/**
* shishi_authenticator_to_file:
* @handle: shishi handle as allocated by shishi_init().
* @authenticator: Authenticator to save.
* @filetype: input variable specifying type of file to be written,
* see Shishi_filetype.
* @filename: input variable with filename to write to.
*
* Write Authenticator to file in specified TYPE. The file will be
* truncated if it exists.
*
* Return value: Returns SHISHI_OK iff successful.
**/
int
shishi_authenticator_to_file (Shishi * handle, Shishi_asn1 authenticator,
int filetype, const char *filename)
{
FILE *fh;
int res;
if (VERBOSE (handle))
printf (_("Writing Authenticator to %s...\n"), filename);
fh = fopen (filename, "w");
if (fh == NULL)
return SHISHI_FOPEN_ERROR;
if (VERBOSE (handle))
printf (_("Writing Authenticator in %s format...\n"),
filetype == SHISHI_FILETYPE_TEXT ? "TEXT" : "DER");
if (filetype == SHISHI_FILETYPE_TEXT)
res = shishi_authenticator_print (handle, fh, authenticator);
else
res = shishi_authenticator_save (handle, fh, authenticator);
if (res != SHISHI_OK)
return res;
res = fclose (fh);
if (res != 0)
return SHISHI_IO_ERROR;
if (VERBOSE (handle))
printf (_("Writing Authenticator to %s...done\n"), filename);
return SHISHI_OK;
}
/* shishi authentication */
int
auth (Shishi * h, int verbose, const char *cname, const char *sname, int sock,
char *cmd, char *port, Shishi_key ** enckey, Shishi_key * deckey)
{
Shishi_ap *ap;
Shishi_tkt *tkt;
Shishi_tkts_hint hint;
int rc;
char *out;
int outlen;
int krb5len, msglen;
char auth;
/* KERBEROS 5 SENDAUTH MESSAGE */
char krb5sendauth[] = "KRB5_SENDAUTH_V1.0";
/* PROTOCOL VERSION */
char krb5sendclient[] = "KCMDV0.2";
/* to store error msg sent by server */
char errormsg[101];
char cksumdata[101];
/* size of KRB5 auth message */
krb5len = strlen (krb5sendauth) + 1;
msglen = htonl (krb5len);
safewrite (sock, &msglen, sizeof (int));
/* KRB5 authentication message */
safewrite (sock, krb5sendauth, krb5len);
/* size of client message */
krb5len = strlen (krb5sendclient) + 1;
msglen = htonl (krb5len);
safewrite (sock, &msglen, sizeof (int));
/* KRB5 client message */
safewrite (sock, krb5sendclient, krb5len);
/* get answer from server 0 = ok, 1 = error with message */
read (sock, &auth, 1);
if (auth)
{
read (sock, errormsg, 100);
errormsg[100] = '\0';
printf ("Error during server authentication : %s\n", errormsg);
return 1;
}
if (verbose)
{
printf ("Client: %s\n", cname);
printf ("Server: %s\n", sname);
}
/* Get a ticket for the server. */
memset (&hint, 0, sizeof (hint));
hint.client = (char *) cname;
hint.server = (char *) sname;
tkt = shishi_tkts_get (shishi_tkts_default (h), &hint);
if (!tkt)
{
printf ("cannot find ticket for \"%s\"\n", sname);
return 1;
}
if (verbose)
shishi_tkt_pretty_print (tkt, stderr);
/* Create Authentication context */
rc = shishi_ap_tktoptions (h, &ap, tkt, SHISHI_APOPTIONS_MUTUAL_REQUIRED);
if (rc != SHISHI_OK)
{
printf ("cannot create authentication context\n");
return 1;
}
/* checksum = port: terminal name */
snprintf (cksumdata, 100, "%s:%s%s", port, cmd, cname);
/* add checksum to authenticator */
shishi_ap_authenticator_cksumdata_set (ap, cksumdata, strlen (cksumdata));
/* To be compatible with MIT rlogind */
shishi_ap_authenticator_cksumtype_set (ap, SHISHI_RSA_MD5);
/* create der encoded AP-REQ */
rc = shishi_ap_req_der (ap, &out, &outlen);
if (rc != SHISHI_OK)
{
printf ("cannot build authentication request: %s\n",
shishi_strerror (rc));
return 1;
}
if (verbose)
shishi_authenticator_print (h, stderr, shishi_ap_authenticator (ap));
/* extract subkey if present from ap exchange for secure connection */
shishi_authenticator_get_subkey (h, shishi_ap_authenticator (ap), enckey);
/* send size of AP-REQ to the server */
msglen = htonl (outlen);
safewrite (sock, (char *) &msglen, sizeof (int));
/* send AP-REQ to the server */
safewrite (sock, out, outlen);
/* read a respond from server - what ? */
read (sock, &auth, sizeof (int));
/* For mutual authentication, wait for server reply. */
if (shishi_apreq_mutual_required_p (h, shishi_ap_req (ap)))
{
if (verbose)
printf ("Waiting for server to authenticate itself...\n");
/* read size of the AP-REP */
read (sock, (char *) &outlen, sizeof (int));
/* read AP-REP */
outlen = ntohl (outlen);
outlen = read (sock, out, outlen);
rc = shishi_ap_rep_verify_der (ap, out, outlen);
if (rc == SHISHI_OK)
{
if (verbose)
printf ("AP-REP verification OK...\n");
}
else
{
if (rc == SHISHI_APREP_VERIFY_FAILED)
printf ("AP-REP verification failed...\n");
else
printf ("AP-REP verification error: %s\n", shishi_strerror (rc));
return 1;
}
/* The server is authenticated. */
if (verbose)
printf ("Server authenticated.\n");
}
/* We are now authenticated. */
if (verbose)
printf ("User authenticated.\n");
return AUTH_OK;
}
static Shishi_ap *
auth (Shishi * h, int verbose, const char *cname, const char *sname)
{
Shishi_key *key;
Shishi_ap *ap;
Shishi_asn1 apreq;
char *buf;
size_t buflen;
int rc;
printf ("Client: %s\n", cname);
printf ("Server: %s\n", sname);
/* Get key for the server. */
key = shishi_hostkeys_for_server (h, sname);
if (!key)
{
printf ("could not find key: %s\n", shishi_error (h));
return NULL;
}
if (verbose)
shishi_key_print (h, stderr, key);
/* Read Authentication request from client */
printf ("Waiting for client to authenticate itself...\n");
rc = shishi_apreq_parse (h, stdin, &apreq);
if (rc != SHISHI_OK)
{
printf ("could not read AP-REQ: %s\n", shishi_strerror (rc));
return NULL;
}
/* Create Authentication context */
rc = shishi_ap (h, &ap);
if (rc != SHISHI_OK)
{
printf ("Could not create AP: %s\n", shishi_strerror (rc));
return NULL;
}
/* Store request in context */
shishi_ap_req_set (ap, apreq);
/* Process authentication request */
rc = shishi_ap_req_process (ap, key);
if (rc != SHISHI_OK)
{
printf ("Could not process AP-REQ: %s\n", shishi_strerror (rc));
return NULL;
}
if (verbose)
shishi_authenticator_print (h, stderr, shishi_ap_authenticator (ap));
rc = shishi_authenticator_client (h, shishi_ap_authenticator (ap),
&buf, &buflen);
printf ("Client name (from authenticator): %.*s\n", (int) buflen, buf);
free (buf);
rc = shishi_encticketpart_clientrealm
(h, shishi_tkt_encticketpart (shishi_ap_tkt (ap)), &buf, &buflen);
printf ("Client name (from encticketpart): %.*s\n", (int) buflen, buf);
free (buf);
rc = shishi_ticket_server (h, shishi_tkt_ticket (shishi_ap_tkt (ap)),
&buf, &buflen);
printf ("Server name (from ticket): %.*s\n", (int) buflen, buf);
free (buf);
/* User is authenticated. */
printf ("User authenticated.\n");
/* Authenticate ourself to client, if request */
if (shishi_apreq_mutual_required_p (h, apreq))
{
Shishi_asn1 aprep;
printf ("Mutual authentication required.\n");
rc = shishi_ap_rep_asn1 (ap, &aprep);
if (rc != SHISHI_OK)
{
printf ("Error creating AP-REP: %s\n", shishi_strerror (rc));
return NULL;
}
if (verbose)
shishi_encapreppart_print (h, stderr, shishi_ap_encapreppart (ap));
shishi_aprep_print (h, stdout, aprep);
/* We are authenticated to client */
}
return ap;
}
static Shishi_ap *
auth (Shishi * h, int verbose, const char *cname, const char *sname)
{
Shishi_ap *ap;
Shishi_tkt *tkt;
Shishi_tkts_hint hint;
int rc;
printf ("Client: %s\n", cname);
printf ("Server: %s\n", sname);
/* Get a ticket for the server. */
memset (&hint, 0, sizeof (hint));
hint.client = (char *) cname;
hint.server = (char *) sname;
tkt = shishi_tkts_get (shishi_tkts_default (h), &hint);
if (!tkt)
{
printf ("cannot find ticket for \"%s\"\n", sname);
return NULL;
}
if (verbose)
shishi_tkt_pretty_print (tkt, stderr);
/* Create Authentication context */
rc = shishi_ap_tktoptions (h, &ap, tkt, SHISHI_APOPTIONS_MUTUAL_REQUIRED);
if (rc != SHISHI_OK)
{
printf ("cannot create authentication context\n");
return NULL;
}
/* Build Authentication request */
rc = shishi_ap_req_build (ap);
if (rc != SHISHI_OK)
{
printf ("cannot build authentication request: %s\n",
shishi_strerror (rc));
return NULL;
}
if (verbose)
shishi_authenticator_print (h, stderr, shishi_ap_authenticator (ap));
/* Authentication ourself to server */
shishi_apreq_print (h, stdout, shishi_ap_req (ap));
/* Note: to get the binary blob to send, use:
*
* char *out; int outlen;
* ...
* rc = shishi_ap_req_der (ap, &out, &outlen);
* ...
* write(fd, out, outlen);
*/
/* For mutual authentication, wait for server reply. */
if (shishi_apreq_mutual_required_p (h, shishi_ap_req (ap)))
{
Shishi_asn1 aprep;
printf ("Waiting for server to authenticate itself...\n");
rc = shishi_aprep_parse (h, stdin, &aprep);
if (rc != SHISHI_OK)
{
printf ("Cannot parse AP-REP from server: %s\n",
shishi_strerror (rc));
return NULL;
}
rc = shishi_ap_rep_verify_asn1 (ap, aprep);
if (rc == SHISHI_OK)
printf ("AP-REP verification OK...\n");
else
{
if (rc == SHISHI_APREP_VERIFY_FAILED)
printf ("AP-REP verification failed...\n");
else
printf ("AP-REP verification error: %s\n", shishi_strerror (rc));
return NULL;
}
/* The server is authenticated. */
printf ("Server authenticated.\n");
}
/* We are now authenticated. */
printf ("User authenticated.\n");
return ap;
}
void
test (Shishi * handle)
{
Shishi_asn1 a;
char *p, *buf, *buf2;
int res;
size_t n, m;
int32_t t;
uint32_t s;
/* shishi_authenticator */
a = shishi_authenticator (handle);
if (debug)
printf ("shishi_authenticator () => `%p'.\n", a);
if (a)
success ("shishi_authenticator() OK\n");
else
fail ("shishi_authenticator() failed\n");
if (debug)
shishi_authenticator_print (handle, stdout, a);
res = shishi_authenticator_remove_subkey (handle, a);
if (res == SHISHI_OK)
success ("shishi_authenticator_remove_subkey() OK\n");
else
fail ("shishi_authenticator_remove_subkey() failed\n");
/* shishi_authenticator_seqnumber_get */
res = shishi_authenticator_seqnumber_get (handle, a, &s);
if (res == SHISHI_OK)
success ("shishi_authenticator_seqnumber_get() OK\n");
else
fail ("shishi_authenticator_seqnumber_get() failed\n");
/* shishi_authenticator_seqnumber_set */
res = shishi_authenticator_seqnumber_set (handle, a, 42);
if (res == SHISHI_OK)
success ("shishi_authenticator_seqnumber_set() OK\n");
else
fail ("shishi_authenticator_seqnumber_set() failed\n");
/* shishi_authenticator_seqnumber_get */
res = shishi_authenticator_seqnumber_get (handle, a, &s);
if (res == SHISHI_OK && s == 42)
success ("shishi_authenticator_seqnumber_get() OK\n");
else
fail ("shishi_authenticator_seqnumber_get() failed\n");
/* shishi_authenticator_seqnumber_remove */
res = shishi_authenticator_seqnumber_remove (handle, a);
if (res == SHISHI_OK)
success ("shishi_authenticator_seqnumber_remove() OK\n");
else
fail ("shishi_authenticator_seqnumber_remove() failed\n");
/* shishi_authenticator_set_crealm */
res = shishi_authenticator_set_crealm (handle, a, "foo");
if (res == SHISHI_OK)
success ("shishi_authenticator_set_crealm() OK\n");
else
fail ("shishi_authenticator_set_crealm() failed\n");
/* shishi_authenticator_client_set */
res = shishi_authenticator_client_set (handle, a, "foo/bar/baz");
if (res == SHISHI_OK)
success ("shishi_authenticator_client_set() OK\n");
else
fail ("shishi_authenticator_client_set() failed\n");
/* shishi_authenticator_client */
res = shishi_authenticator_client (handle, a, &buf, &n);
if (debug)
escapeprint (buf, n);
if (res == SHISHI_OK &&
n == strlen ("foo/bar/baz") && memcmp (buf, "foo/bar/baz", n) == 0)
success ("shishi_authenticator_client() OK\n");
else
fail ("shishi_authenticator_client() failed\n");
if (res == SHISHI_OK)
free (buf);
/* shishi_authenticator_client_set */
res = shishi_authenticator_client_set (handle, a, "foo");
if (res == SHISHI_OK)
success ("shishi_authenticator_client_set() OK\n");
else
fail ("shishi_authenticator_client_set() failed\n");
/* shishi_authenticator_client */
res = shishi_authenticator_client (handle, a, &buf, &n);
if (debug)
escapeprint (buf, n);
if (res == SHISHI_OK && n == strlen ("foo") && memcmp (buf, "foo", n) == 0)
success ("shishi_authenticator_client() OK\n");
else
fail ("shishi_authenticator_client() failed\n");
if (res == SHISHI_OK)
free (buf);
/* shishi_authenticator_set_crealm */
res = shishi_authenticator_set_crealm (handle, a, "bar");
if (res == SHISHI_OK)
success ("shishi_authenticator_set_crealm() OK\n");
else
fail ("shishi_authenticator_set_crealm() failed\n");
/* shishi_authenticator_clientrealm */
res = shishi_authenticator_clientrealm (handle, a, &buf, &n);
if (debug)
escapeprint (buf, n);
if (res == SHISHI_OK &&
n == strlen ("foo@bar") && memcmp (buf, "foo@bar", n) == 0)
success ("shishi_authenticator_clientrealm() OK\n");
else
fail ("shishi_authenticator_clientrealm() failed\n");
if (res == SHISHI_OK)
free (buf);
/* shishi_authenticator_add_authorizationdata */
res = shishi_authenticator_add_authorizationdata (handle, a, 42, "baz", 3);
if (res == SHISHI_OK)
success ("shishi_authenticator_add_authorizationdata() OK\n");
else
fail ("shishi_authenticator_add_authorizationdata() failed\n");
/* shishi_authenticator_authorizationdata */
res = shishi_authenticator_authorizationdata (handle, a, &t, &buf, &m, 1);
if (debug)
escapeprint (buf, m);
if (res == SHISHI_OK && t == 42 && m == 3 && memcmp (buf, "baz", 3) == 0)
success ("shishi_authenticator_authorizationdata() OK\n");
else
fail ("shishi_authenticator_authorizationdata() failed\n");
if (res == SHISHI_OK)
free (buf);
/* shishi_authenticator_authorizationdata */
res = shishi_authenticator_authorizationdata (handle, a, &t, &buf, &m, 2);
if (res == SHISHI_OK)
free (buf);
if (res == SHISHI_OUT_OF_RANGE)
success ("shishi_authenticator_authorizationdata() OK\n");
else
fail ("shishi_authenticator_authorizationdata() failed\n");
/* shishi_authenticator_remove_cksum */
res = shishi_authenticator_remove_cksum (handle, a);
if (res == SHISHI_OK)
success ("shishi_authenticator_remove_cksum() OK\n");
else
fail ("shishi_authenticator_remove_cksum() failed\n");
/* shishi_asn1_to_der */
res = shishi_asn1_to_der (handle, a, &buf, &n);
if (res == SHISHI_OK)
success ("shishi_asn1_to_der() OK\n");
else
n = 0, fail ("shishi_asn1_to_der() failed\n");
/* shishi_authenticator_to_file */
res = shishi_authenticator_to_file (handle, a, SHISHI_FILETYPE_TEXT,
"authenticator.tmp");
if (res == SHISHI_OK)
success ("shishi_authenticator_to_file() OK\n");
else
fail ("shishi_authenticator_to_file() failed\n");
/* shishi_asn1_done */
shishi_asn1_done (handle, a);
success ("shishi_asn1_done() OK\n");
a = NULL;
/* shishi_authenticator_from_file */
res = shishi_authenticator_from_file (handle, &a, SHISHI_FILETYPE_TEXT,
"authenticator.tmp");
if (res == SHISHI_OK)
success ("shishi_authenticator_from_file() OK\n");
else
fail ("shishi_authenticator_from_file() failed\n");
if (debug)
{
/* shishi_authenticator_print */
res = shishi_authenticator_print (handle, stdout, a);
if (res == SHISHI_OK)
success ("shishi_authenticator_print() OK\n");
else
fail ("shishi_authenticator_print() failed\n");
}
/* shishi_asn1_to_der */
res = shishi_asn1_to_der (handle, a, &buf2, &m);
if (res == SHISHI_OK)
success ("shishi_asn1_to_der() OK\n");
else
n = 0, fail ("shishi_asn1_to_der() failed\n");
/* Compare DER encodings of authenticators */
if (n > 0 && m > 0 && n == m && memcmp (buf, buf2, n) == 0)
success ("DER comparison OK\n");
else
fail ("DER comparison failed\n");
free (buf);
free (buf2);
/* shishi_authenticator_cusec_set */
res = shishi_authenticator_cusec_set (handle, a, 4711);
if (res == SHISHI_OK)
success ("shishi_authenticator_cusec_set() OK\n");
else
fail ("shishi_authenticator_cusec_set() failed\n");
/* shishi_authenticator_cusec_get */
res = shishi_authenticator_cusec_get (handle, a, &s);
if (debug)
printf ("shishi_authenticator_cusec_get () => `%d'.\n", t);
if (res == SHISHI_OK && s == 4711)
success ("shishi_authenticator_cusec_get() OK\n");
else
fail ("shishi_authenticator_cusec_get() failed\n");
/* shishi_authenticator_ctime_set */
res = shishi_authenticator_ctime_set (handle, a, "19700101011831Z");
if (res == SHISHI_OK)
success ("shishi_authenticator_ctime_set() OK\n");
else
fail ("shishi_authenticator_ctime_set() failed\n");
/* shishi_authenticator_ctime */
res = shishi_authenticator_ctime (handle, a, &p);
if (debug)
escapeprint (p, strlen (p));
if (res == SHISHI_OK && memcmp (p, "19700101011831Z", 15) == 0)
success ("shishi_authenticator_ctime() OK\n");
else
fail ("shishi_authenticator_ctime() failed\n");
if (res == SHISHI_OK)
free (p);
/* shishi_asn1_to_der */
res = shishi_asn1_to_der (handle, a, &buf, &n);
if (res == SHISHI_OK)
success ("shishi_asn1_to_der() OK\n");
else
n = 0, fail ("shishi_asn1_to_der() failed\n");
if (debug)
{
shishi_authenticator_print (handle, stdout, a);
hexprint (buf, n);
puts ("");
hexprint (authenticator, sizeof (authenticator));
puts ("");
}
if (n == sizeof (authenticator) &&
n == AUTHENTICATOR_LEN && memcmp (authenticator, buf, n) == 0)
success ("DER comparison OK\n");
else
fail ("DER comparison failed\n");
free (buf);
/* shishi_authenticator_clear_authorizationdata */
res = shishi_authenticator_clear_authorizationdata (handle, a);
if (res == SHISHI_OK)
success ("shishi_authenticator_clear_authorizationdata() OK\n");
else
fail ("shishi_authenticator_clear_authorizationdata() failed\n");
/* shishi_asn1_to_der */
res = shishi_asn1_to_der (handle, a, &buf, &n);
if (res == SHISHI_OK)
success ("shishi_asn1_to_der() OK\n");
else
n = 0, fail ("shishi_asn1_to_der() failed\n");
if (debug)
{
shishi_authenticator_print (handle, stdout, a);
hexprint (buf, n);
puts ("");
hexprint (authenticator2, sizeof (authenticator2));
puts ("");
}
if (n == sizeof (authenticator2) &&
n == AUTHENTICATOR2_LEN && memcmp (authenticator2, buf, n) == 0)
success ("DER comparison OK\n");
else
fail ("DER comparison failed\n");
free (buf);
/* unlink */
res = unlink ("authenticator.tmp");
if (res == 0)
success ("unlink() OK\n");
else
fail ("unlink() failed\n");
/* shishi_asn1_done */
shishi_asn1_done (handle, a);
success ("shishi_asn1_done() OK\n");
}