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Author SHA1 Message Date
Heinrich Schuchardt
4961ceefbf tools: efivar.py unused variable 
Unused variables should be called '_'.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
 2021-01-13 02:38:00 +01:00
Heinrich Schuchardt
33abdb9836 tools: efivar.py should check GUID when deleting 
When deleting a variable we must check that the GUID provided by the
user matches the GUID of the variable.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
 2021-01-13 02:38:00 +01:00
Heinrich Schuchardt
45c0792c02 tools: efivar.py: incorrect indentation 
According to https://pep8.org/#indentation we should use 4 spaces per
indentation level.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
 2021-01-13 02:38:00 +01:00
Heinrich Schuchardt
4f6ec7754b tools: efivar.py without arguments 
When tools: efivar.py is called without arguments an error occurs:

Traceback (most recent call last):
  File "tools/efivar.py", line 380, in <module>
    main()
  File "tools/efivar.py", line 360, in main
    args.func(args)
AttributeError: 'Namespace' object has no attribute 'func'

Show the online help if the arguments do not specify a function.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
 2021-01-13 02:38:00 +01:00
Paulo Alcantara
73253d7765 tools: add a simple script to generate EFI variables 
This script generates EFI variables for U-Boot variable store format.

A few examples:

  - Generating secure boot keys

    $ openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_PK/ \
            -keyout PK.key -out PK.crt -nodes -days 365
    $ efisiglist -a -c PK.crt -o foo.esl
    $ tools/efivar.py set -i ubootefi.var -n db -d foo.esl -t file
    $ tools/efivar.py set -i ubootefi.var -n kek -d foo.esl -t file
    $ tools/efivar.py set -i ubootefi.var -n pk -d foo.esl -t file

  - Printing out variables

    $ tools/efivar.py set -i ubootefi.var -n var1 -d foo -t str
    $ tools/efivar.py set -i ubootefi.var -n var2 -d bar -t str
    $ tools/efivar.py print -i ubootefi.var
    var1:
        8be4df61-93ca-11d2-aa0d-00e098032b8c EFI_GLOBAL_VARIABLE_GUID
        NV|BS|RT, DataSize = 0x3
        0000000000: 66 6F 6F                                          foo
    var2:
        8be4df61-93ca-11d2-aa0d-00e098032b8c EFI_GLOBAL_VARIABLE_GUID
        NV|BS|RT, DataSize = 0x3
        0000000000: 62 61 72                                          bar

    - Removing variables

      $ tools/efivar.py del -i ubootefi.var -n var1
      $ tools/efivar.py set -i ubootefi.var -n var1 -a nv,bs -d foo -t str
      $ tools/efivar.py print -i ubootefi.var -n var1
      var1:
          8be4df61-93ca-11d2-aa0d-00e098032b8c EFI_GLOBAL_VARIABLE_GUID
          NV|BS, DataSize = 0x3
          0000000000: 66 6F 6F                                        foo
      $ tools/efivar.py del -i ubootefi.var -n var1
      err: attributes don't match
      $ tools/efivar.py del -i ubootefi.var -n var1 -a nv,bs
      $ tools/efivar.py print -i ubootefi.var -n var1
      err: variable not found

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>

Correct examples in commit message.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
 2020-12-20 17:40:06 +01:00