86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/*
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* QEMU Crypto XTS cipher mode
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*
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* Copyright (c) 2015-2016 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* This code is originally derived from public domain / WTFPL code in
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* LibTomCrypt crytographic library http://libtom.org. The XTS code
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* was donated by Elliptic Semiconductor Inc (www.ellipticsemi.com)
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* to the LibTom Projects
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*
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*/
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#ifndef QCRYPTO_XTS_H
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#define QCRYPTO_XTS_H
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#include "qemu-common.h"
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#include "qapi/error.h"
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#define XTS_BLOCK_SIZE 16
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typedef void xts_cipher_func(const void *ctx,
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size_t length,
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uint8_t *dst,
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const uint8_t *src);
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/**
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* xts_decrypt:
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* @datactx: the cipher context for data decryption
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* @tweakctx: the cipher context for tweak decryption
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* @encfunc: the cipher function for encryption
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* @decfunc: the cipher function for decryption
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* @iv: the initialization vector tweak of XTS_BLOCK_SIZE bytes
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* @length: the length of @dst and @src
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* @dst: buffer to hold the decrypted plaintext
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* @src: buffer providing the ciphertext
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*
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* Decrypts @src into @dst
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*/
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void xts_decrypt(const void *datactx,
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const void *tweakctx,
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xts_cipher_func *encfunc,
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xts_cipher_func *decfunc,
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uint8_t *iv,
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size_t length,
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uint8_t *dst,
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const uint8_t *src);
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/**
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* xts_decrypt:
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* @datactx: the cipher context for data encryption
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* @tweakctx: the cipher context for tweak encryption
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* @encfunc: the cipher function for encryption
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* @decfunc: the cipher function for decryption
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* @iv: the initialization vector tweak of XTS_BLOCK_SIZE bytes
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* @length: the length of @dst and @src
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* @dst: buffer to hold the encrypted ciphertext
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* @src: buffer providing the plaintext
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*
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* Decrypts @src into @dst
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*/
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void xts_encrypt(const void *datactx,
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const void *tweakctx,
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xts_cipher_func *encfunc,
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xts_cipher_func *decfunc,
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uint8_t *iv,
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size_t length,
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uint8_t *dst,
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const uint8_t *src);
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#endif /* QCRYPTO_XTS_H */
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