108 lines
3.5 KiB
C#
108 lines
3.5 KiB
C#
using System.IdentityModel.Tokens.Jwt;
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using System.Security.Claims;
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using System.Text;
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using Application.Services.Jwt;
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using Microsoft.Extensions.Configuration;
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using Microsoft.IdentityModel.Tokens;
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public class JwtService : IJwtService
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{
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private readonly string _audience;
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private readonly double _expiryMinutes;
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private readonly string _issuer;
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private readonly string _secretKey;
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public JwtService(IConfiguration configuration)
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{
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_secretKey = configuration["Jwt:SecretKey"];
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_issuer = configuration["Jwt:Issuer"];
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_audience = configuration["Jwt:Audience"];
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_expiryMinutes = double.Parse(configuration["Jwt:ExpirationTime"]);
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}
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public string GenerateJwtToken(string email)
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{
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var tokenHandler = new JwtSecurityTokenHandler();
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var key = Encoding.ASCII.GetBytes(_secretKey);
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var tokenDescriptor = new SecurityTokenDescriptor
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{
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Subject = new ClaimsIdentity(new[]
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{
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new Claim(ClaimTypes.Email, email)
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}),
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Expires = DateTime.UtcNow.AddMinutes(_expiryMinutes),
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Issuer = _issuer,
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Audience = _audience,
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SigningCredentials =
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new SigningCredentials(new SymmetricSecurityKey(key), SecurityAlgorithms.HmacSha256Signature)
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};
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var token = tokenHandler.CreateToken(tokenDescriptor);
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return tokenHandler.WriteToken(token);
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}
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public bool ValidateJwtToken(string token)
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{
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if (string.IsNullOrWhiteSpace(token))
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return false;
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var tokenHandler = new JwtSecurityTokenHandler();
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var key = Encoding.ASCII.GetBytes(_secretKey);
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try
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{
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tokenHandler.ValidateToken(token, new TokenValidationParameters
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{
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ValidateIssuerSigningKey = true,
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IssuerSigningKey = new SymmetricSecurityKey(key),
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ValidateIssuer = true,
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ValidateAudience = true,
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ValidIssuer = _issuer,
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ValidAudience = _audience,
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ClockSkew = TimeSpan.Zero
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}, out var validatedToken);
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return true;
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}
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catch
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{
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return false;
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}
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}
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public string RefreshToken(string token)
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{
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var principal = ValidateTokenAndGetPrincipal(token);
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if (principal == null) throw new SecurityTokenException("Invalid token.");
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var emailClaim = principal.Claims.FirstOrDefault(c => c.Type == ClaimTypes.Email);
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if (emailClaim == null) throw new SecurityTokenException("Token does not contain an email claim.");
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return GenerateJwtToken(emailClaim.Value);
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}
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private ClaimsPrincipal ValidateTokenAndGetPrincipal(string token)
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{
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var tokenHandler = new JwtSecurityTokenHandler();
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var key = Encoding.ASCII.GetBytes(_secretKey);
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try
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{
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var principal = tokenHandler.ValidateToken(token, new TokenValidationParameters
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{
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ValidateIssuerSigningKey = true,
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IssuerSigningKey = new SymmetricSecurityKey(key),
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ValidateIssuer = true,
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ValidateAudience = true,
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ValidIssuer = _issuer,
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ValidAudience = _audience,
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ClockSkew = TimeSpan.Zero
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}, out _);
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return principal;
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}
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catch
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{
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// Log or handle validation errors if necessary
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return null;
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}
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}
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} |