Add code for each Exception

src/BeforeValidException.php

@@ -4,4 +4,6 @@
 
 class BeforeValidException extends \UnexpectedValueException
 {
+    public const NBF_PRIOR_TO_DATE = 1;
+    public const IAT_PRIOR_TO_DATE = 2;
 }

src/CachedKeySet.php

@@ -99,7 +99,10 @@ public function __construct(
     public function offsetGet($keyId): Key
     {
         if (!$this->keyIdExists($keyId)) {
-            throw new OutOfBoundsException('Key ID not found');
+            throw new OutOfBoundsException(
+                'Key ID not found',
+                ExceptionCodes::KEY_ID_NOT_FOUND
+            );
         }
         return $this->keySet[$keyId];
     }
@@ -119,15 +122,21 @@ public function offsetExists($keyId): bool
      */
     public function offsetSet($offset, $value): void
     {
-        throw new LogicException('Method not implemented');
+        throw new LogicException(
+            'Method not implemented',
+            ExceptionCodes::OFFSET_SET_METHOD_NOT_IMPLEMENTED
+        );
     }
 
     /**
      * @param string $offset
      */
     public function offsetUnset($offset): void
     {
-        throw new LogicException('Method not implemented');
+        throw new LogicException(
+            'Method not implemented',
+            ExceptionCodes::OFFSET_UNSET_METHOD_NOT_IMPLEMENTED
+        );
     }
 
     private function keyIdExists(string $keyId): bool
@@ -198,7 +207,10 @@ private function getCacheItem(): CacheItemInterface
     private function setCacheKeys(): void
     {
         if (empty($this->jwksUri)) {
-            throw new RuntimeException('JWKS URI is empty');
+            throw new RuntimeException(
+                'JWKS URI is empty',
+                ExceptionCodes::JWKS_URI_IS_EMPTY
+            );
         }
 
         // ensure we do not have illegal characters

src/ExceptionCodes.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Firebase\JWT;
+
+class ExceptionCodes
+{
+    public const KEY_NOT_EMPTY = 1;
+    public const WRONG_NUMBER_OF_SEGMENTS = 2;
+    public const INVALID_HEADER_ENCODING = 3;
+    public const INVALID_CLAIMS_ENCODING = 4;
+    public const PAYLOAD_NOT_JSON = 5;
+    public const EMPTY_ALGORITHM = 6;
+    public const DECODE_ALGORITHM_NOT_SUPPORTED = 7;
+    public const INCORRECT_KEY_FOR_ALGORITHM = 8;
+    public const SIGN_ALGORITHM_NOT_SUPPORTED = 9;
+    public const KEY_IS_NOT_STRING = 10;
+    public const OPENSSL_CAN_NOT_SIGN_DATA = 11;
+    public const SODIUM_KEY_IS_NOT_STRING = 12;
+    public const SODIUM_EXCEPTION = 13;
+    public const SIGN_GENERAL_EXCEPTION = 14;
+    public const VERIFY_ALGORITHM_NOT_SUPPORTED = 15;
+    public const VERIFY_OPEN_SSL_ERROR = 16;
+    public const VERIFY_SODIUM_NOT_AVAILABLE = 17;
+    public const VERIFY_KEY_MATERIAL_IS_NOT_STRING = 18;
+    public const VERIFY_SODIUM_EXCEPTION = 19;
+    public const VERIFY_KEY_IS_NOT_STRING = 20;
+    public const DECODED_JSON_IS_NULL = 21;
+    public const ENCODED_JSON_IS_NULL = 22;
+    public const INVALID_JSON = 23;
+    public const KID_IS_EMPTY = 24;
+    public const KID_IS_INVALID = 25;
+    public const JSON_ERROR = 26;
+
+    public const KEY_ID_NOT_FOUND = 27;
+    public const OFFSET_SET_METHOD_NOT_IMPLEMENTED = 28;
+    public const OFFSET_UNSET_METHOD_NOT_IMPLEMENTED = 29;
+
+    public const JWKS_URI_IS_EMPTY = 30;
+
+    public const JWK_MISSING_KEYS = 31;
+    public const JWT_KEYS_IS_EMPTY = 32;
+    public const JWT_ALGORITHM_NOT_SUPPORTED = 33;
+    public const JWK_IS_EMPTY = 34;
+    public const JWT_MISSING_KTY_PARAMETER = 35;
+    public const JWT_MISSING_ALG_PARAMETER = 36;
+    public const JWT_RSA_KEYS_NOT_SUPPORTED = 37;
+    public const JWT_RSA_KEYS_MISSING_N_AND_E = 38;
+    public const JWT_OPEN_SSL_ERROR = 39;
+    public const JWK_EC_D_IS_NOT_SET = 40;
+    public const JWT_EC_CRV_IS_EMPTY = 41;
+    public const JWK_UNSUPPORTED_EC_CURVE = 42;
+    public const JWT_X_AND_Y_ARE_EMPTY = 43;
+
+    public const KEY_MATERIAL_IS_INVALID = 44;
+    public const KEY_MATERIAL_IS_EMPTY = 45;
+    public const KEY_ALGORITHM_IS_EMPTY = 46;
+}

src/ExpiredException.php

@@ -4,4 +4,5 @@
 
 class ExpiredException extends \UnexpectedValueException
 {
+    public const TOKEN_EXPIRED = 1;
 }

src/JWK.php

@@ -50,11 +50,17 @@ public static function parseKeySet(array $jwks, string $defaultAlg = null): arra
         $keys = [];
 
         if (!isset($jwks['keys'])) {
-            throw new UnexpectedValueException('"keys" member must exist in the JWK Set');
+            throw new UnexpectedValueException(
+                '"keys" member must exist in the JWK Set',
+                ExceptionCodes::JWK_MISSING_KEYS
+            );
         }
 
         if (empty($jwks['keys'])) {
-            throw new InvalidArgumentException('JWK Set did not contain any keys');
+            throw new InvalidArgumentException(
+                'JWK Set did not contain any keys',
+                ExceptionCodes::JWT_KEYS_IS_EMPTY
+            );
         }
 
         foreach ($jwks['keys'] as $k => $v) {
@@ -65,7 +71,11 @@ public static function parseKeySet(array $jwks, string $defaultAlg = null): arra
         }
 
         if (0 === \count($keys)) {
-            throw new UnexpectedValueException('No supported algorithms found in JWK Set');
+            throw new UnexpectedValueException(
+                'No supported algorithms found in JWK Set',
+                ExceptionCodes::JWT_ALGORITHM_NOT_SUPPORTED
+
+            );
         }
 
         return $keys;
@@ -89,11 +99,17 @@ public static function parseKeySet(array $jwks, string $defaultAlg = null): arra
     public static function parseKey(array $jwk, string $defaultAlg = null): ?Key
     {
         if (empty($jwk)) {
-            throw new InvalidArgumentException('JWK must not be empty');
+            throw new InvalidArgumentException(
+                'JWK must not be empty',
+                ExceptionCodes::JWK_IS_EMPTY
+            );
         }
 
         if (!isset($jwk['kty'])) {
-            throw new UnexpectedValueException('JWK must contain a "kty" parameter');
+            throw new UnexpectedValueException(
+                'JWK must contain a "kty" parameter',
+                ExceptionCodes::JWT_MISSING_KTY_PARAMETER
+            );
         }
 
         if (!isset($jwk['alg'])) {
@@ -102,44 +118,66 @@ public static function parseKey(array $jwk, string $defaultAlg = null): ?Key
                 // for parsing in this library. Use the $defaultAlg parameter when parsing the
                 // key set in order to prevent this error.
                 // @see https://datatracker.ietf.org/doc/html/rfc7517#section-4.4
-                throw new UnexpectedValueException('JWK must contain an "alg" parameter');
+                throw new UnexpectedValueException(
+                    'JWK must contain an "alg" parameter',
+                    ExceptionCodes::JWT_MISSING_ALG_PARAMETER
+                );
             }
             $jwk['alg'] = $defaultAlg;
         }
 
         switch ($jwk['kty']) {
             case 'RSA':
                 if (!empty($jwk['d'])) {
-                    throw new UnexpectedValueException('RSA private keys are not supported');
+                    throw new UnexpectedValueException(
+                        'RSA private keys are not supported',
+                        ExceptionCodes::JWT_RSA_KEYS_NOT_SUPPORTED
+                    );
                 }
                 if (!isset($jwk['n']) || !isset($jwk['e'])) {
-                    throw new UnexpectedValueException('RSA keys must contain values for both "n" and "e"');
+                    throw new UnexpectedValueException(
+                        'RSA keys must contain values for both "n" and "e"',
+                        ExceptionCodes::JWT_RSA_KEYS_MISSING_N_AND_E
+                    );
                 }
 
                 $pem = self::createPemFromModulusAndExponent($jwk['n'], $jwk['e']);
                 $publicKey = \openssl_pkey_get_public($pem);
                 if (false === $publicKey) {
                     throw new DomainException(
-                        'OpenSSL error: ' . \openssl_error_string()
+                        'OpenSSL error: ' . \openssl_error_string(),
+                        ExceptionCodes::JWT_OPEN_SSL_ERROR
                     );
                 }
                 return new Key($publicKey, $jwk['alg']);
             case 'EC':
                 if (isset($jwk['d'])) {
                     // The key is actually a private key
-                    throw new UnexpectedValueException('Key data must be for a public key');
+                    throw new UnexpectedValueException(
+                        'Key data must be for a public key',
+                        ExceptionCodes::JWK_EC_D_IS_NOT_SET
+                    );
                 }
 
                 if (empty($jwk['crv'])) {
-                    throw new UnexpectedValueException('crv not set');
+                    throw new UnexpectedValueException(
+                        'crv not set',
+                        ExceptionCodes::JWT_EC_CRV_IS_EMPTY
+                    );
                 }
 
                 if (!isset(self::EC_CURVES[$jwk['crv']])) {
-                    throw new DomainException('Unrecognised or unsupported EC curve');
+                    throw new DomainException(
+                        'Unrecognised or unsupported EC curve',
+                        ExceptionCodes::JWK_UNSUPPORTED_EC_CURVE
+                    );
                 }
 
                 if (empty($jwk['x']) || empty($jwk['y'])) {
-                    throw new UnexpectedValueException('x and y not set');
+                    throw new UnexpectedValueException(
+                        'x and y not set',
+                        ExceptionCodes::JWT_X_AND_Y_ARE_EMPTY
+                    );
                 }
 
                 $publicKey = self::createPemFromCrvAndXYCoordinates($jwk['crv'], $jwk['x'], $jwk['y']);