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/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Copyright (C) 1998 by the FundsXpress, INC.
*
* All rights reserved.
*
* Export of this software from the United States of America may require
* a specific license from the United States Government. It is the
* responsibility of any person or organization contemplating export to
* obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of FundsXpress. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. FundsXpress makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#include <k5-int.h>
#ifdef _KERNEL
#include <sys/random.h>
#endif
#ifndef _KERNEL
/*
* Solaris kerberos: we don't need a random number generator
* for the /dev/[u]random, as it uses entropy in the kernel.
* Keep this function as some apps might call it directly.
*/
/*ARGSUSED*/
krb5_error_code KRB5_CALLCONV
krb5_c_random_seed(krb5_context context, krb5_data *data)
{
/*
* We can't do much if this fails, so ignore the
* return code. /dev/urandom has its own entropy
* source, so seeding it from here is of questionable
* value in the first place.
*/
(void) C_SeedRandom(krb_ctx_hSession(context),
(CK_BYTE_PTR)data->data,
(CK_ULONG)data->length);
return(0);
}
#endif /* !_KERNEL */
/*
* krb5_get_random_octets
* New for Solaris 9. This routine takes advantage of the new
* /dev/[u]random interface provided in Solaris 9 for getting random
* bytes generated from the kernel. The entropy produced there is generally
* considered better than the current MIT PRNG code that we are replacing.
*
* This func is visible so that it can be used to generate a
* random confounder.
*/
#ifndef _KERNEL
#endif /* ! _KERNEL */
/*
* We can assume that the memory for data is already malloc'd.
* Return an error if there is an error, but don't clear the data->length
* or free data->data. This will be done by the calling function.
*/
/*ARGSUSED*/
krb5_error_code KRB5_CALLCONV
krb5_c_random_make_octets(krb5_context context, krb5_data *data)
{
/*
* Solaris kerberos uses /dev/[u]random
*/
#ifndef _KERNEL /* User space code */
krb5_error_code err = 0;
CK_RV rv;
KRB5_LOG0(KRB5_INFO, "krb5_c_random_make_octets() start, user space using "
"krb5_get_random_octets()\n");
rv = C_GenerateRandom(krb_ctx_hSession(context), (CK_BYTE_PTR)data->data,
(CK_ULONG)data->length);
if (rv != CKR_OK) {
KRB5_LOG(KRB5_ERR, "C_GenerateRandom failed in "
"krb5_c_random_make_octets: rv = 0x%x.", rv);
err = PKCS_ERR;
}
if (err != 0) {
KRB5_LOG0(KRB5_ERR, "krb5_c_random_make_octets() end, error");
return (err);
}
#else /* Kernel code section */
/*
* Solaris Kerberos: for kernel code we use the randomness generator native
* to Solaris 9. We avoid global variables and other nastiness this way.
*
* Using random_get_pseudo_bytes() instead of random_get_bytes() because it
* will not return an error code if there isn't enough entropy but will use
* a pseudo random algorithm to produce randomness. Most of the time it
* should be as good as random_get_bytes() and we don't have to worry about
* dealing with a non-fatal error.
*/
KRB5_LOG0(KRB5_INFO, "krb5_c_random_make_octets() start, kernel using "
"random_get_pseudo_bytes()\n ");
if(random_get_pseudo_bytes((uint8_t *)data->data, data->length) != 0) {
KRB5_LOG0(KRB5_ERR, "krb5_c_random_make_octets() end, "
"random_get_pseudo_bytes() error.\n");
return(KRB5_CRYPTO_INTERNAL);
}
#endif /* !_KERNEL */
KRB5_LOG0(KRB5_INFO, "krb5_c_random_make_octets() end\n");
return(0);
}
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