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Updated on 2026-08-14

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This commit is contained in:
Tangem 2019-11-25 13:53:30 +03:00
parent fe16bb4bcf
commit 8d716f97ed
11 changed files with 256 additions and 41 deletions
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27
tangem-core/src/main/java/com/tangem/CardManager.kt
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@ -1,9 +1,6 @@
package com.tangem
import com.tangem.commands.CommandResponse
import com.tangem.commands.CommandSerializer
import com.tangem.commands.SignCommand
import com.tangem.commands.SignResponse
import com.tangem.commands.*
import com.tangem.crypto.CryptoUtils
import com.tangem.tasks.*
import java.util.concurrent.Executors
@ -81,6 +78,28 @@ class CardManager(
runTask(task, cardId, callback)
}
fun readIssuerData(cardId: String,
callback: (result: TaskEvent<ReadIssuerDataResponse>) -> Unit) {
val getIssuerDataCommand = ReadIssuerDataCommand(cardId)
val task = SingleCommandTask(getIssuerDataCommand)
runTask(task, cardId, callback)
}
fun writeIssuerData(cardId: String,
issuerData: ByteArray,
issuerDataSignature: ByteArray,
issuerDataCounter: Int? = null,
callback: (result: TaskEvent<WriteIssuerDataResponse>) -> Unit) {
val writeIssuerDataCommand = WriteIssuerDataCommand(
cardId,
issuerData,
issuerDataSignature,
issuerDataCounter)
val task = SingleCommandTask(writeIssuerDataCommand)
runTask(task, cardId, callback)
}
/**
*/

78
tangem-core/src/main/java/com/tangem/commands/ReadIssuerDataCommand.kt Normal file
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@ -0,0 +1,78 @@
package com.tangem.commands
import com.tangem.CardEnvironment
import com.tangem.common.apdu.CommandApdu
import com.tangem.common.apdu.Instruction
import com.tangem.common.apdu.ResponseApdu
import com.tangem.common.extensions.calculateSha256
import com.tangem.common.extensions.hexToBytes
import com.tangem.common.tlv.Tlv
import com.tangem.common.tlv.TlvMapper
import com.tangem.common.tlv.TlvTag
import com.tangem.tasks.TaskError
class ReadIssuerDataResponse(
/**
* CID, Unique Tangem card ID number.
*/
val cardId: String,
/**
* Data defined by issuer.
*/
val issuerData: ByteArray,
/**
* Issuer’s signature of [issuerData] with Issuer Data Private Key (which is kept on card).
* Issuer’s signature of SHA256-hashed [cardId] concatenated with [issuerData]:
* SHA256([cardId] | [issuerData]).
* When flag [SettingsMask.protectIssuerDataAgainstReplay] set in [SettingsMask] then signature of
* SHA256-hashed CID Issuer_Data concatenated with and [issuerDataCounter]:
* SHA256([cardId] | [issuerData] | [issuerDataCounter]).
*/
val issuerDataSignature: ByteArray,
/**
* An optional counter that protect issuer data against replay attack.
* When flag [SettingsMask.protectIssuerDataAgainstReplay] set in [SettingsMask]
* then this value is mandatory and must increase on each execution of [WriteIssuerDataCommand].
*/
val issuerDataCounter: Int?
) : CommandResponse
/**
* This command returns 512-byte Issuer Data field and its issuer’s signature.
* Issuer Data is never changed or parsed from within the Tangem COS. The issuer defines purpose of use,
* format and payload of Issuer Data. For example, this field may contain information about
* wallet balance signed by the issuer or additional issuer’s attestation data.
*/
class ReadIssuerDataCommand(
private val cardId: String
) : CommandSerializer<ReadIssuerDataResponse>() {
override fun serialize(cardEnvironment: CardEnvironment): CommandApdu {
val tlvData = listOf(
Tlv(TlvTag.Pin, cardEnvironment.pin1.calculateSha256()),
Tlv(TlvTag.CardId, cardId.hexToBytes())
)
return CommandApdu(Instruction.ReadIssuerData, tlvData)
}
override fun deserialize(cardEnvironment: CardEnvironment, responseApdu: ResponseApdu): ReadIssuerDataResponse? {
val tlvData = responseApdu.getTlvData() ?: return null
return try {
val mapper = TlvMapper(tlvData)
ReadIssuerDataResponse(
cardId = mapper.map(TlvTag.CardId),
issuerData = mapper.map(TlvTag.IssuerData),
issuerDataSignature = mapper.map(TlvTag.IssuerDataSignature),
issuerDataCounter = mapper.mapOptional(TlvTag.IssuerDataCounter)
)
} catch (exception: Exception) {
throw TaskError.SerializeCommandError()
}
}
}

61
tangem-core/src/main/java/com/tangem/commands/WriteIssuerDataCommand.kt Normal file
View file

@ -0,0 +1,61 @@
package com.tangem.commands
import com.tangem.CardEnvironment
import com.tangem.common.apdu.CommandApdu
import com.tangem.common.apdu.Instruction
import com.tangem.common.apdu.ResponseApdu
import com.tangem.common.extensions.calculateSha256
import com.tangem.common.extensions.hexToBytes
import com.tangem.common.extensions.toByteArray
import com.tangem.common.tlv.Tlv
import com.tangem.common.tlv.TlvMapper
import com.tangem.common.tlv.TlvTag
import com.tangem.tasks.TaskError
class WriteIssuerDataResponse(
/**
* CID, Unique Tangem card ID number.
*/
val cardId: String
) : CommandResponse
/**
* This command writes 512-byte Issuer Data field and its issuer’s signature.
* Issuer Data is never changed or parsed from within the Tangem COS. The issuer defines purpose of use,
* format and payload of Issuer Data. For example, this field may contain information about
* wallet balance signed by the issuer or additional issuer’s attestation data.
*/
class WriteIssuerDataCommand(
private val cardId: String,
private val issuerData: ByteArray,
private val issuerDataSignature: ByteArray,
private val issuerDataCounter: Int? = null
) : CommandSerializer<WriteIssuerDataResponse>() {
override fun serialize(cardEnvironment: CardEnvironment): CommandApdu {
val tlvData = mutableListOf(
Tlv(TlvTag.Pin, cardEnvironment.pin1.calculateSha256()),
Tlv(TlvTag.CardId, cardId.hexToBytes()),
Tlv(TlvTag.IssuerData, issuerData),
Tlv(TlvTag.IssuerDataSignature, issuerDataSignature)
)
if (issuerDataCounter != null) {
tlvData.add(Tlv(TlvTag.IssuerDataCounter, issuerDataCounter.toByteArray()))
}
return CommandApdu(Instruction.WriteIssuerData, tlvData)
}
override fun deserialize(cardEnvironment: CardEnvironment, responseApdu: ResponseApdu): WriteIssuerDataResponse? {
val tlvData = responseApdu.getTlvData() ?: return null
return try {
val mapper = TlvMapper(tlvData)
WriteIssuerDataResponse(
cardId = mapper.map(TlvTag.CardId)
)
} catch (exception: Exception) {
throw TaskError.SerializeCommandError()
}
}
}

2
tangem-core/src/main/java/com/tangem/common/apdu/Instruction.kt
View file

@ -11,7 +11,7 @@ enum class Instruction(var code: Int) {
ValidateCard(0xF4),
VerifyCode(0xF5),
WriteIssuerData(0xF6),
GetIssuerData(0xF7),
ReadIssuerData(0xF7),
CreateWallet(0xF8),
CheckWallet(0xF9),
SwapPIN(0xFA),

1
tangem-core/src/main/java/com/tangem/common/extensions/ByteArray.kt
View file

@ -33,3 +33,4 @@ fun ByteArray.toDate(): Date {
fun ByteArray.calculateSha512(): ByteArray = MessageDigest.getInstance("SHA-512").digest(this)
fun ByteArray.calculateSha256(): ByteArray = MessageDigest.getInstance("SHA-256").digest(this)

10
tangem-core/src/main/java/com/tangem/common/extensions/IntExtensions.kt Normal file
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@ -0,0 +1,10 @@
package com.tangem.common.extensions
import java.nio.ByteBuffer
fun Int.toByteArray(): ByteArray {
val bufferSize = Int.SIZE_BYTES
val buffer = ByteBuffer.allocate(bufferSize)
buffer.putInt(this)
return buffer.array()
}