | * CAs conforming to this profile MUST always encode certificate validity | |
465 | * dates through the year 2049 as UTCTime; certificate validity dates in | |
466 | * 2050 or later MUST be encoded as GeneralizedTime. Conforming | |
467 | * applications MUST be able to process validity dates that are encoded in | |
468 | * either UTCTime or GeneralizedTime. | |
c26fd69f | 469 | */ |
fd19a3d1 DH |
470 | int x509_decode_time(time64_t *_t, size_t hdrlen, |
471 | unsigned char tag, | |
472 | const unsigned char *value, size_t vlen) | |
c26fd69f | 473 | { |
ac4cbedf | 474 | static const unsigned char month_lengths[] = { 31, 28, 31, 30, 31, 30, |
fd19a3d1 | 475 | 31, 31, 30, 31, 30, 31 }; |
c26fd69f | 476 | const unsigned char *p = value; |
fd19a3d1 | 477 | unsigned year, mon, day, hour, min, sec, mon_len; |
c26fd69f | 478 | |
fd19a3d1 | 479 | #define dec2bin(X) ({ unsigned char x = (X) - '0'; if (x > 9) goto invalid_time; x; }) |
c26fd69f DH |
480 | #define DD2bin(P) ({ unsigned x = dec2bin(P[0]) * 10 + dec2bin(P[1]); P += 2; x; }) |
481 | ||
482 | if (tag == ASN1_UNITIM) { | |
483 | /* UTCTime: YYMMDDHHMMSSZ */ | |
484 | if (vlen != 13) | |
485 | goto unsupported_time; | |
fd19a3d1 DH |
486 | year = DD2bin(p); |
487 | if (year >= 50) | |
488 | year += 1900; | |
c26fd69f | 489 | else |
fd19a3d1 | 490 | year += 2000; |
c26fd69f DH |
491 | } else if (tag == ASN1_GENTIM) { |
492 | /* GenTime: YYYYMMDDHHMMSSZ */ | |
493 | if (vlen != 15) | |
494 | goto unsupported_time; | |
fd19a3d1 DH |
495 | year = DD2bin(p) * 100 + DD2bin(p); |
496 | if (year >= 1950 && year <= 2049) | |
497 | goto invalid_time; | |
c26fd69f DH |
498 | } else { |
499 | goto unsupported_time; | |
500 | } | |
501 | ||
fd19a3d1 DH |
502 | mon = DD2bin(p); |
503 | day = DD2bin(p); | |
504 | hour = DD2bin(p); | |
505 | min = DD2bin(p); | |
506 | sec = DD2bin(p); | |
c26fd69f DH |
507 | |
508 | if (*p != 'Z') | |
509 | goto unsupported_time; | |
510 | ||
cc25b994 DH |
511 | if (year < 1970 || |
512 | mon < 1 || mon > 12) | |
513 | goto invalid_time; | |
514 | ||
515 | mon_len = month_lengths[mon - 1]; | |
fd19a3d1 DH |
516 | if (mon == 2) { |
517 | if (year % 4 == 0) { | |
518 | mon_len = 29; | |
519 | if (year % 100 == 0) { | |
ac4cbedf DH |
520 | mon_len = 28; |
521 | if (year % 400 == 0) | |
522 | mon_len = 29; | |
fd19a3d1 DH |
523 | } |
524 | } | |
525 | } | |
526 | ||
cc25b994 | 527 | if (day < 1 || day > mon_len || |
7650cb80 | 528 | hour > 24 || /* ISO 8601 permits 24:00:00 as midnight tomorrow */ |
4dd17c9c | 529 | min > 59 || |
da02559c | 530 | sec > 60) /* ISO 8601 permits leap seconds [X.680 46.3] */ |
fd19a3d1 | 531 | goto invalid_time; |
cc25b994 | 532 | |
fd19a3d1 | 533 | *_t = mktime64(year, mon, day, hour, min, sec); |
c26fd69f DH |
534 | return 0; |
535 | ||
536 | unsupported_time: | |
fd19a3d1 DH |
537 | pr_debug("Got unsupported time [tag %02x]: '%*phN'\n", |
538 | tag, (int)vlen, value); | |
539 | return -EBADMSG; | |
540 | invalid_time: | |
541 | pr_debug("Got invalid time [tag %02x]: '%*phN'\n", | |
542 | tag, (int)vlen, value); | |
c26fd69f DH |
543 | return -EBADMSG; |
544 | } | |
fd19a3d1 | 545 | EXPORT_SYMBOL_GPL(x509_decode_time); |
c26fd69f DH |
546 | |
547 | int x509_note_not_before(void *context, size_t hdrlen, | |
548 | unsigned char tag, | |
549 | const void *value, size_t vlen) | |
550 | { | |
551 | struct x509_parse_context *ctx = context; | |
fd19a3d1 | 552 | return x509_decode_time(&ctx->cert->valid_from, hdrlen, tag, value, vlen); |
c26fd69f DH |
553 | } |
554 | ||
555 | int x509_note_not_after(void *context, size_t hdrlen, | |
556 | unsigned char tag, | |
557 | const void *value, size_t vlen) | |
558 | { | |
559 | struct x509_parse_context *ctx = context; | |
fd19a3d1 | 560 | return x509_decode_time(&ctx->cert->valid_to, hdrlen, tag, value, vlen); |
c26fd69f | 561 | } |
b92e6570 DH |
562 | |
563 | /* | |
564 | * Note a key identifier-based AuthorityKeyIdentifier | |
565 | */ | |
566 | int x509_akid_note_kid(void *context, size_t hdrlen, | |
567 | unsigned char tag, | |
568 | const void *value, size_t vlen) | |
569 | { | |
570 | struct x509_parse_context *ctx = context; | |
571 | struct asymmetric_key_id *kid; | |
572 | ||
573 | pr_debug("AKID: keyid: %*phN\n", (int)vlen, value); | |
574 | ||
575 | if (ctx->cert->akid_skid) | |
576 | return 0; | |
577 | ||
a4c6e57f | 578 | kid = asymmetric_key_generate_id(value, vlen, "", 0); |
b92e6570 DH |
579 | if (IS_ERR(kid)) |
580 | return PTR_ERR(kid); | |
581 | pr_debug("authkeyid %*phN\n", kid->len, kid->data); | |
582 | ctx->cert->akid_skid = kid; | |
583 | return 0; | |
584 | } | |
585 | ||
586 | /* | |
587 | * Note a directoryName in an AuthorityKeyIdentifier | |
588 | */ | |
589 | int x509_akid_note_name(void *context, size_t hdrlen, | |
590 | unsigned char tag, | |
591 | const void *value, size_t vlen) | |
592 | { | |
593 | struct x509_parse_context *ctx = context; | |
594 | ||
595 | pr_debug("AKID: name: %*phN\n", (int)vlen, value); | |
596 | ||
597 | ctx->akid_raw_issuer = value; | |
598 | ctx->akid_raw_issuer_size = vlen; | |
599 | return 0; | |
600 | } | |
601 | ||
602 | /* | |
603 | * Note a serial number in an AuthorityKeyIdentifier | |
604 | */ | |
605 | int x509_akid_note_serial(void *context, size_t hdrlen, | |
606 | unsigned char tag, | |
607 | const void *value, size_t vlen) | |
608 | { | |
609 | struct x509_parse_context *ctx = context; | |
610 | struct asymmetric_key_id *kid; | |
611 | ||
612 | pr_debug("AKID: serial: %*phN\n", (int)vlen, value); | |
613 | ||
614 | if (!ctx->akid_raw_issuer || ctx->cert->akid_id) | |
615 | return 0; | |
616 | ||
617 | kid = asymmetric_key_generate_id(value, | |
618 | vlen, | |
619 | ctx->akid_raw_issuer, | |
620 | ctx->akid_raw_issuer_size); | |
621 | if (IS_ERR(kid)) | |
622 | return PTR_ERR(kid); | |
623 | ||
624 | pr_debug("authkeyid %*phN\n", kid->len, kid->data); | |
625 | ctx->cert->akid_id = kid; | |
626 | return 0; | |
627 | } |