/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2000 by Cisco Systems, Inc.  All rights reserved.
 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
 */

#ifndef	_ISCSIAUTHCLIENT_H
#define	_ISCSIAUTHCLIENT_H

/*
 * This file is the include file for for iscsiAuthClient.c
 */

#ifdef __cplusplus
extern "C" {
#endif

enum { iscsiAuthStringMaxLength = 512 };
enum { iscsiAuthStringBlockMaxLength = 1024 };
enum { iscsiAuthLargeBinaryMaxLength = 1024 };

enum { iscsiAuthRecvEndMaxCount = 10 };

enum { iscsiAuthClientSignature = 0x5984B2E3 };

enum { iscsiAuthChapResponseLength = 16 };

/*
 * Note: The ordering of these values are chosen to match
 *       the ordering of the keys as shown in the iSCSI spec.
 *       The table IscsiAuthClientKeyInfo in iscsiAuthClient.c
 *       must also match this order.
 */
enum iscsiAuthKeyType_t {
	iscsiAuthKeyTypeNone = -1,
	iscsiAuthKeyTypeFirst = 0,
	iscsiAuthKeyTypeAuthMethod = iscsiAuthKeyTypeFirst,
	iscsiAuthKeyTypeChapAlgorithm,
	iscsiAuthKeyTypeChapUsername,
	iscsiAuthKeyTypeChapResponse,
	iscsiAuthKeyTypeChapIdentifier,
	iscsiAuthKeyTypeChapChallenge,
	iscsiAuthKeyTypeMaxCount,
	iscsiAuthKeyTypeLast = iscsiAuthKeyTypeMaxCount - 1
};
typedef enum iscsiAuthKeyType_t IscsiAuthKeyType;

enum {
	/*
	 * Common options for all keys.
	 */
	iscsiAuthOptionReject = -2,
	iscsiAuthOptionNotPresent = -1,
	iscsiAuthOptionNone = 1,

	iscsiAuthMethodChap = 2,
	iscsiAuthMethodMaxCount = 2,

	iscsiAuthChapAlgorithmMd5 = 5,
	iscsiAuthChapAlgorithmMaxCount = 2
};

enum iscsiAuthNegRole_t {
	iscsiAuthNegRoleOriginator = 1,
	iscsiAuthNegRoleResponder = 2
};
typedef enum iscsiAuthNegRole_t IscsiAuthNegRole;

/*
 * Note: These values are chosen to map to the values sent
 *       in the iSCSI header.
 */
enum iscsiAuthVersion_t {
	iscsiAuthVersionDraft8 = 2,
	iscsiAuthVersionRfc = 0
};
typedef enum iscsiAuthVersion_t IscsiAuthVersion;

enum iscsiAuthStatus_t {
	iscsiAuthStatusNoError = 0,
	iscsiAuthStatusError,
	iscsiAuthStatusPass,
	iscsiAuthStatusFail,
	iscsiAuthStatusContinue,
	iscsiAuthStatusInProgress
};
typedef enum iscsiAuthStatus_t IscsiAuthStatus;

enum iscsiAuthDebugStatus_t {
	iscsiAuthDebugStatusNotSet = 0,

	iscsiAuthDebugStatusAuthPass,
	iscsiAuthDebugStatusAuthRemoteFalse,

	iscsiAuthDebugStatusAuthFail,

	iscsiAuthDebugStatusAuthMethodBad,
	iscsiAuthDebugStatusChapAlgorithmBad,
	iscsiAuthDebugStatusPasswordDecryptFailed,
	iscsiAuthDebugStatusPasswordTooShortWithNoIpSec,
	iscsiAuthDebugStatusAuthServerError,
	iscsiAuthDebugStatusAuthStatusBad,
	iscsiAuthDebugStatusAuthPassNotValid,
	iscsiAuthDebugStatusSendDuplicateSetKeyValue,
	iscsiAuthDebugStatusSendStringTooLong,
	iscsiAuthDebugStatusSendTooMuchData,

	iscsiAuthDebugStatusAuthMethodExpected,
	iscsiAuthDebugStatusChapAlgorithmExpected,
	iscsiAuthDebugStatusChapIdentifierExpected,
	iscsiAuthDebugStatusChapChallengeExpected,
	iscsiAuthDebugStatusChapResponseExpected,
	iscsiAuthDebugStatusChapUsernameExpected,

	iscsiAuthDebugStatusAuthMethodNotPresent,
	iscsiAuthDebugStatusAuthMethodReject,
	iscsiAuthDebugStatusAuthMethodNone,
	iscsiAuthDebugStatusChapAlgorithmReject,
	iscsiAuthDebugStatusChapChallengeReflected,
	iscsiAuthDebugStatusPasswordIdentical,

	iscsiAuthDebugStatusLocalPasswordNotSet,

	iscsiAuthDebugStatusChapIdentifierBad,
	iscsiAuthDebugStatusChapChallengeBad,
	iscsiAuthDebugStatusChapResponseBad,
	iscsiAuthDebugStatusUnexpectedKeyPresent,
	iscsiAuthDebugStatusTbitSetIllegal,
	iscsiAuthDebugStatusTbitSetPremature,

	iscsiAuthDebugStatusRecvMessageCountLimit,
	iscsiAuthDebugStatusRecvDuplicateSetKeyValue,
	iscsiAuthDebugStatusRecvStringTooLong,
	iscsiAuthDebugStatusRecvTooMuchData
};
typedef enum iscsiAuthDebugStatus_t IscsiAuthDebugStatus;

enum iscsiAuthNodeType_t {
	iscsiAuthNodeTypeInitiator = 1,
	iscsiAuthNodeTypeTarget = 2
};
typedef enum iscsiAuthNodeType_t IscsiAuthNodeType;

enum iscsiAuthPhase_t {
	iscsiAuthPhaseConfigure = 1,
	iscsiAuthPhaseNegotiate,		/* Negotiating */
	iscsiAuthPhaseAuthenticate,		/* Authenticating */
	iscsiAuthPhaseDone,			/* Authentication done */
	iscsiAuthPhaseError
};
typedef enum iscsiAuthPhase_t IscsiAuthPhase;

enum iscsiAuthLocalState_t {
	iscsiAuthLocalStateSendAlgorithm = 1,
	iscsiAuthLocalStateRecvAlgorithm,
	iscsiAuthLocalStateRecvChallenge,
	iscsiAuthLocalStateDone,
	iscsiAuthLocalStateError
};
typedef enum iscsiAuthLocalState_t IscsiAuthLocalState;

enum iscsiAuthRemoteState_t {
	iscsiAuthRemoteStateSendAlgorithm = 1,
	iscsiAuthRemoteStateSendChallenge,
	iscsiAuthRemoteStateRecvResponse,
	iscsiAuthRemoteStateAuthRequest,
	iscsiAuthRemoteStateDone,
	iscsiAuthRemoteStateError
};
typedef enum iscsiAuthRemoteState_t IscsiAuthRemoteState;


typedef void IscsiAuthClientCallback(void *, void *, int);


struct iscsiAuthClientGlobalStats_t {
	unsigned long requestSent;
	unsigned long responseReceived;
};
typedef struct iscsiAuthClientGlobalStats_t IscsiAuthClientGlobalStats;

struct iscsiAuthBufferDesc_t {
	unsigned int length;
	void *address;
};
typedef struct iscsiAuthBufferDesc_t IscsiAuthBufferDesc;

struct iscsiAuthKey_t {
	unsigned int present:1;
	unsigned int processed:1;
	unsigned int valueSet:1;	/* 1 if the value is set to be valid */
	char *string;
};
typedef struct iscsiAuthKey_t IscsiAuthKey;

struct iscsiAuthLargeBinaryKey_t {
	unsigned int length;
	unsigned char *largeBinary;
	};
typedef struct iscsiAuthLargeBinaryKey_t IscsiAuthLargeBinaryKey;

struct iscsiAuthKeyBlock_t {
	unsigned int transitBit:1;	/* To transit: TRUE or FALSE */
	unsigned int duplicateSet:1;	/* Set the value more than once */
	unsigned int stringTooLong:1;	/* Key value too long */
	unsigned int tooMuchData:1;	/* The keypair data blk overflows */
	unsigned int blockLength:16;	/* The length of the keypair data blk */
	char *stringBlock;
	IscsiAuthKey key[iscsiAuthKeyTypeMaxCount];
};
typedef struct iscsiAuthKeyBlock_t IscsiAuthKeyBlock;

struct iscsiAuthStringBlock_t {
	char stringBlock[iscsiAuthStringBlockMaxLength];
};
typedef struct iscsiAuthStringBlock_t IscsiAuthStringBlock;

struct iscsiAuthLargeBinary_t {
	unsigned char largeBinary[iscsiAuthLargeBinaryMaxLength];
};
typedef struct iscsiAuthLargeBinary_t IscsiAuthLargeBinary;

struct iscsiAuthClient_t {
	unsigned long signature;

	void *glueHandle;
	struct iscsiAuthClient_t *next;
	unsigned int authRequestId;

	IscsiAuthNodeType nodeType;
	unsigned int authMethodCount;
	int authMethodList[iscsiAuthMethodMaxCount];
	IscsiAuthNegRole authMethodNegRole;
	unsigned int chapAlgorithmCount;
	int chapAlgorithmList[iscsiAuthChapAlgorithmMaxCount];

	/*
	 * To indicate if remote authentication is enabled (0 = no 1 = yes)
	 * For the case of initiator, remote authentication enabled means
	 * enabling target authentication.
	 */
	int authRemote;

	char username[iscsiAuthStringMaxLength];
	int passwordPresent;
	unsigned int passwordLength;
	unsigned char passwordData[iscsiAuthStringMaxLength];
	char methodListName[iscsiAuthStringMaxLength];
	IscsiAuthVersion version;
	unsigned int chapChallengeLength;
	int ipSec;
	int base64;

	unsigned int authMethodValidCount;
	int authMethodValidList[iscsiAuthMethodMaxCount];
	int authMethodValidNegRole;
	const char *rejectOptionName;
	const char *noneOptionName;

	int recvInProgressFlag;
	int recvEndCount;
	IscsiAuthClientCallback *callback;
	void *userHandle;
	void *messageHandle;

	IscsiAuthPhase phase;
	IscsiAuthLocalState localState;
	IscsiAuthRemoteState remoteState;
	IscsiAuthStatus remoteAuthStatus;
	IscsiAuthDebugStatus debugStatus;
	int negotiatedAuthMethod;
	int negotiatedChapAlgorithm;
	int authResponseFlag;
	int authServerErrorFlag;
	int transitBitSentFlag;

	unsigned int sendChapIdentifier;
	IscsiAuthLargeBinaryKey sendChapChallenge;
	char chapUsername[iscsiAuthStringMaxLength];

	int recvChapChallengeStatus;
	IscsiAuthLargeBinaryKey recvChapChallenge;

	char scratchKeyValue[iscsiAuthStringMaxLength];

	IscsiAuthKeyBlock recvKeyBlock;		/* Received keypair data */
	IscsiAuthKeyBlock sendKeyBlock;		/* Keypair data to be sent */
};
typedef struct iscsiAuthClient_t IscsiAuthClient;


#ifdef __cplusplus
}
#endif
#include <iscsiAuthClientGlue.h>
#ifdef __cplusplus
extern "C" {
#endif


extern IscsiAuthClientGlobalStats iscsiAuthClientGlobalStats;


extern int iscsiAuthClientInit(int, int, IscsiAuthBufferDesc *);
extern int iscsiAuthClientFinish(IscsiAuthClient *);

extern int iscsiAuthClientRecvBegin(IscsiAuthClient *);
extern int iscsiAuthClientRecvEnd(IscsiAuthClient *,
    IscsiAuthClientCallback *, void *, void *);

extern const char *iscsiAuthClientGetKeyName(int);
extern int iscsiAuthClientGetNextKeyType(int *);
extern int iscsiAuthClientKeyNameToKeyType(const char *);
extern int iscsiAuthClientRecvKeyValue(IscsiAuthClient *, int, const char *);
extern int iscsiAuthClientSendKeyValue(IscsiAuthClient *, int, int *, char *,
    unsigned int);
extern int iscsiAuthClientRecvTransitBit(IscsiAuthClient *, int);
extern int iscsiAuthClientSendTransitBit(IscsiAuthClient *, int *);

extern int iscsiAuthClientSetAuthMethodList(IscsiAuthClient *, unsigned int,
    const int *);
extern int iscsiAuthClientSetAuthMethodNegRole(IscsiAuthClient *, int);
extern int iscsiAuthClientSetChapAlgorithmList(IscsiAuthClient *, unsigned int,
    const int *);
extern int iscsiAuthClientSetUsername(IscsiAuthClient *, const char *);
extern int iscsiAuthClientSetPassword(IscsiAuthClient *, const unsigned char *,
    unsigned int);
extern int iscsiAuthClientSetAuthRemote(IscsiAuthClient *, int);
extern int iscsiAuthClientSetGlueHandle(IscsiAuthClient *, void *);
extern int iscsiAuthClientSetMethodListName(IscsiAuthClient *, const char *);
extern int iscsiAuthClientSetIpSec(IscsiAuthClient *, int);
extern int iscsiAuthClientSetBase64(IscsiAuthClient *, int);
extern int iscsiAuthClientSetChapChallengeLength(IscsiAuthClient *,
    unsigned int);
extern int iscsiAuthClientSetVersion(IscsiAuthClient *, int);
extern int iscsiAuthClientCheckPasswordNeeded(IscsiAuthClient *, int *);

extern int iscsiAuthClientGetAuthPhase(IscsiAuthClient *, int *);
extern int iscsiAuthClientGetAuthStatus(IscsiAuthClient *, int *);
extern int iscsiAuthClientAuthStatusPass(int);
extern int iscsiAuthClientGetAuthMethod(IscsiAuthClient *, int *);
extern int iscsiAuthClientGetChapAlgorithm(IscsiAuthClient *, int *);
extern int iscsiAuthClientGetChapUsername(IscsiAuthClient *, char *,
    unsigned int);

extern int iscsiAuthClientSendStatusCode(IscsiAuthClient *, int *);
extern int iscsiAuthClientGetDebugStatus(IscsiAuthClient *, int *);
extern const char *iscsiAuthClientDebugStatusToText(int);

/*
 * The following is called by platform dependent code.
 */
extern void iscsiAuthClientAuthResponse(IscsiAuthClient *, int);

/*
 * The following routines are considered platform dependent,
 * and need to be implemented for use by iscsiAuthClient.c.
 */

extern int iscsiAuthClientChapAuthRequest(IscsiAuthClient *, char *,
    unsigned int,
    unsigned char *, unsigned int, unsigned char *, unsigned int);
extern void iscsiAuthClientChapAuthCancel(IscsiAuthClient *);

extern int iscsiAuthClientTextToNumber(const char *, unsigned long *);
extern void iscsiAuthClientNumberToText(unsigned long, char *, unsigned int);

extern void iscsiAuthRandomSetData(unsigned char *, unsigned int);
extern void iscsiAuthMd5Init(IscsiAuthMd5Context *);
extern void iscsiAuthMd5Update(IscsiAuthMd5Context *, unsigned char *,
    unsigned int);
extern void iscsiAuthMd5Final(unsigned char *, IscsiAuthMd5Context *);

extern int iscsiAuthClientData(unsigned char *, unsigned int *, unsigned char *,
    unsigned int);

#ifdef __cplusplus
}
#endif

#endif	/* _ISCSIAUTHCLIENT_H */