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This commit is contained in:
Kyle Spearrin
2017-07-22 15:38:08 -04:00
parent b32603b472
commit f9d336a3a6
24 changed files with 786 additions and 80 deletions
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33
src/App/Utilities/Crypto.cs
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@@ -10,6 +10,26 @@ namespace Bit.App.Utilities
public static class Crypto
{
public static CipherString AesCbcEncrypt(byte[] plainBytes, SymmetricCryptoKey key)
{
var parts = AesCbcEncryptToParts(plainBytes, key);
return new CipherString(parts.Item1, Convert.ToBase64String(parts.Item2),
Convert.ToBase64String(parts.Item4), Convert.ToBase64String(parts.Item3));
}
public static byte[] AesCbcEncryptToBytes(byte[] plainBytes, SymmetricCryptoKey key)
{
var parts = AesCbcEncryptToParts(plainBytes, key);
var encBytes = new byte[1 + parts.Item2.Length + parts.Item3.Length + parts.Item4.Length];
encBytes[0] = (byte)parts.Item1;
parts.Item2.CopyTo(encBytes, 1);
parts.Item3.CopyTo(encBytes, 1 + parts.Item2.Length);
parts.Item4.CopyTo(encBytes, 1 + parts.Item2.Length + parts.Item3.Length);
return encBytes;
}
private static Tuple<EncryptionType, byte[], byte[], byte[]> AesCbcEncryptToParts(byte[] plainBytes,
SymmetricCryptoKey key)
{
if(key == null)
{
@@ -24,11 +44,10 @@ namespace Bit.App.Utilities
var provider = WinRTCrypto.SymmetricKeyAlgorithmProvider.OpenAlgorithm(SymmetricAlgorithm.AesCbcPkcs7);
var cryptoKey = provider.CreateSymmetricKey(key.EncKey);
var iv = RandomBytes(provider.BlockLength);
var encryptedBytes = WinRTCrypto.CryptographicEngine.Encrypt(cryptoKey, plainBytes, iv);
var mac = key.MacKey != null ? ComputeMacBase64(encryptedBytes, iv, key.MacKey) : null;
var ct = WinRTCrypto.CryptographicEngine.Encrypt(cryptoKey, plainBytes, iv);
var mac = key.MacKey != null ? ComputeMac(ct, iv, key.MacKey) : null;
return new CipherString(key.EncryptionType, Convert.ToBase64String(iv),
Convert.ToBase64String(encryptedBytes), mac);
return new Tuple<EncryptionType, byte[], byte[], byte[]>(key.EncryptionType, iv, mac, ct);
}
public static byte[] AesCbcDecrypt(CipherString encyptedValue, SymmetricCryptoKey key)
@@ -84,12 +103,6 @@ namespace Bit.App.Utilities
return WinRTCrypto.CryptographicBuffer.GenerateRandom(length);
}
public static string ComputeMacBase64(byte[] ctBytes, byte[] ivBytes, byte[] macKey)
{
var mac = ComputeMac(ctBytes, ivBytes, macKey);
return Convert.ToBase64String(mac);
}
public static byte[] ComputeMac(byte[] ctBytes, byte[] ivBytes, byte[] macKey)
{
if(ctBytes == null)