/* * 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 PlaintextExponentEqualityProofTestData = require('./data/plaintext-exponent-equality-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 firstSecret_; var secondSecret_; var anotherFirstSecret_; var anotherSecondSecret_; var baseElements_; var otherBaseElements_; var ciphertext_; var anotherCiphertext_; var data_; var otherData_; var proofHandler_; var proof_; var preComputation_; beforeAll(function() { proofService_ = zkProof.newService(); var testData = new PlaintextExponentEqualityProofTestData(); group_ = testData.getGroup(); firstSecret_ = testData.getFirstSecret(); secondSecret_ = testData.getSecondSecret(); anotherFirstSecret_ = testData.getAnotherFirstSecret(); anotherSecondSecret_ = testData.getAnotherSecondSecret(); baseElements_ = testData.getBaseElements(); otherBaseElements_ = testData.getOtherBaseElements(); ciphertext_ = testData.getCiphertext(); anotherCiphertext_ = testData.getAnotherCiphertext(); data_ = testData.getStringData(); otherData_ = testData.getOtherStringData(); proofHandler_ = proofService_.newPlaintextExponentEqualityProofHandler(group_).init( baseElements_); proof_ = proofHandler_.generate(firstSecret_, secondSecret_, ciphertext_); preComputation_ = proofHandler_.preCompute(); }); beforeEach(function() { proofHandler_ = proofService_.newPlaintextExponentEqualityProofHandler(group_).init( baseElements_); }); describe('create a zero-knowledge proof service that should be able to ..', function() { describe('create a plaintext exponent equality proof handler that should be able to', function() { it('generate and verify a plaintext exponent equality proof', function() { var verified = proofHandler_.verify(proof_, ciphertext_); expect(verified).toBeTruthy(); }); it('generate and verify a plaintext exponent equality 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.newPlaintextExponentEqualityProofHandler(group_) .init(baseElements_); proof_ = proofHandler.generate(firstSecret_, secondSecret_, ciphertext_); var verified = proofHandler.verify(proof_, ciphertext_); expect(verified).toBeTruthy(); }); it('generate and verify a plaintext exponent equality 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.newPlaintextExponentEqualityProofHandler(group_) .init(baseElements_); proof_ = proofHandler.generate(firstSecret_, secondSecret_, ciphertext_); var verified = proofHandler.verify(proof_, ciphertext_); expect(verified).toBeTruthy(); }); it('generate and verify a plaintext exponent equality proof, using a specified secure random service object', function() { var proofService = zkProof.newService( {secureRandomService: secureRandom.newService()}); var proofHandler = proofService.newPlaintextExponentEqualityProofHandler(group_) .init(baseElements_); proof_ = proofHandler.generate(firstSecret_, secondSecret_, ciphertext_); var verified = proofHandler.verify(proof_, ciphertext_); expect(verified).toBeTruthy(); }); it('generate and verify a plaintext exponent equality proof, using a specified mathematical service object', function() { var proofService = zkProof.newService( {mathematicalService: mathematical.newService()}); var proofHandler = proofService.newPlaintextExponentEqualityProofHandler(group_) .init(baseElements_); proof_ = proofHandler.generate(firstSecret_, secondSecret_, ciphertext_); var verified = proofHandler.verify(proof_, ciphertext_); expect(verified).toBeTruthy(); }); it('generate and verify a plaintext proof, using provided auxiliary data', function() { // Data as string. var proof = proofHandler_.generate( firstSecret_, secondSecret_, ciphertext_, {data: data_}); var verified = proofHandler_.verify(proof, ciphertext_, {data: data_}); expect(verified).toBeTruthy(); // Data as bytes. proof = proofHandler_.generate( firstSecret_, secondSecret_, ciphertext_, {data: codec.utf8Encode(data_)}); verified = proofHandler_.verify( proof, ciphertext_, {data: codec.utf8Encode(data_)}); expect(verified).toBeTruthy(); }); it('generate and verify a plaintext exponent equality proof, using a pre-computation', function() { var proof = proofHandler_.generate( firstSecret_, secondSecret_, ciphertext_, {preComputation: preComputation_}); var verified = proofHandler_.verify(proof, ciphertext_); expect(verified).toBeTruthy(); }); it('generate and verify a plaintext exponent equality proof, using empty auxiliary data', function() { var proof = proofHandler_.generate( firstSecret_, secondSecret_, ciphertext_, {data: ''}); var verified = proofHandler_.verify(proof, ciphertext_, {data: ''}); expect(verified).toBeTruthy(); }); it('pre-compute, generate and verify a plaintext exponent equality proof, using method chaining', function() { var preComputation = proofService_.newPlaintextExponentEqualityProofHandler(group_) .init(baseElements_) .preCompute(); var proof = proofService_.newPlaintextExponentEqualityProofHandler(group_) .init(baseElements_) .generate( firstSecret_, secondSecret_, ciphertext_, {data: data_, preComputation: preComputation}); var verified = proofService_.newPlaintextExponentEqualityProofHandler(group_) .init(baseElements_) .verify(proof, ciphertext_, {data: data_}); expect(verified).toBeTruthy(); }); it('create a new plaintext exponent equality ZeroKnowledgeProof object', function() { var hash = proof_.hash; var values = proof_.values; var proof = proofService_.newProof(hash, values); var verified = proofHandler_.verify(proof, ciphertext_); expect(verified).toBeTruthy(); }); it('create a new plaintext exponent equality ZeroKnowledgeProofPreComputation object', function() { var exponents = preComputation_.exponents; var phiOutputs = preComputation_.phiOutputs; var preComputation = proofService_.newPreComputation(exponents, phiOutputs); var proof = proofHandler_.generate( firstSecret_, secondSecret_, ciphertext_, {preComputation: preComputation}); var verified = proofHandler_.verify(proof, ciphertext_); expect(verified).toBeTruthy(); }); it('serialize and deserialize a plaintext exponent equality proof', function() { var proofJson = proof_.toJson(); var proof = proofService_.newProof(proofJson); var verified = proofHandler_.verify(proof, ciphertext_); expect(verified).toBeTruthy(); }); it('serialize and deserialize a plaintext exponent equality proof pre-computation', function() { var preComputationJson = preComputation_.toJson(); var preComputation = proofService_.newPreComputation(preComputationJson); var proof = proofHandler_.generate( firstSecret_, secondSecret_, ciphertext_, {preComputation: preComputation}); var verified = proofHandler_.verify(proof, ciphertext_); expect(verified).toBeTruthy(); }); it('fail to verify a plaintext exponent equality proof that was generated with a first secret not used to generate the ciphertext', function() { var proof = proofHandler_.generate( anotherFirstSecret_, secondSecret_, ciphertext_); var verified = proofHandler_.verify(proof, ciphertext_); expect(verified).toBeFalsy(); }); it('fail to verify a plaintext exponent equality proof that was generated with a second secret not used to generate the ciphertext', function() { var proof = proofHandler_.generate( firstSecret_, anotherSecondSecret_, ciphertext_); var verified = proofHandler_.verify(proof, ciphertext_); expect(verified).toBeFalsy(); }); it('fail to verify a plaintext exponent equality proof that was generated with base elements not used to generate the ciphertext', function() { proofHandler_.init(otherBaseElements_); var proof = proofHandler_.generate(firstSecret_, secondSecret_, ciphertext_); var verified = proofHandler_.verify(proof, ciphertext_); expect(verified).toBeFalsy(); }); it('fail to verify a plaintext exponent equality proof that was generated with ciphertext not generated from the base elements', function() { var proof = proofHandler_.generate( firstSecret_, secondSecret_, anotherCiphertext_); var verified = proofHandler_.verify(proof, anotherCiphertext_); expect(verified).toBeFalsy(); }); it('fail to verify a plaintext exponent equality proof when using base elements not used to generate the proof', function() { var verified = proofHandler_.init(otherBaseElements_) .verify(proof_, ciphertext_); expect(verified).toBeFalsy(); }); it('fail to verify a plaintext exponent equality proof when using ciphertext not used to generate the proof', function() { var verified = proofHandler_.verify(proof_, anotherCiphertext_); expect(verified).toBeFalsy(); }); it('fail to verify a plaintext exponent equality proof when using auxiliary data not used to generate the proof', function() { var proof = proofHandler_.generate( firstSecret_, secondSecret_, ciphertext_, {data: data_}); var verified = proofHandler_.verify(proof, ciphertext_, {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_.newPlaintextExponentEqualityProofHandler(group_); expect(function() { proofHandler.generate(firstSecret_, secondSecret_, ciphertext_); }).toThrow(); }); it('throw an error when pre-computing a proof before the handler has been initialized with base elements', function() { var proofHandler = proofService_.newPlaintextExponentEqualityProofHandler(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_.newPlaintextExponentEqualityProofHandler(group_); expect(function() { proofHandler.verify(proof_, ciphertext_); }).toThrow(); }); }); }); });