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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #include <pthread.h>
     30 #include <stdlib.h>
     31 #include <string.h>
     32 #include <strings.h>
     33 #include <sys/types.h>
     34 #include <security/cryptoki.h>
     35 #include <security/pkcs11.h>
     36 #include <arcfour.h>
     37 #include "softSession.h"
     38 #include "softObject.h"
     39 #include "softCrypt.h"
     40 
     41 
     42 /*
     43  * Allocate the ARCFour key stream for the active encryption or decryption
     44  * operation.
     45  */
     46 CK_RV
     47 soft_arcfour_crypt_init(soft_session_t *session_p, CK_MECHANISM_PTR pMechanism,
     48     soft_object_t *key_p, boolean_t encrypt)
     49 {
     50 
     51 	uint8_t *keyval;
     52 	int keyvallen;
     53 	ARCFour_key *keystream;
     54 	crypto_active_op_t *active_op;
     55 
     56 #ifdef	__sparcv9
     57 	/* LINTED */
     58 	keyvallen = (int)OBJ_SEC_VALUE_LEN(key_p);
     59 #else	/* !__sparcv9 */
     60 	keyvallen = OBJ_SEC_VALUE_LEN(key_p);
     61 #endif	/* __sparcv9 */
     62 
     63 	if ((keyvallen < ARCFOUR_MIN_KEY_BYTES) ||
     64 	    (keyvallen > ARCFOUR_MAX_KEY_BYTES))
     65 		return (CKR_KEY_SIZE_RANGE);
     66 
     67 	keyval = OBJ_SEC_VALUE(key_p);
     68 
     69 	if (keyval == NULL)
     70 		return (CKR_KEY_TYPE_INCONSISTENT);
     71 
     72 	keystream = malloc(sizeof (ARCFour_key));
     73 	if (keystream == NULL) {
     74 		return (CKR_HOST_MEMORY);
     75 	}
     76 	arcfour_key_init(keystream, keyval, keyvallen);
     77 
     78 	(void) pthread_mutex_lock(&session_p->session_mutex);
     79 	active_op = (encrypt) ? &(session_p->encrypt) : &(session_p->decrypt);
     80 	active_op->context = keystream;
     81 	active_op->mech.mechanism = pMechanism->mechanism;
     82 	(void) pthread_mutex_unlock(&session_p->session_mutex);
     83 
     84 	return (CKR_OK);
     85 }
     86 
     87 
     88 /*
     89  * soft_arcfour_crypt()
     90  *
     91  * Arguments:
     92  *      active_op:	pointer to the actiove operation in the session
     93  *	input:		pointer to the input data to be transformed
     94  *	inputlen:	length of the input.
     95  *	output:		pointer to the output storage.
     96  *	outputlenp:	pointer to the length of the output
     97  *
     98  * Description:
     99  *      Encrypts/Decrypts the 'input' and gets the result in the 'output'
    100  *
    101  * Returns:
    102  *      CKR_OK: success
    103  *      CKR_BUFFER_TOO_SMALL: the output buffer provided by application
    104  *			      is too small
    105  */
    106 CK_RV
    107 soft_arcfour_crypt(crypto_active_op_t *active_op, CK_BYTE_PTR input,
    108     CK_ULONG inputlen, CK_BYTE_PTR output, CK_ULONG_PTR outputlenp)
    109 {
    110 	ARCFour_key *keystream = active_op->context;
    111 
    112 	/*
    113 	 * If application asks for the length of the output buffer
    114 	 * to hold the transformed text
    115 	 */
    116 	if (output == NULL) {
    117 		*outputlenp = inputlen;
    118 		return (CKR_OK);
    119 	}
    120 
    121 	/* Is the application-supplied buffer large enough? */
    122 	if (*outputlenp < inputlen) {
    123 		*outputlenp = inputlen;
    124 		return (CKR_BUFFER_TOO_SMALL);
    125 	}
    126 	arcfour_crypt(keystream, input, output, inputlen);
    127 	*outputlenp = inputlen;
    128 
    129 	return (CKR_OK);
    130 }
    131