| 1 | /* $Id: RTSha1Digest.cpp 30079 2010-06-07 14:57:44Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - SHA1 digest creation
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2009-2010 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | */
|
|---|
| 26 |
|
|---|
| 27 |
|
|---|
| 28 | /*******************************************************************************
|
|---|
| 29 | * Header Files *
|
|---|
| 30 | *******************************************************************************/
|
|---|
| 31 | #include "internal/iprt.h"
|
|---|
| 32 | #include <iprt/sha.h>
|
|---|
| 33 |
|
|---|
| 34 | #include <iprt/alloca.h>
|
|---|
| 35 | #include <iprt/assert.h>
|
|---|
| 36 | #include <iprt/mem.h>
|
|---|
| 37 | #include <iprt/string.h>
|
|---|
| 38 | #include <iprt/file.h>
|
|---|
| 39 |
|
|---|
| 40 | #include <openssl/sha.h>
|
|---|
| 41 |
|
|---|
| 42 |
|
|---|
| 43 | RTR3DECL(int) RTSha1Digest(const char *pszFile, char **ppszDigest, FNRTPROGRESS pfnProgressCallback, void *pvUser)
|
|---|
| 44 | {
|
|---|
| 45 | /* Validate input */
|
|---|
| 46 | AssertPtrReturn(pszFile, VERR_INVALID_POINTER);
|
|---|
| 47 | AssertPtrReturn(ppszDigest, VERR_INVALID_POINTER);
|
|---|
| 48 | AssertPtrNullReturn(pfnProgressCallback, VERR_INVALID_PARAMETER);
|
|---|
| 49 |
|
|---|
| 50 | *ppszDigest = NULL;
|
|---|
| 51 |
|
|---|
| 52 | /* Initialize OpenSSL. */
|
|---|
| 53 | SHA_CTX ctx;
|
|---|
| 54 | if (!SHA1_Init(&ctx))
|
|---|
| 55 | return VERR_INTERNAL_ERROR;
|
|---|
| 56 |
|
|---|
| 57 | /* Open the file to calculate a SHA1 sum of */
|
|---|
| 58 | RTFILE hFile;
|
|---|
| 59 | int rc = RTFileOpen(&hFile, pszFile, RTFILE_O_OPEN | RTFILE_O_READ | RTFILE_O_DENY_WRITE);
|
|---|
| 60 | if (RT_FAILURE(rc))
|
|---|
| 61 | return rc;
|
|---|
| 62 |
|
|---|
| 63 | /* Fetch the file size. Only needed if there is a progress callback. */
|
|---|
| 64 | double rdMulti = 0;
|
|---|
| 65 | if (pfnProgressCallback)
|
|---|
| 66 | {
|
|---|
| 67 | uint64_t cbFile;
|
|---|
| 68 | rc = RTFileGetSize(hFile, &cbFile);
|
|---|
| 69 | if (RT_FAILURE(rc))
|
|---|
| 70 | {
|
|---|
| 71 | RTFileClose(hFile);
|
|---|
| 72 | return rc;
|
|---|
| 73 | }
|
|---|
| 74 | rdMulti = 100.0 / cbFile;
|
|---|
| 75 | }
|
|---|
| 76 |
|
|---|
| 77 | /* Allocate a reasonably large buffer, fall back on a tiny one. */
|
|---|
| 78 | void *pvBufFree;
|
|---|
| 79 | size_t cbBuf = _1M;
|
|---|
| 80 | void *pvBuf = pvBufFree = RTMemTmpAlloc(cbBuf);
|
|---|
| 81 | if (!pvBuf)
|
|---|
| 82 | {
|
|---|
| 83 | cbBuf = 0x1000;
|
|---|
| 84 | pvBuf = alloca(cbBuf);
|
|---|
| 85 | }
|
|---|
| 86 |
|
|---|
| 87 | /* Read that file in blocks */
|
|---|
| 88 | size_t cbRead;
|
|---|
| 89 | size_t cbReadTotal = 0;
|
|---|
| 90 | for (;;)
|
|---|
| 91 | {
|
|---|
| 92 | rc = RTFileRead(hFile, pvBuf, cbBuf, &cbRead);
|
|---|
| 93 | if (RT_FAILURE(rc) || !cbRead)
|
|---|
| 94 | break;
|
|---|
| 95 | if(!SHA1_Update(&ctx, pvBuf, cbRead))
|
|---|
| 96 | {
|
|---|
| 97 | rc = VERR_INTERNAL_ERROR;
|
|---|
| 98 | break;
|
|---|
| 99 | }
|
|---|
| 100 | cbReadTotal += cbRead;
|
|---|
| 101 |
|
|---|
| 102 | /* Call the progress callback if one is defined */
|
|---|
| 103 | if (pfnProgressCallback)
|
|---|
| 104 | {
|
|---|
| 105 | rc = pfnProgressCallback((unsigned)(cbReadTotal * rdMulti), pvUser);
|
|---|
| 106 | if (RT_FAILURE(rc))
|
|---|
| 107 | break; /* canceled */
|
|---|
| 108 | }
|
|---|
| 109 | }
|
|---|
| 110 | RTMemTmpFree(pvBufFree);
|
|---|
| 111 | RTFileClose(hFile);
|
|---|
| 112 |
|
|---|
| 113 | if (RT_FAILURE(rc))
|
|---|
| 114 | return rc;
|
|---|
| 115 |
|
|---|
| 116 | /* Finally calculate & format the SHA1 sum */
|
|---|
| 117 | unsigned char auchDig[RTSHA1_HASH_SIZE];
|
|---|
| 118 | if (!SHA1_Final(auchDig, &ctx))
|
|---|
| 119 | return VERR_INTERNAL_ERROR;
|
|---|
| 120 |
|
|---|
| 121 | char *pszDigest;
|
|---|
| 122 | rc = RTStrAllocEx(&pszDigest, RTSHA1_DIGEST_LEN + 1);
|
|---|
| 123 | if (RT_SUCCESS(rc))
|
|---|
| 124 | {
|
|---|
| 125 | rc = RTSha1ToString(auchDig, pszDigest, RTSHA1_DIGEST_LEN + 1);
|
|---|
| 126 | if (RT_SUCCESS(rc))
|
|---|
| 127 | *ppszDigest = pszDigest;
|
|---|
| 128 | else
|
|---|
| 129 | RTStrFree(pszDigest);
|
|---|
| 130 | }
|
|---|
| 131 |
|
|---|
| 132 | return rc;
|
|---|
| 133 | }
|
|---|
| 134 |
|
|---|
