MAGETWO-64556: Configuration management - Hide sensitive values from config:show command

Author: Yevhen Miroshnychenko

app/code/Magento/Config/Console/Command/ConfigShow/ValueProcessor.php

@@ -92,7 +92,7 @@ public function process($scope, $scopeCode, $value, $path)
         $backendModel->setValue($value);
         $backendModel->afterLoad();
 
-        return ($backendModel instanceof Encrypted)
+        return ($backendModel instanceof Encrypted) && !empty($backendModel->getValue())
             ? self::SAFE_PLACEHOLDER
             : $backendModel->getValue();
     }

app/code/Magento/Config/Console/Command/ConfigShowCommand.php

@@ -144,7 +144,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         try {
             $this->scope = $input->getOption(self::INPUT_OPTION_SCOPE);
             $this->scopeCode = $input->getOption(self::INPUT_OPTION_SCOPE_CODE);
-            $this->inputPath = $input->getArgument(self::INPUT_ARGUMENT_PATH);
+            $this->inputPath = trim($input->getArgument(self::INPUT_ARGUMENT_PATH), "/");
 
             $this->scopeValidator->isValid($this->scope, $this->scopeCode);
             $configPath = $this->pathResolver->resolve($this->inputPath, $this->scope, $this->scopeCode);

app/code/Magento/Config/Test/Unit/Console/Command/ConfigShow/ValueProcessorTest.php

@@ -178,7 +178,7 @@ public function processDataProvider()
                 'hasBackendModel' => true,
                 'expectsGetBackendModel' => $this->once(),
                 'expectsCreate' => $this->never(),
-                'expectsGetValue' => $this->never(),
+                'expectsGetValue' => $this->once(),
                 'expectsValue' => ValueProcessor::SAFE_PLACEHOLDER,
                 'className' => Encrypted::class,
             ],