projects / mirror_qemu.git / blame
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|---|---|---|
| 84f7f180 DB |
1 | /* |
| 2 | * QEMU Crypto XTS cipher mode | |
| 3 | * | |
| 4 | * Copyright (c) 2015-2016 Red Hat, Inc. | |
| 5 | * | |
| 6 | * This library is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * This library is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
| 18 | * | |
| 19 | * This code is originally derived from public domain / WTFPL code in | |
| 20 | * LibTomCrypt crytographic library http://libtom.org. The XTS code | |
| 21 | * was donated by Elliptic Semiconductor Inc (www.ellipticsemi.com) | |
| 22 | * to the LibTom Projects | |
| 23 | * | |
| 24 | */ | |
| 25 | ||
| 2a6a4076 MA |
26 | #ifndef QCRYPTO_XTS_H |
| 27 | #define QCRYPTO_XTS_H | |
| 84f7f180 DB |
28 | |
| 29 | #include "qemu-common.h" | |
| 30 | #include "qapi/error.h" | |
| 31 | ||
| 32 | ||
| 33 | #define XTS_BLOCK_SIZE 16 | |
| 34 | ||
| 35 | typedef void xts_cipher_func(const void *ctx, | |
| 36 | size_t length, | |
| 37 | uint8_t *dst, | |
| 38 | const uint8_t *src); | |
| 39 | ||
| 40 | /** | |
| 41 | * xts_decrypt: | |
| 42 | * @datactx: the cipher context for data decryption | |
| 43 | * @tweakctx: the cipher context for tweak decryption | |
| 44 | * @encfunc: the cipher function for encryption | |
| 45 | * @decfunc: the cipher function for decryption | |
| 46 | * @iv: the initialization vector tweak of XTS_BLOCK_SIZE bytes | |
| 47 | * @length: the length of @dst and @src | |
| 48 | * @dst: buffer to hold the decrypted plaintext | |
| 49 | * @src: buffer providing the ciphertext | |
| 50 | * | |
| 51 | * Decrypts @src into @dst | |
| 52 | */ | |
| 53 | void xts_decrypt(const void *datactx, | |
| 54 | const void *tweakctx, | |
| 55 | xts_cipher_func *encfunc, | |
| 56 | xts_cipher_func *decfunc, | |
| 57 | uint8_t *iv, | |
| 58 | size_t length, | |
| 59 | uint8_t *dst, | |
| 60 | const uint8_t *src); | |
| 61 | ||
| 62 | /** | |
| 63 | * xts_decrypt: | |
| 64 | * @datactx: the cipher context for data encryption | |
| 65 | * @tweakctx: the cipher context for tweak encryption | |
| 66 | * @encfunc: the cipher function for encryption | |
| 67 | * @decfunc: the cipher function for decryption | |
| 68 | * @iv: the initialization vector tweak of XTS_BLOCK_SIZE bytes | |
| 69 | * @length: the length of @dst and @src | |
| 70 | * @dst: buffer to hold the encrypted ciphertext | |
| 71 | * @src: buffer providing the plaintext | |
| 72 | * | |
| 73 | * Decrypts @src into @dst | |
| 74 | */ | |
| 75 | void xts_encrypt(const void *datactx, | |
| 76 | const void *tweakctx, | |
| 77 | xts_cipher_func *encfunc, | |
| 78 | xts_cipher_func *decfunc, | |
| 79 | uint8_t *iv, | |
| 80 | size_t length, | |
| 81 | uint8_t *dst, | |
| 82 | const uint8_t *src); | |
| 83 | ||
| 84 | ||
| 2a6a4076 | 85 | #endif /* QCRYPTO_XTS_H */ |