2 * Copyright (c) 2005-2010 Pawel Jakub Dawidek <pjd@FreeBSD.org>
3 * Copyright (c) 2015 Allan Jude <allanjude@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include "geliboot_internal.h"
38 geliboot_crypt(u_int algo, geli_op_t enc, u_char *data, size_t datasize,
39 const u_char *key, size_t keysize, u_char *iv)
42 cipherInstance cipher;
43 struct aes_xts_ctx xtsctx, *ctxp;
49 err = rijndael_makeKey(&aeskey, !enc, keysize,
52 printf("Failed to setup crypo keys: %d\n", err);
56 err = rijndael_cipherInit(&cipher, MODE_CBC, iv);
58 printf("Failed to setup IV: %d\n", err);
64 blks = rijndael_blockDecrypt(&cipher, &aeskey, data,
68 blks = rijndael_blockEncrypt(&cipher, &aeskey, data,
72 if (datasize != (blks / 8)) {
73 printf("Failed to %s the entire input: %u != %zu\n",
74 enc ? "decrypt" : "encrypt",
80 xts_len = keysize << 1;
83 enc_xform_aes_xts.setkey(ctxp, key, xts_len / 8);
84 enc_xform_aes_xts.reinit(ctxp, iv, AES_XTS_IV_LEN);
88 enc_xform_aes_xts.decrypt_multi(ctxp, data, data,
92 enc_xform_aes_xts.encrypt_multi(ctxp, data, data,
98 printf("Unsupported crypto algorithm #%d\n", algo);
106 g_eli_crypto_cipher(u_int algo, geli_op_t enc, u_char *data, size_t datasize,
107 const u_char *key, size_t keysize)
109 u_char iv[G_ELI_IVKEYLEN];
111 explicit_bzero(iv, sizeof(iv));
112 return (geliboot_crypt(algo, enc, data, datasize, key, keysize, iv));
116 g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize,
117 const u_char *key, size_t keysize)
120 /* We prefer AES-CBC for metadata protection. */
121 if (algo == CRYPTO_AES_XTS)
122 algo = CRYPTO_AES_CBC;
124 return (g_eli_crypto_cipher(algo, GELI_ENCRYPT, data, datasize, key,
129 g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize,
130 const u_char *key, size_t keysize)
133 /* We prefer AES-CBC for metadata protection. */
134 if (algo == CRYPTO_AES_XTS)
135 algo = CRYPTO_AES_CBC;
137 return (g_eli_crypto_cipher(algo, GELI_DECRYPT, data, datasize, key,