2 * Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/malloc.h>
42 #include <openssl/evp.h>
45 #include <geom/eli/g_eli.h>
48 MALLOC_DECLARE(M_ELI);
51 g_eli_crypto_done(struct cryptop *crp)
54 crp->crp_opaque = (void *)crp;
60 g_eli_crypto_cipher(u_int algo, int enc, u_char *data, size_t datasize,
61 const u_char *key, size_t keysize)
65 struct cryptodesc *crd;
72 bzero(&cri, sizeof(cri));
74 cri.cri_key = __DECONST(void *, key);
75 cri.cri_klen = keysize;
76 error = crypto_newsession(&sid, &cri, CRYPTOCAP_F_SOFTWARE);
79 p = malloc(sizeof(*crp) + sizeof(*crd) + sizeof(*uio) + sizeof(*iov),
80 M_ELI, M_NOWAIT | M_ZERO);
82 crypto_freesession(sid);
85 crp = (struct cryptop *)p; p += sizeof(*crp);
86 crd = (struct cryptodesc *)p; p += sizeof(*crd);
87 uio = (struct uio *)p; p += sizeof(*uio);
88 iov = (struct iovec *)p; p += sizeof(*iov);
90 iov->iov_len = datasize;
95 uio->uio_segflg = UIO_SYSSPACE;
96 uio->uio_resid = datasize;
99 crd->crd_len = datasize;
100 crd->crd_flags = CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
102 crd->crd_flags |= CRD_F_ENCRYPT;
104 crd->crd_key = __DECONST(void *, key);
105 crd->crd_klen = keysize;
106 bzero(crd->crd_iv, sizeof(crd->crd_iv));
107 crd->crd_next = NULL;
110 crp->crp_ilen = datasize;
111 crp->crp_olen = datasize;
112 crp->crp_opaque = NULL;
113 crp->crp_callback = g_eli_crypto_done;
114 crp->crp_buf = (void *)uio;
115 crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIFSYNC | CRYPTO_F_REL;
118 error = crypto_dispatch(crp);
120 while (crp->crp_opaque == NULL)
121 tsleep(crp, PRIBIO, "geli", hz / 5);
122 error = crp->crp_etype;
126 crypto_freesession(sid);
131 g_eli_crypto_cipher(u_int algo, int enc, u_char *data, size_t datasize,
132 const u_char *key, size_t keysize)
135 const EVP_CIPHER *type;
140 case CRYPTO_NULL_CBC:
141 type = EVP_enc_null();
146 type = EVP_aes_128_cbc();
149 type = EVP_aes_192_cbc();
152 type = EVP_aes_256_cbc();
161 case CRYPTO_CAMELLIA_CBC:
164 type = EVP_camellia_128_cbc();
167 type = EVP_camellia_192_cbc();
170 type = EVP_camellia_256_cbc();
176 case CRYPTO_3DES_CBC:
177 type = EVP_des_ede3_cbc();
183 EVP_CIPHER_CTX_init(&ctx);
185 EVP_CipherInit_ex(&ctx, type, NULL, NULL, NULL, enc);
186 EVP_CIPHER_CTX_set_key_length(&ctx, keysize / 8);
187 EVP_CIPHER_CTX_set_padding(&ctx, 0);
188 bzero(iv, sizeof(iv));
189 EVP_CipherInit_ex(&ctx, NULL, NULL, key, iv, enc);
191 if (EVP_CipherUpdate(&ctx, data, &outsize, data, datasize) == 0) {
192 EVP_CIPHER_CTX_cleanup(&ctx);
195 assert(outsize == (int)datasize);
197 if (EVP_CipherFinal_ex(&ctx, data + outsize, &outsize) == 0) {
198 EVP_CIPHER_CTX_cleanup(&ctx);
201 assert(outsize == 0);
203 EVP_CIPHER_CTX_cleanup(&ctx);
206 #endif /* !_KERNEL */
209 g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize,
210 const u_char *key, size_t keysize)
213 return (g_eli_crypto_cipher(algo, 1, data, datasize, key, keysize));
217 g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize,
218 const u_char *key, size_t keysize)
221 return (g_eli_crypto_cipher(algo, 0, data, datasize, key, keysize));
225 g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey,
228 u_char k_ipad[128], key[128];
232 bzero(key, sizeof(key));
235 else if (hkeylen <= 128)
236 bcopy(hkey, key, hkeylen);
238 /* If key is longer than 128 bytes reset it to key = SHA512(key). */
240 SHA512_Update(&lctx, hkey, hkeylen);
241 SHA512_Final(key, &lctx);
244 /* XOR key with ipad and opad values. */
245 for (i = 0; i < sizeof(key); i++) {
246 k_ipad[i] = key[i] ^ 0x36;
247 ctx->k_opad[i] = key[i] ^ 0x5c;
249 bzero(key, sizeof(key));
250 /* Perform inner SHA512. */
251 SHA512_Init(&ctx->shactx);
252 SHA512_Update(&ctx->shactx, k_ipad, sizeof(k_ipad));
256 g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data,
260 SHA512_Update(&ctx->shactx, data, datasize);
264 g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize)
266 u_char digest[SHA512_MDLEN];
269 SHA512_Final(digest, &ctx->shactx);
270 /* Perform outer SHA512. */
272 SHA512_Update(&lctx, ctx->k_opad, sizeof(ctx->k_opad));
273 bzero(ctx, sizeof(*ctx));
274 SHA512_Update(&lctx, digest, sizeof(digest));
275 SHA512_Final(digest, &lctx);
276 /* mdsize == 0 means "Give me the whole hash!" */
278 mdsize = SHA512_MDLEN;
279 bcopy(digest, md, mdsize);
283 g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, const uint8_t *data,
284 size_t datasize, uint8_t *md, size_t mdsize)
288 g_eli_crypto_hmac_init(&ctx, hkey, hkeysize);
289 g_eli_crypto_hmac_update(&ctx, data, datasize);
290 g_eli_crypto_hmac_final(&ctx, md, mdsize);