public byte[] AddMetadataHeader(VaultMetadata metadata, byte[] encryptedVaultBytes)
{
byte[] metadataBytes = CreateVaultMetadataHeader(metadata);
byte[] finalBytes = new byte[metadataBytes.Length + encryptedVaultBytes.Length + this.HeaderSeperator.Length];
metadataBytes.CopyTo(finalBytes, 0);
HeaderSeperator.CopyTo(finalBytes, metadataBytes.Length);
encryptedVaultBytes.CopyTo(finalBytes, metadataBytes.Length + HeaderSeperator.Length);
return(finalBytes);
}
private byte[] CreateVaultMetadataHeader(VaultMetadata vaultMetadata)
{
int versionBytesCount = sizeof(long);
var versionBytes = BitConverter.GetBytes(vaultMetadata.Version);
var createLocationBytes = BitConverter.GetBytes((int)vaultMetadata.CreateLocation);
var headerBytes = new byte[TotalHeaderLength];
versionBytes.CopyTo(headerBytes, 0);
createLocationBytes.CopyTo(headerBytes, versionBytesCount);
return(headerBytes);
}
public VaultMetadata GetVaultFileMetadata(byte[] vaultFileBytesWithMetadata)
{
int versionBytesCount = sizeof(long);
int createLocationBytesCount = sizeof(int);
byte[] metadataBytes = GetVaultFileMetadataHeader(vaultFileBytesWithMetadata);
var result = new VaultMetadata();
if (metadataBytes != null)
{
var versionBytes = metadataBytes.Take(versionBytesCount).ToArray();
var createLocationBytes = metadataBytes.Skip(versionBytesCount).Take(createLocationBytesCount).ToArray();
result.Version = BitConverter.ToInt64(versionBytes, 0);
result.CreateLocation = (VaultCreateLocation)BitConverter.ToInt32(createLocationBytes, 0);
}
return(result);
}
