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EWF/library/security/jwt/src/jwt_header.e

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note
description: "[
JOSE Header
See https://tools.ietf.org/html/rfc7515
]"
date: "$Date$"
revision: "$Revision$"
class
JWT_HEADER
inherit
ANY
redefine
default_create
end
create
default_create,
make_from_json
convert
string: {READABLE_STRING_8, STRING_8}
feature {NONE} -- Initialization
default_create
do
type := "JWT"
algorithm := "HS256"
end
make_from_json (a_json: READABLE_STRING_8)
do
default_create
import_json (a_json)
end
feature -- Access
type: READABLE_STRING_8
-- Token type (typ) - If present, it is recommended to set this to "JWT".
content_type: detachable READABLE_STRING_8
-- Content type (cty)
-- If nested signing or encryption is employed, it is recommended to set this to JWT,
-- otherwise omit this field.
algorithm: READABLE_STRING_8
-- Message authentication code algorithm (alg)
-- The issuer can freely set an algorithm to verify the signature on the token.
-- However, some supported algorithms are insecure.
feature -- Conversion
string: STRING
do
create Result.make_empty
Result.append ("{%"typ%":%"")
Result.append (type)
Result.append ("%"")
if attached content_type as cty then
Result.append (",%"cty%":%"")
Result.append (cty)
Result.append ("%"")
end
Result.append (",%"alg%":%"")
Result.append (algorithm)
Result.append ("%"}")
end
feature -- Element change
set_type (typ: READABLE_STRING_8)
do
type := typ
end
set_content_type (cty: detachable READABLE_STRING_8)
do
content_type := cty
end
set_algorithm (alg: detachable READABLE_STRING_8)
do
if alg = Void then
algorithm := "none"
else
algorithm := alg
end
end
feature -- Element change
import_json (a_json: READABLE_STRING_8)
local
jp: JSON_PARSER
do
create jp.make_with_string (a_json)
jp.parse_content
if
attached jp.parsed_json_object as jo
then
if attached {JSON_STRING} jo.item ("typ") as j_typ then
set_type (j_typ.unescaped_string_8)
end
if attached {JSON_STRING} jo.item ("cty") as j_cty then
set_content_type (j_cty.unescaped_string_8)
end
if attached {JSON_STRING} jo.item ("alg") as j_alg then
set_algorithm (j_alg.unescaped_string_8)
end
end
end
end