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 {
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 */
34 enum {
35 SEAL_keytype = 1,
36 SRK_keytype = 4
37 };
38
39 struct 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
dump_options(struct trusted_key_options * o)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
dump_payload(struct trusted_key_payload * p)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
dump_sess(struct osapsess * s)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
dump_tpm_buf(unsigned char * buf)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
dump_options(struct trusted_key_options * o)94 static inline void dump_options(struct trusted_key_options *o)
95 {
96 }
97
dump_payload(struct trusted_key_payload * p)98 static inline void dump_payload(struct trusted_key_payload *p)
99 {
100 }
101
dump_sess(struct osapsess * s)102 static inline void dump_sess(struct osapsess *s)
103 {
104 }
105
dump_tpm_buf(unsigned char * buf)106 static inline void dump_tpm_buf(unsigned char *buf)
107 {
108 }
109 #endif
110
store8(struct tpm_buf * buf,const unsigned char value)111 static inline void store8(struct tpm_buf *buf, const unsigned char value)
112 {
113 buf->data[buf->len++] = value;
114 }
115
store16(struct tpm_buf * buf,const uint16_t value)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
store32(struct tpm_buf * buf,const uint32_t value)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
storebytes(struct tpm_buf * buf,const unsigned char * in,const int len)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
135