15263807472

1	/* SPDX-License-Identifier: LGPL-2.1-or-later */
2
3	#include "alloc-util.h"
4	#include "keyring-util.h"
5	#include "log.h"
6	#include "missing_syscall.h"
7
UNCOV 8	int keyring_read(key_serial_t serial, void *ret, size_t ret_size) {	×
9	size_t bufsize = 100;	×
10
UNCOV 11	for (;;) {	×
12	_cleanup_(erase_and_freep) uint8_t *buf = NULL;	×
13	long n;	×
14
UNCOV 15	buf = new(uint8_t, bufsize + 1);	×
16	if (!buf)	×
17	return -ENOMEM;
18
UNCOV 19	n = keyctl(KEYCTL_READ, (unsigned long) serial, (unsigned long) buf, (unsigned long) bufsize, 0);	×
20	if (n < 0)	×
21	return -errno;	×
22
UNCOV 23	if ((size_t) n <= bufsize) {	×
24	buf[n] = 0; /* NUL terminate, just in case */	×
25
UNCOV 26	if (ret)	×
27	*ret = TAKE_PTR(buf);	×
28	if (ret_size)	×
29	*ret_size = n;	×
30
UNCOV 31	return 0;	×
32	}
33
UNCOV 34	bufsize = (size_t) n;	×
35	}
36	}
37
UNCOV 38	int keyring_describe(key_serial_t serial, char **ret) {	×
39	_cleanup_free_ char *tuple = NULL;	×
40	size_t sz = 64;	×
41	int c = -1; /* Workaround for maybe-uninitialized false positive due to missing_syscall indirection */	×
42
UNCOV 43	assert(ret);	×
44
UNCOV 45	for (;;) {	×
46	tuple = new(char, sz);	×
47	if (!tuple)	×
48	return log_oom_debug();	×
49
UNCOV 50	c = keyctl(KEYCTL_DESCRIBE, serial, (unsigned long) tuple, c, 0);	×
51	if (c < 0)	×
52	return log_debug_errno(errno, "Failed to describe key id %d: %m", serial);	×
53
UNCOV 54	if ((size_t) c <= sz)	×
55	break;
56
UNCOV 57	sz = c;	×
58	free(tuple);	×
59	}
60
61	/* The kernel returns a final NUL in the string, verify that. */
UNCOV 62	assert(tuple[c-1] == 0);	×
63
UNCOV 64	*ret = TAKE_PTR(tuple);	×
65
UNCOV 66	return 0;	×
67	}

systemd / systemd / 15263807472

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