1 /* $OpenBSD: xform.c,v 1.16 2001/08/28 12:20:43 ben Exp $ */ 2 /*- 3 * The authors of this code are John Ioannidis (ji@tla.org), 4 * Angelos D. Keromytis (kermit@csd.uch.gr), 5 * Niels Provos (provos@physnet.uni-hamburg.de) and 6 * Damien Miller (djm@mindrot.org). 7 * 8 * This code was written by John Ioannidis for BSD/OS in Athens, Greece, 9 * in November 1995. 10 * 11 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, 12 * by Angelos D. Keromytis. 13 * 14 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis 15 * and Niels Provos. 16 * 17 * Additional features in 1999 by Angelos D. Keromytis. 18 * 19 * AES XTS implementation in 2008 by Damien Miller 20 * 21 * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis, 22 * Angelos D. Keromytis and Niels Provos. 23 * 24 * Copyright (C) 2001, Angelos D. Keromytis. 25 * 26 * Copyright (C) 2008, Damien Miller 27 * Copyright (c) 2014 The FreeBSD Foundation 28 * All rights reserved. 29 * 30 * Portions of this software were developed by John-Mark Gurney 31 * under sponsorship of the FreeBSD Foundation and 32 * Rubicon Communications, LLC (Netgate). 33 * 34 * Permission to use, copy, and modify this software with or without fee 35 * is hereby granted, provided that this entire notice is included in 36 * all copies of any software which is or includes a copy or 37 * modification of this software. 38 * You may use this code under the GNU public license if you so wish. Please 39 * contribute changes back to the authors under this freer than GPL license 40 * so that we may further the use of strong encryption without limitations to 41 * all. 42 * 43 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 44 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 45 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 46 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 47 * PURPOSE. 48 */ 49 50 #include <sys/cdefs.h> 51 __FBSDID("$FreeBSD$"); 52 53 #include <crypto/camellia/camellia.h> 54 #include <opencrypto/xform_enc.h> 55 56 static int cml_setkey(u_int8_t **, u_int8_t *, int); 57 static void cml_encrypt(caddr_t, u_int8_t *); 58 static void cml_decrypt(caddr_t, u_int8_t *); 59 static void cml_zerokey(u_int8_t **); 60 61 /* Encryption instances */ 62 struct enc_xform enc_xform_camellia = { 63 CRYPTO_CAMELLIA_CBC, "Camellia", 64 CAMELLIA_BLOCK_LEN, CAMELLIA_BLOCK_LEN, CAMELLIA_MIN_KEY, 65 CAMELLIA_MAX_KEY, 66 cml_encrypt, 67 cml_decrypt, 68 cml_setkey, 69 cml_zerokey, 70 NULL, 71 }; 72 73 /* 74 * Encryption wrapper routines. 75 */ 76 static void 77 cml_encrypt(caddr_t key, u_int8_t *blk) 78 { 79 camellia_encrypt((camellia_ctx *) key, (u_char *) blk, (u_char *) blk); 80 } 81 82 static void 83 cml_decrypt(caddr_t key, u_int8_t *blk) 84 { 85 camellia_decrypt(((camellia_ctx *) key), (u_char *) blk, 86 (u_char *) blk); 87 } 88 89 static int 90 cml_setkey(u_int8_t **sched, u_int8_t *key, int len) 91 { 92 int err; 93 94 if (len != 16 && len != 24 && len != 32) 95 return (EINVAL); 96 *sched = KMALLOC(sizeof(camellia_ctx), M_CRYPTO_DATA, 97 M_NOWAIT|M_ZERO); 98 if (*sched != NULL) { 99 camellia_set_key((camellia_ctx *) *sched, (u_char *) key, 100 len * 8); 101 err = 0; 102 } else 103 err = ENOMEM; 104 return err; 105 } 106 107 static void 108 cml_zerokey(u_int8_t **sched) 109 { 110 bzero(*sched, sizeof(camellia_ctx)); 111 KFREE(*sched, M_CRYPTO_DATA); 112 *sched = NULL; 113 } 114