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# frozen_string_literal: true
module Gitlab
module APIAuthentication
class TokenResolver
include ActiveModel::Validations
attr_reader :token_type
validates :token_type, inclusion: {
in: %i[
personal_access_token_with_username
job_token_with_username
deploy_token_with_username
personal_access_token
job_token
deploy_token
]
}
def initialize(token_type)
@token_type = token_type
validate!
end
# Existing behavior is known to be inconsistent across authentication
# methods with regards to whether to silently ignore present but invalid
# credentials or to raise an error/respond with 401.
#
# If a token can be located from the provided credentials, but the token
# or credentials are in some way invalid, this implementation opts to
# raise an error.
#
# For example, if the raw credentials include a username and password, and
# a token is resolved from the password, but the username does not match
# the token, an error will be raised.
#
# See https://gitlab.com/gitlab-org/gitlab/-/issues/246569
def resolve(raw)
case @token_type
when :personal_access_token
resolve_personal_access_token raw
when :job_token
resolve_job_token raw
when :deploy_token
resolve_deploy_token raw
when :personal_access_token_with_username
resolve_personal_access_token_with_username raw
when :job_token_with_username
resolve_job_token_with_username raw
when :deploy_token_with_username
resolve_deploy_token_with_username raw
end
end
private
def resolve_personal_access_token_with_username(raw)
raise ::Gitlab::Auth::UnauthorizedError unless raw.username
with_personal_access_token(raw) do |pat|
break unless pat
# Ensure that the username matches the token. This check is a subtle
# departure from the existing behavior of #find_personal_access_token_from_http_basic_auth.
# https://gitlab.com/gitlab-org/gitlab/-/merge_requests/38627#note_435907856
raise ::Gitlab::Auth::UnauthorizedError unless pat.user.username == raw.username
pat
end
end
def resolve_job_token_with_username(raw)
# Only look for a job if the username is correct
return if ::Gitlab::Auth::CI_JOB_USER != raw.username
with_job_token(raw) do |job|
job
end
end
def resolve_deploy_token_with_username(raw)
with_deploy_token(raw) do |token|
break unless token
# Ensure that the username matches the token. This check is a subtle
# departure from the existing behavior of #deploy_token_from_request.
# https://gitlab.com/gitlab-org/gitlab/-/merge_requests/38627#note_474826205
raise ::Gitlab::Auth::UnauthorizedError unless token.username == raw.username
token
end
end
def resolve_personal_access_token(raw)
with_personal_access_token(raw) do |pat|
pat
end
end
def resolve_job_token(raw)
with_job_token(raw) do |job|
job
end
end
def resolve_deploy_token(raw)
with_deploy_token(raw) do |token|
token
end
end
def with_personal_access_token(raw, &block)
pat = ::PersonalAccessToken.find_by_token(raw.password)
return unless pat
yield(pat)
end
def with_deploy_token(raw, &block)
token = ::DeployToken.active.find_by_token(raw.password)
return unless token
yield(token)
end
def with_job_token(raw, &block)
job = ::Ci::AuthJobFinder.new(token: raw.password).execute
raise ::Gitlab::Auth::UnauthorizedError unless job
yield(job)
end
end
end
end
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