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626 lines
17 KiB
C
626 lines
17 KiB
C
/*
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* Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <string.h>
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#include "internal/cryptlib.h"
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#include "internal/asn1_int.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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/*
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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_2254 | \
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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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/*
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* Three IO functions for sending data to memory, a BIO and and a FILE
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* pointer.
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*/
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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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#ifndef OPENSSL_NO_STDIO
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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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#endif
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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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static int do_esc_char(unsigned long c, unsigned short flags, char *do_quotes,
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char_io *io_ch, void *arg)
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{
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unsigned short chflgs;
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unsigned char 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))
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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%04lX", 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
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| ASN1_STRFLGS_ESC_MSB
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| ASN1_STRFLGS_ESC_2254)) {
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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 short 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 short orflags;
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unsigned char *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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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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ASN1err(ASN1_F_DO_BUF, ASN1_R_INVALID_UNIVERSALSTRING_LENGTH);
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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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ASN1err(ASN1_F_DO_BUF, ASN1_R_INVALID_BMPSTRING_LENGTH);
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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 = ((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)
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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 = do_esc_char(utfbuf[i], 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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} else {
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len = do_esc_char(c, 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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const 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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if ((der_buf = OPENSSL_malloc(der_len)) == NULL) {
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ASN1err(ASN1_F_DO_DUMP, ERR_R_MALLOC_FAILURE);
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return -1;
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}
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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, /* 10-11 */
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0, /* 12 V_ASN1_UTF8STRING */
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-1, -1, -1, -1, -1, /* 13-17 */
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1, /* 18 V_ASN1_NUMERICSTRING */
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1, /* 19 V_ASN1_PRINTABLESTRING */
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1, /* 20 V_ASN1_T61STRING */
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-1, /* 21 */
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1, /* 22 V_ASN1_IA5STRING */
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1, /* 23 V_ASN1_UTCTIME */
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1, /* 24 V_ASN1_GENERALIZEDTIME */
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-1, /* 25 */
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1, /* 26 V_ASN1_ISO64STRING */
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-1, /* 27 */
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4, /* 28 V_ASN1_UNIVERSALSTRING */
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-1, /* 29 */
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2 /* 30 V_ASN1_BMPSTRING */
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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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const 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 short flags;
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quotes = 0;
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/* Keep a copy of escape flags */
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flags = (unsigned short)(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, const 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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const ASN1_STRING *val;
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const 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)
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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;
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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
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ent = X509_NAME_get_entry(n, i);
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if (prev != -1) {
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if (prev == X509_NAME_ENTRY_set(ent)) {
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if (!io_ch(arg, sep_mv, sep_mv_len))
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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))
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return -1;
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outlen += sep_dn_len;
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if (!do_indent(io_ch, arg, indent))
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return -1;
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outlen += indent;
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}
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}
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prev = X509_NAME_ENTRY_set(ent);
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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 {
|
|
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, const 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_STDIO
|
|
int X509_NAME_print_ex_fp(FILE *fp, const 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, const ASN1_STRING *str, unsigned long flags)
|
|
{
|
|
return do_print_ex(send_bio_chars, out, flags, str);
|
|
}
|
|
|
|
#ifndef OPENSSL_NO_STDIO
|
|
int ASN1_STRING_print_ex_fp(FILE *fp, const 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, const 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;
|
|
}
|