FindTag searches for a tag value within a TLV sequence.

FindTagN searches for a tag value within a TLV sequence and returns the n occurrence.

NewCommand returns a new apdu Command.

NewErrBadResponse returns a ErrBadResponse with the specified sw and message values.

ParseCommand parses a raw command and returns a Command.

ParseResponse parses a raw response and return a Response.

SwOK is returned from smartcards as a positive response code.

ErrBadRawCommand is an error returned by ParseCommand in case the command data is not long enough.

ErrBadRawResponse is an error returned by ParseResponse in case the response data is not long enough.

Command struct represent the data sent as an APDU command with CLA, Ins, P1, P2, Lc, Data, and Le.

ErrBadResponse defines an error conaining the returned Sw code and a description message.

ErrTagNotFound is an error returned if a tag is not found in a TLV sequence.

Response represents a struct containing the smartcard response fields.