1 /* $OpenBSD: xform.h,v 1.8 2001/08/28 12:20:43 ben Exp $ */ 2 3 /*- 4 * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu) 5 * 6 * This code was written by Angelos D. Keromytis in Athens, Greece, in 7 * February 2000. Network Security Technologies Inc. (NSTI) kindly 8 * supported the development of this code. 9 * 10 * Copyright (c) 2000 Angelos D. Keromytis 11 * Copyright (c) 2014 The FreeBSD Foundation 12 * All rights reserved. 13 * 14 * Portions of this software were developed by John-Mark Gurney 15 * under sponsorship of the FreeBSD Foundation and 16 * Rubicon Communications, LLC (Netgate). 17 * 18 * Permission to use, copy, and modify this software without fee 19 * is hereby granted, provided that this entire notice is included in 20 * all source code copies of any software which is or includes a copy or 21 * modification of this software. 22 * 23 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 24 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 25 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 26 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 27 * PURPOSE. 28 */ 29 30 #ifndef _CRYPTO_XFORM_ENC_H_ 31 #define _CRYPTO_XFORM_ENC_H_ 32 33 #include <sys/malloc.h> 34 #include <sys/errno.h> 35 #include <crypto/rijndael/rijndael.h> 36 #include <crypto/camellia/camellia.h> 37 #include <opencrypto/cryptodev.h> 38 #ifdef _STANDALONE 39 #include <stand.h> 40 #endif 41 42 #define AESICM_BLOCKSIZE AES_BLOCK_LEN 43 #define AES_XTS_BLOCKSIZE 16 44 #define AES_XTS_IVSIZE 8 45 #define AES_XTS_ALPHA 0x87 /* GF(2^128) generator polynomial */ 46 47 /* Declarations */ 48 struct enc_xform { 49 int type; 50 char *name; 51 size_t ctxsize; 52 uint16_t blocksize; /* Required input block size -- 1 for stream ciphers. */ 53 uint16_t native_blocksize; /* Used for stream ciphers. */ 54 uint16_t ivsize; 55 uint16_t minkey, maxkey; 56 57 /* 58 * Encrypt/decrypt a single block. For stream ciphers this 59 * encrypts/decrypts a single "native" block. 60 */ 61 void (*encrypt) (void *, const uint8_t *, uint8_t *); 62 void (*decrypt) (void *, const uint8_t *, uint8_t *); 63 int (*setkey) (void *, const uint8_t *, int len); 64 void (*reinit) (void *, const uint8_t *, size_t); 65 66 /* 67 * For stream ciphers, encrypt/decrypt the final partial block 68 * of 'len' bytes. 69 */ 70 void (*encrypt_last) (void *, const uint8_t *, uint8_t *, size_t len); 71 void (*decrypt_last) (void *, const uint8_t *, uint8_t *, size_t len); 72 }; 73 74 75 extern struct enc_xform enc_xform_null; 76 extern struct enc_xform enc_xform_rijndael128; 77 extern struct enc_xform enc_xform_aes_icm; 78 extern struct enc_xform enc_xform_aes_nist_gcm; 79 extern struct enc_xform enc_xform_aes_nist_gmac; 80 extern struct enc_xform enc_xform_aes_xts; 81 extern struct enc_xform enc_xform_camellia; 82 extern struct enc_xform enc_xform_chacha20; 83 extern struct enc_xform enc_xform_chacha20_poly1305; 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_ */ 100