builder.Services.AddCognitoIdentity();
builder.Services.AddAuthentication(options =>
{
options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
})
.AddJwtBearer(options =>
{
options.Authority = builder.Configuration["AWSCognito:Authority"];
options.Audience = builder.Configuration["AWSCognito:UserPoolClientId"];
options.TokenValidationParameters = new TokenValidationParameters
{
ValidateIssuerSigningKey = true,
ValidateAudience = true
};
options.TokenValidationParameters.AudienceValidator = (audiences, securityToken, validationParameters) =>
{
// Cognito tokens doesn't have "aud" claim. Instead the audience is set in "client_id"
var jsonWebToken = (Microsoft.IdentityModel.JsonWebTokens.JsonWebToken)securityToken;
if (!jsonWebToken.Claims.Any(f => f.Type == "aud"))
return false;
return validationParameters.ValidAudience.Contains(jsonWebToken.Claims.First(f => f.Type == "aud").Value);
};
});
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