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 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(unsigned char *buffer, long len)
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(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 *X509_get1_email(X509 *x)
470
gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
471
ret = get_email(X509_get_subject_name(x), gens);
472
sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
476
STACK *X509_get1_ocsp(X509 *x)
478
AUTHORITY_INFO_ACCESS *info;
481
info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
484
for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++)
486
ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
487
if (OBJ_obj2nid(ad->method) == NID_ad_OCSP)
489
if (ad->location->type == GEN_URI)
491
if (!append_ia5(&ret, ad->location->d.uniformResourceIdentifier))
496
AUTHORITY_INFO_ACCESS_free(info);
500
STACK *X509_REQ_get1_email(X509_REQ *x)
503
STACK_OF(X509_EXTENSION) *exts;
505
exts = X509_REQ_get_extensions(x);
506
gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
507
ret = get_email(X509_REQ_get_subject_name(x), gens);
508
sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
509
sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
514
static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens)
518
ASN1_IA5STRING *email;
521
/* Now add any email address(es) to STACK */
523
/* First supplied X509_NAME */
524
while((i = X509_NAME_get_index_by_NID(name,
525
NID_pkcs9_emailAddress, i)) >= 0) {
526
ne = X509_NAME_get_entry(name, i);
527
email = X509_NAME_ENTRY_get_data(ne);
528
if(!append_ia5(&ret, email)) return NULL;
530
for(i = 0; i < sk_GENERAL_NAME_num(gens); i++)
532
gen = sk_GENERAL_NAME_value(gens, i);
533
if(gen->type != GEN_EMAIL) continue;
534
if(!append_ia5(&ret, gen->d.ia5)) return NULL;
539
static void str_free(void *str)
544
static int append_ia5(STACK **sk, ASN1_IA5STRING *email)
547
/* First some sanity checks */
548
if(email->type != V_ASN1_IA5STRING) return 1;
549
if(!email->data || !email->length) return 1;
550
if(!*sk) *sk = sk_new(sk_strcmp);
552
/* Don't add duplicates */
553
if(sk_find(*sk, (char *)email->data) != -1) return 1;
554
emtmp = BUF_strdup((char *)email->data);
555
if(!emtmp || !sk_push(*sk, emtmp)) {
556
X509_email_free(*sk);
563
void X509_email_free(STACK *sk)
565
sk_pop_free(sk, str_free);
568
/* Convert IP addresses both IPv4 and IPv6 into an
569
* OCTET STRING compatible with RFC3280.
572
ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
574
unsigned char ipout[16];
575
ASN1_OCTET_STRING *ret;
578
/* If string contains a ':' assume IPv6 */
580
iplen = a2i_ipadd(ipout, ipasc);
585
ret = ASN1_OCTET_STRING_new();
588
if (!ASN1_OCTET_STRING_set(ret, ipout, iplen))
590
ASN1_OCTET_STRING_free(ret);
596
ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
598
ASN1_OCTET_STRING *ret = NULL;
599
unsigned char ipout[32];
600
char *iptmp = NULL, *p;
602
p = strchr(ipasc,'/');
605
iptmp = BUF_strdup(ipasc);
608
p = iptmp + (p - ipasc);
611
iplen1 = a2i_ipadd(ipout, iptmp);
616
iplen2 = a2i_ipadd(ipout + iplen1, p);
621
if (!iplen2 || (iplen1 != iplen2))
624
ret = ASN1_OCTET_STRING_new();
627
if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
636
ASN1_OCTET_STRING_free(ret);
641
int a2i_ipadd(unsigned char *ipout, const char *ipasc)
643
/* If string contains a ':' assume IPv6 */
645
if (strchr(ipasc, ':'))
647
if (!ipv6_from_asc(ipout, ipasc))
653
if (!ipv4_from_asc(ipout, ipasc))
659
static int ipv4_from_asc(unsigned char *v4, const char *in)
662
if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
664
if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
665
|| (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
675
/* Temporary store for IPV6 output */
676
unsigned char tmp[16];
677
/* Total number of bytes in tmp */
679
/* The position of a zero (corresponding to '::') */
681
/* Number of zeroes */
686
static int ipv6_from_asc(unsigned char *v6, const char *in)
690
v6stat.zero_pos = -1;
692
/* Treat the IPv6 representation as a list of values
693
* separated by ':'. The presence of a '::' will parse
694
* as one, two or three zero length elements.
696
if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
699
/* Now for some sanity checks */
701
if (v6stat.zero_pos == -1)
703
/* If no '::' must have exactly 16 bytes */
704
if (v6stat.total != 16)
709
/* If '::' must have less than 16 bytes */
710
if (v6stat.total == 16)
712
/* More than three zeroes is an error */
713
if (v6stat.zero_cnt > 3)
715
/* Can only have three zeroes if nothing else present */
716
else if (v6stat.zero_cnt == 3)
718
if (v6stat.total > 0)
721
/* Can only have two zeroes if at start or end */
722
else if (v6stat.zero_cnt == 2)
724
if ((v6stat.zero_pos != 0)
725
&& (v6stat.zero_pos != v6stat.total))
729
/* Can only have one zero if *not* start or end */
731
if ((v6stat.zero_pos == 0)
732
|| (v6stat.zero_pos == v6stat.total))
739
/* Copy initial part */
740
if (v6stat.zero_pos > 0)
741
memcpy(v6, v6stat.tmp, v6stat.zero_pos);
743
if (v6stat.total != 16)
744
memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
745
/* Copy final part */
746
if (v6stat.total != v6stat.zero_pos)
747
memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
748
v6stat.tmp + v6stat.zero_pos,
749
v6stat.total - v6stat.zero_pos);
754
static int ipv6_cb(const char *elem, int len, void *usr)
757
/* Error if 16 bytes written */
762
/* Zero length element, corresponds to '::' */
763
if (s->zero_pos == -1)
764
s->zero_pos = s->total;
765
/* If we've already got a :: its an error */
766
else if (s->zero_pos != s->total)
772
/* If more than 4 characters could be final a.b.c.d form */
775
/* Need at least 4 bytes left */
778
/* Must be end of string */
781
if (!ipv4_from_asc(s->tmp + s->total, elem))
787
if (!ipv6_hex(s->tmp + s->total, elem, len))
795
/* Convert a string of up to 4 hex digits into the corresponding
799
static int ipv6_hex(unsigned char *out, const char *in, int inlen)
802
unsigned int num = 0;
809
if ((c >= '0') && (c <= '9'))
811
else if ((c >= 'A') && (c <= 'F'))
813
else if ((c >= 'a') && (c <= 'f'))
824
int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk,
825
unsigned long chtype)
833
for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++)
835
v=sk_CONF_VALUE_value(dn_sk,i);
837
/* Skip past any leading X. X: X, etc to allow for
840
for(p = type; *p ; p++)
841
#ifndef CHARSET_EBCDIC
842
if ((*p == ':') || (*p == ',') || (*p == '.'))
844
if ((*p == os_toascii[':']) || (*p == os_toascii[',']) || (*p == os_toascii['.']))
851
#ifndef CHARSET_EBCDIC
854
if (*type == os_toascii['+'])
862
if (!X509_NAME_add_entry_by_txt(nm,type, chtype,
863
(unsigned char *) v->value,-1,-1,mval))