libdcp/src/encrypted_kdm.cc, branch backport

Slightly hacky but hopefully functional fix for KDMs after the changes

2019-01-24T17:34:37Z

to signer. The KDM stuff uses add_signature_value() but not sign() since it has to allow pass-through of a KDM (so it handles etc. itself). This means we have to make the indentation-adding optional. It might have been nicer to make indent() not add indentation if it's not already there.

Attempt to fix Sony digest validation by indenting the

2019-01-24T02:03:05Z

and before signing. This is in the belief that, perhaps, the Sony software "reformats" the XML before checking that the signature is correct (or something).

Take thumbprint rather than a full dcp::Certificate for trusted devices.

2018-11-08T23:56:52Z

Use a bool instead of an int for disable-forensic-picture and

2018-02-14T22:16:07Z

a optional instead of an int with a magic -1 for disable-forensic-audio.

Add parsing of ForensicMarkFlagList in KDMRequiredExtensions constructor.

2018-02-14T22:16:07Z

Fix indentation.

2018-02-14T22:16:07Z

Make disabling forensic marking optional.

2018-02-14T22:16:07Z

Make an encrypted KDM's id publicly available.

2018-02-14T22:16:07Z

Add the "Multiple Modified Transitional 1" KDM formulation.

2018-02-14T22:16:07Z

Better exception when loading a KDM fails.

2017-05-24T11:47:36Z