Hi, I am writing a secure application that makes heavy use of hardware-backed android keystore. Unsurprisingly, performance is of concern and I'd like to optimize the application where possible. The issue I am facing is whenever I am interfacing with android keystore, I get A LOT of log messages in logcat. Such as:
*08-08 15:48:13.640 3007 3007 W keymaster_mdfpp: entered get_key_characteristics function.* *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_qualcomm.c:221) trustlet returned for command 9, err 0* *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:112) *******hw_enforced********** *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:36) *********print_params************ *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:37) params->length = 6 * *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:43) tc_KM_TAG_KEY_SIZE params->params[0].tag = 0x30000003 * *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:60) tc_KM_UINT 256 0x00000100* *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:43) tc_KM_TAG_ALGORITHM params->params[1].tag = 0x10000002 * *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:48) tc_KM_ENUM 3 0x00000003* *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:43) tc_KM_TAG_PURPOSE params->params[2].tag = 0x20000001 * *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:52) tc_KM_ENUM_REP 2 0x00000002* *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:43) tc_KM_TAG_DIGEST params->params[3].tag = 0x20000005 * *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:52) tc_KM_ENUM_REP 4 0x00000004* *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:43) tc_KM_TAG_ORIGIN params->params[4].tag = 0x100002be * *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:48) tc_KM_ENUM 0 0x00000000* *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:43) tc_KM_TAG_CREATION_DATETIME params->params[5].tag = 0x600002bd * *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:87) tc_KM_DATE 0* *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:107) ************************************** *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:114) *******sw_enforced********** *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:36) *********print_params************ *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:37) params->length = 1 * *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:43) tc_KM_TAG_NO_AUTH_REQUIRED params->params[0].tag = 0x700001f7 * *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:56) tc_KM_BOOL 1 0x00000001* *08-08 15:48:13.640 3007 3007 D keymaster_tee: [DEBUG]: (nwd_keymaster_packing.c:107) ************************************** Is there a way to disable this logging by android keystore? I can't find an answer anywhere and this IO is unnecessary IMO. -- *This message (including any attachments) may contain confidential, proprietary, privileged and/or private information. The information is intended to be for the use of the individual or entity designated above. If you are not the intended recipient of this message, please notify the sender immediately, and delete the message and any attachments. Any disclosure, reproduction, distribution or other use of this message or any attachments by an individual or entity other than the intended recipient is prohibited.* -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. To post to this group, send email to android-developers@googlegroups.com. Visit this group at https://groups.google.com/group/android-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/android-developers/9490e91a-c8ff-407f-b137-d50e0cd81588%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
