#ifdef HAVE_ADS
-#if USE_CYRUS_SASL
-/*
- this is a minimal interact function, just enough for SASL to talk
- GSSAPI/kerberos to W2K
- Error handling is a bit of a problem. I can't see how to get Cyrus-sasl
- to give sensible errors
+/*
+ perform a LDAP/SASL/SPNEGO/NTLMSSP bind (just how many layers can
+ we fit on one socket??)
*/
-static int sasl_interact(LDAP *ld,unsigned flags,void *defaults,void *in)
+static ADS_STATUS ads_sasl_spnego_ntlmssp_bind(ADS_STRUCT *ads)
{
- sasl_interact_t *interact = in;
+ const char *mechs[] = {OID_NTLMSSP, NULL};
+ DATA_BLOB msg1;
+ DATA_BLOB blob, chal1, chal2, auth;
+ uint8 challenge[8];
+ uint8 nthash[24], lmhash[24], sess_key[16];
+ uint32 neg_flags;
+ struct berval cred, *scred;
+ ADS_STATUS status;
+ extern pstring global_myname;
+ int rc;
+
+ neg_flags = NTLMSSP_NEGOTIATE_UNICODE |
+ NTLMSSP_NEGOTIATE_128 |
+ NTLMSSP_NEGOTIATE_NTLM;
+
+ memset(sess_key, 0, 16);
- while (interact->id != SASL_CB_LIST_END) {
- interact->result = strdup("");
- interact->len = strlen(interact->result);
- interact++;
+ /* generate the ntlmssp negotiate packet */
+ msrpc_gen(&blob, "CddB",
+ "NTLMSSP",
+ NTLMSSP_NEGOTIATE,
+ neg_flags,
+ sess_key, 16);
+
+ /* and wrap it in a SPNEGO wrapper */
+ msg1 = gen_negTokenTarg(mechs, blob);
+ data_blob_free(&blob);
+
+ cred.bv_val = msg1.data;
+ cred.bv_len = msg1.length;
+
+ rc = ldap_sasl_bind_s(ads->ld, NULL, "GSS-SPNEGO", &cred, NULL, NULL, &scred);
+ if (rc != LDAP_SASL_BIND_IN_PROGRESS) {
+ status = ADS_ERROR(rc);
+ goto failed;
}
-
- return LDAP_SUCCESS;
+
+ blob = data_blob(scred->bv_val, scred->bv_len);
+
+ /* the server gives us back two challenges */
+ if (!spnego_parse_challenge(blob, &chal1, &chal2)) {
+ DEBUG(3,("Failed to parse challenges\n"));
+ status = ADS_ERROR(LDAP_OPERATIONS_ERROR);
+ goto failed;
+ }
+
+ data_blob_free(&blob);
+
+ /* encrypt the password with the challenge */
+ memcpy(challenge, chal1.data + 24, 8);
+ SMBencrypt(ads->auth.password, challenge,lmhash);
+ SMBNTencrypt(ads->auth.password, challenge,nthash);
+
+ data_blob_free(&chal1);
+ data_blob_free(&chal2);
+
+ /* this generates the actual auth packet */
+ msrpc_gen(&blob, "CdBBUUUBd",
+ "NTLMSSP",
+ NTLMSSP_AUTH,
+ lmhash, 24,
+ nthash, 24,
+ lp_workgroup(),
+ ads->auth.user_name,
+ global_myname,
+ sess_key, 16,
+ neg_flags);
+
+ /* wrap it in SPNEGO */
+ auth = spnego_gen_auth(blob);
+
+ data_blob_free(&blob);
+
+ /* now send the auth packet and we should be done */
+ cred.bv_val = auth.data;
+ cred.bv_len = auth.length;
+
+ rc = ldap_sasl_bind_s(ads->ld, NULL, "GSS-SPNEGO", &cred, NULL, NULL, &scred);
+
+ return ADS_ERROR(rc);
+
+failed:
+ return status;
+}
+
+/*
+ perform a LDAP/SASL/SPNEGO/KRB5 bind
+*/
+static ADS_STATUS ads_sasl_spnego_krb5_bind(ADS_STRUCT *ads, const char *principal)
+{
+ DATA_BLOB blob;
+ struct berval cred, *scred;
+ int rc;
+
+ blob = spnego_gen_negTokenTarg(principal);
+
+ if (!blob.data) {
+ return ADS_ERROR(LDAP_OPERATIONS_ERROR);
+ }
+
+ /* now send the auth packet and we should be done */
+ cred.bv_val = blob.data;
+ cred.bv_len = blob.length;
+
+ rc = ldap_sasl_bind_s(ads->ld, NULL, "GSS-SPNEGO", &cred, NULL, NULL, &scred);
+
+ data_blob_free(&blob);
+
+ return ADS_ERROR(rc);
}
+
+/*
+ this performs a SASL/SPNEGO bind
+*/
+static ADS_STATUS ads_sasl_spnego_bind(ADS_STRUCT *ads)
+{
+ struct berval *scred;
+ int rc, i;
+ ADS_STATUS status;
+ DATA_BLOB blob;
+ char *principal;
+ char *OIDs[ASN1_MAX_OIDS];
+ BOOL got_kerberos_mechanism = False;
+
+ rc = ldap_sasl_bind_s(ads->ld, NULL, "GSS-SPNEGO", NULL, NULL, NULL, &scred);
+
+ if (rc != LDAP_SASL_BIND_IN_PROGRESS) {
+ status = ADS_ERROR(rc);
+ goto failed;
+ }
+
+ blob = data_blob(scred->bv_val, scred->bv_len);
+
+#if 0
+ file_save("sasl_spnego.dat", blob.data, blob.length);
#endif
+ /* the server sent us the first part of the SPNEGO exchange in the negprot
+ reply */
+ if (!spnego_parse_negTokenInit(blob, OIDs, &principal)) {
+ data_blob_free(&blob);
+ status = ADS_ERROR(LDAP_OPERATIONS_ERROR);
+ goto failed;
+ }
+ data_blob_free(&blob);
+
+ /* make sure the server understands kerberos */
+ for (i=0;OIDs[i];i++) {
+ DEBUG(3,("got OID=%s\n", OIDs[i]));
+ if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 ||
+ strcmp(OIDs[i], OID_KERBEROS5) == 0) {
+ got_kerberos_mechanism = True;
+ }
+ free(OIDs[i]);
+ }
+ DEBUG(3,("got principal=%s\n", principal));
+ if (got_kerberos_mechanism && ads_kinit_password(ads) == 0) {
+ return ads_sasl_spnego_krb5_bind(ads, principal);
+ }
+
+ /* lets do NTLMSSP ... this has the big advantage that we don't need
+ to sync clocks, and we don't rely on special versions of the krb5
+ library for HMAC_MD4 encryption */
+ return ads_sasl_spnego_ntlmssp_bind(ads);
+
+failed:
+ return status;
+}
+
+#ifdef HAVE_GSSAPI
#define MAX_GSS_PASSES 3
/* this performs a SASL/gssapi bind
we avoid using cyrus-sasl to make Samba more robust. cyrus-sasl
is very dependent on correctly configured DNS whereas
this routine is much less fragile
- see RFC2078 for details
+ see RFC2078 and RFC2222 for details
*/
-ADS_STATUS ads_sasl_gssapi_bind(ADS_STRUCT *ads)
+static ADS_STATUS ads_sasl_gssapi_bind(ADS_STRUCT *ads)
{
int minor_status;
gss_name_t serv_name;
uint8 *p;
uint32 max_msg_size;
char *sname;
+ unsigned sec_layer;
ADS_STATUS status;
krb5_principal principal;
krb5_context ctx;
p = (uint8 *)output_token.value;
+ file_save("sasl_gssapi.dat", output_token.value, output_token.length);
+
max_msg_size = (p[1]<<16) | (p[2]<<8) | p[3];
+ sec_layer = *p;
gss_release_buffer(&minor_status, &output_token);
output_token.value = malloc(strlen(ads->config.bind_path) + 8);
p = output_token.value;
- *p++ = 1; /* no sign or seal */
+ *p++ = 1; /* no sign & seal selection */
/* choose the same size as the server gave us */
*p++ = max_msg_size>>16;
*p++ = max_msg_size>>8;
*p++ = max_msg_size;
snprintf(p, strlen(ads->config.bind_path)+4, "dn:%s", ads->config.bind_path);
- p += strlen(ads->config.bind_path);
+ p += strlen(p);
- output_token.length = strlen(ads->config.bind_path) + 8;
+ output_token.length = PTR_DIFF(p, output_token.value);
gss_rc = gss_wrap(&minor_status, context_handle,0,GSS_C_QOP_DEFAULT,
&output_token, &conf_state,
failed:
return status;
}
+#endif
+
+/* mapping between SASL mechanisms and functions */
+static struct {
+ const char *name;
+ ADS_STATUS (*fn)(ADS_STRUCT *);
+} sasl_mechanisms[] = {
+ {"GSS-SPNEGO", ads_sasl_spnego_bind},
+#ifdef HAVE_GSSAPI
+ {"GSSAPI", ads_sasl_gssapi_bind}, /* doesn't work with .NET RC1. No idea why */
+#endif
+ {NULL, NULL}
+};
ADS_STATUS ads_sasl_bind(ADS_STRUCT *ads)
{
-#if USE_CYRUS_SASL
- int rc;
- rc = ldap_sasl_interactive_bind_s(ads->ld, NULL, NULL, NULL, NULL,
- LDAP_SASL_QUIET,
- sasl_interact, NULL);
- return ADS_ERROR(rc);
-#else
- return ads_sasl_gssapi_bind(ads);
-#endif
+ const char *attrs[] = {"supportedSASLMechanisms", NULL};
+ char **values;
+ ADS_STATUS status;
+ int i, j;
+ void *res;
+
+ /* get a list of supported SASL mechanisms */
+ status = ads_do_search(ads, "", LDAP_SCOPE_BASE, "(objectclass=*)", attrs, &res);
+ if (!ADS_ERR_OK(status)) return status;
+
+ values = ldap_get_values(ads->ld, res, "supportedSASLMechanisms");
+
+ /* try our supported mechanisms in order */
+ for (i=0;sasl_mechanisms[i].name;i++) {
+ /* see if the server supports it */
+ for (j=0;values && values[j];j++) {
+ if (strcmp(values[j], sasl_mechanisms[i].name) == 0) {
+ DEBUG(4,("Found SASL mechanism %s\n", values[j]));
+ status = sasl_mechanisms[i].fn(ads);
+ ldap_value_free(values);
+ ldap_msgfree(res);
+ return status;
+ }
+ }
+ }
+
+ ldap_value_free(values);
+ ldap_msgfree(res);
+ return ADS_ERROR(LDAP_AUTH_METHOD_NOT_SUPPORTED);
}
#endif
git.samba.org / ira / wip.git / commitdiff