576 lines
16 KiB
C
576 lines
16 KiB
C
/* a_strex.c */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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* project 2000.
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*/
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/* ====================================================================
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* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
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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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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include "cryptlib.h"
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#include <openssl/crypto.h>
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#include <openssl/x509.h>
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#include <openssl/asn1.h>
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#include "charmap.h"
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/* ASN1_STRING_print_ex() and X509_NAME_print_ex().
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* Enhanced string and name printing routines handling
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* multibyte characters, RFC2253 and a host of other
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* 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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/* Three IO functions for sending data to memory, a BIO and
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* and a FILE pointer.
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*/
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#if 0 /* never used */
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static int send_mem_chars(void *arg, const void *buf, int len)
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{
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unsigned char **out = arg;
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if(!out) return 1;
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memcpy(*out, buf, len);
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*out += len;
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return 1;
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}
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#endif
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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) return 1;
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if(BIO_write(arg, buf, len) != len) 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) return 1;
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if(fwrite(buf, 1, len, arg) != (unsigned int)len) 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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/* This function handles display of
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* strings, one character at a time.
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* It is passed an unsigned long for each
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* character because it could come from 2 or even
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* 4 byte forms.
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*/
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static int do_esc_char(unsigned long c, unsigned char flags, char *do_quotes, 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(long)+3];
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if(c > 0xffffffffL)
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return -1;
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if(c > 0xffff) {
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BIO_snprintf(tmphex, sizeof tmphex, "\\W%08lX", c);
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if(!io_ch(arg, tmphex, 10)) 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%04lX", c);
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if(!io_ch(arg, tmphex, 6)) 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) chflgs = flags & ASN1_STRFLGS_ESC_MSB;
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else 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) *do_quotes = 1;
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if(!io_ch(arg, &chtmp, 1)) return -1;
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return 1;
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}
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if(!io_ch(arg, "\\", 1)) return -1;
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if(!io_ch(arg, &chtmp, 1)) 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)) return -1;
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return 3;
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}
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/* If we get this far and do any escaping at all must escape
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* the escape 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)) return -1;
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return 2;
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}
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if(!io_ch(arg, &chtmp, 1)) 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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/* This function sends each character in a buffer to
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* do_esc_char(). It interprets the content formats
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* and converts to or from UTF8 as 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, void *arg)
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{
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int i, outlen, len;
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unsigned char orflags, *p, *q;
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unsigned long c;
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p = buf;
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q = buf + buflen;
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outlen = 0;
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while(p != q) {
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if(p == buf && flags & ASN1_STRFLGS_ESC_2253) orflags = CHARTYPE_FIRST_ESC_2253;
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else orflags = 0;
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switch(type & BUF_TYPE_WIDTH_MASK) {
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case 4:
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c = ((unsigned long)*p++) << 24;
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c |= ((unsigned long)*p++) << 16;
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c |= ((unsigned long)*p++) << 8;
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c |= *p++;
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break;
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case 2:
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c = ((unsigned long)*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) return -1; /* Invalid UTF8String */
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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) 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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/* 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 = do_esc_char(utfbuf[i], (unsigned char)(flags | orflags), quotes, io_ch, arg);
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if(len < 0) return -1;
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outlen += len;
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}
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} else {
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len = do_esc_char(c, (unsigned char)(flags | orflags), quotes, io_ch, arg);
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if(len < 0) 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, 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)) 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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/* "dump" a string. This is done when the type is unknown,
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* or the flags request it. We can either dump the content
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* octets or the entire DER encoding. This uses the RFC2253
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* #01234 format.
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*/
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static int do_dump(unsigned long lflags, char_io *io_ch, void *arg, ASN1_STRING *str)
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{
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/* Placing the ASN1_STRING in a temp ASN1_TYPE allows
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* the DER encoding to 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)) 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) 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) 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) return -1;
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return outlen + 1;
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}
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/* Lookup table to convert tags to character widths,
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* 0 = UTF8 encoded, -1 is used for non string types
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* otherwise it is the number of bytes per 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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/* This is the main function, print out an
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* ASN1_STRING taking note of various escape
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* and display options. Returns number of
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* characters written or -1 if an error
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* occurred.
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*/
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static int do_print_ex(char_io *io_ch, void *arg, unsigned long lflags, 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)) 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) type = -1;
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/* Ignore the string type */
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else if(lflags & ASN1_STRFLGS_IGNORE_TYPE) 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)) type = tag2nbyte[type];
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else type = -1;
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if((type == -1) && !(lflags & ASN1_STRFLGS_DUMP_UNKNOWN)) 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) 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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/* Note: if string is UTF8 and we want
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* to convert to UTF8 then we just interpret
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* it as 1 byte per character to avoid converting
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* twice.
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*/
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if(!type) type = 1;
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else 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) return -1;
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outlen += len;
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if(quotes) outlen += 2;
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if(!arg) return outlen;
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if(quotes && !io_ch(arg, "\"", 1)) 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)) 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)) 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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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) indent = 0;
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outlen = indent;
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if(!do_indent(io_ch, arg, indent)) return -1;
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switch (flags & XN_FLAG_SEP_MASK)
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{
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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;
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cnt = X509_NAME_entry_count(n);
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for(i = 0; i < cnt; i++) {
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if(flags & XN_FLAG_DN_REV)
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ent = X509_NAME_get_entry(n, cnt - i - 1);
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else ent = X509_NAME_get_entry(n, i);
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if(prev != -1) {
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if(prev == ent->set) {
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if(!io_ch(arg, sep_mv, sep_mv_len)) return -1;
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outlen += sep_mv_len;
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} else {
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if(!io_ch(arg, sep_dn, sep_dn_len)) return -1;
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outlen += sep_dn_len;
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if(!do_indent(io_ch, arg, indent)) return -1;
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outlen += indent;
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}
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}
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prev = ent->set;
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fn = X509_NAME_ENTRY_get_object(ent);
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val = X509_NAME_ENTRY_get_data(ent);
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fn_nid = OBJ_obj2nid(fn);
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if(fn_opt != XN_FLAG_FN_NONE) {
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int objlen, fld_len;
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if((fn_opt == XN_FLAG_FN_OID) || (fn_nid==NID_undef) ) {
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OBJ_obj2txt(objtmp, sizeof objtmp, fn, 1);
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fld_len = 0; /* XXX: what should this be? */
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objbuf = objtmp;
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} else {
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if(fn_opt == XN_FLAG_FN_SN) {
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fld_len = FN_WIDTH_SN;
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objbuf = OBJ_nid2sn(fn_nid);
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} else if(fn_opt == XN_FLAG_FN_LN) {
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fld_len = FN_WIDTH_LN;
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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;
|
|
}
|