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download, decrypt and open attachment files

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This commit is contained in:
Kyle Spearrin
2017-07-12 23:09:44 -04:00
parent 0a7ad44d23
commit ac3fdbc2cd
26 changed files with 285 additions and 71 deletions
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51
src/App/Services/CryptoService.cs
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@@ -297,18 +297,61 @@ namespace Bit.App.Services
// Old encrypt-then-mac scheme, swap out the key
if(_legacyEtmKey == null)
{
_legacyEtmKey = new SymmetricCryptoKey(key.Key, Enums.EncryptionType.AesCbc128_HmacSha256_B64);
_legacyEtmKey = new SymmetricCryptoKey(key.Key, EncryptionType.AesCbc128_HmacSha256_B64);
}
key = _legacyEtmKey;
}
if(encyptedValue.EncryptionType != key.EncryptionType)
return Crypto.AesCbcDecrypt(encyptedValue, key);
}
public byte[] DecryptToBytes(byte[] encyptedValue, SymmetricCryptoKey key = null)
{
if(key == null)
{
throw new ArgumentException("encType unavailable.");
key = EncKey ?? Key;
}
return Crypto.AesCbcDecrypt(encyptedValue, key);
if(key == null)
{
throw new ArgumentNullException(nameof(key));
}
if(encyptedValue == null || encyptedValue.Length == 0)
{
throw new ArgumentNullException(nameof(encyptedValue));
}
byte[] ct, iv, mac = null;
var encType = (EncryptionType)encyptedValue[0];
switch(encType)
{
case EncryptionType.AesCbc128_HmacSha256_B64:
case EncryptionType.AesCbc256_HmacSha256_B64:
if(encyptedValue.Length <= 49)
{
throw new InvalidOperationException("Invalid value length.");
}
iv = new ArraySegment<byte>(encyptedValue, 1, 16).ToArray();
mac = new ArraySegment<byte>(encyptedValue, 17, 32).ToArray();
ct = new ArraySegment<byte>(encyptedValue, 49, encyptedValue.Length - 49).ToArray();
break;
case EncryptionType.AesCbc256_B64:
if(encyptedValue.Length <= 17)
{
throw new InvalidOperationException("Invalid value length.");
}
iv = new ArraySegment<byte>(encyptedValue, 1, 16).ToArray();
ct = new ArraySegment<byte>(encyptedValue, 17, encyptedValue.Length - 17).ToArray();
break;
default:
throw new InvalidOperationException("Invalid encryption type.");
}
return Crypto.AesCbcDecrypt(encType, ct, iv, mac, key);
}
public byte[] RsaDecryptToBytes(CipherString encyptedValue, byte[] privateKey)