Class: EllipticCurve::Utils::Oid

Inherits:
Object
  • Object
show all
Defined in:
lib/utils/oid.rb

Class Method Summary collapse

Class Method Details

._oidNumberToHex(number) ⇒ Object 



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# File 'lib/utils/oid.rb', line 31

def self._oidNumberToHex(number)
    hexadecimal = ""
    endDelta = 0
    while number > 0
        hexadecimal = Utils::Binary.hexFromInt((number % 128) + endDelta) + hexadecimal
        number = number.div(128)
        endDelta = 128
    end
    return hexadecimal == "" ? "00" : hexadecimal
end

.oidFromHex(hexadecimal) ⇒ Object 



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# File 'lib/utils/oid.rb', line 4

def self.oidFromHex(hexadecimal)
    firstByte, remainingBytes = hexadecimal[0..1], hexadecimal[2..-1]
    firstByteInt = Utils::Binary.intFromHex(firstByte)
    oid = [firstByteInt.div(40), firstByteInt % 40]
    oidInt = 0
    while remainingBytes.to_s.length > 0
        byte, remainingBytes = remainingBytes[0..1], remainingBytes[2..-1]
        byteInt = Utils::Binary.intFromHex(byte)
        if byteInt >= 128
            oidInt = (128 * oidInt) + (byteInt - 128)
            next
        end
        oidInt = (128 * oidInt) + byteInt
        oid.append(oidInt)
        oidInt = 0
    end
    return oid
end

.oidToHex(oid) ⇒ Object 



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# File 'lib/utils/oid.rb', line 23

def self.oidToHex(oid)
    hexadecimal = Utils::Binary.hexFromInt(40 * oid[0] + oid[1])
    for number in oid[2..-1]
        hexadecimal += self._oidNumberToHex(number)
    end
    return hexadecimal
end