コード例 #1
0
        public byte[] GetBytes(FileStream isoStream, long volumeOffset,
                               long dataOffset, long blockOffset, long size, byte[] partitionKey)
        {
            byte[] value = new byte[size];
            byte[] encryptedPartitionCluster;
            byte[] encryptedClusterDataSection;
            byte[] decryptedClusterDataSection;
            byte[] clusterIV;

            long bufferLocation = 0;
            long maxCopySize;
            long copySize;

            while (size > 0)
            {
                // get block offset info
                NintendoWiiOpticalDisc.WiiBlockStructure blockStructure =
                    NintendoWiiOpticalDisc.GetWiiBlockStructureForOffset(blockOffset);

                // read current block
                //encryptedPartitionCluster = ParseFile.ParseSimpleOffset(isoStream,
                //    volumeOffset + dataOffset + (blockStructure.BlockNumber * 0x8000),
                //    0x8000);

                if (this.CurrentDecryptedBlockNumber != blockStructure.BlockNumber)
                {
                    encryptedPartitionCluster = ParseFile.ParseSimpleOffset(isoStream,
                                                                            volumeOffset + dataOffset + (blockStructure.BlockNumber * 0x8000),
                                                                            0x8000);

                    clusterIV = ParseFile.ParseSimpleOffset(encryptedPartitionCluster, 0x03D0, 0x10);
                    encryptedClusterDataSection = ParseFile.ParseSimpleOffset(encryptedPartitionCluster, 0x400, 0x7C00);
                    decryptedClusterDataSection = AESEngine.Decrypt(this.Algorithm, encryptedClusterDataSection,
                                                                    partitionKey, clusterIV, CipherMode.CBC, PaddingMode.Zeros);

                    this.CurrentDecryptedBlock       = decryptedClusterDataSection;
                    this.CurrentDecryptedBlockNumber = blockStructure.BlockNumber;
                }

                // copy the decrypted data
                maxCopySize = 0x7C00 - blockStructure.BlockOffset;
                copySize    = (size > maxCopySize) ? maxCopySize : size;
                Array.Copy(this.CurrentDecryptedBlock, blockStructure.BlockOffset,
                           value, bufferLocation, copySize);

                // update counters
                size           -= copySize;
                bufferLocation += copySize;
                blockOffset    += copySize;
            }

            return(value);
        }
コード例 #2
0
        public void ExtractFile(FileStream isoStream, string destinationPath, long volumeOffset,
                                long dataOffset, long blockOffset, long size, byte[] partitionKey)
        {
            byte[] value = new byte[0x7C00];
            byte[] encryptedPartitionCluster;
            byte[] encryptedClusterDataSection;
            byte[] decryptedClusterDataSection;
            byte[] clusterIV;

            long maxCopySize;
            long copySize;

            // create destination
            string destintionDirectory = Path.GetDirectoryName(destinationPath);

            if (!Directory.Exists(destintionDirectory))
            {
                Directory.CreateDirectory(destintionDirectory);
            }

            using (FileStream outStream = File.Open(destinationPath, FileMode.Create, FileAccess.Write))
            {
                while (size > 0)
                {
                    try
                    {
                        // get block offset info
                        NintendoWiiOpticalDisc.WiiBlockStructure blockStructure =
                            NintendoWiiOpticalDisc.GetWiiBlockStructureForOffset(blockOffset);

                        // read current block
                        //encryptedPartitionCluster = ParseFile.ParseSimpleOffset(isoStream,
                        //    volumeOffset + dataOffset + (blockStructure.BlockNumber * 0x8000),
                        //    0x8000);

                        if (this.CurrentDecryptedBlockNumber != blockStructure.BlockNumber)
                        {
                            encryptedPartitionCluster = ParseFile.ParseSimpleOffset(isoStream,
                                                                                    volumeOffset + dataOffset + (blockStructure.BlockNumber * 0x8000),
                                                                                    0x8000);

                            if (encryptedPartitionCluster.Length == 0)
                            {
                                throw new Exception(String.Format("Encrypted cluster 0x{0) has size zero.  This image is probably corrupt.", blockStructure.BlockNumber.ToString("X8")));
                            }
                            else
                            {
                                clusterIV = ParseFile.ParseSimpleOffset(encryptedPartitionCluster, 0x03D0, 0x10);
                                encryptedClusterDataSection = ParseFile.ParseSimpleOffset(encryptedPartitionCluster, 0x400, 0x7C00);
                                decryptedClusterDataSection = AESEngine.Decrypt(this.Algorithm, encryptedClusterDataSection,
                                                                                partitionKey, clusterIV, CipherMode.CBC, PaddingMode.Zeros);

                                this.CurrentDecryptedBlock       = decryptedClusterDataSection;
                                this.CurrentDecryptedBlockNumber = blockStructure.BlockNumber;
                            }
                        }

                        // copy the encrypted data
                        maxCopySize = 0x7C00 - blockStructure.BlockOffset;
                        copySize    = (size > maxCopySize) ? maxCopySize : size;
                        outStream.Write(this.CurrentDecryptedBlock, (int)blockStructure.BlockOffset, (int)copySize);

                        // update counters
                        size        -= copySize;
                        blockOffset += copySize;
                    }
                    catch (Exception ie)
                    {
                        throw ie;
                    }
                }
            }
        }