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Fix for Extended APDUs #13

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@darconeous darconeous commented Mar 17, 2020

Not all Java Cards that support extended APDUs have APDU buffer lengths long enough to include the attestation certificate. This causes registration to fail when extended APDUs are used, as is the case with iOS.

The fix is to build the extended responses incrementally instead of staging them all at once in the APDU buffer.

Note that this fix alone is not enough to enable support for native iOS usage (although it is required to do so). See #12 for more information.

Not all Java Cards that support extended APDUs have APDU buffer
lengths long enough to include the attestation certificate. This
causes registration to fail when extended APDUs are used, as is the
case with iOS.

The fix is to build the extended responses incrementally instead of
staging them all at once in the APDU buffer.
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