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Commit 94131d87 authored by Treehugger Robot's avatar Treehugger Robot Committed by Automerger Merge Worker
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Merge "Fix for the documentation in TimeStampToken.aidl. HMAC computation will... 

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: 006bdf3f

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1717931

Change-Id: I25112411c12a7715a6403d3b40cad6c161ac7ef9
parents 302b92e7 006bdf3f

security/secureclock/aidl/android/hardware/security/secureclock/TimeStampToken.aidl

+2 −4
Original line number Diff line number Diff line
@@ -39,7 +39,7 @@ parcelable TimeStampToken { 
     * 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 @@ parcelable TimeStampToken { 
     *   ``||'' 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;

}