sha1.cpp revision c40afa339b10a23d6fffcbeb7d4572bb494685f0
/* $Id$ */
/** @file
* IPRT - SHA1 digest creation
*/
/*
* Copyright (C) 2009 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
#include <iprt/sha1.h>
#include <iprt/stream.h>
#include <iprt/string.h>
#include <iprt/assert.h>
#include <iprt/err.h>
#include <openssl/sha.h>
/*******************************************************************************
* Public RTSHA1Digest interface *
*******************************************************************************/
RTR3DECL(int) RTSHA1Digest(const char *pszFile, char **ppszDigest)
{
/* Validate input */
if (!pszFile || !ppszDigest)
{
AssertMsgFailed(("Must supply pszFile and ppszDigest!\n"));
return VERR_INVALID_PARAMETER;
}
*ppszDigest = NULL;
/* Initialize OpenSSL */
SHA_CTX ctx;
if (!SHA1_Init(&ctx))
return VERR_INTERNAL_ERROR;
/* Open the file to calculate a SHA1 sum of */
PRTSTREAM pStream;
int rc = RTStrmOpen(pszFile, "r+b", &pStream);
if (RT_FAILURE(rc))
return rc;
/* Read that file in blocks */
void *pvBuf[4096];
size_t cbRead;
do
{
cbRead = 0;
rc = RTStrmReadEx(pStream, pvBuf, 4096, &cbRead);
if (RT_FAILURE(rc))
break;
if(!SHA1_Update(&ctx, pvBuf, cbRead))
{
rc = VERR_INTERNAL_ERROR;
break;
}
}
while (cbRead > 0);
RTStrmClose(pStream);
if (RT_FAILURE(rc))
return rc;
/* Finally calculate & format the SHA1 sum */
unsigned char pucDig[20];
if (!SHA1_Final(pucDig, &ctx))
return VERR_INTERNAL_ERROR;
int cbRet = RTStrAPrintf(ppszDigest, "%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x",
pucDig[0] , pucDig[1] , pucDig[2] , pucDig[3] , pucDig[4],
pucDig[5] , pucDig[6] , pucDig[7] , pucDig[8] , pucDig[9],
pucDig[10], pucDig[11], pucDig[12], pucDig[13], pucDig[14],
pucDig[15], pucDig[16], pucDig[17], pucDig[18], pucDig[19]);
if (cbRet == -1)
rc = VERR_INTERNAL_ERROR;
return rc;
}