Table of Contents | ||||
---|---|---|---|---|
|
Basic transaction
A basic OLA transaction includes the following steps:
OLA classes instantiation (once at startup)
Code Block |
---|
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)
Code Block |
---|
/** * 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
Code Block |
---|
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
Code Block |
---|
private fun terminalPublicKeyConfig() { Log.v("Transaction", "terminalPublicKeyConfig") val publicKeyCfg = arrayOf( /* MasterCard */ PublicKeyCfg(byteArrayOf(0xa0.toByte(), 0x00, 0x00, 0x00, 0x03), 0x92.toByte(), byteArrayOf(0x99.toByte(), 0x6a, 0xf5.toByte(), 0x6f, 0x56, 0x91.toByte(), 0x87.toByte(), 0xd0.toByte(), 0x92.toByte(), 0x93.toByte(), 0xc1.toByte(), 0x48, 0x10, 0x45, 0x0e, 0xd8.toByte(), 0xee.toByte(), 0x33, 0x57, 0x39, 0x7b, 0x18, 0xa2.toByte(), 0x45, 0x8e.toByte(), 0xfa.toByte(), 0xa9.toByte(), 0x2d, 0xa3.toByte(), 0xb6.toByte(), 0xdf.toByte(), 0x65, 0x14, 0xec.toByte(), 0x06, 0x01, 0x95.toByte(), 0x31, 0x8f.toByte(), 0xd4.toByte(), 0x3b, 0xe9.toByte(), 0xb8.toByte(), 0xf0.toByte(), 0xcc.toByte(), 0x66, 0x9e.toByte(), 0x3f, 0x84.toByte(), 0x40, 0x57, 0xcb.toByte(), 0xdd.toByte(), 0xf8.toByte(), 0xbd.toByte(), 0xa1.toByte(), 0x91.toByte(), 0xbb.toByte(), 0x64, 0x47, 0x3b, 0xc8.toByte(), 0xdc.toByte(), 0x9a.toByte(), 0x73, 0x0d, 0xb8.toByte(), 0xf6.toByte(), 0xb4.toByte(), 0xed.toByte(), 0xe3.toByte(), 0x92.toByte(), 0x41, 0x86.toByte(), 0xff.toByte(), 0xd9.toByte(), 0xb8.toByte(), 0xc7.toByte(), 0x73, 0x57, 0x89.toByte(), 0xc2.toByte(), 0x3a, 0x36, 0xba.toByte(), 0x0b, 0x8a.toByte(), 0xf6.toByte(), 0x53, 0x72, 0xeb.toByte(), 0x57, 0xea.toByte(), 0x5d, 0x89.toByte(), 0xe7.toByte(), 0xd1.toByte(), 0x4e, 0x9c.toByte(), 0x7b, 0x6b, 0x55, 0x74, 0x60, 0xf1.toByte(), 0x08, 0x85.toByte(), 0xda.toByte(), 0x16, 0xac.toByte(), 0x92.toByte(), 0x3f, 0x15, 0xaf.toByte(), 0x37, 0x58, 0xf0.toByte(), 0xf0.toByte(), 0x3e, 0xbd.toByte(), 0x3c, 0x5c, 0x2c, 0x94.toByte(), 0x9c.toByte(), 0xba.toByte(), 0x30, 0x6d, 0xb4.toByte(), 0x4e, 0x6a, 0x2c, 0x07, 0x6c, 0x5f, 0x67, 0xe2.toByte(), 0x81.toByte(), 0xd7.toByte(), 0xef.toByte(), 0x56, 0x78, 0x5d, 0xc4.toByte(), 0xd7.toByte(), 0x59, 0x45, 0xe4.toByte(), 0x91.toByte(), 0xf0.toByte(), 0x19, 0x18, 0x80.toByte(), 0x0a, 0x9e.toByte(), 0x2d, 0xc6.toByte(), 0x6f, 0x60, 0x08, 0x05, 0x66, 0xce.toByte(), 0x0d, 0xaf.toByte(), 0x8d.toByte(), 0x17, 0xea.toByte(), 0xd4.toByte(), 0x6a, 0xd8.toByte(), 0xe3.toByte(), 0x0a, 0x24, 0x7c, 0x9f.toByte()), byteArrayOf(0x03), byteArrayOf(0x24, 0x12, 0x31)), ...) publicKey.flush() for (config in publicKeyCfg) { val maxReached = SingleObjectHolder(false) val key: PublicKeyData = publicKey.PublicKeyData( config.rid, config.idx, config.modulus, config.exponentValue, config.expirDate ) publicKey.add(key, null, maxReached) } publicKey.commit() } |
Transaction related data ()
Code Block |
---|
private fun txnSetTransactionRelatedData() { Log.v("Transaction", "txnSetTransactionRelatedData") emv.setTag(OlaTag.TRANSACTION_DATE, byteArrayOf(0x20, 0x10, 0x28)) // 9A emv.setTag(OlaTag.TRANSACTION_TIME, byteArrayOf(0x12, 0x00, 0x00)) // 9F21 emv.setTag(OlaTag.AMOUNT_AUTHORISED, byteArrayOf(0x00, 0x00, 0x00, 0x00, 0x01, 0x50)) // 9F02 emv.setTag(OlaTag.AMOUNT_OTHER_NUM, byteArrayOf(0x00, 0x00, 0x00, 0x00, 0x00, 0x50)) // 9F03 emv.setTag(OlaTag.TRANSACTION_CURRENCY_CODE, byteArrayOf(0x08, 0x40)) // 5F2A emv.setTag(OlaTag.TRANSACTION_CURRENCY_EXPONENT, byteArrayOf(0x02)) // 5F36 emv.setTag(OlaTag.TRANSACTION_TYPE, byteArrayOf(0x00)) // 9C /* * Other possible tags to set here: * Account Type (5F57) * Transaction Category Code (9F53) * * All other tags must be set through the combinations! */ emv.setTag(0x9F53, byteArrayOf(0x11)); } |
Preprocessing
Code Block |
---|
private fun txnPreProcess(): OlaError { Log.v("Transaction", "txnPreProcess") val ret = contactless.preprocess() if (ret != OlaError.OLA_OK) { Log.e("Transaction", "txnPreProcess - contactless pre-process failed") } return ret } |
Card detection
Code Block |
---|
private fun txnGetCard(): Int { Log.v("Transaction", "txnGetCard - **** PRESENT CARD ****") val foundTechnos = dev.technoPolling(30) Log.v("Transaction", "txnGetCard - result of foundTechnos: $foundTechnos") return if (foundTechnos == 4) { clcEMV_CARD //TODO remove hard-coding } else { 0 } } |
Do transaction
Code Block |
---|
private fun doTransaction(): OlaError { Log.v("Transaction", "doTransaction - buildCandidateList") val nbCandidatesHolder = SingleObjectHolder<Int>() var ret = contactless.buildCandidateList(nbCandidatesHolder) if (ret != OlaError.OLA_OK) { Outcome.showOutcome(contactless, ret) } Log.v("Transaction", "doTransaction - nb of candidates: ${nbCandidatesHolder.get()}") Log.v("Transaction", "doTransaction - finalSelectCandidate") val kernel_id_holder = SingleObjectHolder<Byte>() ret = contactless.finalSelectCandidate(1, kernel_id_holder) if (ret != OlaError.OLA_OK) { Outcome.showOutcome(contactless, ret) } Log.v("Transaction", "doTransaction - doTransaction") ret = contactless.doTransaction() Outcome.showOutcome(contactless, ret) if (ret == OlaError.OLA_OK) { val bytesHolder = SingleObjectHolder<ByteArray>() for (olaTag in batch) { val result = emv.getTag(olaTag, bytesHolder) if (result == OlaError.OLA_OK) { Log.v("Transaction", "doTransaction - result for getTag(): $result => " + Utils.bytesToHex(bytesHolder.get())) } else { Log.v("Transaction", "doTransaction - result for getTag(): $result => tag missing") } } } Log.d("Transaction", "doTransaction - **** REMOVE CARD **** ") contactless.clean(); return ret } |
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:
...
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:
...