xref: /openbsd/lib/libcrypto/asn1/t_x509.c (revision 09467b48) 
1 /* $OpenBSD: t_x509.c,v 1.32 2020/04/10 07:05:24 tb Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  *
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  *
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  *
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  *
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  *
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58 
59 #include <stdio.h>
60 
61 #include <openssl/opensslconf.h>
62 
63 #include <openssl/bn.h>
64 #include <openssl/buffer.h>
65 #include <openssl/err.h>
66 #include <openssl/objects.h>
67 #include <openssl/x509.h>
68 #include <openssl/x509v3.h>
69 
70 #ifndef OPENSSL_NO_DSA
71 #include <openssl/dsa.h>
72 #endif
73 #ifndef OPENSSL_NO_EC
74 #include <openssl/ec.h>
75 #endif
76 #ifndef OPENSSL_NO_RSA
77 #include <openssl/rsa.h>
78 #endif
79 
80 #include "asn1_locl.h"
81 
82 int
83 X509_print_fp(FILE *fp, X509 *x)
84 {
85 	return X509_print_ex_fp(fp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
86 }
87 
88 int
89 X509_print_ex_fp(FILE *fp, X509 *x, unsigned long nmflag, unsigned long cflag)
90 {
91 	BIO *b;
92 	int ret;
93 
94 	if ((b = BIO_new(BIO_s_file())) == NULL) {
95 		X509error(ERR_R_BUF_LIB);
96 		return (0);
97 	}
98 	BIO_set_fp(b, fp, BIO_NOCLOSE);
99 	ret = X509_print_ex(b, x, nmflag, cflag);
100 	BIO_free(b);
101 	return (ret);
102 }
103 
104 int
105 X509_print(BIO *bp, X509 *x)
106 {
107 	return X509_print_ex(bp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
108 }
109 
110 int
111 X509_print_ex(BIO *bp, X509 *x, unsigned long nmflags, unsigned long cflag)
112 {
113 	long l;
114 	int ret = 0, i;
115 	char *m = NULL, mlch = ' ';
116 	int nmindent = 0;
117 	X509_CINF *ci;
118 	ASN1_INTEGER *bs;
119 	EVP_PKEY *pkey = NULL;
120 	const char *neg;
121 
122 	if ((nmflags & XN_FLAG_SEP_MASK) == XN_FLAG_SEP_MULTILINE) {
123 		mlch = '\n';
124 		nmindent = 12;
125 	}
126 
127 	if (nmflags == X509_FLAG_COMPAT)
128 		nmindent = 16;
129 
130 	ci = x->cert_info;
131 	if (!(cflag & X509_FLAG_NO_HEADER)) {
132 		if (BIO_write(bp, "Certificate:\n", 13) <= 0)
133 			goto err;
134 		if (BIO_write(bp, "    Data:\n", 10) <= 0)
135 			goto err;
136 	}
137 	if (!(cflag & X509_FLAG_NO_VERSION)) {
138 		l = X509_get_version(x);
139 		if (BIO_printf(bp, "%8sVersion: %lu (0x%lx)\n",
140 		    "", l + 1, l) <= 0)
141 			goto err;
142 	}
143 	if (!(cflag & X509_FLAG_NO_SERIAL)) {
144 		if (BIO_write(bp, "        Serial Number:", 22) <= 0)
145 			goto err;
146 
147 		bs = X509_get_serialNumber(x);
148 		l = -1;
149 		if (bs->length <= (int)sizeof(long))
150 			l = ASN1_INTEGER_get(bs);
151 		if (l != -1) {
152 			if (bs->type == V_ASN1_NEG_INTEGER) {
153 				l = -l;
154 				neg = "-";
155 			} else
156 				neg = "";
157 			if (BIO_printf(bp, " %s%lu (%s0x%lx)\n",
158 			    neg, l, neg, l) <= 0)
159 				goto err;
160 		} else {
161 			neg = (bs->type == V_ASN1_NEG_INTEGER) ?
162 			    " (Negative)" : "";
163 			if (BIO_printf(bp, "\n%12s%s", "", neg) <= 0)
164 				goto err;
165 			for (i = 0; i < bs->length; i++) {
166 				if (BIO_printf(bp, "%02x%c", bs->data[i],
167 				    ((i + 1 == bs->length) ? '\n' : ':')) <= 0)
168 					goto err;
169 			}
170 		}
171 
172 	}
173 
174 	if (!(cflag & X509_FLAG_NO_SIGNAME)) {
175 		if (X509_signature_print(bp, x->sig_alg, NULL) <= 0)
176 			goto err;
177 	}
178 
179 	if (!(cflag & X509_FLAG_NO_ISSUER)) {
180 		if (BIO_printf(bp, "        Issuer:%c", mlch) <= 0)
181 			goto err;
182 		if (X509_NAME_print_ex(bp, X509_get_issuer_name(x),
183 		    nmindent, nmflags) < 0)
184 			goto err;
185 		if (BIO_write(bp, "\n", 1) <= 0)
186 			goto err;
187 	}
188 	if (!(cflag & X509_FLAG_NO_VALIDITY)) {
189 		if (BIO_write(bp, "        Validity\n", 17) <= 0)
190 			goto err;
191 		if (BIO_write(bp, "            Not Before: ", 24) <= 0)
192 			goto err;
193 		if (!ASN1_TIME_print(bp, X509_get_notBefore(x)))
194 			goto err;
195 		if (BIO_write(bp, "\n            Not After : ", 25) <= 0)
196 			goto err;
197 		if (!ASN1_TIME_print(bp, X509_get_notAfter(x)))
198 			goto err;
199 		if (BIO_write(bp, "\n", 1) <= 0)
200 			goto err;
201 	}
202 	if (!(cflag & X509_FLAG_NO_SUBJECT)) {
203 		if (BIO_printf(bp, "        Subject:%c", mlch) <= 0)
204 			goto err;
205 		if (X509_NAME_print_ex(bp, X509_get_subject_name(x),
206 		    nmindent, nmflags) < 0)
207 			goto err;
208 		if (BIO_write(bp, "\n", 1) <= 0)
209 			goto err;
210 	}
211 	if (!(cflag & X509_FLAG_NO_PUBKEY)) {
212 		if (BIO_write(bp, "        Subject Public Key Info:\n",
213 		    33) <= 0)
214 			goto err;
215 		if (BIO_printf(bp, "%12sPublic Key Algorithm: ", "") <= 0)
216 			goto err;
217 		if (i2a_ASN1_OBJECT(bp, ci->key->algor->algorithm) <= 0)
218 			goto err;
219 		if (BIO_puts(bp, "\n") <= 0)
220 			goto err;
221 
222 		pkey = X509_get_pubkey(x);
223 		if (pkey == NULL) {
224 			BIO_printf(bp, "%12sUnable to load Public Key\n", "");
225 			ERR_print_errors(bp);
226 		} else {
227 			EVP_PKEY_print_public(bp, pkey, 16, NULL);
228 			EVP_PKEY_free(pkey);
229 		}
230 	}
231 
232 	if (!(cflag & X509_FLAG_NO_EXTENSIONS))
233 		X509V3_extensions_print(bp, "X509v3 extensions",
234 		    ci->extensions, cflag, 8);
235 
236 	if (!(cflag & X509_FLAG_NO_SIGDUMP)) {
237 		if (X509_signature_print(bp, x->sig_alg, x->signature) <= 0)
238 			goto err;
239 	}
240 	if (!(cflag & X509_FLAG_NO_AUX)) {
241 		if (!X509_CERT_AUX_print(bp, x->aux, 0))
242 			goto err;
243 	}
244 	ret = 1;
245 
246 err:
247 	free(m);
248 	return (ret);
249 }
250 
251 int
252 X509_ocspid_print(BIO *bp, X509 *x)
253 {
254 	unsigned char *der = NULL;
255 	unsigned char *dertmp;
256 	int derlen;
257 	int i;
258 	unsigned char SHA1md[SHA_DIGEST_LENGTH];
259 
260 	/* display the hash of the subject as it would appear
261 	   in OCSP requests */
262 	if (BIO_printf(bp, "        Subject OCSP hash: ") <= 0)
263 		goto err;
264 	derlen = i2d_X509_NAME(x->cert_info->subject, NULL);
265 	if ((der = dertmp = malloc(derlen)) == NULL)
266 		goto err;
267 	i2d_X509_NAME(x->cert_info->subject, &dertmp);
268 
269 	if (!EVP_Digest(der, derlen, SHA1md, NULL, EVP_sha1(), NULL))
270 		goto err;
271 	for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
272 		if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
273 			goto err;
274 	}
275 	free (der);
276 	der = NULL;
277 
278 	/* display the hash of the public key as it would appear
279 	   in OCSP requests */
280 	if (BIO_printf(bp, "\n        Public key OCSP hash: ") <= 0)
281 		goto err;
282 
283 	if (!EVP_Digest(x->cert_info->key->public_key->data,
284 	    x->cert_info->key->public_key->length,
285 	    SHA1md, NULL, EVP_sha1(), NULL))
286 		goto err;
287 	for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
288 		if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
289 			goto err;
290 	}
291 	BIO_printf(bp, "\n");
292 
293 	return (1);
294 
295 err:
296 	free(der);
297 	return (0);
298 }
299 
300 int
301 X509_signature_dump(BIO *bp, const ASN1_STRING *sig, int indent)
302 {
303 	const unsigned char *s;
304 	int i, n;
305 
306 	n = sig->length;
307 	s = sig->data;
308 	for (i = 0; i < n; i++) {
309 		if ((i % 18) == 0) {
310 			if (BIO_write(bp, "\n", 1) <= 0)
311 				return 0;
312 			if (BIO_indent(bp, indent, indent) <= 0)
313 				return 0;
314 		}
315 		if (BIO_printf(bp, "%02x%s", s[i],
316 		    ((i + 1) == n) ? "" : ":") <= 0)
317 			return 0;
318 	}
319 	if (BIO_write(bp, "\n", 1) != 1)
320 		return 0;
321 
322 	return 1;
323 }
324 
325 int
326 X509_signature_print(BIO *bp, const X509_ALGOR *sigalg, const ASN1_STRING *sig)
327 {
328 	int sig_nid;
329 	if (BIO_puts(bp, "    Signature Algorithm: ") <= 0)
330 		return 0;
331 	if (i2a_ASN1_OBJECT(bp, sigalg->algorithm) <= 0)
332 		return 0;
333 
334 	sig_nid = OBJ_obj2nid(sigalg->algorithm);
335 	if (sig_nid != NID_undef) {
336 		int pkey_nid, dig_nid;
337 		const EVP_PKEY_ASN1_METHOD *ameth;
338 		if (OBJ_find_sigid_algs(sig_nid, &dig_nid, &pkey_nid)) {
339 			ameth = EVP_PKEY_asn1_find(NULL, pkey_nid);
340 			if (ameth && ameth->sig_print)
341 				return ameth->sig_print(bp, sigalg, sig, 9, 0);
342 		}
343 	}
344 	if (sig)
345 		return X509_signature_dump(bp, sig, 9);
346 	else if (BIO_puts(bp, "\n") <= 0)
347 		return 0;
348 	return 1;
349 }
350 
351 int
352 ASN1_STRING_print(BIO *bp, const ASN1_STRING *v)
353 {
354 	int i, n;
355 	char buf[80];
356 	const char *p;
357 
358 	if (v == NULL)
359 		return (0);
360 	n = 0;
361 	p = (const char *)v->data;
362 	for (i = 0; i < v->length; i++) {
363 		if ((p[i] > '~') || ((p[i] < ' ') &&
364 		    (p[i] != '\n') && (p[i] != '\r')))
365 			buf[n] = '.';
366 		else
367 			buf[n] = p[i];
368 		n++;
369 		if (n >= 80) {
370 			if (BIO_write(bp, buf, n) <= 0)
371 				return (0);
372 			n = 0;
373 		}
374 	}
375 	if (n > 0)
376 		if (BIO_write(bp, buf, n) <= 0)
377 			return (0);
378 	return (1);
379 }
380 
381 int
382 ASN1_TIME_print(BIO *bp, const ASN1_TIME *tm)
383 {
384 	if (tm->type == V_ASN1_UTCTIME)
385 		return ASN1_UTCTIME_print(bp, tm);
386 	if (tm->type == V_ASN1_GENERALIZEDTIME)
387 		return ASN1_GENERALIZEDTIME_print(bp, tm);
388 	BIO_write(bp, "Bad time value", 14);
389 	return (0);
390 }
391 
392 static const char *mon[12] = {
393 	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
394 	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
395 };
396 
397 int
398 ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
399 {
400 	char *v;
401 	int gmt = 0;
402 	int i;
403 	int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;
404 	char *f = "";
405 	int f_len = 0;
406 
407 	i = tm->length;
408 	v = (char *)tm->data;
409 
410 	if (i < 12)
411 		goto err;
412 	if (v[i-1] == 'Z')
413 		gmt = 1;
414 	for (i = 0; i < 12; i++)
415 		if ((v[i] > '9') || (v[i] < '0'))
416 			goto err;
417 	y = (v[0] - '0') * 1000 + (v[1] - '0') * 100 +
418 	    (v[2] - '0') * 10 + (v[3] - '0');
419 	M = (v[4] - '0') * 10 + (v[5] - '0');
420 	if ((M > 12) || (M < 1))
421 		goto err;
422 	d = (v[6] - '0') * 10 + (v[7] - '0');
423 	h = (v[8] - '0') * 10 + (v[9] - '0');
424 	m = (v[10] - '0') * 10 + (v[11] - '0');
425 	if (tm->length >= 14 &&
426 	    (v[12] >= '0') && (v[12] <= '9') &&
427 	    (v[13] >= '0') && (v[13] <= '9')) {
428 		s =  (v[12] - '0') * 10 + (v[13] - '0');
429 		/* Check for fractions of seconds. */
430 		if (tm->length >= 15 && v[14] == '.') {
431 			int l = tm->length;
432 			f = &v[14];	/* The decimal point. */
433 			f_len = 1;
434 			while (14 + f_len < l && f[f_len] >= '0' &&
435 			    f[f_len] <= '9')
436 				++f_len;
437 		}
438 	}
439 
440 	if (BIO_printf(bp, "%s %2d %02d:%02d:%02d%.*s %d%s",
441 	    mon[M - 1], d, h, m, s, f_len, f, y, (gmt) ? " GMT" : "") <= 0)
442 		return (0);
443 	else
444 		return (1);
445 
446 err:
447 	BIO_write(bp, "Bad time value", 14);
448 	return (0);
449 }
450 
451 int
452 ASN1_UTCTIME_print(BIO *bp, const ASN1_UTCTIME *tm)
453 {
454 	const char *v;
455 	int gmt = 0;
456 	int i;
457 	int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;
458 
459 	i = tm->length;
460 	v = (const char *)tm->data;
461 
462 	if (i < 10)
463 		goto err;
464 	if (v[i-1] == 'Z')
465 		gmt = 1;
466 	for (i = 0; i < 10; i++)
467 		if ((v[i] > '9') || (v[i] < '0'))
468 			goto err;
469 	y = (v[0] - '0') * 10 + (v[1] - '0');
470 	if (y < 50)
471 		y += 100;
472 	M = (v[2] - '0') * 10 + (v[3] - '0');
473 	if ((M > 12) || (M < 1))
474 		goto err;
475 	d = (v[4] - '0') * 10 + (v[5] - '0');
476 	h = (v[6] - '0') * 10 + (v[7] - '0');
477 	m = (v[8] - '0') * 10 + (v[9] - '0');
478 	if (tm->length >=12 &&
479 	    (v[10] >= '0') && (v[10] <= '9') &&
480 	    (v[11] >= '0') && (v[11] <= '9'))
481 		s = (v[10] - '0') * 10 + (v[11] - '0');
482 
483 	if (BIO_printf(bp, "%s %2d %02d:%02d:%02d %d%s",
484 	    mon[M - 1], d, h, m, s, y + 1900, (gmt) ? " GMT" : "") <= 0)
485 		return (0);
486 	else
487 		return (1);
488 
489 err:
490 	BIO_write(bp, "Bad time value", 14);
491 	return (0);
492 }
493 
494 int
495 X509_NAME_print(BIO *bp, const X509_NAME *name, int obase)
496 {
497 	char *s, *c, *b;
498 	int ret = 0, l, i;
499 
500 	l = 80 - 2 - obase;
501 
502 	b = X509_NAME_oneline(name, NULL, 0);
503 	if (b == NULL)
504 		return 0;
505 	if (*b == '\0') {
506 		free(b);
507 		return 1;
508 	}
509 	s = b + 1; /* skip the first slash */
510 
511 	c = s;
512 	for (;;) {
513 		if (((*s == '/') &&
514 		    ((s[1] >= 'A') && (s[1] <= 'Z') &&
515 		    ((s[2] == '=') || ((s[2] >= 'A') && (s[2] <= 'Z') &&
516 		    (s[3] == '='))))) || (*s == '\0')) {
517 			i = s - c;
518 			if (BIO_write(bp, c, i) != i)
519 				goto err;
520 			c = s + 1;	/* skip following slash */
521 			if (*s != '\0') {
522 				if (BIO_write(bp, ", ", 2) != 2)
523 					goto err;
524 			}
525 			l--;
526 		}
527 		if (*s == '\0')
528 			break;
529 		s++;
530 		l--;
531 	}
532 
533 	ret = 1;
534 	if (0) {
535 err:
536 		X509error(ERR_R_BUF_LIB);
537 	}
538 	free(b);
539 	return (ret);
540 }
541