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src/main/kotlin/util/AesCrypto.kt

@@ -0,0 +1,26 @@
+// src/main/kotlin/util/AesCrypto.kt
+package util
+
+import java.util.Base64
+import javax.crypto.Cipher
+import javax.crypto.spec.IvParameterSpec
+import javax.crypto.spec.SecretKeySpec
+
+object AesCrypto {
+    fun decrypt(cipherText: String, key: String, iv: String): String {
+        return try {
+            val keySpec = SecretKeySpec(key.toByteArray(Charsets.UTF_8), "AES")
+            val ivSpec = IvParameterSpec(iv.toByteArray(Charsets.UTF_8))
+
+            val cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
+            cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec)
+
+            val decodedBytes = Base64.getDecoder().decode(cipherText)
+            val decryptedBytes = cipher.doFinal(decodedBytes)
+
+            String(decryptedBytes, Charsets.UTF_8)
+        } catch (e: Exception) {
+            "복호화 실패: ${e.message}"
+        }
+    }
+}