/usr/include/pjlib-util/base64.h is in libpjproject-dev 2.7.2~dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __PJLIB_UTIL_BASE64_H__
#define __PJLIB_UTIL_BASE64_H__
/**
* @file base64.h
* @brief Base64 encoding and decoding
*/
#include <pjlib-util/types.h>
PJ_BEGIN_DECL
/**
* @defgroup PJLIB_UTIL_BASE64 Base64 Encoding/Decoding
* @ingroup PJLIB_UTIL_ENCRYPTION
* @{
* This module implements base64 encoding and decoding.
*/
/**
* Helper macro to calculate the approximate length required for base256 to
* base64 conversion.
*/
#define PJ_BASE256_TO_BASE64_LEN(len) (len * 4 / 3 + 3)
/**
* Helper macro to calculate the approximage length required for base64 to
* base256 conversion.
*/
#define PJ_BASE64_TO_BASE256_LEN(len) (len * 3 / 4)
/**
* Encode a buffer into base64 encoding.
*
* @param input The input buffer.
* @param in_len Size of the input buffer.
* @param output Output buffer. Caller must allocate this buffer with
* the appropriate size.
* @param out_len On entry, it specifies the length of the output buffer.
* Upon return, this will be filled with the actual
* length of the output buffer.
*
* @return PJ_SUCCESS on success.
*/
PJ_DECL(pj_status_t) pj_base64_encode(const pj_uint8_t *input, int in_len,
char *output, int *out_len);
/**
* Decode base64 string.
*
* @param input Input string.
* @param out Buffer to store the output. Caller must allocate
* this buffer with the appropriate size.
* @param out_len On entry, it specifies the length of the output buffer.
* Upon return, this will be filled with the actual
* length of the output.
*/
PJ_DECL(pj_status_t) pj_base64_decode(const pj_str_t *input,
pj_uint8_t *out, int *out_len);
/**
* @}
*/
PJ_END_DECL
#endif /* __PJLIB_UTIL_BASE64_H__ */
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