// Named EC curves

var BigInteger = require('bigi')
var ECCurveFp = require('./ec')
var ECPointFp = ECCurveFp.ECPointFp

// ----------------
// X9ECParameters

// constructor
function X9ECParameters(curve,g,n,h) {
    this.curve = curve
    this.g = g
    this.n = n
    this.h = h
}

function x9getCurve() {
    return this.curve
}

function x9getG() {
    return this.g
}

function x9getN() {
    return this.n
}

function x9getH() {
    return this.h
}

X9ECParameters.prototype.getCurve = x9getCurve
X9ECParameters.prototype.getG = x9getG
X9ECParameters.prototype.getN = x9getN
X9ECParameters.prototype.getH = x9getH

// ----------------
// SECNamedCurves

function secp128r1() {
    // p = 2^128 - 2^97 - 1
    var p = BigInteger.fromHex("FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF")
    var a = BigInteger.fromHex("FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFC")
    var b = BigInteger.fromHex("E87579C11079F43DD824993C2CEE5ED3")
    //byte[] S = BigInteger.fromHex("000E0D4D696E6768756151750CC03A4473D03679")
    var n = BigInteger.fromHex("FFFFFFFE0000000075A30D1B9038A115")
    var h = BigInteger.ONE
    var curve = new ECCurveFp(p, a, b)

    var x = BigInteger.fromHex("161FF7528B899B2D0C28607CA52C5B86")
    var y = BigInteger.fromHex("CF5AC8395BAFEB13C02DA292DDED7A83")
    var G = new ECPointFp(curve,
                          curve.fromBigInteger(x),
                          curve.fromBigInteger(y))

    return new X9ECParameters(curve, G, n, h)
}

function secp160k1() {
    // p = 2^160 - 2^32 - 2^14 - 2^12 - 2^9 - 2^8 - 2^7 - 2^3 - 2^2 - 1
    var p = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73")
    var a = BigInteger.ZERO
    var b = BigInteger.fromHex("07")
    //byte[] S = null
    var n = BigInteger.fromHex("0100000000000000000001B8FA16DFAB9ACA16B6B3")
    var h = BigInteger.ONE
    var curve = new ECCurveFp(p, a, b)

    var x = BigInteger.fromHex("3B4C382CE37AA192A4019E763036F4F5DD4D7EBB")
    var y = BigInteger.fromHex("938CF935318FDCED6BC28286531733C3F03C4FEE")
    var G = new ECPointFp(curve,
                          curve.fromBigInteger(x),
                          curve.fromBigInteger(y))

    return new X9ECParameters(curve, G, n, h)
}

function secp160r1() {
    // p = 2^160 - 2^31 - 1
    var p = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF")
    var a = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC")
    var b = BigInteger.fromHex("1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45")
    //byte[] S = BigInteger.fromHex("1053CDE42C14D696E67687561517533BF3F83345")
    var n = BigInteger.fromHex("0100000000000000000001F4C8F927AED3CA752257")
    var h = BigInteger.ONE
    var curve = new ECCurveFp(p, a, b)

    var x = BigInteger.fromHex("4A96B5688EF573284664698968C38BB913CBFC82")
    var y = BigInteger.fromHex("23A628553168947D59DCC912042351377AC5FB32")
    var G = new ECPointFp(curve,
                          curve.fromBigInteger(x),
                          curve.fromBigInteger(y))

    return new X9ECParameters(curve, G, n, h)
}

function secp192k1() {
    // p = 2^192 - 2^32 - 2^12 - 2^8 - 2^7 - 2^6 - 2^3 - 1
    var p = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFEE37")
    var a = BigInteger.ZERO
    var b = BigInteger.fromHex("03")
    //byte[] S = null
    var n = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFE26F2FC170F69466A74DEFD8D")
    var h = BigInteger.ONE
    var curve = new ECCurveFp(p, a, b)

    var x = BigInteger.fromHex("DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D")
    var y = BigInteger.fromHex("9B2F2F6D9C5628A7844163D015BE86344082AA88D95E2F9D")
    var G = new ECPointFp(curve,
                          curve.fromBigInteger(x),
                          curve.fromBigInteger(y))

    return new X9ECParameters(curve, G, n, h)
}

function secp192r1() {
    // p = 2^192 - 2^64 - 1
    var p = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF")
    var a = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC")
    var b = BigInteger.fromHex("64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1")
    //byte[] S = BigInteger.fromHex("3045AE6FC8422F64ED579528D38120EAE12196D5")
    var n = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831")
    var h = BigInteger.ONE
    var curve = new ECCurveFp(p, a, b)

    var x = BigInteger.fromHex("188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012")
    var y = BigInteger.fromHex("07192B95FFC8DA78631011ED6B24CDD573F977A11E794811")
    var G = new ECPointFp(curve,
                          curve.fromBigInteger(x),
                          curve.fromBigInteger(y))

    return new X9ECParameters(curve, G, n, h)
}

function secp224r1() {
    // p = 2^224 - 2^96 + 1
    var p = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001")
    var a = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFE")
    var b = BigInteger.fromHex("B4050A850C04B3ABF54132565044B0B7D7BFD8BA270B39432355FFB4")
    //byte[] S = BigInteger.fromHex("BD71344799D5C7FCDC45B59FA3B9AB8F6A948BC5")
    var n = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D")
    var h = BigInteger.ONE
    var curve = new ECCurveFp(p, a, b)

    var x = BigInteger.fromHex("B70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21")
    var y = BigInteger.fromHex("BD376388B5F723FB4C22DFE6CD4375A05A07476444D5819985007E34")
    var G = new ECPointFp(curve,
                          curve.fromBigInteger(x),
                          curve.fromBigInteger(y))

    return new X9ECParameters(curve, G, n, h)
}

function secp256k1() {
    // p = 2^256 - 2^32 - 2^9 - 2^8 - 2^7 - 2^6 - 2^4 - 1
    var p = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F")
    var a = BigInteger.ZERO
    var b = BigInteger.fromHex("07")
    //byte[] S = null
    var n = BigInteger.fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141")
    var h = BigInteger.ONE
    var curve = new ECCurveFp(p, a, b)

    var x = BigInteger.fromHex("79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798")
    var y = BigInteger.fromHex("483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8")
    var G = new ECPointFp(curve,
                          curve.fromBigInteger(x),
                          curve.fromBigInteger(y))

    return new X9ECParameters(curve, G, n, h)
}

function secp256r1() {
    // p = 2^224 (2^32 - 1) + 2^192 + 2^96 - 1
    var p = BigInteger.fromHex("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF")
    var a = BigInteger.fromHex("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC")
    var b = BigInteger.fromHex("5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B")
    //byte[] S = BigInteger.fromHex("C49D360886E704936A6678E1139D26B7819F7E90")
    var n = BigInteger.fromHex("FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551")
    var h = BigInteger.ONE
    var curve = new ECCurveFp(p, a, b)

    var x = BigInteger.fromHex("6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296")
    var y = BigInteger.fromHex("4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5")
    var G = new ECPointFp(curve,
                          curve.fromBigInteger(x),
                          curve.fromBigInteger(y))

    return new X9ECParameters(curve, G, n, h)
}

function getSECCurveByName(name) {
    return ({
      "secp128r1": secp128r1,
      "secp160k1": secp160k1,
      "secp160r1": secp160r1,
      "secp192k1": secp192k1,
      "secp192r1": secp192r1,
      "secp224r1": secp224r1,
      "secp256k1": secp256k1,
      "secp256r1": secp256r1
    }[name])()
}

module.exports = getSECCurveByName