8000 Updater signature validation - format incompatible w/RFC8017 by qistoph · Pull Request #6250 · esp8266/Arduino · GitHub
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Updater signature validation - format incompatible w/RFC8017 #6250

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Merged
merged 4 commits into from
Jul 4, 2019
Merged

Updater signature validation - format incompatible w/RFC8017 #6250

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a3a5e66
Add hash OID to signature verification (#6201)
qistoph Jun 14, 2019
d56bf19
Add legacy signing option
qistoph Jun 22, 2019
86a2db2
Describe and use the legacy option of signing.py
qistoph Jun 22, 2019
3012e08
Merge branch 'master' into pkcs1_fix
d-a-v Jul 4, 2019
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Describe and use the legacy option of signing.py
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@qistoph
qistoph committed Jul 3, 2019
commit 86a2db28319f09e2a27e15e983f6426ddaa0011f
12 changes: 12 additions & 0 deletions doc/ota_updates/readme.rst
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Expand Up @@ -125,6 +125,18 @@ Compile the sketch normally and, once a `.bin` file is available, sign it using

<ESP8266ArduioPath>/tools/signing.py --mode sign --privatekey <path-to-private.key> --bin <path-to-unsigned-bin> --out <path-to-signed-binary>

Old And New Signature Formats
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Up to version 2.5.2 of the core, the format of signatures was a little different. An additional signed binary with the extension legacy_sig is created. This file contains a signature in the old format and can be uploaded OTA to a device that checks for the old signature format.

To create a legacy signature, call the signing script with --legacy:

.. code:: bash

<ESP8266ArduioPath>/tools/signing.py --mode sign --privatekey <path-to-private.key> --bin <path-to-unsigned-bin> --out <path-to-signed-binary> --legacy <path-to-legacy-file>


Safety
~~~~~~

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2 changes: 1 addition & 1 deletion platform.txt
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Expand Up @@ -109,7 +109,7 @@ recipe.objcopy.eep.pattern=

## Create hex
recipe.objcopy.hex.1.pattern="{runtime.tools.python.path}/python" "{runtime.tools.elf2bin}" --eboot "{runtime.tools.eboot}" --app "{build.path}/{build.project_name}.elf" --flash_mode {build.flash_mode} --flash_freq {build.flash_freq} --flash_size {build.flash_size} --path "{runtime.tools.xtensa-lx106-elf-gcc.path}/bin" --out "{build.path}/{build.project_name}.bin"
recipe.objcopy.hex.2.pattern="{runtime.tools.python.path}/python" "{runtime.tools.signing}" --mode sign --privatekey "{build.source.path}/private.key" --bin "{build.path}/{build.project_name}.bin" --out "{build.path}/{build.project_name}.bin.signed"
recipe.objcopy.hex.2.pattern="{runtime.tools.python.path}/python" "{runtime.tools.signing}" --mode sign --privatekey "{build.source.path}/private.key" --bin "{build.path}/{build.project_name}.bin" --out "{build.path}/{build.project_name}.bin.signed" --legacy "{build.path}/{build.project_name}.bin.legacy_sig"

## Save hex
recipe.output.tmp_file={build.project_name}.bin
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