package org.apereo.cas.configuration.support;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.jasypt.encryption.pbe.StandardPBEStringEncryptor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.env.Environment;

import java.security.Security;
import java.util.HashMap;
import java.util.Map;

/**
 * This is {@link CasConfigurationJasyptDecryptor}.
 *
 * @author Misagh Moayyed
 * @since 5.1.0
 */
public class CasConfigurationJasyptDecryptor {
    private static final Logger LOGGER = LoggerFactory.getLogger(CasConfigurationJasyptDecryptor.class);

    private static final String ENCRYPTED_VALUE_PREFIX = "{cipher}";

    private enum JasyptEncryptionParameters {

        ALGORITHM("cas.standalone.config.security.alg", "PBEWithMD5AndTripleDES"),
        PROVIDER("cas.standalone.config.security.provider", null),
        ITERATIONS("cas.standalone.config.security.iteration", null),
        PASSWORD("cas.standalone.config.security.psw", null);

        private String name;
        private String defaultValue;

        JasyptEncryptionParameters(final String name, final String defaultValue) {
            this.name = name;
            this.defaultValue = defaultValue;
        }

        public String getName() {
            return name;
        }

        public String getDefaultValue() {
            return defaultValue;
        }
    }

    private final StandardPBEStringEncryptor decryptor;

    public CasConfigurationJasyptDecryptor(final Environment environment) {
        this.decryptor = new StandardPBEStringEncryptor();

        final String alg = getJasyptParamFromEnv(environment, JasyptEncryptionParameters.ALGORITHM);
        if (StringUtils.isNotBlank(alg)) {
            LOGGER.debug("Configured decryptor algorithm", alg);
            decryptor.setAlgorithm(alg);
        }

        final String psw = getJasyptParamFromEnv(environment, JasyptEncryptionParameters.PASSWORD);
        if (StringUtils.isNotBlank(psw)) {
            LOGGER.debug("Configured decryptor password");
            decryptor.setPassword(psw);
        }

        final String pName = getJasyptParamFromEnv(environment, JasyptEncryptionParameters.PROVIDER);
        if (StringUtils.isNotBlank(pName)) {
            LOGGER.debug("Configured decryptor provider");
            if (StringUtils.equals(pName, BouncyCastleProvider.PROVIDER_NAME)) {
                Security.addProvider(new BouncyCastleProvider());
            }
            this.decryptor.setProviderName(pName);
        }
        final String iter = getJasyptParamFromEnv(environment, JasyptEncryptionParameters.ITERATIONS);
        if (StringUtils.isNotBlank(iter) && NumberUtils.isCreatable(iter)) {
            LOGGER.debug("Configured decryptor iterations");
            decryptor.setKeyObtentionIterations(Integer.valueOf(iter));
        }
    }

    private String getJasyptParamFromEnv(final Environment environment, final JasyptEncryptionParameters param) {
        return environment.getProperty(param.getName(), param.getDefaultValue());
    }

    /**
     * Decrypt map.
     *
     * @param settings the settings
     * @return the map
     */
    public Map<Object, Object> decrypt(final Map<Object, Object> settings) {
        final Map<Object, Object> decrypted = new HashMap<>();
        settings.entrySet()
                .forEach(entry -> {
                    String stringValue = getStringPropertyValue(entry.getValue());
                    if (stringValue != null && stringValue.startsWith(ENCRYPTED_VALUE_PREFIX)) {
                        try {
                            if (!this.decryptor.isInitialized()) {
                                this.decryptor.initialize();
                            }

                            final String encValue = stringValue.substring(ENCRYPTED_VALUE_PREFIX.length());
                            LOGGER.debug("Decrypting property [{}]...", entry.getKey());
                            final String value = this.decryptor.decrypt(encValue);
                            decrypted.put(entry.getKey(), value);
                        } catch (final Exception e) {
                            LOGGER.error("Could not decrypt property [{}]. Setting will be ignored by CAS", entry.getKey(), e);
                        }
                    } else {
                        decrypted.put(entry.getKey(), entry.getValue());
                    }
                });
        return decrypted;
    }

    /**
     * Retrieves the {@link String} of an {@link Object}
     *
     * @param propertyValue The property value to cast
     * @return A {@link String} representing the property value or {@code null} if it is not a {@link String}
     */
    private String getStringPropertyValue(final Object propertyValue) {
        return propertyValue instanceof String ? (String) propertyValue : null;
    }
}

@@ -3493,16 +3493,22 @@
         
+final 
 String s
@@ -3585,16 +3585,39 @@
      if 
+(StringUtils.isNotBlank
 (stringV
@@ -3624,16 +3624,9 @@
 alue
- != null
+)
  && 
@@ -3855,33 +3855,32 @@
               %7D%0A
-%0A
                 
@@ -4658,16 +4658,17 @@
  Object%7D
+.
 %0A     *%0A
@@ -4964,17 +4964,8 @@
 ng ?
- (String)
  pro
@@ -4974,16 +4974,27 @@
 rtyValue
+.toString()
  : null;

Fix check style issues