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653 lines
19 KiB
C
653 lines
19 KiB
C
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.] */
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#include <openssl/x509.h>
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#include <inttypes.h>
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#include <string.h>
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#include <openssl/asn1.h>
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#include <openssl/mem.h>
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#include <openssl/obj.h>
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#include "charmap.h"
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#include "../asn1/asn1_locl.h"
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/*
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* ASN1_STRING_print_ex() and X509_NAME_print_ex(). Enhanced string and name
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* printing routines handling multibyte characters, RFC2253 and a host of
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* other options.
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*/
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#define CHARTYPE_BS_ESC (ASN1_STRFLGS_ESC_2253 | CHARTYPE_FIRST_ESC_2253 | CHARTYPE_LAST_ESC_2253)
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#define ESC_FLAGS (ASN1_STRFLGS_ESC_2253 | \
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ASN1_STRFLGS_ESC_QUOTE | \
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ASN1_STRFLGS_ESC_CTRL | \
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ASN1_STRFLGS_ESC_MSB)
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static int send_bio_chars(void *arg, const void *buf, int len)
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{
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if (!arg)
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return 1;
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if (BIO_write(arg, buf, len) != len)
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return 0;
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return 1;
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}
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static int send_fp_chars(void *arg, const void *buf, int len)
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{
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if (!arg)
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return 1;
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if (fwrite(buf, 1, len, arg) != (unsigned int)len)
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return 0;
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return 1;
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}
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typedef int char_io (void *arg, const void *buf, int len);
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/*
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* This function handles display of strings, one character at a time. It is
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* passed an unsigned long for each character because it could come from 2 or
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* even 4 byte forms.
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*/
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#define HEX_SIZE(type) (sizeof(type)*2)
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static int do_esc_char(uint32_t c, unsigned char flags, char *do_quotes,
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char_io *io_ch, void *arg)
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{
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unsigned char chflgs, chtmp;
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char tmphex[HEX_SIZE(uint32_t) + 3];
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if (c > 0xffff) {
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BIO_snprintf(tmphex, sizeof tmphex, "\\W%08" PRIX32, c);
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if (!io_ch(arg, tmphex, 10))
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return -1;
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return 10;
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}
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if (c > 0xff) {
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BIO_snprintf(tmphex, sizeof tmphex, "\\U%04" PRIX32, c);
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if (!io_ch(arg, tmphex, 6))
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return -1;
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return 6;
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}
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chtmp = (unsigned char)c;
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if (chtmp > 0x7f)
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chflgs = flags & ASN1_STRFLGS_ESC_MSB;
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else
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chflgs = char_type[chtmp] & flags;
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if (chflgs & CHARTYPE_BS_ESC) {
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/* If we don't escape with quotes, signal we need quotes */
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if (chflgs & ASN1_STRFLGS_ESC_QUOTE) {
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if (do_quotes)
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*do_quotes = 1;
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if (!io_ch(arg, &chtmp, 1))
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return -1;
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return 1;
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}
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if (!io_ch(arg, "\\", 1))
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return -1;
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if (!io_ch(arg, &chtmp, 1))
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return -1;
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return 2;
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}
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if (chflgs & (ASN1_STRFLGS_ESC_CTRL | ASN1_STRFLGS_ESC_MSB)) {
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BIO_snprintf(tmphex, 11, "\\%02X", chtmp);
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if (!io_ch(arg, tmphex, 3))
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return -1;
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return 3;
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}
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/*
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* If we get this far and do any escaping at all must escape the escape
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* character itself: backslash.
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*/
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if (chtmp == '\\' && flags & ESC_FLAGS) {
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if (!io_ch(arg, "\\\\", 2))
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return -1;
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return 2;
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}
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if (!io_ch(arg, &chtmp, 1))
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return -1;
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return 1;
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}
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#define BUF_TYPE_WIDTH_MASK 0x7
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#define BUF_TYPE_CONVUTF8 0x8
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/*
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* This function sends each character in a buffer to do_esc_char(). It
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* interprets the content formats and converts to or from UTF8 as
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* appropriate.
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*/
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static int do_buf(unsigned char *buf, int buflen,
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int type, unsigned char flags, char *quotes, char_io *io_ch,
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void *arg)
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{
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int i, outlen, len, charwidth;
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unsigned char orflags, *p, *q;
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uint32_t c;
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p = buf;
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q = buf + buflen;
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outlen = 0;
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charwidth = type & BUF_TYPE_WIDTH_MASK;
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switch (charwidth) {
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case 4:
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if (buflen & 3) {
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OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_UNIVERSALSTRING);
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return -1;
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}
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break;
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case 2:
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if (buflen & 1) {
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OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_BMPSTRING);
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return -1;
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}
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break;
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default:
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break;
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}
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while (p != q) {
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if (p == buf && flags & ASN1_STRFLGS_ESC_2253)
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orflags = CHARTYPE_FIRST_ESC_2253;
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else
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orflags = 0;
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switch (charwidth) {
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case 4:
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c = ((uint32_t)*p++) << 24;
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c |= ((uint32_t)*p++) << 16;
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c |= ((uint32_t)*p++) << 8;
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c |= *p++;
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break;
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case 2:
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c = ((uint32_t)*p++) << 8;
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c |= *p++;
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break;
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case 1:
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c = *p++;
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break;
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case 0:
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i = UTF8_getc(p, buflen, &c);
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if (i < 0)
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return -1; /* Invalid UTF8String */
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buflen -= i;
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p += i;
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break;
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default:
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return -1; /* invalid width */
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}
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if (p == q && flags & ASN1_STRFLGS_ESC_2253)
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orflags = CHARTYPE_LAST_ESC_2253;
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if (type & BUF_TYPE_CONVUTF8) {
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unsigned char utfbuf[6];
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int utflen;
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utflen = UTF8_putc(utfbuf, sizeof utfbuf, c);
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for (i = 0; i < utflen; i++) {
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/*
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* We don't need to worry about setting orflags correctly
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* because if utflen==1 its value will be correct anyway
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* otherwise each character will be > 0x7f and so the
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* character will never be escaped on first and last.
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*/
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len =
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do_esc_char(utfbuf[i], (unsigned char)(flags | orflags),
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quotes, io_ch, arg);
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if (len < 0)
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return -1;
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outlen += len;
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}
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} else {
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len =
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do_esc_char(c, (unsigned char)(flags | orflags), quotes,
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io_ch, arg);
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if (len < 0)
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return -1;
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outlen += len;
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}
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}
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return outlen;
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}
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/* This function hex dumps a buffer of characters */
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static int do_hex_dump(char_io *io_ch, void *arg, unsigned char *buf,
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int buflen)
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{
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static const char hexdig[] = "0123456789ABCDEF";
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unsigned char *p, *q;
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char hextmp[2];
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if (arg) {
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p = buf;
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q = buf + buflen;
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while (p != q) {
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hextmp[0] = hexdig[*p >> 4];
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hextmp[1] = hexdig[*p & 0xf];
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if (!io_ch(arg, hextmp, 2))
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return -1;
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p++;
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}
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}
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return buflen << 1;
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}
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/*
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* "dump" a string. This is done when the type is unknown, or the flags
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* request it. We can either dump the content octets or the entire DER
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* encoding. This uses the RFC2253 #01234 format.
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*/
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static int do_dump(unsigned long lflags, char_io *io_ch, void *arg,
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ASN1_STRING *str)
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{
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/*
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* Placing the ASN1_STRING in a temp ASN1_TYPE allows the DER encoding to
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* readily obtained
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*/
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ASN1_TYPE t;
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unsigned char *der_buf, *p;
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int outlen, der_len;
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if (!io_ch(arg, "#", 1))
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return -1;
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/* If we don't dump DER encoding just dump content octets */
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if (!(lflags & ASN1_STRFLGS_DUMP_DER)) {
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outlen = do_hex_dump(io_ch, arg, str->data, str->length);
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if (outlen < 0)
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return -1;
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return outlen + 1;
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}
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t.type = str->type;
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t.value.ptr = (char *)str;
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der_len = i2d_ASN1_TYPE(&t, NULL);
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der_buf = OPENSSL_malloc(der_len);
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if (!der_buf)
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return -1;
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p = der_buf;
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i2d_ASN1_TYPE(&t, &p);
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outlen = do_hex_dump(io_ch, arg, der_buf, der_len);
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OPENSSL_free(der_buf);
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if (outlen < 0)
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return -1;
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return outlen + 1;
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}
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/*
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* Lookup table to convert tags to character widths, 0 = UTF8 encoded, -1 is
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* used for non string types otherwise it is the number of bytes per
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* character
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*/
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static const signed char tag2nbyte[] = {
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-1, -1, -1, -1, -1, /* 0-4 */
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-1, -1, -1, -1, -1, /* 5-9 */
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-1, -1, 0, -1, /* 10-13 */
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-1, -1, -1, -1, /* 15-17 */
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1, 1, 1, /* 18-20 */
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-1, 1, 1, 1, /* 21-24 */
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-1, 1, -1, /* 25-27 */
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4, -1, 2 /* 28-30 */
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};
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/*
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* This is the main function, print out an ASN1_STRING taking note of various
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* escape and display options. Returns number of characters written or -1 if
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* an error occurred.
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*/
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static int do_print_ex(char_io *io_ch, void *arg, unsigned long lflags,
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ASN1_STRING *str)
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{
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int outlen, len;
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int type;
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char quotes;
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unsigned char flags;
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quotes = 0;
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/* Keep a copy of escape flags */
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flags = (unsigned char)(lflags & ESC_FLAGS);
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type = str->type;
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outlen = 0;
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if (lflags & ASN1_STRFLGS_SHOW_TYPE) {
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const char *tagname;
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tagname = ASN1_tag2str(type);
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outlen += strlen(tagname);
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if (!io_ch(arg, tagname, outlen) || !io_ch(arg, ":", 1))
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return -1;
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outlen++;
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}
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/* Decide what to do with type, either dump content or display it */
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/* Dump everything */
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if (lflags & ASN1_STRFLGS_DUMP_ALL)
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type = -1;
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/* Ignore the string type */
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else if (lflags & ASN1_STRFLGS_IGNORE_TYPE)
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type = 1;
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else {
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/* Else determine width based on type */
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if ((type > 0) && (type < 31))
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type = tag2nbyte[type];
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else
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type = -1;
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if ((type == -1) && !(lflags & ASN1_STRFLGS_DUMP_UNKNOWN))
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type = 1;
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}
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if (type == -1) {
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len = do_dump(lflags, io_ch, arg, str);
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if (len < 0)
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return -1;
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outlen += len;
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return outlen;
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}
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if (lflags & ASN1_STRFLGS_UTF8_CONVERT) {
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/*
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* Note: if string is UTF8 and we want to convert to UTF8 then we
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* just interpret it as 1 byte per character to avoid converting
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* twice.
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*/
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if (!type)
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type = 1;
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else
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type |= BUF_TYPE_CONVUTF8;
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}
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len = do_buf(str->data, str->length, type, flags, "es, io_ch, NULL);
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if (len < 0)
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return -1;
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outlen += len;
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if (quotes)
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outlen += 2;
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if (!arg)
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return outlen;
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if (quotes && !io_ch(arg, "\"", 1))
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return -1;
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if (do_buf(str->data, str->length, type, flags, NULL, io_ch, arg) < 0)
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return -1;
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if (quotes && !io_ch(arg, "\"", 1))
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return -1;
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return outlen;
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}
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/* Used for line indenting: print 'indent' spaces */
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static int do_indent(char_io *io_ch, void *arg, int indent)
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{
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int i;
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for (i = 0; i < indent; i++)
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if (!io_ch(arg, " ", 1))
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return 0;
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return 1;
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}
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#define FN_WIDTH_LN 25
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#define FN_WIDTH_SN 10
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static int do_name_ex(char_io *io_ch, void *arg, X509_NAME *n,
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int indent, unsigned long flags)
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{
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int i, prev = -1, orflags, cnt;
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int fn_opt, fn_nid;
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ASN1_OBJECT *fn;
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ASN1_STRING *val;
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X509_NAME_ENTRY *ent;
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char objtmp[80];
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const char *objbuf;
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int outlen, len;
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const char *sep_dn, *sep_mv, *sep_eq;
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int sep_dn_len, sep_mv_len, sep_eq_len;
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if (indent < 0)
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indent = 0;
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outlen = indent;
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if (!do_indent(io_ch, arg, indent))
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return -1;
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switch (flags & XN_FLAG_SEP_MASK) {
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case XN_FLAG_SEP_MULTILINE:
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sep_dn = "\n";
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sep_dn_len = 1;
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sep_mv = " + ";
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sep_mv_len = 3;
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break;
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case XN_FLAG_SEP_COMMA_PLUS:
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sep_dn = ",";
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sep_dn_len = 1;
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sep_mv = "+";
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sep_mv_len = 1;
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indent = 0;
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break;
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case XN_FLAG_SEP_CPLUS_SPC:
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sep_dn = ", ";
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sep_dn_len = 2;
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sep_mv = " + ";
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sep_mv_len = 3;
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indent = 0;
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break;
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case XN_FLAG_SEP_SPLUS_SPC:
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sep_dn = "; ";
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sep_dn_len = 2;
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sep_mv = " + ";
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sep_mv_len = 3;
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indent = 0;
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break;
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default:
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return -1;
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}
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if (flags & XN_FLAG_SPC_EQ) {
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sep_eq = " = ";
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sep_eq_len = 3;
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} else {
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sep_eq = "=";
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sep_eq_len = 1;
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}
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fn_opt = flags & XN_FLAG_FN_MASK;
|
|
|
|
cnt = X509_NAME_entry_count(n);
|
|
for (i = 0; i < cnt; i++) {
|
|
if (flags & XN_FLAG_DN_REV)
|
|
ent = X509_NAME_get_entry(n, cnt - i - 1);
|
|
else
|
|
ent = X509_NAME_get_entry(n, i);
|
|
if (prev != -1) {
|
|
if (prev == ent->set) {
|
|
if (!io_ch(arg, sep_mv, sep_mv_len))
|
|
return -1;
|
|
outlen += sep_mv_len;
|
|
} else {
|
|
if (!io_ch(arg, sep_dn, sep_dn_len))
|
|
return -1;
|
|
outlen += sep_dn_len;
|
|
if (!do_indent(io_ch, arg, indent))
|
|
return -1;
|
|
outlen += indent;
|
|
}
|
|
}
|
|
prev = ent->set;
|
|
fn = X509_NAME_ENTRY_get_object(ent);
|
|
val = X509_NAME_ENTRY_get_data(ent);
|
|
fn_nid = OBJ_obj2nid(fn);
|
|
if (fn_opt != XN_FLAG_FN_NONE) {
|
|
int objlen, fld_len;
|
|
if ((fn_opt == XN_FLAG_FN_OID) || (fn_nid == NID_undef)) {
|
|
OBJ_obj2txt(objtmp, sizeof objtmp, fn, 1);
|
|
fld_len = 0; /* XXX: what should this be? */
|
|
objbuf = objtmp;
|
|
} else {
|
|
if (fn_opt == XN_FLAG_FN_SN) {
|
|
fld_len = FN_WIDTH_SN;
|
|
objbuf = OBJ_nid2sn(fn_nid);
|
|
} else if (fn_opt == XN_FLAG_FN_LN) {
|
|
fld_len = FN_WIDTH_LN;
|
|
objbuf = OBJ_nid2ln(fn_nid);
|
|
} else {
|
|
fld_len = 0; /* XXX: what should this be? */
|
|
objbuf = "";
|
|
}
|
|
}
|
|
objlen = strlen(objbuf);
|
|
if (!io_ch(arg, objbuf, objlen))
|
|
return -1;
|
|
if ((objlen < fld_len) && (flags & XN_FLAG_FN_ALIGN)) {
|
|
if (!do_indent(io_ch, arg, fld_len - objlen))
|
|
return -1;
|
|
outlen += fld_len - objlen;
|
|
}
|
|
if (!io_ch(arg, sep_eq, sep_eq_len))
|
|
return -1;
|
|
outlen += objlen + sep_eq_len;
|
|
}
|
|
/*
|
|
* If the field name is unknown then fix up the DER dump flag. We
|
|
* might want to limit this further so it will DER dump on anything
|
|
* other than a few 'standard' fields.
|
|
*/
|
|
if ((fn_nid == NID_undef) && (flags & XN_FLAG_DUMP_UNKNOWN_FIELDS))
|
|
orflags = ASN1_STRFLGS_DUMP_ALL;
|
|
else
|
|
orflags = 0;
|
|
|
|
len = do_print_ex(io_ch, arg, flags | orflags, val);
|
|
if (len < 0)
|
|
return -1;
|
|
outlen += len;
|
|
}
|
|
return outlen;
|
|
}
|
|
|
|
/* Wrappers round the main functions */
|
|
|
|
int X509_NAME_print_ex(BIO *out, X509_NAME *nm, int indent,
|
|
unsigned long flags)
|
|
{
|
|
if (flags == XN_FLAG_COMPAT)
|
|
return X509_NAME_print(out, nm, indent);
|
|
return do_name_ex(send_bio_chars, out, nm, indent, flags);
|
|
}
|
|
|
|
#ifndef OPENSSL_NO_FP_API
|
|
int X509_NAME_print_ex_fp(FILE *fp, X509_NAME *nm, int indent,
|
|
unsigned long flags)
|
|
{
|
|
if (flags == XN_FLAG_COMPAT) {
|
|
BIO *btmp;
|
|
int ret;
|
|
btmp = BIO_new_fp(fp, BIO_NOCLOSE);
|
|
if (!btmp)
|
|
return -1;
|
|
ret = X509_NAME_print(btmp, nm, indent);
|
|
BIO_free(btmp);
|
|
return ret;
|
|
}
|
|
return do_name_ex(send_fp_chars, fp, nm, indent, flags);
|
|
}
|
|
#endif
|
|
|
|
int ASN1_STRING_print_ex(BIO *out, ASN1_STRING *str, unsigned long flags)
|
|
{
|
|
return do_print_ex(send_bio_chars, out, flags, str);
|
|
}
|
|
|
|
#ifndef OPENSSL_NO_FP_API
|
|
int ASN1_STRING_print_ex_fp(FILE *fp, ASN1_STRING *str, unsigned long flags)
|
|
{
|
|
return do_print_ex(send_fp_chars, fp, flags, str);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Utility function: convert any string type to UTF8, returns number of bytes
|
|
* in output string or a negative error code
|
|
*/
|
|
|
|
int ASN1_STRING_to_UTF8(unsigned char **out, ASN1_STRING *in)
|
|
{
|
|
ASN1_STRING stmp, *str = &stmp;
|
|
int mbflag, type, ret;
|
|
if (!in)
|
|
return -1;
|
|
type = in->type;
|
|
if ((type < 0) || (type > 30))
|
|
return -1;
|
|
mbflag = tag2nbyte[type];
|
|
if (mbflag == -1)
|
|
return -1;
|
|
mbflag |= MBSTRING_FLAG;
|
|
stmp.data = NULL;
|
|
stmp.length = 0;
|
|
stmp.flags = 0;
|
|
ret =
|
|
ASN1_mbstring_copy(&str, in->data, in->length, mbflag,
|
|
B_ASN1_UTF8STRING);
|
|
if (ret < 0)
|
|
return ret;
|
|
*out = stmp.data;
|
|
return stmp.length;
|
|
}
|