1/*
2 *  linux/drivers/s390/crypto/zcrypt_cex2a.h
3 *
4 *  zcrypt 2.1.0
5 *
6 *  Copyright (C)  2001, 2006 IBM Corporation
7 *  Author(s): Robert Burroughs
8 *	       Eric Rossman (edrossma@us.ibm.com)
9 *
10 *  Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com)
11 *  Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2, or (at your option)
16 * any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28#ifndef _ZCRYPT_CEX2A_H_
29#define _ZCRYPT_CEX2A_H_
30
31/**
32 * The type 50 message family is associated with a CEX2A card.
33 *
34 * The four members of the family are described below.
35 *
36 * Note that all unsigned char arrays are right-justified and left-padded
37 * with zeroes.
38 *
39 * Note that all reserved fields must be zeroes.
40 */
41struct type50_hdr {
42	unsigned char	reserved1;
43	unsigned char	msg_type_code;	/* 0x50 */
44	unsigned short	msg_len;
45	unsigned char	reserved2;
46	unsigned char	ignored;
47	unsigned short	reserved3;
48} __attribute__((packed));
49
50#define TYPE50_TYPE_CODE	0x50
51
52#define TYPE50_MEB1_FMT		0x0001
53#define TYPE50_MEB2_FMT		0x0002
54#define TYPE50_CRB1_FMT		0x0011
55#define TYPE50_CRB2_FMT		0x0012
56
57/* Mod-Exp, with a small modulus */
58struct type50_meb1_msg {
59	struct type50_hdr header;
60	unsigned short	keyblock_type;	/* 0x0001 */
61	unsigned char	reserved[6];
62	unsigned char	exponent[128];
63	unsigned char	modulus[128];
64	unsigned char	message[128];
65} __attribute__((packed));
66
67/* Mod-Exp, with a large modulus */
68struct type50_meb2_msg {
69	struct type50_hdr header;
70	unsigned short	keyblock_type;	/* 0x0002 */
71	unsigned char	reserved[6];
72	unsigned char	exponent[256];
73	unsigned char	modulus[256];
74	unsigned char	message[256];
75} __attribute__((packed));
76
77/* CRT, with a small modulus */
78struct type50_crb1_msg {
79	struct type50_hdr header;
80	unsigned short	keyblock_type;	/* 0x0011 */
81	unsigned char	reserved[6];
82	unsigned char	p[64];
83	unsigned char	q[64];
84	unsigned char	dp[64];
85	unsigned char	dq[64];
86	unsigned char	u[64];
87	unsigned char	message[128];
88} __attribute__((packed));
89
90/* CRT, with a large modulus */
91struct type50_crb2_msg {
92	struct type50_hdr header;
93	unsigned short	keyblock_type;	/* 0x0012 */
94	unsigned char	reserved[6];
95	unsigned char	p[128];
96	unsigned char	q[128];
97	unsigned char	dp[128];
98	unsigned char	dq[128];
99	unsigned char	u[128];
100	unsigned char	message[256];
101} __attribute__((packed));
102
103/**
104 * The type 80 response family is associated with a CEX2A card.
105 *
106 * Note that all unsigned char arrays are right-justified and left-padded
107 * with zeroes.
108 *
109 * Note that all reserved fields must be zeroes.
110 */
111
112#define TYPE80_RSP_CODE 0x80
113
114struct type80_hdr {
115	unsigned char	reserved1;
116	unsigned char	type;		/* 0x80 */
117	unsigned short	len;
118	unsigned char	code;		/* 0x00 */
119	unsigned char	reserved2[3];
120	unsigned char	reserved3[8];
121} __attribute__((packed));
122
123int zcrypt_cex2a_init(void);
124void zcrypt_cex2a_exit(void);
125
126#endif /* _ZCRYPT_CEX2A_H_ */
127