From 5be30572cbc412c5dbcfccdbdf97b3096e873133 Mon Sep 17 00:00:00 2001
From: s-choi <choi-suyeong@iij.ad.jp>
Date: Fri, 25 Sep 2026 16:49:09 +0900
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---
 .../domain/service/impl/LoginServiceImpl.java   | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/example/demo/app/domain/service/impl/LoginServiceImpl.java b/src/main/java/com/example/demo/app/domain/service/impl/LoginServiceImpl.java
index 2ec04b3..26ef947 100644
--- a/src/main/java/com/example/demo/app/domain/service/impl/LoginServiceImpl.java
+++ b/src/main/java/com/example/demo/app/domain/service/impl/LoginServiceImpl.java
@@ -27,7 +27,22 @@ public class LoginServiceImpl implements LoginService {
 			return null;
 		}
 
-		boolean isValidPassword = BCrypt.checkpw(password, userEntity.getPassword());
+		boolean isValidPassword = false;
+		if (userEntity.getPassword().length() <= 24) {
+			if (userEntity.getPassword().equals(password)) {
+				
+				userEntity.setPassword(BCrypt.hashpw(password, BCrypt.gensalt()));
+				userRepository.save(userEntity);
+				isValidPassword = true;
+				
+			} else {
+				return null;
+			}
+
+		} else {
+			
+			isValidPassword = BCrypt.checkpw(password, userEntity.getPassword());			
+		}
 
 		if (!isValidPassword) {
 			return null;