Class: HasHelpers::ServiceTrust::Verifier

Inherits:
Object
  • Object
show all
Defined in:
lib/has_helpers/service_trust/verifier.rb

Defined Under Namespace

Classes: Result

Constant Summary collapse

REQUIRED_CLAIMS = 
%w[iss aud iat nbf exp jti env].freeze

Class Method Summary collapse

Class Method Details

.verify!(token, expected_audience:, request: nil) ⇒ Object 



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# File 'lib/has_helpers/service_trust/verifier.rb', line 17

def verify!(token, expected_audience:, request: nil)
  header = {}
  payload = {}

  begin
    header, payload = JwtCodec.peek(token)
    validate_untrusted_payload!(header, payload)
    public_key = JwksClient.public_key_for(payload["iss"], header["kid"])
    decoded = JwtCodec.decode!(token, public_key, alg: header["alg"])
    validate_claims!(decoded, expected_audience)
    RateLimiter.check!(decoded["iss"])
    ReplayCache.claim!(decoded["jti"], ttl: decoded["exp"].to_i - Time.current.to_i)
    capabilities = effective_capabilities(decoded)
    Audit.record!(
      payload: decoded,
      header: header,
      outcome: "accepted",
      request: request,
      expected_audience: expected_audience,
      capabilities: capabilities,
      direction: "inbound"
    )
    Result.new(claims: decoded, capabilities: capabilities)
  rescue Error => e
    Audit.record!(
      payload: payload || {},
      header: header || {},
      outcome: "rejected",
      rejection_reason: e.class.name.demodulize,
      request: request,
      expected_audience: expected_audience,
      capabilities: nil,
      direction: "inbound"
    )
    raise
  end
end