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 const 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 uint16_t macsize; /* For AEAD ciphers. */ 58 59 /* 60 * Encrypt/decrypt a single block. For stream ciphers this 61 * encrypts/decrypts a single "native" block. 62 */ 63 void (*encrypt) (void *, const uint8_t *, uint8_t *); 64 void (*decrypt) (void *, const uint8_t *, uint8_t *); 65 int (*setkey) (void *, const uint8_t *, int len); 66 void (*reinit) (void *, const uint8_t *, size_t); 67 68 /* 69 * For stream ciphers, encrypt/decrypt the final partial block 70 * of 'len' bytes. 71 */ 72 void (*encrypt_last) (void *, const uint8_t *, uint8_t *, size_t len); 73 void (*decrypt_last) (void *, const uint8_t *, uint8_t *, size_t len); 74 75 /* 76 * For AEAD ciphers, update and generate MAC/tag. 77 */ 78 int (*update) (void *, const void *, u_int); 79 void (*final) (uint8_t *, void *); 80 }; 81 82 83 extern const struct enc_xform enc_xform_null; 84 extern const struct enc_xform enc_xform_rijndael128; 85 extern const struct enc_xform enc_xform_aes_icm; 86 extern const struct enc_xform enc_xform_aes_nist_gcm; 87 extern const struct enc_xform enc_xform_aes_nist_gmac; 88 extern const struct enc_xform enc_xform_aes_xts; 89 extern const struct enc_xform enc_xform_camellia; 90 extern const struct enc_xform enc_xform_chacha20; 91 extern const struct enc_xform enc_xform_chacha20_poly1305; 92 extern const struct enc_xform enc_xform_ccm; 93 94 struct aes_icm_ctx { 95 uint32_t ac_ek[4*(RIJNDAEL_MAXNR + 1)]; 96 /* ac_block is initialized to IV */ 97 uint8_t ac_block[AESICM_BLOCKSIZE]; 98 int ac_nr; 99 }; 100 101 struct aes_xts_ctx { 102 rijndael_ctx key1; 103 rijndael_ctx key2; 104 uint8_t tweak[AES_XTS_BLOCKSIZE]; 105 }; 106 107 #endif /* _CRYPTO_XFORM_ENC_H_ */ 108