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avb: add support for named persistent values

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AVB 2.0 spec. revision 1.1 introduces support for named persistent values
that must be tamper evident and allows AVB to store arbitrary key-value
pairs [1].

Introduce implementation of two additional AVB operations
read_persistent_value()/write_persistent_value() for retrieving/storing
named persistent values.

Correspondent pull request in the OP-TEE OS project repo [2].

[1]: https://android.googlesource.com/platform/external/avb/+/android-9.0.0_r22
[2]: https://github.com/OP-TEE/optee_os/pull/2699

Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com>
This commit is contained in:
Igor Opaniuk 2019-04-09 15:38:14 +02:00 • committed by Tom Rini
parent b85d155199
commit fc1fe01b08
7 changed files with 351 additions and 22 deletions
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16
test/py/tests/test_avb.py
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@ -116,3 +116,19 @@ def test_avb_mmc_read(u_boot_console):
response = u_boot_console.run_command('cmp 0x%x 0x%x 40' %
(temp_addr, temp_addr2))
assert response.find('64 word')
@pytest.mark.buildconfigspec('cmd_avb')
@pytest.mark.buildconfigspec('optee_ta_avb')
def test_avb_persistent_values(u_boot_console):
"""Test reading/writing persistent storage to avb
"""
response = u_boot_console.run_command('avb init %s' % str(mmc_dev))
assert response == ''
response = u_boot_console.run_command('avb write_pvalue test value_value')
assert response == 'Wrote 12 bytes'
response = u_boot_console.run_command('avb read_pvalue test 12')
assert response == 'Read 12 bytes, value = value_value'