Fix #1425

src/main/java/com/fasterxml/jackson/databind/node/TextNode.java

@@ -6,9 +6,9 @@
 import com.fasterxml.jackson.core.io.CharTypes;
 import com.fasterxml.jackson.core.io.NumberInput;
 import com.fasterxml.jackson.core.util.ByteArrayBuilder;
+
 import com.fasterxml.jackson.databind.SerializerProvider;
 import com.fasterxml.jackson.databind.exc.InvalidFormatException;
-import com.fasterxml.jackson.databind.util.ClassUtil;
 
 /**
  * Value node that contains a text value.

src/test/java/com/fasterxml/jackson/databind/deser/jdk/BaseDecodingTest.java

@@ -0,0 +1,50 @@
+package com.fasterxml.jackson.databind.deser.jdk;
+
+import java.nio.charset.StandardCharsets;
+
+import com.fasterxml.jackson.databind.*;
+import com.fasterxml.jackson.databind.exc.InputMismatchException;
+
+// Mostly for [databind#1425]; not in optimal place (as it also has
+// tree-access tests), but has to do for now
+public class BaseDecodingTest extends BaseMapTest
+{
+    private final ObjectMapper MAPPER = objectMapper();
+
+    private final byte[] HELLO_BYTES = "hello".getBytes(StandardCharsets.UTF_8);
+    private final String BASE64_HELLO = "aGVsbG8=";
+
+    // for [databind#1425]
+    public void testInvalidBase64() throws Exception
+    {
+        byte[] b = MAPPER.readValue(quote(BASE64_HELLO), byte[].class);
+        assertEquals(HELLO_BYTES, b);
+
+        _testInvalidBase64(MAPPER, BASE64_HELLO+"!");
+        _testInvalidBase64(MAPPER, BASE64_HELLO+"!!");
+    }
+
+    private void _testInvalidBase64(ObjectMapper mapper, String value) throws Exception
+    {
+        // First, use data-binding
+        try {
+            MAPPER.readValue(quote(value), byte[].class);
+            fail("Should not pass");
+        } catch (InputMismatchException e) {
+            verifyException(e, "Failed to decode");
+            verifyException(e, "as base64");
+            verifyException(e, "Illegal character '!'");
+        }
+
+        // and then tree model
+        JsonNode tree = mapper.readTree(String.format("{\"foo\":\"%s\"}", value));
+        JsonNode nodeValue = tree.get("foo");
+        try {
+            /*byte[] b =*/ nodeValue.binaryValue();
+            fail("Should not pass");
+        } catch (InputMismatchException e) {
+            verifyException(e, "Can not access contents of TextNode as binary");
+            verifyException(e, "Illegal character '!'");
+        }
+    }
+}