/*
 * 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.
 */

#ifndef _DES_IMPL_H
#define _DES_IMPL_H

/*
 * Common definitions used by DES
 */

#ifdef  __cplusplus
extern "C" {
#endif

#define DES_BLOCK_LEN   8

#define DES_COPY_BLOCK(src, dst) \
        (dst)[0] = (src)[0]; \
        (dst)[1] = (src)[1]; \
        (dst)[2] = (src)[2]; \
        (dst)[3] = (src)[3]; \
        (dst)[4] = (src)[4]; \
        (dst)[5] = (src)[5]; \
        (dst)[6] = (src)[6]; \
        (dst)[7] = (src)[7];

#define DES_XOR_BLOCK(src, dst) \
        (dst)[0] ^= (src)[0]; \
        (dst)[1] ^= (src)[1]; \
        (dst)[2] ^= (src)[2]; \
        (dst)[3] ^= (src)[3]; \
        (dst)[4] ^= (src)[4]; \
        (dst)[5] ^= (src)[5]; \
        (dst)[6] ^= (src)[6]; \
        (dst)[7] ^= (src)[7]

typedef enum des_strength {
        DES = 1,
        DES2,
        DES3
} des_strength_t;

#define DES3_STRENGTH   0x08000000

#define DES_KEYSIZE     8
#define DES_MINBITS     64
#define DES_MAXBITS     64
#define DES_MINBYTES    (DES_MINBITS / 8)
#define DES_MAXBYTES    (DES_MAXBITS / 8)
#define DES_IV_LEN      8

#define DES2_KEYSIZE    (2 * DES_KEYSIZE)
#define DES2_MINBITS    (2 * DES_MINBITS)
#define DES2_MAXBITS    (2 * DES_MAXBITS)
#define DES2_MINBYTES   (DES2_MINBITS / 8)
#define DES2_MAXBYTES   (DES2_MAXBITS / 8)

#define DES3_KEYSIZE    (3 * DES_KEYSIZE)
#define DES3_MINBITS    (2 * DES_MINBITS)       /* DES3 handles CKK_DES2 keys */
#define DES3_MAXBITS    (3 * DES_MAXBITS)
#define DES3_MINBYTES   (DES3_MINBITS / 8)
#define DES3_MAXBYTES   (DES3_MAXBITS / 8)

extern int des_encrypt_contiguous_blocks(void *, char *, size_t,
    crypto_data_t *);
extern int des_decrypt_contiguous_blocks(void *, char *, size_t,
    crypto_data_t *);
extern uint64_t des_crypt_impl(uint64_t *, uint64_t, int);
extern void des_ks(uint64_t *, uint64_t);
extern int des_crunch_block(const void *, const uint8_t *, uint8_t *,
    boolean_t);
extern int des3_crunch_block(const void *, const uint8_t *, uint8_t *,
    boolean_t);
extern void des_init_keysched(uint8_t *, des_strength_t, void *);
extern void *des_alloc_keysched(size_t *, des_strength_t, int);
extern boolean_t des_keycheck(uint8_t *, des_strength_t, uint8_t *);
extern void des_parity_fix(uint8_t *, des_strength_t, uint8_t *);
extern void des_copy_block(uint8_t *, uint8_t *);
extern void des_xor_block(uint8_t *, uint8_t *);
extern int des_encrypt_block(const void *, const uint8_t *, uint8_t *);
extern int des3_encrypt_block(const void *, const uint8_t *, uint8_t *);
extern int des_decrypt_block(const void *, const uint8_t *, uint8_t *);
extern int des3_decrypt_block(const void *, const uint8_t *, uint8_t *);

#ifdef _DES_IMPL

#ifdef _KERNEL
typedef enum des_mech_type {
        DES_ECB_MECH_INFO_TYPE,         /* SUN_CKM_DES_ECB */
        DES_CBC_MECH_INFO_TYPE,         /* SUN_CKM_DES_CBC */
        DES_CFB_MECH_INFO_TYPE,         /* SUN_CKM_DES_CFB */
        DES3_ECB_MECH_INFO_TYPE,        /* SUN_CKM_DES3_ECB */
        DES3_CBC_MECH_INFO_TYPE,        /* SUN_CKM_DES3_CBC */
        DES3_CFB_MECH_INFO_TYPE         /* SUN_CKM_DES3_CFB */
} des_mech_type_t;

#endif  /* _KERNEL */
#endif  /* _DES_IMPL */

#ifdef  __cplusplus
}
#endif

#endif  /* _DES_IMPL_H */