blob: 19384e7e976c2ebafc48885f38a9dc0740c93e88 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-or-later
/* 32-bit compatibility syscall for 64-bit systems for DH operations
* Copyright (C) 2016 Stephan Mueller <>
#include <linux/uaccess.h>
#include "internal.h"
* Perform the DH computation or DH based key derivation.
* If successful, 0 will be returned.
long compat_keyctl_dh_compute(struct keyctl_dh_params __user *params,
char __user *buffer, size_t buflen,
struct compat_keyctl_kdf_params __user *kdf)
struct keyctl_kdf_params kdfcopy;
struct compat_keyctl_kdf_params compat_kdfcopy;
if (!kdf)
return __keyctl_dh_compute(params, buffer, buflen, NULL);
if (copy_from_user(&compat_kdfcopy, kdf, sizeof(compat_kdfcopy)) != 0)
return -EFAULT;
kdfcopy.hashname = compat_ptr(compat_kdfcopy.hashname);
kdfcopy.otherinfo = compat_ptr(compat_kdfcopy.otherinfo);
kdfcopy.otherinfolen = compat_kdfcopy.otherinfolen;
memcpy(kdfcopy.__spare, compat_kdfcopy.__spare,
return __keyctl_dh_compute(params, buffer, buflen, &kdfcopy);