mirror of
https://github.com/servo/servo
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Update web-platform-tests to revision b'468d01bbd84da2babf265c6af46947be68713440'
This commit is contained in:
WPT Sync Bot
@@ -0,0 +1,507 @@
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// META: title=WebCryptoAPI: wrapKey() and unwrapKey()
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// META: timeout=long
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// Tests for wrapKey and unwrapKey round tripping
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var subtle = self.crypto.subtle;
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var wrappers = []; // Things we wrap (and upwrap) keys with
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var keys = []; // Things to wrap and unwrap
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var ecdhPeerKey; // ECDH peer public key needed for non-extractable ECDH key comparison
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// Generate all the keys needed, then iterate over all combinations
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// to test wrapping and unwrapping.
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promise_test(function() {
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return Promise.all([generateWrappingKeys(), generateKeysToWrap(), generateEcdhPeerKey()])
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.then(function(results) {
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var promises = [];
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wrappers.forEach(function(wrapper) {
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keys.forEach(function(key) {
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promises.push(testWrapping(wrapper, key));
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})
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});
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return Promise.all(promises);
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});
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}, "setup");
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function generateWrappingKeys() {
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// There are five algorithms that can be used for wrapKey/unwrapKey.
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// Generate one key with typical parameters for each kind.
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//
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// Note: we don't need cryptographically strong parameters for things
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// like IV - just any legal value will do.
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var parameters = [
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{
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name: "RSA-OAEP",
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generateParameters: {name: "RSA-OAEP", modulusLength: 4096, publicExponent: new Uint8Array([1,0,1]), hash: "SHA-256"},
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wrapParameters: {name: "RSA-OAEP", label: new Uint8Array(8)}
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},
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{
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name: "AES-CTR",
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generateParameters: {name: "AES-CTR", length: 128},
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wrapParameters: {name: "AES-CTR", counter: new Uint8Array(16), length: 64}
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},
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{
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name: "AES-CBC",
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generateParameters: {name: "AES-CBC", length: 128},
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wrapParameters: {name: "AES-CBC", iv: new Uint8Array(16)}
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},
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{
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name: "AES-GCM",
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generateParameters: {name: "AES-GCM", length: 128},
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wrapParameters: {name: "AES-GCM", iv: new Uint8Array(16), additionalData: new Uint8Array(16), tagLength: 64}
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},
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{
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name: "AES-KW",
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generateParameters: {name: "AES-KW", length: 128},
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wrapParameters: {name: "AES-KW"}
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}
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];
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return Promise.all(parameters.map(function(params) {
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return subtle.generateKey(params.generateParameters, true, ["wrapKey", "unwrapKey"])
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.then(function(key) {
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var wrapper;
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if (params.name === "RSA-OAEP") { // we have a key pair, not just a key
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wrapper = {wrappingKey: key.publicKey, unwrappingKey: key.privateKey, parameters: params};
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} else {
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wrapper = {wrappingKey: key, unwrappingKey: key, parameters: params};
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}
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wrappers.push(wrapper);
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return true;
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})
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}));
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}
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function generateKeysToWrap() {
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var parameters = [
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{algorithm: {name: "RSASSA-PKCS1-v1_5", modulusLength: 1024, publicExponent: new Uint8Array([1,0,1]), hash: "SHA-256"}, privateUsages: ["sign"], publicUsages: ["verify"]},
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{algorithm: {name: "RSA-PSS", modulusLength: 1024, publicExponent: new Uint8Array([1,0,1]), hash: "SHA-256"}, privateUsages: ["sign"], publicUsages: ["verify"]},
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{algorithm: {name: "RSA-OAEP", modulusLength: 1024, publicExponent: new Uint8Array([1,0,1]), hash: "SHA-256"}, privateUsages: ["decrypt"], publicUsages: ["encrypt"]},
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{algorithm: {name: "ECDSA", namedCurve: "P-256"}, privateUsages: ["sign"], publicUsages: ["verify"]},
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{algorithm: {name: "ECDH", namedCurve: "P-256"}, privateUsages: ["deriveBits"], publicUsages: []},
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{algorithm: {name: "AES-CTR", length: 128}, usages: ["encrypt", "decrypt"]},
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{algorithm: {name: "AES-CBC", length: 128}, usages: ["encrypt", "decrypt"]},
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{algorithm: {name: "AES-GCM", length: 128}, usages: ["encrypt", "decrypt"]},
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{algorithm: {name: "AES-KW", length: 128}, usages: ["wrapKey", "unwrapKey"]},
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{algorithm: {name: "HMAC", length: 128, hash: "SHA-256"}, usages: ["sign", "verify"]}
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];
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return Promise.all(parameters.map(function(params) {
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var usages;
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if ("usages" in params) {
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usages = params.usages;
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} else {
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usages = params.publicUsages.concat(params.privateUsages);
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}
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return subtle.generateKey(params.algorithm, true, usages)
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.then(function(result) {
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if (result.constructor === CryptoKey) {
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keys.push({name: params.algorithm.name, algorithm: params.algorithm, usages: params.usages, key: result});
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} else {
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keys.push({name: params.algorithm.name + " public key", algorithm: params.algorithm, usages: params.publicUsages, key: result.publicKey});
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keys.push({name: params.algorithm.name + " private key", algorithm: params.algorithm, usages: params.privateUsages, key: result.privateKey});
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}
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return true;
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});
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}));
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}
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function generateEcdhPeerKey() {
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return subtle.generateKey({name: "ECDH", namedCurve: "P-256"},true,["deriveBits"])
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.then(function(result){
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ecdhPeerKey = result.publicKey;
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});
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}
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// Can we successfully "round-trip" (wrap, then unwrap, a key)?
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function testWrapping(wrapper, toWrap) {
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var formats;
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if (toWrap.name.includes("private")) {
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formats = ["pkcs8", "jwk"];
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} else if (toWrap.name.includes("public")) {
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formats = ["spki", "jwk"]
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} else {
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formats = ["raw", "jwk"]
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}
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return Promise.all(formats.map(function(fmt) {
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var originalExport;
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return subtle.exportKey(fmt, toWrap.key).then(function(exportedKey) {
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originalExport = exportedKey;
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if (wrappingIsPossible(originalExport, wrapper.parameters.name)) {
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promise_test(function(test) {
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return subtle.wrapKey(fmt, toWrap.key, wrapper.wrappingKey, wrapper.parameters.wrapParameters)
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.then(function(wrappedResult) {
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return subtle.unwrapKey(fmt, wrappedResult, wrapper.unwrappingKey, wrapper.parameters.wrapParameters, toWrap.algorithm, true, toWrap.usages);
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}).then(function(unwrappedResult) {
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assert_true(unwrappedResult.extractable, "Unwrapped result is extractable");
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return subtle.exportKey(fmt, unwrappedResult)
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}).then(function(roundTripExport) {
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assert_true(equalExport(originalExport, roundTripExport), "Post-wrap export matches original export");
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}, function(err) {
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assert_unreached("Round trip for extractable key threw an error - " + err.name + ': "' + err.message + '"');
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});
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}, "Can wrap and unwrap " + toWrap.name + " keys using " + fmt + " and " + wrapper.parameters.name);
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if (canCompareNonExtractableKeys(toWrap.key)) {
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promise_test(function(test){
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return subtle.wrapKey(fmt, toWrap.key, wrapper.wrappingKey, wrapper.parameters.wrapParameters)
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.then(function(wrappedResult) {
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return subtle.unwrapKey(fmt, wrappedResult, wrapper.unwrappingKey, wrapper.parameters.wrapParameters, toWrap.algorithm, false, toWrap.usages);
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}).then(function(unwrappedResult){
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assert_false(unwrappedResult.extractable, "Unwrapped result is non-extractable");
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return equalKeys(toWrap.key, unwrappedResult);
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}).then(function(result){
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assert_true(result, "Unwrapped key matches original");
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}).catch(function(err){
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assert_unreached("Round trip for key unwrapped non-extractable threw an error - " + err.name + ': "' + err.message + '"');
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});
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}, "Can wrap and unwrap " + toWrap.name + " keys as non-extractable using " + fmt + " and " + wrapper.parameters.name);
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if (fmt === "jwk") {
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promise_test(function(test){
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var wrappedKey;
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return wrapAsNonExtractableJwk(toWrap.key,wrapper).then(function(wrappedResult){
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wrappedKey = wrappedResult;
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return subtle.unwrapKey("jwk", wrappedKey, wrapper.unwrappingKey, wrapper.parameters.wrapParameters, toWrap.algorithm, false, toWrap.usages);
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}).then(function(unwrappedResult){
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assert_false(unwrappedResult.extractable, "Unwrapped key is non-extractable");
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return equalKeys(toWrap.key,unwrappedResult);
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}).then(function(result){
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assert_true(result, "Unwrapped key matches original");
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}).catch(function(err){
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assert_unreached("Round trip for non-extractable key threw an error - " + err.name + ': "' + err.message + '"');
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}).then(function(){
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return subtle.unwrapKey("jwk", wrappedKey, wrapper.unwrappingKey, wrapper.parameters.wrapParameters, toWrap.algorithm, true, toWrap.usages);
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}).then(function(unwrappedResult){
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assert_unreached("Unwrapping a non-extractable JWK as extractable should fail");
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}).catch(function(err){
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assert_equals(err.name, "DataError", "Unwrapping a non-extractable JWK as extractable fails with DataError");
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});
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}, "Can unwrap " + toWrap.name + " non-extractable keys using jwk and " + wrapper.parameters.name);
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}
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}
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}
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});
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}));
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}
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// Implement key wrapping by hand to wrap a key as non-extractable JWK
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function wrapAsNonExtractableJwk(key, wrapper){
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var wrappingKey = wrapper.wrappingKey,
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encryptKey;
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return subtle.exportKey("jwk",wrappingKey)
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.then(function(jwkWrappingKey){
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// Update the key generation parameters to work as key import parameters
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var params = Object.create(wrapper.parameters.generateParameters);
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if(params.name === "AES-KW") {
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params.name = "AES-CBC";
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jwkWrappingKey.alg = "A"+params.length+"CBC";
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} else if (params.name === "RSA-OAEP") {
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params.modulusLength = undefined;
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params.publicExponent = undefined;
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}
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jwkWrappingKey.key_ops = ["encrypt"];
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return subtle.importKey("jwk", jwkWrappingKey, params, true, ["encrypt"]);
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}).then(function(importedWrappingKey){
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encryptKey = importedWrappingKey;
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return subtle.exportKey("jwk",key);
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}).then(function(exportedKey){
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exportedKey.ext = false;
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var jwk = JSON.stringify(exportedKey)
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if (wrappingKey.algorithm.name === "AES-KW") {
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return aeskw(encryptKey, str2ab(jwk.slice(0,-1) + " ".repeat(jwk.length%8 ? 8-jwk.length%8 : 0) + "}"));
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} else {
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return subtle.encrypt(wrapper.parameters.wrapParameters,encryptKey,str2ab(jwk));
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}
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});
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}
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// RSA-OAEP can only wrap relatively small payloads. AES-KW can only
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// wrap payloads a multiple of 8 bytes long.
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function wrappingIsPossible(exportedKey, algorithmName) {
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if ("byteLength" in exportedKey && algorithmName === "AES-KW") {
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return exportedKey.byteLength % 8 === 0;
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}
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if ("byteLength" in exportedKey && algorithmName === "RSA-OAEP") {
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// RSA-OAEP can only encrypt payloads with lengths shorter
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// than modulusLength - 2*hashLength - 1 bytes long. For
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// a 4096 bit modulus and SHA-256, that comes to
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// 4096/8 - 2*(256/8) - 1 = 512 - 2*32 - 1 = 447 bytes.
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return exportedKey.byteLength <= 446;
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}
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if ("kty" in exportedKey && algorithmName === "AES-KW") {
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return JSON.stringify(exportedKey).length % 8 == 0;
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}
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if ("kty" in exportedKey && algorithmName === "RSA-OAEP") {
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return JSON.stringify(exportedKey).length <= 478;
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}
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return true;
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}
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// Helper methods follow:
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// Are two exported keys equal
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function equalExport(originalExport, roundTripExport) {
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if ("byteLength" in originalExport) {
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return equalBuffers(originalExport, roundTripExport);
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} else {
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return equalJwk(originalExport, roundTripExport);
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}
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}
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// Are two array buffers the same?
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function equalBuffers(a, b) {
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if (a.byteLength !== b.byteLength) {
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return false;
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}
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var aBytes = new Uint8Array(a);
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var bBytes = new Uint8Array(b);
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for (var i=0; i<a.byteLength; i++) {
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if (aBytes[i] !== bBytes[i]) {
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return false;
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}
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}
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return true;
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}
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// Are two Jwk objects "the same"? That is, does the object returned include
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// matching values for each property that was expected? It's okay if the
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// returned object has extra methods; they aren't checked.
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function equalJwk(expected, got) {
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var fields = Object.keys(expected);
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var fieldName;
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for(var i=0; i<fields.length; i++) {
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fieldName = fields[i];
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if (!(fieldName in got)) {
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return false;
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}
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if (objectToString(expected[fieldName]) !== objectToString(got[fieldName])) {
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return false;
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}
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}
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return true;
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}
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// Character representation of any object we may use as a parameter.
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function objectToString(obj) {
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var keyValuePairs = [];
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if (Array.isArray(obj)) {
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return "[" + obj.map(function(elem){return objectToString(elem);}).join(", ") + "]";
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} else if (typeof obj === "object") {
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Object.keys(obj).sort().forEach(function(keyName) {
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keyValuePairs.push(keyName + ": " + objectToString(obj[keyName]));
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});
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return "{" + keyValuePairs.join(", ") + "}";
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} else if (typeof obj === "undefined") {
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return "undefined";
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} else {
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return obj.toString();
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}
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var keyValuePairs = [];
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Object.keys(obj).sort().forEach(function(keyName) {
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var value = obj[keyName];
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if (typeof value === "object") {
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value = objectToString(value);
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} else if (typeof value === "array") {
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value = "[" + value.map(function(elem){return objectToString(elem);}).join(", ") + "]";
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} else {
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value = value.toString();
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}
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keyValuePairs.push(keyName + ": " + value);
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});
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return "{" + keyValuePairs.join(", ") + "}";
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}
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// Can we compare key values by using them
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function canCompareNonExtractableKeys(key){
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if (key.usages.indexOf("decrypt") !== -1) {
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return true;
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}
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if (key.usages.indexOf("sign") !== -1) {
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return true;
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}
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if (key.usages.indexOf("wrapKey") !== -1) {
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return true;
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}
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if (key.usages.indexOf("deriveBits") !== -1) {
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return true;
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}
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return false;
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}
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// Compare two keys by using them (works for non-extractable keys)
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function equalKeys(expected, got){
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if ( expected.algorithm.name !== got.algorithm.name ) {
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return Promise.resolve(false);
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}
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var cryptParams, signParams, wrapParams, deriveParams;
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switch(expected.algorithm.name){
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case "AES-CTR" :
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cryptParams = {name: "AES-CTR", counter: new Uint8Array(16), length: 64};
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break;
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case "AES-CBC" :
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cryptParams = {name: "AES-CBC", iv: new Uint8Array(16) };
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break;
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case "AES-GCM" :
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cryptParams = {name: "AES-GCM", iv: new Uint8Array(16) };
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break;
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case "RSA-OAEP" :
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cryptParams = {name: "RSA-OAEP", label: new Uint8Array(8) };
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break;
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case "RSASSA-PKCS1-v1_5" :
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signParams = {name: "RSASSA-PKCS1-v1_5"};
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break;
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case "RSA-PSS" :
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signParams = {name: "RSA-PSS", saltLength: 32 };
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break;
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case "ECDSA" :
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signParams = {name: "ECDSA", hash: "SHA-256"};
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break;
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case "HMAC" :
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signParams = {name: "HMAC"};
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break;
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case "AES-KW" :
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wrapParams = {name: "AES-KW"};
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break;
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case "ECDH" :
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deriveParams = {name: "ECDH", public: ecdhPeerKey};
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break;
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default:
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throw new Error("Unsupported algorithm for key comparison");
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}
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if (cryptParams) {
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return subtle.exportKey("jwk",expected)
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.then(function(jwkExpectedKey){
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if (expected.algorithm.name === "RSA-OAEP") {
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["d","p","q","dp","dq","qi","oth"].forEach(function(field){ delete jwkExpectedKey[field]; });
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}
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jwkExpectedKey.key_ops = ["encrypt"];
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return subtle.importKey("jwk", jwkExpectedKey, expected.algorithm, true, ["encrypt"]);
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}).then(function(expectedEncryptKey){
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return subtle.encrypt(cryptParams, expectedEncryptKey, new Uint8Array(32));
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}).then(function(encryptedData){
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return subtle.decrypt(cryptParams, got, encryptedData);
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}).then(function(decryptedData){
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var result = new Uint8Array(decryptedData);
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return !result.some(x => x);
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});
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} else if (signParams) {
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var verifyKey;
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return subtle.exportKey("jwk",expected)
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.then(function(jwkExpectedKey){
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if (expected.algorithm.name === "RSA-PSS" || expected.algorithm.name === "RSASSA-PKCS1-v1_5") {
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["d","p","q","dp","dq","qi","oth"].forEach(function(field){ delete jwkExpectedKey[field]; });
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}
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if (expected.algorithm.name === "ECDSA") {
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delete jwkExpectedKey["d"];
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}
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jwkExpectedKey.key_ops = ["verify"];
|
||||
return subtle.importKey("jwk", jwkExpectedKey, expected.algorithm, true, ["verify"]);
|
||||
}).then(function(expectedVerifyKey){
|
||||
verifyKey = expectedVerifyKey;
|
||||
return subtle.sign(signParams, got, new Uint8Array(32));
|
||||
}).then(function(signature){
|
||||
return subtle.verify(signParams, verifyKey, signature, new Uint8Array(32));
|
||||
});
|
||||
} else if (wrapParams) {
|
||||
var aKeyToWrap, wrappedWithExpected;
|
||||
return subtle.importKey("raw", new Uint8Array(16), "AES-CBC", true, ["encrypt"])
|
||||
.then(function(key){
|
||||
aKeyToWrap = key;
|
||||
return subtle.wrapKey("raw", aKeyToWrap, expected, wrapParams);
|
||||
}).then(function(wrapResult){
|
||||
wrappedWithExpected = Array.from((new Uint8Array(wrapResult)).values());
|
||||
return subtle.wrapKey("raw", aKeyToWrap, got, wrapParams);
|
||||
}).then(function(wrapResult){
|
||||
var wrappedWithGot = Array.from((new Uint8Array(wrapResult)).values());
|
||||
return wrappedWithGot.every((x,i) => x === wrappedWithExpected[i]);
|
||||
});
|
||||
} else {
|
||||
var expectedDerivedBits;
|
||||
return subtle.deriveBits(deriveParams, expected, 128)
|
||||
.then(function(result){
|
||||
expectedDerivedBits = Array.from((new Uint8Array(result)).values());
|
||||
return subtle.deriveBits(deriveParams, got, 128);
|
||||
}).then(function(result){
|
||||
var gotDerivedBits = Array.from((new Uint8Array(result)).values());
|
||||
return gotDerivedBits.every((x,i) => x === expectedDerivedBits[i]);
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
// Raw AES encryption
|
||||
function aes( k, p ) {
|
||||
return subtle.encrypt({name: "AES-CBC", iv: new Uint8Array(16) }, k, p).then(function(ciphertext){return ciphertext.slice(0,16);});
|
||||
}
|
||||
|
||||
// AES Key Wrap
|
||||
function aeskw(key, data) {
|
||||
if (data.byteLength % 8 !== 0) {
|
||||
throw new Error("AES Key Wrap data must be a multiple of 8 bytes in length");
|
||||
}
|
||||
|
||||
var A = Uint8Array.from([0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0, 0, 0, 0, 0, 0, 0, 0]),
|
||||
Av = new DataView(A.buffer),
|
||||
R = [],
|
||||
n = data.byteLength / 8;
|
||||
|
||||
for(var i = 0; i<data.byteLength; i+=8) {
|
||||
R.push(new Uint8Array(data.slice(i,i+8)));
|
||||
}
|
||||
|
||||
function aeskw_step(j, i, final, B) {
|
||||
A.set(new Uint8Array(B.slice(0,8)));
|
||||
Av.setUint32(4,Av.getUint32(4) ^ (n*j+i+1));
|
||||
R[i] = new Uint8Array(B.slice(8,16));
|
||||
if (final) {
|
||||
R.unshift(A.slice(0,8));
|
||||
var result = new Uint8Array(R.length * 8);
|
||||
R.forEach(function(Ri,i){ result.set(Ri, i*8); });
|
||||
return result;
|
||||
} else {
|
||||
A.set(R[(i+1)%n],8);
|
||||
return aes(key,A);
|
||||
}
|
||||
}
|
||||
|
||||
var p = new Promise(function(resolve){
|
||||
A.set(R[0],8);
|
||||
resolve(aes(key,A));
|
||||
});
|
||||
|
||||
for(var j=0;j<6;++j) {
|
||||
for(var i=0;i<n;++i) {
|
||||
p = p.then(aeskw_step.bind(undefined, j, i,j===5 && i===(n-1)));
|
||||
}
|
||||
}
|
||||
|
||||
return p;
|
||||
}
|
||||
|
||||
function str2ab(str) { return Uint8Array.from( str.split(''), function(s){return s.charCodeAt(0)} ); }
|
||||
function ab2str(ab) { return String.fromCharCode.apply(null, new Uint8Array(ab)); }
|
||||
|
||||
Reference in New Issue
Block a user