| /* |
| * QEMU Crypto cipher nettle algorithms |
| * |
| * Copyright (c) 2015 Red Hat, Inc. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #ifdef CONFIG_QEMU_PRIVATE_XTS |
| #include "crypto/xts.h" |
| #endif |
| |
| #include <nettle/nettle-types.h> |
| #include <nettle/aes.h> |
| #include <nettle/des.h> |
| #include <nettle/cbc.h> |
| #include <nettle/cast128.h> |
| #include <nettle/serpent.h> |
| #include <nettle/twofish.h> |
| #include <nettle/ctr.h> |
| #ifndef CONFIG_QEMU_PRIVATE_XTS |
| #include <nettle/xts.h> |
| #endif |
| |
| static inline bool qcrypto_length_check(size_t len, size_t blocksize, |
| Error **errp) |
| { |
| if (unlikely(len & (blocksize - 1))) { |
| error_setg(errp, "Length %zu must be a multiple of block size %zu", |
| len, blocksize); |
| return false; |
| } |
| return true; |
| } |
| |
| |
| static void qcrypto_cipher_ctx_free(QCryptoCipher *ctx) |
| { |
| g_free(ctx); |
| } |
| |
| static int qcrypto_cipher_no_setiv(QCryptoCipher *cipher, |
| const uint8_t *iv, size_t niv, |
| Error **errp) |
| { |
| error_setg(errp, "Setting IV is not supported"); |
| return -1; |
| } |
| |
| |
| #define DEFINE_SETIV(NAME, TYPE, BLEN) \ |
| static int NAME##_setiv(QCryptoCipher *cipher, const uint8_t *iv, \ |
| size_t niv, Error **errp) \ |
| { \ |
| TYPE *ctx = container_of(cipher, TYPE, base); \ |
| if (niv != BLEN) { \ |
| error_setg(errp, "Expected IV size %d not %zu", BLEN, niv); \ |
| return -1; \ |
| } \ |
| memcpy(ctx->iv, iv, niv); \ |
| return 0; \ |
| } |
| |
| |
| #define DEFINE_ECB(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| static int NAME##_encrypt_ecb(QCryptoCipher *cipher, const void *in, \ |
| void *out, size_t len, Error **errp) \ |
| { \ |
| TYPE *ctx = container_of(cipher, TYPE, base); \ |
| if (!qcrypto_length_check(len, BLEN, errp)) { \ |
| return -1; \ |
| } \ |
| ENCRYPT(&ctx->key, len, out, in); \ |
| return 0; \ |
| } \ |
| static int NAME##_decrypt_ecb(QCryptoCipher *cipher, const void *in, \ |
| void *out, size_t len, Error **errp) \ |
| { \ |
| TYPE *ctx = container_of(cipher, TYPE, base); \ |
| if (!qcrypto_length_check(len, BLEN, errp)) { \ |
| return -1; \ |
| } \ |
| DECRYPT(&ctx->key, len, out, in); \ |
| return 0; \ |
| } \ |
| static const struct QCryptoCipherDriver NAME##_driver_ecb = { \ |
| .cipher_encrypt = NAME##_encrypt_ecb, \ |
| .cipher_decrypt = NAME##_decrypt_ecb, \ |
| .cipher_setiv = qcrypto_cipher_no_setiv, \ |
| .cipher_free = qcrypto_cipher_ctx_free, \ |
| }; |
| |
| |
| #define DEFINE_CBC(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| static int NAME##_encrypt_cbc(QCryptoCipher *cipher, const void *in, \ |
| void *out, size_t len, Error **errp) \ |
| { \ |
| TYPE *ctx = container_of(cipher, TYPE, base); \ |
| if (!qcrypto_length_check(len, BLEN, errp)) { \ |
| return -1; \ |
| } \ |
| cbc_encrypt(&ctx->key, ENCRYPT, BLEN, ctx->iv, len, out, in); \ |
| return 0; \ |
| } \ |
| static int NAME##_decrypt_cbc(QCryptoCipher *cipher, const void *in, \ |
| void *out, size_t len, Error **errp) \ |
| { \ |
| TYPE *ctx = container_of(cipher, TYPE, base); \ |
| if (!qcrypto_length_check(len, BLEN, errp)) { \ |
| return -1; \ |
| } \ |
| cbc_decrypt(&ctx->key, DECRYPT, BLEN, ctx->iv, len, out, in); \ |
| return 0; \ |
| } \ |
| static const struct QCryptoCipherDriver NAME##_driver_cbc = { \ |
| .cipher_encrypt = NAME##_encrypt_cbc, \ |
| .cipher_decrypt = NAME##_decrypt_cbc, \ |
| .cipher_setiv = NAME##_setiv, \ |
| .cipher_free = qcrypto_cipher_ctx_free, \ |
| }; |
| |
| |
| #define DEFINE_CTR(NAME, TYPE, BLEN, ENCRYPT) \ |
| static int NAME##_encrypt_ctr(QCryptoCipher *cipher, const void *in, \ |
| void *out, size_t len, Error **errp) \ |
| { \ |
| TYPE *ctx = container_of(cipher, TYPE, base); \ |
| if (!qcrypto_length_check(len, BLEN, errp)) { \ |
| return -1; \ |
| } \ |
| ctr_crypt(&ctx->key, ENCRYPT, BLEN, ctx->iv, len, out, in); \ |
| return 0; \ |
| } \ |
| static const struct QCryptoCipherDriver NAME##_driver_ctr = { \ |
| .cipher_encrypt = NAME##_encrypt_ctr, \ |
| .cipher_decrypt = NAME##_encrypt_ctr, \ |
| .cipher_setiv = NAME##_setiv, \ |
| .cipher_free = qcrypto_cipher_ctx_free, \ |
| }; |
| |
| |
| #ifdef CONFIG_QEMU_PRIVATE_XTS |
| #define DEFINE__XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| static void NAME##_xts_wrape(const void *ctx, size_t length, \ |
| uint8_t *dst, const uint8_t *src) \ |
| { \ |
| ENCRYPT((const void *)ctx, length, dst, src); \ |
| } \ |
| static void NAME##_xts_wrapd(const void *ctx, size_t length, \ |
| uint8_t *dst, const uint8_t *src) \ |
| { \ |
| DECRYPT((const void *)ctx, length, dst, src); \ |
| } \ |
| static int NAME##_encrypt_xts(QCryptoCipher *cipher, const void *in, \ |
| void *out, size_t len, Error **errp) \ |
| { \ |
| TYPE *ctx = container_of(cipher, TYPE, base); \ |
| if (!qcrypto_length_check(len, BLEN, errp)) { \ |
| return -1; \ |
| } \ |
| xts_encrypt(&ctx->key, &ctx->key_xts, \ |
| NAME##_xts_wrape, NAME##_xts_wrapd, \ |
| ctx->iv, len, out, in); \ |
| return 0; \ |
| } \ |
| static int NAME##_decrypt_xts(QCryptoCipher *cipher, const void *in, \ |
| void *out, size_t len, Error **errp) \ |
| { \ |
| TYPE *ctx = container_of(cipher, TYPE, base); \ |
| if (!qcrypto_length_check(len, BLEN, errp)) { \ |
| return -1; \ |
| } \ |
| xts_decrypt(&ctx->key, &ctx->key_xts, \ |
| NAME##_xts_wrape, NAME##_xts_wrapd, \ |
| ctx->iv, len, out, in); \ |
| return 0; \ |
| } |
| #else |
| #define DEFINE__XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| static int NAME##_encrypt_xts(QCryptoCipher *cipher, const void *in, \ |
| void *out, size_t len, Error **errp) \ |
| { \ |
| TYPE *ctx = container_of(cipher, TYPE, base); \ |
| if (!qcrypto_length_check(len, BLEN, errp)) { \ |
| return -1; \ |
| } \ |
| xts_encrypt_message(&ctx->key, &ctx->key_xts, ENCRYPT, \ |
| ctx->iv, len, out, in); \ |
| return 0; \ |
| } \ |
| static int NAME##_decrypt_xts(QCryptoCipher *cipher, const void *in, \ |
| void *out, size_t len, Error **errp) \ |
| { \ |
| TYPE *ctx = container_of(cipher, TYPE, base); \ |
| if (!qcrypto_length_check(len, BLEN, errp)) { \ |
| return -1; \ |
| } \ |
| xts_decrypt_message(&ctx->key, &ctx->key_xts, DECRYPT, ENCRYPT, \ |
| ctx->iv, len, out, in); \ |
| return 0; \ |
| } |
| #endif |
| |
| #define DEFINE_XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| QEMU_BUILD_BUG_ON(BLEN != XTS_BLOCK_SIZE); \ |
| DEFINE__XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| static const struct QCryptoCipherDriver NAME##_driver_xts = { \ |
| .cipher_encrypt = NAME##_encrypt_xts, \ |
| .cipher_decrypt = NAME##_decrypt_xts, \ |
| .cipher_setiv = NAME##_setiv, \ |
| .cipher_free = qcrypto_cipher_ctx_free, \ |
| }; |
| |
| |
| #define DEFINE_ECB_CBC_CTR(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| DEFINE_SETIV(NAME, TYPE, BLEN) \ |
| DEFINE_ECB(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| DEFINE_CBC(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| DEFINE_CTR(NAME, TYPE, BLEN, ENCRYPT) |
| |
| #define DEFINE_ECB_CBC_CTR_XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| DEFINE_ECB_CBC_CTR(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) \ |
| DEFINE_XTS(NAME, TYPE, BLEN, ENCRYPT, DECRYPT) |
| |
| |
| typedef struct QCryptoNettleDES { |
| QCryptoCipher base; |
| struct des_ctx key; |
| uint8_t iv[DES_BLOCK_SIZE]; |
| } QCryptoNettleDES; |
| |
| static void des_encrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| des_encrypt(ctx, length, dst, src); |
| } |
| |
| static void des_decrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| des_decrypt(ctx, length, dst, src); |
| } |
| |
| DEFINE_ECB_CBC_CTR(qcrypto_nettle_des, QCryptoNettleDES, |
| DES_BLOCK_SIZE, des_encrypt_native, des_decrypt_native) |
| |
| |
| typedef struct QCryptoNettleDES3 { |
| QCryptoCipher base; |
| struct des3_ctx key; |
| uint8_t iv[DES3_BLOCK_SIZE]; |
| } QCryptoNettleDES3; |
| |
| static void des3_encrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| des3_encrypt(ctx, length, dst, src); |
| } |
| |
| static void des3_decrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| des3_decrypt(ctx, length, dst, src); |
| } |
| |
| DEFINE_ECB_CBC_CTR(qcrypto_nettle_des3, QCryptoNettleDES3, DES3_BLOCK_SIZE, |
| des3_encrypt_native, des3_decrypt_native) |
| |
| |
| typedef struct QCryptoNettleAES128 { |
| QCryptoCipher base; |
| uint8_t iv[AES_BLOCK_SIZE]; |
| /* First key from pair is encode, second key is decode. */ |
| struct aes128_ctx key[2], key_xts[2]; |
| } QCryptoNettleAES128; |
| |
| static void aes128_encrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| const struct aes128_ctx *keys = ctx; |
| aes128_encrypt(&keys[0], length, dst, src); |
| } |
| |
| static void aes128_decrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| const struct aes128_ctx *keys = ctx; |
| aes128_decrypt(&keys[1], length, dst, src); |
| } |
| |
| DEFINE_ECB_CBC_CTR_XTS(qcrypto_nettle_aes128, |
| QCryptoNettleAES128, AES_BLOCK_SIZE, |
| aes128_encrypt_native, aes128_decrypt_native) |
| |
| |
| typedef struct QCryptoNettleAES192 { |
| QCryptoCipher base; |
| uint8_t iv[AES_BLOCK_SIZE]; |
| /* First key from pair is encode, second key is decode. */ |
| struct aes192_ctx key[2], key_xts[2]; |
| } QCryptoNettleAES192; |
| |
| static void aes192_encrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| const struct aes192_ctx *keys = ctx; |
| aes192_encrypt(&keys[0], length, dst, src); |
| } |
| |
| static void aes192_decrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| const struct aes192_ctx *keys = ctx; |
| aes192_decrypt(&keys[1], length, dst, src); |
| } |
| |
| DEFINE_ECB_CBC_CTR_XTS(qcrypto_nettle_aes192, |
| QCryptoNettleAES192, AES_BLOCK_SIZE, |
| aes192_encrypt_native, aes192_decrypt_native) |
| |
| |
| typedef struct QCryptoNettleAES256 { |
| QCryptoCipher base; |
| uint8_t iv[AES_BLOCK_SIZE]; |
| /* First key from pair is encode, second key is decode. */ |
| struct aes256_ctx key[2], key_xts[2]; |
| } QCryptoNettleAES256; |
| |
| static void aes256_encrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| const struct aes256_ctx *keys = ctx; |
| aes256_encrypt(&keys[0], length, dst, src); |
| } |
| |
| static void aes256_decrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| const struct aes256_ctx *keys = ctx; |
| aes256_decrypt(&keys[1], length, dst, src); |
| } |
| |
| DEFINE_ECB_CBC_CTR_XTS(qcrypto_nettle_aes256, |
| QCryptoNettleAES256, AES_BLOCK_SIZE, |
| aes256_encrypt_native, aes256_decrypt_native) |
| |
| |
| typedef struct QCryptoNettleCAST128 { |
| QCryptoCipher base; |
| uint8_t iv[CAST128_BLOCK_SIZE]; |
| struct cast128_ctx key, key_xts; |
| } QCryptoNettleCAST128; |
| |
| static void cast128_encrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| cast128_encrypt(ctx, length, dst, src); |
| } |
| |
| static void cast128_decrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| cast128_decrypt(ctx, length, dst, src); |
| } |
| |
| DEFINE_ECB_CBC_CTR(qcrypto_nettle_cast128, |
| QCryptoNettleCAST128, CAST128_BLOCK_SIZE, |
| cast128_encrypt_native, cast128_decrypt_native) |
| |
| |
| typedef struct QCryptoNettleSerpent { |
| QCryptoCipher base; |
| uint8_t iv[SERPENT_BLOCK_SIZE]; |
| struct serpent_ctx key, key_xts; |
| } QCryptoNettleSerpent; |
| |
| |
| static void serpent_encrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| serpent_encrypt(ctx, length, dst, src); |
| } |
| |
| static void serpent_decrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| serpent_decrypt(ctx, length, dst, src); |
| } |
| |
| DEFINE_ECB_CBC_CTR_XTS(qcrypto_nettle_serpent, |
| QCryptoNettleSerpent, SERPENT_BLOCK_SIZE, |
| serpent_encrypt_native, serpent_decrypt_native) |
| |
| |
| typedef struct QCryptoNettleTwofish { |
| QCryptoCipher base; |
| uint8_t iv[TWOFISH_BLOCK_SIZE]; |
| struct twofish_ctx key, key_xts; |
| } QCryptoNettleTwofish; |
| |
| static void twofish_encrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| twofish_encrypt(ctx, length, dst, src); |
| } |
| |
| static void twofish_decrypt_native(const void *ctx, size_t length, |
| uint8_t *dst, const uint8_t *src) |
| { |
| twofish_decrypt(ctx, length, dst, src); |
| } |
| |
| DEFINE_ECB_CBC_CTR_XTS(qcrypto_nettle_twofish, |
| QCryptoNettleTwofish, TWOFISH_BLOCK_SIZE, |
| twofish_encrypt_native, twofish_decrypt_native) |
| |
| |
| bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg, |
| QCryptoCipherMode mode) |
| { |
| switch (alg) { |
| case QCRYPTO_CIPHER_ALG_DES: |
| case QCRYPTO_CIPHER_ALG_3DES: |
| case QCRYPTO_CIPHER_ALG_AES_128: |
| case QCRYPTO_CIPHER_ALG_AES_192: |
| case QCRYPTO_CIPHER_ALG_AES_256: |
| case QCRYPTO_CIPHER_ALG_CAST5_128: |
| case QCRYPTO_CIPHER_ALG_SERPENT_128: |
| case QCRYPTO_CIPHER_ALG_SERPENT_192: |
| case QCRYPTO_CIPHER_ALG_SERPENT_256: |
| case QCRYPTO_CIPHER_ALG_TWOFISH_128: |
| case QCRYPTO_CIPHER_ALG_TWOFISH_192: |
| case QCRYPTO_CIPHER_ALG_TWOFISH_256: |
| break; |
| default: |
| return false; |
| } |
| |
| switch (mode) { |
| case QCRYPTO_CIPHER_MODE_ECB: |
| case QCRYPTO_CIPHER_MODE_CBC: |
| case QCRYPTO_CIPHER_MODE_XTS: |
| case QCRYPTO_CIPHER_MODE_CTR: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static QCryptoCipher *qcrypto_cipher_ctx_new(QCryptoCipherAlgorithm alg, |
| QCryptoCipherMode mode, |
| const uint8_t *key, |
| size_t nkey, |
| Error **errp) |
| { |
| switch (mode) { |
| case QCRYPTO_CIPHER_MODE_ECB: |
| case QCRYPTO_CIPHER_MODE_CBC: |
| case QCRYPTO_CIPHER_MODE_XTS: |
| case QCRYPTO_CIPHER_MODE_CTR: |
| break; |
| default: |
| goto bad_cipher_mode; |
| } |
| |
| if (!qcrypto_cipher_validate_key_length(alg, mode, nkey, errp)) { |
| return NULL; |
| } |
| |
| switch (alg) { |
| case QCRYPTO_CIPHER_ALG_DES: |
| { |
| QCryptoNettleDES *ctx; |
| const QCryptoCipherDriver *drv; |
| |
| switch (mode) { |
| case QCRYPTO_CIPHER_MODE_ECB: |
| drv = &qcrypto_nettle_des_driver_ecb; |
| break; |
| case QCRYPTO_CIPHER_MODE_CBC: |
| drv = &qcrypto_nettle_des_driver_cbc; |
| break; |
| case QCRYPTO_CIPHER_MODE_CTR: |
| drv = &qcrypto_nettle_des_driver_ctr; |
| break; |
| default: |
| goto bad_cipher_mode; |
| } |
| |
| ctx = g_new0(QCryptoNettleDES, 1); |
| ctx->base.driver = drv; |
| des_set_key(&ctx->key, key); |
| |
| return &ctx->base; |
| } |
| |
| case QCRYPTO_CIPHER_ALG_3DES: |
| { |
| QCryptoNettleDES3 *ctx; |
| const QCryptoCipherDriver *drv; |
| |
| switch (mode) { |
| case QCRYPTO_CIPHER_MODE_ECB: |
| drv = &qcrypto_nettle_des3_driver_ecb; |
| break; |
| case QCRYPTO_CIPHER_MODE_CBC: |
| drv = &qcrypto_nettle_des3_driver_cbc; |
| break; |
| case QCRYPTO_CIPHER_MODE_CTR: |
| drv = &qcrypto_nettle_des3_driver_ctr; |
| break; |
| default: |
| goto bad_cipher_mode; |
| } |
| |
| ctx = g_new0(QCryptoNettleDES3, 1); |
| ctx->base.driver = drv; |
| des3_set_key(&ctx->key, key); |
| return &ctx->base; |
| } |
| |
| case QCRYPTO_CIPHER_ALG_AES_128: |
| { |
| QCryptoNettleAES128 *ctx = g_new0(QCryptoNettleAES128, 1); |
| |
| switch (mode) { |
| case QCRYPTO_CIPHER_MODE_ECB: |
| ctx->base.driver = &qcrypto_nettle_aes128_driver_ecb; |
| break; |
| case QCRYPTO_CIPHER_MODE_CBC: |
| ctx->base.driver = &qcrypto_nettle_aes128_driver_cbc; |
| break; |
| case QCRYPTO_CIPHER_MODE_CTR: |
| ctx->base.driver = &qcrypto_nettle_aes128_driver_ctr; |
| break; |
| case QCRYPTO_CIPHER_MODE_XTS: |
| ctx->base.driver = &qcrypto_nettle_aes128_driver_xts; |
| nkey /= 2; |
| aes128_set_encrypt_key(&ctx->key_xts[0], key + nkey); |
| aes128_set_decrypt_key(&ctx->key_xts[1], key + nkey); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| aes128_set_encrypt_key(&ctx->key[0], key); |
| 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; |
| } |
