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diff --git a/include/iprt/crypto/misc.h b/include/iprt/crypto/misc.h
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+/** @file
+ * IPRT - Crypto - Miscellaneous.
+ */
+
+/*
+ * Copyright (C) 2018-2022 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>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef IPRT_INCLUDED_crypto_misc_h
+#define IPRT_INCLUDED_crypto_misc_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/types.h>
+
+
+RT_C_DECLS_BEGIN
+
+/** @defgroup grp_rt_crmisc RTCrMisc - Miscellaneous
+ * @ingroup grp_rt_crypto
+ * @{
+ */
+
+/**
+ * Get cryptographically strong random bytes.
+ *
+ * The buffer will always be filled with random bytes, however only
+ * on @c VINF_SUCCESS is it guaranteed to be strong random bytes.
+ *
+ * @retval  VINF_SUCCESS
+ * @retval  VERR_CR_RANDOM_FAILED if insufficient strong random bytes or some similar failure.
+ * @retval  VERR_CR_RANDOM_SETUP_FAILED if setting up strong random failed
+ *          and no strong bytes returned.
+ *
+ * @param   pvDst               Where to return the random bytes.
+ * @param   cbDst               How many random bytes to return.
+ */
+RTDECL(int) RTCrRandBytes(void *pvDst, size_t cbDst);
+
+RTDECL(int) RTCrPkcs5Pbkdf2Hmac(void const *pvInput, size_t cbInput, void const *pvSalt, size_t cbSalt, uint32_t cIterations,
+                                RTDIGESTTYPE enmDigestType, size_t cbKeyLen, void *pvOutput);
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !IPRT_INCLUDED_crypto_misc_h */
+