Exporting working keys

To maintain compatibility with other parties, AWS Payment Cryptography supports AS2805 symmetric key wrapping techniques which use key variants instead of keyblocks like TR-31. If multiple keys are shared between parties, each should be exported individually. If data is sent bi-directionally, there may be two keys between parties of the same type such as ZAK(s) and ZAK(r) that are used by each side to generate message authentication codes.

The additional parameters to import and export in these formats are specified on the commands.

cat >> export-zone-pin-key.json 
{
    "ExportKeyIdentifier": "arn:aws:payment-cryptography:us-east-2:111122223333:key/alsuwfxug3pgy6xh",
    "KeyMaterial": {
        "As2805KeyCryptogram": {
            "WrappingKeyIdentifier": "arn:aws:payment-cryptography:us-east-2:111122223333:key/rhfm6tenpxapkmrv",
            "As2805KeyVariant: "PIN_ENCRYPTION_KEY_VARIANT_28"
        }
    }
}

$ aws payment-cryptography-data export-key --cli-input-json file://export-zone-pin-key.json --region ap-southeast-2

{
    "WrappedKey": {
        "KeyCheckValue": "DC1081",
        "KeyCheckValueAlgorithm": "ANSI_X9_24",
        "KeyMaterial": "HDC10AEF038E695DDD72AF08DC1BB422D",
        "WrappedKeyMaterialFormat": "KEY_CRYPTOGRAM",
        "WrappingKeyArn": "arn:aws:payment-cryptography:us-east-2:111122223333:key/rhfm6tenpxapkmrv"
    }
}