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 extern struct trusted_key_ops trusted_key_tpm_ops; 20 21 struct osapsess { 22 uint32_t handle; 23 unsigned char secret[SHA1_DIGEST_SIZE]; 24 unsigned char enonce[TPM_NONCE_SIZE]; 25 }; 26 27 /* discrete values, but have to store in uint16_t for TPM use */ 28 enum { 29 SEAL_keytype = 1, 30 SRK_keytype = 4 31 }; 32 33 int TSS_authhmac(unsigned char *digest, const unsigned char *key, 34 unsigned int keylen, unsigned char *h1, 35 unsigned char *h2, unsigned int h3, ...); 36 int TSS_checkhmac1(unsigned char *buffer, 37 const uint32_t command, 38 const unsigned char *ononce, 39 const unsigned char *key, 40 unsigned int keylen, ...); 41 42 int trusted_tpm_send(unsigned char *cmd, size_t buflen); 43 int oiap(struct tpm_buf *tb, uint32_t *handle, unsigned char *nonce); 44 45 int tpm2_seal_trusted(struct tpm_chip *chip, 46 struct trusted_key_payload *payload, 47 struct trusted_key_options *options); 48 int tpm2_unseal_trusted(struct tpm_chip *chip, 49 struct trusted_key_payload *payload, 50 struct trusted_key_options *options); 51 52 #define TPM_DEBUG 0 53 54 #if TPM_DEBUG dump_options(struct trusted_key_options * o)55 static inline void dump_options(struct trusted_key_options *o) 56 { 57 pr_info("sealing key type %d\n", o->keytype); 58 pr_info("sealing key handle %0X\n", o->keyhandle); 59 pr_info("pcrlock %d\n", o->pcrlock); 60 pr_info("pcrinfo %d\n", o->pcrinfo_len); 61 print_hex_dump(KERN_INFO, "pcrinfo ", DUMP_PREFIX_NONE, 62 16, 1, o->pcrinfo, o->pcrinfo_len, 0); 63 } 64 dump_sess(struct osapsess * s)65 static inline void dump_sess(struct osapsess *s) 66 { 67 print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE, 68 16, 1, &s->handle, 4, 0); 69 pr_info("secret:\n"); 70 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 71 16, 1, &s->secret, SHA1_DIGEST_SIZE, 0); 72 pr_info("trusted-key: enonce:\n"); 73 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 74 16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0); 75 } 76 dump_tpm_buf(unsigned char * buf)77 static inline void dump_tpm_buf(unsigned char *buf) 78 { 79 int len; 80 81 pr_info("\ntpm buffer\n"); 82 len = LOAD32(buf, TPM_SIZE_OFFSET); 83 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0); 84 } 85 #else dump_options(struct trusted_key_options * o)86 static inline void dump_options(struct trusted_key_options *o) 87 { 88 } 89 dump_sess(struct osapsess * s)90 static inline void dump_sess(struct osapsess *s) 91 { 92 } 93 dump_tpm_buf(unsigned char * buf)94 static inline void dump_tpm_buf(unsigned char *buf) 95 { 96 } 97 #endif 98 #endif 99
