2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 *get_email(X509_NAME *name, GENERAL_NAMES *gens);
71 static void str_free(void *str);
72 static int append_ia5(STACK **sk, ASN1_IA5STRING *email);
74 static int a2i_ipadd(unsigned char *ipout, const char *ipasc);
75 static int ipv4_from_asc(unsigned char *v4, const char *in);
76 static int ipv6_from_asc(unsigned char *v6, const char *in);
77 static int ipv6_cb(const char *elem, int len, void *usr);
78 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
80 /* Add a CONF_VALUE name value pair to stack */
82 int X509V3_add_value(const char *name, const char *value,
83 STACK_OF(CONF_VALUE) **extlist)
85 CONF_VALUE *vtmp = NULL;
86 char *tname = NULL, *tvalue = NULL;
87 if(name && !(tname = BUF_strdup(name))) goto err;
88 if(value && !(tvalue = BUF_strdup(value))) goto err;;
89 if(!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) goto err;
90 if(!*extlist && !(*extlist = sk_CONF_VALUE_new_null())) goto err;
94 if(!sk_CONF_VALUE_push(*extlist, vtmp)) goto err;
97 X509V3err(X509V3_F_X509V3_ADD_VALUE,ERR_R_MALLOC_FAILURE);
98 if(vtmp) OPENSSL_free(vtmp);
99 if(tname) OPENSSL_free(tname);
100 if(tvalue) OPENSSL_free(tvalue);
104 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
105 STACK_OF(CONF_VALUE) **extlist)
107 return X509V3_add_value(name,(const char *)value,extlist);
110 /* Free function for STACK_OF(CONF_VALUE) */
112 void X509V3_conf_free(CONF_VALUE *conf)
115 if(conf->name) OPENSSL_free(conf->name);
116 if(conf->value) OPENSSL_free(conf->value);
117 if(conf->section) OPENSSL_free(conf->section);
121 int X509V3_add_value_bool(const char *name, int asn1_bool,
122 STACK_OF(CONF_VALUE) **extlist)
124 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
125 return X509V3_add_value(name, "FALSE", extlist);
128 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
129 STACK_OF(CONF_VALUE) **extlist)
131 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
136 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
138 BIGNUM *bntmp = NULL;
141 if(!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
142 !(strtmp = BN_bn2dec(bntmp)) )
143 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
148 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
150 BIGNUM *bntmp = NULL;
153 if(!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
154 !(strtmp = BN_bn2dec(bntmp)) )
155 X509V3err(X509V3_F_I2S_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
160 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
167 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE);
171 if (value[0] == '-') {
176 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
181 if (ishex) ret = BN_hex2bn(&bn, value);
182 else ret = BN_dec2bn(&bn, value);
184 if (!ret || value[ret]) {
186 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR);
190 if (isneg && BN_is_zero(bn)) isneg = 0;
192 aint = BN_to_ASN1_INTEGER(bn, NULL);
195 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
198 if (isneg) aint->type |= V_ASN1_NEG;
202 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
203 STACK_OF(CONF_VALUE) **extlist)
208 if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0;
209 ret = X509V3_add_value(name, strtmp, extlist);
210 OPENSSL_free(strtmp);
214 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
217 if(!(btmp = value->value)) goto err;
218 if(!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
219 || !strcmp(btmp, "Y") || !strcmp(btmp, "y")
220 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
223 } else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
224 || !strcmp(btmp, "N") || !strcmp(btmp, "n")
225 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
230 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,X509V3_R_INVALID_BOOLEAN_STRING);
231 X509V3_conf_err(value);
235 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
238 if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
239 X509V3_conf_err(value);
251 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
255 STACK_OF(CONF_VALUE) *values = NULL;
258 /* We are going to modify the line so copy it first */
259 linebuf = BUF_strdup(line);
262 /* Go through all characters */
263 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
270 ntmp = strip_spaces(q);
272 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
276 } else if(c == ',') {
278 ntmp = strip_spaces(q);
281 printf("%s\n", ntmp);
284 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
287 X509V3_add_value(ntmp, NULL, &values);
295 vtmp = strip_spaces(q);
297 printf("%s\n", ntmp);
300 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
303 X509V3_add_value(ntmp, vtmp, &values);
311 if(state == HDR_VALUE) {
312 vtmp = strip_spaces(q);
314 printf("%s=%s\n", ntmp, vtmp);
317 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
320 X509V3_add_value(ntmp, vtmp, &values);
322 ntmp = strip_spaces(q);
324 printf("%s\n", ntmp);
327 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
330 X509V3_add_value(ntmp, NULL, &values);
332 OPENSSL_free(linebuf);
336 OPENSSL_free(linebuf);
337 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
342 /* Delete leading and trailing spaces from a string */
343 static char *strip_spaces(char *name)
346 /* Skip over leading spaces */
348 while(*p && isspace((unsigned char)*p)) p++;
350 q = p + strlen(p) - 1;
351 while((q != p) && isspace((unsigned char)*q)) q--;
357 /* hex string utilities */
359 /* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
361 * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
364 char *hex_to_string(unsigned char *buffer, long len)
369 static char hexdig[] = "0123456789ABCDEF";
370 if(!buffer || !len) return NULL;
371 if(!(tmp = OPENSSL_malloc(len * 3 + 1))) {
372 X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
376 for(i = 0, p = buffer; i < len; i++,p++) {
377 *q++ = hexdig[(*p >> 4) & 0xf];
378 *q++ = hexdig[*p & 0xf];
382 #ifdef CHARSET_EBCDIC
383 ebcdic2ascii(tmp, tmp, q - tmp - 1);
389 /* Give a string of hex digits convert to
393 unsigned char *string_to_hex(char *str, long *len)
395 unsigned char *hexbuf, *q;
396 unsigned char ch, cl, *p;
398 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
401 if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err;
402 for(p = (unsigned char *)str, q = hexbuf; *p;) {
404 #ifdef CHARSET_EBCDIC
405 ch = os_toebcdic[ch];
407 if(ch == ':') continue;
409 #ifdef CHARSET_EBCDIC
410 cl = os_toebcdic[cl];
413 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
414 OPENSSL_free(hexbuf);
417 if(isupper(ch)) ch = tolower(ch);
418 if(isupper(cl)) cl = tolower(cl);
420 if((ch >= '0') && (ch <= '9')) ch -= '0';
421 else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10;
424 if((cl >= '0') && (cl <= '9')) cl -= '0';
425 else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10;
428 *q++ = (ch << 4) | cl;
431 if(len) *len = q - hexbuf;
436 if(hexbuf) OPENSSL_free(hexbuf);
437 X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
441 OPENSSL_free(hexbuf);
442 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
447 /* V2I name comparison function: returns zero if 'name' matches
451 int name_cmp(const char *name, const char *cmp)
456 if((ret = strncmp(name, cmp, len))) return ret;
458 if(!c || (c=='.')) return 0;
462 static int sk_strcmp(const char * const *a, const char * const *b)
464 return strcmp(*a, *b);
467 STACK *X509_get1_email(X509 *x)
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 *X509_REQ_get1_email(X509_REQ *x)
480 STACK_OF(X509_EXTENSION) *exts;
482 exts = X509_REQ_get_extensions(x);
483 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
484 ret = get_email(X509_REQ_get_subject_name(x), gens);
485 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
486 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
491 static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens)
495 ASN1_IA5STRING *email;
498 /* Now add any email address(es) to STACK */
500 /* First supplied X509_NAME */
501 while((i = X509_NAME_get_index_by_NID(name,
502 NID_pkcs9_emailAddress, i)) >= 0) {
503 ne = X509_NAME_get_entry(name, i);
504 email = X509_NAME_ENTRY_get_data(ne);
505 if(!append_ia5(&ret, email)) return NULL;
507 for(i = 0; i < sk_GENERAL_NAME_num(gens); i++)
509 gen = sk_GENERAL_NAME_value(gens, i);
510 if(gen->type != GEN_EMAIL) continue;
511 if(!append_ia5(&ret, gen->d.ia5)) return NULL;
516 static void str_free(void *str)
521 static int append_ia5(STACK **sk, ASN1_IA5STRING *email)
524 /* First some sanity checks */
525 if(email->type != V_ASN1_IA5STRING) return 1;
526 if(!email->data || !email->length) return 1;
527 if(!*sk) *sk = sk_new(sk_strcmp);
529 /* Don't add duplicates */
530 if(sk_find(*sk, (char *)email->data) != -1) return 1;
531 emtmp = BUF_strdup((char *)email->data);
532 if(!emtmp || !sk_push(*sk, emtmp)) {
533 X509_email_free(*sk);
540 void X509_email_free(STACK *sk)
542 sk_pop_free(sk, str_free);
545 /* Convert IP addresses both IPv4 and IPv6 into an
546 * OCTET STRING compatible with RFC3280.
549 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
551 unsigned char ipout[16];
552 ASN1_OCTET_STRING *ret;
555 /* If string contains a ':' assume IPv6 */
557 iplen = a2i_ipadd(ipout, ipasc);
562 ret = ASN1_OCTET_STRING_new();
565 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen))
567 ASN1_OCTET_STRING_free(ret);
573 ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
575 ASN1_OCTET_STRING *ret = NULL;
576 unsigned char ipout[32];
577 char *iptmp = NULL, *p;
579 p = strchr(ipasc,'/');
582 iptmp = BUF_strdup(ipasc);
585 p = iptmp + (p - ipasc);
588 iplen1 = a2i_ipadd(ipout, iptmp);
593 iplen2 = a2i_ipadd(ipout + iplen1, p);
598 if (!iplen2 || (iplen1 != iplen2))
601 ret = ASN1_OCTET_STRING_new();
604 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
613 ASN1_OCTET_STRING_free(ret);
618 static int a2i_ipadd(unsigned char *ipout, const char *ipasc)
620 /* If string contains a ':' assume IPv6 */
622 if (strchr(ipasc, ':'))
624 if (!ipv6_from_asc(ipout, ipasc))
630 if (!ipv4_from_asc(ipout, ipasc))
636 static int ipv4_from_asc(unsigned char *v4, const char *in)
639 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
641 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
642 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
652 /* Temporary store for IPV6 output */
653 unsigned char tmp[16];
654 /* Total number of bytes in tmp */
656 /* The position of a zero (corresponding to '::') */
658 /* Number of zeroes */
663 static int ipv6_from_asc(unsigned char *v6, const char *in)
667 v6stat.zero_pos = -1;
669 /* Treat the IPv6 representation as a list of values
670 * separated by ':'. The presence of a '::' will parse
671 * as one, two or three zero length elements.
673 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
676 /* Now for some sanity checks */
678 if (v6stat.zero_pos == -1)
680 /* If no '::' must have exactly 16 bytes */
681 if (v6stat.total != 16)
686 /* If '::' must have less than 16 bytes */
687 if (v6stat.total == 16)
689 /* More than three zeroes is an error */
690 if (v6stat.zero_cnt > 3)
692 /* Can only have three zeroes if nothing else present */
693 else if (v6stat.zero_cnt == 3)
695 if (v6stat.total > 0)
698 /* Can only have two zeroes if at start or end */
699 else if (v6stat.zero_cnt == 2)
701 if ((v6stat.zero_pos != 0)
702 && (v6stat.zero_pos != v6stat.total))
706 /* Can only have one zero if *not* start or end */
708 if ((v6stat.zero_pos == 0)
709 || (v6stat.zero_pos == v6stat.total))
716 /* Copy initial part */
717 if (v6stat.zero_pos > 0)
718 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
720 if (v6stat.total != 16)
721 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
722 /* Copy final part */
723 if (v6stat.total != v6stat.zero_pos)
724 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
725 v6stat.tmp + v6stat.zero_pos,
726 v6stat.total - v6stat.zero_pos);
731 static int ipv6_cb(const char *elem, int len, void *usr)
734 /* Error if 16 bytes written */
739 /* Zero length element, corresponds to '::' */
740 if (s->zero_pos == -1)
741 s->zero_pos = s->total;
742 /* If we've already got a :: its an error */
743 else if (s->zero_pos != s->total)
749 /* If more than 4 characters could be final a.b.c.d form */
752 /* Need at least 4 bytes left */
755 /* Must be end of string */
758 if (!ipv4_from_asc(s->tmp + s->total, elem))
764 if (!ipv6_hex(s->tmp + s->total, elem, len))
772 /* Convert a string of up to 4 hex digits into the corresponding
776 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
779 unsigned int num = 0;
786 if ((c >= '0') && (c <= '9'))
788 else if ((c >= 'A') && (c <= 'F'))
790 else if ((c >= 'a') && (c <= 'f'))
801 int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk,
802 unsigned long chtype)
810 for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++)
812 v=sk_CONF_VALUE_value(dn_sk,i);
814 /* Skip past any leading X. X: X, etc to allow for
817 for(p = type; *p ; p++)
818 #ifndef CHARSET_EBCDIC
819 if ((*p == ':') || (*p == ',') || (*p == '.'))
821 if ((*p == os_toascii[':']) || (*p == os_toascii[',']) || (*p == os_toascii['.']))
828 #ifndef CHARSET_EBCDIC
831 if (*p == os_toascii['+'])
839 if (!X509_NAME_add_entry_by_txt(nm,type, chtype,
840 (unsigned char *) v->value,-1,-1,mval))