will get wrong tag sometimes #3

    let tagSize = 16
    let skey = try! Data(hex: "3b479df68f7fb8e75f4761e547f9b7d98467534c2c25d7b3dceec198984d43aa")
    let nonce = try! Data(hex: "030000000000000000000000")
    
    let plaintext = try! Data(hex: "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")
    
    let payload = try! Data(hex: "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")
    
    if let gcmEnc = try? SwiftGCM(key: skey, nonce: nonce, tagSize:tagSize),
        let ciphertext = try? gcmEnc.encrypt(auth: nil,
                                             plaintext: plaintext) {
        print("ciphertext = \(ciphertext.hexString(withSpace: false, breakAt: 16)), len=\(ciphertext.count), EQUALS=\(ciphertext==payload)")
    }