2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2000 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).
61 #include <openssl/crypto.h>
62 #include <openssl/x509.h>
63 #include <openssl/asn1.h>
67 /* ASN1_STRING_print_ex() and X509_NAME_print_ex().
68 * Enhanced string and name printing routines handling
69 * multibyte characters, RFC2253 and a host of other
74 #define CHARTYPE_BS_ESC (ASN1_STRFLGS_ESC_2253 | CHARTYPE_FIRST_ESC_2253 | CHARTYPE_LAST_ESC_2253)
77 /* Three IO functions for sending data to memory, a BIO and
80 #if 0 /* never used */
81 static int send_mem_chars(void *arg
, const void *buf
, int len
)
83 unsigned char **out
= arg
;
85 memcpy(*out
, buf
, len
);
91 static int send_bio_chars(void *arg
, const void *buf
, int len
)
94 if(BIO_write(arg
, buf
, len
) != len
) return 0;
98 static int send_fp_chars(void *arg
, const void *buf
, int len
)
101 if(fwrite(buf
, 1, len
, arg
) != (unsigned int)len
) return 0;
105 typedef int char_io(void *arg
, const void *buf
, int len
);
107 /* This function handles display of
108 * strings, one character at a time.
109 * It is passed an unsigned long for each
110 * character because it could come from 2 or even
114 static int do_esc_char(unsigned long c
, unsigned char flags
, char *do_quotes
, char_io
*io_ch
, void *arg
)
116 unsigned char chflgs
, chtmp
;
119 BIO_snprintf(tmphex
, 11, "\\W%08lX", c
);
120 if(!io_ch(arg
, tmphex
, 10)) return -1;
124 BIO_snprintf(tmphex
, 11, "\\U%04lX", c
);
125 if(!io_ch(arg
, tmphex
, 6)) return -1;
128 chtmp
= (unsigned char)c
;
129 if(chtmp
> 0x7f) chflgs
= flags
& ASN1_STRFLGS_ESC_MSB
;
130 else chflgs
= char_type
[chtmp
] & flags
;
131 if(chflgs
& CHARTYPE_BS_ESC
) {
132 /* If we don't escape with quotes, signal we need quotes */
133 if(chflgs
& ASN1_STRFLGS_ESC_QUOTE
) {
134 if(do_quotes
) *do_quotes
= 1;
135 if(!io_ch(arg
, &chtmp
, 1)) return -1;
138 if(!io_ch(arg
, "\\", 1)) return -1;
139 if(!io_ch(arg
, &chtmp
, 1)) return -1;
142 if(chflgs
& (ASN1_STRFLGS_ESC_CTRL
|ASN1_STRFLGS_ESC_MSB
)) {
143 BIO_snprintf(tmphex
, 11, "\\%02X", chtmp
);
144 if(!io_ch(arg
, tmphex
, 3)) return -1;
147 if(!io_ch(arg
, &chtmp
, 1)) return -1;
151 #define BUF_TYPE_WIDTH_MASK 0x7
152 #define BUF_TYPE_CONVUTF8 0x8
154 /* This function sends each character in a buffer to
155 * do_esc_char(). It interprets the content formats
156 * and converts to or from UTF8 as appropriate.
159 static int do_buf(unsigned char *buf
, int buflen
,
160 int type
, unsigned char flags
, char *quotes
, char_io
*io_ch
, void *arg
)
163 unsigned char orflags
, *p
, *q
;
169 if(p
== buf
) orflags
= CHARTYPE_FIRST_ESC_2253
;
171 switch(type
& BUF_TYPE_WIDTH_MASK
) {
173 c
= ((unsigned long)*p
++) << 24;
174 c
|= ((unsigned long)*p
++) << 16;
175 c
|= ((unsigned long)*p
++) << 8;
180 c
= ((unsigned long)*p
++) << 8;
189 i
= UTF8_getc(p
, buflen
, &c
);
190 if(i
< 0) return -1; /* Invalid UTF8String */
194 if (p
== q
) orflags
= CHARTYPE_LAST_ESC_2253
;
195 if(type
& BUF_TYPE_CONVUTF8
) {
196 unsigned char utfbuf
[6];
198 utflen
= UTF8_putc(utfbuf
, 6, c
);
199 for(i
= 0; i
< utflen
; i
++) {
200 /* We don't need to worry about setting orflags correctly
201 * because if utflen==1 its value will be correct anyway
202 * otherwise each character will be > 0x7f and so the
203 * character will never be escaped on first and last.
205 len
= do_esc_char(utfbuf
[i
], (unsigned char)(flags
| orflags
), quotes
, io_ch
, arg
);
206 if(len
< 0) return -1;
210 len
= do_esc_char(c
, (unsigned char)(flags
| orflags
), quotes
, io_ch
, arg
);
211 if(len
< 0) return -1;
218 /* This function hex dumps a buffer of characters */
220 static int do_hex_dump(char_io
*io_ch
, void *arg
, unsigned char *buf
, int buflen
)
222 const static char hexdig
[] = "0123456789ABCDEF";
223 unsigned char *p
, *q
;
229 hextmp
[0] = hexdig
[*p
>> 4];
230 hextmp
[1] = hexdig
[*p
& 0xf];
231 if(!io_ch(arg
, hextmp
, 2)) return -1;
238 /* "dump" a string. This is done when the type is unknown,
239 * or the flags request it. We can either dump the content
240 * octets or the entire DER encoding. This uses the RFC2253
244 static int do_dump(unsigned long lflags
, char_io
*io_ch
, void *arg
, ASN1_STRING
*str
)
246 /* Placing the ASN1_STRING in a temp ASN1_TYPE allows
247 * the DER encoding to readily obtained
250 unsigned char *der_buf
, *p
;
253 if(!io_ch(arg
, "#", 1)) return -1;
254 /* If we don't dump DER encoding just dump content octets */
255 if(!(lflags
& ASN1_STRFLGS_DUMP_DER
)) {
256 outlen
= do_hex_dump(io_ch
, arg
, str
->data
, str
->length
);
257 if(outlen
< 0) return -1;
261 t
.value
.ptr
= (char *)str
;
262 der_len
= i2d_ASN1_TYPE(&t
, NULL
);
263 der_buf
= OPENSSL_malloc(der_len
);
264 if(!der_buf
) return -1;
266 i2d_ASN1_TYPE(&t
, &p
);
267 outlen
= do_hex_dump(io_ch
, arg
, der_buf
, der_len
);
268 OPENSSL_free(der_buf
);
269 if(outlen
< 0) return -1;
273 /* Lookup table to convert tags to character widths,
274 * 0 = UTF8 encoded, -1 is used for non string types
275 * otherwise it is the number of bytes per character
278 const static char tag2nbyte
[] = {
279 -1, -1, -1, -1, -1, /* 0-4 */
280 -1, -1, -1, -1, -1, /* 5-9 */
281 -1, -1, 0, -1, /* 10-13 */
282 -1, -1, -1, -1, /* 15-17 */
283 -1, 1, 1, /* 18-20 */
284 -1, 1, -1,-1, /* 21-24 */
285 -1, 1, -1, /* 25-27 */
289 #define ESC_FLAGS (ASN1_STRFLGS_ESC_2253 | \
290 ASN1_STRFLGS_ESC_QUOTE | \
291 ASN1_STRFLGS_ESC_CTRL | \
292 ASN1_STRFLGS_ESC_MSB)
294 /* This is the main function, print out an
295 * ASN1_STRING taking note of various escape
296 * and display options. Returns number of
297 * characters written or -1 if an error
301 static int do_print_ex(char_io
*io_ch
, void *arg
, unsigned long lflags
, ASN1_STRING
*str
)
308 /* Keep a copy of escape flags */
309 flags
= (unsigned char)(lflags
& ESC_FLAGS
);
316 if(lflags
& ASN1_STRFLGS_SHOW_TYPE
) {
318 tagname
= ASN1_tag2str(type
);
319 outlen
+= strlen(tagname
);
320 if(!io_ch(arg
, tagname
, outlen
) || !io_ch(arg
, ":", 1)) return -1;
324 /* Decide what to do with type, either dump content or display it */
326 /* Dump everything */
327 if(lflags
& ASN1_STRFLGS_DUMP_ALL
) type
= -1;
328 /* Ignore the string type */
329 else if(lflags
& ASN1_STRFLGS_IGNORE_TYPE
) type
= 1;
331 /* Else determine width based on type */
332 if((type
> 0) && (type
< 31)) type
= tag2nbyte
[type
];
334 if((type
== -1) && !(lflags
& ASN1_STRFLGS_DUMP_UNKNOWN
)) type
= 1;
338 len
= do_dump(lflags
, io_ch
, arg
, str
);
339 if(len
< 0) return -1;
344 if(lflags
& ASN1_STRFLGS_UTF8_CONVERT
) {
345 /* Note: if string is UTF8 and we want
346 * to convert to UTF8 then we just interpret
347 * it as 1 byte per character to avoid converting
351 else type
|= BUF_TYPE_CONVUTF8
;
354 len
= do_buf(str
->data
, str
->length
, type
, flags
, "es
, io_ch
, NULL
);
355 if(outlen
< 0) return -1;
357 if(quotes
) outlen
+= 2;
358 if(!arg
) return outlen
;
359 if(quotes
&& !io_ch(arg
, "\"", 1)) return -1;
360 do_buf(str
->data
, str
->length
, type
, flags
, NULL
, io_ch
, arg
);
361 if(quotes
&& !io_ch(arg
, "\"", 1)) return -1;
365 /* Used for line indenting: print 'indent' spaces */
367 static int do_indent(char_io
*io_ch
, void *arg
, int indent
)
370 for(i
= 0; i
< indent
; i
++)
371 if(!io_ch(arg
, " ", 1)) return 0;
375 #define FN_WIDTH_LN 25
376 #define FN_WIDTH_SN 10
378 static int do_name_ex(char_io
*io_ch
, void *arg
, X509_NAME
*n
,
379 int indent
, unsigned long flags
)
381 int i
, prev
= -1, orflags
, cnt
;
385 X509_NAME_ENTRY
*ent
;
389 char *sep_dn
, *sep_mv
, *sep_eq
;
390 int sep_dn_len
, sep_mv_len
, sep_eq_len
;
391 if(indent
< 0) indent
= 0;
393 if(!do_indent(io_ch
, arg
, indent
)) return -1;
394 switch (flags
& XN_FLAG_SEP_MASK
)
396 case XN_FLAG_SEP_MULTILINE
:
403 case XN_FLAG_SEP_COMMA_PLUS
:
411 case XN_FLAG_SEP_CPLUS_SPC
:
419 case XN_FLAG_SEP_SPLUS_SPC
:
431 if(flags
& XN_FLAG_SPC_EQ
) {
439 fn_opt
= flags
& XN_FLAG_FN_MASK
;
441 cnt
= X509_NAME_entry_count(n
);
442 for(i
= 0; i
< cnt
; i
++) {
443 if(flags
& XN_FLAG_DN_REV
)
444 ent
= X509_NAME_get_entry(n
, cnt
- i
- 1);
445 else ent
= X509_NAME_get_entry(n
, i
);
447 if(prev
== ent
->set
) {
448 if(!io_ch(arg
, sep_mv
, sep_mv_len
)) return -1;
449 outlen
+= sep_mv_len
;
451 if(!io_ch(arg
, sep_dn
, sep_dn_len
)) return -1;
452 outlen
+= sep_dn_len
;
453 if(!do_indent(io_ch
, arg
, indent
)) return -1;
458 fn
= X509_NAME_ENTRY_get_object(ent
);
459 val
= X509_NAME_ENTRY_get_data(ent
);
460 fn_nid
= OBJ_obj2nid(fn
);
461 if(fn_opt
!= XN_FLAG_FN_NONE
) {
463 if((fn_opt
== XN_FLAG_FN_OID
) || (fn_nid
==NID_undef
) ) {
464 OBJ_obj2txt(objtmp
, 80, fn
, 1);
465 fld_len
= 0; /* XXX: what should this be? */
468 if(fn_opt
== XN_FLAG_FN_SN
) {
469 fld_len
= FN_WIDTH_SN
;
470 objbuf
= OBJ_nid2sn(fn_nid
);
471 } else if(fn_opt
== XN_FLAG_FN_LN
) {
472 fld_len
= FN_WIDTH_LN
;
473 objbuf
= OBJ_nid2ln(fn_nid
);
475 fld_len
= 0; /* XXX: what should this be? */
479 objlen
= strlen(objbuf
);
480 if(!io_ch(arg
, objbuf
, objlen
)) return -1;
481 if ((objlen
< fld_len
) && (flags
& XN_FLAG_FN_ALIGN
)) {
482 if (!do_indent(io_ch
, arg
, fld_len
- objlen
)) return -1;
483 outlen
+= fld_len
- objlen
;
485 if(!io_ch(arg
, sep_eq
, sep_eq_len
)) return -1;
486 outlen
+= objlen
+ sep_eq_len
;
488 /* If the field name is unknown then fix up the DER dump
489 * flag. We might want to limit this further so it will
490 * DER dump on anything other than a few 'standard' fields.
492 if((fn_nid
== NID_undef
) && (flags
& XN_FLAG_DUMP_UNKNOWN_FIELDS
))
493 orflags
= ASN1_STRFLGS_DUMP_ALL
;
496 len
= do_print_ex(io_ch
, arg
, flags
| orflags
, val
);
497 if(len
< 0) return -1;
503 /* Wrappers round the main functions */
505 int X509_NAME_print_ex(BIO
*out
, X509_NAME
*nm
, int indent
, unsigned long flags
)
507 if(flags
== XN_FLAG_COMPAT
)
508 return X509_NAME_print(out
, nm
, indent
);
509 return do_name_ex(send_bio_chars
, out
, nm
, indent
, flags
);
513 int X509_NAME_print_ex_fp(FILE *fp
, X509_NAME
*nm
, int indent
, unsigned long flags
)
515 if(flags
== XN_FLAG_COMPAT
)
519 btmp
= BIO_new_fp(fp
, BIO_NOCLOSE
);
521 ret
= X509_NAME_print(btmp
, nm
, indent
);
525 return do_name_ex(send_fp_chars
, fp
, nm
, indent
, flags
);
528 int ASN1_STRING_print_ex(BIO
*out
, ASN1_STRING
*str
, unsigned long flags
)
530 return do_print_ex(send_bio_chars
, out
, flags
, str
);
534 int ASN1_STRING_print_ex_fp(FILE *fp
, ASN1_STRING
*str
, unsigned long flags
)
536 return do_print_ex(send_fp_chars
, fp
, flags
, str
);
539 /* Utility function: convert any string type to UTF8, returns number of bytes
540 * in output string or a negative error code
543 int ASN1_STRING_to_UTF8(unsigned char **out
, ASN1_STRING
*in
)
545 ASN1_STRING stmp
, *str
= &stmp
;
546 int mbflag
, type
, ret
;
547 if(!*out
|| !in
) return -1;
549 if((type
< 0) || (type
> 30)) return -1;
550 mbflag
= tag2nbyte
[type
];
551 if(mbflag
== -1) return -1;
552 mbflag
|= MBSTRING_FLAG
;
554 ret
= ASN1_mbstring_copy(&str
, in
->data
, in
->length
, mbflag
, B_ASN1_UTF8STRING
);
555 if(ret
< 0) return ret
;
556 if(out
) *out
= stmp
.data
;