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Cryptography service now handles random byte generation

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Protected strings are now protected in memory
This commit is contained in:
Geoffroy BONNEVILLE
2020-05-18 14:14:28 +02:00
parent ceaf7dabd3
commit 9126307b4c
22 changed files with 134 additions and 105 deletions
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35
ModernKeePass.Infrastructure/KeePass/MappingProfiles.cs
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@@ -2,6 +2,7 @@
using System.Collections.Generic;
using System.Linq;
using AutoMapper;
using ModernKeePass.Application.Common.Interfaces;
using ModernKeePass.Domain.Entities;
using ModernKeePassLib;
using ModernKeePassLib.Security;
@@ -14,32 +15,42 @@ namespace ModernKeePass.Infrastructure.KeePass
{
CreateMap<KeyValuePair<string, ProtectedString>, FieldEntity>()
.ForMember(dest => dest.Name, opt => opt.MapFrom(src => src.Key))
.ForMember(dest => dest.Value, opt => opt.MapFrom(src => src.Value.ReadString()))
.ForMember(dest => dest.Value, opt => opt.ResolveUsing<ProtectedStringResolver>())
.ForMember(dest => dest.IsProtected, opt => opt.MapFrom(src => src.Value.IsProtected));
CreateMap<PwEntry, EntryEntity>()
.ForMember(dest => dest.ParentId, opt => opt.MapFrom(src => src.ParentGroup.Uuid.ToHexString()))
.ForMember(dest => dest.ParentName, opt => opt.MapFrom(src => src.ParentGroup.Name))
.ForMember(dest => dest.ParentGroupId, opt => opt.MapFrom(src => src.ParentGroup.Uuid.ToHexString()))
.ForMember(dest => dest.Id, opt => opt.MapFrom(src => src.Uuid.ToHexString()))
.ForMember(dest => dest.Fields, opt => opt.MapFrom(src => src.Strings))
.ForMember(dest => dest.ForegroundColor, opt => opt.MapFrom(src => src.ForegroundColor))
.ForMember(dest => dest.BackgroundColor, opt => opt.MapFrom(src => src.BackgroundColor))
.ForMember(dest => dest.ExpirationDate, opt => opt.MapFrom(src => new DateTimeOffset(src.ExpiryTime)))
.ForMember(dest => dest.HasExpirationDate, opt => opt.MapFrom(src => src.Expires))
.ForMember(dest => dest.Icon, opt => opt.MapFrom(src => IconMapper.MapPwIconToIcon(src.IconId)))
.ForMember(dest => dest.LastModificationDate, opt => opt.MapFrom(src => new DateTimeOffset(src.LastModificationTime)))
.ForMember(dest => dest.ModificationDate, opt => opt.MapFrom(src => new DateTimeOffset(src.LastModificationTime)))
.ForMember(dest => dest.Attachments, opt => opt.MapFrom(src => src.Binaries.Select(b => new KeyValuePair<string, byte[]> (b.Key, b.Value.ReadData()) )));
CreateMap<PwGroup, GroupEntity>()
.ForMember(d => d.ParentId, opts => opts.MapFrom(s => s.ParentGroup.Uuid.ToHexString()))
.ForMember(d => d.ParentName, opts => opts.MapFrom(s => s.ParentGroup.Name))
.ForMember(d => d.ParentGroupId, opts => opts.MapFrom(s => s.ParentGroup.Uuid.ToHexString()))
.ForMember(d => d.Id, opts => opts.MapFrom(s => s.Uuid.ToHexString()))
.ForMember(d => d.Name, opts => opts.MapFrom(s => s.Name))
.ForMember(d => d.Icon, opts => opts.MapFrom(s => IconMapper.MapPwIconToIcon(s.IconId)))
.ForMember(d => d.LastModificationDate, opts => opts.MapFrom(s => s.LastModificationTime))
.ForMember(d => d.Entries, opts => opts.MapFrom(s => s.Entries))
.ForMember(d => d.SubGroups, opts => opts.MapFrom(s => s.Groups))
.ForMember(d => d.ModificationDate, opts => opts.MapFrom(s => s.LastModificationTime))
.MaxDepth(2);
}
}
public class ProtectedStringResolver : IValueResolver<KeyValuePair<string, ProtectedString>, FieldEntity, string>
{
private readonly ICryptographyClient _cryptography;
public ProtectedStringResolver(ICryptographyClient cryptography)
{
_cryptography = cryptography;
}
public string Resolve(KeyValuePair<string, ProtectedString> source, FieldEntity destination, string destMember, ResolutionContext context)
{
// TODO: this variable will contain (temporarily) the decrypted string
var decryptedString = source.Value.ReadString();
return source.Value.IsProtected ? _cryptography.Protect(decryptedString).GetAwaiter().GetResult() : decryptedString;
}
}
}