P4ADEV-1341 add PdndUtilsTest

src/main/java/it/gov/pagopa/payhub/pdnd/utils/CertUtils.java

@@ -11,6 +11,7 @@
 import java.util.Base64;
 
 public class CertUtils {
+    private CertUtils(){}
 
     public static RSAPrivateKey pemKey2PrivateKey(String privateKey) throws InvalidKeySpecException, NoSuchAlgorithmException, IOException {
         String keyStringFormat =  extractInlinePemBody(privateKey);

src/main/java/it/gov/pagopa/payhub/pdnd/utils/PdndUtils.java

@@ -8,9 +8,6 @@
 import com.nimbusds.jwt.JWTClaimsSet;
 import com.nimbusds.jwt.SignedJWT;
 import it.gov.pagopa.payhub.pdnd.config.PdndConfig;
-import java.io.IOException;
-import java.security.NoSuchAlgorithmException;
-import java.security.spec.InvalidKeySpecException;
 import java.util.Date;
 import java.util.UUID;
 import org.springframework.stereotype.Service;
@@ -26,11 +23,11 @@ public PdndUtils(PdndConfig pdndConfig) {
 
   public String buildPdndClientAssertion()
       throws Exception {
-    JWTClaimsSet claims = setPdndClientAssertionClaims();
+    JWTClaimsSet claims = buildPdndClientAssertionClaims();
     return signPdndJWT(claims);
   }
 
-  private JWTClaimsSet setPdndClientAssertionClaims() {
+  public JWTClaimsSet buildPdndClientAssertionClaims() {
     long now = System.currentTimeMillis() / 1000;
     return new JWTClaimsSet.Builder()
         .issuer(pdndConfig.getClientId())
@@ -43,7 +40,7 @@ private JWTClaimsSet setPdndClientAssertionClaims() {
         .build();
   }
 
-  private String signPdndJWT(JWTClaimsSet claims) throws Exception {
+  public String signPdndJWT(JWTClaimsSet claims) throws Exception {
     JWSSigner signer = new RSASSASigner(CertUtils.pemKey2PrivateKey(pdndConfig.getKey()));
     SignedJWT signedJWT = new SignedJWT(
         new JWSHeader.Builder(JWSAlgorithm.RS256)

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

@@ -0,0 +1,118 @@
+package it.gov.pagopa.payhub.pdnd.utils;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.times;
+
+import com.nimbusds.jwt.JWTClaimsSet;
+import com.nimbusds.jwt.SignedJWT;
+import it.gov.pagopa.payhub.pdnd.config.PdndConfig;
+import java.util.Date;
+import java.util.UUID;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+@ExtendWith(MockitoExtension.class)
+class PdndUtilsTest {
+
+  @InjectMocks
+  private PdndUtils pdndUtils;
+
+  @Mock
+  private PdndConfig pdndConfig;
+
+  private String pemKey = """
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
+        """;
+
+
+  @Test
+  void whenBuildPdndClientAssertionThesVerify() throws Exception {
+    // When
+    Mockito.when(pdndConfig.getClientId()).thenReturn("CLIENTID");
+    Mockito.when(pdndConfig.getAudience()).thenReturn("AUDIENCE");
+    Mockito.when(pdndConfig.getPurposeId()).thenReturn("PURPOSEID");
+    Mockito.when(pdndConfig.getKey()).thenReturn(pemKey);
+    Mockito.when(pdndConfig.getKid()).thenReturn("KID");
+
+    String token = pdndUtils.buildPdndClientAssertion();
+
+    // Then
+    assertNotNull(token);
+    Mockito.verify(pdndConfig, times(2)).getClientId();
+    Mockito.verify(pdndConfig).getAudience();
+    Mockito.verify(pdndConfig).getPurposeId();
+    Mockito.verify(pdndConfig).getKey();
+    Mockito.verify(pdndConfig).getKid();
+  }
+
+  @Test
+  void whenBuildPdndClientAssertionClaimsThenVerify() {
+    // Given
+    Mockito.when(pdndConfig.getClientId()).thenReturn("CLIENTID");
+    Mockito.when(pdndConfig.getAudience()).thenReturn("AUDIENCE");
+    Mockito.when(pdndConfig.getPurposeId()).thenReturn("PURPOSEID");
+    // When
+    JWTClaimsSet claims = pdndUtils.buildPdndClientAssertionClaims();
+
+    // Then
+    assertNotNull(claims);
+    assertEquals("CLIENTID", claims.getIssuer());
+    assertEquals("CLIENTID", claims.getSubject());
+    assertEquals("AUDIENCE", claims.getAudience().get(0));
+    assertEquals("PURPOSEID", claims.getClaim("purposeId"));
+    assertNotNull(claims.getIssueTime());
+    assertNotNull(claims.getExpirationTime());
+    assertNotNull(claims.getJWTID());
+  }
+
+  @Test
+  void whenSignPdndJWTThenVerify() throws Exception {
+    Mockito.when(pdndConfig.getKey()).thenReturn(pemKey);
+
+    JWTClaimsSet claims = new JWTClaimsSet.Builder()
+        .issuer("CLIENTID")
+        .subject("SUBJECT")
+        .audience("AUDIENCE")
+        .issueTime(new Date())
+        .expirationTime(new Date(System.currentTimeMillis() + 300000))
+        .jwtID(UUID.randomUUID().toString())
+        .build();
+
+    String signedJWT = pdndUtils.signPdndJWT(claims);
+
+    SignedJWT parsedJWT = SignedJWT.parse(signedJWT);
+    assertNotNull(parsedJWT);
+    assertEquals("CLIENTID", parsedJWT.getJWTClaimsSet().getIssuer());
+  }
+}