xref: /openbsd/lib/libcrypto/asn1/t_x509.c (revision fc61954a) 
1 /* $OpenBSD: t_x509.c,v 1.26 2015/02/07 13:19:15 doug 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 		X509err(X509_F_X509_PRINT_EX_FP, 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 X509_ocspid_print (BIO *bp, X509 *x)
250 {
251 	unsigned char *der = NULL;
252 	unsigned char *dertmp;
253 	int derlen;
254 	int i;
255 	unsigned char SHA1md[SHA_DIGEST_LENGTH];
256 
257 	/* display the hash of the subject as it would appear
258 	   in OCSP requests */
259 	if (BIO_printf(bp, "        Subject OCSP hash: ") <= 0)
260 		goto err;
261 	derlen = i2d_X509_NAME(x->cert_info->subject, NULL);
262 	if ((der = dertmp = malloc(derlen)) == NULL)
263 		goto err;
264 	i2d_X509_NAME(x->cert_info->subject, &dertmp);
265 
266 	if (!EVP_Digest(der, derlen, SHA1md, NULL, EVP_sha1(), NULL))
267 		goto err;
268 	for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
269 		if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
270 			goto err;
271 	}
272 	free (der);
273 	der = NULL;
274 
275 	/* display the hash of the public key as it would appear
276 	   in OCSP requests */
277 	if (BIO_printf(bp, "\n        Public key OCSP hash: ") <= 0)
278 		goto err;
279 
280 	if (!EVP_Digest(x->cert_info->key->public_key->data,
281 	    x->cert_info->key->public_key->length,
282 	    SHA1md, NULL, EVP_sha1(), NULL))
283 		goto err;
284 	for (i = 0; i < SHA_DIGEST_LENGTH; i++) {
285 		if (BIO_printf(bp, "%02X", SHA1md[i]) <= 0)
286 			goto err;
287 	}
288 	BIO_printf(bp, "\n");
289 
290 	return (1);
291 
292 err:
293 	free(der);
294 	return (0);
295 }
296 
297 int
298 X509_signature_dump(BIO *bp, const ASN1_STRING *sig, int indent)
299 {
300 	const unsigned char *s;
301 	int i, n;
302 
303 	n = sig->length;
304 	s = sig->data;
305 	for (i = 0; i < n; i++) {
306 		if ((i % 18) == 0) {
307 			if (BIO_write(bp, "\n", 1) <= 0)
308 				return 0;
309 			if (BIO_indent(bp, indent, indent) <= 0)
310 				return 0;
311 		}
312 		if (BIO_printf(bp, "%02x%s", s[i],
313 		    ((i + 1) == n) ? "" : ":") <= 0)
314 			return 0;
315 	}
316 	if (BIO_write(bp, "\n", 1) != 1)
317 		return 0;
318 
319 	return 1;
320 }
321 
322 int
323 X509_signature_print(BIO *bp, X509_ALGOR *sigalg, ASN1_STRING *sig)
324 {
325 	int sig_nid;
326 	if (BIO_puts(bp, "    Signature Algorithm: ") <= 0)
327 		return 0;
328 	if (i2a_ASN1_OBJECT(bp, sigalg->algorithm) <= 0)
329 		return 0;
330 
331 	sig_nid = OBJ_obj2nid(sigalg->algorithm);
332 	if (sig_nid != NID_undef) {
333 		int pkey_nid, dig_nid;
334 		const EVP_PKEY_ASN1_METHOD *ameth;
335 		if (OBJ_find_sigid_algs(sig_nid, &dig_nid, &pkey_nid)) {
336 			ameth = EVP_PKEY_asn1_find(NULL, pkey_nid);
337 			if (ameth && ameth->sig_print)
338 				return ameth->sig_print(bp, sigalg, sig, 9, 0);
339 		}
340 	}
341 	if (sig)
342 		return X509_signature_dump(bp, sig, 9);
343 	else if (BIO_puts(bp, "\n") <= 0)
344 		return 0;
345 	return 1;
346 }
347 
348 int
349 ASN1_STRING_print(BIO *bp, const ASN1_STRING *v)
350 {
351 	int i, n;
352 	char buf[80];
353 	const char *p;
354 
355 	if (v == NULL)
356 		return (0);
357 	n = 0;
358 	p = (const char *)v->data;
359 	for (i = 0; i < v->length; i++) {
360 		if ((p[i] > '~') || ((p[i] < ' ') &&
361 		    (p[i] != '\n') && (p[i] != '\r')))
362 			buf[n] = '.';
363 		else
364 			buf[n] = p[i];
365 		n++;
366 		if (n >= 80) {
367 			if (BIO_write(bp, buf, n) <= 0)
368 				return (0);
369 			n = 0;
370 		}
371 	}
372 	if (n > 0)
373 		if (BIO_write(bp, buf, n) <= 0)
374 			return (0);
375 	return (1);
376 }
377 
378 int
379 ASN1_TIME_print(BIO *bp, const ASN1_TIME *tm)
380 {
381 	if (tm->type == V_ASN1_UTCTIME)
382 		return ASN1_UTCTIME_print(bp, tm);
383 	if (tm->type == V_ASN1_GENERALIZEDTIME)
384 		return ASN1_GENERALIZEDTIME_print(bp, tm);
385 	BIO_write(bp, "Bad time value", 14);
386 	return (0);
387 }
388 
389 static const char *mon[12] = {
390 	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
391 	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
392 };
393 
394 int
395 ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
396 {
397 	char *v;
398 	int gmt = 0;
399 	int i;
400 	int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;
401 	char *f = NULL;
402 	int f_len = 0;
403 
404 	i = tm->length;
405 	v = (char *)tm->data;
406 
407 	if (i < 12)
408 		goto err;
409 	if (v[i-1] == 'Z')
410 		gmt = 1;
411 	for (i = 0; i < 12; i++)
412 		if ((v[i] > '9') || (v[i] < '0'))
413 			goto err;
414 	y = (v[0] - '0') * 1000 + (v[1] - '0') * 100 +
415 	    (v[2] - '0') * 10 + (v[3] - '0');
416 	M = (v[4] - '0') * 10 + (v[5] - '0');
417 	if ((M > 12) || (M < 1))
418 		goto err;
419 	d = (v[6] - '0') * 10 + (v[7] - '0');
420 	h = (v[8] - '0') * 10 + (v[9] - '0');
421 	m = (v[10] - '0') * 10 + (v[11] - '0');
422 	if (tm->length >= 14 &&
423 	    (v[12] >= '0') && (v[12] <= '9') &&
424 	    (v[13] >= '0') && (v[13] <= '9')) {
425 		s =  (v[12] - '0') * 10 + (v[13] - '0');
426 		/* Check for fractions of seconds. */
427 		if (tm->length >= 15 && v[14] == '.') {
428 			int l = tm->length;
429 			f = &v[14];	/* The decimal point. */
430 			f_len = 1;
431 			while (14 + f_len < l && f[f_len] >= '0' &&
432 			    f[f_len] <= '9')
433 				++f_len;
434 		}
435 	}
436 
437 	if (BIO_printf(bp, "%s %2d %02d:%02d:%02d%.*s %d%s",
438 	    mon[M - 1], d, h, m, s, f_len, f, y, (gmt) ? " GMT" : "") <= 0)
439 		return (0);
440 	else
441 		return (1);
442 
443 err:
444 	BIO_write(bp, "Bad time value", 14);
445 	return (0);
446 }
447 
448 int
449 ASN1_UTCTIME_print(BIO *bp, const ASN1_UTCTIME *tm)
450 {
451 	const char *v;
452 	int gmt = 0;
453 	int i;
454 	int y = 0, M = 0, d = 0, h = 0, m = 0, s = 0;
455 
456 	i = tm->length;
457 	v = (const char *)tm->data;
458 
459 	if (i < 10)
460 		goto err;
461 	if (v[i-1] == 'Z')
462 		gmt = 1;
463 	for (i = 0; i < 10; i++)
464 		if ((v[i] > '9') || (v[i] < '0'))
465 			goto err;
466 	y = (v[0] - '0') * 10 + (v[1] - '0');
467 	if (y < 50)
468 		y += 100;
469 	M = (v[2] - '0') * 10 + (v[3] - '0');
470 	if ((M > 12) || (M < 1))
471 		goto err;
472 	d = (v[4] - '0') * 10 + (v[5] - '0');
473 	h = (v[6] - '0') * 10 + (v[7] - '0');
474 	m = (v[8] - '0') * 10 + (v[9] - '0');
475 	if (tm->length >=12 &&
476 	    (v[10] >= '0') && (v[10] <= '9') &&
477 	    (v[11] >= '0') && (v[11] <= '9'))
478 		s = (v[10] - '0') * 10 + (v[11] - '0');
479 
480 	if (BIO_printf(bp, "%s %2d %02d:%02d:%02d %d%s",
481 	    mon[M - 1], d, h, m, s, y + 1900, (gmt) ? " GMT" : "") <= 0)
482 		return (0);
483 	else
484 		return (1);
485 
486 err:
487 	BIO_write(bp, "Bad time value", 14);
488 	return (0);
489 }
490 
491 int
492 X509_NAME_print(BIO *bp, X509_NAME *name, int obase)
493 {
494 	char *s, *c, *b;
495 	int ret = 0, l, i;
496 
497 	l = 80 - 2 - obase;
498 
499 	b = X509_NAME_oneline(name, NULL, 0);
500 	if (b == NULL)
501 		return 0;
502 	if (*b == '\0') {
503 		free(b);
504 		return 1;
505 	}
506 	s = b + 1; /* skip the first slash */
507 
508 	c = s;
509 	for (;;) {
510 		if (((*s == '/') &&
511 		    ((s[1] >= 'A') && (s[1] <= 'Z') &&
512 		    ((s[2] == '=') || ((s[2] >= 'A') && (s[2] <= 'Z') &&
513 		    (s[3] == '='))))) || (*s == '\0')) {
514 			i = s - c;
515 			if (BIO_write(bp, c, i) != i)
516 				goto err;
517 			c = s + 1;	/* skip following slash */
518 			if (*s != '\0') {
519 				if (BIO_write(bp, ", ", 2) != 2)
520 					goto err;
521 			}
522 			l--;
523 		}
524 		if (*s == '\0')
525 			break;
526 		s++;
527 		l--;
528 	}
529 
530 	ret = 1;
531 	if (0) {
532 err:
533 		X509err(X509_F_X509_NAME_PRINT, ERR_R_BUF_LIB);
534 	}
535 	free(b);
536 	return (ret);
537 }
538