我需要在PCL(为Xamarin Forms开发)中生成HMAC-SHA256哈希,它不支持.NET内置的HMAC /加密类,所以我正在使用BouncyCastle来实现我的加密类.
我需要生成HMAC-SHA256哈希,但我无法在Google上找到任何示例,BouncyCastle似乎也没有任何相关文档.谁能帮我吗?
解决方法
感谢
here的解决方案,我提出了这个代码:
public class HmacSha256 { public byte[] Hash(string text,string key) { var hmac = new HMac(new Sha256Digest()); hmac.Init(new KeyParameter(Encoding.UTF8.GetBytes(key))); byte[] result = new byte[hmac.GetMacSize()]; byte[] bytes = Encoding.UTF8.GetBytes(text); hmac.BlockUpdate(bytes,bytes.Length); hmac.DoFinal(result,0); return result; } }
相应的单元测试(使用FluentAssertions):
[TestClass] public class HmacSha256Tests { private readonly HmacSha256 _hmac = new HmacSha256(); [TestMethod] public void Hash_GeneratesValidHash_ForInput() { // Arrange string input = "hello"; string key = "test"; string expected = "F151EA24BDA91A18E89B8BB5793EF324B2A02133CCE15A28A719ACBD2E58A986"; // Act byte[] output = _hmac.Hash(input,key); string outputHex = BitConverter.ToString(output).Replace("-","").ToUpper(); // Assert expected.Should().Be(outputHex); } }