openssl-1.1.0h/crypto/des/rand_key.c


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/*
 * Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <openssl/des.h>
#include <openssl/rand.h>

int DES_random_key(DES_cblock *ret)
{
    do {
        if (RAND_bytes((unsigned char *)ret, sizeof(DES_cblock)) != 1)
            return (0);
    } while (DES_is_weak_key(ret));
    DES_set_odd_parity(ret);
    return (1);
}