| 1 | /* $Id: HashedPw.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * Main - Password Hashing
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2012-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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| 26 | */
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| 27 |
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| 28 |
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| 29 | /*********************************************************************************************************************************
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| 30 | * Header Files *
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| 31 | *********************************************************************************************************************************/
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| 32 | #include "HashedPw.h"
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| 33 |
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| 34 | #include <iprt/assert.h>
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| 35 | #include <iprt/ctype.h>
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| 36 | #include <iprt/sha.h>
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| 37 | #include <iprt/string.h>
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| 38 |
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| 39 |
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| 40 | /*********************************************************************************************************************************
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| 41 | * Global Variables *
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| 42 | *********************************************************************************************************************************/
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| 43 | /**
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| 44 | * The prefix of a hashed password.
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| 45 | */
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| 46 | static const char s_szHashedPwPrefix[] = "#SHA-512#";
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| 47 |
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| 48 |
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| 49 | /**
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| 50 | * Checks if the password is a hashed one or not.
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| 51 | *
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| 52 | * Empty password are not considered hashed.
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| 53 | *
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| 54 | * @returns true if hashed, false if not.
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| 55 | * @param a_pstrPassword Password to inspect.
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| 56 | */
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| 57 | bool VBoxIsPasswordHashed(RTCString const *a_pstrPassword)
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| 58 | {
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| 59 | /* prefix */
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| 60 | if (!a_pstrPassword->startsWith(s_szHashedPwPrefix))
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| 61 | return false;
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| 62 |
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| 63 | /* salt (optional) */
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| 64 | const char *pszSalt = a_pstrPassword->c_str() + sizeof(s_szHashedPwPrefix) - 1;
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| 65 | const char *pszSaltEnd = strchr(pszSalt, '#');
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| 66 | if (!pszSaltEnd)
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| 67 | return false;
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| 68 | while (pszSalt != pszSaltEnd)
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| 69 | {
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| 70 | if (!RT_C_IS_XDIGIT(*pszSalt))
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| 71 | return false;
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| 72 | pszSalt++;
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| 73 | }
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| 74 |
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| 75 | /* hash */
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| 76 | uint8_t abHash[RTSHA512_HASH_SIZE];
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| 77 | int vrc = RTSha512FromString(pszSaltEnd + 1, abHash);
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| 78 | return RT_SUCCESS(vrc);
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| 79 | }
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| 80 |
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| 81 |
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| 82 | /**
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| 83 | * Hashes a plain text password.
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| 84 | *
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| 85 | * @param a_pstrPassword Plain text password to hash. This is both
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| 86 | * input and output.
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| 87 | */
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| 88 | void VBoxHashPassword(RTCString *a_pstrPassword)
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| 89 | {
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| 90 | AssertReturnVoid(!VBoxIsPasswordHashed(a_pstrPassword));
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| 91 |
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| 92 | char szHashedPw[sizeof(s_szHashedPwPrefix) + 1 + RTSHA512_DIGEST_LEN];
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| 93 | if (a_pstrPassword->isEmpty())
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| 94 | szHashedPw[0] = '\0';
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| 95 | else
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| 96 | {
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| 97 | /* prefix */
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| 98 | char *pszHashedPw = szHashedPw;
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| 99 | strcpy(pszHashedPw, s_szHashedPwPrefix);
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| 100 | pszHashedPw += sizeof(s_szHashedPwPrefix) - 1;
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| 101 |
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| 102 | /* salt */
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| 103 | *pszHashedPw++ = '#'; /* no salt yet */
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| 104 |
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| 105 | /* hash */
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| 106 | uint8_t abHash[RTSHA512_HASH_SIZE];
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| 107 | RTSha512(a_pstrPassword->c_str(), a_pstrPassword->length(), abHash);
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| 108 | int vrc = RTSha512ToString(abHash, pszHashedPw, sizeof(szHashedPw) - (size_t)(pszHashedPw - &szHashedPw[0]));
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| 109 | AssertReleaseRC(vrc);
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| 110 | }
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| 111 |
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| 112 | *a_pstrPassword = szHashedPw;
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| 113 | }
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| 114 |
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