| 1 | /* $Id: HashedPw.cpp 40066 2012-02-10 14:52:47Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * Main - Password Hashing
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2012 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 |
|
|---|
| 18 | /*******************************************************************************
|
|---|
| 19 | * Header Files *
|
|---|
| 20 | *******************************************************************************/
|
|---|
| 21 | #include "HashedPw.h"
|
|---|
| 22 |
|
|---|
| 23 | #include <iprt/assert.h>
|
|---|
| 24 | #include <iprt/ctype.h>
|
|---|
| 25 | #include <iprt/sha.h>
|
|---|
| 26 | #include <iprt/string.h>
|
|---|
| 27 |
|
|---|
| 28 |
|
|---|
| 29 | /*******************************************************************************
|
|---|
| 30 | * Global Variables *
|
|---|
| 31 | *******************************************************************************/
|
|---|
| 32 | /**
|
|---|
| 33 | * The prefix of a hashed password.
|
|---|
| 34 | */
|
|---|
| 35 | static const char s_szHashedPwPrefix[] = "#SHA-512#";
|
|---|
| 36 |
|
|---|
| 37 |
|
|---|
| 38 | /**
|
|---|
| 39 | * Checks if the password is a hashed one or not.
|
|---|
| 40 | *
|
|---|
| 41 | * Empty password are not considered hashed.
|
|---|
| 42 | *
|
|---|
| 43 | * @returns true if hashed, false if not.
|
|---|
| 44 | * @param a_pstrPassword Password to inspect.
|
|---|
| 45 | */
|
|---|
| 46 | bool VBoxIsPasswordHashed(RTCString const *a_pstrPassword)
|
|---|
| 47 | {
|
|---|
| 48 | /* prefix */
|
|---|
| 49 | if (!a_pstrPassword->startsWith(s_szHashedPwPrefix))
|
|---|
| 50 | return false;
|
|---|
| 51 |
|
|---|
| 52 | /* salt (optional) */
|
|---|
| 53 | const char *pszSalt = a_pstrPassword->c_str() + sizeof(s_szHashedPwPrefix) - 1;
|
|---|
| 54 | const char *pszSaltEnd = strchr(pszSalt, '#');
|
|---|
| 55 | if (!pszSaltEnd)
|
|---|
| 56 | return false;
|
|---|
| 57 | while (pszSalt != pszSaltEnd)
|
|---|
| 58 | {
|
|---|
| 59 | if (!RT_C_IS_XDIGIT(*pszSalt))
|
|---|
| 60 | return false;
|
|---|
| 61 | pszSalt++;
|
|---|
| 62 | }
|
|---|
| 63 |
|
|---|
| 64 | /* hash */
|
|---|
| 65 | uint8_t abHash[RTSHA512_HASH_SIZE];
|
|---|
| 66 | int rc = RTSha512FromString(pszSaltEnd + 1, abHash);
|
|---|
| 67 | return RT_SUCCESS(rc);
|
|---|
| 68 | }
|
|---|
| 69 |
|
|---|
| 70 |
|
|---|
| 71 | /**
|
|---|
| 72 | * Hashes a plain text password.
|
|---|
| 73 | *
|
|---|
| 74 | * @param a_pstrPassword Plain text password to hash. This is both
|
|---|
| 75 | * input and output.
|
|---|
| 76 | */
|
|---|
| 77 | void VBoxHashPassword(RTCString *a_pstrPassword)
|
|---|
| 78 | {
|
|---|
| 79 | AssertReturnVoid(!VBoxIsPasswordHashed(a_pstrPassword));
|
|---|
| 80 |
|
|---|
| 81 | char szHashedPw[sizeof(s_szHashedPwPrefix) + 1 + RTSHA512_DIGEST_LEN];
|
|---|
| 82 | if (a_pstrPassword->isEmpty())
|
|---|
| 83 | szHashedPw[0] = '\0';
|
|---|
| 84 | else
|
|---|
| 85 | {
|
|---|
| 86 | /* prefix */
|
|---|
| 87 | char *pszHashedPw = szHashedPw;
|
|---|
| 88 | strcpy(pszHashedPw, s_szHashedPwPrefix);
|
|---|
| 89 | pszHashedPw += sizeof(s_szHashedPwPrefix) - 1;
|
|---|
| 90 |
|
|---|
| 91 | /* salt */
|
|---|
| 92 | *pszHashedPw++ = '#'; /* no salt yet */
|
|---|
| 93 |
|
|---|
| 94 | /* hash */
|
|---|
| 95 | uint8_t abHash[RTSHA512_HASH_SIZE];
|
|---|
| 96 | RTSha512(a_pstrPassword->c_str(), a_pstrPassword->length(), abHash);
|
|---|
| 97 | int rc = RTSha512ToString(abHash, pszHashedPw, sizeof(szHashedPw) - (pszHashedPw - &szHashedPw[0]));
|
|---|
| 98 | AssertReleaseRC(rc);
|
|---|
| 99 | }
|
|---|
| 100 |
|
|---|
| 101 | *a_pstrPassword = szHashedPw;
|
|---|
| 102 | }
|
|---|
| 103 |
|
|---|
