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使用WebAuthn时偶尔出现NotSupportedError异常

webauthn google-chrome javascript

Vasyl Boroviak · 技术社区 · 5 年前

我们使用WebAuthn。虽然有些设备会抛出异常 NotSupportedError: The user agent does not support public key credentials.

以下是我们如何检查平台身份验证功能是否可用:

async function isWebAuthn() {
    return Boolean(
        navigator.credentials &&
        navigator.credentials.create &&
        navigator.credentials.get &&
        self.PublicKeyCredential &&
        self.PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable &&
        await self.PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable()
    );
}

我们看到至少有两个设备在每次尝试调用时都会抛出异常 navigator.credentials.create() .

Mozilla/5.0 (Linux; Android 9; ONEPLUS A3003) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.136 Mobile Safari/537.36
Mozilla/5.0 (Linux; Android 9; LG-H930) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.116 Mobile Safari/537.36

以下是电话:

await navigator.credentials.create({
    publicKey: {
        authenticatorSelection: {
            authenticatorAttachment: "platform",
            requireResidentKey: false,
            userVerification: "required"
        },
        challenge: challenge,
        rp: { id: document.domain, name: name },
        user: {
            id: id,
            name: name,
            displayName: displayName
        },
        pubKeyCredParams: [
            { type: "public-key", alg: -7 },
            { type: "public-key", alg: -257 }
        ]
    }
});

如何避免浏览器抛出该异常?