/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.xml.security.utils;

public final class EncryptionConstants {
    // Attributes that exist in XML Signature in the same way
    /** Tag of Attr Algorithm **/
    public static final String _ATT_ALGORITHM              = Constants._ATT_ALGORITHM;
    
    /** Tag of Attr Id**/
    public static final String _ATT_ID                     = Constants._ATT_ID;
    
    /** Tag of Attr Target **/
    public static final String _ATT_TARGET                 = Constants._ATT_TARGET;
    
    /** Tag of Attr Type **/
    public static final String _ATT_TYPE                   = Constants._ATT_TYPE;
    
    /** Tag of Attr URI **/
    public static final String _ATT_URI                    = Constants._ATT_URI;

    // Attributes new in XML Encryption
    /** Tag of Attr encoding **/
    public static final String _ATT_ENCODING               = "Encoding";
    
    /** Tag of Attr recipient **/
    public static final String _ATT_RECIPIENT              = "Recipient";
    
    /** Tag of Attr mimetype **/
    public static final String _ATT_MIMETYPE               = "MimeType";

    /** Tag of Element CarriedKeyName **/
    public static final String _TAG_CARRIEDKEYNAME         = "CarriedKeyName";
    
    /** Tag of Element CipherData **/
    public static final String _TAG_CIPHERDATA             = "CipherData";
    
    /** Tag of Element CipherReference **/
    public static final String _TAG_CIPHERREFERENCE        = "CipherReference";
    
    /** Tag of Element CipherValue **/
    public static final String _TAG_CIPHERVALUE            = "CipherValue";
    
    /** Tag of Element DataReference **/
    public static final String _TAG_DATAREFERENCE          = "DataReference";
    
    /** Tag of Element EncryptedData **/
    public static final String _TAG_ENCRYPTEDDATA          = "EncryptedData";
    
    /** Tag of Element EncryptedKey **/
    public static final String _TAG_ENCRYPTEDKEY           = "EncryptedKey";
    
    /** Tag of Element EncryptionMethod **/
    public static final String _TAG_ENCRYPTIONMETHOD       = "EncryptionMethod";
    
    /** Tag of Element EncryptionProperties **/
    public static final String _TAG_ENCRYPTIONPROPERTIES   = "EncryptionProperties";
    
    /** Tag of Element EncryptionProperty **/
    public static final String _TAG_ENCRYPTIONPROPERTY     = "EncryptionProperty";
    
    /** Tag of Element KeyReference **/
    public static final String _TAG_KEYREFERENCE           = "KeyReference";
    
    /** Tag of Element KeySize **/
    public static final String _TAG_KEYSIZE                = "KeySize";
    
    /** Tag of Element OAEPparams **/
    public static final String _TAG_OAEPPARAMS             = "OAEPparams";
    
    /** Tag of Element MGF **/
    public static final String _TAG_MGF                    = "MGF";
    
    /** Tag of Element ReferenceList **/
    public static final String _TAG_REFERENCELIST          = "ReferenceList";
    
    /** Tag of Element Transforms **/
    public static final String _TAG_TRANSFORMS             = "Transforms";
    
    /** Tag of Element AgreementMethod **/
    public static final String _TAG_AGREEMENTMETHOD        = "AgreementMethod";
    
    /** Tag of Element KA-Nonce **/
    public static final String _TAG_KA_NONCE               = "KA-Nonce";
    
    /** Tag of Element OriginatorKeyInfo **/
    public static final String _TAG_ORIGINATORKEYINFO      = "OriginatorKeyInfo";
    
    /** Tag of Element RecipientKeyInfo **/
    public static final String _TAG_RECIPIENTKEYINFO       = "RecipientKeyInfo";

    /** Field ENCRYPTIONSPECIFICATION_URL */
    public static final String ENCRYPTIONSPECIFICATION_URL = 
        "http://www.w3.org/TR/2001/WD-xmlenc-core-20010626/";

    /** The namespace of the 
     * <A HREF="http://www.w3.org/TR/2001/WD-xmlenc-core-20010626/">
     * XML Encryption Syntax and Processing</A> */
    public static final String EncryptionSpecNS = 
        "http://www.w3.org/2001/04/xmlenc#";
    
    /**
     * The namespace of the XML Encryption 1.1 specification
     */
    public static final String EncryptionSpec11NS = 
        "http://www.w3.org/2009/xmlenc11#";

    /** URI for content*/
    public static final String TYPE_CONTENT                = EncryptionSpecNS + "Content";
    
    /** URI for element*/
    public static final String TYPE_ELEMENT                = EncryptionSpecNS + "Element";
    
    /** URI for mediatype*/
    public static final String TYPE_MEDIATYPE              = 
        "http://www.isi.edu/in-notes/iana/assignments/media-types/";

    /** Block Encryption - REQUIRED TRIPLEDES */
    public static final String ALGO_ID_BLOCKCIPHER_TRIPLEDES = 
        EncryptionConstants.EncryptionSpecNS + "tripledes-cbc";
    
    /** Block Encryption - REQUIRED AES-128 */
    public static final String ALGO_ID_BLOCKCIPHER_AES128 = 
        EncryptionConstants.EncryptionSpecNS + "aes128-cbc";
    
    /** Block Encryption - REQUIRED AES-256 */
    public static final String ALGO_ID_BLOCKCIPHER_AES256 = 
        EncryptionConstants.EncryptionSpecNS + "aes256-cbc";
    
    /** Block Encryption - OPTIONAL AES-192 */
    public static final String ALGO_ID_BLOCKCIPHER_AES192 = 
        EncryptionConstants.EncryptionSpecNS + "aes192-cbc";
    
    /** Block Encryption - OPTIONAL AES-128-GCM */
    public static final String ALGO_ID_BLOCKCIPHER_AES128_GCM = 
        "http://www.w3.org/2009/xmlenc11#aes128-gcm";
    
    /** Block Encryption - OPTIONAL AES-192-GCM */
    public static final String ALGO_ID_BLOCKCIPHER_AES192_GCM = 
        "http://www.w3.org/2009/xmlenc11#aes192-gcm";
    
    /** Block Encryption - OPTIONAL AES-256-GCM */
    public static final String ALGO_ID_BLOCKCIPHER_AES256_GCM = 
        "http://www.w3.org/2009/xmlenc11#aes256-gcm";

    /** Key Transport - REQUIRED RSA-v1.5*/
    public static final String ALGO_ID_KEYTRANSPORT_RSA15 = 
        EncryptionConstants.EncryptionSpecNS + "rsa-1_5";
    
    /** Key Transport - REQUIRED RSA-OAEP */
    public static final String ALGO_ID_KEYTRANSPORT_RSAOAEP = 
        EncryptionConstants.EncryptionSpecNS + "rsa-oaep-mgf1p";
    
    /** Key Transport - OPTIONAL RSA-OAEP_11 */
    public static final String ALGO_ID_KEYTRANSPORT_RSAOAEP_11 = 
        EncryptionConstants.EncryptionSpec11NS + "rsa-oaep";

    /** Key Agreement - OPTIONAL Diffie-Hellman */
    public static final String ALGO_ID_KEYAGREEMENT_DH = 
        EncryptionConstants.EncryptionSpecNS + "dh";

    /** Symmetric Key Wrap - REQUIRED TRIPLEDES KeyWrap */
    public static final String ALGO_ID_KEYWRAP_TRIPLEDES = 
        EncryptionConstants.EncryptionSpecNS + "kw-tripledes";
    
    /** Symmetric Key Wrap - REQUIRED AES-128 KeyWrap */
    public static final String ALGO_ID_KEYWRAP_AES128 = 
        EncryptionConstants.EncryptionSpecNS + "kw-aes128";
    
    /** Symmetric Key Wrap - REQUIRED AES-256 KeyWrap */
    public static final String ALGO_ID_KEYWRAP_AES256 = 
        EncryptionConstants.EncryptionSpecNS + "kw-aes256";
    
    /** Symmetric Key Wrap - OPTIONAL AES-192 KeyWrap */
    public static final String ALGO_ID_KEYWRAP_AES192 = 
        EncryptionConstants.EncryptionSpecNS + "kw-aes192";

    /** Message Authentication - RECOMMENDED XML Digital Signature */
    public static final String ALGO_ID_AUTHENTICATION_XMLSIGNATURE = 
        "http://www.w3.org/TR/2001/CR-xmldsig-core-20010419/";

    /** Canonicalization - OPTIONAL Canonical XML with Comments */
    public static final String ALGO_ID_C14N_WITHCOMMENTS = 
        "http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments";
    
    /** Canonicalization - OPTIONAL Canonical XML (omits comments) */
    public static final String ALGO_ID_C14N_OMITCOMMENTS = 
        "http://www.w3.org/TR/2001/REC-xml-c14n-20010315";

    /** Encoding - REQUIRED base64 */
    public static final String ALGO_ID_ENCODING_BASE64 = 
        "http://www.w3.org/2000/09/xmldsig#base64";
    
    /** MGF1 with SHA-1 */
    public static final String MGF1_SHA1 =
        EncryptionConstants.EncryptionSpec11NS + "mgf1sha1";
    
    /** MGF1 with SHA-224 */
    public static final String MGF1_SHA224 =
        EncryptionConstants.EncryptionSpec11NS + "mgf1sha224";
    
    /** MGF1 with SHA-256 */
    public static final String MGF1_SHA256 =
        EncryptionConstants.EncryptionSpec11NS + "mgf1sha256";
    
    /** MGF1 with SHA-384 */
    public static final String MGF1_SHA384 =
        EncryptionConstants.EncryptionSpec11NS + "mgf1sha384";
    
    /** MGF1 with SHA-512 */
    public static final String MGF1_SHA512 =
        EncryptionConstants.EncryptionSpec11NS + "mgf1sha512";


    private EncryptionConstants() {
        // we don't allow instantiation
    }

}
