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modulemanager: Add plugin load filter that reads module metadata from source Metadata in modules is added using lines formatted as: --% key: value Where key is a valid identifier string, and value is also a string (leading and trailing whitespace are trimmed during parsing). The initial supported keys are: --% requires_core_features: feature1, feature2, ... --% conflicts_core_features: feature1, feature2. ... These 'features' map to features reported by the new core.features module. A benefit of this load-time metadata approach compared to e.g. something like module:requires()/module:conflicts() is that we can continue to look in module search paths for a suitable module. Aborting an already-loaded module due to a version conflict would be too late.

local type hash = function (msg : string, hex : boolean) : string
local type hmac = function (key : string, msg : string, hex : boolean) : string
local type kdf = function (pass : string, salt : string, i : integer) : string

local record lib
	sha1 : hash
	sha256 : hash
	sha224 : hash
	sha384 : hash
	sha512 : hash
	md5 : hash
	hmac_sha1 : hmac
	hmac_sha256 : hmac
	hmac_sha512 : hmac
	hmac_md5 : hmac
	scram_Hi_sha1 : kdf
	pbkdf2_hmac_sha1 : kdf
	pbkdf2_hmac_sha256 : kdf
	equals : function (string, string) : boolean
	version : string
	_LIBCRYPTO_VERSION : string
end
return lib