1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __TRUSTED_TPM_H
3 #define __TRUSTED_TPM_H
4
5 #include <keys/trusted-type.h>
6 #include <linux/tpm_command.h>
7
8 /* implementation specific TPM constants */
9 #define TPM_SIZE_OFFSET 2
10 #define TPM_RETURN_OFFSET 6
11 #define TPM_DATA_OFFSET 10
12
13 #define LOAD32(buffer, offset) (ntohl(*(uint32_t *)&buffer[offset]))
14 #define LOAD32N(buffer, offset) (*(uint32_t *)&buffer[offset])
15 #define LOAD16(buffer, offset) (ntohs(*(uint16_t *)&buffer[offset]))
16
17 extern struct trusted_key_ops trusted_key_tpm_ops;
18
19 struct osapsess {
20 uint32_t handle;
21 unsigned char secret[SHA1_DIGEST_SIZE];
22 unsigned char enonce[TPM_NONCE_SIZE];
23 };
24
25 /* discrete values, but have to store in uint16_t for TPM use */
26 enum {
27 SEAL_keytype = 1,
28 SRK_keytype = 4
29 };
30
31 int TSS_authhmac(unsigned char *digest, const unsigned char *key,
32 unsigned int keylen, unsigned char *h1,
33 unsigned char *h2, unsigned int h3, ...);
34 int TSS_checkhmac1(unsigned char *buffer,
35 const uint32_t command,
36 const unsigned char *ononce,
37 const unsigned char *key,
38 unsigned int keylen, ...);
39
40 int trusted_tpm_send(unsigned char *cmd, size_t buflen);
41 int oiap(struct tpm_buf *tb, uint32_t *handle, unsigned char *nonce);
42
43 int tpm2_seal_trusted(struct tpm_chip *chip,
44 struct trusted_key_payload *payload,
45 struct trusted_key_options *options);
46 int tpm2_unseal_trusted(struct tpm_chip *chip,
47 struct trusted_key_payload *payload,
48 struct trusted_key_options *options);
49
50 #define TPM_DEBUG 0
51
52 #if TPM_DEBUG
53 static inline void dump_options(struct trusted_key_options *o)
54 {
55 pr_info("sealing key type %d\n", o->keytype);
56 pr_info("sealing key handle %0X\n", o->keyhandle);
57 pr_info("pcrlock %d\n", o->pcrlock);
58 pr_info("pcrinfo %d\n", o->pcrinfo_len);
59 print_hex_dump(KERN_INFO, "pcrinfo ", DUMP_PREFIX_NONE,
60 16, 1, o->pcrinfo, o->pcrinfo_len, 0);
61 }
62
63 static inline void dump_sess(struct osapsess *s)
64 {
65 print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE,
66 16, 1, &s->handle, 4, 0);
67 pr_info("secret:\n");
68 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
69 16, 1, &s->secret, SHA1_DIGEST_SIZE, 0);
70 pr_info("trusted-key: enonce:\n");
71 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
72 16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0);
73 }
74
75 static inline void dump_tpm_buf(unsigned char *buf)
76 {
77 int len;
78
79 pr_info("\ntpm buffer\n");
80 len = LOAD32(buf, TPM_SIZE_OFFSET);
81 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0);
82 }
83 #else
84 static inline void dump_options(struct trusted_key_options *o)
85 {
86 }
87
88 static inline void dump_sess(struct osapsess *s)
89 {
90 }
91
92 static inline void dump_tpm_buf(unsigned char *buf)
93 {
94 }
95 #endif
96 #endif
97
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