Class: Saro::Dat::Dat

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

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dat_str) ⇒ Dat

Returns a new instance of Dat.



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# File 'lib/saro/dat/dat.rb', line 13

def initialize(dat_str)
  @dat = dat_str || ''
  @format = false
  @expire = 0
  @cid = 0
  @plain = "".b
  @secure = "".b
  @signature = "".b
  @error = nil

  if @dat.empty?
    @error = Saro::Dat::Error.new(Saro::Dat::ErrorCode::TOKEN_MALFORMED, "token is empty")
    return
  end

  parts = @dat.split('.', -1)
  if parts.length != 5
    @error = Saro::Dat::Error.new(Saro::Dat::ErrorCode::TOKEN_MALFORMED, "expected exactly 5 dot-separated fields")
    return
  end

  begin
    @expire = Saro::Dat::Util.parse_u64(parts[0])
  rescue Saro::Dat::Error => e
    @error = Saro::Dat::Error.new(Saro::Dat::ErrorCode::TOKEN_MALFORMED, "expire field is not a plain decimal u64", cause: e)
    return
  end

  begin
    @cid = Saro::Dat::Util.parse_u64_hex(parts[1])
  rescue Saro::Dat::Error => e
    @error = Saro::Dat::Error.new(Saro::Dat::ErrorCode::TOKEN_MALFORMED, "cid field is not a plain hex u64", cause: e)
    return
  end

  begin
    @plain = Saro::Dat::Util.decode_base64_url(parts[2])
  rescue Saro::Dat::Error => e
    @error = Saro::Dat::Error.new(Saro::Dat::ErrorCode::TOKEN_MALFORMED, "plain field is not base64url", cause: e)
    return
  end

  begin
    @secure = Saro::Dat::Util.decode_base64_url(parts[3])
  rescue Saro::Dat::Error => e
    @error = Saro::Dat::Error.new(Saro::Dat::ErrorCode::TOKEN_MALFORMED, "secure field is not base64url", cause: e)
    return
  end

  if parts[4].empty?
    @error = Saro::Dat::Error.new(Saro::Dat::ErrorCode::SIG_MALFORMED, "signature field is empty")
    return
  end

  begin
    @signature = Saro::Dat::Util.decode_base64_url(parts[4])
  rescue Saro::Dat::Error => e
    @error = Saro::Dat::Error.new(Saro::Dat::ErrorCode::SIG_MALFORMED, "signature field is not base64url", cause: e)
    return
  end

  if @signature.empty?
    @error = Saro::Dat::Error.new(Saro::Dat::ErrorCode::SIG_MALFORMED, "signature field is empty")
    return
  end

  @format = true
end

Instance Attribute Details

#cid ⇒ Object (readonly)

Returns the value of attribute cid.



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# File 'lib/saro/dat/dat.rb', line 9

def cid
  @cid
end

#dat ⇒ Object (readonly)

Returns the value of attribute dat.



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# File 'lib/saro/dat/dat.rb', line 9

def dat
  @dat
end

#error ⇒ Object (readonly)

Returns the value of attribute error.



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# File 'lib/saro/dat/dat.rb', line 11

def error
  @error
end

#expire ⇒ Object (readonly)

Returns the value of attribute expire.



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# File 'lib/saro/dat/dat.rb', line 9

def expire
  @expire
end

#format ⇒ Object (readonly)

Returns the value of attribute format.



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# File 'lib/saro/dat/dat.rb', line 9

def format
  @format
end

#plain ⇒ Object (readonly)

Returns the value of attribute plain.



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# File 'lib/saro/dat/dat.rb', line 9

def plain
  @plain
end

#secure ⇒ Object (readonly)

Returns the value of attribute secure.



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# File 'lib/saro/dat/dat.rb', line 9

def secure
  @secure
end

#signature ⇒ Object (readonly)

Returns the value of attribute signature.



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# File 'lib/saro/dat/dat.rb', line 9

def signature
  @signature
end

Class Method Details

.from_value(value) ⇒ Object 



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# File 'lib/saro/dat/dat.rb', line 87

def self.from_value(value)
  return value if value.is_a?(Dat)
  new(value)
end

Instance Method Details

#body_string ⇒ Object 



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# File 'lib/saro/dat/dat.rb', line 99

def body_string
  idx = @dat.rindex('.')
  return "" unless idx
  @dat[0, idx]
end

#expired ⇒ Object Also known as: expired? 



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# File 'lib/saro/dat/dat.rb', line 92

def expired
  return true unless @format
  Time.now.to_i >= @expire
end

#raise_if_invalid! ⇒ Object

Raises:



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

def raise_if_invalid!
  raise @error if @error
  nil
end