Class/protocols/preprocess (#293)

* preprocess bits done

* preprocess numbers done

lib/client/api/protocols.js

@@ -1,9 +1,12 @@
-const numbers = require('../protocols/preprocessing/numbers.js');
-const bits = require('../protocols/preprocessing/bits.js');
+const _numbers = require('../protocols/preprocessing/numbers.js');
+const _bits = require('../protocols/preprocessing/bits.js');
 const triplets = require('../protocols/preprocessing/triplets.js');
 const quotients = require('../protocols/preprocessing/quotients.js');
 const sampling = require('../protocols/preprocessing/sampling.js');
 
+const numbers = new _numbers();
+const bits = new _bits();
+
 /**
  * Contains miscellaneous protocols (mostly used in preprocessing)
  * @name protocols

lib/client/protocols/preprocessing/bits.js

@@ -1,4 +1,4 @@
-module.exports = {
+class ProprocessBits {
   /**
    * Generates a random bit under MPC by xoring all bits sent by participating parties using smult / beaver triples
    * @function generate_random_bit_bgw
@@ -14,7 +14,7 @@ module.exports = {
    *                               - compute_threshold: the threshold to use during computation: defaults to compute_list.length
    * @return {Object} contains 'share' (this party's share of the generated bit) and 'promise'
    */
-  generate_random_bit_smult: function (jiff, threshold, receivers_list, compute_list, Zp, params) {
+  generate_random_bit_smult(jiff, threshold, receivers_list, compute_list, Zp, params) {
     if (params.compute_threshold == null) {
       params.compute_threshold = threshold;
     }
@@ -48,7 +48,7 @@ module.exports = {
       promise = random_bit.value;
     }
     return { share: random_bit, promise: promise };
-  },
+  }
   /**
    * Generates a random bit under MPC by xoring all bits sent by participating parties using smult_bgw
    * @function generate_random_bit_bgw
@@ -64,7 +64,7 @@ module.exports = {
    *                               - compute_threshold: the threshold to use during computation: defaults to compute_list.length
    * @return {Object} contains 'share' (this party's share of the generated bit) and 'promise'
    */
-  generate_random_bit_bgw: function (jiff, threshold, receivers_list, compute_list, Zp, params) {
+  generate_random_bit_bgw(jiff, threshold, receivers_list, compute_list, Zp, params) {
     if (params.compute_threshold == null) {
       params.compute_threshold = Math.floor((compute_list.length + 1) / 2); // honest majority BGW
     }
@@ -99,7 +99,7 @@ module.exports = {
       promise = random_bit.value;
     }
     return { share: random_bit, promise: promise };
-  },
+  }
   /**
    * Generates a sequence of random bits under MPC
    * @function generate_random_bits
@@ -118,7 +118,7 @@ module.exports = {
    * @param {object} protocols - the protocols to use for preprocessing
    * @return {Object} contains 'share' (array of secret shares bits) and 'promise'
    */
-  generate_random_bits: function (jiff, threshold, receivers_list, compute_list, Zp, params, protocols) {
+  generate_random_bits(jiff, threshold, receivers_list, compute_list, Zp, params, protocols) {
     if (params.count == null) {
       params.count = 1;
     }
@@ -151,4 +151,6 @@ module.exports = {
     }
     return { share: bits, promise: Promise.all(promises) };
   }
-};
+}
+
+module.exports = ProprocessBits;

lib/client/protocols/preprocessing/numbers.js

@@ -48,7 +48,7 @@ const jiff_share_all_number = function (jiff, n, threshold, receivers_list, comp
   return { share: result, promise: promise };
 };
 
-module.exports = {
+class PreprocessNumber {
   /**
    * Creates shares of an unknown random number. Every party comes up with its own random number and shares it.
    * Then every party combines all the received shares to construct one share of the random unknown number
@@ -65,14 +65,14 @@ module.exports = {
    *                               - compute_threshold: the threshold to use during computation: defaults to compute_list.length
    * @return {Object} contains 'share' (this party's share of the result) and 'promise'
    */
-  generate_random_number: function (jiff, threshold, receivers_list, compute_list, Zp, params) {
+  generate_random_number = (jiff, threshold, receivers_list, compute_list, Zp, params) => {
     if (params.op_id == null && params.output_op_id == null) {
       params.op_id = jiff.counters.gen_op_id2('generate_random_number', receivers_list, compute_list);
     } else if (params.op_id == null) {
       params.op_id = 'preprocessing:' + params.output_op_id + ':' + compute_list.join(',');
     }
     return jiff_share_all_number(jiff, jiff.helpers.random(Zp), threshold, receivers_list, compute_list, Zp, params);
-  },
+  };
   /**
    * Creates shares of 0, such that no party knows the other parties' shares.
    * Every party secret shares 0, then every party sums all the shares they received, resulting
@@ -90,12 +90,13 @@ module.exports = {
    *                               - compute_threshold: the threshold to use during computation: defaults to compute_list.length
    * @return {Object} contains 'share' (this party's share of the result) and 'promise'
    */
-  generate_zero: function (jiff, threshold, receivers_list, compute_list, Zp, params) {
+  generate_zero = (jiff, threshold, receivers_list, compute_list, Zp, params) => {
     if (params.op_id == null && params.output_op_id == null) {
       params.op_id = jiff.counters.gen_op_id2('generate_zero', receivers_list, compute_list);
     } else if (params.op_id == null) {
       params.op_id = 'preprocessing:' + params.output_op_id + ':' + compute_list.join(',');
     }
     return jiff_share_all_number(jiff, 0, threshold, receivers_list, compute_list, Zp, params);
-  }
-};
+  };
+}
+module.exports = PreprocessNumber;