• Home
• uk.gov.ida
• saml-lib
• 3.4.6-259
• source code
• Base64StringDecoder.java

×

Project download

Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $

You can buy this project and download/modify it how often you want.

uk.gov.ida.saml.deserializers.validators.Base64StringDecoder Maven / Gradle / Ivy

package uk.gov.ida.saml.deserializers.validators;

import net.shibboleth.utilities.java.support.codec.Base64Support;
import org.apache.commons.codec.binary.StringUtils;
import uk.gov.ida.saml.core.validation.SamlTransformationErrorException;
import uk.gov.ida.saml.core.validation.SamlValidationSpecificationFailure;

import static java.util.regex.Pattern.matches;
import static uk.gov.ida.saml.core.validation.errors.SamlTransformationErrorFactory.invalidBase64Encoding;

public class Base64StringDecoder {

    public String decode(String input) {
        String withoutWhitespace = input.replaceAll("\\s", "");
        if (!matches("^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{4}|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)$", withoutWhitespace)) {
            SamlValidationSpecificationFailure failure = invalidBase64Encoding(input);
            throw new SamlTransformationErrorException(failure.getErrorMessage(), failure.getLogLevel());
        }

        return StringUtils.newStringUtf8(Base64Support.decode(input));
    }

}