Copyright (C) Andrew Tridgell 2001
Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
Copyright (C) Luke Howard 2003
-
+ Copyright (C) Jeremy Allison 2010
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
+#include "../libcli/auth/spnego.h"
+#include "smb_krb5.h"
+#include "../lib/util/asn1.h"
/*
- generate a negTokenInit packet given a GUID, a list of supported
+ parse a negTokenInit packet giving a GUID, a list of supported
OIDs (the mechanisms) and a principal name string
*/
-DATA_BLOB spnego_gen_negTokenInit(char guid[16],
- const char *OIDs[],
- const char *principal)
+bool spnego_parse_negTokenInit(TALLOC_CTX *ctx,
+ DATA_BLOB blob,
+ char *OIDs[ASN1_MAX_OIDS],
+ char **principal,
+ DATA_BLOB *secblob)
{
int i;
- ASN1_DATA data;
- DATA_BLOB ret;
-
- memset(&data, 0, sizeof(data));
-
- asn1_write(&data, guid, 16);
- asn1_push_tag(&data,ASN1_APPLICATION(0));
- asn1_write_OID(&data,OID_SPNEGO);
- asn1_push_tag(&data,ASN1_CONTEXT(0));
- asn1_push_tag(&data,ASN1_SEQUENCE(0));
+ bool ret = false;
+ ASN1_DATA *data;
- asn1_push_tag(&data,ASN1_CONTEXT(0));
- asn1_push_tag(&data,ASN1_SEQUENCE(0));
- for (i=0; OIDs[i]; i++) {
- asn1_write_OID(&data,OIDs[i]);
+ for (i = 0; i < ASN1_MAX_OIDS; i++) {
+ OIDs[i] = NULL;
}
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
- asn1_push_tag(&data, ASN1_CONTEXT(3));
- asn1_push_tag(&data, ASN1_SEQUENCE(0));
- asn1_push_tag(&data, ASN1_CONTEXT(0));
- asn1_write_GeneralString(&data,principal);
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
-
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
-
- asn1_pop_tag(&data);
-
- if (data.has_error) {
- DEBUG(1,("Failed to build negTokenInit at offset %d\n", (int)data.ofs));
- asn1_free(&data);
+ if (principal) {
+ *principal = NULL;
+ }
+ if (secblob) {
+ *secblob = data_blob_null;
}
- ret = data_blob(data.data, data.length);
- asn1_free(&data);
-
- return ret;
-}
-
-/*
- Generate a negTokenInit as used by the client side ... It has a mechType
- (OID), and a mechToken (a security blob) ...
-
- Really, we need to break out the NTLMSSP stuff as well, because it could be
- raw in the packets!
-*/
-DATA_BLOB gen_negTokenInit(const char *OID, DATA_BLOB blob)
-{
- ASN1_DATA data;
- DATA_BLOB ret;
-
- memset(&data, 0, sizeof(data));
-
- asn1_push_tag(&data, ASN1_APPLICATION(0));
- asn1_write_OID(&data,OID_SPNEGO);
- asn1_push_tag(&data, ASN1_CONTEXT(0));
- asn1_push_tag(&data, ASN1_SEQUENCE(0));
-
- asn1_push_tag(&data, ASN1_CONTEXT(0));
- asn1_push_tag(&data, ASN1_SEQUENCE(0));
- asn1_write_OID(&data, OID);
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
+ data = asn1_init(talloc_tos());
+ if (data == NULL) {
+ return false;
+ }
- asn1_push_tag(&data, ASN1_CONTEXT(2));
- asn1_write_OctetString(&data,blob.data,blob.length);
- asn1_pop_tag(&data);
+ if (!asn1_load(data, blob)) goto err;
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
+ if (!asn1_start_tag(data,ASN1_APPLICATION(0))) goto err;
- asn1_pop_tag(&data);
+ if (!asn1_check_OID(data,OID_SPNEGO)) goto err;
- if (data.has_error) {
- DEBUG(1,("Failed to build negTokenInit at offset %d\n", (int)data.ofs));
- asn1_free(&data);
- }
+ /* negTokenInit [0] NegTokenInit */
+ if (!asn1_start_tag(data,ASN1_CONTEXT(0))) goto err;
+ if (!asn1_start_tag(data,ASN1_SEQUENCE(0))) goto err;
- ret = data_blob(data.data, data.length);
- asn1_free(&data);
+ /* mechTypes [0] MechTypeList OPTIONAL */
- return ret;
-}
+ /* Not really optional, we depend on this to decide
+ * what mechanisms we have to work with. */
-/*
- parse a negTokenInit packet giving a GUID, a list of supported
- OIDs (the mechanisms) and a principal name string
-*/
-BOOL spnego_parse_negTokenInit(DATA_BLOB blob,
- char *OIDs[ASN1_MAX_OIDS],
- char **principal)
-{
- int i;
- BOOL ret;
- ASN1_DATA data;
-
- asn1_load(&data, blob);
-
- asn1_start_tag(&data,ASN1_APPLICATION(0));
- asn1_check_OID(&data,OID_SPNEGO);
- asn1_start_tag(&data,ASN1_CONTEXT(0));
- asn1_start_tag(&data,ASN1_SEQUENCE(0));
-
- asn1_start_tag(&data,ASN1_CONTEXT(0));
- asn1_start_tag(&data,ASN1_SEQUENCE(0));
- for (i=0; asn1_tag_remaining(&data) > 0 && i < ASN1_MAX_OIDS-1; i++) {
- char *oid_str = NULL;
- asn1_read_OID(&data,&oid_str);
- OIDs[i] = oid_str;
+ if (!asn1_start_tag(data,ASN1_CONTEXT(0))) goto err;
+ if (!asn1_start_tag(data,ASN1_SEQUENCE(0))) goto err;
+ for (i=0; asn1_tag_remaining(data) > 0 && i < ASN1_MAX_OIDS-1; i++) {
+ if (!asn1_read_OID(data,ctx, &OIDs[i])) {
+ goto err;
+ }
+ if (asn1_has_error(data)) {
+ goto err;
+ }
}
OIDs[i] = NULL;
- asn1_end_tag(&data);
- asn1_end_tag(&data);
-
- *principal = NULL;
- if (asn1_tag_remaining(&data) > 0) {
- asn1_start_tag(&data, ASN1_CONTEXT(3));
- asn1_start_tag(&data, ASN1_SEQUENCE(0));
- asn1_start_tag(&data, ASN1_CONTEXT(0));
- asn1_read_GeneralString(&data,principal);
- asn1_end_tag(&data);
- asn1_end_tag(&data);
- asn1_end_tag(&data);
- }
-
- asn1_end_tag(&data);
- asn1_end_tag(&data);
-
- asn1_end_tag(&data);
-
- ret = !data.has_error;
- if (data.has_error) {
- int j;
- SAFE_FREE(*principal);
- for(j = 0; j < i && j < ASN1_MAX_OIDS-1; j++) {
- SAFE_FREE(OIDs[j]);
+ if (!asn1_end_tag(data)) goto err;
+ if (!asn1_end_tag(data)) goto err;
+
+ /*
+ Win7 + Live Sign-in Assistant attaches a mechToken
+ ASN1_CONTEXT(2) to the negTokenInit packet
+ which breaks our negotiation if we just assume
+ the next tag is ASN1_CONTEXT(3).
+ */
+
+ if (asn1_peek_tag(data, ASN1_CONTEXT(1))) {
+ uint8_t flags;
+
+ /* reqFlags [1] ContextFlags OPTIONAL */
+ if (!asn1_start_tag(data, ASN1_CONTEXT(1))) goto err;
+ if (!asn1_start_tag(data, ASN1_BIT_STRING)) goto err;
+ while (asn1_tag_remaining(data) > 0) {
+ if (!asn1_read_uint8(data, &flags)) goto err;
+ }
+ if (!asn1_end_tag(data)) goto err;
+ if (!asn1_end_tag(data)) goto err;
+ }
+
+ if (asn1_peek_tag(data, ASN1_CONTEXT(2))) {
+ DATA_BLOB sblob = data_blob_null;
+ /* mechToken [2] OCTET STRING OPTIONAL */
+ if (!asn1_start_tag(data, ASN1_CONTEXT(2))) goto err;
+ if (!asn1_read_OctetString(data, ctx, &sblob)) goto err;
+ if (!asn1_end_tag(data)) {
+ data_blob_free(&sblob);
+ goto err;
+ }
+ if (secblob) {
+ *secblob = sblob;
+ } else {
+ data_blob_free(&sblob);
}
}
- asn1_free(&data);
- return ret;
-}
-
-/*
- generate a negTokenTarg packet given a list of OIDs and a security blob
-*/
-DATA_BLOB gen_negTokenTarg(const char *OIDs[], DATA_BLOB blob)
-{
- int i;
- ASN1_DATA data;
- DATA_BLOB ret;
-
- memset(&data, 0, sizeof(data));
-
- asn1_push_tag(&data, ASN1_APPLICATION(0));
- asn1_write_OID(&data,OID_SPNEGO);
- asn1_push_tag(&data, ASN1_CONTEXT(0));
- asn1_push_tag(&data, ASN1_SEQUENCE(0));
-
- asn1_push_tag(&data, ASN1_CONTEXT(0));
- asn1_push_tag(&data, ASN1_SEQUENCE(0));
- for (i=0; OIDs[i]; i++) {
- asn1_write_OID(&data,OIDs[i]);
- }
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
-
- asn1_push_tag(&data, ASN1_CONTEXT(2));
- asn1_write_OctetString(&data,blob.data,blob.length);
- asn1_pop_tag(&data);
-
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
-
- asn1_pop_tag(&data);
-
- if (data.has_error) {
- DEBUG(1,("Failed to build negTokenTarg at offset %d\n", (int)data.ofs));
- asn1_free(&data);
+ if (asn1_peek_tag(data, ASN1_CONTEXT(3))) {
+ char *princ = NULL;
+ /* mechListMIC [3] OCTET STRING OPTIONAL */
+ if (!asn1_start_tag(data, ASN1_CONTEXT(3))) goto err;
+ if (!asn1_start_tag(data, ASN1_SEQUENCE(0))) goto err;
+ if (!asn1_start_tag(data, ASN1_CONTEXT(0))) goto err;
+ if (!asn1_read_GeneralString(data, ctx, &princ)) goto err;
+ if (!asn1_end_tag(data)) goto err;
+ if (!asn1_end_tag(data)) goto err;
+ if (!asn1_end_tag(data)) goto err;
+ if (principal) {
+ *principal = princ;
+ } else {
+ TALLOC_FREE(princ);
+ }
}
- ret = data_blob(data.data, data.length);
- asn1_free(&data);
+ if (!asn1_end_tag(data)) goto err;
+ if (!asn1_end_tag(data)) goto err;
- return ret;
-}
+ if (!asn1_end_tag(data)) goto err;
-/*
- parse a negTokenTarg packet giving a list of OIDs and a security blob
-*/
-BOOL parse_negTokenTarg(DATA_BLOB blob, char *OIDs[ASN1_MAX_OIDS], DATA_BLOB *secblob)
-{
- int i;
- ASN1_DATA data;
-
- asn1_load(&data, blob);
- asn1_start_tag(&data, ASN1_APPLICATION(0));
- asn1_check_OID(&data,OID_SPNEGO);
- asn1_start_tag(&data, ASN1_CONTEXT(0));
- asn1_start_tag(&data, ASN1_SEQUENCE(0));
-
- asn1_start_tag(&data, ASN1_CONTEXT(0));
- asn1_start_tag(&data, ASN1_SEQUENCE(0));
- for (i=0; asn1_tag_remaining(&data) > 0 && i < ASN1_MAX_OIDS-1; i++) {
- char *oid_str = NULL;
- asn1_read_OID(&data,&oid_str);
- OIDs[i] = oid_str;
- }
- OIDs[i] = NULL;
- asn1_end_tag(&data);
- asn1_end_tag(&data);
+ ret = !asn1_has_error(data);
- asn1_start_tag(&data, ASN1_CONTEXT(2));
- asn1_read_OctetString(&data,secblob);
- asn1_end_tag(&data);
+ err:
- asn1_end_tag(&data);
- asn1_end_tag(&data);
-
- asn1_end_tag(&data);
-
- if (data.has_error) {
+ if (asn1_has_error(data)) {
int j;
- data_blob_free(secblob);
+ if (principal) {
+ TALLOC_FREE(*principal);
+ }
+ if (secblob) {
+ data_blob_free(secblob);
+ }
for(j = 0; j < i && j < ASN1_MAX_OIDS-1; j++) {
- SAFE_FREE(OIDs[j]);
+ TALLOC_FREE(OIDs[j]);
}
- DEBUG(1,("Failed to parse negTokenTarg at offset %d\n", (int)data.ofs));
- asn1_free(&data);
- return False;
}
- asn1_free(&data);
- return True;
-}
-
-/*
- generate a krb5 GSS-API wrapper packet given a ticket
-*/
-DATA_BLOB spnego_gen_krb5_wrap(const DATA_BLOB ticket, const uint8 tok_id[2])
-{
- ASN1_DATA data;
- DATA_BLOB ret;
-
- memset(&data, 0, sizeof(data));
-
- asn1_push_tag(&data, ASN1_APPLICATION(0));
- asn1_write_OID(&data, OID_KERBEROS5);
-
- asn1_write(&data, tok_id, 2);
- asn1_write(&data, ticket.data, ticket.length);
- asn1_pop_tag(&data);
-
- if (data.has_error) {
- DEBUG(1,("Failed to build krb5 wrapper at offset %d\n", (int)data.ofs));
- asn1_free(&data);
- }
-
- ret = data_blob(data.data, data.length);
- asn1_free(&data);
-
+ asn1_free(data);
return ret;
}
/*
- parse a krb5 GSS-API wrapper packet giving a ticket
-*/
-BOOL spnego_parse_krb5_wrap(DATA_BLOB blob, DATA_BLOB *ticket, uint8 tok_id[2])
-{
- BOOL ret;
- ASN1_DATA data;
- int data_remaining;
-
- asn1_load(&data, blob);
- asn1_start_tag(&data, ASN1_APPLICATION(0));
- asn1_check_OID(&data, OID_KERBEROS5);
-
- data_remaining = asn1_tag_remaining(&data);
-
- if (data_remaining < 3) {
- data.has_error = True;
- } else {
- asn1_read(&data, tok_id, 2);
- data_remaining -= 2;
- *ticket = data_blob(NULL, data_remaining);
- asn1_read(&data, ticket->data, ticket->length);
- }
-
- asn1_end_tag(&data);
-
- ret = !data.has_error;
-
- if (data.has_error) {
- data_blob_free(ticket);
- }
-
- asn1_free(&data);
-
- return ret;
-}
-
-
-/*
- generate a SPNEGO negTokenTarg packet, ready for a EXTENDED_SECURITY
- kerberos session setup
-*/
-int spnego_gen_negTokenTarg(const char *principal, int time_offset,
- DATA_BLOB *targ,
- DATA_BLOB *session_key_krb5, uint32 extra_ap_opts,
- time_t *expire_time)
-{
- int retval;
- DATA_BLOB tkt, tkt_wrapped;
- const char *krb_mechs[] = {OID_KERBEROS5_OLD, OID_NTLMSSP, NULL};
-
- /* get a kerberos ticket for the service and extract the session key */
- retval = cli_krb5_get_ticket(principal, time_offset,
- &tkt, session_key_krb5, extra_ap_opts, NULL,
- expire_time);
-
- if (retval)
- return retval;
-
- /* wrap that up in a nice GSS-API wrapping */
- tkt_wrapped = spnego_gen_krb5_wrap(tkt, TOK_ID_KRB_AP_REQ);
-
- /* and wrap that in a shiny SPNEGO wrapper */
- *targ = gen_negTokenTarg(krb_mechs, tkt_wrapped);
-
- data_blob_free(&tkt_wrapped);
- data_blob_free(&tkt);
-
- return retval;
-}
-
-
-/*
- parse a spnego NTLMSSP challenge packet giving two security blobs
-*/
-BOOL spnego_parse_challenge(const DATA_BLOB blob,
- DATA_BLOB *chal1, DATA_BLOB *chal2)
-{
- BOOL ret;
- ASN1_DATA data;
-
- ZERO_STRUCTP(chal1);
- ZERO_STRUCTP(chal2);
-
- asn1_load(&data, blob);
- asn1_start_tag(&data,ASN1_CONTEXT(1));
- asn1_start_tag(&data,ASN1_SEQUENCE(0));
-
- asn1_start_tag(&data,ASN1_CONTEXT(0));
- asn1_check_enumerated(&data,1);
- asn1_end_tag(&data);
-
- asn1_start_tag(&data,ASN1_CONTEXT(1));
- asn1_check_OID(&data, OID_NTLMSSP);
- asn1_end_tag(&data);
-
- asn1_start_tag(&data,ASN1_CONTEXT(2));
- asn1_read_OctetString(&data, chal1);
- asn1_end_tag(&data);
-
- /* the second challenge is optional (XP doesn't send it) */
- if (asn1_tag_remaining(&data)) {
- asn1_start_tag(&data,ASN1_CONTEXT(3));
- asn1_read_OctetString(&data, chal2);
- asn1_end_tag(&data);
- }
-
- asn1_end_tag(&data);
- asn1_end_tag(&data);
-
- ret = !data.has_error;
-
- if (data.has_error) {
- data_blob_free(chal1);
- data_blob_free(chal2);
- }
-
- asn1_free(&data);
- return ret;
-}
-
-
-/*
- generate a SPNEGO auth packet. This will contain the encrypted passwords
-*/
-DATA_BLOB spnego_gen_auth(DATA_BLOB blob)
-{
- ASN1_DATA data;
- DATA_BLOB ret;
-
- memset(&data, 0, sizeof(data));
-
- asn1_push_tag(&data, ASN1_CONTEXT(1));
- asn1_push_tag(&data, ASN1_SEQUENCE(0));
- asn1_push_tag(&data, ASN1_CONTEXT(2));
- asn1_write_OctetString(&data,blob.data,blob.length);
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
-
- ret = data_blob(data.data, data.length);
-
- asn1_free(&data);
-
- return ret;
-}
-
-/*
- parse a SPNEGO auth packet. This contains the encrypted passwords
+ generate a krb5 GSS-API wrapper packet given a ticket
*/
-BOOL spnego_parse_auth(DATA_BLOB blob, DATA_BLOB *auth)
+DATA_BLOB spnego_gen_krb5_wrap(TALLOC_CTX *ctx, const DATA_BLOB ticket, const uint8_t tok_id[2])
{
- ASN1_DATA data;
-
- asn1_load(&data, blob);
- asn1_start_tag(&data, ASN1_CONTEXT(1));
- asn1_start_tag(&data, ASN1_SEQUENCE(0));
- asn1_start_tag(&data, ASN1_CONTEXT(2));
- asn1_read_OctetString(&data,auth);
- asn1_end_tag(&data);
- asn1_end_tag(&data);
- asn1_end_tag(&data);
-
- if (data.has_error) {
- DEBUG(3,("spnego_parse_auth failed at %d\n", (int)data.ofs));
- data_blob_free(auth);
- asn1_free(&data);
- return False;
- }
-
- asn1_free(&data);
- return True;
-}
+ ASN1_DATA *data;
+ DATA_BLOB ret = data_blob_null;
-/*
- generate a minimal SPNEGO response packet. Doesn't contain much.
-*/
-DATA_BLOB spnego_gen_auth_response(DATA_BLOB *reply, NTSTATUS nt_status,
- const char *mechOID)
-{
- ASN1_DATA data;
- DATA_BLOB ret;
- uint8 negResult;
-
- if (NT_STATUS_IS_OK(nt_status)) {
- negResult = SPNEGO_NEG_RESULT_ACCEPT;
- } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- negResult = SPNEGO_NEG_RESULT_INCOMPLETE;
- } else {
- negResult = SPNEGO_NEG_RESULT_REJECT;
+ data = asn1_init(talloc_tos());
+ if (data == NULL) {
+ return data_blob_null;
}
- ZERO_STRUCT(data);
-
- asn1_push_tag(&data, ASN1_CONTEXT(1));
- asn1_push_tag(&data, ASN1_SEQUENCE(0));
- asn1_push_tag(&data, ASN1_CONTEXT(0));
- asn1_write_enumerated(&data, negResult);
- asn1_pop_tag(&data);
-
- if (reply->data != NULL) {
- asn1_push_tag(&data,ASN1_CONTEXT(1));
- asn1_write_OID(&data, mechOID);
- asn1_pop_tag(&data);
-
- asn1_push_tag(&data,ASN1_CONTEXT(2));
- asn1_write_OctetString(&data, reply->data, reply->length);
- asn1_pop_tag(&data);
- }
+ if (!asn1_push_tag(data, ASN1_APPLICATION(0))) goto err;
+ if (!asn1_write_OID(data, OID_KERBEROS5)) goto err;
- asn1_pop_tag(&data);
- asn1_pop_tag(&data);
+ if (!asn1_write(data, tok_id, 2)) goto err;
+ if (!asn1_write(data, ticket.data, ticket.length)) goto err;
+ if (!asn1_pop_tag(data)) goto err;
- ret = data_blob(data.data, data.length);
- asn1_free(&data);
- return ret;
-}
-
-/*
- parse a SPNEGO auth packet. This contains the encrypted passwords
-*/
-BOOL spnego_parse_auth_response(DATA_BLOB blob, NTSTATUS nt_status,
- const char *mechOID,
- DATA_BLOB *auth)
-{
- ASN1_DATA data;
- uint8 negResult;
-
- if (NT_STATUS_IS_OK(nt_status)) {
- negResult = SPNEGO_NEG_RESULT_ACCEPT;
- } else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- negResult = SPNEGO_NEG_RESULT_INCOMPLETE;
- } else {
- negResult = SPNEGO_NEG_RESULT_REJECT;
+ if (!asn1_extract_blob(data, ctx, &ret)) {
+ goto err;
}
- asn1_load(&data, blob);
- asn1_start_tag(&data, ASN1_CONTEXT(1));
- asn1_start_tag(&data, ASN1_SEQUENCE(0));
- asn1_start_tag(&data, ASN1_CONTEXT(0));
- asn1_check_enumerated(&data, negResult);
- asn1_end_tag(&data);
+ asn1_free(data);
+ data = NULL;
- *auth = data_blob(NULL,0);
+ err:
- if (asn1_tag_remaining(&data)) {
- asn1_start_tag(&data,ASN1_CONTEXT(1));
- asn1_check_OID(&data, mechOID);
- asn1_end_tag(&data);
-
- if (asn1_tag_remaining(&data)) {
- asn1_start_tag(&data,ASN1_CONTEXT(2));
- asn1_read_OctetString(&data, auth);
- asn1_end_tag(&data);
+ if (data != NULL) {
+ if (asn1_has_error(data)) {
+ DEBUG(1, ("Failed to build krb5 wrapper at offset %d\n",
+ (int)asn1_current_ofs(data)));
}
- } else if (negResult == SPNEGO_NEG_RESULT_INCOMPLETE) {
- data.has_error = 1;
- }
- asn1_end_tag(&data);
- asn1_end_tag(&data);
-
- if (data.has_error) {
- DEBUG(3,("spnego_parse_auth_response failed at %d\n", (int)data.ofs));
- asn1_free(&data);
- data_blob_free(auth);
- return False;
+ asn1_free(data);
}
- asn1_free(&data);
- return True;
+ return ret;
}
git.samba.org / sfrench / samba-autobuild / .git / blobdiff