Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
d00a1c72 MZ |
2 | #ifndef __TRUSTED_KEY_H |
3 | #define __TRUSTED_KEY_H | |
4 | ||
5 | /* implementation specific TPM constants */ | |
e1ea9f86 | 6 | #define MAX_BUF_SIZE 1024 |
d00a1c72 MZ |
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 | ||
e1ea9f86 DK |
39 | int TSS_authhmac(unsigned char *digest, const unsigned char *key, |
40 | unsigned int keylen, unsigned char *h1, | |
be24b37e | 41 | unsigned char *h2, unsigned int h3, ...); |
e1ea9f86 DK |
42 | int TSS_checkhmac1(unsigned char *buffer, |
43 | const uint32_t command, | |
44 | const unsigned char *ononce, | |
45 | const unsigned char *key, | |
46 | unsigned int keylen, ...); | |
47 | ||
48 | int trusted_tpm_send(unsigned char *cmd, size_t buflen); | |
49 | int oiap(struct tpm_buf *tb, uint32_t *handle, unsigned char *nonce); | |
50 | ||
d00a1c72 MZ |
51 | #define TPM_DEBUG 0 |
52 | ||
53 | #if TPM_DEBUG | |
54 | static inline void dump_options(struct trusted_key_options *o) | |
55 | { | |
56 | pr_info("trusted_key: sealing key type %d\n", o->keytype); | |
57 | pr_info("trusted_key: sealing key handle %0X\n", o->keyhandle); | |
58 | pr_info("trusted_key: pcrlock %d\n", o->pcrlock); | |
59 | pr_info("trusted_key: pcrinfo %d\n", o->pcrinfo_len); | |
60 | print_hex_dump(KERN_INFO, "pcrinfo ", DUMP_PREFIX_NONE, | |
61 | 16, 1, o->pcrinfo, o->pcrinfo_len, 0); | |
62 | } | |
63 | ||
64 | static inline void dump_payload(struct trusted_key_payload *p) | |
65 | { | |
66 | pr_info("trusted_key: key_len %d\n", p->key_len); | |
67 | print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE, | |
68 | 16, 1, p->key, p->key_len, 0); | |
69 | pr_info("trusted_key: bloblen %d\n", p->blob_len); | |
70 | print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE, | |
71 | 16, 1, p->blob, p->blob_len, 0); | |
72 | pr_info("trusted_key: migratable %d\n", p->migratable); | |
73 | } | |
74 | ||
75 | static inline void dump_sess(struct osapsess *s) | |
76 | { | |
77 | print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE, | |
78 | 16, 1, &s->handle, 4, 0); | |
79 | pr_info("trusted-key: secret:\n"); | |
80 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, | |
81 | 16, 1, &s->secret, SHA1_DIGEST_SIZE, 0); | |
82 | pr_info("trusted-key: enonce:\n"); | |
83 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, | |
84 | 16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0); | |
85 | } | |
86 | ||
87 | static inline void dump_tpm_buf(unsigned char *buf) | |
88 | { | |
89 | int len; | |
90 | ||
91 | pr_info("\ntrusted-key: tpm buffer\n"); | |
92 | len = LOAD32(buf, TPM_SIZE_OFFSET); | |
93 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0); | |
94 | } | |
95 | #else | |
96 | static inline void dump_options(struct trusted_key_options *o) | |
97 | { | |
98 | } | |
99 | ||
100 | static inline void dump_payload(struct trusted_key_payload *p) | |
101 | { | |
102 | } | |
103 | ||
104 | static inline void dump_sess(struct osapsess *s) | |
105 | { | |
106 | } | |
107 | ||
108 | static inline void dump_tpm_buf(unsigned char *buf) | |
109 | { | |
110 | } | |
111 | #endif | |
112 | ||
113 | static inline void store8(struct tpm_buf *buf, const unsigned char value) | |
114 | { | |
115 | buf->data[buf->len++] = value; | |
116 | } | |
117 | ||
118 | static inline void store16(struct tpm_buf *buf, const uint16_t value) | |
119 | { | |
120 | *(uint16_t *) & buf->data[buf->len] = htons(value); | |
121 | buf->len += sizeof value; | |
122 | } | |
123 | ||
124 | static inline void store32(struct tpm_buf *buf, const uint32_t value) | |
125 | { | |
126 | *(uint32_t *) & buf->data[buf->len] = htonl(value); | |
127 | buf->len += sizeof value; | |
128 | } | |
129 | ||
130 | static inline void storebytes(struct tpm_buf *buf, const unsigned char *in, | |
131 | const int len) | |
132 | { | |
133 | memcpy(buf->data + buf->len, in, len); | |
134 | buf->len += len; | |
135 | } | |
136 | #endif |