| 1 | |
| 2 | |
| 3 | *
|
| 4 | * Copyright (C) 2016 Stephan Mueller <[email protected]>
|
| 5 |
|
| 6 |
|
| 7 | #include <linux/uaccess.h>
|
| 8 |
|
| 9 | #include "internal.h"
|
| 10 |
|
| 11 | |
| 12 | * Perform the DH computation or DH based key derivation.
|
| 13 | *
|
| 14 | * If successful, 0 will be returned.
|
| 15 |
|
| 16 | long compat_keyctl_dh_compute(struct keyctl_dh_params __user *params,
|
| 17 | char __user *buffer, size_t buflen,
|
| 18 | struct compat_keyctl_kdf_params __user *kdf)
|
| 19 | {
|
| 20 | struct keyctl_kdf_params kdfcopy;
|
| 21 | struct compat_keyctl_kdf_params compat_kdfcopy;
|
| 22 |
|
| 23 | if (!kdf)
|
| 24 | return __keyctl_dh_compute(params, buffer, buflen, NULL);
|
| 25 |
|
| 26 | if (copy_from_user(&compat_kdfcopy, kdf, sizeof(compat_kdfcopy)) != 0)
|
| 27 | return -EFAULT;
|
| 28 |
|
| 29 | kdfcopy.hashname = compat_ptr(compat_kdfcopy.hashname);
|
| 30 | kdfcopy.otherinfo = compat_ptr(compat_kdfcopy.otherinfo);
|
| 31 | kdfcopy.otherinfolen = compat_kdfcopy.otherinfolen;
|
| 32 | memcpy(kdfcopy.__spare, compat_kdfcopy.__spare,
|
| 33 | sizeof(kdfcopy.__spare));
|
| 34 |
|
| 35 | return __keyctl_dh_compute(params, buffer, buflen, &kdfcopy);
|
| 36 | }
|