cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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debug.c (3044B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * eCryptfs: Linux filesystem encryption layer
      4 * 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 toks
     14 *
     15 * This function will print the contents of an ecryptfs authentication
     16 * 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.flags
     45	    & ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT)
     46		ecryptfs_printk(KERN_DEBUG,
     47				" * Userspace decrypt request set\n");
     48	if (auth_tok->session_key.flags
     49	    & 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 printer
     79 * @data: string of bytes to be printed
     80 * @bytes: number of bytes to print
     81 *
     82 * Dump hexadecimal representation of char array
     83 */
     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}