/* * Copyright (c) 2010 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 _CC_DH_H_ #define _CC_DH_H_ #include <stddef.h> #if defined(_MSC_VER) #include <availability.h> #else #include <os/availability.h> #endif #ifdef __cplusplus extern "C" { #endif typedef struct CCDHRef_s *CCDHRef; typedef struct CCDHParameters_s *CCDHParameters; // 1024 bit DL group extern const CCDHParameters kCCDHRFC2409Group2 API_AVAILABLE(macos(10.8), ios(5.0)); // 1536 bit DL group extern const CCDHParameters kCCDHRFC3526Group5 API_AVAILABLE(macos(10.8), ios(5.0)); /*! @function CCDHCreate @abstract Creates a Diffie-Hellman context. @param dhParameter The Diffie-Hellman Group to use (provides p and g). The only appropriate values are kCCDHGenerator2 or kCCDHGenerator5, defined above. @result If unable to allocate memory this returns NULL. */ CCDHRef CCDHCreate(CCDHParameters dhParameter) API_AVAILABLE(macos(10.8), ios(5.0)); /*! @function CCDHRelease @abstract Releases a Diffie-Hellman context. @param ref The Diffie-Hellman context to clear and deallocate. */ void CCDHRelease(CCDHRef ref) API_AVAILABLE(macos(10.8), ios(5.0)); /*! @function CCDHGenerateKey @abstract Generate the public key for use in a Diffie-Hellman handshake. This value is returned as a byte string. @param ref The Diffie-Hellman context. @result returns -1 on failure. */ int CCDHGenerateKey(CCDHRef ref, void *output, size_t *outputLength) API_AVAILABLE(macos(10.8), ios(5.0)); /*! @function CCDHComputeKey @abstract Compute the shared Diffie-Hellman key using the peer's public key. @param sharedKey Shared key computed from the peer public key, p, g, and the private key. @param peerPubKey Public key received from the peer. @param peerPubKeyLen Length of peer public key. @param ref The Diffie-Hellman context to clear and deallocate. @returns length of the shared key. */ int CCDHComputeKey(unsigned char *sharedKey, size_t *sharedKeyLen, const void *peerPubKey, size_t peerPubKeyLen, CCDHRef ref) API_AVAILABLE(macos(10.8), ios(5.0)); CCDHParameters CCDHParametersCreateFromData(const void *p, size_t pLen, const void *g, size_t gLen, size_t l) API_AVAILABLE(macos(10.8), ios(5.0)); CCDHParameters CCDHParametersCreateFromPKCS3(const void *data, size_t len) API_AVAILABLE(macos(10.8), ios(5.0)); size_t CCDHParametersPKCS3EncodeLength(CCDHParameters parms) API_AVAILABLE(macos(10.8), ios(5.0)); size_t CCDHParametersPKCS3Encode(CCDHParameters parms, void *data, size_t dataAvailable) API_AVAILABLE(macos(10.8), ios(5.0)); void CCDHParametersRelease(CCDHParameters parameters) API_AVAILABLE(macos(10.8), ios(5.0)); #ifdef __cplusplus } #endif #endif /* _CC_DH_H_ */