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1 | /** |
2 | * eCryptfs: Linux filesystem encryption layer | |
3 | * Functions only useful for debugging. | |
4 | * | |
5 | * Copyright (C) 2006 International Business Machines Corp. | |
6 | * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of the | |
11 | * License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
21 | * 02111-1307, USA. | |
22 | */ | |
23 | ||
24 | #include "ecryptfs_kernel.h" | |
25 | ||
26 | /** | |
27 | * ecryptfs_dump_auth_tok - debug function to print auth toks | |
28 | * | |
29 | * This function will print the contents of an ecryptfs authentication | |
30 | * token. | |
31 | */ | |
32 | void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok) | |
33 | { | |
34 | char salt[ECRYPTFS_SALT_SIZE * 2 + 1]; | |
35 | char sig[ECRYPTFS_SIG_SIZE_HEX + 1]; | |
36 | ||
37 | ecryptfs_printk(KERN_DEBUG, "Auth tok at mem loc [%p]:\n", | |
38 | auth_tok); | |
39 | if (ECRYPTFS_CHECK_FLAG(auth_tok->flags, ECRYPTFS_PRIVATE_KEY)) { | |
40 | ecryptfs_printk(KERN_DEBUG, " * private key type\n"); | |
41 | ecryptfs_printk(KERN_DEBUG, " * (NO PRIVATE KEY SUPPORT " | |
42 | "IN ECRYPTFS VERSION 0.1)\n"); | |
43 | } else { | |
44 | ecryptfs_printk(KERN_DEBUG, " * passphrase type\n"); | |
45 | ecryptfs_to_hex(salt, auth_tok->token.password.salt, | |
46 | ECRYPTFS_SALT_SIZE); | |
47 | salt[ECRYPTFS_SALT_SIZE * 2] = '\0'; | |
48 | ecryptfs_printk(KERN_DEBUG, " * salt = [%s]\n", salt); | |
49 | if (ECRYPTFS_CHECK_FLAG(auth_tok->token.password.flags, | |
50 | ECRYPTFS_PERSISTENT_PASSWORD)) { | |
51 | ecryptfs_printk(KERN_DEBUG, " * persistent\n"); | |
52 | } | |
53 | memcpy(sig, auth_tok->token.password.signature, | |
54 | ECRYPTFS_SIG_SIZE_HEX); | |
55 | sig[ECRYPTFS_SIG_SIZE_HEX] = '\0'; | |
56 | ecryptfs_printk(KERN_DEBUG, " * signature = [%s]\n", sig); | |
57 | } | |
58 | ecryptfs_printk(KERN_DEBUG, " * session_key.flags = [0x%x]\n", | |
59 | auth_tok->session_key.flags); | |
60 | if (auth_tok->session_key.flags | |
61 | & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT) | |
62 | ecryptfs_printk(KERN_DEBUG, | |
63 | " * Userspace decrypt request set\n"); | |
64 | if (auth_tok->session_key.flags | |
65 | & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT) | |
66 | ecryptfs_printk(KERN_DEBUG, | |
67 | " * Userspace encrypt request set\n"); | |
68 | if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_DECRYPTED_KEY) { | |
69 | ecryptfs_printk(KERN_DEBUG, " * Contains decrypted key\n"); | |
70 | ecryptfs_printk(KERN_DEBUG, | |
71 | " * session_key.decrypted_key_size = [0x%x]\n", | |
72 | auth_tok->session_key.decrypted_key_size); | |
73 | ecryptfs_printk(KERN_DEBUG, " * Decrypted session key " | |
74 | "dump:\n"); | |
75 | if (ecryptfs_verbosity > 0) | |
76 | ecryptfs_dump_hex(auth_tok->session_key.decrypted_key, | |
77 | ECRYPTFS_DEFAULT_KEY_BYTES); | |
78 | } | |
79 | if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_ENCRYPTED_KEY) { | |
80 | ecryptfs_printk(KERN_DEBUG, " * Contains encrypted key\n"); | |
81 | ecryptfs_printk(KERN_DEBUG, | |
82 | " * session_key.encrypted_key_size = [0x%x]\n", | |
83 | auth_tok->session_key.encrypted_key_size); | |
84 | ecryptfs_printk(KERN_DEBUG, " * Encrypted session key " | |
85 | "dump:\n"); | |
86 | if (ecryptfs_verbosity > 0) | |
87 | ecryptfs_dump_hex(auth_tok->session_key.encrypted_key, | |
88 | auth_tok->session_key. | |
89 | encrypted_key_size); | |
90 | } | |
91 | } | |
92 | ||
93 | /** | |
94 | * ecryptfs_dump_hex - debug hex printer | |
95 | * @data: string of bytes to be printed | |
96 | * @bytes: number of bytes to print | |
97 | * | |
98 | * Dump hexadecimal representation of char array | |
99 | */ | |
100 | void ecryptfs_dump_hex(char *data, int bytes) | |
101 | { | |
102 | int i = 0; | |
103 | int add_newline = 1; | |
104 | ||
105 | if (ecryptfs_verbosity < 1) | |
106 | return; | |
107 | if (bytes != 0) { | |
108 | printk(KERN_DEBUG "0x%.2x.", (unsigned char)data[i]); | |
109 | i++; | |
110 | } | |
111 | while (i < bytes) { | |
112 | printk("0x%.2x.", (unsigned char)data[i]); | |
113 | i++; | |
114 | if (i % 16 == 0) { | |
115 | printk("\n"); | |
116 | add_newline = 0; | |
117 | } else | |
118 | add_newline = 1; | |
119 | } | |
120 | if (add_newline) | |
121 | printk("\n"); | |
122 | } | |
123 |