u-boot.git/tools/efivar.py, branch master

tools: efivar.py unused variable

2021-01-13T01:38:00+00:00

Unused variables should be called '_'.

Signed-off-by: Heinrich Schuchardt 
Reviewed-by: Paulo Alcantara (SUSE)

tools: efivar.py should check GUID when deleting

2021-01-13T01:38:00+00:00

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 
Reviewed-by: Paulo Alcantara (SUSE)

tools: efivar.py: incorrect indentation

2021-01-13T01:38:00+00:00

According to https://pep8.org/#indentation we should use 4 spaces per
indentation level.

Signed-off-by: Heinrich Schuchardt 
Reviewed-by: Paulo Alcantara (SUSE)

tools: efivar.py without arguments

2021-01-13T01:38:00+00:00

When tools: efivar.py is called without arguments an error occurs:

Traceback (most recent call last):
  File "tools/efivar.py", line 380, in 
    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 
Reviewed-by: Paulo Alcantara (SUSE)

tools: add a simple script to generate EFI variables

2020-12-20T16:40:06+00:00

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) 

Correct examples in commit message.
Signed-off-by: Heinrich Schuchardt