Fix undefined const OPENSSL_KEYTYPE_EC

Author: jderusse

Generator/EcKey/EcKeyGenerator.php

@@ -30,6 +30,10 @@ class EcKeyGenerator implements PrivateKeyGeneratorInterface
      */
     public function generatePrivateKey(KeyOption $keyOption)
     {
+        if (\PHP_VERSION_ID < 70100) {
+            throw new \LogicException('The generation of ECDSA requires a version of PHP >= 7.1');
+        }
+
         Assert::isInstanceOf($keyOption, EcKeyOption::class);
 
         return $this->generatePrivateKeyFromOpensslOptions(

Generator/EcKey/EcKeyOption.php

@@ -21,6 +21,10 @@ class EcKeyOption implements KeyOption
 
     public function __construct($curveName = 'secp384r1')
     {
+        if (\PHP_VERSION_ID < 70100) {
+            throw new \LogicException('The generation of ECDSA requires a version of PHP >= 7.1');
+        }
+
         Assert::stringNotEmpty($curveName);
         Assert::oneOf($curveName, openssl_get_curve_names(), 'The given curve %s is not supported. Available curves are: %s');
 

composer.json

@@ -35,6 +35,7 @@
         "php": ">=5.5.0",
         "ext-hash": "*",
         "ext-openssl": "*",
+        "lib-openssl": ">=0.9.8",
         "webmozart/assert": "^1.0"
     },
     "require-dev": {