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IMPL: Added new Pattern Builder and Unit Test (#19)
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47 changes: 47 additions & 0 deletions
47
...in/java/com/ebay/ejmask/extenstion/builder/json/JsonValueUnmaskFromEndPatternBuilder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| package com.ebay.ejmask.extenstion.builder.json; | ||
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| import com.ebay.ejmask.extenstion.builder.AbstractRegexPatternBuilder; | ||
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| /** | ||
| * An implementation of IPatternBuilder to support high sensitive JSON field, whose value | ||
| * need to be partially masked with relative field from end of the field. | ||
| * | ||
| * @author parasdharwal33 | ||
| */ | ||
| public class JsonValueUnmaskFromEndPatternBuilder extends AbstractRegexPatternBuilder { | ||
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| //https://regex101.com/r/LL3EY7/1/ | ||
| private static final String PATTERN_TEMPLATE = "\\\"(%s)(\\\\*\\\"\\s*:\\s*\\\\*\\\")[^\\\"]*([^\\\\\"]{%d})(\\\\?\\\"|)"; | ||
| //group $1 = field name | ||
| //group $2 = ":" (with json serialization support) | ||
| //group $3 = sensitive information -> unmasked | ||
| //group $4 = ending qts | ||
| private static final String REPLACEMENT_TEMPLATE = "\"$1$2xxxx-$3$4"; | ||
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| /** | ||
| * Build pattern to match | ||
| * | ||
| * @param visibleCharacters as no of characters to be visible. | ||
| * @param fieldNames as list of field names | ||
| * @return match pattern | ||
| */ | ||
| @Override | ||
| public String buildPattern(int visibleCharacters, String... fieldNames) { | ||
| if (visibleCharacters < 0) { | ||
| throw new IllegalArgumentException("visibleCharacters must be a value greater than zero instead of " + visibleCharacters); | ||
| } | ||
| return String.format(PATTERN_TEMPLATE, super.buildFieldNamesForRegexOr(fieldNames), visibleCharacters); | ||
| } | ||
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| /** | ||
| * Build pattern to replace. | ||
| * | ||
| * @param visibleCharacters as no of characters to be visible. | ||
| * @param fieldNames as list of field names | ||
| * @return match pattern | ||
| */ | ||
| @Override | ||
| public String buildReplacement(int visibleCharacters, String... fieldNames) { | ||
| return REPLACEMENT_TEMPLATE; | ||
| } | ||
| } |
105 changes: 105 additions & 0 deletions
105
...ava/com/ebay/ejmask/extenstion/builder/json/JsonValueUnmaskFromEndPatternBuilderTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| package com.ebay.ejmask.extenstion.builder.json; | ||
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| import org.junit.jupiter.api.Assertions; | ||
| import org.junit.jupiter.api.Test; | ||
| import org.junit.jupiter.params.ParameterizedTest; | ||
| import org.junit.jupiter.params.provider.Arguments; | ||
| import org.junit.jupiter.params.provider.MethodSource; | ||
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| import java.util.regex.Pattern; | ||
| import java.util.stream.Stream; | ||
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| public class JsonValueUnmaskFromEndPatternBuilderTest { | ||
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| public static final JsonValueUnmaskFromEndPatternBuilder instance = new JsonValueUnmaskFromEndPatternBuilder(); | ||
| public static final String[] fieldNames = new String[]{"ccNumber", "ssn"}; | ||
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| @Test | ||
| public void testBuildPattern() { | ||
| int visibleCharacters = 4; | ||
| String result = instance.buildPattern(visibleCharacters, fieldNames); | ||
| Assertions.assertEquals("\\\"(ccNumber|ssn)(\\\\*\\\"\\s*:\\s*\\\\*\\\")[^\\\"]*([^\\\\\"]{4})(\\\\?\\\"|)", result); | ||
| } | ||
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| @Test | ||
| public void testBuildPattern_withNegativeVisibleCharacters() { | ||
| int visibleCharacters = -1; | ||
| Assertions.assertThrows(IllegalArgumentException.class, () -> instance.buildPattern(visibleCharacters, fieldNames)); | ||
| } | ||
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| @Test | ||
| public void testBuildReplacement() { | ||
| int visibleCharacters = 4; | ||
| String result = instance.buildReplacement(visibleCharacters, fieldNames); | ||
| Assertions.assertEquals("\"$1$2xxxx-$3$4", result); | ||
| } | ||
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| @ParameterizedTest | ||
| @MethodSource("dataForTestMatch") | ||
| public void testMatch(String name, String data, String expected) { | ||
| String regex = instance.buildPattern(4, fieldNames); | ||
| String replacement = instance.buildReplacement(4, fieldNames); | ||
| Pattern pattern = Pattern.compile(regex); | ||
| String result = pattern.matcher(data).replaceAll(replacement); | ||
| Assertions.assertFalse(result.contains("1234567890")); | ||
| Assertions.assertEquals(expected, result); | ||
| } | ||
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| static Stream<Arguments> dataForTestMatch() { | ||
| return Stream.of( | ||
| Arguments.arguments( | ||
| "test with normal json", | ||
| "{\"ccNumber\":\"1234567890123456\",\"ssn\":\"123456789\",\"nonSensitiveData\":\"data\"}", | ||
| "{\"ccNumber\":\"xxxx-3456\",\"ssn\":\"xxxx-6789\",\"nonSensitiveData\":\"data\"}" | ||
| ), | ||
| Arguments.arguments( | ||
| "test with empty values", | ||
| "{\"ccNumber\":\"\",\"ssn\":null,\"nonSensitiveData\":\"data\"}", | ||
| "{\"ccNumber\":\"\",\"ssn\":null,\"nonSensitiveData\":\"data\"}" | ||
| ), | ||
| Arguments.arguments( | ||
| "test with space", | ||
| "{\"ccNumber\" : \"1234567890123456\", \"ssn\" :\"123456789\",\"nonSensitiveData\":\"data\"}", | ||
| "{\"ccNumber\" : \"xxxx-3456\", \"ssn\" :\"xxxx-6789\",\"nonSensitiveData\":\"data\"}" | ||
| ), | ||
| Arguments.arguments( | ||
| "test with line break", | ||
| "{\n" | ||
| + " \"ccNumber\": \"1234567890123456\",\n" | ||
| + " \"ssn\": \"123456789\",\n" | ||
| + " \"nonSensitiveData\": \"data\"\n" | ||
| + "}", | ||
| "{\n" | ||
| + " \"ccNumber\": \"xxxx-3456\",\n" | ||
| + " \"ssn\": \"xxxx-6789\",\n" | ||
| + " \"nonSensitiveData\": \"data\"\n" | ||
| + "}" | ||
| ), | ||
| Arguments.arguments( | ||
| "test with broken json", | ||
| "{\"ccNumber\":\"1234567890123456\",\"ssn\":\"123456789", | ||
| "{\"ccNumber\":\"xxxx-3456\",\"ssn\":\"xxxx-6789" | ||
| ), | ||
| Arguments.arguments( | ||
| "test with json encoded json", | ||
| "{\\\"ccNumber\\\":\\\"1234567890123456\\\",\\\"ssn\\\":\\\"123456789\\\",\\\"nonSensitiveData\\\":\\\"data\\\"}", | ||
| "{\\\"ccNumber\\\":\\\"xxxx-3456\\\",\\\"ssn\\\":\\\"xxxx-6789\\\",\\\"nonSensitiveData\\\":\\\"data\\\"}" | ||
| ), | ||
| Arguments.arguments( | ||
| "test with double json encoded json", | ||
| "{\\\\\\\"ccNumber\\\\\\\":\\\\\\\"1234567890123456\\\\\\\",\\\\\\\"ssn\\\\\\\":\\\\\\\"123456789\\\\\\\",\\\\\\\"nonSensitiveData\\\\\\\":\\\\\\\"data\\\\\\\"}", | ||
| "{\\\\\\\"ccNumber\\\\\\\":\\\\\\\"xxxx-3456\\\\\\\",\\\\\\\"ssn\\\\\\\":\\\\\\\"xxxx-6789\\\\\\\",\\\\\\\"nonSensitiveData\\\\\\\":\\\\\\\"data\\\\\\\"}" | ||
| ), | ||
| Arguments.arguments( | ||
| "test with encoded broken json", | ||
| "{\\\"ccNumber\\\":\\\"1234567890123456\\\",\\\"ssn\\\":\\\"123456789", | ||
| "{\\\"ccNumber\\\":\\\"xxxx-3456\\\",\\\"ssn\\\":\\\"xxxx-6789" | ||
| ), | ||
| Arguments.arguments( | ||
| "test with encoded broken json 2", | ||
| "{\\\"ccNumber\\\":\\\"1234567890123456\\\",\\\"ssn\\\":\\\"123456789\\", | ||
| "{\\\"ccNumber\\\":\\\"xxxx-3456\\\",\\\"ssn\\\":\\\"xxxx-6789\\" | ||
| ) | ||
| ); | ||
| } | ||
| } |
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