On Fri, 2019-01-04 at 12:58 +0100, Michael Niewöhner wrote: > On Thu, 2019-01-03 at 16:47 +0100, Michael Niewöhner wrote: > > On Thu, 2019-01-03 at 17:04 +0200, Jarkko Sakkinen wrote: > > > On Thu, Jan 03, 2019 at 02:38:11PM +0100, Michael Niewöhner wrote: > > > > On Thu, 2019-01-03 at 15:27 +0200, Jarkko Sakkinen wrote: > > > > > On Sun, Dec 23, 2018 at 12:55:12PM +0100, Michael Niewöhner wrote: > > > > > > There is another issue but I don't know if both are related. Maybe > > > > > > that's > > > > > > just a > > > > > > timing issue... > > > > > > > > > > > > root@debian:~# dd if=/dev/hwrng bs=1 count=1 > > > > > > dd: error reading '/dev/hwrng': Operation not permitted > > > > > > 0+0 records in > > > > > > 0+0 records out > > > > > > 0 bytes copied, 0.755958 s, 0.0 kB/s > > > > > > root@debian:~# dd if=/dev/hwrng bs=1 count=1 | xxd; dd if=/dev/hwrng > > > > > > bs=1 > > > > > > count=1 | xxd > > > > > > dd: error reading '/dev/hwrng': Operation not permitted > > > > > > 0+0 records in > > > > > > 0+0 records out > > > > > > 0 bytes copied, 0.755697 s, 0.0 kB/s > > > > > > 1+0 records in > > > > > > 1+0 records out > > > > > > 00000000: 52 R > > > > > > 1 byte copied, 0.0106268 s, 0.1 kB/s > > > > > > > > > > > > > > > > > > Michael > > > > > > > > > > What does /sys/devices/virtual/misc/hw_random/rng_current show? > > > > > > > > > > Did run commands as a sanity check on my laptop and seem to work. > > > > > > > > > > /Jarkko > > > > > > > > rng_current says "tpm-rng-0", which should be correct > > > > > > Is /dev/tpm0 accessible and usable? > > > > > > /Jarkko > > > > No, it does not seem to work: > > > > root@debian:~# tpm_version > > Tspi_Context_Connect failed: 0x00003011 - layer=tsp, code=0011 (17), > > Communication failure > > root@debian:~# tcsd -f > > TCSD TDDL ioctl: (25) Inappropriate ioctl for device > > TCSD TDDL Falling back to Read/Write device support. > > TCSD TDDL ERROR: write to device /dev/tpm0 failed: Operation not permitted > > TCSD TCS ERROR: TCS GetCapability failed with result = 0x1087 > > root@debian:~# stat /dev/tpm0 > > File: /dev/tpm0 > > Size: 0 Blocks: 0 IO Block: 4096 character special > > file > > Device: 6h/6d Inode: 1114 Links: 1 Device type: a,e0 > > Access: (0600/crw-------) Uid: ( 104/ tss) Gid: ( 112/ tss) > > Access: 2019-01-03 16:39:20.627635333 +0100 > > Modify: 2019-01-03 16:39:20.627635333 +0100 > > Change: 2019-01-03 16:39:20.627635333 +0100 > > Birth: - > > > > Michael > > I have done some more tests with tpm2-tests from > https://github.com/jethrogb/tpm2-utils. > These are my results: > > > (initramfs) ./tpm2-test /dev/tpm0 vendor_tpm_type > Error on write(fd,(char*)&tpm_cmd,sizeof(tpm_cmd)): Operation not permitted > > (initramfs) ./tpm2-test /dev/tpm0 vendor_tpm_type; ./tpm2-test /dev/tpm0 > vendor_ > tpm_type > Error on write(fd,(char*)&tpm_cmd,sizeof(tpm_cmd)): Operation not permitted > � > nitramfs) > > -> Same symptom like with dd if=/dev/tpm.... > > > Trying to read the firmware version: > > (initramfs) (./tpm2-test /dev/tpm0 vendor_string_1; ./tpm2-test /dev/tpm0 > firmwa > re_version_1;) 2>/dev/null | hexdump -C > 00000000 80 01 00 00 00 1b 00 00 00 00 01 00 00 00 06 00 |................| > 00000010 00 00 01 00 00 01 0b 00 01 00 03 |...........| > 0000001b > > (initramfs) (./tpm2-test /dev/tpm0 vendor_string_1; ./tpm2-test /dev/tpm0 > firmwa > re_version_2;) 2>/dev/null | hexdump -C > 00000000 80 01 00 00 00 1b 00 00 00 00 01 00 00 00 06 00 |................| > 00000010 00 00 01 00 00 01 0c 00 02 00 08 |...........| > 0000001b > > -> This version numbers are correct, 1.3.2.8 indeed is the current flashed > firmware. > > > Get the vendor strings: > > (initramfs) (./tpm2-test /dev/tpm0 vendor_string_1; ./tpm2-test /dev/tpm0 > vendor > _string_1;) 2>/dev/null | xxd > 00000000: 8001 0000 001b 0000 0000 0100 0000 0600 ................ > 00000010: 0000 0100 0001 0672 6c73 00 .......rls. > (initramfs) (./tpm2-test /dev/tpm0 vendor_string_1; ./tpm2-test /dev/tpm0 > vendor > _string_2;) 2>/dev/null | xxd > 00000000: 8001 0000 001b 0000 0000 0100 0000 0600 ................ > 00000010: 0000 0100 0001 074e 5043 54 .......NPCT > (initramfs) (./tpm2-test /dev/tpm0 vendor_string_1; ./tpm2-test /dev/tpm0 > vendor > _string_3;) 2>/dev/null | xxd > 00000000: 8001 0000 001b 0000 0000 0100 0000 0600 ................ > 00000010: 0000 0100 0001 0820 0000 00 ....... ... > (initramfs) (./tpm2-test /dev/tpm0 vendor_string_1; ./tpm2-test /dev/tpm0 > vendor > _string_4;) 2>/dev/null | xxd > 00000000: 8001 0000 001b 0000 0000 0100 0000 0600 ................ > 00000010: 0000 0100 0001 0920 0000 00 ....... ... > > Well, NPCT is correct... > > > > Michael Oh damn. I wasn not aware that trousers/tcsd does only support TPM<=1.2. Instead of trousers I now tested tpm2-tools and tss2. Guess what? Same symptoms... This is definitely some sort of timing issue... root@debian:~# tpm2_nvlist ERROR:tcti:src/util/io.c:102:write_all() failed to write to fd 3: Operation not permitted ERROR:tcti:src/tss2-tcti/tcti-device.c:86:tcti_device_transmit() wrong number of bytes written. Expected 22, wrote 0. ERROR: GetCapability:Get NV Index list Error. TPM Error:0xa000a ERROR: Unable to run tpm2_nvlist root@debian:~# tpm2_nvlist; tpm2_nvlist ERROR:tcti:src/util/io.c:102:write_all() failed to write to fd 3: Operation not permitted ERROR:tcti:src/tss2-tcti/tcti-device.c:86:tcti_device_transmit() wrong number of bytes written. Expected 22, wrote 0. ERROR: GetCapability:Get NV Index list Error. TPM Error:0xa000a ERROR: Unable to run tpm2_nvlist 0x1800001: hash algorithm: friendly: sha256 value: 0xB attributes: friendly: authwrite|policydelete|writelocked|writedefine|authread|no_da|written|platformcr eate value: 0x42C0462 size: 70 ........ root@debian:~# tpm2_pcrlist ERROR:tcti:src/util/io.c:102:write_all() failed to write to fd 3: Operation not permitted ERROR:tcti:src/tss2-tcti/tcti-device.c:86:tcti_device_transmit() wrong number of bytes written. Expected 22, wrote 0. ERROR: GetCapability: Get PCR allocation status Error. TPM Error:0xa000a...... ERROR: Unable to run tpm2_pcrlist root@debian:~# tpm2_pcrlist; tpm2_pcrlist sha1 : 0 : 1ebb2be3b7103a09b5caeeb5827c1242cd6632ec 1 : 425e833da73cb511150d6ffcf6fac64e9a6feb58 2 : b2a83b0ebf2f8374299a5b2bdfc31ea955ad7236 3 : b2a83b0ebf2f8374299a5b2bdfc31ea955ad7236 4 : d13c141b174afbb568773adf1f39940a2df47c7d 5 : 756a3647403ab141ec2c1ac7325854f4a93f6efd ...... Michael
