277 lines
6.8 KiB
C
277 lines
6.8 KiB
C
/*-
|
|
* Copyright (c) 2005 Pawel Jakub Dawidek <pjd@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#ifdef _KERNEL
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/uio.h>
|
|
#else
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <strings.h>
|
|
#include <errno.h>
|
|
#include <assert.h>
|
|
#include <openssl/evp.h>
|
|
#define _OpenSSL_
|
|
#endif
|
|
#include <geom/eli/g_eli.h>
|
|
|
|
#ifdef _KERNEL
|
|
MALLOC_DECLARE(M_ELI);
|
|
|
|
static int
|
|
g_eli_crypto_done(struct cryptop *crp)
|
|
{
|
|
|
|
crp->crp_opaque = (void *)crp;
|
|
wakeup(crp);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
g_eli_crypto_cipher(u_int algo, int enc, u_char *data, size_t datasize,
|
|
const u_char *key, size_t keysize)
|
|
{
|
|
struct cryptoini cri;
|
|
struct cryptop *crp;
|
|
struct cryptodesc *crd;
|
|
struct uio *uio;
|
|
struct iovec *iov;
|
|
uint64_t sid;
|
|
u_char *p;
|
|
int error;
|
|
|
|
bzero(&cri, sizeof(cri));
|
|
cri.cri_alg = algo;
|
|
cri.cri_key = __DECONST(void *, key);
|
|
cri.cri_klen = keysize;
|
|
error = crypto_newsession(&sid, &cri, 0);
|
|
if (error != 0)
|
|
return (error);
|
|
p = malloc(sizeof(*crp) + sizeof(*crd) + sizeof(*uio) + sizeof(*iov),
|
|
M_ELI, M_NOWAIT | M_ZERO);
|
|
if (p == NULL) {
|
|
crypto_freesession(sid);
|
|
return (ENOMEM);
|
|
}
|
|
crp = (struct cryptop *)p; p += sizeof(*crp);
|
|
crd = (struct cryptodesc *)p; p += sizeof(*crd);
|
|
uio = (struct uio *)p; p += sizeof(*uio);
|
|
iov = (struct iovec *)p; p += sizeof(*iov);
|
|
|
|
iov->iov_len = datasize;
|
|
iov->iov_base = data;
|
|
|
|
uio->uio_iov = iov;
|
|
uio->uio_iovcnt = 1;
|
|
uio->uio_segflg = UIO_SYSSPACE;
|
|
uio->uio_resid = datasize;
|
|
|
|
crd->crd_skip = 0;
|
|
crd->crd_len = datasize;
|
|
crd->crd_flags = CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
|
|
if (enc)
|
|
crd->crd_flags |= CRD_F_ENCRYPT;
|
|
crd->crd_alg = algo;
|
|
crd->crd_key = __DECONST(void *, key);
|
|
crd->crd_klen = keysize;
|
|
bzero(crd->crd_iv, sizeof(crd->crd_iv));
|
|
crd->crd_next = NULL;
|
|
|
|
crp->crp_sid = sid;
|
|
crp->crp_ilen = datasize;
|
|
crp->crp_olen = datasize;
|
|
crp->crp_opaque = NULL;
|
|
crp->crp_callback = g_eli_crypto_done;
|
|
crp->crp_buf = (void *)uio;
|
|
crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIFSYNC | CRYPTO_F_REL;
|
|
crp->crp_desc = crd;
|
|
|
|
error = crypto_dispatch(crp);
|
|
if (error == 0) {
|
|
while (crp->crp_opaque == NULL)
|
|
tsleep(crp, PRIBIO, "geli", hz / 5);
|
|
error = crp->crp_etype;
|
|
}
|
|
|
|
free(crp, M_ELI);
|
|
crypto_freesession(sid);
|
|
return (error);
|
|
}
|
|
#else /* !_KERNEL */
|
|
static int
|
|
g_eli_crypto_cipher(u_int algo, int enc, u_char *data, size_t datasize,
|
|
const u_char *key, size_t keysize)
|
|
{
|
|
EVP_CIPHER_CTX ctx;
|
|
const EVP_CIPHER *type;
|
|
u_char iv[keysize];
|
|
int outsize;
|
|
|
|
switch (algo) {
|
|
case CRYPTO_NULL_CBC:
|
|
type = EVP_enc_null();
|
|
break;
|
|
case CRYPTO_AES_CBC:
|
|
switch (keysize) {
|
|
case 128:
|
|
type = EVP_aes_128_cbc();
|
|
break;
|
|
case 192:
|
|
type = EVP_aes_192_cbc();
|
|
break;
|
|
case 256:
|
|
type = EVP_aes_256_cbc();
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
break;
|
|
case CRYPTO_BLF_CBC:
|
|
type = EVP_bf_cbc();
|
|
break;
|
|
case CRYPTO_3DES_CBC:
|
|
type = EVP_des_ede3_cbc();
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
EVP_CIPHER_CTX_init(&ctx);
|
|
|
|
EVP_CipherInit_ex(&ctx, type, NULL, NULL, NULL, enc);
|
|
EVP_CIPHER_CTX_set_key_length(&ctx, keysize / 8);
|
|
EVP_CIPHER_CTX_set_padding(&ctx, 0);
|
|
bzero(iv, sizeof(iv));
|
|
EVP_CipherInit_ex(&ctx, NULL, NULL, key, iv, enc);
|
|
|
|
if (EVP_CipherUpdate(&ctx, data, &outsize, data, datasize) == 0) {
|
|
EVP_CIPHER_CTX_cleanup(&ctx);
|
|
return (EINVAL);
|
|
}
|
|
assert(outsize == (int)datasize);
|
|
|
|
if (EVP_CipherFinal_ex(&ctx, data + outsize, &outsize) == 0) {
|
|
EVP_CIPHER_CTX_cleanup(&ctx);
|
|
return (EINVAL);
|
|
}
|
|
assert(outsize == 0);
|
|
|
|
EVP_CIPHER_CTX_cleanup(&ctx);
|
|
return (0);
|
|
}
|
|
#endif /* !_KERNEL */
|
|
|
|
int
|
|
g_eli_crypto_encrypt(u_int algo, u_char *data, size_t datasize,
|
|
const u_char *key, size_t keysize)
|
|
{
|
|
|
|
return (g_eli_crypto_cipher(algo, 1, data, datasize, key, keysize));
|
|
}
|
|
|
|
int
|
|
g_eli_crypto_decrypt(u_int algo, u_char *data, size_t datasize,
|
|
const u_char *key, size_t keysize)
|
|
{
|
|
|
|
return (g_eli_crypto_cipher(algo, 0, data, datasize, key, keysize));
|
|
}
|
|
|
|
void
|
|
g_eli_crypto_hmac_init(struct hmac_ctx *ctx, const uint8_t *hkey,
|
|
size_t hkeylen)
|
|
{
|
|
u_char k_ipad[128], key[128];
|
|
SHA512_CTX lctx;
|
|
u_int i;
|
|
|
|
bzero(key, sizeof(key));
|
|
if (hkeylen == 0)
|
|
; /* do nothing */
|
|
else if (hkeylen <= 128)
|
|
bcopy(hkey, key, hkeylen);
|
|
else {
|
|
/* If key is longer than 128 bytes reset it to key = SHA512(key). */
|
|
SHA512_Init(&lctx);
|
|
SHA512_Update(&lctx, hkey, hkeylen);
|
|
SHA512_Final(key, &lctx);
|
|
}
|
|
|
|
/* XOR key with ipad and opad values. */
|
|
for (i = 0; i < sizeof(key); i++) {
|
|
k_ipad[i] = key[i] ^ 0x36;
|
|
ctx->k_opad[i] = key[i] ^ 0x5c;
|
|
}
|
|
bzero(key, sizeof(key));
|
|
/* Perform inner SHA512. */
|
|
SHA512_Init(&ctx->shactx);
|
|
SHA512_Update(&ctx->shactx, k_ipad, sizeof(k_ipad));
|
|
}
|
|
|
|
void
|
|
g_eli_crypto_hmac_update(struct hmac_ctx *ctx, const uint8_t *data,
|
|
size_t datasize)
|
|
{
|
|
|
|
SHA512_Update(&ctx->shactx, data, datasize);
|
|
}
|
|
|
|
void
|
|
g_eli_crypto_hmac_final(struct hmac_ctx *ctx, uint8_t *md, size_t mdsize)
|
|
{
|
|
u_char digest[SHA512_MDLEN];
|
|
SHA512_CTX lctx;
|
|
|
|
SHA512_Final(digest, &ctx->shactx);
|
|
/* Perform outer SHA512. */
|
|
SHA512_Init(&lctx);
|
|
SHA512_Update(&lctx, ctx->k_opad, sizeof(ctx->k_opad));
|
|
bzero(ctx, sizeof(*ctx));
|
|
SHA512_Update(&lctx, digest, sizeof(digest));
|
|
SHA512_Final(digest, &lctx);
|
|
/* mdsize == 0 means "Give me the whole hash!" */
|
|
if (mdsize == 0)
|
|
mdsize = SHA512_MDLEN;
|
|
bcopy(digest, md, mdsize);
|
|
}
|
|
|
|
void
|
|
g_eli_crypto_hmac(const uint8_t *hkey, size_t hkeysize, const uint8_t *data,
|
|
size_t datasize, uint8_t *md, size_t mdsize)
|
|
{
|
|
struct hmac_ctx ctx;
|
|
|
|
g_eli_crypto_hmac_init(&ctx, hkey, hkeysize);
|
|
g_eli_crypto_hmac_update(&ctx, data, datasize);
|
|
g_eli_crypto_hmac_final(&ctx, md, mdsize);
|
|
}
|