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
179
180
181
182
183
184
|
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright IBM Corp. 2024
*
* Pkey base: debug feature, defines and structs
* common to all pkey code.
*/
#ifndef _PKEY_BASE_H_
#define _PKEY_BASE_H_
#include <linux/types.h>
#include <asm/debug.h>
#include <asm/pkey.h>
/*
* pkey debug feature
*/
extern debug_info_t *pkey_dbf_info;
#define PKEY_DBF_INFO(...) debug_sprintf_event(pkey_dbf_info, 5, ##__VA_ARGS__)
#define PKEY_DBF_WARN(...) debug_sprintf_event(pkey_dbf_info, 4, ##__VA_ARGS__)
#define PKEY_DBF_ERR(...) debug_sprintf_event(pkey_dbf_info, 3, ##__VA_ARGS__)
/*
* common defines and common structs
*/
#define KEYBLOBBUFSIZE 8192 /* key buffer size used for internal processing */
#define MINKEYBLOBBUFSIZE (sizeof(struct keytoken_header))
#define PROTKEYBLOBBUFSIZE 256 /* protected key buffer size used internal */
#define MAXAPQNSINLIST 64 /* max 64 apqns within a apqn list */
#define AES_WK_VP_SIZE 32 /* Size of WK VP block appended to a prot key */
/* inside view of a protected key token (only type 0x00 version 0x01) */
struct protaeskeytoken {
u8 type; /* 0x00 for PAES specific key tokens */
u8 res0[3];
u8 version; /* should be 0x01 for protected AES key token */
u8 res1[3];
u32 keytype; /* key type, one of the PKEY_KEYTYPE values */
u32 len; /* bytes actually stored in protkey[] */
u8 protkey[MAXPROTKEYSIZE]; /* the protected key blob */
} __packed;
/* inside view of a clear key token (type 0x00 version 0x02) */
struct clearkeytoken {
u8 type; /* 0x00 for PAES specific key tokens */
u8 res0[3];
u8 version; /* 0x02 for clear key token */
u8 res1[3];
u32 keytype; /* key type, one of the PKEY_KEYTYPE_* values */
u32 len; /* bytes actually stored in clearkey[] */
u8 clearkey[]; /* clear key value */
} __packed;
/* helper function which translates the PKEY_KEYTYPE_AES_* to their keysize */
static inline u32 pkey_keytype_aes_to_size(u32 keytype)
{
switch (keytype) {
case PKEY_KEYTYPE_AES_128:
return 16;
case PKEY_KEYTYPE_AES_192:
return 24;
case PKEY_KEYTYPE_AES_256:
return 32;
default:
return 0;
}
}
/* helper function which translates AES key bit size into PKEY_KEYTYPE_AES_* */
static inline u32 pkey_aes_bitsize_to_keytype(u32 keybitsize)
{
switch (keybitsize) {
case 128:
return PKEY_KEYTYPE_AES_128;
case 192:
return PKEY_KEYTYPE_AES_192;
case 256:
return PKEY_KEYTYPE_AES_256;
default:
return 0;
}
}
/*
* pkey_api.c:
*/
int __init pkey_api_init(void);
void __exit pkey_api_exit(void);
/*
* pkey_sysfs.c:
*/
extern const struct attribute_group *pkey_attr_groups[];
/*
* pkey handler registry
*/
struct pkey_handler {
struct module *module;
const char *name;
/*
* is_supported_key() and is_supported_keytype() are called
* within an rcu_read_lock() scope and thus must not sleep!
*/
bool (*is_supported_key)(const u8 *key, u32 keylen);
bool (*is_supported_keytype)(enum pkey_key_type);
int (*key_to_protkey)(const struct pkey_apqn *apqns, size_t nr_apqns,
const u8 *key, u32 keylen,
u8 *protkey, u32 *protkeylen, u32 *protkeytype);
int (*slowpath_key_to_protkey)(const struct pkey_apqn *apqns,
size_t nr_apqns,
const u8 *key, u32 keylen,
u8 *protkey, u32 *protkeylen,
u32 *protkeytype);
int (*gen_key)(const struct pkey_apqn *apqns, size_t nr_apqns,
u32 keytype, u32 keysubtype,
u32 keybitsize, u32 flags,
u8 *keybuf, u32 *keybuflen, u32 *keyinfo);
int (*clr_to_key)(const struct pkey_apqn *apqns, size_t nr_apqns,
u32 keytype, u32 keysubtype,
u32 keybitsize, u32 flags,
const u8 *clrkey, u32 clrkeylen,
u8 *keybuf, u32 *keybuflen, u32 *keyinfo);
int (*verify_key)(const u8 *key, u32 keylen,
u16 *card, u16 *dom,
u32 *keytype, u32 *keybitsize, u32 *flags);
int (*apqns_for_key)(const u8 *key, u32 keylen, u32 flags,
struct pkey_apqn *apqns, size_t *nr_apqns);
int (*apqns_for_keytype)(enum pkey_key_type ktype,
u8 cur_mkvp[32], u8 alt_mkvp[32], u32 flags,
struct pkey_apqn *apqns, size_t *nr_apqns);
/* used internal by pkey base */
struct list_head list;
};
int pkey_handler_register(struct pkey_handler *handler);
int pkey_handler_unregister(struct pkey_handler *handler);
/*
* invocation function for the registered pkey handlers
*/
const struct pkey_handler *pkey_handler_get_keybased(const u8 *key, u32 keylen);
const struct pkey_handler *pkey_handler_get_keytypebased(enum pkey_key_type kt);
void pkey_handler_put(const struct pkey_handler *handler);
int pkey_handler_key_to_protkey(const struct pkey_apqn *apqns, size_t nr_apqns,
const u8 *key, u32 keylen,
u8 *protkey, u32 *protkeylen, u32 *protkeytype);
int pkey_handler_slowpath_key_to_protkey(const struct pkey_apqn *apqns,
size_t nr_apqns,
const u8 *key, u32 keylen,
u8 *protkey, u32 *protkeylen,
u32 *protkeytype);
int pkey_handler_gen_key(const struct pkey_apqn *apqns, size_t nr_apqns,
u32 keytype, u32 keysubtype,
u32 keybitsize, u32 flags,
u8 *keybuf, u32 *keybuflen, u32 *keyinfo);
int pkey_handler_clr_to_key(const struct pkey_apqn *apqns, size_t nr_apqns,
u32 keytype, u32 keysubtype,
u32 keybitsize, u32 flags,
const u8 *clrkey, u32 clrkeylen,
u8 *keybuf, u32 *keybuflen, u32 *keyinfo);
int pkey_handler_verify_key(const u8 *key, u32 keylen,
u16 *card, u16 *dom,
u32 *keytype, u32 *keybitsize, u32 *flags);
int pkey_handler_apqns_for_key(const u8 *key, u32 keylen, u32 flags,
struct pkey_apqn *apqns, size_t *nr_apqns);
int pkey_handler_apqns_for_keytype(enum pkey_key_type ktype,
u8 cur_mkvp[32], u8 alt_mkvp[32], u32 flags,
struct pkey_apqn *apqns, size_t *nr_apqns);
/*
* Unconditional try to load all handler modules
*/
void pkey_handler_request_modules(void);
#endif /* _PKEY_BASE_H_ */
|
