[PATCH 0/3] crypto: add JSON Web Token (JWT) support

Ahmad Fatoum a.fatoum at pengutronix.de
Mon Oct 23 07:31:20 PDT 2023

JSON Web Token is a proposed Internet standard for creating tokens with
optional signature and/or optional encryption whose payload holds JSON that
asserts some number of claims. The tokens are signed either using a private
secret or a public/private key.

In the context of barebox, a JSON Web Token can be used as unlock token
for a system: By default, the system would be locked and only boot
signed payloads, but when a valid unlock token is provided, board code
can selectively allow access to disallowed features, such as booting
unsigned payloads or provide access to the console and shell.

This series adds first support for JSON Web Tokens on top of the already
existing JSON support. RS256 is the only currently supported format, but
more may be added in future. In lieu of upstreaming board code making
use of this, a selftest is added that decodes a JSON Web token after
verifying it and asserts that the claim contained inside are as expected.

Ahmad Fatoum (3):
  lib: base64: add support for base64url
  crypto: add JSON Web Token (JWT) support
  test: self: add JSON Web Token tests

 crypto/Kconfig                   |   6 +
 crypto/Makefile                  |   2 +
 crypto/jwt.c                     | 241 +++++++++++++++++++++++++++++++
 include/base64.h                 |   1 +
 include/crypto/jwt.h             |  55 +++++++
 lib/base64.c                     |  60 +++++++-
 test/self/Kconfig                |   7 +
 test/self/Makefile               |  11 +-
 test/self/jwt.c                  | 157 ++++++++++++++++++++
 test/self/jwt_test.pem           |  37 +++++
 test/self/jwt_test.pem.c_shipped |  49 +++++++
 11 files changed, 620 insertions(+), 6 deletions(-)
 create mode 100644 crypto/jwt.c
 create mode 100644 include/crypto/jwt.h
 create mode 100644 test/self/jwt.c
 create mode 100644 test/self/jwt_test.pem
 create mode 100644 test/self/jwt_test.pem.c_shipped


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