Examples of java.security.Signature.verify()

java.security.Signature.verify()
Verifies the passed-in signature.
A call to this method resets this signature object to the state it was in when previously initialized for verification via a call to initVerify(PublicKey). That is, the object is reset and available to verify another signature from the identity whose public key was specified in the call to initVerify. @param signature the signature bytes to be verified. @return true if the signature was verified, false if not. @exception SignatureException if this signature object is not initialized properly, the passed-in signature is improperly encoded or of the wrong type, if this signature algorithm is unable to process the input data provided, etc.

    }


    // Check signature
    boolean trusted = false;
    try {
      trusted = signature.verify(identity.getSignature());
    } catch (SignatureException e) {
      if (logger.isLoggable(BasicLevel.ERROR))
        logger.log(BasicLevel.ERROR, "EXCEPTION:: validate", e);
      throw new Exception("The signature found in the identity '" + this + "' is invalid:" + e.getMessage());
    }

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      if ( signature == null ){
                
        throw( new AEVerifierException( AEVerifierException.FT_SIGNATURE_MISSING, "Signature missing from file" ));
      }
      
      if ( !sig.verify( signature )){
        
        throw( new AEVerifierException( AEVerifierException.FT_SIGNATURE_BAD, "Signature doesn't match data" ));
      }
    }finally{

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    sig.initVerify( public_key );
    
    sig.update( data.getBytes( "UTF-8" ));
      
    if ( !sig.verify( signature )){
      
      throw( new AEVerifierException( AEVerifierException.FT_SIGNATURE_BAD, "Data verification failed, signature doesn't match data" ));
    }
  }
}

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    Signature sig = Signature.getInstance(getSigAlgName(), sigProvider);


    sig.initVerify(key);
    sig.update(this.getTBSCertList());
    if ( !sig.verify(this.getSignature()) )
    {
      throw new SignatureException("CRL does not verify with supplied public key.");
    }
  }

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        check.update(rawRemoteOtherPubkey);
        
        check.update(rawRemoteEphemeralPubkey);
        
        if ( check.verify(remoteSig)){
                    
          ecDH.doPhase(CryptoECCUtils.rawdataToPubkey(rawRemoteEphemeralPubkey), true);
          
          sharedSecret = ecDH.generateSecret();

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        check.update(IV);
          
        check.update(sharedSecret);
          
        if ( !check.verify(remoteSig)){
  
          throw( new CryptoManagerException( "Signature check failed" ));
        }
      }
    }catch( CryptoManagerException  e ){

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    Signature sig = CryptoECCUtils.getSignature( pub );
    
    try{
      sig.update( data );
      
      return( sig.verify( signature ));
      
    }catch( Throwable e ){
      
      throw( new CryptoManagerException( "Signature failed", e ));
    }

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    try{
      Signature signature = CryptoECCUtils.getSignature( CryptoECCUtils.rawdataToPubkey( public_key ));
  
      signature.update( encode( hash, version, size ));
  
      return( signature.verify( sig ));
      
    }catch( Throwable e ){
      
      Debug.out( e );

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      verifier.initVerify( key_block_public_key );
      
      verifier.update( kb.getRequest() );


      if ( !verifier.verify( kb.getCertificate())){
      
        log.log( "KB: request verify failed for " + DHTLog.getString2( kb.getKey()));


        filter.add( id );

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      verifier.initVerify( key_block_public_key );
      
      verifier.update( request );


      if ( !verifier.verify( signature )){
      
        return( false );
      }
      
      return( true );

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