1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/* Virtual Smart Card protocol definition
*
* This protocol is between a host using virtual smart card readers,
* and a client providing the smart cards, perhaps by emulating them or by
* access to real cards.
*
* Definitions for this protocol:
* Host - user of the card
* Client - owner of the card
*
* The current implementation passes the raw APDU's from 7816 and additionally
* contains messages to setup and teardown readers, handle insertion and
* removal of cards, negotiate the protocol via capabilities and provide
* for error responses.
*
* Copyright (c) 2011 Red Hat.
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#ifndef VSCARD_COMMON_H
#define VSCARD_COMMON_H
#include <stdint.h>
#define VERSION_MAJOR_BITS 11
#define VERSION_MIDDLE_BITS 11
#define VERSION_MINOR_BITS 10
#define MAKE_VERSION(major, middle, minor) \
((major << (VERSION_MINOR_BITS + VERSION_MIDDLE_BITS)) \
| (middle << VERSION_MINOR_BITS) \
| (minor))
/*
* IMPORTANT NOTE on VERSION
*
* The version below MUST be changed whenever a change in this file is made.
*
* The last digit, the minor, is for bug fix changes only.
*
* The middle digit is for backward / forward compatible changes, updates
* to the existing messages, addition of fields.
*
* The major digit is for a breaking change of protocol, presumably
* something that cannot be accommodated with the existing protocol.
*/
#define VSCARD_VERSION MAKE_VERSION(0, 0, 2)
typedef enum VSCMsgType {
VSC_Init = 1,
VSC_Error,
VSC_ReaderAdd,
VSC_ReaderRemove,
VSC_ATR,
VSC_CardRemove,
VSC_APDU,
VSC_Flush,
VSC_FlushComplete
} VSCMsgType;
typedef enum VSCErrorCode {
VSC_SUCCESS = 0,
VSC_GENERAL_ERROR = 1,
VSC_CANNOT_ADD_MORE_READERS,
VSC_CARD_ALREAY_INSERTED,
} VSCErrorCode;
#define VSCARD_UNDEFINED_READER_ID 0xffffffff
#define VSCARD_MINIMAL_READER_ID 0
#define VSCARD_MAGIC (*(uint32_t *)"VSCD")
/*
* Header
* Each message starts with the header.
* type - message type
* reader_id - used by messages that are reader specific
* length - length of payload (not including header, i.e. zero for
* messages containing empty payloads)
*/
typedef struct VSCMsgHeader {
uint32_t type;
uint32_t reader_id;
uint32_t length;
uint8_t data[0];
} VSCMsgHeader;
/*
* VSCMsgInit Client <-> Host
* Client sends it on connection, with its own capabilities.
* Host replies with VSCMsgInit filling in its capabilities.
*
* It is not meant to be used for negotiation, i.e. sending more then
* once from any side, but could be used for that in the future.
*/
typedef struct VSCMsgInit {
uint32_t magic;
uint32_t version;
uint32_t capabilities[1]; /* receiver must check length,
array may grow in the future*/
} VSCMsgInit;
/*
* VSCMsgError Client <-> Host
* This message is a response to any of:
* Reader Add
* Reader Remove
* Card Remove
* If the operation was successful then VSC_SUCCESS
* is returned, other wise a specific error code.
*/
typedef struct VSCMsgError {
uint32_t code;
} VSCMsgError;
/*
* VSCMsgReaderAdd Client -> Host
* Host replies with allocated reader id in VSCMsgError with code==SUCCESS.
*
* name - name of the reader on client side, UTF-8 encoded. Only used
* for client presentation (may be translated to the device presented to the
* guest), protocol wise only reader_id is important.
*/
typedef struct VSCMsgReaderAdd {
uint8_t name[0];
} VSCMsgReaderAdd;
/*
* VSCMsgReaderRemove Client -> Host
* The client's reader has been removed.
*/
typedef struct VSCMsgReaderRemove {
} VSCMsgReaderRemove;
/*
* VSCMsgATR Client -> Host
* Answer to reset. Sent for card insertion or card reset. The reset/insertion
* happens on the client side, they do not require any action from the host.
*/
typedef struct VSCMsgATR {
uint8_t atr[0];
} VSCMsgATR;
/*
* VSCMsgCardRemove Client -> Host
* The client card has been removed.
*/
typedef struct VSCMsgCardRemove {
} VSCMsgCardRemove;
/*
* VSCMsgAPDU Client <-> Host
* Main reason of existence. Transfer a single APDU in either direction.
*/
typedef struct VSCMsgAPDU {
uint8_t data[0];
} VSCMsgAPDU;
/*
* VSCMsgFlush Host -> Client
* Request client to send a FlushComplete message when it is done
* servicing all outstanding APDUs
*/
typedef struct VSCMsgFlush {
} VSCMsgFlush;
/*
* VSCMsgFlush Client -> Host
* Client response to Flush after all APDUs have been processed and
* responses sent.
*/
typedef struct VSCMsgFlushComplete {
} VSCMsgFlushComplete;
#endif /* VSCARD_COMMON_H */
|
