SubtleCrypto interface type definitions not valid

[samuelhorwitz]

TypeScript Version:

1.8.9

Code

Example 1

crypto.subtle.sign(
    {
        name: 'ECDSA',
        hash: {
            name: 'SHA-256'
        }
    },
    privateKey,
    arrayBuffer
);

Expected behavior:
It is acceptable for the first argument to be an object. Should compile.

Actual behavior:
Error TS2345: Argument of type '{ name: string; hash: { name: string; }; }' is not assignable to parameter of type 'string | Algorithm'. Object literal may only specify known properties, and 'hash' does not exist in type 'string | Algorithm'.

Example 2

crypto.subtle.generateKey(
    {
        name: 'ECDSA',
        namedCurve: 'P-256'
    },
    false,
    ['sign']
);

Expected behavior:
It is acceptable for the first argument to be an object. Should compile.

Actual behavior:
Error TS2345: Argument of type \'{ name: string; namedCurve: string; }\' is not assignable to parameter of type \'string | Algorithm\'.\n Object literal may only specify known properties, and \'namedCurve\' does not exist in type \'string | Algorithm\'.

Example 3

crypto.subtle.verify(
    {
        name: 'ECDSA',
        hash: {
            name: 'SHA-256'
        }
    },
    publicKey,
    signature,
    arrayBuffer
);

Expected behavior:
It is acceptable for the first argument to be an object. Should compile.

Actual behavior:
Error TS2345: Argument of type \'{ name: string; hash: { name: string; }; }\' is not assignable to parameter of type \'string | Algorithm\'.\n Object literal may only specify known properties, and \'hash\' does not exist in type \'string | Algorithm\'.

Example 4

crypto.subtle.importKey('spki', spki, {
    name: 'ECDSA',
    namedCurve: 'P-256'
}, true, ['verify']);

Expected behavior:
It is acceptable for the third argument to be an object. Should compile.

Actual behavior:
Error TS2345: Argument of type \'{ name: string; namedCurve: string; }\' is not assignable to parameter of type \'string | Algorithm\'.\n Object literal may only specify known properties, and \'namedCurve\' does not exist in type \'string | Algorithm\'.

[samuelhorwitz]

To clarify, this would likely impact any WebCrypto usage because it assumes the algorithm parameter is always of type string or Algorithm. Algorithm seems be an interface which optionally has a name string. However it doesn't specify all the other possibilities which seems to effectively break WebCrypto. Before I updated from 1.6.2, all of this stuff worked.

[samuelhorwitz]

Hm, this appears to be an issue with TS DOM definition generator. Found same issue referenced here with recent updates: microsoft/TypeScript-DOM-lib-generator#60