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/*
* Copyright (c) 2011 Collabora Ltd
*
* 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.
*
*
* CONTRIBUTORS
* Stef Walter <stef@memberwebs.com>
*/
#include "config.h"
#include "p11-kit.h"
#include "util.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
void*
xrealloc (void *memory, size_t length)
{
void *allocated = realloc (memory, length);
if (!allocated)
free (memory);
return allocated;
}
/**
* p11_kit_space_strlen:
* @string: Pointer to string block
* @max_length: Maximum length of string block
*
* In PKCS\#11 structures many strings are encoded in a strange way. The string
* is placed in a fixed length buffer and then padded with spaces.
*
* This function determines the actual length of the string. Since the string
* is not null-terminated you need to pass in the size of buffer as max_length.
* The string will never be longer than this buffer.
*
* <informalexample><programlisting>
* CK_INFO info;
* size_t length;
* ...
* length = p11_kit_space_strlen (info->libraryDescription, sizeof (info->libraryDescription));
* </programlisting></informalexample>
*
* Returns: The length of the space padded string.
*/
size_t
p11_kit_space_strlen (const unsigned char *string, size_t max_length)
{
size_t i = max_length - 1;
assert (string);
while (i > 0 && string[i] == ' ')
--i;
return i + 1;
}
/**
* p11_kit_space_strdup:
* @string: Pointer to string block
* @max_length: Maximum length of string block
*
* In PKCS\#11 structures many strings are encoded in a strange way. The string
* is placed in a fixed length buffer and then padded with spaces.
*
* This function copies the space padded string into a normal null-terminated
* string. The result is owned by the caller.
*
* <informalexample><programlisting>
* CK_INFO info;
* char *description;
* ...
* description = p11_kit_space_strdup (info->libraryDescription, sizeof (info->libraryDescription));
* </programlisting></informalexample>
*
* Returns: The newly allocated string, or %NULL if memory could not be allocated.
*/
char*
p11_kit_space_strdup (const unsigned char *string, size_t max_length)
{
size_t length;
char *result;
assert (string);
length = p11_kit_space_strlen (string, max_length);
result = malloc (length + 1);
if (!result)
return NULL;
memcpy (result, string, length);
result[length] = 0;
return result;
}
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