[webcrypto] Expose crypto.subtle to web workers.

LayoutTests/crypto/resources/subtle-crypto-concurrent.js

+if (self.importScripts) {
+    importScripts('../../resources/js-test.js');
+    importScripts('common.js');
+}
+
+function shouldEvaluateAsSilent(expressionToEval, expectedResult)
+{
+    var result = eval(expressionToEval);
+    if (result !== expectedResult) {
+        testFailed(expressionToEval + " evaluated to " + result + " instead of " + expectedResult);
+    }
+}
+
+function doPostMessage(data)
+{
+    if (isWorker())
+        self.postMessage(data);
+    else
+        self.postMessage(data, '*');
+}
+
+function notifySuccess()
+{
+    doPostMessage("TEST_FINISHED");
+}
+
+function notifyFailure(details)
+{
+    doPostMessage("FAIL:" + details);
+}
+
+function testGenerateRsaKey()
+{
+    var extractable = false;
+    var usages = ['encrypt', 'decrypt'];
+    // Note that the modulus length is unsually small, in order to speed up the test.
+    var algorithm = {name: "RSAES-PKCS1-v1_5", modulusLength: 256, publicExponent: hexStringToUint8Array("010001")};
+
+    return crypto.subtle.generateKey(algorithm, extractable, usages).then(function(result) {
+        publicKey = result.publicKey;
+        privateKey = result.privateKey;
+
+        shouldEvaluateAsSilent("publicKey.type", "public");
+        shouldEvaluateAsSilent("publicKey.extractable", true);
+        shouldEvaluateAsSilent("publicKey.algorithm.name", algorithm.name);
+        shouldEvaluateAsSilent("publicKey.algorithm.modulusLength", algorithm.modulusLength);
+        shouldEvaluateAsSilent("bytesToHexString(publicKey.algorithm.publicExponent)", "010001");
+
+        shouldEvaluateAsSilent("privateKey.type", "private");
+        shouldEvaluateAsSilent("privateKey.extractable", false);
+        shouldEvaluateAsSilent("privateKey.algorithm.name", algorithm.name);
+        shouldEvaluateAsSilent("privateKey.algorithm.modulusLength", algorithm.modulusLength);
+        shouldEvaluateAsSilent("bytesToHexString(privateKey.algorithm.publicExponent)", "010001");
+    });
+}
+
+// Very similar to "hmac-sign-verify.html".
+function testHmac()
+{
+    var importAlgorithm = {name: 'HMAC', hash: {name: "SHA-256"}};
+    var algorithm = {name: 'HMAC'};
+
+    var key = null;
+
+    var testCase = {
+      hash: "SHA-256",
+      key: "9779d9120642797f1747025d5b22b7ac607cab08e1758f2f3a46c8be1e25c53b8c6a8f58ffefa176",
+      message: "b1689c2591eaf3c9e66070f8a77954ffb81749f1b00346f9dfe0b2ee905dcc288baf4a92de3f4001dd9f44c468c3d07d6c6ee82faceafc97c2fc0fc0601719d2dcd0aa2aec92d1b0ae933c65eb06a03c9c935c2bad0459810241347ab87e9f11adb30415424c6c7f5f22a003b8ab8de54f6ded0e3ab9245fa79568451dfa258e",
+      mac: "769f00d3e6a6cc1fb426a14a4f76c6462e6149726e0dee0ec0cf97a16605ac8b"
+    };
+
+    var keyData = hexStringToUint8Array(testCase.key);
+    var usages = ['sign', 'verify'];
+    var extractable = true;
+
+    // (1) Import the key
+    return crypto.subtle.importKey('raw', keyData, importAlgorithm, extractable, usages).then(function(result) {
+        key = result;
+
+        // shouldBe() can only resolve variables in global context.
+        tmpKey = key;
+        shouldEvaluateAsSilent("tmpKey.type", "secret");
+        shouldEvaluateAsSilent("tmpKey.extractable", true);
+        shouldEvaluateAsSilent("tmpKey.algorithm.name", "HMAC");
+        shouldEvaluateAsSilent("tmpKey.algorithm.hash.name", testCase.hash);
+        shouldEvaluateAsSilent("tmpKey.algorithm.length", keyData.length * 8);
+        shouldEvaluateAsSilent("tmpKey.usages.join(',')", "sign,verify");
+
+        // (2) Sign.
+        return crypto.subtle.sign(algorithm, key, hexStringToUint8Array(testCase.message));
+    }).then(function(result) {
+        mac = result;
+        shouldEvaluateAsSilent("bytesToHexString(mac)", testCase.mac);
+
+        // (3) Verify
+        return crypto.subtle.verify(algorithm, key, hexStringToUint8Array(testCase.mac), hexStringToUint8Array(testCase.message));
+    }).then(function(result) {
+        verifyResult = result;
+        shouldEvaluateAsSilent("verifyResult", true);
+
+        // (4) Verify truncated mac (by stripping 1 byte off of it).
+        var expectedMac = hexStringToUint8Array(testCase.mac);
+        return crypto.subtle.verify(algorithm, key, expectedMac.subarray(0, expectedMac.byteLength - 1), hexStringToUint8Array(testCase.message));
+    }).then(function(result) {
+        verifyResult = result;
+        shouldEvaluateAsSilent("verifyResult", false);
+
+        return crypto.subtle.exportKey('raw', key);
+    }).then(function(result) {
+        exportedKeyData = result;
+        shouldEvaluateAsSilent("bytesToHexString(exportedKeyData)", testCase.key);
+    });
+}
+
+// Very similar to aes-gcm-encrypt-decrypt.hml
+function testAesGcm()
+{
+    var testCase = {
+      "key": "ae7972c025d7f2ca3dd37dcc3d41c506671765087c6b61b8",
+      "iv": "984c1379e6ba961c828d792d",
+      "plainText": "d30b02c343487105219d6fa080acc743",
+      "cipherText": "c4489fa64a6edf80e7e6a3b8855bc37c",
+      "additionalData": "edd8f630f9bbc31b0acf122998f15589d6e6e3e1a3ec89e0c6a6ece751610ebbf57fdfb9d82028ff1d9faebe37a268c1",
+      "authenticationTag": "772ee7de0f91a981c36c93a35c88"
+    };
+
+    var key = null;
+    var keyData = hexStringToUint8Array(testCase.key);
+    var iv = hexStringToUint8Array(testCase.iv);
+    var additionalData = hexStringToUint8Array(testCase.additionalData);
+    var tag = hexStringToUint8Array(testCase.authenticationTag);
+    var usages = ['encrypt', 'decrypt'];
+    var extractable = false;
+
+    var tagLengthBits = tag.byteLength * 8;
+
+    var algorithm = {name: 'aes-gcm', iv: iv, additionalData: additionalData, tagLength: tagLengthBits};
+
+    // (1) Import the key
+    return crypto.subtle.importKey('raw', keyData, algorithm, extractable, usages).then(function(result) {
+        key = result;
+
+        // shouldBe() can only resolve variables in global context.
+        tmpKey = key;
+        shouldEvaluateAsSilent("tmpKey.type", "secret");
+        shouldEvaluateAsSilent("tmpKey.extractable", false);
+        shouldEvaluateAsSilent("tmpKey.algorithm.name", "AES-GCM");
+        shouldEvaluateAsSilent("tmpKey.usages.join(',')", "encrypt,decrypt");
+
+        // (2) Encrypt.
+        return crypto.subtle.encrypt(algorithm, key, hexStringToUint8Array(testCase.plainText));
+    }).then(function(result) {
+        cipherText = result;
+        shouldEvaluateAsSilent("bytesToHexString(cipherText)", testCase.cipherText + testCase.authenticationTag);
+
+        // (3) Decrypt
+        return crypto.subtle.decrypt(algorithm, key, hexStringToUint8Array(testCase.cipherText + testCase.authenticationTag));
+    }).then(function(result) {
+        plainText = result;
+        shouldEvaluateAsSilent("bytesToHexString(plainText)", testCase.plainText);
+    });
+}
+
+Promise.all([
+    testHmac(),
+    testGenerateRsaKey(),
+    testAesGcm(),
+    testHmac(),
+    testAesGcm(),
+]).then(notifySuccess, notifyFailure);