1 files changed, 263 insertions, 0 deletions
diff --git a/backend/node_modules/jsonwebtoken/verify.js b/backend/node_modules/jsonwebtoken/verify.js
new file mode 100644
index 0000000..cdbfdc4
--- /dev/null
+++ b/backend/node_modules/jsonwebtoken/verify.js
@@ -0,0 +1,263 @@
+const JsonWebTokenError = require('./lib/JsonWebTokenError');
+const NotBeforeError = require('./lib/NotBeforeError');
+const TokenExpiredError = require('./lib/TokenExpiredError');
+const decode = require('./decode');
+const timespan = require('./lib/timespan');
+const validateAsymmetricKey = require('./lib/validateAsymmetricKey');
+const PS_SUPPORTED = require('./lib/psSupported');
+const jws = require('jws');
+const {KeyObject, createSecretKey, createPublicKey} = require("crypto");
+
+const PUB_KEY_ALGS = ['RS256', 'RS384', 'RS512'];
+const EC_KEY_ALGS = ['ES256', 'ES384', 'ES512'];
+const RSA_KEY_ALGS = ['RS256', 'RS384', 'RS512'];
+const HS_ALGS = ['HS256', 'HS384', 'HS512'];
+
+if (PS_SUPPORTED) {
+  PUB_KEY_ALGS.splice(PUB_KEY_ALGS.length, 0, 'PS256', 'PS384', 'PS512');
+  RSA_KEY_ALGS.splice(RSA_KEY_ALGS.length, 0, 'PS256', 'PS384', 'PS512');
+}
+
+module.exports = function (jwtString, secretOrPublicKey, options, callback) {
+  if ((typeof options === 'function') && !callback) {
+    callback = options;
+    options = {};
+  }
+
+  if (!options) {
+    options = {};
+  }
+
+  //clone this object since we are going to mutate it.
+  options = Object.assign({}, options);
+
+  let done;
+
+  if (callback) {
+    done = callback;
+  } else {
+    done = function(err, data) {
+      if (err) throw err;
+      return data;
+    };
+  }
+
+  if (options.clockTimestamp && typeof options.clockTimestamp !== 'number') {
+    return done(new JsonWebTokenError('clockTimestamp must be a number'));
+  }
+
+  if (options.nonce !== undefined && (typeof options.nonce !== 'string' || options.nonce.trim() === '')) {
+    return done(new JsonWebTokenError('nonce must be a non-empty string'));
+  }
+
+  if (options.allowInvalidAsymmetricKeyTypes !== undefined && typeof options.allowInvalidAsymmetricKeyTypes !== 'boolean') {
+    return done(new JsonWebTokenError('allowInvalidAsymmetricKeyTypes must be a boolean'));
+  }
+
+  const clockTimestamp = options.clockTimestamp || Math.floor(Date.now() / 1000);
+
+  if (!jwtString){
+    return done(new JsonWebTokenError('jwt must be provided'));
+  }
+
+  if (typeof jwtString !== 'string') {
+    return done(new JsonWebTokenError('jwt must be a string'));
+  }
+
+  const parts = jwtString.split('.');
+
+  if (parts.length !== 3){
+    return done(new JsonWebTokenError('jwt malformed'));
+  }
+
+  let decodedToken;
+
+  try {
+    decodedToken = decode(jwtString, { complete: true });
+  } catch(err) {
+    return done(err);
+  }
+
+  if (!decodedToken) {
+    return done(new JsonWebTokenError('invalid token'));
+  }
+
+  const header = decodedToken.header;
+  let getSecret;
+
+  if(typeof secretOrPublicKey === 'function') {
+    if(!callback) {
+      return done(new JsonWebTokenError('verify must be called asynchronous if secret or public key is provided as a callback'));
+    }
+
+    getSecret = secretOrPublicKey;
+  }
+  else {
+    getSecret = function(header, secretCallback) {
+      return secretCallback(null, secretOrPublicKey);
+    };
+  }
+
+  return getSecret(header, function(err, secretOrPublicKey) {
+    if(err) {
+      return done(new JsonWebTokenError('error in secret or public key callback: ' + err.message));
+    }
+
+    const hasSignature = parts[2].trim() !== '';
+
+    if (!hasSignature && secretOrPublicKey){
+      return done(new JsonWebTokenError('jwt signature is required'));
+    }
+
+    if (hasSignature && !secretOrPublicKey) {
+      return done(new JsonWebTokenError('secret or public key must be provided'));
+    }
+
+    if (!hasSignature && !options.algorithms) {
+      return done(new JsonWebTokenError('please specify "none" in "algorithms" to verify unsigned tokens'));
+    }
+
+    if (secretOrPublicKey != null && !(secretOrPublicKey instanceof KeyObject)) {
+      try {
+        secretOrPublicKey = createPublicKey(secretOrPublicKey);
+      } catch (_) {
+        try {
+          secretOrPublicKey = createSecretKey(typeof secretOrPublicKey === 'string' ? Buffer.from(secretOrPublicKey) : secretOrPublicKey);
+        } catch (_) {
+          return done(new JsonWebTokenError('secretOrPublicKey is not valid key material'))
+        }
+      }
+    }
+
+    if (!options.algorithms) {
+      if (secretOrPublicKey.type === 'secret') {
+        options.algorithms = HS_ALGS;
+      } else if (['rsa', 'rsa-pss'].includes(secretOrPublicKey.asymmetricKeyType)) {
+        options.algorithms = RSA_KEY_ALGS
+      } else if (secretOrPublicKey.asymmetricKeyType === 'ec') {
+        options.algorithms = EC_KEY_ALGS
+      } else {
+        options.algorithms = PUB_KEY_ALGS
+      }
+    }
+
+    if (options.algorithms.indexOf(decodedToken.header.alg) === -1) {
+      return done(new JsonWebTokenError('invalid algorithm'));
+    }
+
+    if (header.alg.startsWith('HS') && secretOrPublicKey.type !== 'secret') {
+      return done(new JsonWebTokenError((`secretOrPublicKey must be a symmetric key when using ${header.alg}`)))
+    } else if (/^(?:RS|PS|ES)/.test(header.alg) && secretOrPublicKey.type !== 'public') {
+      return done(new JsonWebTokenError((`secretOrPublicKey must be an asymmetric key when using ${header.alg}`)))
+    }
+
+    if (!options.allowInvalidAsymmetricKeyTypes) {
+      try {
+        validateAsymmetricKey(header.alg, secretOrPublicKey);
+      } catch (e) {
+        return done(e);
+      }
+    }
+
+    let valid;
+
+    try {
+      valid = jws.verify(jwtString, decodedToken.header.alg, secretOrPublicKey);
+    } catch (e) {
+      return done(e);
+    }
+
+    if (!valid) {
+      return done(new JsonWebTokenError('invalid signature'));
+    }
+
+    const payload = decodedToken.payload;
+
+    if (typeof payload.nbf !== 'undefined' && !options.ignoreNotBefore) {
+      if (typeof payload.nbf !== 'number') {
+        return done(new JsonWebTokenError('invalid nbf value'));
+      }
+      if (payload.nbf > clockTimestamp + (options.clockTolerance || 0)) {
+        return done(new NotBeforeError('jwt not active', new Date(payload.nbf * 1000)));
+      }
+    }
+
+    if (typeof payload.exp !== 'undefined' && !options.ignoreExpiration) {
+      if (typeof payload.exp !== 'number') {
+        return done(new JsonWebTokenError('invalid exp value'));
+      }
+      if (clockTimestamp >= payload.exp + (options.clockTolerance || 0)) {
+        return done(new TokenExpiredError('jwt expired', new Date(payload.exp * 1000)));
+      }
+    }
+
+    if (options.audience) {
+      const audiences = Array.isArray(options.audience) ? options.audience : [options.audience];
+      const target = Array.isArray(payload.aud) ? payload.aud : [payload.aud];
+
+      const match = target.some(function (targetAudience) {
+        return audiences.some(function (audience) {
+          return audience instanceof RegExp ? audience.test(targetAudience) : audience === targetAudience;
+        });
+      });
+
+      if (!match) {
+        return done(new JsonWebTokenError('jwt audience invalid. expected: ' + audiences.join(' or ')));
+      }
+    }
+
+    if (options.issuer) {
+      const invalid_issuer =
+              (typeof options.issuer === 'string' && payload.iss !== options.issuer) ||
+              (Array.isArray(options.issuer) && options.issuer.indexOf(payload.iss) === -1);
+
+      if (invalid_issuer) {
+        return done(new JsonWebTokenError('jwt issuer invalid. expected: ' + options.issuer));
+      }
+    }
+
+    if (options.subject) {
+      if (payload.sub !== options.subject) {
+        return done(new JsonWebTokenError('jwt subject invalid. expected: ' + options.subject));
+      }
+    }
+
+    if (options.jwtid) {
+      if (payload.jti !== options.jwtid) {
+        return done(new JsonWebTokenError('jwt jwtid invalid. expected: ' + options.jwtid));
+      }
+    }
+
+    if (options.nonce) {
+      if (payload.nonce !== options.nonce) {
+        return done(new JsonWebTokenError('jwt nonce invalid. expected: ' + options.nonce));
+      }
+    }
+
+    if (options.maxAge) {
+      if (typeof payload.iat !== 'number') {
+        return done(new JsonWebTokenError('iat required when maxAge is specified'));
+      }
+
+      const maxAgeTimestamp = timespan(options.maxAge, payload.iat);
+      if (typeof maxAgeTimestamp === 'undefined') {
+        return done(new JsonWebTokenError('"maxAge" should be a number of seconds or string representing a timespan eg: "1d", "20h", 60'));
+      }
+      if (clockTimestamp >= maxAgeTimestamp + (options.clockTolerance || 0)) {
+        return done(new TokenExpiredError('maxAge exceeded', new Date(maxAgeTimestamp * 1000)));
+      }
+    }
+
+    if (options.complete === true) {
+      const signature = decodedToken.signature;
+
+      return done(null, {
+        header: header,
+        payload: payload,
+        signature: signature
+      });
+    }
+
+    return done(null, payload);
+  });
+};