1#ifndef __TRUSTED_KEY_H
2#define __TRUSTED_KEY_H
3
4/* implementation specific TPM constants */
5#define MAX_PCRINFO_SIZE		64
6#define MAX_BUF_SIZE			512
7#define TPM_GETRANDOM_SIZE		14
8#define TPM_OSAP_SIZE			36
9#define TPM_OIAP_SIZE			10
10#define TPM_SEAL_SIZE			87
11#define TPM_UNSEAL_SIZE			104
12#define TPM_SIZE_OFFSET			2
13#define TPM_RETURN_OFFSET		6
14#define TPM_DATA_OFFSET			10
15
16#define LOAD32(buffer, offset)	(ntohl(*(uint32_t *)&buffer[offset]))
17#define LOAD32N(buffer, offset)	(*(uint32_t *)&buffer[offset])
18#define LOAD16(buffer, offset)	(ntohs(*(uint16_t *)&buffer[offset]))
19
20struct tpm_buf {
21	int len;
22	unsigned char data[MAX_BUF_SIZE];
23};
24
25#define INIT_BUF(tb) (tb->len = 0)
26
27struct osapsess {
28	uint32_t handle;
29	unsigned char secret[SHA1_DIGEST_SIZE];
30	unsigned char enonce[TPM_NONCE_SIZE];
31};
32
33/* discrete values, but have to store in uint16_t for TPM use */
34enum {
35	SEAL_keytype = 1,
36	SRK_keytype = 4
37};
38
39struct trusted_key_options {
40	uint16_t keytype;
41	uint32_t keyhandle;
42	unsigned char keyauth[SHA1_DIGEST_SIZE];
43	unsigned char blobauth[SHA1_DIGEST_SIZE];
44	uint32_t pcrinfo_len;
45	unsigned char pcrinfo[MAX_PCRINFO_SIZE];
46	int pcrlock;
47};
48
49#define TPM_DEBUG 0
50
51#if TPM_DEBUG
52static inline void dump_options(struct trusted_key_options *o)
53{
54	pr_info("trusted_key: sealing key type %d\n", o->keytype);
55	pr_info("trusted_key: sealing key handle %0X\n", o->keyhandle);
56	pr_info("trusted_key: pcrlock %d\n", o->pcrlock);
57	pr_info("trusted_key: pcrinfo %d\n", o->pcrinfo_len);
58	print_hex_dump(KERN_INFO, "pcrinfo ", DUMP_PREFIX_NONE,
59		       16, 1, o->pcrinfo, o->pcrinfo_len, 0);
60}
61
62static inline void dump_payload(struct trusted_key_payload *p)
63{
64	pr_info("trusted_key: key_len %d\n", p->key_len);
65	print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE,
66		       16, 1, p->key, p->key_len, 0);
67	pr_info("trusted_key: bloblen %d\n", p->blob_len);
68	print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE,
69		       16, 1, p->blob, p->blob_len, 0);
70	pr_info("trusted_key: migratable %d\n", p->migratable);
71}
72
73static inline void dump_sess(struct osapsess *s)
74{
75	print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE,
76		       16, 1, &s->handle, 4, 0);
77	pr_info("trusted-key: secret:\n");
78	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
79		       16, 1, &s->secret, SHA1_DIGEST_SIZE, 0);
80	pr_info("trusted-key: enonce:\n");
81	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
82		       16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0);
83}
84
85static inline void dump_tpm_buf(unsigned char *buf)
86{
87	int len;
88
89	pr_info("\ntrusted-key: tpm buffer\n");
90	len = LOAD32(buf, TPM_SIZE_OFFSET);
91	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0);
92}
93#else
94static inline void dump_options(struct trusted_key_options *o)
95{
96}
97
98static inline void dump_payload(struct trusted_key_payload *p)
99{
100}
101
102static inline void dump_sess(struct osapsess *s)
103{
104}
105
106static inline void dump_tpm_buf(unsigned char *buf)
107{
108}
109#endif
110
111static inline void store8(struct tpm_buf *buf, const unsigned char value)
112{
113	buf->data[buf->len++] = value;
114}
115
116static inline void store16(struct tpm_buf *buf, const uint16_t value)
117{
118	*(uint16_t *) & buf->data[buf->len] = htons(value);
119	buf->len += sizeof value;
120}
121
122static inline void store32(struct tpm_buf *buf, const uint32_t value)
123{
124	*(uint32_t *) & buf->data[buf->len] = htonl(value);
125	buf->len += sizeof value;
126}
127
128static inline void storebytes(struct tpm_buf *buf, const unsigned char *in,
129			      const int len)
130{
131	memcpy(buf->data + buf->len, in, len);
132	buf->len += len;
133}
134#endif
135