Add 3rdparty dependencies (used by libsignal)

Hopefully later we can use NPM for them, first want to get things to work

3rdparty/long.js

+/*
+ Copyright 2013 Daniel Wirtz <dcode@dcode.io>
+ Copyright 2009 The Closure Library Authors. All Rights Reserved.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS-IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+/**
+ * @license long.js (c) 2013 Daniel Wirtz <dcode@dcode.io>
+ * Released under the Apache License, Version 2.0
+ * see: https://github.com/dcodeIO/long.js for details
+ */
+(function(global, factory) {
+    /* AMD */ if (typeof define === 'function' && define["amd"])
+        define([], factory);
+    /* CommonJS */ else if (typeof require === 'function' && typeof module === "object" && module && module["exports"])
+        module["exports"] = factory();
+    /* Global */ else
+        (global["dcodeIO"] = global["dcodeIO"] || {})["Long"] = factory();
+
+})(this, function() {
+    "use strict";
+
+    /**
+     * Constructs a 64 bit two's-complement integer, given its low and high 32 bit values as *signed* integers.
+     *  See the from* functions below for more convenient ways of constructing Longs.
+     * @exports Long
+     * @class A Long class for representing a 64 bit two's-complement integer value.
+     * @param {number} low The low (signed) 32 bits of the long
+     * @param {number} high The high (signed) 32 bits of the long
+     * @param {boolean=} unsigned Whether unsigned or not, defaults to `false` for signed
+     * @constructor
+     */
+    function Long(low, high, unsigned) {
+
+        /**
+         * The low 32 bits as a signed value.
+         * @type {number}
+         */
+        this.low = low | 0;
+
+        /**
+         * The high 32 bits as a signed value.
+         * @type {number}
+         */
+        this.high = high | 0;
+
+        /**
+         * Whether unsigned or not.
+         * @type {boolean}
+         */
+        this.unsigned = !!unsigned;
+    }
+
+    // The internal representation of a long is the two given signed, 32-bit values.
+    // We use 32-bit pieces because these are the size of integers on which
+    // Javascript performs bit-operations.  For operations like addition and
+    // multiplication, we split each number into 16 bit pieces, which can easily be
+    // multiplied within Javascript's floating-point representation without overflow
+    // or change in sign.
+    //
+    // In the algorithms below, we frequently reduce the negative case to the
+    // positive case by negating the input(s) and then post-processing the result.
+    // Note that we must ALWAYS check specially whether those values are MIN_VALUE
+    // (-2^63) because -MIN_VALUE == MIN_VALUE (since 2^63 cannot be represented as
+    // a positive number, it overflows back into a negative).  Not handling this
+    // case would often result in infinite recursion.
+    //
+    // Common constant values ZERO, ONE, NEG_ONE, etc. are defined below the from*
+    // methods on which they depend.
+
+    /**
+     * An indicator used to reliably determine if an object is a Long or not.
+     * @type {boolean}
+     * @const
+     * @private
+     */
+    Long.prototype.__isLong__;
+
+    Object.defineProperty(Long.prototype, "__isLong__", {
+        value: true,
+        enumerable: false,
+        configurable: false
+    });
+
+    /**
+     * @function
+     * @param {*} obj Object
+     * @returns {boolean}
+     * @inner
+     */
+    function isLong(obj) {
+        return (obj && obj["__isLong__"]) === true;
+    }
+
+    /**
+     * Tests if the specified object is a Long.
+     * @function
+     * @param {*} obj Object
+     * @returns {boolean}
+     */
+    Long.isLong = isLong;
+
+    /**
+     * A cache of the Long representations of small integer values.
+     * @type {!Object}
+     * @inner
+     */
+    var INT_CACHE = {};
+
+    /**
+     * A cache of the Long representations of small unsigned integer values.
+     * @type {!Object}
+     * @inner
+     */
+    var UINT_CACHE = {};
+
+    /**
+     * @param {number} value
+     * @param {boolean=} unsigned
+     * @returns {!Long}
+     * @inner
+     */
+    function fromInt(value, unsigned) {
+        var obj, cachedObj, cache;
+        if (unsigned) {
+            value >>>= 0;
+            if (cache = (0 <= value && value < 256)) {
+                cachedObj = UINT_CACHE[value];
+                if (cachedObj)
+                    return cachedObj;
+            }
+            obj = fromBits(value, (value | 0) < 0 ? -1 : 0, true);
+            if (cache)
+                UINT_CACHE[value] = obj;
+            return obj;
+        } else {
+            value |= 0;
+            if (cache = (-128 <= value && value < 128)) {
+                cachedObj = INT_CACHE[value];
+                if (cachedObj)
+                    return cachedObj;
+            }
+            obj = fromBits(value, value < 0 ? -1 : 0, false);
+            if (cache)
+                INT_CACHE[value] = obj;
+            return obj;
+        }
+    }
+
+    /**
+     * Returns a Long representing the given 32 bit integer value.
+     * @function
+     * @param {number} value The 32 bit integer in question
+     * @param {boolean=} unsigned Whether unsigned or not, defaults to `false` for signed
+     * @returns {!Long} The corresponding Long value
+     */
+    Long.fromInt = fromInt;
+
+    /**
+     * @param {number} value
+     * @param {boolean=} unsigned
+     * @returns {!Long}
+     * @inner
+     */
+    function fromNumber(value, unsigned) {
+        if (isNaN(value) || !isFinite(value))
+            return unsigned ? UZERO : ZERO;
+        if (unsigned) {
+            if (value < 0)
+                return UZERO;
+            if (value >= TWO_PWR_64_DBL)
+                return MAX_UNSIGNED_VALUE;
+        } else {
+            if (value <= -TWO_PWR_63_DBL)
+                return MIN_VALUE;
+            if (value + 1 >= TWO_PWR_63_DBL)
+                return MAX_VALUE;
+        }
+        if (value < 0)
+            return fromNumber(-value, unsigned).neg();
+        return fromBits((value % TWO_PWR_32_DBL) | 0, (value / TWO_PWR_32_DBL) | 0, unsigned);
+    }
+
+    /**
+     * Returns a Long representing the given value, provided that it is a finite number. Otherwise, zero is returned.
+     * @function
+     * @param {number} value The number in question
+     * @param {boolean=} unsigned Whether unsigned or not, defaults to `false` for signed
+     * @returns {!Long} The corresponding Long value
+     */
+    Long.fromNumber = fromNumber;
+
+    /**
+     * @param {number} lowBits
+     * @param {number} highBits
+     * @param {boolean=} unsigned
+     * @returns {!Long}
+     * @inner
+     */
+    function fromBits(lowBits, highBits, unsigned) {
+        return new Long(lowBits, highBits, unsigned);
+    }
+
+    /**
+     * Returns a Long representing the 64 bit integer that comes by concatenating the given low and high bits. Each is
+     *  assumed to use 32 bits.
+     * @function
+     * @param {number} lowBits The low 32 bits
+     * @param {number} highBits The high 32 bits
+     * @param {boolean=} unsigned Whether unsigned or not, defaults to `false` for signed
+     * @returns {!Long} The corresponding Long value
+     */
+    Long.fromBits = fromBits;
+
+    /**
+     * @function
+     * @param {number} base
+     * @param {number} exponent
+     * @returns {number}
+     * @inner
+     */
+    var pow_dbl = Math.pow; // Used 4 times (4*8 to 15+4)
+
+    /**
+     * @param {string} str
+     * @param {(boolean|number)=} unsigned
+     * @param {number=} radix
+     * @returns {!Long}
+     * @inner
+     */
+    function fromString(str, unsigned, radix) {
+        if (str.length === 0)
+            throw Error('empty string');
+        if (str === "NaN" || str === "Infinity" || str === "+Infinity" || str === "-Infinity")
+            return ZERO;
+        if (typeof unsigned === 'number') {
+            // For goog.math.long compatibility
+            radix = unsigned,
+            unsigned = false;
+        } else {
+            unsigned = !! unsigned;
+        }
+        radix = radix || 10;
+        if (radix < 2 || 36 < radix)
+            throw RangeError('radix');
+
+        var p;
+        if ((p = str.indexOf('-')) > 0)
+            throw Error('interior hyphen');
+        else if (p === 0) {
+            return fromString(str.substring(1), unsigned, radix).neg();
+        }
+
+        // Do several (8) digits each time through the loop, so as to
+        // minimize the calls to the very expensive emulated div.
+        var radixToPower = fromNumber(pow_dbl(radix, 8));
+
+        var result = ZERO;
+        for (var i = 0; i < str.length; i += 8) {
+            var size = Math.min(8, str.length - i),
+                value = parseInt(str.substring(i, i + size), radix);
+            if (size < 8) {
+                var power = fromNumber(pow_dbl(radix, size));
+                result = result.mul(power).add(fromNumber(value));
+            } else {
+                result = result.mul(radixToPower);
+                result = result.add(fromNumber(value));
+            }
+        }
+        result.unsigned = unsigned;
+        return result;
+    }
+
+    /**
+     * Returns a Long representation of the given string, written using the specified radix.
+     * @function
+     * @param {string} str The textual representation of the Long
+     * @param {(boolean|number)=} unsigned Whether unsigned or not, defaults to `false` for signed
+     * @param {number=} radix The radix in which the text is written (2-36), defaults to 10
+     * @returns {!Long} The corresponding Long value
+     */
+    Long.fromString = fromString;
+
+    /**
+     * @function
+     * @param {!Long|number|string|!{low: number, high: number, unsigned: boolean}} val
+     * @returns {!Long}
+     * @inner
+     */
+    function fromValue(val) {
+        if (val /* is compatible */ instanceof Long)
+            return val;
+        if (typeof val === 'number')
+            return fromNumber(val);
+        if (typeof val === 'string')
+            return fromString(val);
+        // Throws for non-objects, converts non-instanceof Long:
+        return fromBits(val.low, val.high, val.unsigned);
+    }
+
+    /**
+     * Converts the specified value to a Long.
+     * @function
+     * @param {!Long|number|string|!{low: number, high: number, unsigned: boolean}} val Value
+     * @returns {!Long}
+     */
+    Long.fromValue = fromValue;
+
+    // NOTE: the compiler should inline these constant values below and then remove these variables, so there should be
+    // no runtime penalty for these.
+
+    /**
+     * @type {number}
+     * @const
+     * @inner
+     */
+    var TWO_PWR_16_DBL = 1 << 16;
+
+    /**
+     * @type {number}
+     * @const
+     * @inner
+     */
+    var TWO_PWR_24_DBL = 1 << 24;
+
+    /**
+     * @type {number}
+     * @const
+     * @inner
+     */
+    var TWO_PWR_32_DBL = TWO_PWR_16_DBL * TWO_PWR_16_DBL;
+
+    /**
+     * @type {number}
+     * @const
+     * @inner
+     */
+    var TWO_PWR_64_DBL = TWO_PWR_32_DBL * TWO_PWR_32_DBL;
+
+    /**
+     * @type {number}
+     * @const
+     * @inner
+     */
+    var TWO_PWR_63_DBL = TWO_PWR_64_DBL / 2;
+
+    /**
+     * @type {!Long}
+     * @const
+     * @inner
+     */
+    var TWO_PWR_24 = fromInt(TWO_PWR_24_DBL);
+
+    /**
+     * @type {!Long}
+     * @inner
+     */
+    var ZERO = fromInt(0);
+
+    /**
+     * Signed zero.
+     * @type {!Long}
+     */
+    Long.ZERO = ZERO;
+
+    /**
+     * @type {!Long}
+     * @inner
+     */
+    var UZERO = fromInt(0, true);
+
+    /**
+     * Unsigned zero.
+     * @type {!Long}
+     */
+    Long.UZERO = UZERO;
+
+    /**
+     * @type {!Long}
+     * @inner
+     */
+    var ONE = fromInt(1);
+
+    /**
+     * Signed one.
+     * @type {!Long}
+     */
+    Long.ONE = ONE;
+
+    /**
+     * @type {!Long}
+     * @inner
+     */
+    var UONE = fromInt(1, true);
+
+    /**
+     * Unsigned one.
+     * @type {!Long}
+     */
+    Long.UONE = UONE;
+
+    /**
+     * @type {!Long}
+     * @inner
+     */
+    var NEG_ONE = fromInt(-1);
+
+    /**
+     * Signed negative one.
+     * @type {!Long}
+     */
+    Long.NEG_ONE = NEG_ONE;
+
+    /**
+     * @type {!Long}
+     * @inner
+     */
+    var MAX_VALUE = fromBits(0xFFFFFFFF|0, 0x7FFFFFFF|0, false);
+
+    /**
+     * Maximum signed value.
+     * @type {!Long}
+     */
+    Long.MAX_VALUE = MAX_VALUE;
+
+    /**
+     * @type {!Long}
+     * @inner
+     */
+    var MAX_UNSIGNED_VALUE = fromBits(0xFFFFFFFF|0, 0xFFFFFFFF|0, true);
+
+    /**
+     * Maximum unsigned value.
+     * @type {!Long}
+     */
+    Long.MAX_UNSIGNED_VALUE = MAX_UNSIGNED_VALUE;
+
+    /**
+     * @type {!Long}
+     * @inner
+     */
+    var MIN_VALUE = fromBits(0, 0x80000000|0, false);
+
+    /**
+     * Minimum signed value.
+     * @type {!Long}
+     */
+    Long.MIN_VALUE = MIN_VALUE;
+
+    /**
+     * @alias Long.prototype
+     * @inner
+     */
+    var LongPrototype = Long.prototype;
+
+    /**
+     * Converts the Long to a 32 bit integer, assuming it is a 32 bit integer.
+     * @returns {number}
+     */
+    LongPrototype.toInt = function toInt() {
+        return this.unsigned ? this.low >>> 0 : this.low;
+    };
+
+    /**
+     * Converts the Long to a the nearest floating-point representation of this value (double, 53 bit mantissa).
+     * @returns {number}
+     */
+    LongPrototype.toNumber = function toNumber() {
+        if (this.unsigned)
+            return ((this.high >>> 0) * TWO_PWR_32_DBL) + (this.low >>> 0);
+        return this.high * TWO_PWR_32_DBL + (this.low >>> 0);
+    };
+
+    /**
+     * Converts the Long to a string written in the specified radix.
+     * @param {number=} radix Radix (2-36), defaults to 10
+     * @returns {string}
+     * @override
+     * @throws {RangeError} If `radix` is out of range
+     */
+    LongPrototype.toString = function toString(radix) {
+        radix = radix || 10;
+        if (radix < 2 || 36 < radix)
+            throw RangeError('radix');
+        if (this.isZero())
+            return '0';
+        if (this.isNegative()) { // Unsigned Longs are never negative
+            if (this.eq(MIN_VALUE)) {
+                // We need to change the Long value before it can be negated, so we remove
+                // the bottom-most digit in this base and then recurse to do the rest.
+                var radixLong = fromNumber(radix),
+                    div = this.div(radixLong),
+                    rem1 = div.mul(radixLong).sub(this);
+                return div.toString(radix) + rem1.toInt().toString(radix);
+            } else
+                return '-' + this.neg().toString(radix);
+        }
+
+        // Do several (6) digits each time through the loop, so as to
+        // minimize the calls to the very expensive emulated div.
+        var radixToPower = fromNumber(pow_dbl(radix, 6), this.unsigned),
+            rem = this;
+        var result = '';
+        while (true) {
+            var remDiv = rem.div(radixToPower),
+                intval = rem.sub(remDiv.mul(radixToPower)).toInt() >>> 0,
+                digits = intval.toString(radix);
+            rem = remDiv;
+            if (rem.isZero())
+                return digits + result;
+            else {
+                while (digits.length < 6)
+                    digits = '0' + digits;
+                result = '' + digits + result;
+            }
+        }
+    };
+
+    /**
+     * Gets the high 32 bits as a signed integer.
+     * @returns {number} Signed high bits
+     */
+    LongPrototype.getHighBits = function getHighBits() {
+        return this.high;
+    };
+
+    /**
+     * Gets the high 32 bits as an unsigned integer.
+     * @returns {number} Unsigned high bits
+     */
+    LongPrototype.getHighBitsUnsigned = function getHighBitsUnsigned() {
+        return this.high >>> 0;
+    };
+
+    /**
+     * Gets the low 32 bits as a signed integer.
+     * @returns {number} Signed low bits
+     */
+    LongPrototype.getLowBits = function getLowBits() {
+        return this.low;
+    };
+
+    /**
+     * Gets the low 32 bits as an unsigned integer.
+     * @returns {number} Unsigned low bits
+     */
+    LongPrototype.getLowBitsUnsigned = function getLowBitsUnsigned() {
+        return this.low >>> 0;
+    };
+
+    /**
+     * Gets the number of bits needed to represent the absolute value of this Long.
+     * @returns {number}
+     */
+    LongPrototype.getNumBitsAbs = function getNumBitsAbs() {
+        if (this.isNegative()) // Unsigned Longs are never negative
+            return this.eq(MIN_VALUE) ? 64 : this.neg().getNumBitsAbs();
+        var val = this.high != 0 ? this.high : this.low;
+        for (var bit = 31; bit > 0; bit--)
+            if ((val & (1 << bit)) != 0)
+                break;
+        return this.high != 0 ? bit + 33 : bit + 1;
+    };
+
+    /**
+     * Tests if this Long's value equals zero.
+     * @returns {boolean}
+     */
+    LongPrototype.isZero = function isZero() {
+        return this.high === 0 && this.low === 0;
+    };
+
+    /**
+     * Tests if this Long's value is negative.
+     * @returns {boolean}
+     */
+    LongPrototype.isNegative = function isNegative() {
+        return !this.unsigned && this.high < 0;
+    };
+
+    /**
+     * Tests if this Long's value is positive.
+     * @returns {boolean}
+     */
+    LongPrototype.isPositive = function isPositive() {
+        return this.unsigned || this.high >= 0;
+    };
+
+    /**
+     * Tests if this Long's value is odd.
+     * @returns {boolean}
+     */
+    LongPrototype.isOdd = function isOdd() {
+        return (this.low & 1) === 1;
+    };
+
+    /**
+     * Tests if this Long's value is even.
+     * @returns {boolean}
+     */
+    LongPrototype.isEven = function isEven() {
+        return (this.low & 1) === 0;
+    };
+
+    /**
+     * Tests if this Long's value equals the specified's.
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.equals = function equals(other) {
+        if (!isLong(other))
+            other = fromValue(other);
+        if (this.unsigned !== other.unsigned && (this.high >>> 31) === 1 && (other.high >>> 31) === 1)
+            return false;
+        return this.high === other.high && this.low === other.low;
+    };
+
+    /**
+     * Tests if this Long's value equals the specified's. This is an alias of {@link Long#equals}.
+     * @function
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.eq = LongPrototype.equals;
+
+    /**
+     * Tests if this Long's value differs from the specified's.
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.notEquals = function notEquals(other) {
+        return !this.eq(/* validates */ other);
+    };
+
+    /**
+     * Tests if this Long's value differs from the specified's. This is an alias of {@link Long#notEquals}.
+     * @function
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.neq = LongPrototype.notEquals;
+
+    /**
+     * Tests if this Long's value is less than the specified's.
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.lessThan = function lessThan(other) {
+        return this.comp(/* validates */ other) < 0;
+    };
+
+    /**
+     * Tests if this Long's value is less than the specified's. This is an alias of {@link Long#lessThan}.
+     * @function
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.lt = LongPrototype.lessThan;
+
+    /**
+     * Tests if this Long's value is less than or equal the specified's.
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.lessThanOrEqual = function lessThanOrEqual(other) {
+        return this.comp(/* validates */ other) <= 0;
+    };
+
+    /**
+     * Tests if this Long's value is less than or equal the specified's. This is an alias of {@link Long#lessThanOrEqual}.
+     * @function
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.lte = LongPrototype.lessThanOrEqual;
+
+    /**
+     * Tests if this Long's value is greater than the specified's.
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.greaterThan = function greaterThan(other) {
+        return this.comp(/* validates */ other) > 0;
+    };
+
+    /**
+     * Tests if this Long's value is greater than the specified's. This is an alias of {@link Long#greaterThan}.
+     * @function
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.gt = LongPrototype.greaterThan;
+
+    /**
+     * Tests if this Long's value is greater than or equal the specified's.
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.greaterThanOrEqual = function greaterThanOrEqual(other) {
+        return this.comp(/* validates */ other) >= 0;
+    };
+
+    /**
+     * Tests if this Long's value is greater than or equal the specified's. This is an alias of {@link Long#greaterThanOrEqual}.
+     * @function
+     * @param {!Long|number|string} other Other value
+     * @returns {boolean}
+     */
+    LongPrototype.gte = LongPrototype.greaterThanOrEqual;
+
+    /**
+     * Compares this Long's value with the specified's.
+     * @param {!Long|number|string} other Other value
+     * @returns {number} 0 if they are the same, 1 if the this is greater and -1
+     *  if the given one is greater
+     */
+    LongPrototype.compare = function compare(other) {
+        if (!isLong(other))
+            other = fromValue(other);
+        if (this.eq(other))
+            return 0;
+        var thisNeg = this.isNegative(),
+            otherNeg = other.isNegative();
+        if (thisNeg && !otherNeg)
+            return -1;
+        if (!thisNeg && otherNeg)
+            return 1;
+        // At this point the sign bits are the same
+        if (!this.unsigned)
+            return this.sub(other).isNegative() ? -1 : 1;
+        // Both are positive if at least one is unsigned
+        return (other.high >>> 0) > (this.high >>> 0) || (other.high === this.high && (other.low >>> 0) > (this.low >>> 0)) ? -1 : 1;
+    };
+
+    /**
+     * Compares this Long's value with the specified's. This is an alias of {@link Long#compare}.
+     * @function
+     * @param {!Long|number|string} other Other value
+     * @returns {number} 0 if they are the same, 1 if the this is greater and -1
+     *  if the given one is greater
+     */
+    LongPrototype.comp = LongPrototype.compare;
+
+    /**
+     * Negates this Long's value.
+     * @returns {!Long} Negated Long
+     */
+    LongPrototype.negate = function negate() {
+        if (!this.unsigned && this.eq(MIN_VALUE))
+            return MIN_VALUE;
+        return this.not().add(ONE);
+    };
+
+    /**
+     * Negates this Long's value. This is an alias of {@link Long#negate}.
+     * @function
+     * @returns {!Long} Negated Long
+     */
+    LongPrototype.neg = LongPrototype.negate;
+
+    /**
+     * Returns the sum of this and the specified Long.
+     * @param {!Long|number|string} addend Addend
+     * @returns {!Long} Sum
+     */
+    LongPrototype.add = function add(addend) {
+        if (!isLong(addend))
+            addend = fromValue(addend);
+
+        // Divide each number into 4 chunks of 16 bits, and then sum the chunks.
+
+        var a48 = this.high >>> 16;
+        var a32 = this.high & 0xFFFF;
+        var a16 = this.low >>> 16;
+        var a00 = this.low & 0xFFFF;
+
+        var b48 = addend.high >>> 16;
+        var b32 = addend.high & 0xFFFF;
+        var b16 = addend.low >>> 16;
+        var b00 = addend.low & 0xFFFF;
+
+        var c48 = 0, c32 = 0, c16 = 0, c00 = 0;
+        c00 += a00 + b00;
+        c16 += c00 >>> 16;
+        c00 &= 0xFFFF;
+        c16 += a16 + b16;
+        c32 += c16 >>> 16;
+        c16 &= 0xFFFF;
+        c32 += a32 + b32;
+        c48 += c32 >>> 16;
+        c32 &= 0xFFFF;
+        c48 += a48 + b48;
+        c48 &= 0xFFFF;
+        return fromBits((c16 << 16) | c00, (c48 << 16) | c32, this.unsigned);
+    };
+
+    /**
+     * Returns the difference of this and the specified Long.
+     * @param {!Long|number|string} subtrahend Subtrahend
+     * @returns {!Long} Difference
+     */
+    LongPrototype.subtract = function subtract(subtrahend) {
+        if (!isLong(subtrahend))
+            subtrahend = fromValue(subtrahend);
+        return this.add(subtrahend.neg());
+    };
+
+    /**
+     * Returns the difference of this and the specified Long. This is an alias of {@link Long#subtract}.
+     * @function
+     * @param {!Long|number|string} subtrahend Subtrahend
+     * @returns {!Long} Difference
+     */
+    LongPrototype.sub = LongPrototype.subtract;
+
+    /**
+     * Returns the product of this and the specified Long.
+     * @param {!Long|number|string} multiplier Multiplier
+     * @returns {!Long} Product
+     */
+    LongPrototype.multiply = function multiply(multiplier) {
+        if (this.isZero())
+            return ZERO;
+        if (!isLong(multiplier))
+            multiplier = fromValue(multiplier);
+        if (multiplier.isZero())
+            return ZERO;
+        if (this.eq(MIN_VALUE))
+            return multiplier.isOdd() ? MIN_VALUE : ZERO;
+        if (multiplier.eq(MIN_VALUE))
+            return this.isOdd() ? MIN_VALUE : ZERO;
+
+        if (this.isNegative()) {
+            if (multiplier.isNegative())
+                return this.neg().mul(multiplier.neg());
+            else
+                return this.neg().mul(multiplier).neg();
+        } else if (multiplier.isNegative())
+            return this.mul(multiplier.neg()).neg();
+
+        // If both longs are small, use float multiplication
+        if (this.lt(TWO_PWR_24) && multiplier.lt(TWO_PWR_24))
+            return fromNumber(this.toNumber() * multiplier.toNumber(), this.unsigned);
+
+        // Divide each long into 4 chunks of 16 bits, and then add up 4x4 products.
+        // We can skip products that would overflow.
+
+        var a48 = this.high >>> 16;
+        var a32 = this.high & 0xFFFF;
+        var a16 = this.low >>> 16;
+        var a00 = this.low & 0xFFFF;
+
+        var b48 = multiplier.high >>> 16;
+        var b32 = multiplier.high & 0xFFFF;
+        var b16 = multiplier.low >>> 16;
+        var b00 = multiplier.low & 0xFFFF;
+
+        var c48 = 0, c32 = 0, c16 = 0, c00 = 0;
+        c00 += a00 * b00;
+        c16 += c00 >>> 16;
+        c00 &= 0xFFFF;
+        c16 += a16 * b00;
+        c32 += c16 >>> 16;
+        c16 &= 0xFFFF;
+        c16 += a00 * b16;
+        c32 += c16 >>> 16;
+        c16 &= 0xFFFF;
+        c32 += a32 * b00;
+        c48 += c32 >>> 16;
+        c32 &= 0xFFFF;
+        c32 += a16 * b16;
+        c48 += c32 >>> 16;
+        c32 &= 0xFFFF;
+        c32 += a00 * b32;
+        c48 += c32 >>> 16;
+        c32 &= 0xFFFF;
+        c48 += a48 * b00 + a32 * b16 + a16 * b32 + a00 * b48;
+        c48 &= 0xFFFF;
+        return fromBits((c16 << 16) | c00, (c48 << 16) | c32, this.unsigned);
+    };
+
+    /**
+     * Returns the product of this and the specified Long. This is an alias of {@link Long#multiply}.
+     * @function
+     * @param {!Long|number|string} multiplier Multiplier
+     * @returns {!Long} Product
+     */
+    LongPrototype.mul = LongPrototype.multiply;
+
+    /**
+     * Returns this Long divided by the specified. The result is signed if this Long is signed or
+     *  unsigned if this Long is unsigned.
+     * @param {!Long|number|string} divisor Divisor
+     * @returns {!Long} Quotient
+     */
+    LongPrototype.divide = function divide(divisor) {
+        if (!isLong(divisor))
+            divisor = fromValue(divisor);
+        if (divisor.isZero())
+            throw Error('division by zero');
+        if (this.isZero())
+            return this.unsigned ? UZERO : ZERO;
+        var approx, rem, res;
+        if (!this.unsigned) {
+            // This section is only relevant for signed longs and is derived from the
+            // closure library as a whole.
+            if (this.eq(MIN_VALUE)) {
+                if (divisor.eq(ONE) || divisor.eq(NEG_ONE))
+                    return MIN_VALUE;  // recall that -MIN_VALUE == MIN_VALUE
+                else if (divisor.eq(MIN_VALUE))
+                    return ONE;
+                else {
+                    // At this point, we have |other| >= 2, so |this/other| < |MIN_VALUE|.
+                    var halfThis = this.shr(1);
+                    approx = halfThis.div(divisor).shl(1);
+                    if (approx.eq(ZERO)) {
+                        return divisor.isNegative() ? ONE : NEG_ONE;
+                    } else {
+                        rem = this.sub(divisor.mul(approx));
+                        res = approx.add(rem.div(divisor));
+                        return res;
+                    }
+                }
+            } else if (divisor.eq(MIN_VALUE))
+                return this.unsigned ? UZERO : ZERO;
+            if (this.isNegative()) {
+                if (divisor.isNegative())
+                    return this.neg().div(divisor.neg());
+                return this.neg().div(divisor).neg();
+            } else if (divisor.isNegative())
+                return this.div(divisor.neg()).neg();
+            res = ZERO;
+        } else {
+            // The algorithm below has not been made for unsigned longs. It's therefore
+            // required to take special care of the MSB prior to running it.
+            if (!divisor.unsigned)
+                divisor = divisor.toUnsigned();
+            if (divisor.gt(this))
+                return UZERO;
+            if (divisor.gt(this.shru(1))) // 15 >>> 1 = 7 ; with divisor = 8 ; true
+                return UONE;
+            res = UZERO;
+        }
+
+        // Repeat the following until the remainder is less than other:  find a
+        // floating-point that approximates remainder / other *from below*, add this
+        // into the result, and subtract it from the remainder.  It is critical that
+        // the approximate value is less than or equal to the real value so that the
+        // remainder never becomes negative.
+        rem = this;
+        while (rem.gte(divisor)) {
+            // Approximate the result of division. This may be a little greater or
+            // smaller than the actual value.
+            approx = Math.max(1, Math.floor(rem.toNumber() / divisor.toNumber()));
+
+            // We will tweak the approximate result by changing it in the 48-th digit or
+            // the smallest non-fractional digit, whichever is larger.
+            var log2 = Math.ceil(Math.log(approx) / Math.LN2),
+                delta = (log2 <= 48) ? 1 : pow_dbl(2, log2 - 48),
+
+            // Decrease the approximation until it is smaller than the remainder.  Note
+            // that if it is too large, the product overflows and is negative.
+                approxRes = fromNumber(approx),
+                approxRem = approxRes.mul(divisor);
+            while (approxRem.isNegative() || approxRem.gt(rem)) {
+                approx -= delta;
+                approxRes = fromNumber(approx, this.unsigned);
+                approxRem = approxRes.mul(divisor);
+            }
+
+            // We know the answer can't be zero... and actually, zero would cause
+            // infinite recursion since we would make no progress.
+            if (approxRes.isZero())
+                approxRes = ONE;
+
+            res = res.add(approxRes);
+            rem = rem.sub(approxRem);
+        }
+        return res;
+    };
+
+    /**
+     * Returns this Long divided by the specified. This is an alias of {@link Long#divide}.
+     * @function
+     * @param {!Long|number|string} divisor Divisor
+     * @returns {!Long} Quotient
+     */
+    LongPrototype.div = LongPrototype.divide;
+
+    /**
+     * Returns this Long modulo the specified.
+     * @param {!Long|number|string} divisor Divisor
+     * @returns {!Long} Remainder
+     */
+    LongPrototype.modulo = function modulo(divisor) {
+        if (!isLong(divisor))
+            divisor = fromValue(divisor);
+        return this.sub(this.div(divisor).mul(divisor));
+    };
+
+    /**
+     * Returns this Long modulo the specified. This is an alias of {@link Long#modulo}.
+     * @function
+     * @param {!Long|number|string} divisor Divisor
+     * @returns {!Long} Remainder
+     */
+    LongPrototype.mod = LongPrototype.modulo;
+
+    /**
+     * Returns the bitwise NOT of this Long.
+     * @returns {!Long}
+     */
+    LongPrototype.not = function not() {
+        return fromBits(~this.low, ~this.high, this.unsigned);
+    };
+
+    /**
+     * Returns the bitwise AND of this Long and the specified.
+     * @param {!Long|number|string} other Other Long
+     * @returns {!Long}
+     */
+    LongPrototype.and = function and(other) {
+        if (!isLong(other))
+            other = fromValue(other);
+        return fromBits(this.low & other.low, this.high & other.high, this.unsigned);
+    };
+
+    /**
+     * Returns the bitwise OR of this Long and the specified.
+     * @param {!Long|number|string} other Other Long
+     * @returns {!Long}
+     */
+    LongPrototype.or = function or(other) {
+        if (!isLong(other))
+            other = fromValue(other);
+        return fromBits(this.low | other.low, this.high | other.high, this.unsigned);
+    };
+
+    /**
+     * Returns the bitwise XOR of this Long and the given one.
+     * @param {!Long|number|string} other Other Long
+     * @returns {!Long}
+     */
+    LongPrototype.xor = function xor(other) {
+        if (!isLong(other))
+            other = fromValue(other);
+        return fromBits(this.low ^ other.low, this.high ^ other.high, this.unsigned);
+    };
+
+    /**
+     * Returns this Long with bits shifted to the left by the given amount.
+     * @param {number|!Long} numBits Number of bits
+     * @returns {!Long} Shifted Long
+     */
+    LongPrototype.shiftLeft = function shiftLeft(numBits) {
+        if (isLong(numBits))
+            numBits = numBits.toInt();
+        if ((numBits &= 63) === 0)
+            return this;
+        else if (numBits < 32)
+            return fromBits(this.low << numBits, (this.high << numBits) | (this.low >>> (32 - numBits)), this.unsigned);
+        else
+            return fromBits(0, this.low << (numBits - 32), this.unsigned);
+    };
+
+    /**
+     * Returns this Long with bits shifted to the left by the given amount. This is an alias of {@link Long#shiftLeft}.
+     * @function
+     * @param {number|!Long} numBits Number of bits
+     * @returns {!Long} Shifted Long
+     */
+    LongPrototype.shl = LongPrototype.shiftLeft;
+
+    /**
+     * Returns this Long with bits arithmetically shifted to the right by the given amount.
+     * @param {number|!Long} numBits Number of bits
+     * @returns {!Long} Shifted Long
+     */
+    LongPrototype.shiftRight = function shiftRight(numBits) {
+        if (isLong(numBits))
+            numBits = numBits.toInt();
+        if ((numBits &= 63) === 0)
+            return this;
+        else if (numBits < 32)
+            return fromBits((this.low >>> numBits) | (this.high << (32 - numBits)), this.high >> numBits, this.unsigned);
+        else
+            return fromBits(this.high >> (numBits - 32), this.high >= 0 ? 0 : -1, this.unsigned);
+    };
+
+    /**
+     * Returns this Long with bits arithmetically shifted to the right by the given amount. This is an alias of {@link Long#shiftRight}.
+     * @function
+     * @param {number|!Long} numBits Number of bits
+     * @returns {!Long} Shifted Long
+     */
+    LongPrototype.shr = LongPrototype.shiftRight;
+
+    /**
+     * Returns this Long with bits logically shifted to the right by the given amount.
+     * @param {number|!Long} numBits Number of bits
+     * @returns {!Long} Shifted Long
+     */
+    LongPrototype.shiftRightUnsigned = function shiftRightUnsigned(numBits) {
+        if (isLong(numBits))
+            numBits = numBits.toInt();
+        numBits &= 63;
+        if (numBits === 0)
+            return this;
+        else {
+            var high = this.high;
+            if (numBits < 32) {
+                var low = this.low;
+                return fromBits((low >>> numBits) | (high << (32 - numBits)), high >>> numBits, this.unsigned);
+            } else if (numBits === 32)
+                return fromBits(high, 0, this.unsigned);
+            else
+                return fromBits(high >>> (numBits - 32), 0, this.unsigned);
+        }
+    };
+
+    /**
+     * Returns this Long with bits logically shifted to the right by the given amount. This is an alias of {@link Long#shiftRightUnsigned}.
+     * @function
+     * @param {number|!Long} numBits Number of bits
+     * @returns {!Long} Shifted Long
+     */
+    LongPrototype.shru = LongPrototype.shiftRightUnsigned;
+
+    /**
+     * Converts this Long to signed.
+     * @returns {!Long} Signed long
+     */
+    LongPrototype.toSigned = function toSigned() {
+        if (!this.unsigned)
+            return this;
+        return fromBits(this.low, this.high, false);
+    };
+
+    /**
+     * Converts this Long to unsigned.
+     * @returns {!Long} Unsigned long
+     */
+    LongPrototype.toUnsigned = function toUnsigned() {
+        if (this.unsigned)
+            return this;
+        return fromBits(this.low, this.high, true);
+    };
+
+    /**
+     * Converts this Long to its byte representation.
+     * @param {boolean=} le Whether little or big endian, defaults to big endian
+     * @returns {!Array.<number>} Byte representation
+     */
+    LongPrototype.toBytes = function(le) {
+        return le ? this.toBytesLE() : this.toBytesBE();
+    }
+
+    /**
+     * Converts this Long to its little endian byte representation.
+     * @returns {!Array.<number>} Little endian byte representation
+     */
+    LongPrototype.toBytesLE = function() {
+        var hi = this.high,
+            lo = this.low;
+        return [
+             lo         & 0xff,
+            (lo >>>  8) & 0xff,
+            (lo >>> 16) & 0xff,
+            (lo >>> 24) & 0xff,
+             hi         & 0xff,
+            (hi >>>  8) & 0xff,
+            (hi >>> 16) & 0xff,
+            (hi >>> 24) & 0xff
+        ];
+    }
+
+    /**
+     * Converts this Long to its big endian byte representation.
+     * @returns {!Array.<number>} Big endian byte representation
+     */
+    LongPrototype.toBytesBE = function() {
+        var hi = this.high,
+            lo = this.low;
+        return [
+            (hi >>> 24) & 0xff,
+            (hi >>> 16) & 0xff,
+            (hi >>>  8) & 0xff,
+             hi         & 0xff,
+            (lo >>> 24) & 0xff,
+            (lo >>> 16) & 0xff,
+            (lo >>>  8) & 0xff,
+             lo         & 0xff
+        ];
+    }
+    return Long;
+});

src/config.js

@@ -66,12 +66,18 @@ require.config({
         "xss":                      "node_modules/xss/dist/xss",
         "xss.noconflict":           "src/xss.noconflict",
 
+        // OMEMO/libsignal requirements
+        "Long":                     "3rdparty/long",
+        "protobuf":                 "3rdparty/protobuf",
+        "bytebuffer":               "3rdparty/bytebuffer",
+        "libsignal":                "3rdparty/libsignal-protocol-javascript/dist/libsignal-protocol",
+
         // Converse
         "converse":                 "src/converse",
 
         "converse-bookmarks":       "src/converse-bookmarks",
+        "converse-caps":            "src/converse-caps",
         "converse-chatboxes":       "src/converse-chatboxes",
-        "converse-caps":           "src/converse-caps",
         "converse-chatview":        "src/converse-chatview",
         "converse-controlbox":      "src/converse-controlbox",
         "converse-core":            "src/converse-core",
@@ -87,6 +93,7 @@ require.config({
         "converse-muc":             "src/converse-muc",
         "converse-muc-views":       "src/converse-muc-views",
         "converse-notification":    "src/converse-notification",
+        "converse-omemo":           "src/converse-omemo",
         "converse-otr":             "src/converse-otr",
         "converse-ping":            "src/converse-ping",
         "converse-profile":         "src/converse-profile",

src/converse-omemo.js

@@ -4,13 +4,13 @@
 // Copyright (c) 2013-2018, the Converse.js developers
 // Licensed under the Mozilla Public License (MPLv2)
 
-/*global libsignal */
 (function (root, factory) {
     define([
         "converse-core",
-        "tpl!toolbar_omemo"
+        "tpl!toolbar_omemo",
+        "libsignal"
     ], factory);
-}(this, function (converse, tpl_toolbar_omemo) {
+}(this, function (converse, tpl_toolbar_omemo, libsignal) {
 
     const { Backbone, Promise, Strophe, sizzle, $build, _, b64_sha1 } = converse.env;
 
@@ -25,10 +25,6 @@
 
     converse.plugins.add('converse-omemo', {
 
-        enabled (_converse) {
-            return !_.isNil(window.libsignal);
-        },
-
         overrides: {
             ChatBoxView:  {