Amadis
Agnos - Transaction sample code
- Alexandre Munsch (Unlicensed)
Basic transaction
A basic OLA transaction includes the following steps:
OLA classes instantiation (once at startup)
private val ola: Ola
private val contact: OlaContact
private val contactless: OlaContactless
private val emv: OlaEmv
private val dev: Dev
private val publicKey: OlaPublicKey
...
init {
ola = Ola.getInstance()
contact = OlaContact.getInstance()
contactless = OlaContactless.getInstance()
emv = OlaEmv.getInstance()
publicKey = OlaPublicKey()
...
}OLA component initialisation (once at startup)
/**
* Configures OLA layer (key files paths, trace, etc...)
*/
private fun olaConfig() {
val path = byteArrayOf(0xdf.toByte(), 0x01, 28)
val pathValue = "/data/data/ca.amadis.tester/"
val cakeys = byteArrayOf(0xdf.toByte(), 0x02, 34)
val cakeysValue = "/data/data/ca.amadis.tester/CAKeys"
val crl = byteArrayOf(0xdf.toByte(), 0x03, 31)
val crlValue = "/data/data/ca.amadis.tester/CRL"
val efl = byteArrayOf(0xdf.toByte(), 0x04, 31)
val eflValue = "/data/data/ca.amadis.tester/EFL"
val pcsc = byteArrayOf(0xdf.toByte(), 0x05, 0x00) // pcsc not used
val lang = byteArrayOf(0xdf.toByte(), 0x06, 0x00) // lang not used
val runtimeParams = byteArrayOf(0xdf.toByte(), 0x07, 0x07, 0x00, 0x0F, 0x04, 0x0F, 0x0A, 0x00, 0x01)
val traceLevel = byteArrayOf(0xdf.toByte(), 0x08, 0x01, 0x05)
val pollingTechno = byteArrayOf(0xdf.toByte(), 0x10, 0x01, 0x04) // Contactless only
var sredMode: ByteArray
if (BuildConfig.FLAVOR.lowercase().contains("nosred")) {
sredMode = byteArrayOf(0xdf.toByte(), 0x17, 0x01, 0x00) // SRED mode not active
} else {
sredMode = byteArrayOf(0xdf.toByte(), 0x17, 0x01, 0x01) // SRED mode active
}
try {
val out = ByteArrayOutputStream()
out.write(path)
out.write(pathValue.toByteArray())
out.write(cakeys)
out.write(cakeysValue.toByteArray())
out.write(crl)
out.write(crlValue.toByteArray())
out.write(efl)
out.write(eflValue.toByteArray())
out.write(pcsc)
out.write(lang)
out.write(runtimeParams)
out.write(traceLevel)
out.write(pollingTechno)
out.write(sredMode)
ola.initializeAtStartUp(out.toByteArray())
} catch (e: IOException) {
}
}AID configuration
private fun terminalContactlessConfig() {
Log.v("Transaction", "terminalContactlessConfig")
val contactlessCfg = arrayOf(
ContactlessCfg(AID.FromBytes(byteArrayOf(0xA0.toByte(), 0x00, 0x00, 0x00, 0x04, 0x10, 0x10)),
true,
2,
mcCfg),
ContactlessCfg(AID.FromBytes(byteArrayOf(0xA0.toByte(), 0x00, 0x00, 0x00, 0x04, 0x20, 0x10)),
true,
2,
mcCfg),
...)
contactless.flushAIDSupported()
for (config in contactlessCfg) {
contactless.addAIDSupported(
config.aid,
config.partial,
config.kernelId.toByte(),
config.additionalData
)
}
contactless.commitSupportedAIDs()
}Keys configuration
Transaction related data ()
Preprocessing
Card detection
Do transaction
Outcome and errors management
At the end of a transaction, the OlaOutcomeParameter structure should be retrieved for analysis. To retrieve the outcome, use the following code:
Please refer to the Javadoc/Kotlindoc for more information on the OlaOutcomeParameter class.
The first element to verify is the value of the outcome member. In a Tap to Phone environement, its value should be either of the following:
SelectNext,
TryAgain,
Declined
OnlineRequest,
EndApplication
The transaction should never be accepted offline.
EndApplication outcome
In case the outcome is EndApplication, the application should look into OlaErrorIndicator element to understand what possibly caused the premature end of the transaction. To retrieve that information, one should use the following API:
The OlaErrorIndicator class contains different levels of errors represented by the following members:
Only one of them can be filled at once.
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