/* * Copyright 2018 Scytl Secure Electronic Voting SA * * All rights reserved * * See our extended copyright notice in *file 'Copyright.txt' which is part of this source code package */ /* jshint node:true */ 'use strict'; var ExponentiationProofTestData = require('./data/exponentiation-proof-data'); var cryptoPolicy = require('scytl-cryptopolicy'); var zkProof = require('../lib/index'); var messageDigest = require('scytl-messagedigest'); var mathematical = require('scytl-mathematical'); var secureRandom = require('scytl-securerandom'); var codec = require('scytl-codec'); describe('The zero-knowledge proof module should be able to ...', function() { var proofService_; var group_; var anotherGroup_; var secret_; var anotherSecret_; var baseElements_; var otherBaseElements_; var exponentiatedElements_; var otherExponentiatedElements_; var data_; var otherData_; var proofHandler_; var proof_; var preComputation_; beforeAll(function() { proofService_ = zkProof.newService(); var testData = new ExponentiationProofTestData(); group_ = testData.getGroup(); anotherGroup_ = testData.getAnotherGroup(); secret_ = testData.getSecret(); anotherSecret_ = testData.getAnotherSecret(); baseElements_ = testData.getBaseElements(); otherBaseElements_ = testData.getOtherBaseElements(); exponentiatedElements_ = testData.getExponentiatedElements(); otherExponentiatedElements_ = testData.getOtherExponentiatedElements(); data_ = testData.getStringData(); otherData_ = testData.getOtherStringData(); proofHandler_ = proofService_.newExponentiationProofHandler(group_).init(baseElements_); proof_ = proofHandler_.generate(secret_, exponentiatedElements_); preComputation_ = proofHandler_.preCompute(); }); describe('create a zero-knowledge proof service that should be able to ..', function() { describe('create an exponentiation proof handler that should be able to', function() { it('generate and verify an exponentiation proof', function() { var verified = proofHandler_.verify(proof_, exponentiatedElements_); expect(verified).toBeTruthy(); }); it('generate and verify an exponentiation proof, using a specified cryptographic policy', function() { var policy = cryptoPolicy.newInstance(); policy.proofs.messageDigest.algorithm = cryptoPolicy.options.proofs.messageDigest.algorithm.SHA512_224; var proofService = zkProof.newService({policy: policy}); var proofHandler = proofService.newExponentiationProofHandler(group_).init( baseElements_); var proof = proofHandler.generate(secret_, exponentiatedElements_); var verified = proofHandler.verify(proof, exponentiatedElements_); expect(verified).toBeTruthy(); }); it('generate and verify an exponentiation proof, using a specified message digest service object', function() { var policy = cryptoPolicy.newInstance(); policy.proofs.messageDigest.algorithm = cryptoPolicy.options.proofs.messageDigest.algorithm.SHA512_224; var messageDigestService = messageDigest.newService({policy: policy}); var proofService = zkProof.newService({messageDigestService: messageDigestService}); var proofHandler = proofService.newExponentiationProofHandler(group_).init( baseElements_); var proof = proofHandler.generate(secret_, exponentiatedElements_); var verified = proofHandler.verify(proof, exponentiatedElements_); expect(verified).toBeTruthy(); }); it('generate and verify an exponentiation proof, using a specified secure random service object', function() { var proofService = zkProof.newService( {secureRandomService: secureRandom.newService()}); var proofHandler = proofService.newExponentiationProofHandler(group_).init( baseElements_); var proof = proofHandler.generate(secret_, exponentiatedElements_); var verified = proofHandler.verify(proof, exponentiatedElements_); expect(verified).toBeTruthy(); }); it('generate and verify an exponentiation proof, using a specified mathematical service object', function() { var proofService = zkProof.newService( {mathematicalService: mathematical.newService()}); var proofHandler = proofService.newExponentiationProofHandler(group_).init( baseElements_); var proof = proofHandler.generate(secret_, exponentiatedElements_); var verified = proofHandler.verify(proof, exponentiatedElements_); expect(verified).toBeTruthy(); }); it('generate and verify a plaintext proof, using provided auxiliary data', function() { // Data as string. var proof = proofHandler_.generate( secret_, exponentiatedElements_, {data: data_}); var verified = proofHandler_.verify( proof, exponentiatedElements_, {data: data_}); expect(verified).toBeTruthy(); // Data as bytes. proof = proofHandler_.generate( secret_, exponentiatedElements_, {data: codec.utf8Encode(data_)}); verified = proofHandler_.verify( proof, exponentiatedElements_, {data: codec.utf8Encode(data_)}); expect(verified).toBeTruthy(); }); it('generate and verify an exponentiation proof, using a pre-computation', function() { var proof = proofHandler_.generate( secret_, exponentiatedElements_, {preComputation: preComputation_}); var verified = proofHandler_.verify(proof, exponentiatedElements_); expect(verified).toBeTruthy(); }); it('generate and verify an exponentiation proof, using empty string auxiliary data', function() { var proof = proofHandler_.generate( secret_, exponentiatedElements_, {data: ''}); var verified = proofHandler_.verify(proof, exponentiatedElements_, {data: ''}); expect(verified).toBeTruthy(); }); it('pre-compute, generate and verify a plaintext proof, using method chaining', function() { var preComputation = proofService_.newExponentiationProofHandler(group_) .init(baseElements_) .preCompute(); var proof = proofService_.newExponentiationProofHandler(group_) .init(baseElements_) .generate( secret_, exponentiatedElements_, {data: data_, preComputation: preComputation}); var verified = proofService_.newExponentiationProofHandler(group_) .init(baseElements_) .verify(proof, exponentiatedElements_, {data: data_}); expect(verified).toBeTruthy(); }); it('create a new exponentiation ZeroKnowledgeProof object', function() { var hash = proof_.hash; var values = proof_.values; var proof = proofService_.newProof(hash, values); var verified = proofHandler_.verify(proof, exponentiatedElements_); expect(verified).toBeTruthy(); }); it('create a new exponentiation ZeroKnowledgeProofPreComputation object', function() { var exponents = preComputation_.exponents; var phiOutputs = preComputation_.phiOutputs; var preComputation = proofService_.newPreComputation(exponents, phiOutputs); var proof = proofHandler_.generate( secret_, exponentiatedElements_, {preComputation: preComputation}); var verified = proofHandler_.verify(proof, exponentiatedElements_); expect(verified).toBeTruthy(); }); it('serialize and deserialize an exponentiation proof', function() { var proofJson = proof_.toJson(); var proof = proofService_.newProof(proofJson); var verified = proofHandler_.verify(proof, exponentiatedElements_); expect(verified).toBeTruthy(); }); it('serialize and deserialize an exponentiation proof pre-computation', function() { var preComputationJson = preComputation_.toJson(); var preComputation = proofService_.newPreComputation(preComputationJson); var proof = proofHandler_.generate( secret_, exponentiatedElements_, {preComputation: preComputation}); var verified = proofHandler_.verify(proof, exponentiatedElements_); expect(verified).toBeTruthy(); }); it('fail to verify an exponentiation proof that was generated with a secret not used to exponentiate', function() { var proof = proofHandler_.generate(anotherSecret_, exponentiatedElements_); var verified = proofHandler_.verify(proof, exponentiatedElements_); expect(verified).toBeFalsy(); }); it('fail to verify an exponentiation proof that was generated with base elements not used to exponentiate', function() { proofHandler_.init(otherBaseElements_); var proof = proofHandler_.generate(secret_, exponentiatedElements_); var verified = proofHandler_.verify(proof, exponentiatedElements_); expect(verified).toBeFalsy(); }); it('fail to verify an exponentiation proof that was generated with base elements exponentiated to another secret', function() { var proof = proofHandler_.generate(secret_, otherExponentiatedElements_); var verified = proofHandler_.verify(proof, otherExponentiatedElements_); expect(verified).toBeFalsy(); }); it('fail to verify an exponentiation proof when using base elements not used to exponentiate', function() { var verified = proofHandler_.init(otherBaseElements_) .verify(proof_, exponentiatedElements_); expect(verified).toBeFalsy(); }); it('fail to verify an exponentiation proof when using elements exponentiated to the wrong secret', function() { var verified = proofHandler_.verify(proof_, otherExponentiatedElements_); expect(verified).toBeFalsy(); }); it('fail to verify an exponentiation proof when using the wrong data', function() { var proof = proofHandler_.generate( secret_, exponentiatedElements_, {data: data_}); var verified = proofHandler_.verify( proof, exponentiatedElements_, {data: otherData_}); expect(verified).toBeFalsy(); }); it('throw an error when generating a proof before the handler has been initialized with base elements', function() { var proofHandler = proofService_.newExponentiationProofHandler(group_); expect(function() { proofHandler.generate(secret_, exponentiatedElements_); }).toThrow(); }); it('throw an error when pre-computing a proof before the handler has been initialized with base elements', function() { var proofHandler = proofService_.newExponentiationProofHandler(group_); expect(function() { proofHandler.preCompute(); }).toThrow(); }); it('throw an error when verifying a proof before the handler has been initialized with base elements', function() { var proofHandler = proofService_.newExponentiationProofHandler(group_); expect(function() { proofHandler.verify(proof_, exponentiatedElements_); }).toThrow(); }); }); }); });