// SPDX-License-Identifier: GPL-2.0-or-later/* * 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> */ #include <linux/string.h>#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);		ecryptfs_printk(KERN_DEBUG, " * salt = [%s]\n", salt);		if (auth_tok->token.password.flags &		    ECRYPTFS_PERSISTENT_PASSWORD) {			ecryptfs_printk(KERN_DEBUG, " * persistent\n");		}		strscpy(sig, auth_tok->token.password.signature);		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){	if (ecryptfs_verbosity < 1)		return; 	print_hex_dump(KERN_DEBUG, "ecryptfs: ", DUMP_PREFIX_OFFSET, 16, 1,		       data, bytes, false);}