/usr/include/pjlib-util/sha1.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_SHA1_H__
#define __PJLIB_UTIL_SHA1_H__
/**
* @file sha1.h
* @brief SHA1 encryption implementation
*/
#include <pj/types.h>
PJ_BEGIN_DECL
/**
* @defgroup PJLIB_UTIL_SHA1 SHA1
* @ingroup PJLIB_UTIL_ENCRYPTION
* @{
*/
/** SHA1 context */
typedef struct pj_sha1_context
{
pj_uint32_t state[5]; /**< State */
pj_uint32_t count[2]; /**< Count */
pj_uint8_t buffer[64]; /**< Buffer */
} pj_sha1_context;
/** SHA1 digest size is 20 bytes */
#define PJ_SHA1_DIGEST_SIZE 20
/** Initialize the algorithm.
* @param ctx SHA1 context.
*/
PJ_DECL(void) pj_sha1_init(pj_sha1_context *ctx);
/** Append a stream to the message.
* @param ctx SHA1 context.
* @param data Data.
* @param nbytes Length of data.
*/
PJ_DECL(void) pj_sha1_update(pj_sha1_context *ctx,
const pj_uint8_t *data,
const pj_size_t nbytes);
/** Finish the message and return the digest.
* @param ctx SHA1 context.
* @param digest 16 byte digest.
*/
PJ_DECL(void) pj_sha1_final(pj_sha1_context *ctx,
pj_uint8_t digest[PJ_SHA1_DIGEST_SIZE]);
/**
* @}
*/
PJ_END_DECL
#endif /* __PJLIB_UTIL_SHA1_H__ */
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