[PATCH v2 0/6] ssh signing: verify key lifetime

This series adds key lifetime validity checks by parsing commit/tag dates from the paylod and passing them to the ssh-keygen operations.

changes since v1:
 - struct signature_check is now used to input payload data into
   check_function
 - payload metadata parsing is completely internal to check_signature.
   the caller only need to set the payload type in the sigc struct
 - small nits and readability fixes
 - removed payload_signer parameter. since we now use the struct we can extend
   this later.

Since the last 3 patches now only contain a minimal code change and the tests for the seperate callers we could merge them together. I don't mind either way.

Fabian Stelzer (6):
  ssh signing: use sigc struct to pass payload
  ssh signing: add key lifetime test prereqs
  ssh signing: make verify-commit consider key lifetime
  ssh signing: make git log verify key lifetime
  ssh signing: make verify-tag consider key lifetime
  ssh signing: make fmt-merge-msg consider key lifetime

 Documentation/config/gpg.txt     |  5 ++
 builtin/receive-pack.c           |  6 ++-
 commit.c                         |  6 ++-
 fmt-merge-msg.c                  |  5 +-
 gpg-interface.c                  | 87 ++++++++++++++++++++++++--------
 gpg-interface.h                  | 15 ++++--
 log-tree.c                       | 10 ++--
 t/lib-gpg.sh                     | 19 ++++++-
 t/t4202-log.sh                   | 43 ++++++++++++++++
 t/t6200-fmt-merge-msg.sh         | 54 ++++++++++++++++++++
 t/t7031-verify-tag-signed-ssh.sh | 42 +++++++++++++++
 t/t7528-signed-commit-ssh.sh     | 42 +++++++++++++++
 tag.c                            |  5 +-
 13 files changed, 303 insertions(+), 36 deletions(-)

base-commit: e9e5ba39a78c8f5057262d49e261b42a8660d5b9