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-.\" Copyright (c) 2001 Kungliga Tekniska Högskolan
-.\" $Id: krb5_auth_context.3,v 1.5 2002/09/02 12:42:00 joda Exp $
-.Dd January 21, 2001
-.Dt KRB5_AUTH_CONTEXT 3
-.Os HEIMDAL
-.Sh NAME
-.Nm krb5_auth_context ,
-.Nm krb5_auth_con_init ,
-.Nm krb5_auth_con_free ,
-.Nm krb5_auth_con_setflags ,
-.Nm krb5_auth_con_getflags ,
-.Nm krb5_auth_con_setaddrs ,
-.Nm krb5_auth_con_setaddrs_from_fd ,
-.Nm krb5_auth_con_getaddrs ,
-.Nm krb5_auth_con_genaddrs ,
-.Nm krb5_auth_con_getkey ,
-.Nm krb5_auth_con_setkey ,
-.Nm krb5_auth_con_getuserkey ,
-.Nm krb5_auth_con_setuserkey ,
-.Nm krb5_auth_con_getlocalsubkey ,
-.Nm krb5_auth_con_setlocalsubkey ,
-.Nm krb5_auth_con_getremotesubkey ,
-.Nm krb5_auth_con_setremotesubkey ,
-.Nm krb5_auth_setcksumtype ,
-.Nm krb5_auth_getcksumtype ,
-.Nm krb5_auth_setkeytype ,
-.Nm krb5_auth_getkeytype ,
-.Nm krb5_auth_getlocalseqnumber ,
-.Nm krb5_auth_setlocalseqnumber ,
-.Nm krb5_auth_getremoteseqnumber ,
-.Nm krb5_auth_setremoteseqnumber ,
-.Nm krb5_auth_getauthenticator ,
-.Nm krb5_auth_con_getrcache ,
-.Nm krb5_auth_con_setrcache ,
-.Nm krb5_auth_con_initivector ,
-.Nm krb5_auth_con_setivector
-.Nd manage authentication on connection level
-.Sh LIBRARY
-Kerberos 5 Library (libkrb5, -lkrb5)
-.Sh SYNOPSIS
-.Fd #include <krb5.h>
-.Ft krb5_error_code
-.Fo krb5_auth_con_init
-.Fa "krb5_context context"
-.Fa "krb5_auth_context *auth_context"
-.Fc
-.Ft void
-.Fo krb5_auth_con_free
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_setflags
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fa "int32_t flags"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_getflags
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fa "int32_t *flags"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_setaddrs
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fa "krb5_address *local_addr"
-.Fa "krb5_address *remote_addr"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_getaddrs
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fa "krb5_address **local_addr"
-.Fa "krb5_address **remote_addr"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_genaddrs
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fa "int fd"
-.Fa "int flags"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_setaddrs_from_fd
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fa "void *p_fd"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_getkey
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fa "krb5_keyblock **keyblock"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_getlocalsubkey
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fa "krb5_keyblock **keyblock"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_getremotesubkey
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fa "krb5_keyblock **keyblock"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_initivector
-.Fa "krb5_context context"
-.Fa "krb5_auth_context auth_context"
-.Fc
-.Ft krb5_error_code
-.Fo krb5_auth_con_setivector
-.Fa "krb5_context context"
-.Fa "krb5_auth_context *auth_context"
-.Fa "krb5_pointer ivector"
-.Fc
-.Sh DESCRIPTION
-The
-.Nm krb5_auth_context
-structure holds all context related to an authenticated connection, in
-a similar way to
-.Nm krb5_context
-that holds the context for the thread or process.
-.Nm krb5_auth_context
-is used by various functions that are directly related to
-authentication between the server/client. Example of data that this
-structure contains are varius flags, addresses of client and server,
-port numbers, keyblocks (and subkeys), sequence numbers, replay cache,
-and checksum-type.
-.Pp
-.Fn krb5_auth_con_init
-allocates and initilizes the
-.Nm krb5_auth_context
-structure. Default values can be changed with
-.Fn krb5_auth_con_setcksumtype
-and
-.Fn krb5_auth_con_setflags .
-The
-.Nm auth_context
-structure must be freed by
-.Fn krb5_auth_con_free .
-.Pp
-.Fn krb5_auth_con_getflags
-and
-.Fn krb5_auth_con_setflags
-gets and modifies the flags for a
-.Nm krb5_auth_context
-structure. Possible flags to set are:
-.Bl -tag -width Ds
-.It Dv KRB5_AUTH_CONTEXT_DO_TIME
-check timestamp on incoming packets.
-.\".It Dv KRB5_AUTH_CONTEXT_RET_TIME
-.It Dv KRB5_AUTH_CONTEXT_DO_SEQUENCE
-Generate and check sequence-number on each packet.
-.\".It Dv KRB5_AUTH_CONTEXT_RET_SEQUENCE
-.\".It Dv KRB5_AUTH_CONTEXT_PERMIT_ALL
-.El
-.Pp
-.Fn krb5_auth_con_setaddrs ,
-.Fn krb5_auth_con_setaddrs_from_fd
-and
-.Fn krb5_auth_con_getaddrs
-gets and sets the addresses that are checked when a packet is received.
-It is mandatory to set an address for the remote
-host. If the local address is not set, it iss deduced from the underlaying
-operating system.
-.Fn krb5_auth_con_getaddrs
-will call
-.Fn krb5_free_address
-on any address that is passed in
-.Fa local_addr
-or
-.Fa remote_addr .
-.Fn krb5_auth_con_setaddr
-allows passing in a
-.Dv NULL
-pointer as
-.Fa local_addr
-and
-.Fa remote_addr ,
-in that case it will just not set that address.
-.Pp
-.Fn krb5_auth_con_setaddrs_from_fd
-fetches the addresses from a file descriptor.
-.Pp
-.Fn krb5_auth_con_genaddrs
-fetches the address information from the given file descriptor
-.Fa fd
-depending on the bitmap argument
-.Fa flags .
-.Pp
-Possible values on
-.Fa flags
-are:
-.Bl -tag -width Ds
-.It Va KRB5_AUTH_CONTEXT_GENERATE_LOCAL_ADDR
-fetches the local address from
-.Fa fd .
-.It Va KRB5_AUTH_CONTEXT_GENERATE_REMOTE_ADDR
-fetches the remote address from
-.Fa fd .
-.El
-.Pp
-.Fn krb5_auth_con_setkey ,
-.Fn krb5_auth_con_setuserkey
-and
-.Fn krb5_auth_con_getkey
-gets and sets the key used for this auth context. The keyblock returned by
-.Fn krb5_auth_con_getkey
-should be freed with
-.Fn krb5_free_keyblock .
-The keyblock send into
-.Fn krb5_auth_con_setkey
-is copied into the
-.Nm krb5_auth_context ,
-and thus no special handling is needed.
-.Dv NULL
-is not a valid keyblock to
-.Fn krb5_auth_con_setkey .
-.Pp
-.Fn krb5_auth_con_setuserkey
-is only useful when doing user to user authentication.
-.Fn krb5_auth_con_setkey
-is equivalent to
-.Fn krb5_auth_con_setuserkey .
-.Pp
-.Fn krb5_auth_con_getlocalsubkey ,
-.Fn krb5_auth_con_setlocalsubkey ,
-.Fn krb5_auth_con_getremotesubkey
-and
-.Fn krb5_auth_con_setremotesubkey
-gets and sets the keyblock for the local and remote subkey. The keyblock returned by
-.Fn krb5_auth_con_getlocalsubkey
-and
-.Fn krb5_auth_con_getremotesubkey
-must be freed with
-.Fn krb5_free_keyblock .
-.Pp
-.Fn krb5_auth_setcksumtype
-and
-.Fn krb5_auth_getcksumtype
-sets and gets the checksum type that should be used for this
-connection.
-.Pp
-.Fn krb5_auth_getremoteseqnumber
-.Fn krb5_auth_setremoteseqnumber ,
-.Fn krb5_auth_getlocalseqnumber
-and
-.Fn krb5_auth_setlocalseqnumber
-gets and sets the sequence-number for the local and remote
-sequence-number counter.
-.Pp
-.Fn krb5_auth_setkeytype
-and
-.Fn krb5_auth_getkeytype
-gets and gets the keytype of the keyblock in
-.Nm krb5_auth_context .
-.Pp
-.Fn krb5_auth_getauthenticator
-Retrieves the authenticator that was used during mutual
-authentication. The
-.Dv authenticator
-returned should be freed by calling
-.Fn krb5_free_authenticator .
-.Pp
-.Fn krb5_auth_con_getrcache
-and
-.Fn krb5_auth_con_setrcache
-gets and sets the replay-cache.
-.Pp
-.Fn krb5_auth_con_initivector
-allocates memory for and zeros the initial vector in the
-.Fa auth_context
-keyblock.
-.Pp
-.Fn krb5_auth_con_setivector
-sets the i_vector portion of
-.Fa auth_context
-to
-.Fa ivector .
-.Sh SEE ALSO
-.Xr krb5_context 3 ,
-.Xr kerberos 8