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extend crypto service for org keys

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This commit is contained in:
Kyle Spearrin 2017-04-20 10:20:24 -04:00
parent 4c2bcb9e6b
commit 58c5c55d09
2 changed files with 104 additions and 14 deletions
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9
src/App/Abstractions/Services/ICryptoService.cs
View File

@ -1,4 +1,6 @@
using Bit.App.Models;
using System;
using System.Collections.Generic;
namespace Bit.App.Abstractions
{
@ -7,7 +9,14 @@ namespace Bit.App.Abstractions
CryptoKey Key { get; set; }
CryptoKey PreviousKey { get; }
bool KeyChanged { get; }
byte[] PrivateKey { get; set; }
IDictionary<Guid, CryptoKey> OrgKeys { get; set; }
void SetPrivateKey(CipherString privateKeyEnc, CryptoKey key);
CryptoKey GetOrgKey(Guid orgId);
void ClearOrgKey(Guid orgId);
void ClearKeys();
CryptoKey AddOrgKey(Guid orgId, CipherString encOrgKey, byte[] privateKey);
string Decrypt(CipherString encyptedValue, CryptoKey key = null);
CipherString Encrypt(string plaintextValue, CryptoKey key = null);
CryptoKey MakeKeyFromPassword(string password, string salt);

109
src/App/Services/CryptoService.cs
View File

@ -7,6 +7,7 @@ using PCLCrypto;
using System.Linq;
using Bit.App.Enums;
using System.Collections.Generic;
using Newtonsoft.Json;
namespace Bit.App.Services
{
@ -15,7 +16,7 @@ namespace Bit.App.Services
private const string KeyKey = "key";
private const string PreviousKeyKey = "previousKey";
private const string PrivateKeyKey = "privateKey";
private const string OrgKeyKeyPrefix = "orgKey:";
private const string OrgKeysKey = "orgKeys";
private const int InitializationVectorSize = 16;
private readonly ISecureStorageService _secureStorage;
@ -23,7 +24,7 @@ namespace Bit.App.Services
private CryptoKey _key;
private CryptoKey _legacyEtmKey;
private CryptoKey _previousKey;
private IDictionary<Guid, CryptoKey> _orgKeys = new Dictionary<Guid, CryptoKey>();
private IDictionary<Guid, CryptoKey> _orgKeys;
private byte[] _privateKey;
public CryptoService(
@ -111,13 +112,65 @@ namespace Bit.App.Services
return _privateKey;
}
private set
set
{
if(value != null)
{
_secureStorage.Store(PrivateKeyKey, value);
_privateKey = value;
}
else
{
_secureStorage.Delete(PrivateKeyKey);
_privateKey = null;
}
}
}
public IDictionary<Guid, CryptoKey> OrgKeys
{
get
{
if(_orgKeys == null && _secureStorage.Contains(OrgKeysKey))
{
var orgKeysDictBytes = _secureStorage.Retrieve(OrgKeysKey);
if(orgKeysDictBytes != null)
{
var orgKeysDictJson = Encoding.UTF8.GetString(orgKeysDictBytes, 0, orgKeysDictBytes.Length);
if(!string.IsNullOrWhiteSpace(orgKeysDictJson))
{
_orgKeys = new Dictionary<Guid, CryptoKey>();
var orgKeysDict = JsonConvert.DeserializeObject<IDictionary<Guid, byte[]>>(orgKeysDictJson);
foreach(var item in orgKeysDict)
{
_orgKeys.Add(item.Key, new CryptoKey(item.Value));
}
}
}
}
return _orgKeys;
}
set
{
if(value != null && value.Any())
{
var dict = new Dictionary<Guid, byte[]>();
foreach(var item in value)
{
dict.Add(item.Key, item.Value.Key);
}
var dictJson = JsonConvert.SerializeObject(dict);
var dictBytes = Encoding.UTF8.GetBytes(dictJson);
_secureStorage.Store(OrgKeysKey, dictBytes);
_orgKeys = value;
}
else
{
_secureStorage.Delete(OrgKeysKey);
_orgKeys = null;
}
}
}
@ -129,30 +182,58 @@ namespace Bit.App.Services
public CryptoKey GetOrgKey(Guid orgId)
{
if(!_orgKeys.ContainsKey(orgId))
if(OrgKeys == null || !OrgKeys.ContainsKey(orgId))
{
var key = string.Concat(OrgKeyKeyPrefix, orgId);
if(!_secureStorage.Contains(key))
{
return null;
}
_orgKeys[orgId] = new CryptoKey(_secureStorage.Retrieve(key));
return null;
}
return _orgKeys[orgId];
return OrgKeys[orgId];
}
public void AddOrgKey(Guid orgId, CipherString encOrgKey, byte[] privateKey)
public void ClearOrgKey(Guid orgId)
{
var localOrgKeys = OrgKeys;
if(localOrgKeys == null || !localOrgKeys.ContainsKey(orgId))
{
return;
}
localOrgKeys.Remove(orgId);
// invoke setter
OrgKeys = localOrgKeys;
}
public void ClearKeys()
{
OrgKeys = null;
Key = null;
PrivateKey = null;
}
public CryptoKey AddOrgKey(Guid orgId, CipherString encOrgKey, byte[] privateKey)
{
try
{
var localOrgKeys = OrgKeys;
var decBytes = RsaDecryptToBytes(encOrgKey, privateKey);
_orgKeys[orgId] = new CryptoKey(decBytes);
var key = new CryptoKey(decBytes);
if(localOrgKeys.ContainsKey(orgId))
{
localOrgKeys[orgId] = key;
}
else
{
localOrgKeys.Add(orgId, key);
}
// invoke setter
OrgKeys = localOrgKeys;
return key;
}
catch
{
Debug.WriteLine("Cannot set org key. Decryption failed.");
return null;
}
}