1#ifndef __TRUSTED_KEY_H 2#define __TRUSTED_KEY_H 3 4/* implementation specific TPM constants */ 5#define MAX_BUF_SIZE 512 6#define TPM_GETRANDOM_SIZE 14 7#define TPM_OSAP_SIZE 36 8#define TPM_OIAP_SIZE 10 9#define TPM_SEAL_SIZE 87 10#define TPM_UNSEAL_SIZE 104 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 19struct tpm_buf { 20 int len; 21 unsigned char data[MAX_BUF_SIZE]; 22}; 23 24#define INIT_BUF(tb) (tb->len = 0) 25 26struct osapsess { 27 uint32_t handle; 28 unsigned char secret[SHA1_DIGEST_SIZE]; 29 unsigned char enonce[TPM_NONCE_SIZE]; 30}; 31 32/* discrete values, but have to store in uint16_t for TPM use */ 33enum { 34 SEAL_keytype = 1, 35 SRK_keytype = 4 36}; 37 38#define TPM_DEBUG 0 39 40#if TPM_DEBUG 41static inline void dump_options(struct trusted_key_options *o) 42{ 43 pr_info("trusted_key: sealing key type %d\n", o->keytype); 44 pr_info("trusted_key: sealing key handle %0X\n", o->keyhandle); 45 pr_info("trusted_key: pcrlock %d\n", o->pcrlock); 46 pr_info("trusted_key: pcrinfo %d\n", o->pcrinfo_len); 47 print_hex_dump(KERN_INFO, "pcrinfo ", DUMP_PREFIX_NONE, 48 16, 1, o->pcrinfo, o->pcrinfo_len, 0); 49} 50 51static inline void dump_payload(struct trusted_key_payload *p) 52{ 53 pr_info("trusted_key: key_len %d\n", p->key_len); 54 print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE, 55 16, 1, p->key, p->key_len, 0); 56 pr_info("trusted_key: bloblen %d\n", p->blob_len); 57 print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE, 58 16, 1, p->blob, p->blob_len, 0); 59 pr_info("trusted_key: migratable %d\n", p->migratable); 60} 61 62static inline void dump_sess(struct osapsess *s) 63{ 64 print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE, 65 16, 1, &s->handle, 4, 0); 66 pr_info("trusted-key: secret:\n"); 67 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 68 16, 1, &s->secret, SHA1_DIGEST_SIZE, 0); 69 pr_info("trusted-key: enonce:\n"); 70 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 71 16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0); 72} 73 74static inline void dump_tpm_buf(unsigned char *buf) 75{ 76 int len; 77 78 pr_info("\ntrusted-key: tpm buffer\n"); 79 len = LOAD32(buf, TPM_SIZE_OFFSET); 80 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0); 81} 82#else 83static inline void dump_options(struct trusted_key_options *o) 84{ 85} 86 87static inline void dump_payload(struct trusted_key_payload *p) 88{ 89} 90 91static inline void dump_sess(struct osapsess *s) 92{ 93} 94 95static inline void dump_tpm_buf(unsigned char *buf) 96{ 97} 98#endif 99 100static inline void store8(struct tpm_buf *buf, const unsigned char value) 101{ 102 buf->data[buf->len++] = value; 103} 104 105static inline void store16(struct tpm_buf *buf, const uint16_t value) 106{ 107 *(uint16_t *) & buf->data[buf->len] = htons(value); 108 buf->len += sizeof value; 109} 110 111static inline void store32(struct tpm_buf *buf, const uint32_t value) 112{ 113 *(uint32_t *) & buf->data[buf->len] = htonl(value); 114 buf->len += sizeof value; 115} 116 117static inline void storebytes(struct tpm_buf *buf, const unsigned char *in, 118 const int len) 119{ 120 memcpy(buf->data + buf->len, in, len); 121 buf->len += len; 122} 123#endif 124