diff options
Diffstat (limited to 'fs/ecryptfs/debug.c')
| -rw-r--r-- | fs/ecryptfs/debug.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/fs/ecryptfs/debug.c b/fs/ecryptfs/debug.c new file mode 100644 index 00000000..3d2bdf54 --- /dev/null +++ b/fs/ecryptfs/debug.c @@ -0,0 +1,121 @@ +/** + * eCryptfs: Linux filesystem encryption layer + * Functions only useful for debugging. + * + * Copyright (C) 2006 International Business Machines Corp. + * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ + +#include "ecryptfs_kernel.h" + +/** + * ecryptfs_dump_auth_tok - debug function to print auth toks + * + * This function will print the contents of an ecryptfs authentication + * token. + */ +void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok) +{ + char salt[ECRYPTFS_SALT_SIZE * 2 + 1]; + char sig[ECRYPTFS_SIG_SIZE_HEX + 1]; + + ecryptfs_printk(KERN_DEBUG, "Auth tok at mem loc [%p]:\n", + auth_tok); + if (auth_tok->flags & ECRYPTFS_PRIVATE_KEY) { + ecryptfs_printk(KERN_DEBUG, " * private key type\n"); + } else { + ecryptfs_printk(KERN_DEBUG, " * passphrase type\n"); + ecryptfs_to_hex(salt, auth_tok->token.password.salt, + ECRYPTFS_SALT_SIZE); + salt[ECRYPTFS_SALT_SIZE * 2] = '\0'; + ecryptfs_printk(KERN_DEBUG, " * salt = [%s]\n", salt); + if (auth_tok->token.password.flags & + ECRYPTFS_PERSISTENT_PASSWORD) { + ecryptfs_printk(KERN_DEBUG, " * persistent\n"); + } + memcpy(sig, auth_tok->token.password.signature, + ECRYPTFS_SIG_SIZE_HEX); + sig[ECRYPTFS_SIG_SIZE_HEX] = '\0'; + ecryptfs_printk(KERN_DEBUG, " * signature = [%s]\n", sig); + } + ecryptfs_printk(KERN_DEBUG, " * session_key.flags = [0x%x]\n", + auth_tok->session_key.flags); + if (auth_tok->session_key.flags + & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT) + ecryptfs_printk(KERN_DEBUG, + " * Userspace decrypt request set\n"); + if (auth_tok->session_key.flags + & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT) + ecryptfs_printk(KERN_DEBUG, + " * Userspace encrypt request set\n"); + if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_DECRYPTED_KEY) { + ecryptfs_printk(KERN_DEBUG, " * Contains decrypted key\n"); + ecryptfs_printk(KERN_DEBUG, + " * session_key.decrypted_key_size = [0x%x]\n", + auth_tok->session_key.decrypted_key_size); + ecryptfs_printk(KERN_DEBUG, " * Decrypted session key " + "dump:\n"); + if (ecryptfs_verbosity > 0) + ecryptfs_dump_hex(auth_tok->session_key.decrypted_key, + ECRYPTFS_DEFAULT_KEY_BYTES); + } + if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_ENCRYPTED_KEY) { + ecryptfs_printk(KERN_DEBUG, " * Contains encrypted key\n"); + ecryptfs_printk(KERN_DEBUG, + " * session_key.encrypted_key_size = [0x%x]\n", + auth_tok->session_key.encrypted_key_size); + ecryptfs_printk(KERN_DEBUG, " * Encrypted session key " + "dump:\n"); + if (ecryptfs_verbosity > 0) + ecryptfs_dump_hex(auth_tok->session_key.encrypted_key, + auth_tok->session_key. + encrypted_key_size); + } +} + +/** + * ecryptfs_dump_hex - debug hex printer + * @data: string of bytes to be printed + * @bytes: number of bytes to print + * + * Dump hexadecimal representation of char array + */ +void ecryptfs_dump_hex(char *data, int bytes) +{ + int i = 0; + int add_newline = 1; + + if (ecryptfs_verbosity < 1) + return; + if (bytes != 0) { + printk(KERN_DEBUG "0x%.2x.", (unsigned char)data[i]); + i++; + } + while (i < bytes) { + printk("0x%.2x.", (unsigned char)data[i]); + i++; + if (i % 16 == 0) { + printk("\n"); + add_newline = 0; + } else + add_newline = 1; + } + if (add_newline) + printk("\n"); +} + |