Root/security/keys/trusted.h

Source at commit be977234bfb4a6dca8a39e7c52165e4cd536ad71 created 9 years 5 months ago.
By Lars-Peter Clausen, jz4740: Fix compile error
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

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