1 files changed, 114 insertions, 0 deletions
diff --git a/src/VBox/Main/src-all/HashedPw.cpp b/src/VBox/Main/src-all/HashedPw.cpp
new file mode 100644
index 00000000..d3912989
--- /dev/null
+++ b/src/VBox/Main/src-all/HashedPw.cpp
@@ -0,0 +1,114 @@
+/* $Id: HashedPw.cpp $ */
+/** @file
+ * Main - Password Hashing
+ */
+
+/*
+ * Copyright (C) 2012-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.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, in version 3 of the
+ * License.
+ *
+ * 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, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "HashedPw.h"
+
+#include <iprt/assert.h>
+#include <iprt/ctype.h>
+#include <iprt/sha.h>
+#include <iprt/string.h>
+
+
+/*********************************************************************************************************************************
+*   Global Variables                                                                                                             *
+*********************************************************************************************************************************/
+/**
+ * The prefix of a hashed password.
+ */
+static const char s_szHashedPwPrefix[] = "#SHA-512#";
+
+
+/**
+ * Checks if the password is a hashed one or not.
+ *
+ * Empty password are not considered hashed.
+ *
+ * @returns true if hashed, false if not.
+ * @param   a_pstrPassword  Password to inspect.
+ */
+bool VBoxIsPasswordHashed(RTCString const *a_pstrPassword)
+{
+    /* prefix */
+    if (!a_pstrPassword->startsWith(s_szHashedPwPrefix))
+        return false;
+
+    /* salt (optional) */
+    const char *pszSalt    = a_pstrPassword->c_str() + sizeof(s_szHashedPwPrefix) - 1;
+    const char *pszSaltEnd = strchr(pszSalt, '#');
+    if (!pszSaltEnd)
+        return false;
+    while (pszSalt != pszSaltEnd)
+    {
+        if (!RT_C_IS_XDIGIT(*pszSalt))
+            return false;
+        pszSalt++;
+    }
+
+    /* hash */
+    uint8_t abHash[RTSHA512_HASH_SIZE];
+    int vrc = RTSha512FromString(pszSaltEnd + 1, abHash);
+    return RT_SUCCESS(vrc);
+}
+
+
+/**
+ * Hashes a plain text password.
+ *
+ * @param   a_pstrPassword      Plain text password to hash.  This is both
+ *                              input and output.
+ */
+void VBoxHashPassword(RTCString *a_pstrPassword)
+{
+    AssertReturnVoid(!VBoxIsPasswordHashed(a_pstrPassword));
+
+    char szHashedPw[sizeof(s_szHashedPwPrefix) + 1 + RTSHA512_DIGEST_LEN];
+    if (a_pstrPassword->isEmpty())
+        szHashedPw[0] = '\0';
+    else
+    {
+        /* prefix */
+        char *pszHashedPw = szHashedPw;
+        strcpy(pszHashedPw, s_szHashedPwPrefix);
+        pszHashedPw += sizeof(s_szHashedPwPrefix) - 1;
+
+        /* salt */
+        *pszHashedPw++ = '#'; /* no salt yet */
+
+        /* hash */
+        uint8_t abHash[RTSHA512_HASH_SIZE];
+        RTSha512(a_pstrPassword->c_str(), a_pstrPassword->length(), abHash);
+        int vrc = RTSha512ToString(abHash, pszHashedPw, sizeof(szHashedPw) - (size_t)(pszHashedPw - &szHashedPw[0]));
+        AssertReleaseRC(vrc);
+    }
+
+    *a_pstrPassword = szHashedPw;
+}
+