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Concept of encrypting int values #16

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Concept of encrypting int values #16

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7 changes: 7 additions & 0 deletions EntityFramework.Core.EncryptDBColumn/Converter/EncryptionConverter.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,4 +9,11 @@ public EncryptionConverter(IEncryptionProvider encryptionProvider, ConverterMapp
{
}
}

internal sealed class IntEncryptionConverter : ValueConverter<int, string>
{
public IntEncryptionConverter(IEncryptionProvider encryptionProvider, ConverterMappingHints mappingHints = null) : base(x => encryptionProvider.EncryptInt(x), x => encryptionProvider.DecryptInt(x), mappingHints)
{
}
}
}
8 changes: 8 additions & 0 deletions EntityFramework.Core.EncryptDBColumn/Extension/ModelBuilderExtension.cs
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Expand Up @@ -19,6 +19,7 @@ public static void UseEncryption(this ModelBuilder modelBuilder, IEncryptionProv
throw new ArgumentNullException(nameof(encryptionProvider), "You should create encryption provider.");

var encryptionConverter = new EncryptionConverter(encryptionProvider);
var intEncryptionConverter = new IntEncryptionConverter(encryptionProvider);
foreach (IMutableEntityType entityType in modelBuilder.Model.GetEntityTypes())
{
foreach (IMutableProperty property in entityType.GetProperties())
Expand All @@ -29,6 +30,13 @@ public static void UseEncryption(this ModelBuilder modelBuilder, IEncryptionProv
if(attributes.Any())
property.SetValueConverter(encryptionConverter);
}

if((property.ClrType == typeof(int) || property.ClrType == typeof(int?)) && !IsDiscriminator(property))
{
object[] attributes = property.PropertyInfo.GetCustomAttributes(typeof(EncryptColumnAttribute), false);
if (attributes.Any())
property.SetValueConverter(intEncryptionConverter);
}
}
}

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3 changes: 3 additions & 0 deletions EntityFramework.Core.EncryptDBColumn/Interfaces/IEncryptionProvider.cs
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Expand Up @@ -5,5 +5,8 @@ public interface IEncryptionProvider
{
string Encrypt(string dataToEncrypt);
string Decrypt(string dataToDecrypt);

string EncryptInt(int dataToEncrypt);
int DecryptInt(string dataToDecrypt);
}
}
10 changes: 10 additions & 0 deletions EntityFramework.Core.EncryptDBColumn/Util/GenerateEncryptionProvider.cs
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Expand Up @@ -76,5 +76,15 @@ public string Decrypt(string dataToDecrypt)
}
}
}

public string EncryptInt(int dataToEncrypt)
{
return Encrypt(dataToEncrypt.ToString());
}

public int DecryptInt(string dataToDecrypt)
{
return int.Parse(Decrypt(dataToDecrypt));
}
}
}