/* * Copyright (c) 2008 Apple Inc. All Rights Reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ #ifndef PADDING_H #define PADDING_H #include "byte_string.h" #include <Security/cssmtype.h> #include <security_cdsa_utilities/cssmerrors.h> /** Utility class to unify padding/hash-header handling * */ class Padding { public: /** Applies padding and hash-headers for signing */ static void apply(byte_string &data, size_t keySize, CSSM_PADDING padding = CSSM_PADDING_NONE, CSSM_ALGORITHMS hashAlg = CSSM_ALGID_NONE) throw(CssmError); /** Removes padding for decryption * Note: Securely eliminates data such that the 'leftover' bytes are not left to be read after data's destruction */ static void remove(byte_string &data, CSSM_PADDING padding = CSSM_PADDING_NONE) throw(CssmError); /** Returns boolean whether a specific padding/hash-header can be applied */ static bool canApply(CSSM_PADDING padding = CSSM_PADDING_NONE, CSSM_ALGORITHMS hashAlg = CSSM_ALGID_NONE) throw(); /** Returns boolean whether a specific padding can be removed */ static bool canRemove(CSSM_PADDING padding) throw(); }; #endif