Linux Kernel  3.7.1
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trusted.h
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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 
20 struct tpm_buf {
21  int len;
22  unsigned char data[MAX_BUF_SIZE];
23 };
24 
25 #define INIT_BUF(tb) (tb->len = 0)
26 
27 struct osapsess {
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 */
34 enum {
37 };
38 
42  unsigned char keyauth[SHA1_DIGEST_SIZE];
43  unsigned char blobauth[SHA1_DIGEST_SIZE];
45  unsigned char pcrinfo[MAX_PCRINFO_SIZE];
46  int pcrlock;
47 };
48 
49 #define TPM_DEBUG 0
50 
51 #if TPM_DEBUG
52 static 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 
62 static 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 
73 static 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 
85 static 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
94 static inline void dump_options(struct trusted_key_options *o)
95 {
96 }
97 
98 static inline void dump_payload(struct trusted_key_payload *p)
99 {
100 }
101 
102 static inline void dump_sess(struct osapsess *s)
103 {
104 }
105 
106 static inline void dump_tpm_buf(unsigned char *buf)
107 {
108 }
109 #endif
110 
111 static inline void store8(struct tpm_buf *buf, const unsigned char value)
112 {
113  buf->data[buf->len++] = value;
114 }
115 
116 static 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 
122 static 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 
128 static 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