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diff --git a/trust/utf8.c b/trust/utf8.c
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-/*
- * Copyright (c) 2013, Red Hat Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the
- * following disclaimer.
- * * Redistributions in binary form must reproduce the
- * above copyright notice, this list of conditions and
- * the following disclaimer in the documentation and/or
- * other materials provided with the distribution.
- * * The names of contributors to this software may not be
- * used to endorse or promote products derived from this
- * software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
- * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * Author: Stef Walter <stefw@redhat.com>
- */
-
-#include "config.h"
-
-#include "buffer.h"
-#include "debug.h"
-#include "utf8.h"
-
-#include <assert.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <string.h>
-
-/*
- * Some parts come from FreeBSD utf8.c
- *
- * Copyright (c) 2002-2004 Tim J. Robbins
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-static ssize_t
-utf8_to_uchar (const char *str,
- size_t len,
- uint32_t *uc)
-{
- int ch, i, mask, want;
- uint32_t lbound, uch;
-
- assert (str != NULL);
- assert (len > 0);
- assert (uc != NULL);
-
- if (((ch = (unsigned char)*str) & ~0x7f) == 0) {
- /* Fast path for plain ASCII characters. */
- *uc = ch;
- return 1;
- }
-
- /*
- * Determine the number of octets that make up this character
- * from the first octet, and a mask that extracts the
- * interesting bits of the first octet. We already know
- * the character is at least two bytes long.
- *
- * We also specify a lower bound for the character code to
- * detect redundant, non-"shortest form" encodings. For
- * example, the sequence C0 80 is _not_ a legal representation
- * of the null character. This enforces a 1-to-1 mapping
- * between character codes and their multibyte representations.
- */
- ch = (unsigned char)*str;
- if ((ch & 0xe0) == 0xc0) {
- mask = 0x1f;
- want = 2;
- lbound = 0x80;
- } else if ((ch & 0xf0) == 0xe0) {
- mask = 0x0f;
- want = 3;
- lbound = 0x800;
- } else if ((ch & 0xf8) == 0xf0) {
- mask = 0x07;
- want = 4;
- lbound = 0x10000;
- } else if ((ch & 0xfc) == 0xf8) {
- mask = 0x03;
- want = 5;
- lbound = 0x200000;
- } else if ((ch & 0xfe) == 0xfc) {
- mask = 0x01;
- want = 6;
- lbound = 0x4000000;
- } else {
- /*
- * Malformed input; input is not UTF-8.
- */
- return -1;
- }
-
- if (want > len) {
- /* Incomplete multibyte sequence. */
- return -1;
- }
-
- /*
- * Decode the octet sequence representing the character in chunks
- * of 6 bits, most significant first.
- */
- uch = (unsigned char)*str++ & mask;
- for (i = 1; i < want; i++) {
- if ((*str & 0xc0) != 0x80) {
- /*
- * Malformed input; bad characters in the middle
- * of a character.
- */
- return -1;
- }
- uch <<= 6;
- uch |= *str++ & 0x3f;
- }
- if (uch < lbound) {
- /*
- * Malformed input; redundant encoding.
- */
- return -1;
- }
-
- *uc = uch;
- return want;
-}
-
-static size_t
-utf8_for_uchar (uint32_t uc,
- char *str,
- size_t len)
-{
- unsigned char lead;
- int i, want;
-
- assert (str != NULL);
- assert (len >= 6);
-
- if ((uc & ~0x7f) == 0) {
- /* Fast path for plain ASCII characters. */
- *str = (char)uc;
- return 1;
- }
-
- /*
- * Determine the number of octets needed to represent this character.
- * We always output the shortest sequence possible. Also specify the
- * first few bits of the first octet, which contains the information
- * about the sequence length.
- */
- if ((uc & ~0x7ff) == 0) {
- lead = 0xc0;
- want = 2;
- } else if ((uc & ~0xffff) == 0) {
- lead = 0xe0;
- want = 3;
- } else if ((uc & ~0x1fffff) == 0) {
- lead = 0xf0;
- want = 4;
- } else if ((uc & ~0x3ffffff) == 0) {
- lead = 0xf8;
- want = 5;
- } else if ((uc & ~0x7fffffff) == 0) {
- lead = 0xfc;
- want = 6;
- } else {
- return -1;
- }
-
- assert (want <= len);
-
- /*
- * Output the octets representing the character in chunks
- * of 6 bits, least significant last. The first octet is
- * a special case because it contains the sequence length
- * information.
- */
- for (i = want - 1; i > 0; i--) {
- str[i] = (uc & 0x3f) | 0x80;
- uc >>= 6;
- }
- *str = (uc & 0xff) | lead;
- return want;
-}
-
-static ssize_t
-ucs2be_to_uchar (const unsigned char *str,
- size_t len,
- uint32_t *wc)
-{
- assert (str != NULL);
- assert (len != 0);
- assert (wc != NULL);
-
- if (len < 2)
- return -1;
-
- *wc = (str[0] << 8 | str[1]);
- return 2;
-}
-
-static ssize_t
-ucs4be_to_uchar (const unsigned char *str,
- size_t len,
- uint32_t *uc)
-{
- assert (str != NULL);
- assert (len != 0);
- assert (uc != NULL);
-
- if (len < 4)
- return -1;
-
- *uc = (str[0] << 24 | str[1] << 16 | str[2] << 8 | str[3]);
- return 4;
-}
-
-bool
-p11_utf8_validate (const char *str,
- ssize_t len)
-{
- uint32_t dummy;
- ssize_t ret;
-
- if (len < 0)
- len = strlen (str);
-
- while (len > 0) {
- ret = utf8_to_uchar (str, len, &dummy);
- if (ret < 0)
- return false;
- str += ret;
- len -= ret;
- }
-
- return true;
-}
-
-static char *
-utf8_for_convert (ssize_t (* convert) (const unsigned char *, size_t, uint32_t *),
- const unsigned char *str,
- size_t num_bytes,
- size_t *ret_len)
-{
- p11_buffer buf;
- char block[6];
- uint32_t uc;
- ssize_t ret;
-
- assert (convert);
-
- if (!p11_buffer_init_null (&buf, num_bytes))
- return_val_if_reached (NULL);
-
- while (num_bytes != 0) {
- ret = (convert) (str, num_bytes, &uc);
- if (ret < 0) {
- p11_buffer_uninit (&buf);
- return NULL;
- }
-
- str += ret;
- num_bytes -= ret;
-
- ret = utf8_for_uchar (uc, block, 6);
- if (ret < 0) {
- p11_buffer_uninit (&buf);
- return NULL;
- }
- p11_buffer_add (&buf, block, ret);
- }
-
- return_val_if_fail (p11_buffer_ok (&buf), NULL);
- return p11_buffer_steal (&buf, ret_len);
-}
-
-char *
-p11_utf8_for_ucs2be (const unsigned char *str,
- size_t num_bytes,
- size_t *ret_len)
-{
- assert (str != NULL);
- return utf8_for_convert (ucs2be_to_uchar, str, num_bytes, ret_len);
-}
-
-char *
-p11_utf8_for_ucs4be (const unsigned char *str,
- size_t num_bytes,
- size_t *ret_len)
-{
- assert (str != NULL);
- return utf8_for_convert (ucs4be_to_uchar, str, num_bytes, ret_len);
-}
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