c# - Setting MachineKey via app settings -


we have .net 4.5.x oss application deploying azure websites using git deploy. have build server commits artifacts git repo , use git deploy. use app settings in azure control everything. however, i'm running roadblocks finding way set machine key via app settings / environmental variables. else run issue , solve it?

p.s., seems thing uses machinekey in our app signalr... wonder if there safe , secure way replace iprotectdata without using machine key generate tokens.

like wanted able set machine keys not commit them web.config goes source control , becomes security risk, , able use same per-environment config system use appsettings. did find solution this, though it's bit ugly uses reflection manipulate machinekeysection configuration. 

var getter = typeof(machinekeysection).getmethod("getapplicationconfig", bindingflags.static | bindingflags.nonpublic); var config = (machinekeysection)getter.invoke(null, array.empty<object>());  var readonlyfield = typeof(configurationelement).getfield("_breadonly", bindingflags.instance | bindingflags.nonpublic); readonlyfield.setvalue(config, false);  config.decryptionkey = mykeys.encryptionkey; config.validationkey = mykeys.validationkey;  readonlyfield.setvalue(config, true);

i wanted able to, if @ possible, extract , use current machine keys on production server, not have forcibly log off our logged in users. ended doing similar this answer, uses reflection.

full solution: https://gist.github.com/cmcnab/d2bbed02eb429098ed3656a0729ee40a


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