| Michael Halcrow | 237fead | 2006-10-04 02:16:22 -0700 | [diff] [blame] | 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 | |