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