2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999-2003 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
58 /* X509 v3 extension utilities */
64 #include <openssl/conf.h>
65 #include <openssl/x509v3.h>
66 #include <openssl/bn.h>
68 static char *strip_spaces(char *name);
69 static int sk_strcmp(const char * const *a, const char * const *b);
70 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens);
71 static void str_free(OPENSSL_STRING str);
72 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email);
74 static int ipv4_from_asc(unsigned char *v4, const char *in);
75 static int ipv6_from_asc(unsigned char *v6, const char *in);
76 static int ipv6_cb(const char *elem, int len, void *usr);
77 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
79 /* Add a CONF_VALUE name value pair to stack */
81 int X509V3_add_value(const char *name, const char *value,
82 STACK_OF(CONF_VALUE) **extlist)
84 CONF_VALUE *vtmp = NULL;
85 char *tname = NULL, *tvalue = NULL;
86 if(name && !(tname = BUF_strdup(name))) goto err;
87 if(value && !(tvalue = BUF_strdup(value))) goto err;
88 if(!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) goto err;
89 if(!*extlist && !(*extlist = sk_CONF_VALUE_new_null())) goto err;
93 if(!sk_CONF_VALUE_push(*extlist, vtmp)) goto err;
96 X509V3err(X509V3_F_X509V3_ADD_VALUE,ERR_R_MALLOC_FAILURE);
97 if(vtmp) OPENSSL_free(vtmp);
98 if(tname) OPENSSL_free(tname);
99 if(tvalue) OPENSSL_free(tvalue);
103 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
104 STACK_OF(CONF_VALUE) **extlist)
106 return X509V3_add_value(name,(const char *)value,extlist);
109 /* Free function for STACK_OF(CONF_VALUE) */
111 void X509V3_conf_free(CONF_VALUE *conf)
114 if(conf->name) OPENSSL_free(conf->name);
115 if(conf->value) OPENSSL_free(conf->value);
116 if(conf->section) OPENSSL_free(conf->section);
120 int X509V3_add_value_bool(const char *name, int asn1_bool,
121 STACK_OF(CONF_VALUE) **extlist)
123 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
124 return X509V3_add_value(name, "FALSE", extlist);
127 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
128 STACK_OF(CONF_VALUE) **extlist)
130 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
135 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
137 BIGNUM *bntmp = NULL;
140 if(!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
141 !(strtmp = BN_bn2dec(bntmp)) )
142 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
147 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
149 BIGNUM *bntmp = NULL;
152 if(!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
153 !(strtmp = BN_bn2dec(bntmp)) )
154 X509V3err(X509V3_F_I2S_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
159 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
166 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE);
170 if (value[0] == '-') {
175 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
180 if (ishex) ret = BN_hex2bn(&bn, value);
181 else ret = BN_dec2bn(&bn, value);
183 if (!ret || value[ret]) {
185 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR);
189 if (isneg && BN_is_zero(bn)) isneg = 0;
191 aint = BN_to_ASN1_INTEGER(bn, NULL);
194 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
197 if (isneg) aint->type |= V_ASN1_NEG;
201 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
202 STACK_OF(CONF_VALUE) **extlist)
207 if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0;
208 ret = X509V3_add_value(name, strtmp, extlist);
209 OPENSSL_free(strtmp);
213 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
216 if(!(btmp = value->value)) goto err;
217 if(!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
218 || !strcmp(btmp, "Y") || !strcmp(btmp, "y")
219 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
222 } else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
223 || !strcmp(btmp, "N") || !strcmp(btmp, "n")
224 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
229 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,X509V3_R_INVALID_BOOLEAN_STRING);
230 X509V3_conf_err(value);
234 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
237 if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
238 X509V3_conf_err(value);
250 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
254 STACK_OF(CONF_VALUE) *values = NULL;
257 /* We are going to modify the line so copy it first */
258 linebuf = BUF_strdup(line);
261 /* Go through all characters */
262 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
269 ntmp = strip_spaces(q);
271 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
275 } else if(c == ',') {
277 ntmp = strip_spaces(q);
280 printf("%s\n", ntmp);
283 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
286 X509V3_add_value(ntmp, NULL, &values);
294 vtmp = strip_spaces(q);
296 printf("%s\n", ntmp);
299 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
302 X509V3_add_value(ntmp, vtmp, &values);
310 if(state == HDR_VALUE) {
311 vtmp = strip_spaces(q);
313 printf("%s=%s\n", ntmp, vtmp);
316 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
319 X509V3_add_value(ntmp, vtmp, &values);
321 ntmp = strip_spaces(q);
323 printf("%s\n", ntmp);
326 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
329 X509V3_add_value(ntmp, NULL, &values);
331 OPENSSL_free(linebuf);
335 OPENSSL_free(linebuf);
336 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
341 /* Delete leading and trailing spaces from a string */
342 static char *strip_spaces(char *name)
345 /* Skip over leading spaces */
347 while(*p && isspace((unsigned char)*p)) p++;
349 q = p + strlen(p) - 1;
350 while((q != p) && isspace((unsigned char)*q)) q--;
356 /* hex string utilities */
358 /* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
360 * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
363 char *hex_to_string(const unsigned char *buffer, long len)
366 const unsigned char *p;
368 const static char hexdig[] = "0123456789ABCDEF";
369 if(!buffer || !len) return NULL;
370 if(!(tmp = OPENSSL_malloc(len * 3 + 1))) {
371 X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
375 for(i = 0, p = buffer; i < len; i++,p++) {
376 *q++ = hexdig[(*p >> 4) & 0xf];
377 *q++ = hexdig[*p & 0xf];
381 #ifdef CHARSET_EBCDIC
382 ebcdic2ascii(tmp, tmp, q - tmp - 1);
388 /* Give a string of hex digits convert to
392 unsigned char *string_to_hex(const char *str, long *len)
394 unsigned char *hexbuf, *q;
395 unsigned char ch, cl, *p;
397 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
400 if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err;
401 for(p = (unsigned char *)str, q = hexbuf; *p;) {
403 #ifdef CHARSET_EBCDIC
404 ch = os_toebcdic[ch];
406 if(ch == ':') continue;
408 #ifdef CHARSET_EBCDIC
409 cl = os_toebcdic[cl];
412 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
413 OPENSSL_free(hexbuf);
416 if(isupper(ch)) ch = tolower(ch);
417 if(isupper(cl)) cl = tolower(cl);
419 if((ch >= '0') && (ch <= '9')) ch -= '0';
420 else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10;
423 if((cl >= '0') && (cl <= '9')) cl -= '0';
424 else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10;
427 *q++ = (ch << 4) | cl;
430 if(len) *len = q - hexbuf;
435 if(hexbuf) OPENSSL_free(hexbuf);
436 X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
440 OPENSSL_free(hexbuf);
441 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
446 /* V2I name comparison function: returns zero if 'name' matches
450 int name_cmp(const char *name, const char *cmp)
455 if((ret = strncmp(name, cmp, len))) return ret;
457 if(!c || (c=='.')) return 0;
461 static int sk_strcmp(const char * const *a, const char * const *b)
463 return strcmp(*a, *b);
466 STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
469 STACK_OF(OPENSSL_STRING) *ret;
471 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
472 ret = get_email(X509_get_subject_name(x), gens);
473 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
477 STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
479 AUTHORITY_INFO_ACCESS *info;
480 STACK_OF(OPENSSL_STRING) *ret = NULL;
483 info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
486 for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++)
488 ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
489 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP)
491 if (ad->location->type == GEN_URI)
493 if (!append_ia5(&ret, ad->location->d.uniformResourceIdentifier))
498 AUTHORITY_INFO_ACCESS_free(info);
502 STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
505 STACK_OF(X509_EXTENSION) *exts;
506 STACK_OF(OPENSSL_STRING) *ret;
508 exts = X509_REQ_get_extensions(x);
509 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
510 ret = get_email(X509_REQ_get_subject_name(x), gens);
511 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
512 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
517 static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens)
519 STACK_OF(OPENSSL_STRING) *ret = NULL;
521 ASN1_IA5STRING *email;
524 /* Now add any email address(es) to STACK */
526 /* First supplied X509_NAME */
527 while((i = X509_NAME_get_index_by_NID(name,
528 NID_pkcs9_emailAddress, i)) >= 0) {
529 ne = X509_NAME_get_entry(name, i);
530 email = X509_NAME_ENTRY_get_data(ne);
531 if(!append_ia5(&ret, email)) return NULL;
533 for(i = 0; i < sk_GENERAL_NAME_num(gens); i++)
535 gen = sk_GENERAL_NAME_value(gens, i);
536 if(gen->type != GEN_EMAIL) continue;
537 if(!append_ia5(&ret, gen->d.ia5)) return NULL;
542 static void str_free(OPENSSL_STRING str)
547 static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
550 /* First some sanity checks */
551 if(email->type != V_ASN1_IA5STRING) return 1;
552 if(!email->data || !email->length) return 1;
553 if(!*sk) *sk = sk_OPENSSL_STRING_new(sk_strcmp);
555 /* Don't add duplicates */
556 if(sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1) return 1;
557 emtmp = BUF_strdup((char *)email->data);
558 if(!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
559 X509_email_free(*sk);
566 void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
568 sk_OPENSSL_STRING_pop_free(sk, str_free);
571 /* Convert IP addresses both IPv4 and IPv6 into an
572 * OCTET STRING compatible with RFC3280.
575 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
577 unsigned char ipout[16];
578 ASN1_OCTET_STRING *ret;
581 /* If string contains a ':' assume IPv6 */
583 iplen = a2i_ipadd(ipout, ipasc);
588 ret = ASN1_OCTET_STRING_new();
591 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen))
593 ASN1_OCTET_STRING_free(ret);
599 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
601 ASN1_OCTET_STRING *ret = NULL;
602 unsigned char ipout[32];
603 char *iptmp = NULL, *p;
605 p = strchr(ipasc,'/');
608 iptmp = BUF_strdup(ipasc);
611 p = iptmp + (p - ipasc);
614 iplen1 = a2i_ipadd(ipout, iptmp);
619 iplen2 = a2i_ipadd(ipout + iplen1, p);
624 if (!iplen2 || (iplen1 != iplen2))
627 ret = ASN1_OCTET_STRING_new();
630 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
639 ASN1_OCTET_STRING_free(ret);
644 int a2i_ipadd(unsigned char *ipout, const char *ipasc)
646 /* If string contains a ':' assume IPv6 */
648 if (strchr(ipasc, ':'))
650 if (!ipv6_from_asc(ipout, ipasc))
656 if (!ipv4_from_asc(ipout, ipasc))
662 static int ipv4_from_asc(unsigned char *v4, const char *in)
665 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
667 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
668 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
678 /* Temporary store for IPV6 output */
679 unsigned char tmp[16];
680 /* Total number of bytes in tmp */
682 /* The position of a zero (corresponding to '::') */
684 /* Number of zeroes */
689 static int ipv6_from_asc(unsigned char *v6, const char *in)
693 v6stat.zero_pos = -1;
695 /* Treat the IPv6 representation as a list of values
696 * separated by ':'. The presence of a '::' will parse
697 * as one, two or three zero length elements.
699 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
702 /* Now for some sanity checks */
704 if (v6stat.zero_pos == -1)
706 /* If no '::' must have exactly 16 bytes */
707 if (v6stat.total != 16)
712 /* If '::' must have less than 16 bytes */
713 if (v6stat.total == 16)
715 /* More than three zeroes is an error */
716 if (v6stat.zero_cnt > 3)
718 /* Can only have three zeroes if nothing else present */
719 else if (v6stat.zero_cnt == 3)
721 if (v6stat.total > 0)
724 /* Can only have two zeroes if at start or end */
725 else if (v6stat.zero_cnt == 2)
727 if ((v6stat.zero_pos != 0)
728 && (v6stat.zero_pos != v6stat.total))
732 /* Can only have one zero if *not* start or end */
734 if ((v6stat.zero_pos == 0)
735 || (v6stat.zero_pos == v6stat.total))
742 if (v6stat.zero_pos >= 0)
744 /* Copy initial part */
745 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
747 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
748 /* Copy final part */
749 if (v6stat.total != v6stat.zero_pos)
750 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
751 v6stat.tmp + v6stat.zero_pos,
752 v6stat.total - v6stat.zero_pos);
755 memcpy(v6, v6stat.tmp, 16);
760 static int ipv6_cb(const char *elem, int len, void *usr)
763 /* Error if 16 bytes written */
768 /* Zero length element, corresponds to '::' */
769 if (s->zero_pos == -1)
770 s->zero_pos = s->total;
771 /* If we've already got a :: its an error */
772 else if (s->zero_pos != s->total)
778 /* If more than 4 characters could be final a.b.c.d form */
781 /* Need at least 4 bytes left */
784 /* Must be end of string */
787 if (!ipv4_from_asc(s->tmp + s->total, elem))
793 if (!ipv6_hex(s->tmp + s->total, elem, len))
801 /* Convert a string of up to 4 hex digits into the corresponding
805 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
808 unsigned int num = 0;
815 if ((c >= '0') && (c <= '9'))
817 else if ((c >= 'A') && (c <= 'F'))
819 else if ((c >= 'a') && (c <= 'f'))
830 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk,
831 unsigned long chtype)
839 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++)
841 v=sk_CONF_VALUE_value(dn_sk,i);
843 /* Skip past any leading X. X: X, etc to allow for
846 for(p = type; *p ; p++)
847 #ifndef CHARSET_EBCDIC
848 if ((*p == ':') || (*p == ',') || (*p == '.'))
850 if ((*p == os_toascii[':']) || (*p == os_toascii[',']) || (*p == os_toascii['.']))
857 #ifndef CHARSET_EBCDIC
860 if (*type == os_toascii['+'])
868 if (!X509_NAME_add_entry_by_txt(nm,type, chtype,
869 (unsigned char *) v->value,-1,-1,mval))