2 * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
12 #include "internal/cryptlib.h"
13 #include <openssl/crypto.h>
14 #include <openssl/x509.h>
15 #include <openssl/asn1.h>
20 * ASN1_STRING_print_ex() and X509_NAME_print_ex(). Enhanced string and name
21 * printing routines handling multibyte characters, RFC2253 and a host of
25 #define CHARTYPE_BS_ESC (ASN1_STRFLGS_ESC_2253 | CHARTYPE_FIRST_ESC_2253 | CHARTYPE_LAST_ESC_2253)
27 #define ESC_FLAGS (ASN1_STRFLGS_ESC_2253 | \
28 ASN1_STRFLGS_ESC_QUOTE | \
29 ASN1_STRFLGS_ESC_CTRL | \
33 * Three IO functions for sending data to memory, a BIO and and a FILE
36 static int send_bio_chars(void *arg, const void *buf, int len)
40 if (BIO_write(arg, buf, len) != len)
45 #ifndef OPENSSL_NO_STDIO
46 static int send_fp_chars(void *arg, const void *buf, int len)
50 if (fwrite(buf, 1, len, arg) != (unsigned int)len)
56 typedef int char_io (void *arg, const void *buf, int len);
59 * This function handles display of strings, one character at a time. It is
60 * passed an unsigned long for each character because it could come from 2 or
64 static int do_esc_char(unsigned long c, unsigned char flags, char *do_quotes,
65 char_io *io_ch, void *arg)
67 unsigned char chflgs, chtmp;
68 char tmphex[HEX_SIZE(long) + 3];
73 BIO_snprintf(tmphex, sizeof tmphex, "\\W%08lX", c);
74 if (!io_ch(arg, tmphex, 10))
79 BIO_snprintf(tmphex, sizeof tmphex, "\\U%04lX", c);
80 if (!io_ch(arg, tmphex, 6))
84 chtmp = (unsigned char)c;
86 chflgs = flags & ASN1_STRFLGS_ESC_MSB;
88 chflgs = char_type[chtmp] & flags;
89 if (chflgs & CHARTYPE_BS_ESC) {
90 /* If we don't escape with quotes, signal we need quotes */
91 if (chflgs & ASN1_STRFLGS_ESC_QUOTE) {
94 if (!io_ch(arg, &chtmp, 1))
98 if (!io_ch(arg, "\\", 1))
100 if (!io_ch(arg, &chtmp, 1))
104 if (chflgs & (ASN1_STRFLGS_ESC_CTRL | ASN1_STRFLGS_ESC_MSB)) {
105 BIO_snprintf(tmphex, 11, "\\%02X", chtmp);
106 if (!io_ch(arg, tmphex, 3))
111 * If we get this far and do any escaping at all must escape the escape
112 * character itself: backslash.
114 if (chtmp == '\\' && flags & ESC_FLAGS) {
115 if (!io_ch(arg, "\\\\", 2))
119 if (!io_ch(arg, &chtmp, 1))
124 #define BUF_TYPE_WIDTH_MASK 0x7
125 #define BUF_TYPE_CONVUTF8 0x8
128 * This function sends each character in a buffer to do_esc_char(). It
129 * interprets the content formats and converts to or from UTF8 as
133 static int do_buf(unsigned char *buf, int buflen,
134 int type, unsigned char flags, char *quotes, char_io *io_ch,
138 unsigned char orflags, *p, *q;
144 if (p == buf && flags & ASN1_STRFLGS_ESC_2253)
145 orflags = CHARTYPE_FIRST_ESC_2253;
148 switch (type & BUF_TYPE_WIDTH_MASK) {
150 c = ((unsigned long)*p++) << 24;
151 c |= ((unsigned long)*p++) << 16;
152 c |= ((unsigned long)*p++) << 8;
157 c = ((unsigned long)*p++) << 8;
166 i = UTF8_getc(p, buflen, &c);
168 return -1; /* Invalid UTF8String */
172 return -1; /* invalid width */
174 if (p == q && flags & ASN1_STRFLGS_ESC_2253)
175 orflags = CHARTYPE_LAST_ESC_2253;
176 if (type & BUF_TYPE_CONVUTF8) {
177 unsigned char utfbuf[6];
179 utflen = UTF8_putc(utfbuf, sizeof utfbuf, c);
180 for (i = 0; i < utflen; i++) {
182 * We don't need to worry about setting orflags correctly
183 * because if utflen==1 its value will be correct anyway
184 * otherwise each character will be > 0x7f and so the
185 * character will never be escaped on first and last.
188 do_esc_char(utfbuf[i], (unsigned char)(flags | orflags),
196 do_esc_char(c, (unsigned char)(flags | orflags), quotes,
206 /* This function hex dumps a buffer of characters */
208 static int do_hex_dump(char_io *io_ch, void *arg, unsigned char *buf,
211 static const char hexdig[] = "0123456789ABCDEF";
212 unsigned char *p, *q;
218 hextmp[0] = hexdig[*p >> 4];
219 hextmp[1] = hexdig[*p & 0xf];
220 if (!io_ch(arg, hextmp, 2))
229 * "dump" a string. This is done when the type is unknown, or the flags
230 * request it. We can either dump the content octets or the entire DER
231 * encoding. This uses the RFC2253 #01234 format.
234 static int do_dump(unsigned long lflags, char_io *io_ch, void *arg,
238 * Placing the ASN1_STRING in a temp ASN1_TYPE allows the DER encoding to
242 unsigned char *der_buf, *p;
245 if (!io_ch(arg, "#", 1))
247 /* If we don't dump DER encoding just dump content octets */
248 if (!(lflags & ASN1_STRFLGS_DUMP_DER)) {
249 outlen = do_hex_dump(io_ch, arg, str->data, str->length);
255 t.value.ptr = (char *)str;
256 der_len = i2d_ASN1_TYPE(&t, NULL);
257 der_buf = OPENSSL_malloc(der_len);
261 i2d_ASN1_TYPE(&t, &p);
262 outlen = do_hex_dump(io_ch, arg, der_buf, der_len);
263 OPENSSL_free(der_buf);
270 * Lookup table to convert tags to character widths, 0 = UTF8 encoded, -1 is
271 * used for non string types otherwise it is the number of bytes per
275 static const signed char tag2nbyte[] = {
276 -1, -1, -1, -1, -1, /* 0-4 */
277 -1, -1, -1, -1, -1, /* 5-9 */
278 -1, -1, 0, -1, /* 10-13 */
279 -1, -1, -1, -1, /* 15-17 */
280 -1, 1, 1, /* 18-20 */
281 -1, 1, 1, 1, /* 21-24 */
282 -1, 1, -1, /* 25-27 */
287 * This is the main function, print out an ASN1_STRING taking note of various
288 * escape and display options. Returns number of characters written or -1 if
292 static int do_print_ex(char_io *io_ch, void *arg, unsigned long lflags,
300 /* Keep a copy of escape flags */
301 flags = (unsigned char)(lflags & ESC_FLAGS);
307 if (lflags & ASN1_STRFLGS_SHOW_TYPE) {
309 tagname = ASN1_tag2str(type);
310 outlen += strlen(tagname);
311 if (!io_ch(arg, tagname, outlen) || !io_ch(arg, ":", 1))
316 /* Decide what to do with type, either dump content or display it */
318 /* Dump everything */
319 if (lflags & ASN1_STRFLGS_DUMP_ALL)
321 /* Ignore the string type */
322 else if (lflags & ASN1_STRFLGS_IGNORE_TYPE)
325 /* Else determine width based on type */
326 if ((type > 0) && (type < 31))
327 type = tag2nbyte[type];
330 if ((type == -1) && !(lflags & ASN1_STRFLGS_DUMP_UNKNOWN))
335 len = do_dump(lflags, io_ch, arg, str);
342 if (lflags & ASN1_STRFLGS_UTF8_CONVERT) {
344 * Note: if string is UTF8 and we want to convert to UTF8 then we
345 * just interpret it as 1 byte per character to avoid converting
351 type |= BUF_TYPE_CONVUTF8;
354 len = do_buf(str->data, str->length, type, flags, "es, io_ch, NULL);
362 if (quotes && !io_ch(arg, "\"", 1))
364 if (do_buf(str->data, str->length, type, flags, NULL, io_ch, arg) < 0)
366 if (quotes && !io_ch(arg, "\"", 1))
371 /* Used for line indenting: print 'indent' spaces */
373 static int do_indent(char_io *io_ch, void *arg, int indent)
376 for (i = 0; i < indent; i++)
377 if (!io_ch(arg, " ", 1))
382 #define FN_WIDTH_LN 25
383 #define FN_WIDTH_SN 10
385 static int do_name_ex(char_io *io_ch, void *arg, X509_NAME *n,
386 int indent, unsigned long flags)
388 int i, prev = -1, orflags, cnt;
392 X509_NAME_ENTRY *ent;
396 char *sep_dn, *sep_mv, *sep_eq;
397 int sep_dn_len, sep_mv_len, sep_eq_len;
401 if (!do_indent(io_ch, arg, indent))
403 switch (flags & XN_FLAG_SEP_MASK) {
404 case XN_FLAG_SEP_MULTILINE:
411 case XN_FLAG_SEP_COMMA_PLUS:
419 case XN_FLAG_SEP_CPLUS_SPC:
427 case XN_FLAG_SEP_SPLUS_SPC:
439 if (flags & XN_FLAG_SPC_EQ) {
447 fn_opt = flags & XN_FLAG_FN_MASK;
449 cnt = X509_NAME_entry_count(n);
450 for (i = 0; i < cnt; i++) {
451 if (flags & XN_FLAG_DN_REV)
452 ent = X509_NAME_get_entry(n, cnt - i - 1);
454 ent = X509_NAME_get_entry(n, i);
456 if (prev == X509_NAME_ENTRY_set(ent)) {
457 if (!io_ch(arg, sep_mv, sep_mv_len))
459 outlen += sep_mv_len;
461 if (!io_ch(arg, sep_dn, sep_dn_len))
463 outlen += sep_dn_len;
464 if (!do_indent(io_ch, arg, indent))
469 prev = X509_NAME_ENTRY_set(ent);
470 fn = X509_NAME_ENTRY_get_object(ent);
471 val = X509_NAME_ENTRY_get_data(ent);
472 fn_nid = OBJ_obj2nid(fn);
473 if (fn_opt != XN_FLAG_FN_NONE) {
475 if ((fn_opt == XN_FLAG_FN_OID) || (fn_nid == NID_undef)) {
476 OBJ_obj2txt(objtmp, sizeof objtmp, fn, 1);
477 fld_len = 0; /* XXX: what should this be? */
480 if (fn_opt == XN_FLAG_FN_SN) {
481 fld_len = FN_WIDTH_SN;
482 objbuf = OBJ_nid2sn(fn_nid);
483 } else if (fn_opt == XN_FLAG_FN_LN) {
484 fld_len = FN_WIDTH_LN;
485 objbuf = OBJ_nid2ln(fn_nid);
487 fld_len = 0; /* XXX: what should this be? */
491 objlen = strlen(objbuf);
492 if (!io_ch(arg, objbuf, objlen))
494 if ((objlen < fld_len) && (flags & XN_FLAG_FN_ALIGN)) {
495 if (!do_indent(io_ch, arg, fld_len - objlen))
497 outlen += fld_len - objlen;
499 if (!io_ch(arg, sep_eq, sep_eq_len))
501 outlen += objlen + sep_eq_len;
504 * If the field name is unknown then fix up the DER dump flag. We
505 * might want to limit this further so it will DER dump on anything
506 * other than a few 'standard' fields.
508 if ((fn_nid == NID_undef) && (flags & XN_FLAG_DUMP_UNKNOWN_FIELDS))
509 orflags = ASN1_STRFLGS_DUMP_ALL;
513 len = do_print_ex(io_ch, arg, flags | orflags, val);
521 /* Wrappers round the main functions */
523 int X509_NAME_print_ex(BIO *out, X509_NAME *nm, int indent,
526 if (flags == XN_FLAG_COMPAT)
527 return X509_NAME_print(out, nm, indent);
528 return do_name_ex(send_bio_chars, out, nm, indent, flags);
531 #ifndef OPENSSL_NO_STDIO
532 int X509_NAME_print_ex_fp(FILE *fp, X509_NAME *nm, int indent,
535 if (flags == XN_FLAG_COMPAT) {
538 btmp = BIO_new_fp(fp, BIO_NOCLOSE);
541 ret = X509_NAME_print(btmp, nm, indent);
545 return do_name_ex(send_fp_chars, fp, nm, indent, flags);
549 int ASN1_STRING_print_ex(BIO *out, ASN1_STRING *str, unsigned long flags)
551 return do_print_ex(send_bio_chars, out, flags, str);
554 #ifndef OPENSSL_NO_STDIO
555 int ASN1_STRING_print_ex_fp(FILE *fp, ASN1_STRING *str, unsigned long flags)
557 return do_print_ex(send_fp_chars, fp, flags, str);
562 * Utility function: convert any string type to UTF8, returns number of bytes
563 * in output string or a negative error code
566 int ASN1_STRING_to_UTF8(unsigned char **out, ASN1_STRING *in)
568 ASN1_STRING stmp, *str = &stmp;
569 int mbflag, type, ret;
573 if ((type < 0) || (type > 30))
575 mbflag = tag2nbyte[type];
578 mbflag |= MBSTRING_FLAG;
583 ASN1_mbstring_copy(&str, in->data, in->length, mbflag,