Package org.apache.tomcat.util.security

Class ConcurrentMessageDigest

  • public class ConcurrentMessageDigest
extends java.lang.Object
    A thread safe wrapper around MessageDigest that does not make use of ThreadLocal and - broadly - only creates enough MessageDigest objects to satisfy the concurrency requirements.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static byte[] digest​(java.lang.String algorithm, byte[]... input)
      Computes the digest of the given input byte arrays using the specified algorithm.
      static byte[] digest​(java.lang.String algorithm, int iterations, byte[]... input)
      Computes the digest of the given input byte arrays using the specified algorithm and number of iterations.
      static byte[] digestMD5​(byte[]... input)
      Computes the MD5 digest of the given input byte arrays.
      static byte[] digestSHA1​(byte[]... input)
      Computes the SHA-1 digest of the given input byte arrays.
      static byte[] digestSHA256​(byte[]... input)
      Computes the SHA-256 digest of the given input byte arrays.
      static void init​(java.lang.String algorithm)
      Ensures that digest(String, byte[][]) will support the specified algorithm.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Method Detail

      • digestMD5

        public static byte[] digestMD5​(byte[]... input)
        Computes the MD5 digest of the given input byte arrays.
        Parameters:
        input - the byte arrays to digest
        Returns:
        the MD5 digest

      • digestSHA1

        public static byte[] digestSHA1​(byte[]... input)
        Computes the SHA-1 digest of the given input byte arrays.
        Parameters:
        input - the byte arrays to digest
        Returns:
        the SHA-1 digest

      • digestSHA256

        public static byte[] digestSHA256​(byte[]... input)
        Computes the SHA-256 digest of the given input byte arrays.
        Parameters:
        input - the byte arrays to digest
        Returns:
        the SHA-256 digest

      • digest

        public static byte[] digest​(java.lang.String algorithm,
                            byte[]... input)
        Computes the digest of the given input byte arrays using the specified algorithm.
        Parameters:
        algorithm - the message digest algorithm name
        input - the byte arrays to digest
        Returns:
        the digest

      • digest

        public static byte[] digest​(java.lang.String algorithm,
                            int iterations,
                            byte[]... input)
        Computes the digest of the given input byte arrays using the specified algorithm and number of iterations. Multiple iterations are performed by re-digesting the result of the previous iteration.
        Parameters:
        algorithm - the message digest algorithm name
        iterations - the number of times to apply the digest
        input - the byte arrays to digest
        Returns:
        the digest

      • init

        public static void init​(java.lang.String algorithm)
                 throws java.security.NoSuchAlgorithmException
        Ensures that digest(String, byte[][]) will support the specified algorithm. This method must be called and return successfully before using digest(String, byte[][]).
        Parameters:
        algorithm - The message digest algorithm to be supported
        Throws:
        java.security.NoSuchAlgorithmException - If the algorithm is not supported by the JVM