Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * eCryptfs: Linux filesystem encryption layer
4 * Functions only useful for debugging.
5 *
6 * Copyright (C) 2006 International Business Machines Corp.
7 * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
8 */
9
10#include <linux/string.h>
11#include "ecryptfs_kernel.h"
12
13/*
14 * ecryptfs_dump_auth_tok - debug function to print auth toks
15 *
16 * This function will print the contents of an ecryptfs authentication
17 * token.
18 */
19void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok)
20{
21 char salt[ECRYPTFS_SALT_SIZE * 2 + 1];
22 char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
23
24 ecryptfs_printk(KERN_DEBUG, "Auth tok at mem loc [%p]:\n",
25 auth_tok);
26 if (auth_tok->flags & ECRYPTFS_PRIVATE_KEY) {
27 ecryptfs_printk(KERN_DEBUG, " * private key type\n");
28 } else {
29 ecryptfs_printk(KERN_DEBUG, " * passphrase type\n");
30 ecryptfs_to_hex(salt, auth_tok->token.password.salt,
31 ECRYPTFS_SALT_SIZE);
32 ecryptfs_printk(KERN_DEBUG, " * salt = [%s]\n", salt);
33 if (auth_tok->token.password.flags &
34 ECRYPTFS_PERSISTENT_PASSWORD) {
35 ecryptfs_printk(KERN_DEBUG, " * persistent\n");
36 }
37 strscpy(sig, auth_tok->token.password.signature);
38 ecryptfs_printk(KERN_DEBUG, " * signature = [%s]\n", sig);
39 }
40 ecryptfs_printk(KERN_DEBUG, " * session_key.flags = [0x%x]\n",
41 auth_tok->session_key.flags);
42 if (auth_tok->session_key.flags
43 & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT)
44 ecryptfs_printk(KERN_DEBUG,
45 " * Userspace decrypt request set\n");
46 if (auth_tok->session_key.flags
47 & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT)
48 ecryptfs_printk(KERN_DEBUG,
49 " * Userspace encrypt request set\n");
50 if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_DECRYPTED_KEY) {
51 ecryptfs_printk(KERN_DEBUG, " * Contains decrypted key\n");
52 ecryptfs_printk(KERN_DEBUG,
53 " * session_key.decrypted_key_size = [0x%x]\n",
54 auth_tok->session_key.decrypted_key_size);
55 ecryptfs_printk(KERN_DEBUG, " * Decrypted session key "
56 "dump:\n");
57 if (ecryptfs_verbosity > 0)
58 ecryptfs_dump_hex(auth_tok->session_key.decrypted_key,
59 ECRYPTFS_DEFAULT_KEY_BYTES);
60 }
61 if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_ENCRYPTED_KEY) {
62 ecryptfs_printk(KERN_DEBUG, " * Contains encrypted key\n");
63 ecryptfs_printk(KERN_DEBUG,
64 " * session_key.encrypted_key_size = [0x%x]\n",
65 auth_tok->session_key.encrypted_key_size);
66 ecryptfs_printk(KERN_DEBUG, " * Encrypted session key "
67 "dump:\n");
68 if (ecryptfs_verbosity > 0)
69 ecryptfs_dump_hex(auth_tok->session_key.encrypted_key,
70 auth_tok->session_key.
71 encrypted_key_size);
72 }
73}
74
75/**
76 * ecryptfs_dump_hex - debug hex printer
77 * @data: string of bytes to be printed
78 * @bytes: number of bytes to print
79 *
80 * Dump hexadecimal representation of char array
81 */
82void ecryptfs_dump_hex(char *data, int bytes)
83{
84 if (ecryptfs_verbosity < 1)
85 return;
86
87 print_hex_dump(KERN_DEBUG, "ecryptfs: ", DUMP_PREFIX_OFFSET, 16, 1,
88 data, bytes, false);
89}