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120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
/* $OpenBSD: xform.h,v 1.8 2001/08/28 12:20:43 ben Exp $ */
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/*-
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* The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu)
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*
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* This code was written by Angelos D. Keromytis in Athens, Greece, in
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* February 2000. Network Security Technologies Inc. (NSTI) kindly
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* supported the development of this code.
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*
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* Copyright (c) 2000 Angelos D. Keromytis
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* Copyright (c) 2014 The FreeBSD Foundation
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* All rights reserved.
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*
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* Portions of this software were developed by John-Mark Gurney
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* under sponsorship of the FreeBSD Foundation and
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* Rubicon Communications, LLC (Netgate).
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*
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* Permission to use, copy, and modify this software without fee
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* is hereby granted, provided that this entire notice is included in
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* all source code copies of any software which is or includes a copy or
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* modification of this software.
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*
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* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
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* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
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* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
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* PURPOSE.
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*/
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#ifndef _CRYPTO_XFORM_ENC_H_
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#define _CRYPTO_XFORM_ENC_H_
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#include <sys/types.h>
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#include <crypto/rijndael/rijndael.h>
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#include <crypto/camellia/camellia.h>
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#include <opencrypto/cryptodev.h>
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#ifdef _STANDALONE
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#include <stand.h>
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#endif
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#define AESICM_BLOCKSIZE AES_BLOCK_LEN
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#define AES_XTS_BLOCKSIZE 16
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#define AES_XTS_IVSIZE 8
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#define AES_XTS_ALPHA 0x87 /* GF(2^128) generator polynomial */
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/* Declarations */
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struct enc_xform {
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int type;
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const char *name;
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size_t ctxsize;
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uint16_t blocksize; /* Required input block size -- 1 for stream ciphers. */
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uint16_t native_blocksize; /* Used for stream ciphers. */
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uint16_t ivsize;
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uint16_t minkey, maxkey;
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uint16_t macsize; /* For AEAD ciphers. */
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/* Initialize context and set key. */
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int (*setkey) (void *, const uint8_t *, int len);
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/* Supply context with nonce/IV. */
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void (*reinit) (void *, const uint8_t *, size_t);
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/*
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* Encrypt/decrypt a single block. For stream ciphers this
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* encrypts/decrypts a single "native" block.
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*/
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void (*encrypt) (void *, const uint8_t *, uint8_t *);
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void (*decrypt) (void *, const uint8_t *, uint8_t *);
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/*
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* Encrypt/decrypt multiple blocks. For stream ciphers this
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* encrypts/decrypts multiple "native" blocks. The fourth
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* argument is a count of bytes.
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*/
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void (*encrypt_multi) (void *, const uint8_t *, uint8_t *, size_t);
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void (*decrypt_multi) (void *, const uint8_t *, uint8_t *, size_t);
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/*
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* For stream ciphers, encrypt/decrypt the final partial block
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* of 'len' bytes.
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*/
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void (*encrypt_last) (void *, const uint8_t *, uint8_t *, size_t len);
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void (*decrypt_last) (void *, const uint8_t *, uint8_t *, size_t len);
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/*
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* For AEAD ciphers, update and generate MAC/tag.
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*/
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int (*update) (void *, const void *, u_int);
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void (*final) (uint8_t *, void *);
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};
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extern const struct enc_xform enc_xform_null;
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extern const struct enc_xform enc_xform_aes_cbc;
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extern const struct enc_xform enc_xform_aes_icm;
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extern const struct enc_xform enc_xform_aes_nist_gcm;
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extern const struct enc_xform enc_xform_aes_nist_gmac;
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extern const struct enc_xform enc_xform_aes_xts;
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extern const struct enc_xform enc_xform_camellia;
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extern const struct enc_xform enc_xform_chacha20;
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extern const struct enc_xform enc_xform_chacha20_poly1305;
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extern const struct enc_xform enc_xform_xchacha20_poly1305;
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extern const struct enc_xform enc_xform_ccm;
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struct aes_icm_ctx {
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uint32_t ac_ek[4*(RIJNDAEL_MAXNR + 1)];
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/* ac_block is initialized to IV */
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uint8_t ac_block[AESICM_BLOCKSIZE];
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int ac_nr;
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};
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struct aes_xts_ctx {
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rijndael_ctx key1;
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rijndael_ctx key2;
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uint8_t tweak[AES_XTS_BLOCKSIZE];
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};
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#endif /* _CRYPTO_XFORM_ENC_H_ */
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