.NET 核心 JWE：否 "cty" header

Question

我正在使用以下代码发布我的 JWE：

var signCreds = new SigningCredentials(new SymmetricSecurityKey(Encoding.ASCII.GetBytes(Configuration["Jwt:SigningKey"])), SecurityAlgorithms.HmacSha256);
var encryptionCreds = new EncryptingCredentials(new SymmetricSecurityKey(Encoding.ASCII.GetBytes(Configuration["Jwt:Encryptionkey"])), SecurityAlgorithms.Aes128KW, SecurityAlgorithms.Aes128CbcHmacSha256);

var handler = new JwtSecurityTokenHandler();


var jwtSecurityToken = handler.CreateJwtSecurityToken(
  Configuration["Jwt:Issuer"],
  Configuration["Jwt:Audience"],
  new ClaimsIdentity(claims),
  DateTime.UtcNow,
  expiresIn,
  DateTime.UtcNow,
  signCreds,
  encryptionCreds);

但它没有指定令牌的 "cty" header - 仅指定 alg、enc 和 typ。如果我理解正确，必须为加密的 JWT 设置 header，所以我在解析 golang 中的令牌时遇到问题，因为 header 不存在。

我也试过下面的JWE发行方式：

var signCreds = new SigningCredentials(new SymmetricSecurityKey(Encoding.ASCII.GetBytes(Configuration["Jwt:SigningKey"])), SecurityAlgorithms.HmacSha256);
var encryptionCreds = new EncryptingCredentials(new SymmetricSecurityKey(Encoding.ASCII.GetBytes(Configuration["Jwt:Encryptionkey"])), SecurityAlgorithms.Aes128KW, SecurityAlgorithms.Aes128CbcHmacSha256);

var handler = new JwtSecurityTokenHandler();

var tokenDescriptor1 = new SecurityTokenDescriptor
  {
     Audience = "you",
     Issuer = "me",
     Subject = new ClaimsIdentity(claims),
     EncryptingCredentials = encryptionCreds
};

var tokenDescriptor2 = new SecurityTokenDescriptor
  {
     Audience = "you",
     Issuer = "me",
     Subject = new ClaimsIdentity(claims),
     EncryptingCredentials = encryptionCreds,
     SigningCredentials = signCreds
};

var tokenDescriptor3 = new SecurityTokenDescriptor
  {
     Audience = "you",
     Issuer = "me",
     Subject = new ClaimsIdentity(claims),
     EncryptingCredentials = encryptionCreds,
     SigningCredentials = signCreds,
     AdditionalHeaderClaims = new Dictionary<string, object> { { "cty", "JWT" } }
   };

var enc = handler.CreateEncodedJwt(tokenDescriptor1);
var encSigned = handler.CreateEncodedJwt(tokenDescriptor2);
var encSignedWithCty = handler.CreateEncodedJwt(tokenDescriptor3);

但结果相同：

我扫描了 library 但没有找到为令牌设置 Cty header 的代码。

也许有人知道我错过了什么或者有什么问题吗？

谢谢！

Answer 1

好像是个图书馆issue

.NET 核心 JWE：否 "cty" header

.NET Core JWE: no "cty" header

.net

c#

jwt

bearer-token

jwe