function define_tests() {
// May want to test prefixed implementations.
var subtle = self.crypto.subtle;
// Verify the derive functions perform checks against the all-zero value results,
// ensuring small-order points are rejected.
// https://www.rfc-editor.org/rfc/rfc7748#section-6.1
// TODO: The spec states that the check must be done on use, but there is discussion about doing it on import.
// https://github.com/WICG/webcrypto-secure-curves/pull/13
Object.keys(kSmallOrderPoint).forEach(function(algorithmName) {
kSmallOrderPoint[algorithmName].forEach(function(test) {
promise_test(async() => {
let derived;
let privateKey;
let publicKey;
try {
privateKey = await subtle.importKey("pkcs8", pkcs8[algorithmName],
{name: algorithmName},
false, ["deriveBits", "deriveKey"]);
publicKey = await subtle.importKey("spki", test.vector,
{name: algorithmName},
false, [])
derived = await subtle.deriveKey({name: algorithmName, public: publicKey}, privateKey,
{name: "HMAC", hash: "SHA-256", length: 256}, true,
["sign", "verify"]);
} catch (err) {
assert_false(privateKey === undefined, "Private key should be valid.");
assert_false(publicKey === undefined, "Public key should be valid.");
assert_equals(err.name, "OperationError", "Should throw correct error, not " + err.name + ": " + err.message + ".");
}
assert_equals(derived, undefined, "Operation succeeded, but should not have.");
}, algorithmName + " deriveBits checks for all-zero value result with a key of order " + test.order);
});
});
// Ensure the keys generated by each algorithm are valid for key derivation.
Object.keys(sizes).forEach(function(algorithmName) {
promise_test(async() => {
let derived;
try {
let key = await subtle.generateKey({name: algorithmName}, true, ["deriveKey", "deriveBits"]);
derived = await subtle.deriveKey({name: algorithmName, public: key.publicKey}, key.privateKey, {name: "HMAC", hash: "SHA-256", length: 256}, true, ["sign", "verify"]);
} catch (err) {
assert_unreached("Threw an unexpected error: " + err.toString() + " -");
}
assert_false (derived === undefined, "Key derivation failed.");
}, "Key derivation using a " + algorithmName + " generated keys.");
});
return importKeys(pkcs8, spki, sizes)
.then(function(results) {
publicKeys = results.publicKeys;
privateKeys = results.privateKeys;
noDeriveKeyKeys = results.noDeriveKeyKeys;
Object.keys(sizes).forEach(function(algorithmName) {
// Basic success case
promise_test(function(test) {
return subtle.deriveKey({name: algorithmName, public: publicKeys[algorithmName]}, privateKeys[algorithmName], {name: "HMAC", hash: "SHA-256", length: 256}, true, ["sign", "verify"])
.then(function(key) {return crypto.subtle.exportKey("raw", key);})
.then(function(exportedKey) {
assert_true(equalBuffers(exportedKey, derivations[algorithmName], 8 * exportedKey.length), "Derived correct key");
}, function(err) {
assert_unreached("deriveKey failed with error " + err.name + ": " + err.message);
});
}, algorithmName + " good parameters");
// Case insensitivity check
promise_test(function(test) {
return subtle.deriveKey({name: algorithmName.toLowerCase(), public: publicKeys[algorithmName]}, privateKeys[algorithmName], {name: "HMAC", hash: "SHA-256", length: 256}, true, ["sign", "verify"])
.then(function(key) {return crypto.subtle.exportKey("raw", key);})
.then(function(exportedKey) {
assert_true(equalBuffers(exportedKey, derivations[algorithmName], 8 * exportedKey.length), "Derived correct key");
}, function(err) {
assert_unreached("deriveKey failed with error " + err.name + ": " + err.message);
});
}, algorithmName + " mixed case parameters");
// Errors to test:
// - missing public property TypeError
promise_test(function(test) {
return subtle.deriveKey({name: algorithmName}, privateKeys[algorithmName], {name: "HMAC", hash: "SHA-256", length: 256}, true, ["sign", "verify"])
.then(function(key) {return crypto.subtle.exportKey("raw", key);})
.then(function(exportedKey) {
assert_unreached("deriveKey succeeded but should have failed with TypeError");
}, function(err) {
assert_equals(err.name, "TypeError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " missing public property");
// - Non CryptoKey public property TypeError
promise_test(function(test) {
return subtle.deriveKey({name: algorithmName, public: {message: "Not a CryptoKey"}}, privateKeys[algorithmName], {name: "HMAC", hash: "SHA-256", length: 256}, true, ["sign", "verify"])
.then(function(key) {return crypto.subtle.exportKey("raw", key);})
.then(function(exportedKey) {
assert_unreached("deriveKey succeeded but should have failed with TypeError");
}, function(err) {
assert_equals(err.name, "TypeError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " public property of algorithm is not a CryptoKey");
// - wrong algorithm
promise_test(function(test) {
publicKey = publicKeys["X25519"];
if (algorithmName === "X25519") {
publicKey = publicKeys["X448"];
}
return subtle.deriveKey({name: algorithmName, public: publicKey}, privateKeys[algorithmName], {name: "HMAC", hash: "SHA-256", length: 256}, true, ["sign", "verify"])
.then(function(key) {return crypto.subtle.exportKey("raw", key);})
.then(function(exportedKey) {
assert_unreached("deriveKey succeeded but should have failed with InvalidAccessError");
}, function(err) {
assert_equals(err.name, "InvalidAccessError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " mismatched algorithms");
// - No deriveKey usage in baseKey InvalidAccessError
promise_test(function(test) {
return subtle.deriveKey({name: algorithmName, public: publicKeys[algorithmName]}, noDeriveKeyKeys[algorithmName], {name: "HMAC", hash: "SHA-256", length: 256}, true, ["sign", "verify"])
.then(function(key) {return crypto.subtle.exportKey("raw", key);})
.then(function(exportedKey) {
assert_unreached("deriveKey succeeded but should have failed with InvalidAccessError");
}, function(err) {
assert_equals(err.name, "InvalidAccessError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " no deriveKey usage for base key");
// - Use public key for baseKey InvalidAccessError
promise_test(function(test) {
return subtle.deriveKey({name: algorithmName, public: publicKeys[algorithmName]}, publicKeys[algorithmName], {name: "HMAC", hash: "SHA-256", length: 256}, true, ["sign", "verify"])
.then(function(key) {return crypto.subtle.exportKey("raw", key);})
.then(function(exportedKey) {
assert_unreached("deriveKey succeeded but should have failed with InvalidAccessError");
}, function(err) {
assert_equals(err.name, "InvalidAccessError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " base key is not a private key");
// - Use private key for public property InvalidAccessError
promise_test(function(test) {
return subtle.deriveKey({name: algorithmName, public: privateKeys[algorithmName]}, privateKeys[algorithmName], {name: "HMAC", hash: "SHA-256", length: 256}, true, ["sign", "verify"])
.then(function(key) {return crypto.subtle.exportKey("raw", key);})
.then(function(exportedKey) {
assert_unreached("deriveKey succeeded but should have failed with InvalidAccessError");
}, function(err) {
assert_equals(err.name, "InvalidAccessError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " public property value is a private key");
// - Use secret key for public property InvalidAccessError
promise_test(function(test) {
return subtle.generateKey({name: "HMAC", hash: "SHA-256", length: 256}, true, ["sign", "verify"])
.then(function(secretKey) {
return subtle.deriveKey({name: algorithmName, public: secretKey}, privateKeys[algorithmName], {name: "AES-CBC", length: 256}, true, ["sign", "verify"])
.then(function(key) {return crypto.subtle.exportKey("raw", key);})
.then(function(exportedKey) {
assert_unreached("deriveKey succeeded but should have failed with InvalidAccessError");
}, function(err) {
assert_equals(err.name, "InvalidAccessError", "Should throw correct error, not " + err.name + ": " + err.message);
});
});
}, algorithmName + " public property value is a secret key");
});
});
function importKeys(pkcs8, spki, sizes) {
var privateKeys = {};
var publicKeys = {};
var noDeriveKeyKeys = {};
var promises = [];
Object.keys(pkcs8).forEach(function(algorithmName) {
var operation = subtle.importKey("pkcs8", pkcs8[algorithmName],
{name: algorithmName},
false, ["deriveBits", "deriveKey"])
.then(function(key) {
privateKeys[algorithmName] = key;
}, function (err) {
privateKeys[algorithmName] = null;
});
promises.push(operation);
});
Object.keys(pkcs8).forEach(function(algorithmName) {
var operation = subtle.importKey("pkcs8", pkcs8[algorithmName],
{name: algorithmName},
false, ["deriveBits"])
.then(function(key) {
noDeriveKeyKeys[algorithmName] = key;
}, function (err) {
noDeriveKeyKeys[algorithmName] = null;
});
promises.push(operation);
});
Object.keys(spki).forEach(function(algorithmName) {
var operation = subtle.importKey("spki", spki[algorithmName],
{name: algorithmName},
false, [])
.then(function(key) {
publicKeys[algorithmName] = key;
}, function (err) {
publicKeys[algorithmName] = null;
});
promises.push(operation);
});
return Promise.all(promises)
.then(function(results) {return {privateKeys: privateKeys, publicKeys: publicKeys, noDeriveKeyKeys: noDeriveKeyKeys}});
}
// Compares two ArrayBuffer or ArrayBufferView objects. If bitCount is
// omitted, the two values must be the same length and have the same contents
// in every byte. If bitCount is included, only that leading number of bits
// have to match.
function equalBuffers(a, b, bitCount) {
var remainder;
if (typeof bitCount === "undefined" && a.byteLength !== b.byteLength) {
return false;
}
var aBytes = new Uint8Array(a);
var bBytes = new Uint8Array(b);
var length = a.byteLength;
if (typeof bitCount !== "undefined") {
length = Math.floor(bitCount / 8);
}
for (var i=0; i<length; i++) {
if (aBytes[i] !== bBytes[i]) {
return false;
}
}
if (typeof bitCount !== "undefined") {
remainder = bitCount % 8;
return aBytes[length] >> (8 - remainder) === bBytes[length] >> (8 - remainder);
}
return true;
}
}
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