From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- security/keys/compat_dh.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 security/keys/compat_dh.c (limited to 'security/keys/compat_dh.c') diff --git a/security/keys/compat_dh.c b/security/keys/compat_dh.c new file mode 100644 index 000000000..aa6b34caf --- /dev/null +++ b/security/keys/compat_dh.c @@ -0,0 +1,40 @@ +/* 32-bit compatibility syscall for 64-bit systems for DH operations + * + * Copyright (C) 2016 Stephan Mueller + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include + +#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, + sizeof(kdfcopy.__spare)); + + return __keyctl_dh_compute(params, buffer, buflen, &kdfcopy); +} -- cgit v1.2.3