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Require Text Files Checksum

This rule checks that the specified text file has an given checksum. For binary files use Require Files Checksum instead. To make sure the checksum is the same on all platforms the text file's line separators are normalized to Unix (\n, default) or optionally Windows (\r\n).

The following parameters are supported by this rule:

  • message - an optional message to the user if the rule fails. If not set a default message will be used.
  • nonexistentFileMessage - an optional message to the user if the file is missing. If not set a default message will be used.
  • file - A file to check.
  • checksum - Expected file checksum.
  • type - Type of hashing algorithm to calculate the checksum. May be one of "md5", "sha1", "sha256", "sha384", or "sha512".
  • normalizeLineSeparatorTo - optionally specifies to which line separators to normalize prior to checksum calculation. Either "WINDOWS" or "UNIX". By default "UNIX".
  • encoding - the character encoding used by the file. One of the Default Java Charset names. By default set to ${project.build.sourceEncoding}

Sample Plugin Configuration:

<project>
  [...]
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-enforcer-plugin</artifactId>
        <version>3.0.0</version>
        <executions>
          <execution>
            <id>enforce-checksum</id>
            <goals>
              <goal>enforce</goal>
            </goals>
            <configuration>
              <rules>
                <requireTextFileChecksum>
                  <file>E:\java-workspace\apache-maven-enforcer\maven-enforcer\target\checkout\enforcer-rules\target\classes/foo.txt</file>
                  <checksum>d41d8cd98f00b204e9800998ecf8427e</checksum>
                  <type>md5</type>
                </requireTextFileChecksum>
                <requireTextFileChecksum>
                  <file>E:\java-workspace\apache-maven-enforcer\maven-enforcer\target\checkout\enforcer-rules\target\classes/bar.txt</file>
                  <checksum>da39a3ee5e6b4b0d3255bfef95601890afd80709</checksum>
                  <type>sha1</type>
                  <encoding>UTF-8</encoding>
                </requireTextFileChecksum>
                <requireTextFileChecksum>
                  <file>E:\java-workspace\apache-maven-enforcer\maven-enforcer\target\checkout\enforcer-rules\target\classes/baz.txt</file>
                  <checksum>e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855</checksum>
                  <type>sha256</type>
                  <normalizeLineSeparatorTo>WINDOWS</normalizeLineSeparatorTo>
                </requireTextFileChecksum>
                <requireTextFileChecksum>
                  <file>E:\java-workspace\apache-maven-enforcer\maven-enforcer\target\checkout\enforcer-rules\target\classes/qux.txt</file>
                  <checksum>38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da274edebfe76f65fbd51ad2f14898b95b</checksum>
                  <type>sha384</type>
                </requireTextFileChecksum>
                <requireTextFileChecksum>
                  <file>E:\java-workspace\apache-maven-enforcer\maven-enforcer\target\checkout\enforcer-rules\target\classes/quux.txt</file>
                  <checksum>cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e</checksum>
                  <type>sha512</type>
                </requireTextFileChecksum>
              </rules>
              <fail>true</fail>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
  [...]
</project>