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>
67 static char *strip_spaces(char *name);
68 static int sk_strcmp(const char * const *a, const char * const *b);
69 static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens);
70 static void str_free(void *str);
71 static int append_ia5(STACK **sk, ASN1_IA5STRING *email);
73 static int ipv4_from_asc(unsigned char *v4, const char *in);
74 static int ipv6_from_asc(unsigned char *v6, const char *in);
75 static int ipv6_cb(const char *elem, int len, void *usr);
76 static int ipv6_hex(unsigned char *out, const char *in, int inlen);
78 /* Add a CONF_VALUE name value pair to stack */
80 int X509V3_add_value(const char *name, const char *value,
81 STACK_OF(CONF_VALUE) **extlist)
83 CONF_VALUE *vtmp = NULL;
84 char *tname = NULL, *tvalue = NULL;
85 if(name && !(tname = BUF_strdup(name))) goto err;
86 if(value && !(tvalue = BUF_strdup(value))) goto err;;
87 if(!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) goto err;
88 if(!*extlist && !(*extlist = sk_CONF_VALUE_new_null())) goto err;
92 if(!sk_CONF_VALUE_push(*extlist, vtmp)) goto err;
95 X509V3err(X509V3_F_X509V3_ADD_VALUE,ERR_R_MALLOC_FAILURE);
96 if(vtmp) OPENSSL_free(vtmp);
97 if(tname) OPENSSL_free(tname);
98 if(tvalue) OPENSSL_free(tvalue);
102 int X509V3_add_value_uchar(const char *name, const unsigned char *value,
103 STACK_OF(CONF_VALUE) **extlist)
105 return X509V3_add_value(name,(const char *)value,extlist);
108 /* Free function for STACK_OF(CONF_VALUE) */
110 void X509V3_conf_free(CONF_VALUE *conf)
113 if(conf->name) OPENSSL_free(conf->name);
114 if(conf->value) OPENSSL_free(conf->value);
115 if(conf->section) OPENSSL_free(conf->section);
119 int X509V3_add_value_bool(const char *name, int asn1_bool,
120 STACK_OF(CONF_VALUE) **extlist)
122 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
123 return X509V3_add_value(name, "FALSE", extlist);
126 int X509V3_add_value_bool_nf(char *name, int asn1_bool,
127 STACK_OF(CONF_VALUE) **extlist)
129 if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
134 char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
136 BIGNUM *bntmp = NULL;
139 if(!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
140 !(strtmp = BN_bn2dec(bntmp)) )
141 X509V3err(X509V3_F_I2S_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
146 char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
148 BIGNUM *bntmp = NULL;
151 if(!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
152 !(strtmp = BN_bn2dec(bntmp)) )
153 X509V3err(X509V3_F_I2S_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
158 ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
165 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE);
169 if (value[0] == '-') {
174 if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
179 if (ishex) ret = BN_hex2bn(&bn, value);
180 else ret = BN_dec2bn(&bn, value);
182 if (!ret || value[ret]) {
184 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR);
188 if (isneg && BN_is_zero(bn)) isneg = 0;
190 aint = BN_to_ASN1_INTEGER(bn, NULL);
193 X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
196 if (isneg) aint->type |= V_ASN1_NEG;
200 int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
201 STACK_OF(CONF_VALUE) **extlist)
206 if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0;
207 ret = X509V3_add_value(name, strtmp, extlist);
208 OPENSSL_free(strtmp);
212 int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
215 if(!(btmp = value->value)) goto err;
216 if(!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
217 || !strcmp(btmp, "Y") || !strcmp(btmp, "y")
218 || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
221 } else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
222 || !strcmp(btmp, "N") || !strcmp(btmp, "n")
223 || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
228 X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,X509V3_R_INVALID_BOOLEAN_STRING);
229 X509V3_conf_err(value);
233 int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
236 if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
237 X509V3_conf_err(value);
249 STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
253 STACK_OF(CONF_VALUE) *values = NULL;
256 /* We are going to modify the line so copy it first */
257 linebuf = BUF_strdup(line);
260 /* Go through all characters */
261 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
268 ntmp = strip_spaces(q);
270 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
274 } else if(c == ',') {
276 ntmp = strip_spaces(q);
279 printf("%s\n", ntmp);
282 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
285 X509V3_add_value(ntmp, NULL, &values);
293 vtmp = strip_spaces(q);
295 printf("%s\n", ntmp);
298 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
301 X509V3_add_value(ntmp, vtmp, &values);
309 if(state == HDR_VALUE) {
310 vtmp = strip_spaces(q);
312 printf("%s=%s\n", ntmp, vtmp);
315 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
318 X509V3_add_value(ntmp, vtmp, &values);
320 ntmp = strip_spaces(q);
322 printf("%s\n", ntmp);
325 X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
328 X509V3_add_value(ntmp, NULL, &values);
330 OPENSSL_free(linebuf);
334 OPENSSL_free(linebuf);
335 sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
340 /* Delete leading and trailing spaces from a string */
341 static char *strip_spaces(char *name)
344 /* Skip over leading spaces */
346 while(*p && isspace((unsigned char)*p)) p++;
348 q = p + strlen(p) - 1;
349 while((q != p) && isspace((unsigned char)*q)) q--;
355 /* hex string utilities */
357 /* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
359 * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
362 char *hex_to_string(unsigned char *buffer, long len)
367 static char hexdig[] = "0123456789ABCDEF";
368 if(!buffer || !len) return NULL;
369 if(!(tmp = OPENSSL_malloc(len * 3 + 1))) {
370 X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
374 for(i = 0, p = buffer; i < len; i++,p++) {
375 *q++ = hexdig[(*p >> 4) & 0xf];
376 *q++ = hexdig[*p & 0xf];
380 #ifdef CHARSET_EBCDIC
381 ebcdic2ascii(tmp, tmp, q - tmp - 1);
387 /* Give a string of hex digits convert to
391 unsigned char *string_to_hex(char *str, long *len)
393 unsigned char *hexbuf, *q;
394 unsigned char ch, cl, *p;
396 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
399 if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err;
400 for(p = (unsigned char *)str, q = hexbuf; *p;) {
402 #ifdef CHARSET_EBCDIC
403 ch = os_toebcdic[ch];
405 if(ch == ':') continue;
407 #ifdef CHARSET_EBCDIC
408 cl = os_toebcdic[cl];
411 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
412 OPENSSL_free(hexbuf);
415 if(isupper(ch)) ch = tolower(ch);
416 if(isupper(cl)) cl = tolower(cl);
418 if((ch >= '0') && (ch <= '9')) ch -= '0';
419 else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10;
422 if((cl >= '0') && (cl <= '9')) cl -= '0';
423 else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10;
426 *q++ = (ch << 4) | cl;
429 if(len) *len = q - hexbuf;
434 if(hexbuf) OPENSSL_free(hexbuf);
435 X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
439 OPENSSL_free(hexbuf);
440 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
445 /* V2I name comparison function: returns zero if 'name' matches
449 int name_cmp(const char *name, const char *cmp)
454 if((ret = strncmp(name, cmp, len))) return ret;
456 if(!c || (c=='.')) return 0;
460 static int sk_strcmp(const char * const *a, const char * const *b)
462 return strcmp(*a, *b);
465 STACK *X509_get1_email(X509 *x)
469 gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
470 ret = get_email(X509_get_subject_name(x), gens);
471 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
475 STACK *X509_REQ_get1_email(X509_REQ *x)
478 STACK_OF(X509_EXTENSION) *exts;
480 exts = X509_REQ_get_extensions(x);
481 gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
482 ret = get_email(X509_REQ_get_subject_name(x), gens);
483 sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
484 sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
489 static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens)
493 ASN1_IA5STRING *email;
496 /* Now add any email address(es) to STACK */
498 /* First supplied X509_NAME */
499 while((i = X509_NAME_get_index_by_NID(name,
500 NID_pkcs9_emailAddress, i)) >= 0) {
501 ne = X509_NAME_get_entry(name, i);
502 email = X509_NAME_ENTRY_get_data(ne);
503 if(!append_ia5(&ret, email)) return NULL;
505 for(i = 0; i < sk_GENERAL_NAME_num(gens); i++)
507 gen = sk_GENERAL_NAME_value(gens, i);
508 if(gen->type != GEN_EMAIL) continue;
509 if(!append_ia5(&ret, gen->d.ia5)) return NULL;
514 static void str_free(void *str)
519 static int append_ia5(STACK **sk, ASN1_IA5STRING *email)
522 /* First some sanity checks */
523 if(email->type != V_ASN1_IA5STRING) return 1;
524 if(!email->data || !email->length) return 1;
525 if(!*sk) *sk = sk_new(sk_strcmp);
527 /* Don't add duplicates */
528 if(sk_find(*sk, (char *)email->data) != -1) return 1;
529 emtmp = BUF_strdup((char *)email->data);
530 if(!emtmp || !sk_push(*sk, emtmp)) {
531 X509_email_free(*sk);
538 void X509_email_free(STACK *sk)
540 sk_pop_free(sk, str_free);
543 /* Convert IP addresses both IPv4 and IPv6 into an
544 * OCTET STRING compatible with RFC3280.
547 ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
549 unsigned char ipout[16];
550 ASN1_OCTET_STRING *ret;
553 /* If string contains a ':' assume IPv6 */
555 if (strchr(ipasc, ':'))
557 if (!ipv6_from_asc(ipout, ipasc))
563 if (!ipv4_from_asc(ipout, ipasc))
568 ret = ASN1_OCTET_STRING_new();
571 if (!ASN1_OCTET_STRING_set(ret, ipout, iplen))
573 ASN1_OCTET_STRING_free(ret);
579 static int ipv4_from_asc(unsigned char *v4, const char *in)
582 if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
584 if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
585 || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
595 /* Temporary store for IPV6 output */
596 unsigned char tmp[16];
597 /* Total number of bytes in tmp */
599 /* The position of a zero (corresponding to '::') */
601 /* Number of zeroes */
606 static int ipv6_from_asc(unsigned char *v6, const char *in)
610 v6stat.zero_pos = -1;
612 /* Treat the IPv6 representation as a list of values
613 * separated by ':'. The presence of a '::' will parse
614 * as one, two or three zero length elements.
616 if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
619 /* Now for some sanity checks */
621 if (v6stat.zero_pos == -1)
623 /* If no '::' must have exactly 16 bytes */
624 if (v6stat.total != 16)
629 /* If '::' must have less than 16 bytes */
630 if (v6stat.total == 16)
632 /* More than three zeroes is an error */
633 if (v6stat.zero_cnt > 3)
635 /* Can only have three zeroes if nothing else present */
636 else if (v6stat.zero_cnt == 3)
638 if (v6stat.total > 0)
641 /* Can only have two zeroes if at start or end */
642 else if (v6stat.zero_cnt == 2)
644 if ((v6stat.zero_pos != 0)
645 && (v6stat.zero_pos != v6stat.total))
649 /* Can only have one zero if *not* start or end */
651 if ((v6stat.zero_pos == 0)
652 || (v6stat.zero_pos == v6stat.total))
659 /* Copy initial part */
660 if (v6stat.zero_pos > 0)
661 memcpy(v6, v6stat.tmp, v6stat.zero_pos);
663 if (v6stat.total != 16)
664 memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
665 /* Copy final part */
666 if (v6stat.total != v6stat.zero_pos)
667 memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
668 v6stat.tmp + v6stat.zero_pos,
669 v6stat.total - v6stat.zero_pos);
674 static int ipv6_cb(const char *elem, int len, void *usr)
677 /* Error if 16 bytes written */
682 /* Zero length element, corresponds to '::' */
683 if (s->zero_pos == -1)
684 s->zero_pos = s->total;
685 /* If we've already got a :: its an error */
686 else if (s->zero_pos != s->total)
692 /* If more than 4 characters could be final a.b.c.d form */
695 /* Need at least 4 bytes left */
698 /* Must be end of string */
701 if (!ipv4_from_asc(s->tmp + s->total, elem))
707 if (!ipv6_hex(s->tmp + s->total, elem, len))
715 /* Convert a string of up to 4 hex digits into the corresponding
719 static int ipv6_hex(unsigned char *out, const char *in, int inlen)
722 unsigned int num = 0;
729 if ((c >= '0') && (c <= '9'))
731 else if ((c >= 'A') && (c <= 'F'))
733 else if ((c >= 'a') && (c <= 'f'))