//class
public static void DecodeByteCounts(byte[] bytes, uint offset, out uint saltBytesCount, out uint initiaVectorBytesCount)
{
if (BytesHelper.IsNullOrEmptyArray(bytes) == true ||
bytes.Length - offset < 2 * sizeof(uint))
{
throw new ArgumentException(
string.Format("bytes array should have {0} bytes at least.",
2 * sizeof(uint)));
}
saltBytesCount = BytesHelper.GetUInt32(bytes, offset);
initiaVectorBytesCount = BytesHelper.GetUInt32(bytes, offset + sizeof(uint));
}
public static SecureHead Decode(byte[] bytes, uint offset, uint saltBytesCount, uint initiaVectorBytesCount)
{
uint totalBytesCount = GetPart2BytesCount() + saltBytesCount + initiaVectorBytesCount;
if (BytesHelper.IsNullOrEmptyArray(bytes) == true ||
bytes.Length - offset < totalBytesCount)
{
throw new ArgumentException(
string.Format("bytes array should have {0} bytes at least.",
totalBytesCount));
}
//part 2 (4 uints):
uint beginIndex = offset;
uint length = sizeof(uint);
uint saltIterations = BytesHelper.GetUInt32(bytes, beginIndex);
beginIndex += length;
length = sizeof(uint);
uint saltedInitiaVectorBytesCount = BytesHelper.GetUInt32(bytes, beginIndex);
beginIndex += length;
length = sizeof(uint);
uint saltedPasswordBytesCount = BytesHelper.GetUInt32(bytes, beginIndex);
beginIndex += length;
length = sizeof(uint);
uint secureDataBytes = BytesHelper.GetUInt32(bytes, beginIndex);
//part 3 (2 byte arraries):
beginIndex += length;
length = saltBytesCount;
string salt = BytesHelper.GetUTF8String(bytes, beginIndex, length);
beginIndex += length;
length = initiaVectorBytesCount;
string initiaVector = BytesHelper.GetUTF8String(bytes, beginIndex, length);
return(new SecureHead(
salt,
initiaVector,
saltIterations,
saltedInitiaVectorBytesCount,
saltedPasswordBytesCount,
secureDataBytes));
}
