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-rw-r--r--include/keys/trusted_tpm.h111
1 files changed, 111 insertions, 0 deletions
diff --git a/include/keys/trusted_tpm.h b/include/keys/trusted_tpm.h
new file mode 100644
index 000000000..a56d8e129
--- /dev/null
+++ b/include/keys/trusted_tpm.h
@@ -0,0 +1,111 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __TRUSTED_TPM_H
+#define __TRUSTED_TPM_H
+
+#include <keys/trusted-type.h>
+#include <linux/tpm_command.h>
+
+/* implementation specific TPM constants */
+#define MAX_BUF_SIZE 1024
+#define TPM_GETRANDOM_SIZE 14
+#define TPM_SIZE_OFFSET 2
+#define TPM_RETURN_OFFSET 6
+#define TPM_DATA_OFFSET 10
+
+#define LOAD32(buffer, offset) (ntohl(*(uint32_t *)&buffer[offset]))
+#define LOAD32N(buffer, offset) (*(uint32_t *)&buffer[offset])
+#define LOAD16(buffer, offset) (ntohs(*(uint16_t *)&buffer[offset]))
+
+struct osapsess {
+ uint32_t handle;
+ unsigned char secret[SHA1_DIGEST_SIZE];
+ unsigned char enonce[TPM_NONCE_SIZE];
+};
+
+/* discrete values, but have to store in uint16_t for TPM use */
+enum {
+ SEAL_keytype = 1,
+ SRK_keytype = 4
+};
+
+int TSS_authhmac(unsigned char *digest, const unsigned char *key,
+ unsigned int keylen, unsigned char *h1,
+ unsigned char *h2, unsigned int h3, ...);
+int TSS_checkhmac1(unsigned char *buffer,
+ const uint32_t command,
+ const unsigned char *ononce,
+ const unsigned char *key,
+ unsigned int keylen, ...);
+
+int trusted_tpm_send(unsigned char *cmd, size_t buflen);
+int oiap(struct tpm_buf *tb, uint32_t *handle, unsigned char *nonce);
+
+int tpm2_seal_trusted(struct tpm_chip *chip,
+ struct trusted_key_payload *payload,
+ struct trusted_key_options *options);
+int tpm2_unseal_trusted(struct tpm_chip *chip,
+ struct trusted_key_payload *payload,
+ struct trusted_key_options *options);
+
+#define TPM_DEBUG 0
+
+#if TPM_DEBUG
+static inline void dump_options(struct trusted_key_options *o)
+{
+ pr_info("trusted_key: sealing key type %d\n", o->keytype);
+ pr_info("trusted_key: sealing key handle %0X\n", o->keyhandle);
+ pr_info("trusted_key: pcrlock %d\n", o->pcrlock);
+ pr_info("trusted_key: pcrinfo %d\n", o->pcrinfo_len);
+ print_hex_dump(KERN_INFO, "pcrinfo ", DUMP_PREFIX_NONE,
+ 16, 1, o->pcrinfo, o->pcrinfo_len, 0);
+}
+
+static inline void dump_payload(struct trusted_key_payload *p)
+{
+ pr_info("trusted_key: key_len %d\n", p->key_len);
+ print_hex_dump(KERN_INFO, "key ", DUMP_PREFIX_NONE,
+ 16, 1, p->key, p->key_len, 0);
+ pr_info("trusted_key: bloblen %d\n", p->blob_len);
+ print_hex_dump(KERN_INFO, "blob ", DUMP_PREFIX_NONE,
+ 16, 1, p->blob, p->blob_len, 0);
+ pr_info("trusted_key: migratable %d\n", p->migratable);
+}
+
+static inline void dump_sess(struct osapsess *s)
+{
+ print_hex_dump(KERN_INFO, "trusted-key: handle ", DUMP_PREFIX_NONE,
+ 16, 1, &s->handle, 4, 0);
+ pr_info("trusted-key: secret:\n");
+ print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
+ 16, 1, &s->secret, SHA1_DIGEST_SIZE, 0);
+ pr_info("trusted-key: enonce:\n");
+ print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
+ 16, 1, &s->enonce, SHA1_DIGEST_SIZE, 0);
+}
+
+static inline void dump_tpm_buf(unsigned char *buf)
+{
+ int len;
+
+ pr_info("\ntrusted-key: tpm buffer\n");
+ len = LOAD32(buf, TPM_SIZE_OFFSET);
+ print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0);
+}
+#else
+static inline void dump_options(struct trusted_key_options *o)
+{
+}
+
+static inline void dump_payload(struct trusted_key_payload *p)
+{
+}
+
+static inline void dump_sess(struct osapsess *s)
+{
+}
+
+static inline void dump_tpm_buf(unsigned char *buf)
+{
+}
+#endif
+#endif