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716 lines
28 KiB
C++
716 lines
28 KiB
C++
/*
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* QEMU Crypto cipher nettle algorithms
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*
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* Copyright (c) 2015 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 2.1 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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*/
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#ifdef CONFIG_QEMU_PRIVATE_XTS
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#include "crypto/xts.h"
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#endif
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#include <nettle/nettle-types.h>
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#include <nettle/aes.h>
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#include <nettle/des.h>
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#include <nettle/cbc.h>
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#include <nettle/cast128.h>
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#include <nettle/serpent.h>
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#include <nettle/twofish.h>
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#include <nettle/ctr.h>
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#ifndef CONFIG_QEMU_PRIVATE_XTS
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#include <nettle/xts.h>
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#endif
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static inline bool qcrypto_length_check(size_t len, size_t blocksize,
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Error **errp)
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{
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if (unlikely(len & (blocksize - 1))) {
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error_setg(errp, "Length %zu must be a multiple of block size %zu",
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len, blocksize);
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return false;
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}
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return true;
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}
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static void qcrypto_cipher_ctx_free(QCryptoCipher *ctx)
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{
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g_free(ctx);
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}
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static int qcrypto_cipher_no_setiv(QCryptoCipher *cipher,
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const uint8_t *iv, size_t niv,
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Error **errp)
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{
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error_setg(errp, "Setting IV is not supported");
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return -1;
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}
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#define DEFINE_SETIV(NAME, TYPE, BLEN) \
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static int NAME##_setiv(QCryptoCipher *cipher, const uint8_t *iv, \
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size_t niv, Error **errp) \
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{ \
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TYPE *ctx = container_of(cipher, TYPE, base); \
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if (niv != BLEN) { \
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error_setg(errp, "Expected IV size %d not %zu", BLEN, niv); \
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return -1; \
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} \
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memcpy(ctx->iv, iv, niv); \
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return 0; \
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}
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#define DEFINE_ECB(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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static int NAME##_encrypt_ecb(QCryptoCipher *cipher, const void *in, \
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void *out, size_t len, Error **errp) \
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{ \
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TYPE *ctx = container_of(cipher, TYPE, base); \
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if (!qcrypto_length_check(len, BLEN, errp)) { \
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return -1; \
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} \
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ENCRYPT(&ctx->key, len, out, in); \
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return 0; \
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} \
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static int NAME##_decrypt_ecb(QCryptoCipher *cipher, const void *in, \
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void *out, size_t len, Error **errp) \
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{ \
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TYPE *ctx = container_of(cipher, TYPE, base); \
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if (!qcrypto_length_check(len, BLEN, errp)) { \
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return -1; \
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} \
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DECRYPT(&ctx->key, len, out, in); \
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return 0; \
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} \
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static const struct QCryptoCipherDriver NAME##_driver_ecb = { \
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.cipher_encrypt = NAME##_encrypt_ecb, \
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.cipher_decrypt = NAME##_decrypt_ecb, \
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.cipher_setiv = qcrypto_cipher_no_setiv, \
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.cipher_free = qcrypto_cipher_ctx_free, \
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};
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#define DEFINE_CBC(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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static int NAME##_encrypt_cbc(QCryptoCipher *cipher, const void *in, \
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void *out, size_t len, Error **errp) \
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{ \
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TYPE *ctx = container_of(cipher, TYPE, base); \
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if (!qcrypto_length_check(len, BLEN, errp)) { \
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return -1; \
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} \
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cbc_encrypt(&ctx->key, ENCRYPT, BLEN, ctx->iv, len, out, in); \
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return 0; \
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} \
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static int NAME##_decrypt_cbc(QCryptoCipher *cipher, const void *in, \
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void *out, size_t len, Error **errp) \
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{ \
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TYPE *ctx = container_of(cipher, TYPE, base); \
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if (!qcrypto_length_check(len, BLEN, errp)) { \
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return -1; \
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} \
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cbc_decrypt(&ctx->key, DECRYPT, BLEN, ctx->iv, len, out, in); \
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return 0; \
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} \
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static const struct QCryptoCipherDriver NAME##_driver_cbc = { \
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.cipher_encrypt = NAME##_encrypt_cbc, \
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.cipher_decrypt = NAME##_decrypt_cbc, \
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.cipher_setiv = NAME##_setiv, \
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.cipher_free = qcrypto_cipher_ctx_free, \
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};
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#define DEFINE_CTR(NAME, TYPE, BLEN, ENCRYPT) \
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static int NAME##_encrypt_ctr(QCryptoCipher *cipher, const void *in, \
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void *out, size_t len, Error **errp) \
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{ \
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TYPE *ctx = container_of(cipher, TYPE, base); \
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if (!qcrypto_length_check(len, BLEN, errp)) { \
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return -1; \
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} \
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ctr_crypt(&ctx->key, ENCRYPT, BLEN, ctx->iv, len, out, in); \
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return 0; \
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} \
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static const struct QCryptoCipherDriver NAME##_driver_ctr = { \
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.cipher_encrypt = NAME##_encrypt_ctr, \
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.cipher_decrypt = NAME##_encrypt_ctr, \
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.cipher_setiv = NAME##_setiv, \
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.cipher_free = qcrypto_cipher_ctx_free, \
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};
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#ifdef CONFIG_QEMU_PRIVATE_XTS
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#define DEFINE__XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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static void NAME##_xts_wrape(const void *ctx, size_t length, \
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uint8_t *dst, const uint8_t *src) \
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{ \
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ENCRYPT((const void *)ctx, length, dst, src); \
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} \
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static void NAME##_xts_wrapd(const void *ctx, size_t length, \
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uint8_t *dst, const uint8_t *src) \
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{ \
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DECRYPT((const void *)ctx, length, dst, src); \
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} \
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static int NAME##_encrypt_xts(QCryptoCipher *cipher, const void *in, \
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void *out, size_t len, Error **errp) \
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{ \
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TYPE *ctx = container_of(cipher, TYPE, base); \
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if (!qcrypto_length_check(len, BLEN, errp)) { \
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return -1; \
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} \
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xts_encrypt(&ctx->key, &ctx->key_xts, \
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NAME##_xts_wrape, NAME##_xts_wrapd, \
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ctx->iv, len, out, in); \
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return 0; \
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} \
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static int NAME##_decrypt_xts(QCryptoCipher *cipher, const void *in, \
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void *out, size_t len, Error **errp) \
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{ \
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TYPE *ctx = container_of(cipher, TYPE, base); \
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if (!qcrypto_length_check(len, BLEN, errp)) { \
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return -1; \
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} \
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xts_decrypt(&ctx->key, &ctx->key_xts, \
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NAME##_xts_wrape, NAME##_xts_wrapd, \
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ctx->iv, len, out, in); \
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return 0; \
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}
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#else
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#define DEFINE__XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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static int NAME##_encrypt_xts(QCryptoCipher *cipher, const void *in, \
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void *out, size_t len, Error **errp) \
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{ \
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TYPE *ctx = container_of(cipher, TYPE, base); \
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if (!qcrypto_length_check(len, BLEN, errp)) { \
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return -1; \
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} \
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xts_encrypt_message(&ctx->key, &ctx->key_xts, ENCRYPT, \
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ctx->iv, len, out, in); \
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return 0; \
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} \
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static int NAME##_decrypt_xts(QCryptoCipher *cipher, const void *in, \
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void *out, size_t len, Error **errp) \
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{ \
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TYPE *ctx = container_of(cipher, TYPE, base); \
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if (!qcrypto_length_check(len, BLEN, errp)) { \
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return -1; \
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} \
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xts_decrypt_message(&ctx->key, &ctx->key_xts, DECRYPT, ENCRYPT, \
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ctx->iv, len, out, in); \
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return 0; \
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}
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#endif
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#define DEFINE_XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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QEMU_BUILD_BUG_ON(BLEN != XTS_BLOCK_SIZE); \
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DEFINE__XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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static const struct QCryptoCipherDriver NAME##_driver_xts = { \
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.cipher_encrypt = NAME##_encrypt_xts, \
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.cipher_decrypt = NAME##_decrypt_xts, \
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.cipher_setiv = NAME##_setiv, \
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.cipher_free = qcrypto_cipher_ctx_free, \
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};
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#define DEFINE_ECB_CBC_CTR(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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DEFINE_SETIV(NAME, TYPE, BLEN) \
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DEFINE_ECB(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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DEFINE_CBC(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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DEFINE_CTR(NAME, TYPE, BLEN, ENCRYPT)
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#define DEFINE_ECB_CBC_CTR_XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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DEFINE_ECB_CBC_CTR(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \
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DEFINE_XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT)
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typedef struct QCryptoNettleDES {
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QCryptoCipher base;
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struct des_ctx key;
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uint8_t iv[DES_BLOCK_SIZE];
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} QCryptoNettleDES;
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static void des_encrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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des_encrypt(ctx, length, dst, src);
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}
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static void des_decrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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des_decrypt(ctx, length, dst, src);
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}
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DEFINE_ECB_CBC_CTR(qcrypto_nettle_des, QCryptoNettleDES,
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DES_BLOCK_SIZE, des_encrypt_native, des_decrypt_native)
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typedef struct QCryptoNettleDES3 {
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QCryptoCipher base;
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struct des3_ctx key;
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uint8_t iv[DES3_BLOCK_SIZE];
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} QCryptoNettleDES3;
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static void des3_encrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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des3_encrypt(ctx, length, dst, src);
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}
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static void des3_decrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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des3_decrypt(ctx, length, dst, src);
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}
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DEFINE_ECB_CBC_CTR(qcrypto_nettle_des3, QCryptoNettleDES3, DES3_BLOCK_SIZE,
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des3_encrypt_native, des3_decrypt_native)
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typedef struct QCryptoNettleAES128 {
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QCryptoCipher base;
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uint8_t iv[AES_BLOCK_SIZE];
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/* First key from pair is encode, second key is decode. */
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struct aes128_ctx key[2], key_xts[2];
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} QCryptoNettleAES128;
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static void aes128_encrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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const struct aes128_ctx *keys = ctx;
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aes128_encrypt(&keys[0], length, dst, src);
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}
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static void aes128_decrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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const struct aes128_ctx *keys = ctx;
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aes128_decrypt(&keys[1], length, dst, src);
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}
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DEFINE_ECB_CBC_CTR_XTS(qcrypto_nettle_aes128,
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QCryptoNettleAES128, AES_BLOCK_SIZE,
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aes128_encrypt_native, aes128_decrypt_native)
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typedef struct QCryptoNettleAES192 {
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QCryptoCipher base;
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uint8_t iv[AES_BLOCK_SIZE];
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/* First key from pair is encode, second key is decode. */
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struct aes192_ctx key[2], key_xts[2];
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} QCryptoNettleAES192;
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static void aes192_encrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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const struct aes192_ctx *keys = ctx;
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aes192_encrypt(&keys[0], length, dst, src);
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}
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static void aes192_decrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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const struct aes192_ctx *keys = ctx;
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aes192_decrypt(&keys[1], length, dst, src);
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}
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DEFINE_ECB_CBC_CTR_XTS(qcrypto_nettle_aes192,
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QCryptoNettleAES192, AES_BLOCK_SIZE,
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aes192_encrypt_native, aes192_decrypt_native)
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typedef struct QCryptoNettleAES256 {
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QCryptoCipher base;
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uint8_t iv[AES_BLOCK_SIZE];
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/* First key from pair is encode, second key is decode. */
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struct aes256_ctx key[2], key_xts[2];
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} QCryptoNettleAES256;
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static void aes256_encrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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const struct aes256_ctx *keys = ctx;
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aes256_encrypt(&keys[0], length, dst, src);
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}
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static void aes256_decrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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const struct aes256_ctx *keys = ctx;
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aes256_decrypt(&keys[1], length, dst, src);
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}
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DEFINE_ECB_CBC_CTR_XTS(qcrypto_nettle_aes256,
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QCryptoNettleAES256, AES_BLOCK_SIZE,
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aes256_encrypt_native, aes256_decrypt_native)
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typedef struct QCryptoNettleCAST128 {
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QCryptoCipher base;
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uint8_t iv[CAST128_BLOCK_SIZE];
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struct cast128_ctx key, key_xts;
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} QCryptoNettleCAST128;
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static void cast128_encrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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cast128_encrypt(ctx, length, dst, src);
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}
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static void cast128_decrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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cast128_decrypt(ctx, length, dst, src);
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}
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DEFINE_ECB_CBC_CTR(qcrypto_nettle_cast128,
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QCryptoNettleCAST128, CAST128_BLOCK_SIZE,
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cast128_encrypt_native, cast128_decrypt_native)
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typedef struct QCryptoNettleSerpent {
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QCryptoCipher base;
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uint8_t iv[SERPENT_BLOCK_SIZE];
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struct serpent_ctx key, key_xts;
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} QCryptoNettleSerpent;
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static void serpent_encrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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serpent_encrypt(ctx, length, dst, src);
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}
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static void serpent_decrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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serpent_decrypt(ctx, length, dst, src);
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}
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DEFINE_ECB_CBC_CTR_XTS(qcrypto_nettle_serpent,
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QCryptoNettleSerpent, SERPENT_BLOCK_SIZE,
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serpent_encrypt_native, serpent_decrypt_native)
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typedef struct QCryptoNettleTwofish {
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QCryptoCipher base;
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uint8_t iv[TWOFISH_BLOCK_SIZE];
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struct twofish_ctx key, key_xts;
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} QCryptoNettleTwofish;
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static void twofish_encrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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twofish_encrypt(ctx, length, dst, src);
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}
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static void twofish_decrypt_native(const void *ctx, size_t length,
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uint8_t *dst, const uint8_t *src)
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{
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twofish_decrypt(ctx, length, dst, src);
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}
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DEFINE_ECB_CBC_CTR_XTS(qcrypto_nettle_twofish,
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QCryptoNettleTwofish, TWOFISH_BLOCK_SIZE,
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twofish_encrypt_native, twofish_decrypt_native)
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bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg,
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QCryptoCipherMode mode)
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{
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switch (alg) {
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case QCRYPTO_CIPHER_ALG_DES:
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case QCRYPTO_CIPHER_ALG_3DES:
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case QCRYPTO_CIPHER_ALG_AES_128:
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case QCRYPTO_CIPHER_ALG_AES_192:
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case QCRYPTO_CIPHER_ALG_AES_256:
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case QCRYPTO_CIPHER_ALG_CAST5_128:
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case QCRYPTO_CIPHER_ALG_SERPENT_128:
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case QCRYPTO_CIPHER_ALG_SERPENT_192:
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case QCRYPTO_CIPHER_ALG_SERPENT_256:
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case QCRYPTO_CIPHER_ALG_TWOFISH_128:
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case QCRYPTO_CIPHER_ALG_TWOFISH_192:
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case QCRYPTO_CIPHER_ALG_TWOFISH_256:
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break;
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default:
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return false;
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}
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switch (mode) {
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case QCRYPTO_CIPHER_MODE_ECB:
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case QCRYPTO_CIPHER_MODE_CBC:
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case QCRYPTO_CIPHER_MODE_XTS:
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case QCRYPTO_CIPHER_MODE_CTR:
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return true;
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default:
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return false;
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}
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}
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static QCryptoCipher *qcrypto_cipher_ctx_new(QCryptoCipherAlgorithm alg,
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QCryptoCipherMode mode,
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const uint8_t *key,
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size_t nkey,
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Error **errp)
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{
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switch (mode) {
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case QCRYPTO_CIPHER_MODE_ECB:
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case QCRYPTO_CIPHER_MODE_CBC:
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case QCRYPTO_CIPHER_MODE_XTS:
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case QCRYPTO_CIPHER_MODE_CTR:
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break;
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default:
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goto bad_cipher_mode;
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}
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if (!qcrypto_cipher_validate_key_length(alg, mode, nkey, errp)) {
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return NULL;
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}
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switch (alg) {
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case QCRYPTO_CIPHER_ALG_DES:
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{
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QCryptoNettleDES *ctx;
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const QCryptoCipherDriver *drv;
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|
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switch (mode) {
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case QCRYPTO_CIPHER_MODE_ECB:
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drv = &qcrypto_nettle_des_driver_ecb;
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break;
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case QCRYPTO_CIPHER_MODE_CBC:
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drv = &qcrypto_nettle_des_driver_cbc;
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break;
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case QCRYPTO_CIPHER_MODE_CTR:
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drv = &qcrypto_nettle_des_driver_ctr;
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break;
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default:
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goto bad_cipher_mode;
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}
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|
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ctx = g_new0(QCryptoNettleDES, 1);
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ctx->base.driver = drv;
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des_set_key(&ctx->key, key);
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return &ctx->base;
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}
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|
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case QCRYPTO_CIPHER_ALG_3DES:
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{
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QCryptoNettleDES3 *ctx;
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const QCryptoCipherDriver *drv;
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|
|
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switch (mode) {
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case QCRYPTO_CIPHER_MODE_ECB:
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drv = &qcrypto_nettle_des3_driver_ecb;
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break;
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case QCRYPTO_CIPHER_MODE_CBC:
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drv = &qcrypto_nettle_des3_driver_cbc;
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break;
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case QCRYPTO_CIPHER_MODE_CTR:
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drv = &qcrypto_nettle_des3_driver_ctr;
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break;
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default:
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goto bad_cipher_mode;
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}
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|
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ctx = g_new0(QCryptoNettleDES3, 1);
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ctx->base.driver = drv;
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des3_set_key(&ctx->key, key);
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return &ctx->base;
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}
|
|
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case QCRYPTO_CIPHER_ALG_AES_128:
|
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{
|
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QCryptoNettleAES128 *ctx = g_new0(QCryptoNettleAES128, 1);
|
|
|
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switch (mode) {
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case QCRYPTO_CIPHER_MODE_ECB:
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ctx->base.driver = &qcrypto_nettle_aes128_driver_ecb;
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break;
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case QCRYPTO_CIPHER_MODE_CBC:
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ctx->base.driver = &qcrypto_nettle_aes128_driver_cbc;
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break;
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case QCRYPTO_CIPHER_MODE_CTR:
|
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ctx->base.driver = &qcrypto_nettle_aes128_driver_ctr;
|
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break;
|
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case QCRYPTO_CIPHER_MODE_XTS:
|
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ctx->base.driver = &qcrypto_nettle_aes128_driver_xts;
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nkey /= 2;
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aes128_set_encrypt_key(&ctx->key_xts[0], key + nkey);
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aes128_set_decrypt_key(&ctx->key_xts[1], key + nkey);
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break;
|
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default:
|
|
g_assert_not_reached();
|
|
}
|
|
aes128_set_encrypt_key(&ctx->key[0], key);
|
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aes128_set_decrypt_key(&ctx->key[1], key);
|
|
|
|
return &ctx->base;
|
|
}
|
|
|
|
case QCRYPTO_CIPHER_ALG_AES_192:
|
|
{
|
|
QCryptoNettleAES192 *ctx = g_new0(QCryptoNettleAES192, 1);
|
|
|
|
switch (mode) {
|
|
case QCRYPTO_CIPHER_MODE_ECB:
|
|
ctx->base.driver = &qcrypto_nettle_aes192_driver_ecb;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_CBC:
|
|
ctx->base.driver = &qcrypto_nettle_aes192_driver_cbc;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_CTR:
|
|
ctx->base.driver = &qcrypto_nettle_aes192_driver_ctr;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_XTS:
|
|
ctx->base.driver = &qcrypto_nettle_aes192_driver_xts;
|
|
nkey /= 2;
|
|
aes192_set_encrypt_key(&ctx->key_xts[0], key + nkey);
|
|
aes192_set_decrypt_key(&ctx->key_xts[1], key + nkey);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
aes192_set_encrypt_key(&ctx->key[0], key);
|
|
aes192_set_decrypt_key(&ctx->key[1], key);
|
|
|
|
return &ctx->base;
|
|
}
|
|
|
|
case QCRYPTO_CIPHER_ALG_AES_256:
|
|
{
|
|
QCryptoNettleAES256 *ctx = g_new0(QCryptoNettleAES256, 1);
|
|
|
|
switch (mode) {
|
|
case QCRYPTO_CIPHER_MODE_ECB:
|
|
ctx->base.driver = &qcrypto_nettle_aes256_driver_ecb;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_CBC:
|
|
ctx->base.driver = &qcrypto_nettle_aes256_driver_cbc;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_CTR:
|
|
ctx->base.driver = &qcrypto_nettle_aes256_driver_ctr;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_XTS:
|
|
ctx->base.driver = &qcrypto_nettle_aes256_driver_xts;
|
|
nkey /= 2;
|
|
aes256_set_encrypt_key(&ctx->key_xts[0], key + nkey);
|
|
aes256_set_decrypt_key(&ctx->key_xts[1], key + nkey);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
aes256_set_encrypt_key(&ctx->key[0], key);
|
|
aes256_set_decrypt_key(&ctx->key[1], key);
|
|
|
|
return &ctx->base;
|
|
}
|
|
|
|
case QCRYPTO_CIPHER_ALG_CAST5_128:
|
|
{
|
|
QCryptoNettleCAST128 *ctx;
|
|
const QCryptoCipherDriver *drv;
|
|
|
|
switch (mode) {
|
|
case QCRYPTO_CIPHER_MODE_ECB:
|
|
drv = &qcrypto_nettle_cast128_driver_ecb;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_CBC:
|
|
drv = &qcrypto_nettle_cast128_driver_cbc;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_CTR:
|
|
drv = &qcrypto_nettle_cast128_driver_ctr;
|
|
break;
|
|
default:
|
|
goto bad_cipher_mode;
|
|
}
|
|
|
|
ctx = g_new0(QCryptoNettleCAST128, 1);
|
|
ctx->base.driver = drv;
|
|
cast5_set_key(&ctx->key, nkey, key);
|
|
|
|
return &ctx->base;
|
|
}
|
|
|
|
case QCRYPTO_CIPHER_ALG_SERPENT_128:
|
|
case QCRYPTO_CIPHER_ALG_SERPENT_192:
|
|
case QCRYPTO_CIPHER_ALG_SERPENT_256:
|
|
{
|
|
QCryptoNettleSerpent *ctx = g_new0(QCryptoNettleSerpent, 1);
|
|
|
|
switch (mode) {
|
|
case QCRYPTO_CIPHER_MODE_ECB:
|
|
ctx->base.driver = &qcrypto_nettle_serpent_driver_ecb;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_CBC:
|
|
ctx->base.driver = &qcrypto_nettle_serpent_driver_cbc;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_CTR:
|
|
ctx->base.driver = &qcrypto_nettle_serpent_driver_ctr;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_XTS:
|
|
ctx->base.driver = &qcrypto_nettle_serpent_driver_xts;
|
|
nkey /= 2;
|
|
serpent_set_key(&ctx->key_xts, nkey, key + nkey);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
serpent_set_key(&ctx->key, nkey, key);
|
|
|
|
return &ctx->base;
|
|
}
|
|
|
|
case QCRYPTO_CIPHER_ALG_TWOFISH_128:
|
|
case QCRYPTO_CIPHER_ALG_TWOFISH_192:
|
|
case QCRYPTO_CIPHER_ALG_TWOFISH_256:
|
|
{
|
|
QCryptoNettleTwofish *ctx = g_new0(QCryptoNettleTwofish, 1);
|
|
|
|
switch (mode) {
|
|
case QCRYPTO_CIPHER_MODE_ECB:
|
|
ctx->base.driver = &qcrypto_nettle_twofish_driver_ecb;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_CBC:
|
|
ctx->base.driver = &qcrypto_nettle_twofish_driver_cbc;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_CTR:
|
|
ctx->base.driver = &qcrypto_nettle_twofish_driver_ctr;
|
|
break;
|
|
case QCRYPTO_CIPHER_MODE_XTS:
|
|
ctx->base.driver = &qcrypto_nettle_twofish_driver_xts;
|
|
nkey /= 2;
|
|
twofish_set_key(&ctx->key_xts, nkey, key + nkey);
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
twofish_set_key(&ctx->key, nkey, key);
|
|
|
|
return &ctx->base;
|
|
}
|
|
|
|
default:
|
|
error_setg(errp, "Unsupported cipher algorithm %s",
|
|
QCryptoCipherAlgorithm_str(alg));
|
|
return NULL;
|
|
}
|
|
|
|
bad_cipher_mode:
|
|
error_setg(errp, "Unsupported cipher mode %s",
|
|
QCryptoCipherMode_str(mode));
|
|
return NULL;
|
|
}
|