P4ADEV-1341 add CertUtilsTest

src/test/java/it/gov/pagopa/payhub/pdnd/utils/CertUtilsTest.java

@@ -0,0 +1,95 @@
+package it.gov.pagopa.payhub.pdnd.utils;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.io.IOException;
+import java.security.NoSuchAlgorithmException;
+import java.security.PrivateKey;
+import java.security.spec.InvalidKeySpecException;
+import org.junit.jupiter.api.Test;
+
+class CertUtilsTest {
+
+  @Test
+  void whenPemKey2PrivateKeyThenValidKey() throws InvalidKeySpecException, NoSuchAlgorithmException, IOException {
+    // Given
+    String pemKey = """
+                -----BEGIN PRIVATE KEY-----
+                MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQCT5fdA/ZKoyLas
+                R5/kxfFm8KBz4v3i8k76Xd8j2vh8kBaapzn9hAHWJXOJ+GOUFOxkw1bnI2PUtZjj
+                tw49XrjcxQ37sOV407+B3ko49zZjNB97OPFQyZx9V3uNcBjKnM3UqNbcBwdIIlVW
+                Egt0Cao7gEGE1CKsaXpuZkofVgGo5f8K8IdETLJPFuspDTR4UPofDraL2HCxbsVx
+                dE0UBFXgB9vQmBMkPk27cz+Ze6j5wgSGME/A+YCCp1uvJqWK/uRfGxMRyVYInR5H
+                bDiI06iZwiLLW1Pf6gE3CCYSUw42VnPHODaitjJ6XLkolB5xsUprkttIg+UrRGSa
+                9J3xg3gNAgMBAAECggEASKjRCS/KjntVK1xg1F7e0yjiWyyoeId8f4oApzfbni6X
+                vFDtr3vb/x4VHjJWkZiZ7oL9Pb7oO8cfnrf/Ge1gOq3gycdFZU/6JM5VfpkNMj2Y
+                Pcxi2cLCy91fyMPKmjfg81ojfKNDU4/yhr+EuvRImsTO63fgtP149aXxQmXZmOTu
+                TFjSNTRfvtMgHN0Em1PUgQxO8oUh3Djf5spjAJ/w+gVBSYsYSv5sOOi2H/qZSALZ
+                hc1t4GfzNKZuyG8FxNwH1SIVkKTYQnDhyiE9426tq6Kiuqvh2MspVJcRGpbaxgr2
+                q++ZZrAl60ma5U2hUEgG5oLGjyrgQjEyroZhEokgLQKBgQDKIeAJ/FYdEX4cvHhS
+                kuUpHQjpZtwOwC+vr4ojudpjLDOTTdkFXzd7jeCmjp4r1/arRxx1KZWP0fxlUEov
+                0LDiaU0zBeol/q0ayq5XnhJNVngCyKjQQ+Np1eIGTIIGOkAm8LlnEsvlQLbuOYZ4
+                eeeplBW3h321MFKgch7IyqBb5wKBgQC7UBG/ypw6RWPUOHYdtY1nLCQQJjvKCOMT
+                DolkFB2UUuNfNGK6PDUL9KbPIsrHJLw0oGoqQyBkInVMG5jJb/bHdH0spiKGn51u
+                orMk/xsA990Kqt+DT1Z5fEpoPchGMc529JR5h43n1n5s8/6jyDa5JNLFnS9xKZTm
+                IvV/Nayt6wKBgGxpSs5QRqeEkE09UJOJMduhNPxqLLDEp07lKYQL1HPIa0kgQbu9
+                2/YqnEj4ySDezfADTeIREaR3jZWRQJjwp05oB/3LuE/0jkeGWYeowkw0il2D3fcF
+                0l0bWATk2AAbEflQtz/vNuiYkwSmWdcYGwY65ILw6p1Zc5eWXah39RYVAoGAI93Y
+                GDZupcXFsMxC6btq4ReVrDX1+uCqwmplKnGjnFQmz4MTaH/A1JI7IqyR0YIaO6V/
+                zqnd2O60MSeToPa8dUK7+UGymL6VgarLzMjAXfYYMEO52sXlVAvVn5I8+BvvYd3B
+                VGf9ZyguOySZXLkoqVkAtvA7Nlr09QA6q+oWL5MCgYAsLS2PEMY/HMR1Z5P/uMxw
+                q7eQ7K3YYKcJpbM2da7r38UaZc/HhtiaU/XOdTnT/M/eF4hoW0yxO5YKfgurgosz
+                OjAnn7+Ed5S5Sh8E4EHUGCcawErZEZCtlsns0fNPGfNjadZAjq0X+5VP1EVXca0B
+                VrSp9ZTif3cvyxNTOogbgA==
+                -----END PRIVATE KEY-----
+                """;
+
+    // When
+    PrivateKey privateKey = CertUtils.pemKey2PrivateKey(pemKey);
+
+    // Then
+    assertNotNull(privateKey);
+    assertTrue(privateKey instanceof java.security.interfaces.RSAPrivateKey);
+  }
+
+  @Test
+  void whenPemKey2PrivateKeyThenInvalidKey() {
+    // Given
+    String invalidPemKey = """
+                -----BEGIN PRIVATE KEY-----
+                NOT VALID KEY
+                -----END PRIVATE KEY-----
+                """;
+
+    // Then
+    assertThrows(InvalidKeySpecException.class, () -> CertUtils.pemKey2PrivateKey(invalidPemKey));
+  }
+
+  @Test
+  void whenPemKey2PrivateKeyThenNullKey() {
+    // Given
+    String nullKey = null;
+
+    // Then
+    assertThrows(NullPointerException.class, () -> CertUtils.pemKey2PrivateKey(nullKey));
+  }
+
+  @Test
+  void whenExtractInlinePemBodyThenValidPem() {
+    // Given
+    String pemKey = """
+                -----BEGIN PRIVATE KEY-----
+                MIIEvQIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBALzbdGZIkI5wsRwl
+                OjiZlQCvdS8/JXbbE29AQSkCAwEAAQ==
+                -----END PRIVATE KEY-----
+                """;
+
+    // When
+    String extractedBody = CertUtils.extractInlinePemBody(pemKey);
+
+    // Then
+    assertFalse(extractedBody.contains("BEGIN PRIVATE KEY"));
+    assertFalse(extractedBody.contains("END PRIVATE KEY"));
+    assertFalse(extractedBody.contains("\n"));
+  }
+}