/// <summary>
/// 生成签名,返回TOKEN
/// </summary>
private byte[] sign(XJwtType xJwtType, byte[] payload, long expiry)
{
var ms = new MemoryStream();
/*计算header*/
var headerStream = new MemoryStream();
//java中默认转换大端
var expiryByte = expiry.ToByteArray().Order(ByteOrder.BIG_ENDIAN);
headerStream.Write(expiryByte, 0, expiryByte.Length);
var typeByte = (byte)xJwtType;
headerStream.WriteByte(typeByte);
//java中默认转换大端
var issueIdByte = issueId.ToByteArray().Order(ByteOrder.BIG_ENDIAN);
headerStream.Write(issueIdByte, 0, issueIdByte.Length);
//对应java=》Base64.getEncoder().encode(header)代码,java base64编码
var headerBase64 = headerStream.ToArray().EncoderJavaBase64();
ms.Write(headerBase64, 0, headerBase64.Length);
var dotbyte = (byte)DOT;
ms.WriteByte(dotbyte);
var payloadBase64 = payload.EncoderJavaBase64();
ms.Write(payloadBase64, 0, payloadBase64.Length);
//签名结果
var signResult = _hmac_sha256.ComputeHash(ms.ToArray());
//继续组装完整的JWTToken
ms.WriteByte(dotbyte);
var signResultBase64 = signResult.EncoderJavaBase64();
ms.Write(signResultBase64, 0, signResultBase64.Length);
return(ms.ToArray());
}
/// <summary>
/// XJwt 加密，签名
/// </summary>
/// <param name="type"></param>
/// <param name="json"></param>
/// <param name="expiry"></param>
/// <returns></returns>
public string encryptAndSign(XJwtType type, string payload, long expiry)
{
//return null;
MemoryStream byteStream = new MemoryStream();
/*payload部分*/
byte[] longPart = _r.NextLong().ToByteArray().Order(ByteOrder.BIG_ENDIAN);
//var byteStream = new MemoryStream();
byteStream.Write(longPart, 0, longPart.Length);
//写入payload数据
var payloadByte = Encoding.UTF8.GetBytes(payload);
byteStream.Write(payloadByte, 0, payloadByte.Length);
//计算padding填充，这里计算要填充多少个
byte padding = (byte)((16 - ((byteStream.Position + 1) & 0xF)) & 0xF);
/*
* 将填充多少个的实际值以字节填充进字节数组中直到填充足够
* 如：需要16位 - 当前内容位 如11 +1 表示需要填充4位
* 将4作为字节值填充
*/
for (int i = 0; i < padding + 1; ++i)
{
byteStream.WriteByte(padding);
}
var inputByte = byteStream.ToArray();
/*装配好内容流之后，使用AES加密*/
var enBytes = _enCrypto.TransformFinalBlock(inputByte, 0, inputByte.Length);
//payload字节数组有了
/*3、计算sign*/
var outByte = sign(type, enBytes, expiry);
/*4、拼接结果返回*/
return(Encoding.UTF8.GetString(outByte));
}
