xref: /openbsd/lib/libcrypto/asn1/t_x509.c (revision 274d7c50) 
1 /* $OpenBSD: t_x509.c,v 1.31 2018/05/18 18:23:24 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 		if (bs->length <= (int)sizeof(long)) {
149 			l = ASN1_INTEGER_get(bs);
150 			if (bs->type == V_ASN1_NEG_INTEGER) {
151 				l = -l;
152 				neg = "-";
153 			} else
154 				neg = "";
155 			if (BIO_printf(bp, " %s%lu (%s0x%lx)\n",
156 			    neg, l, neg, l) <= 0)
157 				goto err;
158 		} else {
159 			neg = (bs->type == V_ASN1_NEG_INTEGER) ?
160 			    " (Negative)" : "";
161 			if (BIO_printf(bp, "\n%12s%s", "", neg) <= 0)
162 				goto err;
163 			for (i = 0; i < bs->length; i++) {
164 				if (BIO_printf(bp, "%02x%c", bs->data[i],
165 				    ((i + 1 == bs->length) ? '\n' : ':')) <= 0)
166 					goto err;
167 			}
168 		}
169 
170 	}
171 
172 	if (!(cflag & X509_FLAG_NO_SIGNAME)) {
173 		if (X509_signature_print(bp, x->sig_alg, NULL) <= 0)
174 			goto err;
175 	}
176 
177 	if (!(cflag & X509_FLAG_NO_ISSUER)) {
178 		if (BIO_printf(bp, "        Issuer:%c", mlch) <= 0)
179 			goto err;
180 		if (X509_NAME_print_ex(bp, X509_get_issuer_name(x),
181 		    nmindent, nmflags) < 0)
182 			goto err;
183 		if (BIO_write(bp, "\n", 1) <= 0)
184 			goto err;
185 	}
186 	if (!(cflag & X509_FLAG_NO_VALIDITY)) {
187 		if (BIO_write(bp, "        Validity\n", 17) <= 0)
188 			goto err;
189 		if (BIO_write(bp, "            Not Before: ", 24) <= 0)
190 			goto err;
191 		if (!ASN1_TIME_print(bp, X509_get_notBefore(x)))
192 			goto err;
193 		if (BIO_write(bp, "\n            Not After : ", 25) <= 0)
194 			goto err;
195 		if (!ASN1_TIME_print(bp, X509_get_notAfter(x)))
196 			goto err;
197 		if (BIO_write(bp, "\n", 1) <= 0)
198 			goto err;
199 	}
200 	if (!(cflag & X509_FLAG_NO_SUBJECT)) {
201 		if (BIO_printf(bp, "        Subject:%c", mlch) <= 0)
202 			goto err;
203 		if (X509_NAME_print_ex(bp, X509_get_subject_name(x),
204 		    nmindent, nmflags) < 0)
205 			goto err;
206 		if (BIO_write(bp, "\n", 1) <= 0)
207 			goto err;
208 	}
209 	if (!(cflag & X509_FLAG_NO_PUBKEY)) {
210 		if (BIO_write(bp, "        Subject Public Key Info:\n",
211 		    33) <= 0)
212 			goto err;
213 		if (BIO_printf(bp, "%12sPublic Key Algorithm: ", "") <= 0)
214 			goto err;
215 		if (i2a_ASN1_OBJECT(bp, ci->key->algor->algorithm) <= 0)
216 			goto err;
217 		if (BIO_puts(bp, "\n") <= 0)
218 			goto err;
219 
220 		pkey = X509_get_pubkey(x);
221 		if (pkey == NULL) {
222 			BIO_printf(bp, "%12sUnable to load Public Key\n", "");
223 			ERR_print_errors(bp);
224 		} else {
225 			EVP_PKEY_print_public(bp, pkey, 16, NULL);
226 			EVP_PKEY_free(pkey);
227 		}
228 	}
229 
230 	if (!(cflag & X509_FLAG_NO_EXTENSIONS))
231 		X509V3_extensions_print(bp, "X509v3 extensions",
232 		    ci->extensions, cflag, 8);
233 
234 	if (!(cflag & X509_FLAG_NO_SIGDUMP)) {
235 		if (X509_signature_print(bp, x->sig_alg, x->signature) <= 0)
236 			goto err;
237 	}
238 	if (!(cflag & X509_FLAG_NO_AUX)) {
239 		if (!X509_CERT_AUX_print(bp, x->aux, 0))
240 			goto err;
241 	}
242 	ret = 1;
243 
244 err:
245 	free(m);
246 	return (ret);
247 }
248 
249 int
250 X509_ocspid_print(BIO *bp, X509 *x)
251 {
252 	unsigned char *der = NULL;
253 	unsigned char *dertmp;
254 	int derlen;
255 	int i;
256 	unsigned char SHA1md[SHA_DIGEST_LENGTH];
257 
258 	/* display the hash of the subject as it would appear
259 	   in OCSP requests */
260 	if (BIO_printf(bp, "        Subject OCSP hash: ") <= 0)
261 		goto err;
262 	derlen = i2d_X509_NAME(x->cert_info->subject, NULL);
263 	if ((der = dertmp = malloc(derlen)) == NULL)
264 		goto err;
265 	i2d_X509_NAME(x->cert_info->subject, &dertmp);
266 
267 	if (!EVP_Digest(der, derlen, SHA1md, NULL, EVP_sha1(), NULL))
268 		goto err;
269 	for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
270 		if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
271 			goto err;
272 	}
273 	free (der);
274 	der = NULL;
275 
276 	/* display the hash of the public key as it would appear
277 	   in OCSP requests */
278 	if (BIO_printf(bp, "\n        Public key OCSP hash: ") <= 0)
279 		goto err;
280 
281 	if (!EVP_Digest(x->cert_info->key->public_key->data,
282 	    x->cert_info->key->public_key->length,
283 	    SHA1md, NULL, EVP_sha1(), NULL))
284 		goto err;
285 	for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
286 		if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
287 			goto err;
288 	}
289 	BIO_printf(bp, "\n");
290 
291 	return (1);
292 
293 err:
294 	free(der);
295 	return (0);
296 }
297 
298 int
299 X509_signature_dump(BIO *bp, const ASN1_STRING *sig, int indent)
300 {
301 	const unsigned char *s;
302 	int i, n;
303 
304 	n = sig->length;
305 	s = sig->data;
306 	for (i = 0; i < n; i++) {
307 		if ((i % 18) == 0) {
308 			if (BIO_write(bp, "\n", 1) <= 0)
309 				return 0;
310 			if (BIO_indent(bp, indent, indent) <= 0)
311 				return 0;
312 		}
313 		if (BIO_printf(bp, "%02x%s", s[i],
314 		    ((i + 1) == n) ? "" : ":") <= 0)
315 			return 0;
316 	}
317 	if (BIO_write(bp, "\n", 1) != 1)
318 		return 0;
319 
320 	return 1;
321 }
322 
323 int
324 X509_signature_print(BIO *bp, const X509_ALGOR *sigalg, const ASN1_STRING *sig)
325 {
326 	int sig_nid;
327 	if (BIO_puts(bp, "    Signature Algorithm: ") <= 0)
328 		return 0;
329 	if (i2a_ASN1_OBJECT(bp, sigalg->algorithm) <= 0)
330 		return 0;
331 
332 	sig_nid = OBJ_obj2nid(sigalg->algorithm);
333 	if (sig_nid != NID_undef) {
334 		int pkey_nid, dig_nid;
335 		const EVP_PKEY_ASN1_METHOD *ameth;
336 		if (OBJ_find_sigid_algs(sig_nid, &dig_nid, &pkey_nid)) {
337 			ameth = EVP_PKEY_asn1_find(NULL, pkey_nid);
338 			if (ameth && ameth->sig_print)
339 				return ameth->sig_print(bp, sigalg, sig, 9, 0);
340 		}
341 	}
342 	if (sig)
343 		return X509_signature_dump(bp, sig, 9);
344 	else if (BIO_puts(bp, "\n") <= 0)
345 		return 0;
346 	return 1;
347 }
348 
349 int
350 ASN1_STRING_print(BIO *bp, const ASN1_STRING *v)
351 {
352 	int i, n;
353 	char buf[80];
354 	const char *p;
355 
356 	if (v == NULL)
357 		return (0);
358 	n = 0;
359 	p = (const char *)v->data;
360 	for (i = 0; i < v->length; i++) {
361 		if ((p[i] > '~') || ((p[i] < ' ') &&
362 		    (p[i] != '\n') && (p[i] != '\r')))
363 			buf[n] = '.';
364 		else
365 			buf[n] = p[i];
366 		n++;
367 		if (n >= 80) {
368 			if (BIO_write(bp, buf, n) <= 0)
369 				return (0);
370 			n = 0;
371 		}
372 	}
373 	if (n > 0)
374 		if (BIO_write(bp, buf, n) <= 0)
375 			return (0);
376 	return (1);
377 }
378 
379 int
380 ASN1_TIME_print(BIO *bp, const ASN1_TIME *tm)
381 {
382 	if (tm->type == V_ASN1_UTCTIME)
383 		return ASN1_UTCTIME_print(bp, tm);
384 	if (tm->type == V_ASN1_GENERALIZEDTIME)
385 		return ASN1_GENERALIZEDTIME_print(bp, tm);
386 	BIO_write(bp, "Bad time value", 14);
387 	return (0);
388 }
389 
390 static const char *mon[12] = {
391 	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
392 	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
393 };
394 
395 int
396 ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
397 {
398 	char *v;
399 	int gmt = 0;
400 	int i;
401 	int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;
402 	char *f = "";
403 	int f_len = 0;
404 
405 	i = tm->length;
406 	v = (char *)tm->data;
407 
408 	if (i < 12)
409 		goto err;
410 	if (v[i-1] == 'Z')
411 		gmt = 1;
412 	for (i = 0; i < 12; i++)
413 		if ((v[i] > '9') || (v[i] < '0'))
414 			goto err;
415 	y = (v[0] - '0') * 1000 + (v[1] - '0') * 100 +
416 	    (v[2] - '0') * 10 + (v[3] - '0');
417 	M = (v[4] - '0') * 10 + (v[5] - '0');
418 	if ((M > 12) || (M < 1))
419 		goto err;
420 	d = (v[6] - '0') * 10 + (v[7] - '0');
421 	h = (v[8] - '0') * 10 + (v[9] - '0');
422 	m = (v[10] - '0') * 10 + (v[11] - '0');
423 	if (tm->length >= 14 &&
424 	    (v[12] >= '0') && (v[12] <= '9') &&
425 	    (v[13] >= '0') && (v[13] <= '9')) {
426 		s =  (v[12] - '0') * 10 + (v[13] - '0');
427 		/* Check for fractions of seconds. */
428 		if (tm->length >= 15 && v[14] == '.') {
429 			int l = tm->length;
430 			f = &v[14];	/* The decimal point. */
431 			f_len = 1;
432 			while (14 + f_len < l && f[f_len] >= '0' &&
433 			    f[f_len] <= '9')
434 				++f_len;
435 		}
436 	}
437 
438 	if (BIO_printf(bp, "%s %2d %02d:%02d:%02d%.*s %d%s",
439 	    mon[M - 1], d, h, m, s, f_len, f, y, (gmt) ? " GMT" : "") <= 0)
440 		return (0);
441 	else
442 		return (1);
443 
444 err:
445 	BIO_write(bp, "Bad time value", 14);
446 	return (0);
447 }
448 
449 int
450 ASN1_UTCTIME_print(BIO *bp, const ASN1_UTCTIME *tm)
451 {
452 	const char *v;
453 	int gmt = 0;
454 	int i;
455 	int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;
456 
457 	i = tm->length;
458 	v = (const char *)tm->data;
459 
460 	if (i < 10)
461 		goto err;
462 	if (v[i-1] == 'Z')
463 		gmt = 1;
464 	for (i = 0; i < 10; i++)
465 		if ((v[i] > '9') || (v[i] < '0'))
466 			goto err;
467 	y = (v[0] - '0') * 10 + (v[1] - '0');
468 	if (y < 50)
469 		y += 100;
470 	M = (v[2] - '0') * 10 + (v[3] - '0');
471 	if ((M > 12) || (M < 1))
472 		goto err;
473 	d = (v[4] - '0') * 10 + (v[5] - '0');
474 	h = (v[6] - '0') * 10 + (v[7] - '0');
475 	m = (v[8] - '0') * 10 + (v[9] - '0');
476 	if (tm->length >=12 &&
477 	    (v[10] >= '0') && (v[10] <= '9') &&
478 	    (v[11] >= '0') && (v[11] <= '9'))
479 		s = (v[10] - '0') * 10 + (v[11] - '0');
480 
481 	if (BIO_printf(bp, "%s %2d %02d:%02d:%02d %d%s",
482 	    mon[M - 1], d, h, m, s, y + 1900, (gmt) ? " GMT" : "") <= 0)
483 		return (0);
484 	else
485 		return (1);
486 
487 err:
488 	BIO_write(bp, "Bad time value", 14);
489 	return (0);
490 }
491 
492 int
493 X509_NAME_print(BIO *bp, const X509_NAME *name, int obase)
494 {
495 	char *s, *c, *b;
496 	int ret = 0, l, i;
497 
498 	l = 80 - 2 - obase;
499 
500 	b = X509_NAME_oneline(name, NULL, 0);
501 	if (b == NULL)
502 		return 0;
503 	if (*b == '\0') {
504 		free(b);
505 		return 1;
506 	}
507 	s = b + 1; /* skip the first slash */
508 
509 	c = s;
510 	for (;;) {
511 		if (((*s == '/') &&
512 		    ((s[1] >= 'A') && (s[1] <= 'Z') &&
513 		    ((s[2] == '=') || ((s[2] >= 'A') && (s[2] <= 'Z') &&
514 		    (s[3] == '='))))) || (*s == '\0')) {
515 			i = s - c;
516 			if (BIO_write(bp, c, i) != i)
517 				goto err;
518 			c = s + 1;	/* skip following slash */
519 			if (*s != '\0') {
520 				if (BIO_write(bp, ", ", 2) != 2)
521 					goto err;
522 			}
523 			l--;
524 		}
525 		if (*s == '\0')
526 			break;
527 		s++;
528 		l--;
529 	}
530 
531 	ret = 1;
532 	if (0) {
533 err:
534 		X509error(ERR_R_BUF_LIB);
535 	}
536 	free(b);
537 	return (ret);
538 }
539