在一个使用RestAPI的ASP.NET Core 5项目中,我正在使用JWT Bearer以及tokens和refresh-tokens。我像这样配置了启动项:
生成令牌时,我使用了以下代码(需要注意的是,我使用了UTC日期):
然而,ValidateToken会出现以下异常:
var jwtSecretKey = Configuration.GetValue<string>("Jwt:Key");
var key = Encoding.UTF8.GetBytes(jwtSecretKey);
var tokenValidationParameters = new TokenValidationParameters
{
SaveSigninToken = true,
ValidateActor = true,
ValidateIssuer = true,
ValidateAudience = true,
ValidateLifetime = true,
ValidateIssuerSigningKey = true,
ValidIssuer = Configuration["Jwt:Issuer"],
ValidAudience = Configuration["Jwt:Audience"],
IssuerSigningKey = new SymmetricSecurityKey(key),
// set clockskew to zero so tokens expire exactly at token expiration time (instead of 5 minutes later)
ClockSkew = TimeSpan.Zero
};
services.AddAuthentication(options =>
{
options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(options =>
{
options.RequireHttpsMetadata = false;
options.SaveToken = true;
options.TokenValidationParameters = tokenValidationParameters;
});
生成令牌时,我使用了以下代码(需要注意的是,我使用了UTC日期):
string validIssuer = _configuration["Jwt:Issuer"];
string validAudience = _configuration["Jwt:Audience"];
var jwtSecretKey = _configuration.GetValue<string>("Jwt:Key");
var issuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtSecretKey));
var accessTimeout = _configuration.GetValue<int>("Jwt:MinutosExpiracionTokenAcceso");
DateTime fechaHoy = DateTime.UtcNow;
DateTime fechaExpiracionToken = DateTime.UtcNow.AddMinutes(accessTimeout);
var userRoles = await _userManager.GetRolesAsync(user);
var claims = new List<Claim>
{
new Claim(ClaimTypes.Sid, user.Id),
new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()) // (JWT ID) Unique Identifier for JWT, can be used to prevent the JWT from being replayed. Is best suited for refresh tokens
};
foreach (var userRole in userRoles)
{
claims.Add(new Claim(ClaimTypes.Role, userRole));
}
var token = new JwtSecurityToken(
validIssuer,
validAudience,
claims,
fechaHoy,
fechaExpiracionToken,
new SigningCredentials(issuerSigningKey, SecurityAlgorithms.HmacSha256)
);
var refreshTimeout = _configuration.GetValue<int>("Jwt:MinutosExpiracionTokenAutorizacion");
var refreshToken = new RefreshToken()
{
JwtId = token.Id,
IsUsed = false,
UserId = user.Id,
AddedDate = DateTime.UtcNow,
ExpiryDate = DateTime.UtcNow.AddMinutes(refreshTimeout),
IsRevoked = false,
Token = RandomString(25) + Guid.NewGuid()
};
await _unitOfWork.GetRepository<RefreshToken>().AddAsync(refreshToken);
await _unitOfWork.SaveChangesAsync();
var tokensDto = new TokensResponseDto
{
Token = new JwtSecurityTokenHandler().WriteToken(token),
RefreshToken = refreshToken.Token
};
return tokensDto;
我遇到了验证令牌的问题(_tokenValidationParameters与启动时使用的相同):
var jwtTokenHandler = new JwtSecurityTokenHandler();
ClaimsPrincipal principal = null;
SecurityToken validatedToken = null;
principal = jwtTokenHandler.ValidateToken(tokenRequest.Token, _tokenValidationParameters, out validatedToken);
无论我使用本地时间如DateTime.Now还是UTC,都会抛出没有特定日期的上述异常。
我试过在启动时像这样在TokenValidationParameters中添加LifetimeValidator:
LifetimeValidator = (DateTime? notBefore,
DateTime? expires,
SecurityToken securityToken,
TokenValidationParameters validationParameters
) =>
{
if (expires != null)
{
if (DateTime.UtcNow < expires.Value.ToUniversalTime())
{
return true; // Still valid
}
}
return false; // Expired
}
然而,ValidateToken会出现以下异常:
IDX10230: 生命周期验证失败。委托返回false,securitytoken: 'System.IdentityModel.Tokens.Jwt.JwtSecurityToken'。
感谢任何帮助。