374 lines
8.7 KiB
C
374 lines
8.7 KiB
C
/*
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* Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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typedef int32_t key_serial_t;
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#include "xlat/key_spec.h"
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struct keyctl_dh_params {
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int32_t private;
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int32_t prime;
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int32_t base;
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};
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static void
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print_keyring_serial_number(key_serial_t id)
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{
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const char *str = xlookup(key_spec, (unsigned int) id);
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if (str)
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tprints(str);
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else
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tprintf("%d", id);
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}
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SYS_FUNC(add_key)
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{
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/* type */
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printstr(tcp, tcp->u_arg[0]);
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/* description */
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tprints(", ");
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printstr(tcp, tcp->u_arg[1]);
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/* payload */
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tprints(", ");
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printstrn(tcp, tcp->u_arg[2], tcp->u_arg[3]);
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/* payload length */
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tprintf(", %" PRI_klu ", ", tcp->u_arg[3]);
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/* keyring serial number */
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print_keyring_serial_number(tcp->u_arg[4]);
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return RVAL_DECODED;
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}
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SYS_FUNC(request_key)
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{
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/* type */
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printstr(tcp, tcp->u_arg[0]);
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/* description */
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tprints(", ");
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printstr(tcp, tcp->u_arg[1]);
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/* callout_info */
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tprints(", ");
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printstr(tcp, tcp->u_arg[2]);
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/* keyring serial number */
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tprints(", ");
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print_keyring_serial_number(tcp->u_arg[3]);
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return RVAL_DECODED;
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}
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static void
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keyctl_get_keyring_id(struct tcb *tcp, key_serial_t id, int create)
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{
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print_keyring_serial_number(id);
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tprintf(", %d", create);
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}
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static void
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keyctl_update_key(struct tcb *tcp, key_serial_t id, kernel_ulong_t addr,
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kernel_ulong_t len)
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{
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print_keyring_serial_number(id);
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tprints(", ");
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printstrn(tcp, addr, len);
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tprintf(", %llu", zero_extend_signed_to_ull(len));
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}
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static void
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keyctl_handle_key_key(struct tcb *tcp, key_serial_t id1, key_serial_t id2)
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{
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print_keyring_serial_number(id1);
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tprints(", ");
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print_keyring_serial_number(id2);
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}
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static void
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keyctl_read_key(struct tcb *tcp, key_serial_t id, kernel_ulong_t addr,
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kernel_ulong_t len, bool has_nul)
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{
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if (entering(tcp)) {
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print_keyring_serial_number(id);
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tprints(", ");
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} else {
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if (syserror(tcp))
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printaddr(addr);
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else {
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kernel_ulong_t rval = (tcp->u_rval >= 0) &&
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((kernel_ulong_t) tcp->u_rval > len) ? len :
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(kernel_ulong_t) tcp->u_rval;
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printstr_ex(tcp, addr, rval, has_nul ?
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QUOTE_OMIT_TRAILING_0 : 0);
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}
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tprintf(", %llu", zero_extend_signed_to_ull(len));
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}
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}
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static void
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keyctl_keyring_search(struct tcb *tcp, key_serial_t id1, kernel_ulong_t addr1,
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kernel_ulong_t addr2, key_serial_t id2)
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{
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print_keyring_serial_number(id1);
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tprints(", ");
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printstr(tcp, addr1);
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tprints(", ");
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printstr(tcp, addr2);
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tprints(", ");
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print_keyring_serial_number(id2);
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}
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static void
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keyctl_chown_key(struct tcb *tcp, key_serial_t id, unsigned user,
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unsigned group)
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{
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print_keyring_serial_number(id);
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printuid(", ", user);
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printuid(", ", group);
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}
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static void
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keyctl_instantiate_key(struct tcb *tcp, key_serial_t id1, kernel_ulong_t addr,
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kernel_ulong_t len, key_serial_t id2)
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{
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print_keyring_serial_number(id1);
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tprints(", ");
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printstrn(tcp, addr, len);
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tprintf(", %llu, ", zero_extend_signed_to_ull(len));
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print_keyring_serial_number(id2);
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}
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static void
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keyctl_instantiate_key_iov(struct tcb *tcp, key_serial_t id1,
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kernel_ulong_t addr, kernel_ulong_t len,
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key_serial_t id2)
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{
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print_keyring_serial_number(id1);
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tprints(", ");
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tprint_iov(tcp, len, addr, IOV_DECODE_STR);
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tprintf(", %llu, ", zero_extend_signed_to_ull(len));
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print_keyring_serial_number(id2);
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}
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static void
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keyctl_negate_key(struct tcb *tcp, key_serial_t id1, unsigned timeout,
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key_serial_t id2)
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{
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print_keyring_serial_number(id1);
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tprintf(", %u, ", timeout);
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print_keyring_serial_number(id2);
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}
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static void
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keyctl_reject_key(struct tcb *tcp, key_serial_t id1, unsigned timeout,
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unsigned error, key_serial_t id2)
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{
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const char *err_str = err_name(error);
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print_keyring_serial_number(id1);
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tprintf(", %u, ", timeout);
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if (err_str)
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tprintf("%s, ", err_str);
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else
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tprintf("%u, ", error);
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print_keyring_serial_number(id2);
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}
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static void
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keyctl_set_timeout(struct tcb *tcp, key_serial_t id, unsigned timeout)
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{
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print_keyring_serial_number(id);
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tprintf(", %u", timeout);
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}
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static void
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keyctl_get_persistent(struct tcb *tcp, unsigned uid, key_serial_t id)
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{
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printuid("", uid);
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tprints(", ");
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print_keyring_serial_number(id);
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}
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#include "xlat/key_perms.h"
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static void
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keyctl_setperm_key(struct tcb *tcp, key_serial_t id, uint32_t perm)
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{
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print_keyring_serial_number(id);
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tprints(", ");
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printflags(key_perms, perm, "KEY_???");
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}
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static void
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print_dh_params(struct tcb *tcp, kernel_ulong_t addr)
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{
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struct keyctl_dh_params params;
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if (umove_or_printaddr(tcp, addr, ¶ms))
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return;
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tprints("{private=");
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print_keyring_serial_number(params.private);
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tprints(", prime=");
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print_keyring_serial_number(params.prime);
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tprints(", base=");
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print_keyring_serial_number(params.base);
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tprints("}");
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}
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static void
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keyctl_dh_compute(struct tcb *tcp, kernel_ulong_t params, kernel_ulong_t buf,
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kernel_ulong_t len)
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{
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if (entering(tcp)) {
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print_dh_params(tcp, params);
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tprints(", ");
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} else {
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if (syserror(tcp)) {
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printaddr(buf);
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} else {
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kernel_ulong_t rval = (tcp->u_rval >= 0) &&
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((kernel_ulong_t) tcp->u_rval > len) ? len :
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(kernel_ulong_t) tcp->u_rval;
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printstrn(tcp, buf, rval);
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}
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tprintf(", %llu", zero_extend_signed_to_ull(len));
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}
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}
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#include "xlat/key_reqkeys.h"
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#include "xlat/keyctl_commands.h"
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SYS_FUNC(keyctl)
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{
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int cmd = tcp->u_arg[0];
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kernel_ulong_t arg2 = tcp->u_arg[1];
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kernel_ulong_t arg3 = tcp->u_arg[2];
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kernel_ulong_t arg4 = tcp->u_arg[3];
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kernel_ulong_t arg5 = tcp->u_arg[4];
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if (entering(tcp)) {
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printxval(keyctl_commands, cmd, "KEYCTL_???");
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/*
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* For now, KEYCTL_SESSION_TO_PARENT is the only cmd without
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* arguments.
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*/
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if (cmd != KEYCTL_SESSION_TO_PARENT)
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tprints(", ");
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}
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switch (cmd) {
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case KEYCTL_GET_KEYRING_ID:
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keyctl_get_keyring_id(tcp, arg2, arg3);
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break;
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case KEYCTL_JOIN_SESSION_KEYRING:
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printstr(tcp, arg2);
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break;
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case KEYCTL_UPDATE:
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keyctl_update_key(tcp, arg2, arg3, arg4);
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break;
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case KEYCTL_REVOKE:
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case KEYCTL_CLEAR:
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case KEYCTL_INVALIDATE:
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case KEYCTL_ASSUME_AUTHORITY:
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print_keyring_serial_number(arg2);
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break;
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case KEYCTL_LINK:
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case KEYCTL_UNLINK:
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keyctl_handle_key_key(tcp, arg2, arg3);
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break;
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case KEYCTL_DESCRIBE:
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case KEYCTL_READ:
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case KEYCTL_GET_SECURITY:
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keyctl_read_key(tcp, arg2, arg3, arg4, cmd != KEYCTL_READ);
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return 0;
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case KEYCTL_SEARCH:
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keyctl_keyring_search(tcp, arg2, arg3, arg4, arg5);
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break;
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case KEYCTL_CHOWN:
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keyctl_chown_key(tcp, arg2, arg3, arg4);
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break;
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case KEYCTL_SETPERM:
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keyctl_setperm_key(tcp, arg2, arg3);
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break;
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case KEYCTL_INSTANTIATE:
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keyctl_instantiate_key(tcp, arg2, arg3, arg4, arg5);
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break;
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case KEYCTL_NEGATE:
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keyctl_negate_key(tcp, arg2, arg3, arg4);
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break;
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case KEYCTL_SET_REQKEY_KEYRING:
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printxval(key_reqkeys, arg2, "KEY_REQKEY_DEFL_???");
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break;
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case KEYCTL_SET_TIMEOUT:
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keyctl_set_timeout(tcp, arg2, arg3);
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break;
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case KEYCTL_SESSION_TO_PARENT:
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break;
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case KEYCTL_REJECT:
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keyctl_reject_key(tcp, arg2, arg3, arg4, arg5);
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break;
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case KEYCTL_INSTANTIATE_IOV:
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keyctl_instantiate_key_iov(tcp, arg2, arg3, arg4, arg5);
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break;
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case KEYCTL_GET_PERSISTENT:
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keyctl_get_persistent(tcp, arg2, arg3);
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break;
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case KEYCTL_DH_COMPUTE:
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keyctl_dh_compute(tcp, arg2, arg3, arg4);
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return 0;
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default:
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tprintf("%#" PRI_klx ", %#" PRI_klx
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", %#" PRI_klx ", %#" PRI_klx,
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arg2, arg3, arg4, arg5);
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break;
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}
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return RVAL_DECODED;
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}
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