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View File Name : keytools.h

/*
 * keytools.h
 */

#ifndef _KEYTOOLS_H
#define _KEYTOOLS_H

#ifdef __cplusplus
extern          "C" {
#endif


#define USM_LENGTH_EXPANDED_PASSPHRASE	(1024 * 1024)   /* 1Meg. */

#define USM_LENGTH_KU_HASHBLOCK		64      /* In bytes. */

#define USM_LENGTH_P_MIN		8       /* In characters. */
    /*
     * Recommended practice given in <draft-ietf-snmpv3-usm-v2-02.txt>,
     * * Section 11.2 "Defining Users".  Move into cmdline app argument
     * * parsing, and out of the internal routine?  XXX
     */

    /*
     * Prototypes.h
     */
    NETSNMP_IMPORT
    int             generate_Ku(const oid * hashtype, u_int hashtype_len,
                                const u_char * P, size_t pplen,
                                u_char * Ku, size_t * kulen);

    NETSNMP_IMPORT
    int             generate_kul(const oid * hashtype, u_int hashtype_len,
                                 const u_char * engineID, size_t engineID_len,
                                 const u_char * Ku, size_t ku_len,
                                 u_char * Kul, size_t * kul_len);

    NETSNMP_IMPORT
    int             encode_keychange(const oid * hashtype,
                                     u_int hashtype_len, u_char * oldkey,
                                     size_t oldkey_len, u_char * newkey,
                                     size_t newkey_len, u_char * kcstring,
                                     size_t * kcstring_len);

    NETSNMP_IMPORT
    int             decode_keychange(const oid * hashtype,
                                     u_int hashtype_len, u_char * oldkey,
                                     size_t oldkey_len, u_char * kcstring,
                                     size_t kcstring_len, u_char * newkey,
                                     size_t * newkey_len);


    /*
     * All functions devolve to the following block if we can't do cryptography
     */
#define	_KEYTOOLS_NOT_AVAILABLE			\
{						\
	return SNMPERR_KT_NOT_AVAILABLE;	\
}

#ifdef __cplusplus
}
#endif
#endif                          /* _KEYTOOLS_H */