Class: Saro::Dat::DatManager

Inherits:
Object
  • Object
show all
Defined in:
lib/saro/dat/dat_manager.rb

Defined Under Namespace

Classes: State

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ DatManager

Returns a new instance of DatManager.



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# File 'lib/saro/dat/dat_manager.rb', line 21

def initialize
  @state = EMPTY_STATE
  @write_lock = Mutex.new
end

Class Method Details

._issue(cert, plain, secure) ⇒ Object

NOTE: 아래 private 는 def self. 메서드에 적용되지 않는다. _issue/_parse 는 예전부터 실제로는 public 이었고 테스트·벤치가 그렇게 쓰고 있다. 오해를 없애려 위치를 옮기고, 정말 감춰야 하는 것만 private_class_method 로 막는다.



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# File 'lib/saro/dat/dat_manager.rb', line 155

def self._issue(cert, plain, secure)
  now = Time.now.to_i
  expire = now + cert.dat_ttl_seconds
  cid_hex = cert.cid.to_s(16)

  plain_b64 = Saro::Dat::Util.encode_base64_url_str(plain)

  encrypted_secure = cert.crypto_key.encrypt(secure)
  secure_b64 = Saro::Dat::Util.encode_base64_url_str(encrypted_secure)

  body = "#{expire}.#{cid_hex}.#{plain_b64}.#{secure_b64}"
  signature = Saro::Dat::Util.encode_base64_url_str(cert.signature_key.sign(body))

  "#{body}.#{signature}"
end

._parse(cert, dat_input) ⇒ Object

Raises:



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# File 'lib/saro/dat/dat_manager.rb', line 171

def self._parse(cert, dat_input)
  dat = Saro::Dat::Dat.from_value(dat_input)
  # 같은 조건이 여기서는 RuntimeError, DatManager#parse 에서는 ArgumentError
  # 였다. 이제 양쪽 모두 같은 코드를 던진다.
  dat.raise_if_invalid!
  raise Saro::Dat::Error.new(Saro::Dat::ErrorCode::TOKEN_EXPIRED) if dat.expired?

  # verify 는 불일치일 때만 false 를 준다. 연산 실패는 SIG_BACKEND 로 올라온다.
  unless cert.signature_key.verify(dat.body_string, dat.signature)
    raise Saro::Dat::Error.new(Saro::Dat::ErrorCode::SIG_MISMATCH)
  end

  decrypted_secure = cert.crypto_key.decrypt(dat.secure)
  Saro::Dat::DatPayload.new(dat.plain, decrypted_secure)
end

Instance Method Details

#exports(verify_only = false) ⇒ Object 



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# File 'lib/saro/dat/dat_manager.rb', line 82

def exports(verify_only = false)
  @state.certificates.map { |cert| cert.exports(verify_only) }.join("\n")
end

#import_certificates(input_certs, clear: false) ⇒ Object 



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# File 'lib/saro/dat/dat_manager.rb', line 26

def import_certificates(input_certs, clear: false)
  # rust returns early on an empty input without touching the state, so an
  # empty CMS response can never wipe the certificates held by a manager
  # that is importing with clear: true.
  return 0 if input_certs.nil? || input_certs.empty?

  # Duplicate detection runs before any mutation (rust checks the whole
  # input up front), so a bad payload cannot leave a half-applied state.
  seen_cids = Set.new
  input_certs.each do |cert|
    if seen_cids.include?(cert.cid)
      raise Saro::Dat::Error.new(Saro::Dat::ErrorCode::CERT_DUPLICATE_CID, "duplicate cid #{cert.cid.to_s(16)}")
    end
    seen_cids.add(cert.cid)
  end

  renew_count = 0
  @write_lock.synchronize do
    certificates = clear ? [] : @state.certificates.dup

    cids = Set.new(certificates.map(&:cid))

    input_certs.each do |cert|
      next if cids.include?(cert.cid)

      cids.add(cert.cid)
      certificates << cert
      renew_count += 1
    end

    # Expired certificates are dropped from the *merged* list, not just
    # from the incoming one, so a renewal sweeps out what has aged out.
    certificates.reject!(&:expired)
    certificates.sort_by!(&:dat_issuance_end_seconds)

    # Find latest issuable certificate as issuer
    issuer = certificates.reverse_each.find(&:issuable)

    by_cid = {}
    certificates.each { |cert| by_cid[cert.cid] = cert }

    @state = State.new(issuer, certificates.freeze, by_cid.freeze).freeze
  end
  renew_count
end

#imports(format_str, clear: false) ⇒ Object 



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# File 'lib/saro/dat/dat_manager.rb', line 72

def imports(format_str, clear: false)
  certs = []
  format_str.strip.split("\n").each do |line|
    line = line.strip
    next if line.empty?
    certs << Saro::Dat::DatCertificate.imports(line)
  end
  import_certificates(certs, clear: clear)
end

#issue(plain, secure) ⇒ Object 



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# File 'lib/saro/dat/dat_manager.rb', line 86

def issue(plain, secure)
  state = @state
  issuer = state.issuer
  unless issuer
    # 예전에는 이 다섯 가지가 "Invalid DAT: Signing Key Does Not Exist"
    # 문자열 하나였다. 대응이 전부 다르다 — 발급창 전이면 기다리면 되고,
    # verify-only 뿐이면 배포 설정 실수이며, 0건이면 CMS 접속 문제다.
    raise Saro::Dat::Error.new(Saro::Dat::ErrorCode::MANAGER_NO_CERTIFICATE) if state.certificates.empty?
    raise Saro::Dat::Error.new(
      Saro::Dat::ErrorCode::MANAGER_NO_ISSUABLE_CERTIFICATE,
      cause: no_issuable_cause(state.certificates)
    )
  end

  self.class._issue(issuer, plain, secure)
end

#parse(dat_input) ⇒ Object

Raises:



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# File 'lib/saro/dat/dat_manager.rb', line 103

def parse(dat_input)
  dat = Saro::Dat::Dat.from_value(dat_input)
  # 파싱 실패의 코드를 그대로 올린다.
  dat.raise_if_invalid!

  # 만료를 cid 조회보다 먼저 본다. 기준 구현(rust)이 토큰을 읽는 시점에
  # 만료를 판정하므로, 모르는 cid 의 만료 토큰도 만료로 보고된다.
  raise Saro::Dat::Error.new(Saro::Dat::ErrorCode::TOKEN_EXPIRED) if dat.expired?

  certificate = @state.by_cid[dat.cid]
  unless certificate
    raise Saro::Dat::Error.new(Saro::Dat::ErrorCode::CERT_NOT_FOUND, "cid #{dat.cid.to_s(16)}")
  end

  self.class._parse(certificate, dat)
end