| KRB5_AUTH_CONTEXT(3) | Library Functions Manual | KRB5_AUTH_CONTEXT(3) |
krb5_auth_con_addflags,
krb5_auth_con_free,
krb5_auth_con_genaddrs,
krb5_auth_con_generatelocalsubkey,
krb5_auth_con_getaddrs,
krb5_auth_con_getauthenticator,
krb5_auth_con_getflags,
krb5_auth_con_getkey,
krb5_auth_con_getlocalsubkey,
krb5_auth_con_getrcache,
krb5_auth_con_getremotesubkey,
krb5_auth_con_getuserkey,
krb5_auth_con_init,
krb5_auth_con_initivector,
krb5_auth_con_removeflags,
krb5_auth_con_setaddrs,
krb5_auth_con_setaddrs_from_fd,
krb5_auth_con_setflags,
krb5_auth_con_setivector,
krb5_auth_con_setkey,
krb5_auth_con_setlocalsubkey,
krb5_auth_con_setrcache,
krb5_auth_con_setremotesubkey,
krb5_auth_con_setuserkey,
krb5_auth_context,
krb5_auth_getcksumtype,
krb5_auth_getkeytype,
krb5_auth_getlocalseqnumber,
krb5_auth_getremoteseqnumber,
krb5_auth_setcksumtype,
krb5_auth_setkeytype,
krb5_auth_setlocalseqnumber,
krb5_auth_setremoteseqnumber,
krb5_free_authenticator —
manage authentication on connection level
Kerberos 5 Library (libkrb5, -lkrb5)
#include
<krb5.h>
krb5_error_code
krb5_auth_con_init(krb5_context
context, krb5_auth_context *auth_context);
void
krb5_auth_con_free(krb5_context
context, krb5_auth_context auth_context);
krb5_error_code
krb5_auth_con_setflags(krb5_context
context, krb5_auth_context auth_context,
int32_t flags);
krb5_error_code
krb5_auth_con_getflags(krb5_context
context, krb5_auth_context auth_context,
int32_t *flags);
krb5_error_code
krb5_auth_con_addflags(krb5_context
context, krb5_auth_context auth_context,
int32_t addflags, int32_t
*flags);
krb5_error_code
krb5_auth_con_removeflags(krb5_context
context, krb5_auth_context auth_context,
int32_t removelags, int32_t
*flags);
krb5_error_code
krb5_auth_con_setaddrs(krb5_context
context, krb5_auth_context auth_context,
krb5_address *local_addr, krb5_address
*remote_addr);
krb5_error_code
krb5_auth_con_getaddrs(krb5_context
context, krb5_auth_context auth_context,
krb5_address **local_addr,
krb5_address **remote_addr);
krb5_error_code
krb5_auth_con_genaddrs(krb5_context
context, krb5_auth_context auth_context,
int fd, int flags);
krb5_error_code
krb5_auth_con_setaddrs_from_fd(krb5_context
context, krb5_auth_context auth_context,
void *p_fd);
krb5_error_code
krb5_auth_con_getkey(krb5_context
context, krb5_auth_context auth_context,
krb5_keyblock **keyblock);
krb5_error_code
krb5_auth_con_getlocalsubkey(krb5_context
context, krb5_auth_context auth_context,
krb5_keyblock **keyblock);
krb5_error_code
krb5_auth_con_getremotesubkey(krb5_context
context, krb5_auth_context auth_context,
krb5_keyblock **keyblock);
krb5_error_code
krb5_auth_con_generatelocalsubkey(krb5_context
context, krb5_auth_context auth_context,
krb5_keyblock, *key");
krb5_error_code
krb5_auth_con_initivector(krb5_context
context, krb5_auth_context auth_context);
krb5_error_code
krb5_auth_con_setivector(krb5_context
context, krb5_auth_context *auth_context,
krb5_pointer ivector);
void
krb5_free_authenticator(krb5_context
context, krb5_authenticator *authenticator);
The krb5_auth_context structure holds all
context related to an authenticated connection, in a similar way to
krb5_context that holds the context for the thread
or process. 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 various
flags, addresses of client and server, port numbers, keyblocks (and
subkeys), sequence numbers, replay cache, and checksum-type.
krb5_auth_con_init()
allocates and initializes the krb5_auth_context
structure. Default values can be changed with
krb5_auth_con_setcksumtype()
and krb5_auth_con_setflags(). The
auth_context structure must be freed by
krb5_auth_con_free().
krb5_auth_con_getflags(),
krb5_auth_con_setflags(),
krb5_auth_con_addflags()
and
krb5_auth_con_removeflags()
gets and modifies the flags for a krb5_auth_context
structure. Possible flags to set are:
KRB5_AUTH_CONTEXT_DO_SEQUENCEKRB5_AUTH_CONTEXT_DO_TIMEKRB5_AUTH_CONTEXT_RET_SEQUENCE,
KRB5_AUTH_CONTEXT_RET_TIMEKRB5_AUTH_CONTEXT_CLEAR_FORWARDED_CREDkrb5_get_forwarded_creds() and
krb5_fwd_tgt_creds()
to create unencrypted ) KRB5_ENCTYPE_NULL)
credentials. This is for use with old MIT server and JAVA based servers as
they can't handle encrypted KRB-CRED. Note that
sending such KRB-CRED is clear exposes crypto keys
and tickets and is insecure, make sure the packet is encrypted in the
protocol. krb5_rd_cred(3),
krb5_rd_priv(3), krb5_rd_safe(3),
krb5_mk_priv(3) and krb5_mk_safe(3).
Setting this flag requires that parameter to be passed to these functions.
The flags
KRB5_AUTH_CONTEXT_DO_TIME also modifies the
behavior the function
krb5_get_forwarded_creds()
by removing the timestamp in the forward credential message, this have
backward compatibility problems since not all versions of the heimdal
supports timeless credentional messages. Is very useful since it always
the sender of the message to cache forward message and thus avoiding a
round trip to the KDC for each time a credential is forwarded. The same
functionality can be obtained by using address-less tickets.
krb5_auth_con_setaddrs(),
krb5_auth_con_setaddrs_from_fd() and
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.
krb5_auth_con_getaddrs() will call
krb5_free_address()
on any address that is passed in local_addr or
remote_addr.
krb5_auth_con_setaddr()
allows passing in a NULL pointer as
local_addr and remote_addr, in
that case it will just not set that address.
krb5_auth_con_setaddrs_from_fd()
fetches the addresses from a file descriptor.
krb5_auth_con_genaddrs()
fetches the address information from the given file descriptor
fd depending on the bitmap argument
flags.
Possible values on flags are:
krb5_auth_con_setkey(),
krb5_auth_con_setuserkey() and
krb5_auth_con_getkey()
gets and sets the key used for this auth context. The keyblock returned by
krb5_auth_con_getkey() should be freed with
krb5_free_keyblock().
The keyblock send into krb5_auth_con_setkey() is
copied into the krb5_auth_context, and thus no
special handling is needed. NULL is not a valid
keyblock to krb5_auth_con_setkey().
krb5_auth_con_setuserkey()
is only useful when doing user to user authentication.
krb5_auth_con_setkey() is equivalent to
krb5_auth_con_setuserkey().
krb5_auth_con_getlocalsubkey(),
krb5_auth_con_setlocalsubkey(),
krb5_auth_con_getremotesubkey()
and
krb5_auth_con_setremotesubkey()
gets and sets the keyblock for the local and remote subkey. The keyblock
returned by krb5_auth_con_getlocalsubkey() and
krb5_auth_con_getremotesubkey() must be freed with
krb5_free_keyblock().
krb5_auth_setcksumtype()
and
krb5_auth_getcksumtype()
sets and gets the checksum type that should be used for this connection.
krb5_auth_con_generatelocalsubkey()
generates a local subkey that have the same encryption type as
key.
krb5_auth_getremoteseqnumber()
krb5_auth_setremoteseqnumber(),
krb5_auth_getlocalseqnumber()
and
krb5_auth_setlocalseqnumber()
gets and sets the sequence-number for the local and remote sequence-number
counter.
krb5_auth_setkeytype()
and
krb5_auth_getkeytype()
gets and gets the keytype of the keyblock in
krb5_auth_context.
krb5_auth_con_getauthenticator()
Retrieves the authenticator that was used during mutual authentication. The
authenticator returned should be freed by calling
krb5_free_authenticator().
krb5_auth_con_getrcache()
and
krb5_auth_con_setrcache()
gets and sets the replay-cache.
krb5_auth_con_initivector()
allocates memory for and zeros the initial vector in the
auth_context keyblock.
krb5_auth_con_setivector()
sets the i_vector portion of auth_context to
ivector.
krb5_free_authenticator()
free the content of authenticator and
authenticator itself.
| May 17, 2005 | HEIMDAL |