Merge "Fix for the documentation in TimeStampToken.aidl. HMAC computation will always use 1, which is the value of SecurityLevel.TRUSTED_ENVIRONMENT. This is done for backwards compatibility purpose. Test: N/A Bug: None." am: 006bdf3fa9 am: 94131d871b
Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1717931
Change-Id: Ied8b5ca9a7d2ae2d6716c4fa31705fd32dcd6472
diff --git a/security/secureclock/aidl/android/hardware/security/secureclock/TimeStampToken.aidl b/security/secureclock/aidl/android/hardware/security/secureclock/TimeStampToken.aidl
index 2fbd29a..fcf2ee8 100644
--- a/security/secureclock/aidl/android/hardware/security/secureclock/TimeStampToken.aidl
+++ b/security/secureclock/aidl/android/hardware/security/secureclock/TimeStampToken.aidl
@@ -39,7 +39,7 @@
* 32-byte HMAC-SHA256 of the above values, computed as:
*
* HMAC(H,
- * ISecureClock.TIME_STAMP_MAC_LABEL || challenge || timestamp || securityLevel )
+ * ISecureClock.TIME_STAMP_MAC_LABEL || challenge || timestamp || 1 )
*
* where:
*
@@ -50,9 +50,7 @@
* ``||'' represents concatenation
*
* The representation of challenge and timestamp is as 64-bit unsigned integers in big-endian
- * order. SecurityLevel is represented as a 32-bit unsigned integer in big-endian order as
- * described in android.hardware.security.keymint.SecurityLevel. It represents the security
- * level of the secure clock environment.
+ * order. 1, above, is a 32-bit unsigned integer, also big-endian.
*/
byte[] mac;
}