File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
File name
Commit message
Commit date
package kr.co.tadadang.user.util
import android.content.Context
import android.content.ContextWrapper
import android.content.pm.PackageManager
import android.os.Build
import android.util.Base64
import android.util.Log
import java.nio.charset.StandardCharsets
import java.security.MessageDigest
import java.security.NoSuchAlgorithmException
import java.util.Arrays
class AppSignatureHelper(context: Context) : ContextWrapper(context) {
val TAG = AppSignatureHelper::class.java.simpleName
private val HASH_TYPE = "SHA-256"
val NUM_HASHED_BYTES = 9
val NUM_BASE64_CHAR = 11
init {
getAppSignatures()
}
fun getAppSignatures(): ArrayList<String>? {
val appCodes = ArrayList<String>()
try {
val packageName = packageName
val packageManager = packageManager
val signatures: Array<out android.content.pm.Signature>? =
packageManager.getPackageInfo(
packageName,
PackageManager.GET_SIGNATURES
).signatures
if (signatures != null) {
for (signature in signatures) {
val hash = hash(packageName, signature.toCharsString())
if (hash != null) {
appCodes.add(String.format("%s", hash))
}
Log.e(TAG, "Hash $hash")
}
}
} catch (e: PackageManager.NameNotFoundException) {
Log.e(TAG, e.toString())
}
return appCodes
}
private fun hash(packageName: String, signature: String): String? {
val appInfo = "$packageName $signature"
try {
val messageDigest = MessageDigest.getInstance(HASH_TYPE)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
messageDigest.update(appInfo.toByteArray(StandardCharsets.UTF_8))
}
var hashSignature = messageDigest.digest()
hashSignature = Arrays.copyOfRange(hashSignature, 0, NUM_HASHED_BYTES)
var base64Hash: String =
Base64.encodeToString(hashSignature, Base64.NO_PADDING or Base64.NO_WRAP)
base64Hash = base64Hash.substring(0, NUM_BASE64_CHAR)
return base64Hash
} catch (e: NoSuchAlgorithmException) {
Log.e(TAG, e.toString())
}
return null
}
}