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