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