adds test for password helper function

Signed-off-by: Max Thonagel <[email protected]>

backend/src/main/java/com/bakdata/conquery/models/auth/basic/PasswordHelper.java

@@ -22,7 +22,11 @@ public class PasswordHelper {
 			CompressedPBKDF2Function.class, CompressedPBKDF2Function::getInstanceFromHash
 	);
 
-	HashingFunction getHashingFunction(String hash) {
+	/**
+	 * Determines the function used to create the provided hash.
+	 * The function can be used to hash a plain credential in order to check the hashes for equality.
+	 */
+	public HashingFunction getHashingFunction(String hash) {
 		for (Map.Entry<Class<? extends HashingFunction>, Function<String, HashingFunction>> hashFunctionGenerator : HASH_FUNCTION_GENERATORS.entrySet()) {
 			try {
 				return hashFunctionGenerator.getValue().apply(hash);

backend/src/test/java/com/bakdata/conquery/util/PasswordHelperTest.java

@@ -0,0 +1,54 @@
+package com.bakdata.conquery.util;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.stream.Stream;
+
+import com.bakdata.conquery.models.auth.basic.PasswordHelper;
+import com.password4j.Argon2Function;
+import com.password4j.BcryptFunction;
+import com.password4j.CompressedPBKDF2Function;
+import com.password4j.HashingFunction;
+import com.password4j.ScryptFunction;
+import com.password4j.types.Argon2;
+import com.password4j.types.Bcrypt;
+import com.password4j.types.Hmac;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+public class PasswordHelperTest {
+
+
+	/**
+	 * Arguments where generated with:
+	 *
+	 * <pre>
+	 * import com.password4j.Password;
+	 *
+	 * class Scratch {
+	 * 	public static void main(String[] args) {
+	 * 		System.out.println(Password.hash("test").withArgon2().getResult());
+	 * 		System.out.println(Password.hash("test").withScrypt().getResult());
+	 * 		System.out.println(Password.hash("test").withBcrypt().getResult());
+	 * 		System.out.println(Password.hash("test").withCompressedPBKDF2().getResult());
+	 *        }
+	 * }
+	 * </pre>
+	 */
+	static Stream<Arguments> arguments() {
+		return Stream.of(
+				Arguments.arguments("$argon2id$v=19$m=15360,t=2,p=1$r35m/UGz8lq4ICjcNkb2GUcfYub07450QRTTapYwiJCQDOI9Maa0dlym/iL0AceTNNXgaxLUyGB5EfJoqr+Wng$WVnHZU8uwvufgWPlVh5T+MnTtX5Ry0hhCD0ej90L0Kk", Argon2Function.getInstance(15360, 2, 1, 32, Argon2.ID)),
+				Arguments.arguments("$100801$SBpPHCtLT+2FbJ2BS49J4sgRXfvduVm17U9yd0Ygky/3MgUgK1r4LMixKSQX4LQjSEuE6tV8ibABXXAr9tCZKA==$aPTssj2maVw34QgrhRIsUHu6irB1NrjiFpdpUXFHHA+XhjPG03PKrbj5CBXJx3cCUosU/IARQliSW2LWRLFtiw==", ScryptFunction.getInstance(65536, 8, 1, 64)),
+				Arguments.arguments("$2b$10$YMPj.MoAs81tO8HzrCYxnOujaPwbu5SGsSrdNyxdIJ9BlBIv9i0t.", BcryptFunction.getInstance(Bcrypt.B, 10)),
+				Arguments.arguments("$3$1331439861760256$+Rqke26gKhtP60UkVR2a3SfszrOkVrMiJ6LZUWvl2vI5OpW815zKiod8Sdz3aOcuajo6c1iKEXcWjk61emmgTw==$CiH0mwqibUZD5R5HqFNpaYCkWjiYcTQe0sjG+4ZYw/A=", CompressedPBKDF2Function.getInstance(Hmac.SHA256, 310000, 256))
+		);
+	}
+
+	@ParameterizedTest
+	@MethodSource("arguments")
+	void test(String hash, HashingFunction hashProvider) {
+		assertThat(PasswordHelper.getHashingFunction(hash)).isEqualTo(hashProvider);
+
+	}
+}