Bug 156114 – WebCrypto can generate but fails to export RSA-OAEP-256 keys

• Status: RESOLVED
• Resolution: CONFIGURATION CHANGED
• Component: WebCore Misc.

[Roustem]

crypto.webkitSubtle.generateKey({
			name: "RSA-OAEP",
			modulusLength: 2048,
			publicExponent: new Uint8Array([0x01, 0x00, 0x01]),
			hash: {name: "SHA-256"}
		}, true, ["encrypt", "decrypt" ]).then((keypair) => {
			console.log("Generated Key Pair:", keypair);
			return crypto.webkitSubtle.exportKey("jwk", keypair.publicKey);
		}).then((keydata) => {
			console.log("Key Data:", keydata);
		}).catch((error) => {
			console.log("Error: ", error);
		});


The code above should be able log both the newly Generated Key Pair and also log the Key Data.

It successfully generates the key pair:

[Log] Generated Key Pair: – KeyPair {publicKey: Key, privateKey: Key}
KeyPair {publicKey: Key, privateKey: Key}KeyPairprivateKey: Key {type: "private", extractable: true, algorithm: Object, usages: ["decrypt", "encrypt"]}KeypublicKey: Key {type: "public", extractable: true, algorithm: Object, usages: ["decrypt", "encrypt"]}KeyKeyPair Prototype

But not able to export it:

[Log] Error: 
TypeError: Key algorithm and size do not map to any JWK algorithm identifier
exportKey
promiseReactionJob

[David Kilzer (:ddkilzer)]

<rdar://problem/25507292>

[Brent Fulgham]

From the ChangeLog in <http://trac.webkit.org/changeset/159944>:

This is happening because RSA-OAEP in JWK is more limited than general WebCrypto, as JWK only allows SHA-1 as hash.

I'm not sure whether that statement is correct.

[Brent Fulgham]

It looks like we are not up-to-date with http://www.w3.org/TR/WebCryptoAPI/.

[Alexey Proskuryakov]

That statement is probably obsolete, JWK added many new identifiers since then.

[Jiewen Tan]

This bug should be resolved by Bug 164722.