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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
* Copyright 2013 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Crypto support, using libpkcs11
*
* Some code copied from the server: libsmb smb_crypt.c
* with minor changes, i.e. errno.h return values.
* XXX: Later, make the server use these.
*/
#include <sys/types.h>
#include <sys/md4.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <security/cryptoki.h>
#include <security/pkcs11.h>
#include <cryptoutil.h>
#include "smb_crypt.h"
static void
smb_initlmkey(uchar_t *keyout, const uchar_t *keyin);
/*
* Like libsmb smb_auth_DES,
* but use uchar_t, return errno.
*/
int
smb_encrypt_DES(uchar_t *Result, int ResultLen,
const uchar_t *Key, int KeyLen,
const uchar_t *Data, int DataLen)
{
CK_RV rv;
CK_MECHANISM mechanism;
CK_OBJECT_HANDLE hKey;
CK_SESSION_HANDLE hSession;
CK_ULONG ciphertext_len;
uchar_t des_key[8];
int error = 0;
int K, D;
int k, d;
/*
* Calculate proper number of iterations.
* Known call cases include:
* ResultLen=16, KeyLen=14, DataLen=8
* ResultLen=24, KeyLen=21, DataLen=8
* ResultLen=16, KeyLen=14, DataLen=16
*/
K = KeyLen / 7;
D = DataLen / 8;
if ((KeyLen % 7) || (DataLen % 8))
return (EINVAL);
if (K == 0 || D == 0)
return (EINVAL);
if (ResultLen < (K * 8))
return (EINVAL);
/*
* Use SUNW convenience function to initialize the cryptoki
* library, and open a session with a slot that supports
* the mechanism we plan on using.
*/
mechanism.mechanism = CKM_DES_ECB;
mechanism.pParameter = NULL;
mechanism.ulParameterLen = 0;
rv = SUNW_C_GetMechSession(mechanism.mechanism, &hSession);
if (rv != CKR_OK) {
return (ENOTSUP);
}
for (d = k = 0; k < K; k++, d++) {
/* Cycle the input again, as necessary. */
if (d == D)
d = 0;
smb_initlmkey(des_key, &Key[k * 7]);
rv = SUNW_C_KeyToObject(hSession, mechanism.mechanism,
des_key, 8, &hKey);
if (rv != CKR_OK) {
error = EIO;
goto exit_session;
}
/* Initialize the encryption operation in the session */
rv = C_EncryptInit(hSession, &mechanism, hKey);
if (rv != CKR_OK) {
error = EIO;
goto exit_encrypt;
}
ciphertext_len = 8;
/* Read in the data and encrypt this portion */
rv = C_EncryptUpdate(hSession,
(CK_BYTE_PTR)Data + (d * 8), 8,
(CK_BYTE_PTR)Result + (k * 8),
&ciphertext_len);
if (rv != CKR_OK) {
error = EIO;
goto exit_encrypt;
}
(void) C_DestroyObject(hSession, hKey);
}
goto exit_session;
exit_encrypt:
(void) C_DestroyObject(hSession, hKey);
exit_session:
(void) C_CloseSession(hSession);
return (error);
}
/*
* See "Netlogon Credential Computation" section of MS-NRPC document.
* Same as in libsmb, but output arg first.
*/
static void
smb_initlmkey(uchar_t *keyout, const uchar_t *keyin)
{
int i;
keyout[0] = keyin[0] >> 0x01;
keyout[1] = ((keyin[0] & 0x01) << 6) | (keyin[1] >> 2);
keyout[2] = ((keyin[1] & 0x03) << 5) | (keyin[2] >> 3);
keyout[3] = ((keyin[2] & 0x07) << 4) | (keyin[3] >> 4);
keyout[4] = ((keyin[3] & 0x0f) << 3) | (keyin[4] >> 5);
keyout[5] = ((keyin[4] & 0x1f) << 2) | (keyin[5] >> 6);
keyout[6] = ((keyin[5] & 0x3f) << 1) | (keyin[6] >> 7);
keyout[7] = keyin[6] & 0x7f;
for (i = 0; i < 8; i++)
keyout[i] = (keyout[i] << 1) & 0xfe;
}
/*
* CKM_RC4
*/
int
smb_encrypt_RC4(uchar_t *Result, int ResultLen,
const uchar_t *Key, int KeyLen,
const uchar_t *Data, int DataLen)
{
CK_RV rv;
CK_MECHANISM mechanism;
CK_OBJECT_HANDLE hKey;
CK_SESSION_HANDLE hSession;
CK_ULONG ciphertext_len;
int error = EIO;
/*
* Use SUNW convenience function to initialize the cryptoki
* library, and open a session with a slot that supports
* the mechanism we plan on using.
*/
mechanism.mechanism = CKM_RC4;
mechanism.pParameter = NULL;
mechanism.ulParameterLen = 0;
rv = SUNW_C_GetMechSession(mechanism.mechanism, &hSession);
if (rv != CKR_OK) {
return (ENOTSUP);
}
rv = SUNW_C_KeyToObject(hSession, mechanism.mechanism,
Key, KeyLen, &hKey);
if (rv != CKR_OK)
goto exit_session;
/* Initialize the encryption operation in the session */
rv = C_EncryptInit(hSession, &mechanism, hKey);
if (rv != CKR_OK)
goto exit_encrypt;
ciphertext_len = ResultLen;
rv = C_EncryptUpdate(hSession,
(CK_BYTE_PTR)Data, DataLen,
(CK_BYTE_PTR)Result, &ciphertext_len);
if (rv == CKR_OK)
error = 0;
exit_encrypt:
(void) C_DestroyObject(hSession, hKey);
exit_session:
(void) C_CloseSession(hSession);
return (error);
}
/*
* Get some random bytes from /dev/urandom
*
* There may be a preferred way to call this via libpkcs11
* XXX: (see: C_GenerateRandom, etc. -- later...)
* Just read from /dev/urandom for now.
*/
int
smb_get_urandom(void *data, size_t dlen)
{
int fd, rlen;
fd = open("/dev/urandom", O_RDONLY);
if (fd < 0)
return (errno);
rlen = read(fd, data, dlen);
close(fd);
if (rlen < 0)
return (errno);
if (rlen < dlen)
return (EIO);
return (0);
}
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