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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 (auth_tok->flags & ECRYPTFS_PRIVATE_KEY) { |
40 | ecryptfs_printk(KERN_DEBUG, " * private key type\n"); |
41 | } else { |
42 | ecryptfs_printk(KERN_DEBUG, " * passphrase type\n"); |
43 | ecryptfs_to_hex(salt, auth_tok->token.password.salt, |
44 | ECRYPTFS_SALT_SIZE); |
45 | salt[ECRYPTFS_SALT_SIZE * 2] = '\0'; |
46 | ecryptfs_printk(KERN_DEBUG, " * salt = [%s]\n", salt); |
47 | if (auth_tok->token.password.flags & |
48 | ECRYPTFS_PERSISTENT_PASSWORD) { |
49 | ecryptfs_printk(KERN_DEBUG, " * persistent\n"); |
50 | } |
51 | memcpy(sig, auth_tok->token.password.signature, |
52 | ECRYPTFS_SIG_SIZE_HEX); |
53 | sig[ECRYPTFS_SIG_SIZE_HEX] = '\0'; |
54 | ecryptfs_printk(KERN_DEBUG, " * signature = [%s]\n", sig); |
55 | } |
56 | ecryptfs_printk(KERN_DEBUG, " * session_key.flags = [0x%x]\n", |
57 | auth_tok->session_key.flags); |
58 | if (auth_tok->session_key.flags |
59 | & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT) |
60 | ecryptfs_printk(KERN_DEBUG, |
61 | " * Userspace decrypt request set\n"); |
62 | if (auth_tok->session_key.flags |
63 | & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT) |
64 | ecryptfs_printk(KERN_DEBUG, |
65 | " * Userspace encrypt request set\n"); |
66 | if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_DECRYPTED_KEY) { |
67 | ecryptfs_printk(KERN_DEBUG, " * Contains decrypted key\n"); |
68 | ecryptfs_printk(KERN_DEBUG, |
69 | " * session_key.decrypted_key_size = [0x%x]\n", |
70 | auth_tok->session_key.decrypted_key_size); |
71 | ecryptfs_printk(KERN_DEBUG, " * Decrypted session key " |
72 | "dump:\n"); |
73 | if (ecryptfs_verbosity > 0) |
74 | ecryptfs_dump_hex(auth_tok->session_key.decrypted_key, |
75 | ECRYPTFS_DEFAULT_KEY_BYTES); |
76 | } |
77 | if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_ENCRYPTED_KEY) { |
78 | ecryptfs_printk(KERN_DEBUG, " * Contains encrypted key\n"); |
79 | ecryptfs_printk(KERN_DEBUG, |
80 | " * session_key.encrypted_key_size = [0x%x]\n", |
81 | auth_tok->session_key.encrypted_key_size); |
82 | ecryptfs_printk(KERN_DEBUG, " * Encrypted session key " |
83 | "dump:\n"); |
84 | if (ecryptfs_verbosity > 0) |
85 | ecryptfs_dump_hex(auth_tok->session_key.encrypted_key, |
86 | auth_tok->session_key. |
87 | encrypted_key_size); |
88 | } |
89 | } |
90 | |
91 | /** |
92 | * ecryptfs_dump_hex - debug hex printer |
93 | * @data: string of bytes to be printed |
94 | * @bytes: number of bytes to print |
95 | * |
96 | * Dump hexadecimal representation of char array |
97 | */ |
98 | void ecryptfs_dump_hex(char *data, int bytes) |
99 | { |
100 | int i = 0; |
101 | int add_newline = 1; |
102 | |
103 | if (ecryptfs_verbosity < 1) |
104 | return; |
105 | if (bytes != 0) { |
106 | printk(KERN_DEBUG "0x%.2x.", (unsigned char)data[i]); |
107 | i++; |
108 | } |
109 | while (i < bytes) { |
110 | printk("0x%.2x.", (unsigned char)data[i]); |
111 | i++; |
112 | if (i % 16 == 0) { |
113 | printk("\n"); |
114 | add_newline = 0; |
115 | } else |
116 | add_newline = 1; |
117 | } |
118 | if (add_newline) |
119 | printk("\n"); |
120 | } |
121 | |
122 |
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