commit ba765a66c1a2e1d08a6bbbc7d847a175c1ad9fa4
author Qi Wu <siofive@google.com> Tue Jan 05 20:14:56 2021 +0800
committer Qi Wu <siofive@google.com> Wed Jan 13 22:37:19 2021 +0800
tree 00096765946aeeed1b8e625b5f50aea7cd4b3c2b
parent 29ae34bcde8608bd3c7e572f0c1cd9f678fb0df9

Add limited use key tag defination.

Test: none
Change-Id: I5464f6411b8bce94a3736cd033d064e75d313fe1

include/hardware/keymaster_defs.h

diff --git a/include/hardware/keymaster_defs.h b/include/hardware/keymaster_defs.h
index f2deb72..ab614d5 100644
--- a/include/hardware/keymaster_defs.h
+++ b/include/hardware/keymaster_defs.h
@@ -95,6 +95,8 @@
                                                            cryptographic operations with the key. */
     KM_TAG_MAX_USES_PER_BOOT = KM_UINT | 404,           /* Number of times the key can be used per
                                                            boot. */
+    KM_TAG_USAGE_COUNT_LIMIT = KM_UINT | 405,           /* Number of cryptographic operations left
+                                                           with the key.*/
 
     /* User authentication */
     KM_TAG_ALL_USERS = KM_BOOL | 500,           /* Reserved for future use -- ignore */