Class ConcurrentMessageDigest

java.lang.Object
org.apache.tomcat.util.security.ConcurrentMessageDigest
public class ConcurrentMessageDigest extends 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

    Modifier and Type
    Method
    Description
    static byte[]
    digest(String algorithm, byte[]... input)
    Computes the digest of the given input byte arrays using the specified algorithm.
    static byte[]
    digest(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(String algorithm)
    Ensures that digest(String, byte[][]) will support the specified algorithm.

    Methods inherited from class Object

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

  • Method Details

    • 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(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(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(String algorithm) throws 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:
      NoSuchAlgorithmException - If the algorithm is not supported by the JVM