/* * ecryptfs_format.c: helper functions for the encrypted key type * * Copyright (C) 2006 International Business Machines Corp. * Copyright (C) 2010 Politecnico di Torino, Italy * TORSEC group -- http://security.polito.it * * Authors: * Michael A. Halcrow * Tyler Hicks * Roberto Sassu * * 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, version 2 of the License. */ #include #include "ecryptfs_format.h" u8 *ecryptfs_get_auth_tok_key(struct ecryptfs_auth_tok *auth_tok) { return auth_tok->token.password.session_key_encryption_key; } EXPORT_SYMBOL(ecryptfs_get_auth_tok_key); /* * ecryptfs_get_versions() * * Source code taken from the software 'ecryptfs-utils' version 83. * */ void ecryptfs_get_versions(int *major, int *minor, int *file_version) { *major = ECRYPTFS_VERSION_MAJOR; *minor = ECRYPTFS_VERSION_MINOR; if (file_version) *file_version = ECRYPTFS_SUPPORTED_FILE_VERSION; } EXPORT_SYMBOL(ecryptfs_get_versions); /* * ecryptfs_fill_auth_tok - fill the ecryptfs_auth_tok structure * * Fill the ecryptfs_auth_tok structure with required ecryptfs data. * The source code is inspired to the original function generate_payload() * shipped with the software 'ecryptfs-utils' version 83. * */ int ecryptfs_fill_auth_tok(struct ecryptfs_auth_tok *auth_tok, const char *key_desc) { int major, minor; ecryptfs_get_versions(&major, &minor, NULL); auth_tok->version = (((uint16_t)(major << 8) & 0xFF00) | ((uint16_t)minor & 0x00FF)); auth_tok->token_type = ECRYPTFS_PASSWORD; strncpy((char *)auth_tok->token.password.signature, key_desc, ECRYPTFS_PASSWORD_SIG_SIZE); auth_tok->token.password.session_key_encryption_key_bytes = ECRYPTFS_MAX_KEY_BYTES; /* * Removed auth_tok->token.password.salt and * auth_tok->token.password.session_key_encryption_key * initialization from the original code */ /* TODO: Make the hash parameterizable via policy */ auth_tok->token.password.flags |= ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET; /* The kernel code will encrypt the session key. */ auth_tok->session_key.encrypted_key[0] = 0; auth_tok->session_key.encrypted_key_size = 0; /* Default; subject to change by kernel eCryptfs */ auth_tok->token.password.hash_algo = PGP_DIGEST_ALGO_SHA512; auth_tok->token.password.flags &= ~(ECRYPTFS_PERSISTENT_PASSWORD); return 0; } EXPORT_SYMBOL(ecryptfs_fill_auth_tok); MODULE_LICENSE("GPL"); 7be758f2c07a0c044645edc409a8a388fd'>root/net/sunrpc/auth_gss

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