3 files changed, 79 insertions, 21 deletions

diff --git a/include/keys/trusted-type.h b/include/keys/trusted-type.h
index a94c03a61d8f..d89fa2579ac0 100644
--- a/include/keys/trusted-type.h
+++ b/include/keys/trusted-type.h
@@ -11,6 +11,12 @@
 #include <linux/rcupdate.h>
 #include <linux/tpm.h>
 
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) "trusted_key: " fmt
+
 #define MIN_KEY_SIZE			32
 #define MAX_KEY_SIZE			128
 #define MAX_BLOB_SIZE			512
@@ -22,6 +28,7 @@ struct trusted_key_payload {
 	unsigned int key_len;
 	unsigned int blob_len;
 	unsigned char migratable;
+	unsigned char old_format;
 	unsigned char key[MAX_KEY_SIZE + 1];
 	unsigned char blob[MAX_BLOB_SIZE];
 };
@@ -30,6 +37,7 @@ struct trusted_key_options {
 	uint16_t keytype;
 	uint32_t keyhandle;
 	unsigned char keyauth[TPM_DIGEST_SIZE];
+	uint32_t blobauth_len;
 	unsigned char blobauth[TPM_DIGEST_SIZE];
 	uint32_t pcrinfo_len;
 	unsigned char pcrinfo[MAX_PCRINFO_SIZE];
@@ -40,6 +48,53 @@ struct trusted_key_options {
 	uint32_t policyhandle;
 };
 
+struct trusted_key_ops {
+	/*
+	 * flag to indicate if trusted key implementation supports migration
+	 * or not.
+	 */
+	unsigned char migratable;
+
+	/* Initialize key interface. */
+	int (*init)(void);
+
+	/* Seal a key. */
+	int (*seal)(struct trusted_key_payload *p, char *datablob);
+
+	/* Unseal a key. */
+	int (*unseal)(struct trusted_key_payload *p, char *datablob);
+
+	/* Get a randomized key. */
+	int (*get_random)(unsigned char *key, size_t key_len);
+
+	/* Exit key interface. */
+	void (*exit)(void);
+};
+
+struct trusted_key_source {
+	char *name;
+	struct trusted_key_ops *ops;
+};
+
 extern struct key_type key_type_trusted;
 
+#define TRUSTED_DEBUG 0
+
+#if TRUSTED_DEBUG
+static inline void dump_payload(struct trusted_key_payload *p)
+{
+	pr_info("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("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("migratable %d\n", p->migratable);
+}
+#else
+static inline void dump_payload(struct trusted_key_payload *p)
+{
+}
+#endif
+
 #endif /* _KEYS_TRUSTED_TYPE_H */
diff --git a/include/keys/trusted_tee.h b/include/keys/trusted_tee.h
new file mode 100644
index 000000000000..151be25a979e
--- /dev/null
+++ b/include/keys/trusted_tee.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019-2021 Linaro Ltd.
+ *
+ * Author:
+ * Sumit Garg <sumit.garg@linaro.org>
+ */
+
+#ifndef __TEE_TRUSTED_KEY_H
+#define __TEE_TRUSTED_KEY_H
+
+#include <keys/trusted-type.h>
+
+extern struct trusted_key_ops trusted_key_tee_ops;
+
+#endif
diff --git a/include/keys/trusted_tpm.h b/include/keys/trusted_tpm.h
index a56d8e1298f2..7769b726863a 100644
--- a/include/keys/trusted_tpm.h
+++ b/include/keys/trusted_tpm.h
@@ -16,6 +16,8 @@
 #define LOAD32N(buffer, offset)	(*(uint32_t *)&buffer[offset])
 #define LOAD16(buffer, offset)	(ntohs(*(uint16_t *)&buffer[offset]))
 
+extern struct trusted_key_ops trusted_key_tpm_ops;
+
 struct osapsess {
 	uint32_t handle;
 	unsigned char secret[SHA1_DIGEST_SIZE];
@@ -52,30 +54,19 @@ int tpm2_unseal_trusted(struct tpm_chip *chip,
 #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);
+	pr_info("sealing key type %d\n", o->keytype);
+	pr_info("sealing key handle %0X\n", o->keyhandle);
+	pr_info("pcrlock %d\n", o->pcrlock);
+	pr_info("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");
+	pr_info("secret:\n");
 	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE,
 		       16, 1, &s->secret, SHA1_DIGEST_SIZE, 0);
 	pr_info("trusted-key: enonce:\n");
@@ -87,7 +78,7 @@ static inline void dump_tpm_buf(unsigned char *buf)
 {
 	int len;
 
-	pr_info("\ntrusted-key: tpm buffer\n");
+	pr_info("\ntpm buffer\n");
 	len = LOAD32(buf, TPM_SIZE_OFFSET);
 	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, buf, len, 0);
 }
@@ -96,10 +87,6 @@ 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)
 {
 }