'use strict';

var openpgp = typeof window !== 'undefined' && window.openpgp ? window.openpgp : require('../../dist/openpgp');

var expect = require('chai').expect;

var bin2bi = function (bytes) {
  var mpi = new openpgp.MPI();
  bytes = openpgp.util.bin2str(bytes);
  mpi.fromBytes(bytes);
  return mpi.toBigInteger();
};

describe('Elliptic Curve Cryptography', function () {
  var elliptic_curves = openpgp.crypto.publicKey.elliptic;
  var key_data = {
    p256: {
      priv: new Uint8Array([
        0x2B, 0x48, 0x2B, 0xE9, 0x88, 0x74, 0xE9, 0x49,
        0x1F, 0x89, 0xCC, 0xFF, 0x0A, 0x26, 0x05, 0xA2,
        0x3C, 0x2A, 0x35, 0x25, 0x26, 0x11, 0xD7, 0xEA,
        0xA1, 0xED, 0x29, 0x95, 0xB5, 0xE1, 0x5F, 0x1D]),
      pub: new Uint8Array([0x04,
        0x80, 0x2C, 0x40, 0x76, 0x31, 0x20, 0xB6, 0x9B,
        0x48, 0x3B, 0x05, 0xEB, 0x6C, 0x1E, 0x3F, 0x49,
        0x84, 0xF7, 0xD2, 0xAD, 0x16, 0xA1, 0x6F, 0x62,
        0xFD, 0xCA, 0xEC, 0xB4, 0xA0, 0xBD, 0x4C, 0x1A,
        0x6F, 0xAA, 0xE7, 0xFD, 0xC4, 0x7D, 0x89, 0xCC,
        0x06, 0xCA, 0xFE, 0xAE, 0xCD, 0x0E, 0x9E, 0x62,
        0x57, 0xA4, 0xC3, 0xE7, 0x5E, 0x69, 0x10, 0xEE,
        0x67, 0xC2, 0x09, 0xF9, 0xEF, 0xE7, 0x9E, 0x56])
    },
    p384: {
      priv: new Uint8Array([
        0xB5, 0x38, 0xDA, 0xF3, 0x77, 0x58, 0x3F, 0x94,
        0x5B, 0xC2, 0xCA, 0xC6, 0xA9, 0xFC, 0xAA, 0x3F,
        0x97, 0xB0, 0x54, 0x26, 0x10, 0xB4, 0xEC, 0x2A,
        0xA7, 0xC1, 0xA3, 0x4B, 0xC0, 0xBD, 0xFE, 0x3E,
        0xF1, 0xBE, 0x76, 0xCB, 0xE8, 0xAB, 0x3B, 0xBD,
        0xB6, 0x84, 0xC7, 0x8B, 0x91, 0x2F, 0x76, 0x8B]),
      pub: new Uint8Array([0x04,
        0x44, 0x83, 0xA0, 0x3E, 0x5B, 0x0A, 0x0D, 0x9B,
        0xA0, 0x06, 0xDF, 0x38, 0xC7, 0x64, 0xCD, 0x62,
        0x7D, 0x5E, 0x3D, 0x3B, 0x50, 0xF5, 0x06, 0xC7,
        0xF7, 0x9B, 0xF0, 0xDE, 0xB1, 0x0C, 0x64, 0x74,
        0x0D, 0x03, 0x67, 0x24, 0xA0, 0xFF, 0xD1, 0x3D,
        0x03, 0x96, 0x48, 0xE7, 0x73, 0x5E, 0xF1, 0xC0,
        0x62, 0xCC, 0x33, 0x5A, 0x2A, 0x66, 0xA7, 0xAB,
        0xCA, 0x77, 0x52, 0xB8, 0xCD, 0xB5, 0x91, 0x16,
        0xAF, 0x42, 0xBB, 0x79, 0x0A, 0x59, 0x51, 0x68,
        0x8E, 0xEA, 0x32, 0x7D, 0x4A, 0x4A, 0xBB, 0x26,
        0x13, 0xFB, 0x95, 0xC0, 0xB1, 0xA4, 0x54, 0xCA,
        0xFA, 0x85, 0x8A, 0x4B, 0x58, 0x7C, 0x61, 0x39])
    },
    p521: {
      priv: new Uint8Array([
        0x00, 0xBB, 0x35, 0x27, 0xBC, 0xD6, 0x7E, 0x35,
        0xD5, 0xC5, 0x99, 0xC9, 0xB4, 0x6C, 0xEE, 0xDE,
        0x79, 0x2D, 0x77, 0xBD, 0x0A, 0x08, 0x9A, 0xC2,
        0x21, 0xF8, 0x35, 0x1C, 0x49, 0x5C, 0x40, 0x11,
        0xAC, 0x95, 0x2A, 0xEE, 0x91, 0x3A, 0x60, 0x5A,
        0x25, 0x5A, 0x95, 0x38, 0xDC, 0xEB, 0x59, 0x8E,
        0x33, 0xAD, 0xC0, 0x0B, 0x56, 0xB1, 0x06, 0x8C,
        0x57, 0x48, 0xA3, 0x73, 0xDB, 0xE0, 0x19, 0x50,
        0x2E, 0x79]),
      pub: new Uint8Array([0x04,
        0x01, 0x0D, 0xD5, 0xCA, 0xD8, 0xB0, 0xEF, 0x9F,
        0x2B, 0x7E, 0x58, 0x99, 0xDE, 0x05, 0xF6, 0xF6,
        0x64, 0x6B, 0xCD, 0x59, 0x2E, 0x39, 0xB8, 0x82,
        0xB3, 0x13, 0xE6, 0x7D, 0x50, 0x85, 0xC3, 0xFA,
        0x93, 0xA5, 0x3F, 0x92, 0x85, 0x42, 0x36, 0xC0,
        0x83, 0xC9, 0xA4, 0x38, 0xB3, 0xD1, 0x99, 0xDA,
        0xE1, 0x02, 0x37, 0x7A, 0x3A, 0xC2, 0xB4, 0x55,
        0xEC, 0x1C, 0x0F, 0x00, 0x97, 0xFC, 0x75, 0x93,
        0xFE, 0x87, 0x00, 0x7D, 0xBE, 0x1A, 0xF5, 0xF9,
        0x57, 0x5C, 0xF2, 0x50, 0x2D, 0x14, 0x32, 0xEE,
        0x9B, 0xBE, 0xB3, 0x0E, 0x12, 0x2F, 0xF8, 0x85,
        0x11, 0x1A, 0x4F, 0x88, 0x50, 0xA4, 0xDB, 0x37,
        0xA6, 0x53, 0x5C, 0xB7, 0x87, 0xA6, 0x06, 0x21,
        0x15, 0xCC, 0x12, 0xC0, 0x1C, 0x83, 0x6F, 0x7B,
        0x5A, 0x8A, 0x36, 0x4E, 0x46, 0x9E, 0x54, 0x3F,
        0xE2, 0xF7, 0xED, 0x63, 0xC9, 0x92, 0xA4, 0x38,
        0x2B, 0x9C, 0xE2, 0xB7])
    },
    secp256k1: {
      priv: new Uint8Array([
        0x9E, 0xB0, 0x30, 0xD6, 0xE1, 0xCE, 0xAA, 0x0B,
        0x7B, 0x8F, 0xDE, 0x5D, 0x91, 0x4D, 0xDC, 0xA0,
        0xAD, 0x05, 0xAB, 0x8F, 0x87, 0x9B, 0x57, 0x48,
        0xAE, 0x8A, 0xE0, 0xF9, 0x39, 0xBD, 0x24, 0x00]),
      pub: new Uint8Array([0x04,
        0xA8, 0x02, 0x35, 0x2C, 0xB7, 0x24, 0x95, 0x51,
        0x0A, 0x65, 0x26, 0x7D, 0xDF, 0xEA, 0x64, 0xB3,
        0xA8, 0xE1, 0x4F, 0xDD, 0x12, 0x84, 0x7E, 0x59,
        0xDB, 0x81, 0x0F, 0x89, 0xED, 0xFB, 0x29, 0xFB,
        0x07, 0x60, 0x29, 0x7D, 0x39, 0x8F, 0xB8, 0x68,
        0xF0, 0xFD, 0xA6, 0x67, 0x83, 0x55, 0x75, 0x7D,
        0xB8, 0xFD, 0x0B, 0xDF, 0x76, 0xCE, 0xBC, 0x95,
        0x4B, 0x92, 0x26, 0xFC, 0xAA, 0x7A, 0x7C, 0x3F])
    }
  };
  var signature_data = {
    priv: new Uint8Array([
      0x14, 0x2B, 0xE2, 0xB7, 0x4D, 0xBD, 0x1B, 0x22,
      0x4D, 0xDF, 0x96, 0xA4, 0xED, 0x8E, 0x5B, 0xF9,
      0xBD, 0xD3, 0xFE, 0xAE, 0x3F, 0xB2, 0xCF, 0xEE,
      0xA7, 0xDB, 0xD0, 0x58, 0xA7, 0x47, 0xF8, 0x7C]),
    pub: new Uint8Array([0x04,
      0xD3, 0x36, 0x11, 0xF9, 0xF9, 0xAB, 0x39, 0x23,
      0x15, 0xB9, 0x71, 0x7B, 0x2A, 0x0B, 0xA6, 0x6D,
      0x39, 0x6D, 0x64, 0x87, 0x22, 0x9A, 0xA3, 0x0A,
      0x55, 0x27, 0x14, 0x2E, 0x1C, 0x61, 0xA2, 0x8A,
      0xDA, 0x4E, 0x8F, 0xCE, 0x04, 0xBE, 0xE2, 0xC3,
      0x82, 0x0B, 0x21, 0x4C, 0xBC, 0xED, 0x0E, 0xE2,
      0xF1, 0x14, 0x33, 0x9A, 0x86, 0x5F, 0xC6, 0xF9,
      0x8E, 0x95, 0x24, 0x10, 0x1F, 0x0F, 0x13, 0xE4]),
    message: new Uint8Array([
      0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
      0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F]),
    signature: {
      r: new Uint8Array([
        0xF1, 0x78, 0x1C, 0xA5, 0x13, 0x21, 0x0C, 0xBA,
        0x6F, 0x18, 0x5D, 0xB3, 0x01, 0xE2, 0x17, 0x1B,
        0x67, 0x65, 0x7F, 0xC6, 0x1F, 0x50, 0x12, 0xFB,
        0x2F, 0xD3, 0xA4, 0x29, 0xE3, 0xC2, 0x44, 0x9F]),
      s: new Uint8Array([
        0x7F, 0x08, 0x69, 0x6D, 0xBB, 0x1B, 0x9B, 0xF2,
        0x62, 0x1C, 0xCA, 0x80, 0xC6, 0x15, 0xB2, 0xAE,
        0x60, 0x50, 0xD1, 0xA7, 0x1B, 0x32, 0xF3, 0xB1,
        0x01, 0x0B, 0xDF, 0xC6, 0xAB, 0xF0, 0xEB, 0x01])
    }
  };
  describe('Basic Operations', function () {
    it('Creating curve with name', function (done) {
      var names = ['p256', 'p384', 'p521', 'secp256k1'];
      names.forEach(function (name) {
        expect(elliptic_curves.get(name)).to.exist;
      });
      done();
    });
    it('Creating curve from oid', function (done) {
      var oids = ['2A8648CE3D030107', '2B81040022', '2B81040023', '2B8104000A'];
      oids.forEach(function (oid) {
        expect(elliptic_curves.get(openpgp.util.hex2bin(oid))).to.exist;
      });
      done();
    });
    it('Creating KeyPair', function (done) {
      var names = ['p256', 'p384', 'p521', 'secp256k1'];
      names.forEach(function (name) {
        var curve = elliptic_curves.get(name);
        var keyPair = curve.genKeyPair();
        expect(keyPair).to.exist;
        expect(keyPair.isValid()).to.be.true;
      });
      done();
    });
    it('Creating KeyPair from data', function (done) {
      for (var name in key_data) {
        var pair = key_data[name];
        var curve = elliptic_curves.get(name);
        expect(curve).to.exist;
        var keyPair = curve.keyFromPrivate(pair.priv);
        expect(keyPair).to.exist;
        var pub = keyPair.getPublic();
        expect(pub).to.exist;
        expect(openpgp.util.hexidump(pub)).to.equal(openpgp.util.hexidump(pair.pub));
      }
      done();
    });
    it('Signature verification', function (done) {
      var curve = elliptic_curves.get('p256');
      var key = curve.keyFromPublic(signature_data.pub);
      expect(key.verify(signature_data.message, signature_data.signature, 8)).to.be.true;
      done();
    });
    it('Invalid signature', function (done) {
      var curve = elliptic_curves.get('p256');
      var key = curve.keyFromPublic(key_data.p256.pub);
      expect(key.verify(signature_data.message, signature_data.signature, 8)).to.be.false;
      done();
    });
    it('Signature generation', function (done) {
      var curve = elliptic_curves.get('p256');
      var key = curve.keyFromPrivate(key_data.p256.priv);
      var signature = key.sign(signature_data.message, 8);
      key = curve.keyFromPublic(key_data.p256.pub);
      expect(key.verify(signature_data.message, signature, 8)).to.be.true;
      done();
    });
    it('Shared secret generation', function (done) {
      var curve = elliptic_curves.get('p256');
      var key1 = curve.keyFromPrivate(key_data.p256.priv);
      var key2 = curve.keyFromPublic(signature_data.pub);
      var shared1 = openpgp.util.hexidump(key1.derive(key2));
      key1 = curve.keyFromPublic(key_data.p256.pub);
      key2 = curve.keyFromPrivate(signature_data.priv);
      var shared2 = openpgp.util.hexidump(key2.derive(key1));
      expect(shared1).to.equal(shared2);
      done();
    });
  });
  describe('ECDSA signature', function () {
    var verify_signature = function (oid, hash, r, s, pub, message) {
      if (openpgp.util.isString(message)) {
        message = openpgp.util.str2Uint8Array(message);
      } else if (!openpgp.util.isUint8Array(message)) {
        message = new Uint8Array(message);
      }
      return function () {
        var ecdsa = elliptic_curves.ecdsa;
        return ecdsa.verify(oid,
          hash,
          {r: bin2bi(r), s: bin2bi(s)},
          message,
          bin2bi(pub)
        );
      };
    };
    var secp256k1_dummy_value = new Uint8Array([
      0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    var secp256k1_dummy_point = new Uint8Array([0x04,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    var secp256k1_invalid_point = new Uint8Array([0x04,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    it('Invalid curve oid', function (done) {
      var res = verify_signature('invalid oid', 8, [], [], [], []);
      expect(res).to.throw(Error, /Not valid curve/);
      res = verify_signature("\x00", 8, [], [], [], []);
      expect(res).to.throw(Error, /Not valid curve/);
      done();
    });
    it('Invalid public key', function (done) {
      var res = verify_signature('secp256k1', 8, [], [], [], []);
      expect(res).to.throw(Error, /Unknown point format/);
      res = verify_signature('secp256k1', 8, [], [], secp256k1_invalid_point, []);
      expect(res).to.throw(Error, /Unknown point format/);
      done();
    });
    it('Invalid signature', function (done) {
      var res = verify_signature('secp256k1', 8, [], [], secp256k1_dummy_point, []);
      expect(res()).to.be.false;
      done();
    });

    var p384_message = new Uint8Array([
      0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
      0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF]);
    var p384_r = new Uint8Array([
      0x9D, 0x07, 0xCA, 0xA5, 0x9F, 0xBE, 0xB8, 0x76,
      0xA9, 0xB9, 0x66, 0x0F, 0xA0, 0x64, 0x70, 0x5D,
      0xE6, 0x37, 0x40, 0x43, 0xD0, 0x8E, 0x40, 0xA8,
      0x8B, 0x37, 0x83, 0xE7, 0xBC, 0x1C, 0x4C, 0x86,
      0xCB, 0x3C, 0xD5, 0x9B, 0x68, 0xF0, 0x65, 0xEB,
      0x3A, 0xB6, 0xD6, 0xA6, 0xCF, 0x85, 0x3D, 0xA9]);
    var p384_s = new Uint8Array([
      0x32, 0x85, 0x78, 0xCC, 0xEA, 0xC5, 0x22, 0x83,
      0x10, 0x73, 0x1C, 0xCF, 0x10, 0x8A, 0x52, 0x11,
      0x8E, 0x49, 0x9E, 0xCF, 0x7E, 0x17, 0x18, 0xC3,
      0x11, 0x11, 0xBC, 0x0F, 0x6D, 0x98, 0xE2, 0x16,
      0x68, 0x58, 0x23, 0x1D, 0x11, 0xEF, 0x3D, 0x21,
      0x30, 0x75, 0x24, 0x39, 0x48, 0x89, 0x03, 0xDC]);
    it('Valid signature', function (done) {
      var res = verify_signature('p384', 8, p384_r, p384_s, key_data.p384.pub, p384_message);
      expect(res()).to.be.true;
      done();
    });
    it('Sign and verify message', function (done) {
      var curve = elliptic_curves.get('p521');
      var keyPair = curve.genKeyPair();
      var keyPublic = bin2bi(keyPair.getPublic());
      var keyPrivate = bin2bi(keyPair.getPrivate());
      var oid = curve.oid;
      var message = p384_message;
      var signature = elliptic_curves.ecdsa.sign(oid, 10, message, keyPrivate);
      var verified = elliptic_curves.ecdsa.verify(oid, 10, signature, message, keyPublic);
      expect(verified).to.be.true;
      done();
    });
  });
  describe('ECDH key exchange', function () {
    var decrypt_message = function (oid, hash, cipher, priv, ephemeral, data, fingerprint) {
      if (typeof data === 'string') {
        data = openpgp.util.str2Uint8Array(data);
      } else {
        data = new Uint8Array(data);
      }
      return function () {
        var ecdh = elliptic_curves.ecdh;
        return ecdh.decrypt(
          oid,
          cipher,
          hash,
          bin2bi(ephemeral),
          data,
          bin2bi(priv),
          fingerprint
        );
      };
    };
    var secp256k1_value = new Uint8Array([
      0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    var secp256k1_point = new Uint8Array([0x04,
      0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
    var secp256k1_data = new Uint8Array([
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);

    it('Invalid curve oid', function (done) {
      var res = decrypt_message('', 2, 7, [], [], [], '');
      expect(res).to.throw(Error, /Not valid curve/);
      done();
    });
    it('Invalid ephemeral key', function (done) {
      var res = decrypt_message('secp256k1', 2, 7, [], [], [], '');
      expect(res).to.throw(Error, /Unknown point format/);
      done();
    });
    it('Invalid key data integrity', function (done) {
      var res = decrypt_message('secp256k1', 2, 7, secp256k1_value, secp256k1_point, secp256k1_data, '');
      expect(res).to.throw(Error, /Key Data Integrity failed/);
      done();
    });
  });
});