122 lines
3.8 KiB
C
122 lines
3.8 KiB
C
/**
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* eCryptfs: Linux filesystem encryption layer
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* Functions only useful for debugging.
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*
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* Copyright (C) 2006 International Business Machines Corp.
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* Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#include "ecryptfs_kernel.h"
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/**
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* ecryptfs_dump_auth_tok - debug function to print auth toks
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*
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* This function will print the contents of an ecryptfs authentication
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* token.
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*/
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void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok)
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{
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char salt[ECRYPTFS_SALT_SIZE * 2 + 1];
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char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
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ecryptfs_printk(KERN_DEBUG, "Auth tok at mem loc [%p]:\n",
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auth_tok);
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if (auth_tok->flags & ECRYPTFS_PRIVATE_KEY) {
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ecryptfs_printk(KERN_DEBUG, " * private key type\n");
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} else {
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ecryptfs_printk(KERN_DEBUG, " * passphrase type\n");
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ecryptfs_to_hex(salt, auth_tok->token.password.salt,
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ECRYPTFS_SALT_SIZE);
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salt[ECRYPTFS_SALT_SIZE * 2] = '\0';
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ecryptfs_printk(KERN_DEBUG, " * salt = [%s]\n", salt);
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if (auth_tok->token.password.flags &
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ECRYPTFS_PERSISTENT_PASSWORD) {
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ecryptfs_printk(KERN_DEBUG, " * persistent\n");
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}
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memcpy(sig, auth_tok->token.password.signature,
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ECRYPTFS_SIG_SIZE_HEX);
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sig[ECRYPTFS_SIG_SIZE_HEX] = '\0';
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ecryptfs_printk(KERN_DEBUG, " * signature = [%s]\n", sig);
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}
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ecryptfs_printk(KERN_DEBUG, " * session_key.flags = [0x%x]\n",
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auth_tok->session_key.flags);
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if (auth_tok->session_key.flags
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& ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT)
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ecryptfs_printk(KERN_DEBUG,
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" * Userspace decrypt request set\n");
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if (auth_tok->session_key.flags
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& ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT)
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ecryptfs_printk(KERN_DEBUG,
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" * Userspace encrypt request set\n");
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if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_DECRYPTED_KEY) {
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ecryptfs_printk(KERN_DEBUG, " * Contains decrypted key\n");
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ecryptfs_printk(KERN_DEBUG,
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" * session_key.decrypted_key_size = [0x%x]\n",
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auth_tok->session_key.decrypted_key_size);
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ecryptfs_printk(KERN_DEBUG, " * Decrypted session key "
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"dump:\n");
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if (ecryptfs_verbosity > 0)
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ecryptfs_dump_hex(auth_tok->session_key.decrypted_key,
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ECRYPTFS_DEFAULT_KEY_BYTES);
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}
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if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_ENCRYPTED_KEY) {
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ecryptfs_printk(KERN_DEBUG, " * Contains encrypted key\n");
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ecryptfs_printk(KERN_DEBUG,
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" * session_key.encrypted_key_size = [0x%x]\n",
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auth_tok->session_key.encrypted_key_size);
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ecryptfs_printk(KERN_DEBUG, " * Encrypted session key "
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"dump:\n");
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if (ecryptfs_verbosity > 0)
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ecryptfs_dump_hex(auth_tok->session_key.encrypted_key,
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auth_tok->session_key.
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encrypted_key_size);
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}
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}
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/**
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* ecryptfs_dump_hex - debug hex printer
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* @data: string of bytes to be printed
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* @bytes: number of bytes to print
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*
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* Dump hexadecimal representation of char array
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*/
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void ecryptfs_dump_hex(char *data, int bytes)
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{
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int i = 0;
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int add_newline = 1;
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if (ecryptfs_verbosity < 1)
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return;
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if (bytes != 0) {
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printk(KERN_DEBUG "0x%.2x.", (unsigned char)data[i]);
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i++;
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}
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while (i < bytes) {
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printk("0x%.2x.", (unsigned char)data[i]);
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i++;
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if (i % 16 == 0) {
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printk("\n");
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add_newline = 0;
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} else
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add_newline = 1;
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}
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if (add_newline)
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printk("\n");
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}
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