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Simpler method

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This commit is contained in:
J-Jamet
2021-03-24 11:29:15 +01:00
parent d28a59a2fe
commit 78f707c07c
1 changed files with 43 additions and 53 deletions
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96
app/src/main/java/com/kunzisoft/keepass/database/file/input/DatabaseInputKDBX.kt
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@@ -155,7 +155,7 @@ class DatabaseInputKDBX(cacheDirectory: File,
val isPlain: InputStream
if (mDatabase.kdbxVersion.toKotlinLong() < DatabaseHeaderKDBX.FILE_VERSION_32_4.toKotlinLong()) {
val decrypted = attachCipherStream(databaseInputStream, cipher)
val decrypted = CipherInputStream(databaseInputStream, cipher)
val dataDecrypted = LittleEndianDataInputStream(decrypted)
val storedStartBytes: ByteArray?
try {
@@ -192,17 +192,16 @@ class DatabaseInputKDBX(cacheDirectory: File,
val hmIs = HmacBlockInputStream(isData, true, hmacKey)
isPlain = attachCipherStream(hmIs, cipher)
isPlain = CipherInputStream(hmIs, cipher)
}
val inputStreamXml: InputStream
inputStreamXml = when (mDatabase.compressionAlgorithm) {
val inputStreamXml: InputStream = when (mDatabase.compressionAlgorithm) {
CompressionAlgorithm.GZip -> GZIPInputStream(isPlain)
else -> isPlain
}
if (mDatabase.kdbxVersion.toKotlinLong() >= DatabaseHeaderKDBX.FILE_VERSION_32_4.toKotlinLong()) {
loadInnerHeader(inputStreamXml, header)
readInnerHeader(inputStreamXml, header)
}
try {
@@ -231,66 +230,57 @@ class DatabaseInputKDBX(cacheDirectory: File,
return mDatabase
}
private fun attachCipherStream(inputStream: InputStream, cipher: Cipher): InputStream {
return CipherInputStream(inputStream, cipher)
}
@Throws(IOException::class)
private fun loadInnerHeader(inputStream: InputStream, header: DatabaseHeaderKDBX) {
val lis = LittleEndianDataInputStream(inputStream)
private fun readInnerHeader(inputStream: InputStream,
header: DatabaseHeaderKDBX) {
while (true) {
if (!readInnerHeader(lis, header)) break
}
}
val dataInputStream = LittleEndianDataInputStream(inputStream)
@Throws(IOException::class)
private fun readInnerHeader(dataInputStream: LittleEndianDataInputStream,
header: DatabaseHeaderKDBX): Boolean {
val fieldId = dataInputStream.read().toByte()
var readStream = true
while (readStream) {
val fieldId = dataInputStream.read().toByte()
val size = dataInputStream.readUInt().toKotlinInt()
if (size < 0) throw IOException("Corrupted file")
val size = dataInputStream.readUInt().toKotlinInt()
if (size < 0) throw IOException("Corrupted file")
var data = ByteArray(0)
try {
if (size > 0) {
if (fieldId != DatabaseHeaderKDBX.PwDbInnerHeaderV4Fields.Binary) {
data = dataInputStream.readBytes(size)
var data = ByteArray(0)
try {
if (size > 0) {
if (fieldId != DatabaseHeaderKDBX.PwDbInnerHeaderV4Fields.Binary) {
data = dataInputStream.readBytes(size)
}
}
} catch (e: Exception) {
// OOM only if corrupted file
throw IOException("Corrupted file")
}
} catch (e: Exception) {
// OOM only if corrupted file
throw IOException("Corrupted file")
}
var result = true
when (fieldId) {
DatabaseHeaderKDBX.PwDbInnerHeaderV4Fields.EndOfHeader -> {
result = false
}
DatabaseHeaderKDBX.PwDbInnerHeaderV4Fields.InnerRandomStreamID -> {
header.setRandomStreamID(data)
}
DatabaseHeaderKDBX.PwDbInnerHeaderV4Fields.InnerRandomstreamKey -> {
header.innerRandomStreamKey = data
}
DatabaseHeaderKDBX.PwDbInnerHeaderV4Fields.Binary -> {
// Read in a file
val protectedFlag = dataInputStream.read().toByte() == DatabaseHeaderKDBX.KdbxBinaryFlags.Protected
val byteLength = size - 1
// No compression at this level
val protectedBinary = mDatabase.buildNewAttachment(
isRAMSufficient.invoke(byteLength.toLong()), false, protectedFlag)
protectedBinary.getOutputDataStream(mDatabase.binaryCache).use { outputStream ->
dataInputStream.readBytes(byteLength) { buffer ->
outputStream.write(buffer)
readStream = true
when (fieldId) {
DatabaseHeaderKDBX.PwDbInnerHeaderV4Fields.EndOfHeader -> {
readStream = false
}
DatabaseHeaderKDBX.PwDbInnerHeaderV4Fields.InnerRandomStreamID -> {
header.setRandomStreamID(data)
}
DatabaseHeaderKDBX.PwDbInnerHeaderV4Fields.InnerRandomstreamKey -> {
header.innerRandomStreamKey = data
}
DatabaseHeaderKDBX.PwDbInnerHeaderV4Fields.Binary -> {
// Read in a file
val protectedFlag = dataInputStream.read().toByte() == DatabaseHeaderKDBX.KdbxBinaryFlags.Protected
val byteLength = size - 1
// No compression at this level
val protectedBinary = mDatabase.buildNewAttachment(
isRAMSufficient.invoke(byteLength.toLong()), false, protectedFlag)
protectedBinary.getOutputDataStream(mDatabase.binaryCache).use { outputStream ->
dataInputStream.readBytes(byteLength) { buffer ->
outputStream.write(buffer)
}
}
}
}
}
return result
}
private enum class KdbContext {