암복호화 function 개발
- 암호화모듈서비스(CryptoModuleService)를 호출하여 암복호화 수행하는 function
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package com.eactive.eai.custom.transformer.function;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import static org.mockito.ArgumentMatchers.any;
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import static org.mockito.ArgumentMatchers.anyMap;
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import static org.mockito.ArgumentMatchers.eq;
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import static org.mockito.ArgumentMatchers.isNull;
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import static org.mockito.Mockito.mock;
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import static org.mockito.Mockito.reset;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.when;
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import java.lang.reflect.Field;
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import java.nio.charset.StandardCharsets;
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import java.util.Base64;
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import java.util.Stack;
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import org.junit.jupiter.api.AfterAll;
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import org.junit.jupiter.api.BeforeAll;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.DisplayName;
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import org.junit.jupiter.api.MethodOrderer;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.TestMethodOrder;
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import org.nfunk.jep.ParseException;
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import org.nfunk.jep.function.PostfixMathCommand;
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import org.springframework.beans.factory.support.BeanDefinitionBuilder;
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import org.springframework.context.support.GenericApplicationContext;
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import com.eactive.eai.common.security.CryptoModuleService;
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import com.eactive.eai.common.util.ApplicationContextProvider;
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@TestMethodOrder(MethodOrderer.DisplayName.class)
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class DJBErpCryptoFunctionTest {
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private static final String MODULE_NAME = "TEST_MODULE";
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private static final String PLAIN_TEXT = "plaintext-value";
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private static final byte[] PLAIN_BYTES = PLAIN_TEXT.getBytes(StandardCharsets.UTF_8);
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private static final byte[] CIPHER_BYTES = new byte[]{0x10, 0x20, 0x30, 0x40};
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private static final String ENC_BASE64 = Base64.getEncoder().encodeToString(CIPHER_BYTES);
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private static GenericApplicationContext ctx;
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private static CryptoModuleService mockService;
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private DJBErpDecryt decryt;
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private DJBErpEncryt encryt;
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// =========================================================================
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// 클래스 초기화
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// =========================================================================
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@BeforeAll
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static void setUpClass() throws Exception {
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mockService = mock(CryptoModuleService.class);
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ctx = new GenericApplicationContext();
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ctx.getBeanFactory().registerSingleton("cryptoModuleService", mockService);
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ctx.registerBeanDefinition("applicationContextProvider",
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BeanDefinitionBuilder.genericBeanDefinition(ApplicationContextProvider.class)
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.getBeanDefinition());
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ctx.refresh();
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}
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@AfterAll
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static void tearDownClass() {
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if (ctx != null) ctx.close();
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}
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@BeforeEach
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void setUp() throws Exception {
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reset(mockService);
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when(mockService.decrypt(any(), anyMap(), isNull(), any(byte[].class))).thenReturn(PLAIN_BYTES);
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when(mockService.encrypt(any(), anyMap(), isNull(), any(byte[].class))).thenReturn(CIPHER_BYTES);
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decryt = new DJBErpDecryt();
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encryt = new DJBErpEncryt();
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}
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// =========================================================================
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// 1. DJBErpDecryt
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// =========================================================================
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@Test
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@DisplayName("1-1. 정상 복호화: (encBase64, moduleName) → 평문이 스택에 push된다")
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void decryt_normalCase_pushesPlainText() throws Exception {
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Stack<Object> stack = buildStack(ENC_BASE64, MODULE_NAME);
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setParamCount(decryt, 2);
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decryt.run(stack);
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assertEquals(PLAIN_TEXT, stack.pop());
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assertTrue(stack.isEmpty(), "결과 push 후 스택에 잔여 항목이 없어야 한다");
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verify(mockService).decrypt(eq(MODULE_NAME), anyMap(), isNull(), any(byte[].class));
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}
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@Test
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@DisplayName("1-2. 파라미터 수가 2가 아니면 ParseException")
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void decryt_wrongParamCount_throwsParseException() throws Exception {
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Stack<Object> stack = buildStack(ENC_BASE64, MODULE_NAME);
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setParamCount(decryt, 3);
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assertThrows(ParseException.class, () -> decryt.run(stack));
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}
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@Test
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@DisplayName("1-3. 유효하지 않은 Base64 입력 → ParseException")
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void decryt_invalidBase64_throwsParseException() throws Exception {
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Stack<Object> stack = buildStack("not-valid-base64!!!", MODULE_NAME);
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setParamCount(decryt, 2);
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assertThrows(ParseException.class, () -> decryt.run(stack));
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}
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@Test
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@DisplayName("1-4. 암호화 서비스 예외 → 'DJBErpDecryt 복호화 실패' ParseException으로 래핑")
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void decryt_serviceThrows_wrapsInParseException() throws Exception {
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when(mockService.decrypt(any(), anyMap(), isNull(), any(byte[].class)))
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.thenThrow(new RuntimeException("모듈 오류"));
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Stack<Object> stack = buildStack(ENC_BASE64, MODULE_NAME);
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setParamCount(decryt, 2);
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ParseException ex = assertThrows(ParseException.class, () -> decryt.run(stack));
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assertTrue(ex.getMessage().contains("DJBErpDecryt 복호화 실패"));
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}
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@Test
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@DisplayName("1-5. moduleName이 CryptoModuleService에 그대로 전달된다")
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void decryt_moduleNamePassedToService() throws Exception {
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String customModule = "CUSTOM_AES_MODULE";
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Stack<Object> stack = buildStack(ENC_BASE64, customModule);
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setParamCount(decryt, 2);
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decryt.run(stack);
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verify(mockService).decrypt(eq(customModule), anyMap(), isNull(), any(byte[].class));
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}
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// =========================================================================
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// 2. DJBErpEncryt
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// =========================================================================
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@Test
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@DisplayName("2-1. 정상 암호화: (plainText, moduleName) → Base64가 스택에 push된다")
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void encryt_normalCase_pushesBase64() throws Exception {
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Stack<Object> stack = buildStack(PLAIN_TEXT, MODULE_NAME);
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setParamCount(encryt, 2);
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encryt.run(stack);
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assertEquals(ENC_BASE64, stack.pop());
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assertTrue(stack.isEmpty(), "결과 push 후 스택에 잔여 항목이 없어야 한다");
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verify(mockService).encrypt(eq(MODULE_NAME), anyMap(), isNull(), any(byte[].class));
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}
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@Test
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@DisplayName("2-2. 파라미터 수가 2가 아니면 ParseException")
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void encryt_wrongParamCount_throwsParseException() throws Exception {
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Stack<Object> stack = buildStack(PLAIN_TEXT, MODULE_NAME);
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setParamCount(encryt, 3);
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assertThrows(ParseException.class, () -> encryt.run(stack));
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}
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@Test
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@DisplayName("2-3. 암호화 서비스 예외 → 'DJBErpEncryt 암호화 실패' ParseException으로 래핑")
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void encryt_serviceThrows_wrapsInParseException() throws Exception {
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when(mockService.encrypt(any(), anyMap(), isNull(), any(byte[].class)))
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.thenThrow(new RuntimeException("모듈 오류"));
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Stack<Object> stack = buildStack(PLAIN_TEXT, MODULE_NAME);
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setParamCount(encryt, 2);
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ParseException ex = assertThrows(ParseException.class, () -> encryt.run(stack));
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assertTrue(ex.getMessage().contains("DJBErpEncryt 암호화 실패"));
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}
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@Test
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@DisplayName("2-4. moduleName이 CryptoModuleService에 그대로 전달된다")
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void encryt_moduleNamePassedToService() throws Exception {
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String customModule = "CUSTOM_AES_MODULE";
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Stack<Object> stack = buildStack(PLAIN_TEXT, customModule);
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setParamCount(encryt, 2);
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encryt.run(stack);
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verify(mockService).encrypt(eq(customModule), anyMap(), isNull(), any(byte[].class));
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}
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@Test
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@DisplayName("2-5. plainText가 UTF-8 바이트로 변환되어 서비스에 전달된다")
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void encryt_plainTextEncodedAsUtf8() throws Exception {
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String korean = "한글평문";
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Stack<Object> stack = buildStack(korean, MODULE_NAME);
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setParamCount(encryt, 2);
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encryt.run(stack);
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verify(mockService).encrypt(eq(MODULE_NAME), anyMap(), isNull(),
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eq(korean.getBytes(StandardCharsets.UTF_8)));
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}
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// =========================================================================
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// 헬퍼
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// =========================================================================
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@SuppressWarnings({"rawtypes", "unchecked"})
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private Stack<Object> buildStack(Object... params) {
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Stack stack = new Stack();
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for (Object p : params) {
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stack.push(p);
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}
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return stack;
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}
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private void setParamCount(PostfixMathCommand cmd, int count) throws Exception {
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Field field = PostfixMathCommand.class.getDeclaredField("curNumberOfParameters");
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field.setAccessible(true);
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field.set(cmd, count);
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}
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}
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