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package space.anity
import java.io.*
import java.security.*
import javax.crypto.*
import javax.crypto.spec.*
class CryptoHandler @Throws(NoSuchPaddingException::class, NoSuchAlgorithmException::class)
internal constructor(private val secretKey: SecretKey, cipher: String) {
private val cipher: Cipher = Cipher.getInstance(cipher)
@Throws(InvalidKeyException::class, IOException::class)
internal fun encrypt(content: String, fileName: String): ByteArray {
cipher.init(Cipher.ENCRYPT_MODE, secretKey)
val iv: ByteArray = cipher.iv
FileOutputStream(fileName).use { fileOut ->
CipherOutputStream(fileOut, cipher).use { cipherOut ->
cipherOut.write(content.toByteArray())
}
}
return iv
}
@Throws(InvalidAlgorithmParameterException::class, InvalidKeyException::class, IOException::class)
internal fun decrypt(fileName: String, iv: ByteArray): String {
var content = ""
FileInputStream(fileName).use { fileIn ->
cipher.init(Cipher.DECRYPT_MODE, secretKey, IvParameterSpec(iv))
CipherInputStream(fileIn, cipher).use { cipherIn ->
InputStreamReader(cipherIn).use { inputReader ->
BufferedReader(inputReader).use { reader ->
val sb = StringBuilder()
var line: String? = reader.readLine()
while (line != null) {
sb.append(line)
line = reader.readLine()
}
content = sb.toString()
}
}
}
}
return content
}
}
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