34 lines
861 B
C#
34 lines
861 B
C#
using Org.BouncyCastle.Crypto;
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using Org.BouncyCastle.Crypto.Engines;
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using Org.BouncyCastle.Crypto.Macs;
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using Org.BouncyCastle.Crypto.Parameters;
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using System.Security.Cryptography;
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namespace WidevineClient.Crypto
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{
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public class CryptoUtils
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{
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public static byte[] GetHMACSHA256Digest(byte[] data, byte[] key)
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{
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return new HMACSHA256(key).ComputeHash(data);
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}
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public static byte[] GetCMACDigest(byte[] data, byte[] key)
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{
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IBlockCipher cipher = new AesEngine();
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IMac mac = new CMac(cipher, 128);
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KeyParameter keyParam = new KeyParameter(key);
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mac.Init(keyParam);
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mac.BlockUpdate(data, 0, data.Length);
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byte[] outBytes = new byte[16];
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mac.DoFinal(outBytes, 0);
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return outBytes;
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}
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}
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}
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