Package org.apache.hadoop.security.authentication.util

Class Signer

java.lang.Object
org.apache.hadoop.security.authentication.util.Signer
public class Signer extends Object
Signs strings and verifies signed strings using a SHA digest.

  • Constructor Details

    • Signer

      public Signer(SignerSecretProvider secretProvider)
      Creates a Signer instance using the specified SignerSecretProvider. The SignerSecretProvider should already be initialized.
      Parameters:
      secretProvider - The SignerSecretProvider to use

  • Method Details

    • sign

      public String sign(String str)
      Returns a signed string.
      Parameters:
      str - string to sign.
      Returns:
      the signed string.

    • verifyAndExtract

      public String verifyAndExtract(String signedStr) throws SignerException
      Verifies a signed string and extracts the original string.
      Parameters:
      signedStr - the signed string to verify and extract.
      Returns:
      the extracted original string.
      Throws:
      SignerException - thrown if the given string is not a signed string or if the signature is invalid.

    • computeSignature

      protected String computeSignature(byte[] secret, String str)
      Returns then signature of a string.
      Parameters:
      secret - The secret to use
      str - string to sign.
      Returns:
      the signature for the string.

    • checkSignatures

      protected void checkSignatures(String rawValue, String originalSignature) throws SignerException
      Throws:
      SignerException