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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * eCryptfs: Linux filesystem encryption layer4 * Functions only useful for debugging.5 *6 * Copyright (C) 2006 International Business Machines Corp.7 * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>8 */9 10#include "ecryptfs_kernel.h"11 12/*13 * ecryptfs_dump_auth_tok - debug function to print auth toks14 *15 * This function will print the contents of an ecryptfs authentication16 * token.17 */18void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok)19{20 char salt[ECRYPTFS_SALT_SIZE * 2 + 1];21 char sig[ECRYPTFS_SIG_SIZE_HEX + 1];22 23 ecryptfs_printk(KERN_DEBUG, "Auth tok at mem loc [%p]:\n",24 auth_tok);25 if (auth_tok->flags & ECRYPTFS_PRIVATE_KEY) {26 ecryptfs_printk(KERN_DEBUG, " * private key type\n");27 } else {28 ecryptfs_printk(KERN_DEBUG, " * passphrase type\n");29 ecryptfs_to_hex(salt, auth_tok->token.password.salt,30 ECRYPTFS_SALT_SIZE);31 salt[ECRYPTFS_SALT_SIZE * 2] = '\0';32 ecryptfs_printk(KERN_DEBUG, " * salt = [%s]\n", salt);33 if (auth_tok->token.password.flags &34 ECRYPTFS_PERSISTENT_PASSWORD) {35 ecryptfs_printk(KERN_DEBUG, " * persistent\n");36 }37 memcpy(sig, auth_tok->token.password.signature,38 ECRYPTFS_SIG_SIZE_HEX);39 sig[ECRYPTFS_SIG_SIZE_HEX] = '\0';40 ecryptfs_printk(KERN_DEBUG, " * signature = [%s]\n", sig);41 }42 ecryptfs_printk(KERN_DEBUG, " * session_key.flags = [0x%x]\n",43 auth_tok->session_key.flags);44 if (auth_tok->session_key.flags45 & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT)46 ecryptfs_printk(KERN_DEBUG,47 " * Userspace decrypt request set\n");48 if (auth_tok->session_key.flags49 & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT)50 ecryptfs_printk(KERN_DEBUG,51 " * Userspace encrypt request set\n");52 if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_DECRYPTED_KEY) {53 ecryptfs_printk(KERN_DEBUG, " * Contains decrypted key\n");54 ecryptfs_printk(KERN_DEBUG,55 " * session_key.decrypted_key_size = [0x%x]\n",56 auth_tok->session_key.decrypted_key_size);57 ecryptfs_printk(KERN_DEBUG, " * Decrypted session key "58 "dump:\n");59 if (ecryptfs_verbosity > 0)60 ecryptfs_dump_hex(auth_tok->session_key.decrypted_key,61 ECRYPTFS_DEFAULT_KEY_BYTES);62 }63 if (auth_tok->session_key.flags & ECRYPTFS_CONTAINS_ENCRYPTED_KEY) {64 ecryptfs_printk(KERN_DEBUG, " * Contains encrypted key\n");65 ecryptfs_printk(KERN_DEBUG,66 " * session_key.encrypted_key_size = [0x%x]\n",67 auth_tok->session_key.encrypted_key_size);68 ecryptfs_printk(KERN_DEBUG, " * Encrypted session key "69 "dump:\n");70 if (ecryptfs_verbosity > 0)71 ecryptfs_dump_hex(auth_tok->session_key.encrypted_key,72 auth_tok->session_key.73 encrypted_key_size);74 }75}76 77/**78 * ecryptfs_dump_hex - debug hex printer79 * @data: string of bytes to be printed80 * @bytes: number of bytes to print81 *82 * Dump hexadecimal representation of char array83 */84void ecryptfs_dump_hex(char *data, int bytes)85{86 if (ecryptfs_verbosity < 1)87 return;88 89 print_hex_dump(KERN_DEBUG, "ecryptfs: ", DUMP_PREFIX_OFFSET, 16, 1,90 data, bytes, false);91}92