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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Netscape security libraries.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1994-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
/* $Id: hasht.h,v 1.8 2010/08/18 05:54:57 emaldona%redhat.com Exp $ */

#ifndef _HASHT_H_
#define _HASHT_H_

/* Opaque objects */
typedef struct SECHashObjectStr SECHashObject;
typedef struct HASHContextStr HASHContext;

/*
 * The hash functions the security library supports
 * NOTE the order must match the definition of SECHashObjects[]!
 */
typedef enum {
    HASH_AlgNULL   = 0,
    HASH_AlgMD2    = 1,
    HASH_AlgMD5    = 2,
    HASH_AlgSHA1   = 3,
    HASH_AlgSHA256 = 4,
    HASH_AlgSHA384 = 5,
    HASH_AlgSHA512 = 6,
    HASH_AlgSHA224 = 7,
    HASH_AlgTOTAL
} HASH_HashType;

/*
 * Number of bytes each hash algorithm produces
 */
#define MD2_LENGTH	16
#define MD5_LENGTH	16
#define SHA1_LENGTH	20
#define SHA224_LENGTH 	28
#define SHA256_LENGTH 	32
#define SHA384_LENGTH 	48
#define SHA512_LENGTH 	64
#define HASH_LENGTH_MAX SHA512_LENGTH

/*
 * Structure to hold hash computation info and routines
 */
struct SECHashObjectStr {
    unsigned int length;  /* hash output length (in bytes) */
    void * (*create)(void);
    void * (*clone)(void *);
    void (*destroy)(void *, PRBool);
    void (*begin)(void *);
    void (*update)(void *, const unsigned char *, unsigned int);
    void (*end)(void *, unsigned char *, unsigned int *, unsigned int);
    unsigned int blocklength;  /* hash input block size (in bytes) */
    HASH_HashType type;
};

struct HASHContextStr {
    const struct SECHashObjectStr *hashobj;
    void *hash_context;
};

/* This symbol is NOT exported from the NSS DLL.  Code that needs a 
 * pointer to one of the SECHashObjects should call HASH_GetHashObject()
 * instead. See "sechash.h".
 */
extern const SECHashObject SECHashObjects[];

/* Only those functions below the PKCS #11 line should use SECRawHashObjects.
 * This symbol is not exported from the NSS DLL.
 */
extern const SECHashObject SECRawHashObjects[];

#endif /* _HASHT_H_ */