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Bitwarden-app-android-iphone-ios
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Code Issues 2 Releases Wiki Activity

compare crypto alg

This commit is contained in:
Kyle Spearrin 2019-03-28 16:04:38 -04:00
parent cb9dddc7a7
commit 556741683d
1 changed files with 30 additions and 0 deletions
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30
src/Core/Services/PclCryptoFunctionService.cs
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@ -60,6 +60,31 @@ namespace Bit.Core.Services
return Task.FromResult(hasher.GetValueAndReset());
}
public async Task<bool> CompareAsync(byte[] a, byte[] b)
{
var provider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithm.HmacSha256);
var hasher = provider.CreateHash(await RandomBytesAsync(32));
hasher.Append(a);
var mac1 = hasher.GetValueAndReset();
hasher.Append(b);
var mac2 = hasher.GetValueAndReset();
if(mac1.Length != mac2.Length)
{
return false;
}
for(int i = 0; i < mac2.Length; i++)
{
if(mac1[i] != mac2[i])
{
return false;
}
}
return true;
}
public Task<byte[]> AesEncryptAsync(byte[] data, byte[] iv, byte[] key)
{
var provider = SymmetricKeyAlgorithmProvider.OpenAlgorithm(SymmetricAlgorithm.AesCbcPkcs7);
@ -99,6 +124,11 @@ namespace Bit.Core.Services
public Task<Tuple<byte[], byte[]>> RsaGenerateKeyPairAsync(int length)
{
if(length != 1024 && length != 2048 && length != 4096)
{
throw new ArgumentException("Invalid key pair length.");
}
// Have to specify some algorithm
var provider = AsymmetricKeyAlgorithmProvider.OpenAlgorithm(AsymmetricAlgorithm.RsaOaepSha1);
var cryptoKey = provider.CreateKeyPair(length);