1 /* $FreeBSD$ */
2 /* $OpenBSD: xform.h,v 1.8 2001/08/28 12:20:43 ben Exp $ */
3
4 /*-
5 * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
6 *
7 * This code was written by Angelos D. Keromytis in Athens, Greece, in
8 * February 2000. Network Security Technologies Inc. (NSTI) kindly
9 * supported the development of this code.
10 *
11 * Copyright (c) 2000 Angelos D. Keromytis
12 * Copyright (c) 2014 The FreeBSD Foundation
13 * All rights reserved.
14 *
15 * Portions of this software were developed by John-Mark Gurney
16 * under sponsorship of the FreeBSD Foundation and
17 * Rubicon Communications, LLC (Netgate).
18 *
19 * Permission to use, copy, and modify this software without fee
20 * is hereby granted, provided that this entire notice is included in
21 * all source code copies of any software which is or includes a copy or
22 * modification of this software.
23 *
24 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
25 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
26 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
27 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
28 * PURPOSE.
29 */
30
31 #ifndef _CRYPTO_XFORM_ENC_H_
32 #define _CRYPTO_XFORM_ENC_H_
33
34 #include <sys/malloc.h>
35 #include <sys/errno.h>
36 #include <crypto/rijndael/rijndael.h>
37 #include <crypto/camellia/camellia.h>
38 #include <opencrypto/cryptodev.h>
39 #ifdef _STANDALONE
40 #include <stand.h>
41 #endif
42
43 #define AESICM_BLOCKSIZE AES_BLOCK_LEN
44 #define AES_XTS_BLOCKSIZE 16
45 #define AES_XTS_IVSIZE 8
46 #define AES_XTS_ALPHA 0x87 /* GF(2^128) generator polynomial */
47
48 /* Declarations */
49 struct enc_xform {
50 int type;
51 char *name;
52 size_t ctxsize;
53 uint16_t blocksize; /* Required input block size -- 1 for stream ciphers. */
54 uint16_t native_blocksize; /* Used for stream ciphers. */
55 uint16_t ivsize;
56 uint16_t minkey, maxkey;
57
58 /*
59 * Encrypt/decrypt a single block. For stream ciphers this
60 * encrypts/decrypts a single "native" block.
61 */
62 void (*encrypt) (void *, const uint8_t *, uint8_t *);
63 void (*decrypt) (void *, const uint8_t *, uint8_t *);
64 int (*setkey) (void *, const uint8_t *, int len);
65 void (*reinit) (void *, const uint8_t *);
66
67 /*
68 * For stream ciphers, encrypt/decrypt the final partial block
69 * of 'len' bytes.
70 */
71 void (*encrypt_last) (void *, const uint8_t *, uint8_t *, size_t len);
72 void (*decrypt_last) (void *, const uint8_t *, uint8_t *, size_t len);
73 };
74
75
76 extern struct enc_xform enc_xform_null;
77 extern struct enc_xform enc_xform_rijndael128;
78 extern struct enc_xform enc_xform_aes_icm;
79 extern struct enc_xform enc_xform_aes_nist_gcm;
80 extern struct enc_xform enc_xform_aes_nist_gmac;
81 extern struct enc_xform enc_xform_aes_xts;
82 extern struct enc_xform enc_xform_camellia;
83 extern struct enc_xform enc_xform_chacha20;
84 extern struct enc_xform enc_xform_ccm;
85
86 struct aes_icm_ctx {
87 uint32_t ac_ek[4*(RIJNDAEL_MAXNR + 1)];
88 /* ac_block is initialized to IV */
89 uint8_t ac_block[AESICM_BLOCKSIZE];
90 int ac_nr;
91 };
92
93 struct aes_xts_ctx {
94 rijndael_ctx key1;
95 rijndael_ctx key2;
96 uint8_t tweak[AES_XTS_BLOCKSIZE];
97 };
98
99 #endif /* _CRYPTO_XFORM_ENC_H_ */
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