public boolean compareRawMethodsOnEncrStream(XStorage xStorage, String sStreamName) {
XStorageRawAccess xRawStorage;
try {
xRawStorage =
(XStorageRawAccess) UnoRuntime.queryInterface(XStorageRawAccess.class, xStorage);
} catch (Exception e) {
Error("Can't get raw access to the storage, exception : " + e + "!");
return false;
}
if (xRawStorage == null) {
Error("Can't get raw access to the storage!");
return false;
}
XInputStream xHeadRawStream = null;
try {
xHeadRawStream = xRawStorage.getRawEncrStreamElement(sStreamName);
} catch (Exception e) {
Error(
"Can't open encrypted stream '"
+ sStreamName
+ "' in raw mode with header, exception : "
+ e
+ "!");
}
XInputStream xPlainRawStream = null;
try {
xPlainRawStream = xRawStorage.getPlainRawStreamElement(sStreamName);
} catch (Exception e) {
Error(
"Can't open encrypted stream '"
+ sStreamName
+ "' in raw mode with header, exception : "
+ e
+ "!");
}
if (xHeadRawStream == null || xPlainRawStream == null) {
Error("Can't open encrypted stream '" + sStreamName + "' in raw modes!");
return false;
}
try {
byte pData[][] = new byte[1][38];
if (xHeadRawStream.readBytes(pData, 38) != 38) {
Error("Can't read header of encrypted stream '" + sStreamName + "' raw representations!");
return false;
}
if (pData[0][0] != 0x4d
|| pData[0][1] != 0x4d
|| pData[0][2] != 0x02
|| pData[0][3] != 0x05) {
Error(
"No signature in the header of encrypted stream '"
+ sStreamName
+ "' raw representations!");
return false;
}
int nVariableHeaderLength =
(pData[0][30] + pData[0][31] * 0x100) // salt length
+ (pData[0][32] + pData[0][33] * 0x100) // iv length
+ (pData[0][34] + pData[0][35] * 0x100) // digest length
+ (pData[0][36] + pData[0][37] * 0x100); // mediatype length
xHeadRawStream.skipBytes(nVariableHeaderLength);
byte pRawData1[][] = new byte[1][32000];
byte pRawData2[][] = new byte[1][32000];
int nRead1 = 0;
int nRead2 = 0;
do {
nRead1 = xHeadRawStream.readBytes(pRawData1, 32000);
nRead2 = xPlainRawStream.readBytes(pRawData2, 32000);
if (nRead1 != nRead2) {
Error(
"The encrypted stream '"
+ sStreamName
+ "' raw representations have different size! nRead1 - nRead2 = "
+ (new Integer(nRead1 - nRead2)).toString());
return false;
}
for (int nInd = 0; nInd < nRead1; nInd++)
if (pRawData1[0][nInd] != pRawData2[0][nInd]) {
Error(
"The encrypted stream '"
+ sStreamName
+ "' raw representations have different data!");
return false;
}
} while (nRead1 == 32000);
} catch (Exception e) {
Error(
"Can't compare stream '" + sStreamName + "' raw representations, exception : " + e + "!");
return false;
}
return true;
}
