#include "config.h"
#endif /* HAVE_CONFIG_H */
+#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <arpa/inet.h>
+#ifdef HAVE_KERBEROS
+#ifdef HAVE_KRB5_KRB5_H
+#include <krb5/krb5.h>
+#else
+#include <krb5.h>
+#endif /* HAVE_KRB5_KRB5_H */
+#endif /* HAVE_KERBEROS */
+
#include <atalk/dsi.h>
#include <atalk/unicode.h>
#include <atalk/util.h>
#include "status.h"
#include "afp_config.h"
#include "icon.h"
+#include "uam_auth.h"
static size_t maxstatuslen = 0;
-static void status_flags(char *data, const int notif, const int ipok,
- const unsigned char passwdbits, const int dirsrvcs _U_, int flags)
+static int uam_gss_enabled()
+{
+ /* XXX: must be a better way to find out if uam_gss is active */
+ return auth_uamfind(UAM_SERVER_LOGIN_EXT,
+ "Client Krb v2",
+ sizeof("Client Krb v2")) != NULL;
+}
+
+static void status_flags(char *data,
+ const int notif,
+ const int ipok,
+ const unsigned char passwdbits,
+ const int dirsrvcs,
+ int flags)
{
uint16_t status;
| AFPSRVRINFO_SRVSIGNATURE
| AFPSRVRINFO_SRVMSGS
| AFPSRVRINFO_FASTBOZO
- | AFPSRVRINFO_SRVRDIR
| AFPSRVRINFO_SRVUTF8
| AFPSRVRINFO_EXTSLEEP;
status |= AFPSRVRINFO_PASSWD;
if (passwdbits & PASSWD_NOSAVE)
status |= AFPSRVRINFO_NOSAVEPASSWD;
- if (ipok) /* only advertise tcp/ip if we have a valid address */
+ if (ipok) /* only advertise tcp/ip if we have a valid address */
status |= AFPSRVRINFO_TCPIP;
- if (notif) /* Default is yes */
+ if (notif) /* Default is yes */
status |= AFPSRVRINFO_SRVNOTIFY;
+ if (dirsrvcs)
+ status |= AFPSRVRINFO_SRVRDIR;
if (flags & OPTION_UUID)
status |= AFPSRVRINFO_UUID;
return (data - begin);
}
-static size_t status_directorynames(char *data, int *diroffset,
- const DSI *dsi _U_,
- const struct afp_options *options)
+static bool append_directoryname(char **pdata,
+ size_t offset,
+ size_t *size,
+ char* DirectoryNamesCount,
+ size_t len,
+ char *principal)
+{
+ if (sizeof(uint8_t) + len > maxstatuslen - offset - *size) {
+ LOG(log_error, logtype_afpd,
+ "status:DirectoryNames: out of space for principal '%s' (len=%d)",
+ principal, len);
+ return false;
+ } else if (len > 255) {
+ LOG(log_error, logtype_afpd,
+ "status:DirectoryNames: principal '%s' (len=%d) too long (max=255)",
+ principal, len);
+ return false;
+ }
+
+ LOG(log_info, logtype_afpd,
+ "DirectoryNames[%d]=%s",
+ *DirectoryNamesCount, principal);
+
+ *DirectoryNamesCount += 1;
+ char *data = *pdata;
+ *data++ = len;
+ strncpy(data, principal, len);
+
+ *pdata += len + 1;
+ *size += sizeof(uint8_t) + len;
+
+ return true;
+}
+
+/**
+ * DirectoryNamesCount offset: uint16_t
+ * ...
+ * DirectoryNamesCount: uint8_t
+ * DirectoryNames: list of UTF-8 Pascal strings (uint8_t + char[1,255])
+ */
+static size_t status_directorynames(char *data,
+ int *diroffset,
+ const DSI *dsi _U_,
+ const struct afp_options *options _U_)
{
char *begin = data;
uint16_t offset;
- memcpy(&offset, data + *diroffset, sizeof(offset));
+
+ memcpy(&offset, begin + *diroffset, sizeof(offset));
offset = ntohs(offset);
data += offset;
- /* I can not find documentation of any other purpose for the
- * DirectoryNames field.
- */
- /*
- * Try to synthesize a principal:
- * service '/' fqdn '@' realm
- */
- if (options->k5service && options->k5realm && options->fqdn) {
- /* should k5princ be utf8 encoded? */
- size_t len;
- char *p = strchr( options->fqdn, ':' );
- if (p)
- *p = '\0';
- len = strlen( options->k5service )
- + strlen( options->fqdn )
- + strlen( options->k5realm );
- len+=2; /* '/' and '@' */
- if ( len > 255 || len+2 > maxstatuslen - offset) {
- *data++ = 0;
- LOG ( log_error, logtype_afpd, "status: could not set directory service list, no more room");
- }
- else {
- *data++ = 1; /* DirectoryNamesCount */
- *data++ = len;
- snprintf( data, len + 1, "%s/%s@%s", options->k5service,
- options->fqdn, options->k5realm );
- data += len;
- if (p)
- *p = ':';
- }
+ char *DirectoryNamesCount = data++, *DirectoryNames = data;
+ *DirectoryNamesCount = 0;
+ size_t size = sizeof(uint8_t);
+
+ if (!uam_gss_enabled())
+ goto offset_calc;
+
+#ifdef HAVE_KERBEROS
+ krb5_context context;
+ krb5_error_code ret;
+ const char *error_msg;
+
+ if (krb5_init_context(&context)) {
+ LOG(log_error, logtype_afpd,
+ "status:DirectoryNames failed to intialize a krb5_context");
+ goto offset_calc;
+ }
+
+ krb5_keytab keytab;
+ if ((ret = krb5_kt_default(context, &keytab)))
+ goto krb5_error;
+
+ // figure out which service principal to use
+ krb5_keytab_entry entry;
+ char *principal;
+ if (options->k5service && options->fqdn && options->k5realm) {
+ LOG(log_debug, logtype_afpd,
+ "status:DirectoryNames: using service principal specified in options");
+
+ krb5_principal service_principal;
+ if ((ret = krb5_build_principal(context,
+ &service_principal,
+ strlen(options->k5realm),
+ options->k5realm,
+ options->k5service,
+ options->fqdn,
+ NULL)))
+ goto krb5_error;
+
+ // try to get the given service principal from keytab
+ ret = krb5_kt_get_entry(context,
+ keytab,
+ service_principal,
+ 0, // kvno - wildcard
+ 0, // enctype - wildcard
+ &entry);
+ if (ret == KRB5_KT_NOTFOUND) {
+ krb5_unparse_name(context, service_principal, &principal);
+ LOG(log_error, logtype_afpd,
+ "status:DirectoryNames: specified service principal '%s' not found in keytab",
+ principal);
+ // XXX: should this be krb5_xfree?
+ krb5_free_unparsed_name(context, principal);
+ goto krb5_cleanup;
+ }
+ krb5_free_principal(context, service_principal);
+ if (ret)
+ goto krb5_error;
} else {
- *data++ = 0;
+ LOG(log_debug, logtype_afpd,
+ "status:DirectoryNames: using first entry from keytab as service principal");
+
+ krb5_kt_cursor cursor;
+ if ((ret = krb5_kt_start_seq_get(context, keytab, &cursor)))
+ goto krb5_error;
+
+ ret = krb5_kt_next_entry(context, keytab, &entry, &cursor);
+ krb5_kt_end_seq_get(context, keytab, &cursor);
+ if (ret)
+ goto krb5_error;
}
+ krb5_unparse_name(context, entry.principal, &principal);
+ krb5_kt_free_entry(context, &entry);
+
+ append_directoryname(&data,
+ offset,
+ &size,
+ DirectoryNamesCount,
+ strlen(principal),
+ principal);
+
+ // XXX: should this be krb5_xfree?
+ krb5_free_unparsed_name(context, principal);
+ goto krb5_cleanup;
+
+krb5_error:
+ if (ret) {
+ error_msg = krb5_get_error_message(context, ret);
+ LOG(log_error, logtype_afpd,
+ "status:DirectoryNames: Kerberos error: %s",
+ (char *) error_msg);
+ krb5_free_error_message(context, error_msg);
+ }
+
+krb5_cleanup:
+ krb5_kt_close(context, keytab);
+ krb5_free_context(context);
+#else
+ if (!options->k5service || !options->fqdn || !options->k5realm)
+ goto offset_calc;
+
+ char principal[255];
+ size_t len = snprintf(principal, sizeof(principal), "%s/%s@%s",
+ options->k5service, options->fqdn, options->k5realm);
+
+ append_directoryname(&data,
+ offset,
+ &size,
+ DirectoryNamesCount,
+ strlen(principal),
+ principal);
+#endif // HAVE_KERBEROS
+
+offset_calc:
/* Calculate and store offset for UTF8ServerName */
*diroffset += sizeof(uint16_t);
offset = htons(data - begin);
*/
/* extract the obj part of the server */
- Obj = (char *) (options->server ? options->server : options->hostname);
+ Obj = options->hostname;
if ((size_t) -1 == (len = convert_string (
options->unixcharset, CH_UTF8_MAC,
Obj, -1, data+sizeof(namelen), maxstatuslen-offset )) ) {
/* ---------------------
*/
-void status_init(AFPConfig *dsiconfig,
- const struct afp_options *options)
+void status_init(AFPObj *obj, DSI *dsi)
{
- DSI *dsi;
- char *status = NULL;
+ char *status = dsi->status;
size_t statuslen;
- int c, sigoff, ipok;
-
- if (!dsiconfig || !options)
- return;
-
- ipok = 0;
- if (dsiconfig) {
- status = dsiconfig->status;
- maxstatuslen=sizeof(dsiconfig->status);
- dsi = dsiconfig->obj.handle;
- if (dsi->server.ss_family == AF_INET) { /* IPv4 */
- const struct sockaddr_in *sa4 = (struct sockaddr_in *)&dsi->server;
- ipok = sa4->sin_addr.s_addr ? 1 : 0;
- } else { /* IPv6 */
- const struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&dsi->server;
- for (int i=0; i<16; i++) {
- if (sa6->sin6_addr.s6_addr[i]) {
- ipok = 1;
- break;
- }
+ int c, sigoff, ipok = 0;
+ const struct afp_options *options = &obj->options;
+
+ maxstatuslen = sizeof(dsi->status);
+
+ if (dsi->server.ss_family == AF_INET) { /* IPv4 */
+ const struct sockaddr_in *sa4 = (struct sockaddr_in *)&dsi->server;
+ ipok = sa4->sin_addr.s_addr ? 1 : 0;
+ } else { /* IPv6 */
+ const struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)&dsi->server;
+ for (int i=0; i<16; i++) {
+ if (sa6->sin6_addr.s6_addr[i]) {
+ ipok = 1;
+ break;
}
}
- } else
- dsi = NULL;
+ }
/*
* These routines must be called in order -- earlier calls
*/
status_flags(status,
- options->server_notif,
+ options->flags & OPTION_SERVERNOTIF,
(options->fqdn || ipok),
options->passwdbits,
- (options->k5service && options->k5realm && options->fqdn),
+ uam_gss_enabled(),
options->flags);
/* returns offset to signature offset */
- c = status_server(status, options->server ? options->server :
- options->hostname, options);
+ c = status_server(status, options->hostname, options);
status_machine(status);
status_versions(status, dsi);
status_uams(status, options->uamlist);
if ( statuslen < maxstatuslen)
statuslen = status_utf8servername(status, &c, dsi, options);
- if (dsiconfig) {
- if ((options->flags & OPTION_CUSTOMICON) == 0) {
- status_icon(status, apple_tcp_icon, sizeof(apple_tcp_icon), 0);
- }
- dsi_setstatus(dsi, status, statuslen);
- dsiconfig->signature = status + sigoff;
- dsiconfig->statuslen = statuslen;
+ if ((options->flags & OPTION_CUSTOMICON) == 0) {
+ status_icon(status, apple_tcp_icon, sizeof(apple_tcp_icon), 0);
}
+
+ dsi->signature = status + sigoff;
+ dsi->statuslen = statuslen;
}
/* set_signature() */
/* If not found in conf file, genarate and append in conf file. */
/* If conf file don't exist, create and genarate. */
/* If cannot open conf file, use one-time signature. */
-/* If -signature user:xxxxx, use it. */
+/* If signature = xxxxx, use it. */
void set_signature(struct afp_options *options) {
- char *usersign;
int fd, i;
struct stat tmpstat;
char *servername_conf;
size_t len;
char *server_tmp;
- server_tmp = (options->server ? options->server : options->hostname);
- if (strcmp(options->signatureopt, "auto") == 0) {
+ server_tmp = options->hostname;
+ len = strlen(options->signatureopt);
+ if (len == 0) {
goto server_signature_auto; /* default */
- } else if (strcmp(options->signatureopt, "host") == 0) {
- LOG(log_warning, logtype_afpd, "WARNING: option \"-signature host\" is obsoleted. Switching back to auto.", options->signatureopt);
- goto server_signature_auto; /* same as auto */
- } else if (strncmp(options->signatureopt, "user", 4) == 0) {
- goto server_signature_user; /* user string */
+ } else if (len < 3) {
+ LOG(log_warning, logtype_afpd, "WARNING: signature string %s is very short !", options->signatureopt);
+ goto server_signature_user;
+ } else if (len > 16) {
+ LOG(log_warning, logtype_afpd, "WARNING: signature string %s is very long !", options->signatureopt);
+ len = 16;
+ goto server_signature_user;
} else {
- LOG(log_error, logtype_afpd, "ERROR: option \"-signature %s\" is not valid. Switching back to auto.", options->signatureopt);
- goto server_signature_auto; /* switch back to auto*/
+ LOG(log_info, logtype_afpd, "signature string is %s.", options->signatureopt);
+ goto server_signature_user;
}
server_signature_user:
- /* Signature type is user string */
- len = strlen(options->signatureopt);
- if (len <= 5) {
- LOG(log_warning, logtype_afpd, "WARNING: option \"-signature %s\" is not valid. Switching back to auto.", options->signatureopt);
- goto server_signature_auto;
- }
- usersign = options->signatureopt + 5;
- len = len - 5;
- if (len > 16) {
- LOG(log_warning, logtype_afpd, "WARNING: signature user string %s is very long !", usersign);
- len = 16;
- } else if (len >= 3) {
- LOG(log_info, logtype_afpd, "signature user string is %s.", usersign);
- } else {
- LOG(log_warning, logtype_afpd, "WARNING: signature user string %s is very short !", usersign);
- }
+ /* Signature is defined in afp.conf */
memset(options->signature, 0, 16);
- memcpy(options->signature, usersign, len);
+ memcpy(options->signature, options->signatureopt, len);
goto server_signature_done;
server_signature_auto:
fprintf(fp, "# ServerSignature is unique identifier used to prevent logging on to\n");
fprintf(fp, "# the same server twice.\n");
fprintf(fp, "# \n");
- fprintf(fp, "# If setting \"-signature user:xxxxx\" in afpd.conf, this file is not used.\n\n");
+ fprintf(fp, "# If setting \"signature = xxxxx\" in afp.conf, this file is not used.\n\n");
}
if (fp) {
/* retrun */
LOG(log_info, logtype_afpd,
- " \"%s\"'s signature is %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
- server_tmp,
+ "signature is %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
(options->signature)[ 0], (options->signature)[ 1],
(options->signature)[ 2], (options->signature)[ 3],
(options->signature)[ 4], (options->signature)[ 5],
/* this is the same as asp/dsi_getstatus */
int afp_getsrvrinfo(AFPObj *obj, char *ibuf _U_, size_t ibuflen _U_, char *rbuf, size_t *rbuflen)
{
- AFPConfig *config = obj->config;
+ memcpy(rbuf, obj->dsi->status, obj->dsi->statuslen);
+ *rbuflen = obj->dsi->statuslen;
- memcpy(rbuf, config->status, config->statuslen);
- *rbuflen = config->statuslen;
return AFP_OK;
}
projects / netatalk.git / blobdiff