mirror of https://github.com/sudo-project/sudo.git
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/*
|
|
* SPDX-License-Identifier: ISC
|
|
*
|
|
* Copyright (c) 2013-2018 Todd C. Miller <Todd.Miller@sudo.ws>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
/*
|
|
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
|
|
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <sudoers.h>
|
|
|
|
static const unsigned char base64enc_tab[64] =
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
size_t
|
|
base64_encode(const unsigned char * restrict in, size_t in_len, char * restrict out, size_t out_len)
|
|
{
|
|
size_t ii, io;
|
|
unsigned int rem, v;
|
|
debug_decl(base64_encode, SUDOERS_DEBUG_MATCH);
|
|
|
|
for (io = 0, ii = 0, v = 0, rem = 0; ii < in_len; ii++) {
|
|
unsigned char ch = in[ii];
|
|
v = (v << 8) | ch;
|
|
rem += 8;
|
|
while (rem >= 6) {
|
|
rem -= 6;
|
|
if (io >= out_len)
|
|
debug_return_size_t((size_t)-1); /* truncation is failure */
|
|
out[io++] = (char)base64enc_tab[(v >> rem) & 63];
|
|
}
|
|
}
|
|
if (rem != 0) {
|
|
v <<= (6 - rem);
|
|
if (io >= out_len)
|
|
debug_return_size_t((size_t)-1); /* truncation is failure */
|
|
out[io++] = (char)base64enc_tab[v&63];
|
|
}
|
|
while (io & 3) {
|
|
if (io >= out_len)
|
|
debug_return_size_t((size_t)-1); /* truncation is failure */
|
|
out[io++] = '=';
|
|
}
|
|
if (io >= out_len)
|
|
debug_return_size_t((size_t)-1); /* no room for NUL terminator */
|
|
out[io] = '\0';
|
|
debug_return_size_t(io);
|
|
}
|