Fix case-sensitive tag names (#907) (#910)

* Don't lower tags until they are used for extensions so custom tags can be case-sensitive.

2 files changed, 5 insertions, 2 deletions

diff --git a/src/Compiler/Template.php b/src/Compiler/Template.php
index 03ee5110..e584236a 100644
--- a/src/Compiler/Template.php
+++ b/src/Compiler/Template.php
@@ -464,7 +464,7 @@ class Template extends BaseCompiler {
 	public function compileTag($tag, $args, $parameter = []) {
 		$this->prefixCodeStack[] = $this->prefix_code;
 		$this->prefix_code = [];
-		$result = $this->compileTag2(strtolower($tag), $args, $parameter);
+		$result = $this->compileTag2($tag, $args, $parameter);
 		$this->prefix_code = array_merge($this->prefix_code, array_pop($this->prefixCodeStack));
 		return $result;
 	}
@@ -591,6 +591,7 @@ class Template extends BaseCompiler {
 	 * @return ?\Smarty\Compile\CompilerInterface tag compiler object or null if not found or untrusted by security policy
 	 */
 	public function getTagCompiler($tag): ?\Smarty\Compile\CompilerInterface {
+        $tag = strtolower($tag);
 
 		if (isset($this->smarty->security_policy) && !$this->smarty->security_policy->isTrustedTag($tag, $this)) {
 			return null;
@@ -1114,7 +1115,7 @@ class Template extends BaseCompiler {
 			}
 		}
 
-		// call to function previousely defined by {function} tag
+		// call to function previously defined by {function} tag
 		if ($this->canCompileTemplateFunctionCall($tag)) {
 
 			if (!empty($parameter['modifierlist'])) {
diff --git a/src/Security.php b/src/Security.php
index 46cddcee..2f654d4e 100644
--- a/src/Security.php
+++ b/src/Security.php
@@ -261,6 +261,8 @@ class Security {
 	 * @return boolean                 true if tag is trusted
 	 */
 	public function isTrustedTag($tag_name, $compiler) {
+        $tag_name = strtolower($tag_name);
+
 		// check for internal always required tags
 		if (in_array($tag_name,	['assign', 'call'])) {
 			return true;