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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/* lib/crypto/krb/prng_os.c - OS PRNG implementation */
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/*
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* Copyright (C) 2016 by the Massachusetts Institute of Technology.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This file implements a PRNG module which relies on the system's PRNG. An
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* OS packager can select this module given sufficient confidence in the
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* operating system's native PRNG quality.
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*/
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#include "crypto_int.h"
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int
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k5_prng_init(void)
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{
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return 0;
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}
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void
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k5_prng_cleanup(void)
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{
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}
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krb5_error_code KRB5_CALLCONV
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krb5_c_random_add_entropy(krb5_context context, unsigned int randsource,
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const krb5_data *indata)
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{
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return 0;
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}
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krb5_error_code KRB5_CALLCONV
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krb5_c_random_make_octets(krb5_context context, krb5_data *outdata)
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{
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krb5_boolean res;
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res = k5_get_os_entropy((uint8_t *)outdata->data, outdata->length, 0);
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return res ? 0 : KRB5_CRYPTO_INTERNAL;
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}
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krb5_error_code KRB5_CALLCONV
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krb5_c_random_os_entropy(krb5_context context, int strong, int *success)
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{
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return 0;
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}
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