deviceVerificationID

Declaration

static var deviceVerificationID: UUID? { get }

Discussion

Use this property to verify whether an App Store-signed JSON Web Signature (JWS) is valid for the current device. The JWS may be one of the following:

• A jwsRepresentation representing a signed transaction

• A jwsRepresentation representing a signed subscription renewal information

• A jwsRepresentation representing a signed app transaction.

To verify that the JWS is valid for the current device, follow these steps:

1. Append the lowercased UUID string representation of this property, deviceVerificationID, after the lowercased UUID string representation of the device verification nonce. For a transaction, the nonce is deviceVerificationNonce. For subscription renewal information, the nonce is deviceVerificationNonce. For an app transaction, the nonce is deviceVerificationNonce.

2. Compute the SHA-384 hash of the appended UUID strings.

3. Verify that the SHA-384 digest is equal to the device verification property. For a transaction, the device verification property is deviceVerification. For subscription renewal information, the device verification property is deviceVerification. For an app transaction, the device verifcation property is deviceVerification.