25ad02d691
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@9830 ec53bebd-3082-4978-b11e-865c3cabbd6b
285 lines
7.0 KiB
Groff
285 lines
7.0 KiB
Groff
.\" Copyright (c) 2001 Kungliga Tekniska Högskolan
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.\" $Id$
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.Dd Jan 21, 2001
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.Dt KRB5_AUTH_CONTEXT 3
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.Os HEIMDAL
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.Sh NAME
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.Nm krb5_auth_context ,
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.Nm krb5_auth_con_init ,
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.Nm krb5_auth_con_free ,
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.Nm krb5_auth_con_setflags ,
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.Nm krb5_auth_con_getflags ,
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.Nm krb5_auth_con_setaddrs ,
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.Nm krb5_auth_con_setaddrs_from_fd ,
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.Nm krb5_auth_con_getaddrs ,
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.Nm krb5_auth_con_genaddrs ,
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.Nm krb5_auth_con_getkey ,
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.Nm krb5_auth_con_setkey ,
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.Nm krb5_auth_con_getuserkey ,
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.Nm krb5_auth_con_setuserkey ,
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.Nm krb5_auth_con_getlocalsubkey ,
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.Nm krb5_auth_con_setlocalsubkey ,
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.Nm krb5_auth_con_getremotesubkey ,
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.Nm krb5_auth_con_setremotesubkey ,
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.Nm krb5_auth_setcksumtype ,
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.Nm krb5_auth_getcksumtype ,
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.Nm krb5_auth_setkeytype ,
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.Nm krb5_auth_getkeytype ,
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.Nm krb5_auth_getlocalseqnumber ,
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.Nm krb5_auth_setlocalseqnumber ,
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.Nm krb5_auth_getremoteseqnumber ,
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.Nm krb5_auth_setremoteseqnumber ,
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.Nm krb5_auth_getauthenticator ,
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.Nm krb5_auth_con_getrcache ,
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.Nm krb5_auth_con_setrcache ,
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.Nm krb5_auth_con_initivector ,
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.Nm krb5_auth_con_setivector
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.Nd manage authetication on connection level
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.Sh SYNOPSIS
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.Fd #include <krb5.h>
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.Ft krb5_error_code
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.Fo krb5_auth_con_init
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.Fa "krb5_context context"
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.Fa "krb5_auth_context *auth_context"
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.Fc
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.Ft void
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.Fo krb5_auth_con_free
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_setflags
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fa "int32_t flags"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_getflags
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fa "int32_t *flags"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_setaddrs
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fa "krb5_address *local_addr"
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.Fa "krb5_address *remote_addr"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_getaddrs
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fa "krb5_address **local_addr"
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.Fa "krb5_address **remote_addr"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_genaddrs
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fa "int fd"
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.Fa "int flags"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_setaddrs_from_fd
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fa "void *p_fd"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_getkey
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fa "krb5_keyblock **keyblock"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_getlocalsubkey
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fa "krb5_keyblock **keyblock"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_getremotesubkey
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fa "krb5_keyblock **keyblock"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_initivector
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.Fa "krb5_context context"
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.Fa "krb5_auth_context auth_context"
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.Fc
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.Ft krb5_error_code
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.Fo krb5_auth_con_setivector
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.Fa "krb5_context context"
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.Fa "krb5_auth_context *auth_context"
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.Fa "krb5_pointer ivector"
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.Fc
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.Sh DESCRIPTION
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The
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.Nm krb5_auth_context
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structure holds all context related to an authenticated connection, in
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a similar way to
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.Nm krb5_context
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that holds the context for the thread or process.
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.Nm krb5_auth_context
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is used by various functions that are directly related to
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authentication between the server/client. Example of data that this
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structure contains are varius flags, addresses of client and server,
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port numbers, keyblocks (and subkeys), sequence numbers, replay cache,
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and checksum-type.
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.Pp
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.Fn krb5_auth_con_init
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allocates and initilizes the
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.Nm krb5_auth_context
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structure. Default values can be changed with
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.Fn krb5_auth_con_setcksumtype
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and
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.Fn krb5_auth_con_setflags .
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The
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.Nm auth_context
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structure must be freed by
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.Fn krb5_auth_con_free .
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.Pp
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.Fn krb5_auth_con_getflags
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and
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.Fn krb5_auth_con_setflags
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gets and modifies the flags for a
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.Nm krb5_auth_context
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structure. Possible flags to set are:
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.Bl -tag -width Ds
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.It Dv KRB5_AUTH_CONTEXT_DO_TIME
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check timestamp on incoming packets.
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.\".It Dv KRB5_AUTH_CONTEXT_RET_TIME
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.It Dv KRB5_AUTH_CONTEXT_DO_SEQUENCE
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Generate and check sequence-number on each packet.
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.\".It Dv KRB5_AUTH_CONTEXT_RET_SEQUENCE
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.\".It Dv KRB5_AUTH_CONTEXT_PERMIT_ALL
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.El
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.Pp
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.Fn krb5_auth_con_setaddrs ,
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.Fn krb5_auth_con_setaddrs_from_fd
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and
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.Fn krb5_auth_con_getaddrs
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gets and sets the addresses that are checked when a packet is received.
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It is mandatory to set an address for the remote
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host. If the local address is not set, it iss deduced from the underlaying
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operating system.
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.Fn krb5_auth_con_getaddrs
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will call
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.Fn krb5_free_address
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on any address that is passed in
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.Fa local_addr
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or
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.Fa remote_addr .
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.Fn krb5_auth_con_setaddr
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allows passing in a
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.Dv NULL
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pointer as
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.Fa local_addr
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and
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.Fa remote_addr ,
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in that case it will just not set that address.
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.Pp
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.Fn krb5_auth_con_setaddrs_from_fd
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fetches the addresses from a file descriptor.
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.Pp
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.Fn krb5_auth_con_genaddrs
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fetches the address information from the given file descriptor
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.Fa fd
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depending on the bitmap argument
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.Fa flags .
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.Pp
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Possible values on
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.Fa flags
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are:
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.Bl -tag -width Ds
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.It Va KRB5_AUTH_CONTEXT_GENERATE_LOCAL_ADDR
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fetches the local address from
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.Fa fd .
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.It Va KRB5_AUTH_CONTEXT_GENERATE_REMOTE_ADDR
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fetches the remote address from
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.Fa fd .
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.El
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.Pp
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.Fn krb5_auth_con_setkey ,
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.Fn krb5_auth_con_setuserkey
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and
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.Fn krb5_auth_con_getkey
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gets and sets the key used for this auth context. The keyblock returned by
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.Fn krb5_auth_con_getkey
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should be freed with
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.Fn krb5_free_keyblock .
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The keyblock send into
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.Fn krb5_auth_con_setkey
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is copied into the
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.Nm krb5_auth_context ,
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and thus no special handling is needed.
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.Dv NULL
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is not a valid keyblock to
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.Fn krb5_auth_con_setkey .
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.Pp
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.Fn krb5_auth_con_setuserkey
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is only useful when doing user to user authentication.
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.Fn krb5_auth_con_setkey
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is equivalent to
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.Fn krb5_auth_con_setuserkey .
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.Pp
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.Fn krb5_auth_con_getlocalsubkey ,
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.Fn krb5_auth_con_setlocalsubkey ,
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.Fn krb5_auth_con_getremotesubkey
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and
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.Fn krb5_auth_con_setremotesubkey
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gets and sets the keyblock for the local and remote subkey. The keyblock returned by
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.Fn krb5_auth_con_getlocalsubkey
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and
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.Fn krb5_auth_con_getremotesubkey
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must be freed with
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.Fn krb5_free_keyblock .
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.Pp
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.Fn krb5_auth_setcksumtype
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and
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.Fn krb5_auth_getcksumtype
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sets and gets the checksum type that should be used for this
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connection.
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.Pp
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.Fn krb5_auth_getremoteseqnumber
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.Fn krb5_auth_setremoteseqnumber ,
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.Fn krb5_auth_getlocalseqnumber
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and
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.Fn krb5_auth_setlocalseqnumber
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gets and sets the sequence-number for the local and remote
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sequence-number counter.
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.Pp
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.Fn krb5_auth_setkeytype
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and
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.Fn krb5_auth_getkeytype
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gets and gets the keytype of the keyblock in
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.Nm krb5_auth_context .
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.Pp
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.Fn krb5_auth_getauthenticator
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Retrieves the authenticator that was used during mutual
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authentication. The
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.Dv authenticator
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returned should be freed by calling
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.Fn krb5_free_authenticator .
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.Pp
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.Fn krb5_auth_con_getrcache
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and
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.Fn krb5_auth_con_setrcache
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gets and sets the replay-cache.
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.Pp
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.Fn krb5_auth_con_initivector
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allocates memory for and zeros the initial vector in the
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.Fa auth_context
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keyblock.
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.Pp
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.Fn krb5_auth_con_setivector
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sets the i_vector portion of
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.Fa auth_context
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to
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.Fa ivector .
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.Sh SEE ALSO
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.Xr krb5_context 3 ,
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.Xr kerberos 8
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