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 MAX_BUF_SIZE 1024 10 #define TPM_GETRANDOM_SIZE 14 11 #define TPM_SIZE_OFFSET 2 12 #define TPM_RETURN_OFFSET 6 13 #define TPM_DATA_OFFSET 10 14 15 #define LOAD32(buffer, offset) (ntohl(*(uint32_t *)&buffer[offset])) 16 #define LOAD32N(buffer, offset) (*(uint32_t *)&buffer[offset]) 17 #define LOAD16(buffer, offset) (ntohs(*(uint16_t *)&buffer[offset])) 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("trusted_key: sealing key type %d\n", o->keytype); 56 pr_info("trusted_key: sealing key handle %0X\n", o->keyhandle); 57 pr_info("trusted_key: pcrlock %d\n", o->pcrlock); 58 pr_info("trusted_key: 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_payload(struct trusted_key_payload *p) 64 { 65 pr_info("trusted_key: key_len %d\n", p->key_len); 66 print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE, 67 16, 1, p->key, p->key_len, 0); 68 pr_info("trusted_key: bloblen %d\n", p->blob_len); 69 print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE, 70 16, 1, p->blob, p->blob_len, 0); 71 pr_info("trusted_key: migratable %d\n", p->migratable); 72 } 73 74 static inline void dump_sess(struct osapsess *s) 75 { 76 print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE, 77 16, 1, &s->handle, 4, 0); 78 pr_info("trusted-key: secret:\n"); 79 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 80 16, 1, &s->secret, SHA1_DIGEST_SIZE, 0); 81 pr_info("trusted-key: enonce:\n"); 82 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 83 16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0); 84 } 85 86 static inline void dump_tpm_buf(unsigned char *buf) 87 { 88 int len; 89 90 pr_info("\ntrusted-key: tpm buffer\n"); 91 len = LOAD32(buf, TPM_SIZE_OFFSET); 92 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0); 93 } 94 #else 95 static inline void dump_options(struct trusted_key_options *o) 96 { 97 } 98 99 static inline void dump_payload(struct trusted_key_payload *p) 100 { 101 } 102 103 static inline void dump_sess(struct osapsess *s) 104 { 105 } 106 107 static inline void dump_tpm_buf(unsigned char *buf) 108 { 109 } 110 #endif 111 #endif 112