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Update to Samba 4.6.3

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Guenther
This commit is contained in:
Günther Deschner 2017-04-25 09:37:08 +02:00
parent 7f131bf7c1
commit ab3017b1bf
6 changed files with 8 additions and 783 deletions
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2
.gitignore vendored
View File

@ -87,3 +87,5 @@ samba-3.6.0pre1.tar.gz
/samba-4.6.1.tar.asc /samba-4.6.1.tar.asc
/samba-4.6.2.tar.xz /samba-4.6.2.tar.xz
/samba-4.6.2.tar.asc /samba-4.6.2.tar.asc
/samba-4.6.3.tar.xz
/samba-4.6.3.tar.asc

54
samba-v4.6-credentials-fix-realm.patch
View File

@ -1,54 +0,0 @@
commit 4dc389c6ae95b7bd34e762b5362c8a79fbda7c7c
Author: Andreas Schneider <asn@samba.org>
Date: Wed Dec 21 22:17:22 2016 +0100
auth/credentials: Always set the the realm if we set the principal from the ccache
This fixes a bug in gensec_gssapi_client_start() where an invalid realm
is used to get a Kerberos ticket.
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit 30c07065300281e3a67197fe39ed928346480ff7)
diff --git a/auth/credentials/credentials_krb5.c b/auth/credentials/credentials_krb5.c
index 0e68012..1912c48 100644
--- a/auth/credentials/credentials_krb5.c
+++ b/auth/credentials/credentials_krb5.c
@@ -107,7 +107,8 @@ static int cli_credentials_set_from_ccache(struct cli_credentials *cred,
enum credentials_obtained obtained,
const char **error_string)
{
-
+ bool ok;
+ char *realm;
krb5_principal princ;
krb5_error_code ret;
char *name;
@@ -134,11 +135,24 @@ static int cli_credentials_set_from_ccache(struct cli_credentials *cred,
return ret;
}
- cli_credentials_set_principal(cred, name, obtained);
-
+ ok = cli_credentials_set_principal(cred, name, obtained);
+ if (!ok) {
+ krb5_free_principal(ccache->smb_krb5_context->krb5_context, princ);
+ return ENOMEM;
+ }
free(name);
+ realm = smb_krb5_principal_get_realm(ccache->smb_krb5_context->krb5_context,
+ princ);
krb5_free_principal(ccache->smb_krb5_context->krb5_context, princ);
+ if (realm == NULL) {
+ return ENOMEM;
+ }
+ ok = cli_credentials_set_realm(cred, realm, obtained);
+ SAFE_FREE(realm);
+ if (!ok) {
+ return ENOMEM;
+ }
/* set the ccache_obtained here, as it just got set to UNINITIALISED by the calls above */
cred->ccache_obtained = obtained;

543
samba-v4.6-gss_krb5_import_cred.patch
View File

@ -1,543 +0,0 @@
From 334a4870cbbfefcd09c10f432a320ceaac29a14a Mon Sep 17 00:00:00 2001
From: Alexander Bokovoy <ab@samba.org>
Date: Fri, 3 Mar 2017 17:08:09 +0200
Subject: [PATCH 1/6] gssapi: check for gss_acquire_cred_from
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12611
Signed-off-by: Alexander Bokovoy <ab@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit d630a364f9d74443e482934f76cd7107c331e108)
---
wscript_configure_system_mitkrb5 | 1 +
1 file changed, 1 insertion(+)
diff --git a/wscript_configure_system_mitkrb5 b/wscript_configure_system_mitkrb5
index 06a9821..d3e8ebf 100644
--- a/wscript_configure_system_mitkrb5
+++ b/wscript_configure_system_mitkrb5
@@ -92,6 +92,7 @@ conf.CHECK_FUNCS_IN('''
gsskrb5_extract_authz_data_from_sec_context
gss_krb5_export_lucid_sec_context
gss_import_cred gss_export_cred
+ gss_acquire_cred_from
''', 'gssapi gssapi_krb5')
conf.CHECK_VARIABLE('GSS_KRB5_CRED_NO_CI_FLAGS_X', headers=possible_gssapi_headers)
conf.CHECK_FUNCS_IN('krb5_mk_req_extended krb5_kt_compare', 'krb5')
--
2.9.3
From 4b4a95436a56ee91e6bef8e905656c387ce2f62c Mon Sep 17 00:00:00 2001
From: Alexander Bokovoy <ab@samba.org>
Date: Fri, 3 Mar 2017 16:14:57 +0200
Subject: [PATCH 2/6] lib/krb5_wrap: add smb_gss_krb5_import_cred wrapper
Wrap gss_krb5_import_cred() to allow re-implementing it with
gss_acquire_cred_from() for newer MIT versions. gss_acquire_cred_from()
works fine with GSSAPI interposer (GSS-proxy) while
gss_krb5_import_cred() is not interposed yet.
The wrapper has additional parameter, krb5_context handle, to facilitate
with credentials cache name discovery. All our callers to
gss_krb5_import_cred() already have krb5 context handy.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12611
Signed-off-by: Alexander Bokovoy <ab@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit 0e6e8dd2600c699a7a02e3d11fed21b5bc49858d)
---
lib/krb5_wrap/gss_samba.c | 121 ++++++++++++++++++++++++++++++++++++++++++++++
lib/krb5_wrap/gss_samba.h | 13 +++++
2 files changed, 134 insertions(+)
diff --git a/lib/krb5_wrap/gss_samba.c b/lib/krb5_wrap/gss_samba.c
index b444633..757ffc5 100644
--- a/lib/krb5_wrap/gss_samba.c
+++ b/lib/krb5_wrap/gss_samba.c
@@ -48,4 +48,125 @@ int smb_gss_oid_equal(const gss_OID first_oid, const gss_OID second_oid)
}
#endif /* !HAVE_GSS_OID_EQUAL */
+
+/* wrapper around gss_krb5_import_cred() that prefers to use gss_acquire_cred_from()
+ * if this GSSAPI extension is available. gss_acquire_cred_from() is properly
+ * interposed by GSSPROXY while gss_krb5_import_cred() is not.
+ *
+ * This wrapper requires a proper krb5_context to resolve ccache name.
+ * All gss_krb5_import_cred() callers in Samba already have krb5_context available. */
+uint32_t smb_gss_krb5_import_cred(uint32_t *minor_status, krb5_context ctx,
+ krb5_ccache id, krb5_principal keytab_principal,
+ krb5_keytab keytab, gss_cred_id_t *cred)
+{
+ uint32_t major_status = 0;
+
+#if HAVE_GSS_ACQUIRE_CRED_FROM
+ uint32_t minor = 0;
+ gss_key_value_element_desc ccache_element = {
+ .key = "ccache",
+ .value = NULL,
+ };
+
+ gss_key_value_element_desc keytab_element = {
+ .key = "keytab",
+ .value = NULL,
+ };
+
+ gss_key_value_element_desc elements[2];
+
+ gss_key_value_set_desc cred_store = {
+ .elements = &ccache_element,
+ .count = 1,
+ };
+
+ gss_OID_set mech_set = GSS_C_NO_OID_SET;
+ gss_cred_usage_t cred_usage = GSS_C_INITIATE;
+ gss_name_t name = NULL;
+ gss_buffer_desc pr_name = {
+ .value = NULL,
+ .length = 0,
+ };
+
+ if (id != NULL) {
+ major_status = krb5_cc_get_full_name(ctx,
+ id,
+ discard_const(&ccache_element.value));
+ if (major_status != 0) {
+ return major_status;
+ }
+ }
+
+ if (keytab != NULL) {
+ keytab_element.value = malloc(4096);
+ if (!keytab_element.value) {
+ return ENOMEM;
+ }
+ major_status = krb5_kt_get_name(ctx,
+ keytab,
+ discard_const(keytab_element.value), 4096);
+ if (major_status != 0) {
+ free(discard_const(keytab_element.value));
+ return major_status;
+ }
+ cred_usage = GSS_C_ACCEPT;
+ cred_store.elements = &keytab_element;
+
+ if (keytab_principal != NULL) {
+ major_status = krb5_unparse_name(ctx, keytab_principal, (char**)&pr_name.value);
+ if (major_status != 0) {
+ free(discard_const(keytab_element.value));
+ return major_status;
+ }
+ pr_name.length = strlen(pr_name.value);
+
+ major_status = gss_import_name(minor_status,
+ &pr_name,
+ discard_const(GSS_KRB5_NT_PRINCIPAL_NAME),
+ &name);
+ if (major_status != 0) {
+ krb5_free_unparsed_name(ctx, pr_name.value);
+ free(discard_const(keytab_element.value));
+ return major_status;
+ }
+ }
+ }
+
+ if (id != NULL && keytab != NULL) {
+ elements[0] = ccache_element;
+ elements[1] = keytab_element;
+
+ cred_store.elements = elements;
+ cred_store.count = 2;
+ cred_usage = GSS_C_BOTH;
+ }
+
+ major_status = gss_acquire_cred_from(minor_status,
+ name,
+ 0,
+ mech_set,
+ cred_usage,
+ &cred_store,
+ cred,
+ NULL,
+ NULL);
+
+ if (pr_name.value != NULL) {
+ (void)gss_release_name(&minor, &name);
+ krb5_free_unparsed_name(ctx, pr_name.value);
+ }
+ if (keytab_element.value != NULL) {
+ free(discard_const(keytab_element.value));
+ }
+ krb5_free_string(ctx, discard_const(ccache_element.value));
+#else
+ major_status = gss_krb5_import_cred(minor_status,
+ id,
+ keytab_principal,
+ keytab, cred);
+#endif
+ return major_status;
+}
+
+
#endif /* HAVE_GSSAPI */
diff --git a/lib/krb5_wrap/gss_samba.h b/lib/krb5_wrap/gss_samba.h
index 5319932..89aee34 100644
--- a/lib/krb5_wrap/gss_samba.h
+++ b/lib/krb5_wrap/gss_samba.h
@@ -25,6 +25,7 @@
#ifdef HAVE_GSSAPI
#include "system/gssapi.h"
+#include "krb5_samba.h"
#if defined(HAVE_GSS_OID_EQUAL)
#define smb_gss_oid_equal gss_oid_equal
@@ -32,5 +33,17 @@
int smb_gss_oid_equal(const gss_OID first_oid, const gss_OID second_oid);
#endif /* HAVE_GSS_OID_EQUAL */
+/* wrapper around gss_krb5_import_cred() that prefers to use gss_acquire_cred_from()
+ * if this GSSAPI extension is available. gss_acquire_cred_from() is properly
+ * interposed by GSS-proxy while gss_krb5_import_cred() is not.
+ *
+ * This wrapper requires a proper krb5_context to resolve the ccache name for
+ * gss_acquire_cred_from().
+ *
+ * All gss_krb5_import_cred() callers in Samba already have krb5_context available. */
+uint32_t smb_gss_krb5_import_cred(OM_uint32 *minor_status, krb5_context ctx,
+ krb5_ccache id, krb5_principal keytab_principal,
+ krb5_keytab keytab, gss_cred_id_t *cred);
+
#endif /* HAVE_GSSAPI */
#endif /* _GSS_SAMBA_H */
--
2.9.3
From f06fafce32a27acf4028ab573297c64189b62e30 Mon Sep 17 00:00:00 2001
From: Alexander Bokovoy <ab@samba.org>
Date: Fri, 3 Mar 2017 16:57:13 +0200
Subject: [PATCH 3/6] credentials_krb5: convert to use smb_gss_krb5_import_cred
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12611
Signed-off-by: Alexander Bokovoy <ab@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit ca8fd793930173b4e625d3f286739de214155bc1)
---
auth/credentials/credentials_krb5.c | 22 +++++++++++++---------
1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/auth/credentials/credentials_krb5.c b/auth/credentials/credentials_krb5.c
index e974df9..0e68012 100644
--- a/auth/credentials/credentials_krb5.c
+++ b/auth/credentials/credentials_krb5.c
@@ -579,8 +579,9 @@ _PUBLIC_ int cli_credentials_get_client_gss_creds(struct cli_credentials *cred,
return ENOMEM;
}
- maj_stat = gss_krb5_import_cred(&min_stat, ccache->ccache, NULL, NULL,
- &gcc->creds);
+ maj_stat = smb_gss_krb5_import_cred(&min_stat, ccache->smb_krb5_context->krb5_context,
+ ccache->ccache, NULL, NULL,
+ &gcc->creds);
if ((maj_stat == GSS_S_FAILURE) &&
(min_stat == (OM_uint32)KRB5_CC_END ||
min_stat == (OM_uint32)KRB5_CC_NOTFOUND ||
@@ -597,8 +598,9 @@ _PUBLIC_ int cli_credentials_get_client_gss_creds(struct cli_credentials *cred,
return ret;
}
- maj_stat = gss_krb5_import_cred(&min_stat, ccache->ccache, NULL, NULL,
- &gcc->creds);
+ maj_stat = smb_gss_krb5_import_cred(&min_stat, ccache->smb_krb5_context->krb5_context,
+ ccache->ccache, NULL, NULL,
+ &gcc->creds);
}
@@ -609,7 +611,7 @@ _PUBLIC_ int cli_credentials_get_client_gss_creds(struct cli_credentials *cred,
} else {
ret = EINVAL;
}
- (*error_string) = talloc_asprintf(cred, "gss_krb5_import_cred failed: %s", error_message(ret));
+ (*error_string) = talloc_asprintf(cred, "smb_gss_krb5_import_cred failed: %s", error_message(ret));
return ret;
}
@@ -1076,12 +1078,14 @@ _PUBLIC_ int cli_credentials_get_server_gss_creds(struct cli_credentials *cred,
if (ktc->password_based || obtained < CRED_SPECIFIED) {
/* This creates a GSSAPI cred_id_t for match-by-key with only the keytab set */
- maj_stat = gss_krb5_import_cred(&min_stat, NULL, NULL, ktc->keytab,
- &gcc->creds);
+ maj_stat = smb_gss_krb5_import_cred(&min_stat, smb_krb5_context->krb5_context,
+ NULL, NULL, ktc->keytab,
+ &gcc->creds);
} else {
/* This creates a GSSAPI cred_id_t with the principal and keytab set, matching by name */
- maj_stat = gss_krb5_import_cred(&min_stat, NULL, princ, ktc->keytab,
- &gcc->creds);
+ maj_stat = smb_gss_krb5_import_cred(&min_stat, smb_krb5_context->krb5_context,
+ NULL, princ, ktc->keytab,
+ &gcc->creds);
}
if (maj_stat) {
if (min_stat) {
--
2.9.3
From 5305bffd4c72a85cc6c3148222ef7e346cbe3d87 Mon Sep 17 00:00:00 2001
From: Alexander Bokovoy <ab@samba.org>
Date: Fri, 3 Mar 2017 16:57:50 +0200
Subject: [PATCH 4/6] libads: convert to use smb_gss_krb5_import_cred
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12611
Signed-off-by: Alexander Bokovoy <ab@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit 520167992bd2477bc11920d2dc9ec87f2cb339c9)
---
source3/libads/sasl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/source3/libads/sasl.c b/source3/libads/sasl.c
index 8570788..30127fa 100644
--- a/source3/libads/sasl.c
+++ b/source3/libads/sasl.c
@@ -372,7 +372,7 @@ static ADS_STATUS ads_init_gssapi_cred(ADS_STRUCT *ads, gss_cred_id_t *cred)
goto done;
}
- maj = gss_krb5_import_cred(&min, kccache, NULL, NULL, cred);
+ maj = smb_gss_krb5_import_cred(&min, kctx, kccache, NULL, NULL, cred);
if (maj != GSS_S_COMPLETE) {
status = ADS_ERROR_GSS(maj, min);
goto done;
--
2.9.3
From 1dbc68f9bee19a9c26825cc5be7d81951dcac710 Mon Sep 17 00:00:00 2001
From: Alexander Bokovoy <ab@samba.org>
Date: Fri, 3 Mar 2017 16:58:14 +0200
Subject: [PATCH 5/6] s3-gse: convert to use smb_gss_krb5_import_cred
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12611
Signed-off-by: Alexander Bokovoy <ab@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit 3d733d5791a6d82edda13ac39790bd8ba893f3d7)
---
source3/librpc/crypto/gse.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)
diff --git a/source3/librpc/crypto/gse.c b/source3/librpc/crypto/gse.c
index abf20bc..f4238f3 100644
--- a/source3/librpc/crypto/gse.c
+++ b/source3/librpc/crypto/gse.c
@@ -252,11 +252,12 @@ static NTSTATUS gse_init_client(TALLOC_CTX *mem_ctx,
/* TODO: get krb5 ticket using username/password, if no valid
* one already available in ccache */
- gss_maj = gss_krb5_import_cred(&gss_min,
- gse_ctx->ccache,
- NULL, /* keytab_principal */
- NULL, /* keytab */
- &gse_ctx->creds);
+ gss_maj = smb_gss_krb5_import_cred(&gss_min,
+ gse_ctx->k5ctx,
+ gse_ctx->ccache,
+ NULL, /* keytab_principal */
+ NULL, /* keytab */
+ &gse_ctx->creds);
if (gss_maj) {
char *ccache = NULL;
int kret;
@@ -268,7 +269,7 @@ static NTSTATUS gse_init_client(TALLOC_CTX *mem_ctx,
ccache = NULL;
}
- DEBUG(5, ("gss_krb5_import_cred ccache[%s] failed with [%s] -"
+ DEBUG(5, ("smb_gss_krb5_import_cred ccache[%s] failed with [%s] -"
"the caller may retry after a kinit.\n",
ccache, gse_errstr(gse_ctx, gss_maj, gss_min)));
SAFE_FREE(ccache);
@@ -430,12 +431,13 @@ static NTSTATUS gse_init_server(TALLOC_CTX *mem_ctx,
}
/* This creates a GSSAPI cred_id_t with the keytab set */
- gss_maj = gss_krb5_import_cred(&gss_min, NULL, NULL, gse_ctx->keytab,
- &gse_ctx->creds);
+ gss_maj = smb_gss_krb5_import_cred(&gss_min, gse_ctx->k5ctx,
+ NULL, NULL, gse_ctx->keytab,
+ &gse_ctx->creds);
if (gss_maj != 0
&& gss_maj != (GSS_S_CALL_BAD_STRUCTURE|GSS_S_BAD_NAME)) {
- DEBUG(0, ("gss_krb5_import_cred failed with [%s]\n",
+ DEBUG(0, ("smb_gss_krb5_import_cred failed with [%s]\n",
gse_errstr(gse_ctx, gss_maj, gss_min)));
status = NT_STATUS_INTERNAL_ERROR;
goto done;
--
2.9.3
From 3c9390d26cf12e483d98f005b43da7b10348753d Mon Sep 17 00:00:00 2001
From: Alexander Bokovoy <ab@samba.org>
Date: Wed, 8 Mar 2017 12:38:49 +0200
Subject: [PATCH 6/6] s3-gse: move krb5 fallback to smb_gss_krb5_import_cred
wrapper
MIT krb5 1.9 version of gss_krb5_import_cred() may fail when importing
credentials from a keytab without specifying actual principal.
This was fixed in MIT krb5 1.9.2 (see commit
71c3be093db577aa52f6b9a9a3a9f442ca0d8f20 in MIT krb5-1.9 branch, git
master's version is bd18687a705a8a6cdcb7c140764d1a7c6a3381b5).
Move fallback code to the smb_gss_krb5_import_cred wrapper. We only
expect this fallback to happen with krb5 GSSAPI mechanism, thus hard
code use of krb5 mech when calling to gss_acquire_cred.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12611
Signed-off-by: Alexander Bokovoy <ab@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Alexander Bokovoy <ab@samba.org>
Autobuild-Date(master): Wed Mar 8 22:00:24 CET 2017 on sn-devel-144
(cherry picked from commit 57286d57732d49fdb8b8e21f584787cdbc917c32)
---
lib/krb5_wrap/gss_samba.c | 46 +++++++++++++++++++++++++++++++++++++++---
source3/librpc/crypto/gse.c | 49 +--------------------------------------------
2 files changed, 44 insertions(+), 51 deletions(-)
diff --git a/lib/krb5_wrap/gss_samba.c b/lib/krb5_wrap/gss_samba.c
index 757ffc5..9e5ad4a 100644
--- a/lib/krb5_wrap/gss_samba.c
+++ b/lib/krb5_wrap/gss_samba.c
@@ -161,9 +161,49 @@ uint32_t smb_gss_krb5_import_cred(uint32_t *minor_status, krb5_context ctx,
krb5_free_string(ctx, discard_const(ccache_element.value));
#else
major_status = gss_krb5_import_cred(minor_status,
- id,
- keytab_principal,
- keytab, cred);
+ id,
+ keytab_principal,
+ keytab, cred);
+
+ if (major_status == (GSS_S_CALL_BAD_STRUCTURE|GSS_S_BAD_NAME)) {
+ if ((keytab_principal == NULL) && (keytab != NULL)) {
+ /* No principal was specified and MIT krb5 1.9 version failed.
+ * We have to fall back to set global acceptor identity */
+ gss_OID_set_desc mech_set;
+ char *kt_name = NULL;
+
+ kt_name = malloc(4096);
+ if (!kt_name) {
+ return ENOMEM;
+ }
+
+ major_status = krb5_kt_get_name(ctx,
+ keytab,
+ kt_name, 4096);
+ if (major_status != 0) {
+ free(kt_name);
+ return major_status;
+ }
+
+ major_status = gsskrb5_register_acceptor_identity(kt_name);
+ if (major_status) {
+ free(kt_name);
+ return major_status;
+ }
+
+ /* We are dealing with krb5 GSSAPI mech in this fallback */
+ mech_set.count = 1;
+ mech_set.elements = gss_mech_krb5;
+ major_status = gss_acquire_cred(minor_status,
+ GSS_C_NO_NAME,
+ GSS_C_INDEFINITE,
+ &mech_set,
+ GSS_C_ACCEPT,
+ cred,
+ NULL, NULL);
+ free(kt_name);
+ }
+ }
#endif
return major_status;
}
diff --git a/source3/librpc/crypto/gse.c b/source3/librpc/crypto/gse.c
index f4238f3..a111320 100644
--- a/source3/librpc/crypto/gse.c
+++ b/source3/librpc/crypto/gse.c
@@ -435,58 +435,11 @@ static NTSTATUS gse_init_server(TALLOC_CTX *mem_ctx,
NULL, NULL, gse_ctx->keytab,
&gse_ctx->creds);
- if (gss_maj != 0
- && gss_maj != (GSS_S_CALL_BAD_STRUCTURE|GSS_S_BAD_NAME)) {
+ if (gss_maj != 0) {
DEBUG(0, ("smb_gss_krb5_import_cred failed with [%s]\n",
gse_errstr(gse_ctx, gss_maj, gss_min)));
status = NT_STATUS_INTERNAL_ERROR;
goto done;
-
- /* This is the error the MIT krb5 1.9 gives when it
- * implements the function, but we do not specify the
- * principal. However, when we specify the principal
- * as host$@REALM the GSS acceptor fails with 'wrong
- * principal in request'. Work around the issue by
- * falling back to the alternate approach below. */
- } else if (gss_maj == (GSS_S_CALL_BAD_STRUCTURE|GSS_S_BAD_NAME))
- /* FIXME!!!
- * This call sets the default keytab for the whole server, not
- * just for this context. Need to find a way that does not alter
- * the state of the whole server ... */
- {
- const char *ktname;
- gss_OID_set_desc mech_set;
-
- ret = smb_krb5_kt_get_name(gse_ctx, gse_ctx->k5ctx,
- gse_ctx->keytab, &ktname);
- if (ret) {
- status = NT_STATUS_INTERNAL_ERROR;
- goto done;
- }
-
- ret = gsskrb5_register_acceptor_identity(ktname);
- if (ret) {
- status = NT_STATUS_INTERNAL_ERROR;
- goto done;
- }
-
- mech_set.count = 1;
- mech_set.elements = &gse_ctx->gss_mech;
-
- gss_maj = gss_acquire_cred(&gss_min,
- GSS_C_NO_NAME,
- GSS_C_INDEFINITE,
- &mech_set,
- GSS_C_ACCEPT,
- &gse_ctx->creds,
- NULL, NULL);
-
- if (gss_maj) {
- DEBUG(0, ("gss_acquire_creds failed with [%s]\n",
- gse_errstr(gse_ctx, gss_maj, gss_min)));
- status = NT_STATUS_INTERNAL_ERROR;
- goto done;
- }
}
status = NT_STATUS_OK;
--
2.9.3

179
samba-v4.6-lib-crypto-implement-samba.crypto-Python-module-for-.patch
View File

@ -1,179 +0,0 @@
From 8a696458dac335071d98f39dfd1380192fbe7733 Mon Sep 17 00:00:00 2001
From: Alexander Bokovoy <ab@samba.org>
Date: Fri, 10 Mar 2017 16:20:06 +0200
Subject: [PATCH] lib/crypto: implement samba.crypto Python module for RC4
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Implement a small Python module that exposes arcfour_crypt_blob()
function widely used in Samba C code.
When Samba Python bindings are used to call LSA CreateTrustedDomainEx2,
there is a need to encrypt trusted credentials with RC4 cipher.
Current Samba Python code relies on Python runtime to provide RC4
cipher. However, in FIPS 140-2 mode system crypto libraries do not
provide access RC4 cipher at all. According to Microsoft dochelp team,
Windows is treating AuthenticationInformation blob encryption as 'plain
text' in terms of FIPS 140-2, thus doing application-level encryption.
Replace samba.arcfour_encrypt() implementation with a call to
samba.crypto.arcfour_crypt_blob().
Signed-off-by: Alexander Bokovoy <ab@samba.org>
Reviewed-by: Simo Sorce <idra@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
Autobuild-User(master): Günther Deschner <gd@samba.org>
Autobuild-Date(master): Wed Mar 15 01:30:24 CET 2017 on sn-devel-144
(cherry picked from commit bbeef554f2c15e739f6095fcb57d9ef6646b411c)
---
lib/crypto/py_crypto.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++
lib/crypto/wscript_build | 7 ++++
python/samba/__init__.py | 16 ++-------
3 files changed, 99 insertions(+), 14 deletions(-)
create mode 100644 lib/crypto/py_crypto.c
diff --git a/lib/crypto/py_crypto.c b/lib/crypto/py_crypto.c
new file mode 100644
index 0000000..bf7f9f4
--- /dev/null
+++ b/lib/crypto/py_crypto.c
@@ -0,0 +1,90 @@
+/*
+ Unix SMB/CIFS implementation.
+ Samba crypto functions
+
+ Copyright (C) Alexander Bokovoy <ab@samba.org> 2017
+
+ 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 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Python.h>
+#include "includes.h"
+#include "python/py3compat.h"
+#include "lib/crypto/arcfour.h"
+
+static PyObject *py_crypto_arcfour_crypt_blob(PyObject *module, PyObject *args, PyObject *kwargs)
+{
+ DATA_BLOB data, key;
+ PyObject *py_data, *py_key, *result;
+ TALLOC_CTX *ctx;
+
+ if (!PyArg_ParseTuple(args, "OO", &py_data, &py_key))
+ return NULL;
+
+ if (!PyBytes_Check(py_data)) {
+ PyErr_Format(PyExc_TypeError, "bytes expected");
+ return NULL;
+ }
+
+ if (!PyBytes_Check(py_key)) {
+ PyErr_Format(PyExc_TypeError, "bytes expected");
+ return NULL;
+ }
+
+ ctx = talloc_new(NULL);
+
+ data.length = PyBytes_Size(py_data);
+ data.data = talloc_memdup(ctx, PyBytes_AsString(py_data), data.length);
+ if (!data.data) {
+ talloc_free(ctx);
+ return PyErr_NoMemory();
+ }
+
+ key.data = (uint8_t *)PyBytes_AsString(py_key);
+ key.length = PyBytes_Size(py_key);
+
+ arcfour_crypt_blob(data.data, data.length, &key);
+
+ result = PyBytes_FromStringAndSize((const char*) data.data, data.length);
+ talloc_free(ctx);
+ return result;
+}
+
+
+static const char py_crypto_arcfour_crypt_blob_doc[] = "arcfour_crypt_blob(data, key)\n"
+ "Encrypt the data with RC4 algorithm using the key";
+
+static PyMethodDef py_crypto_methods[] = {
+ { "arcfour_crypt_blob", (PyCFunction)py_crypto_arcfour_crypt_blob, METH_VARARGS, py_crypto_arcfour_crypt_blob_doc },
+ { NULL },
+};
+
+static struct PyModuleDef moduledef = {
+ PyModuleDef_HEAD_INIT,
+ .m_name = "crypto",
+ .m_doc = "Crypto functions required for SMB",
+ .m_size = -1,
+ .m_methods = py_crypto_methods,
+};
+
+MODULE_INIT_FUNC(crypto)
+{
+ PyObject *m;
+
+ m = PyModule_Create(&moduledef);
+ if (m == NULL)
+ return NULL;
+
+ return m;
+}
diff --git a/lib/crypto/wscript_build b/lib/crypto/wscript_build
index 7f94532..d1f152e 100644
--- a/lib/crypto/wscript_build
+++ b/lib/crypto/wscript_build
@@ -25,3 +25,10 @@ bld.SAMBA_SUBSYSTEM('TORTURE_LIBCRYPTO',
autoproto='test_proto.h',
deps='LIBCRYPTO'
)
+
+for env in bld.gen_python_environments():
+ bld.SAMBA_PYTHON('python_crypto',
+ source='py_crypto.c',
+ deps='LIBCRYPTO',
+ realname='samba/crypto.so'
+ )
diff --git a/python/samba/__init__.py b/python/samba/__init__.py
index 19d5e38..fa4244a 100644
--- a/python/samba/__init__.py
+++ b/python/samba/__init__.py
@@ -371,20 +371,8 @@ def string_to_byte_array(string):
return blob
def arcfour_encrypt(key, data):
- try:
- from Crypto.Cipher import ARC4
- c = ARC4.new(key)
- return c.encrypt(data)
- except ImportError as e:
- pass
- try:
- from M2Crypto.RC4 import RC4
- c = RC4(key)
- return c.update(data)
- except ImportError as e:
- pass
- raise Exception("arcfour_encrypt() requires " +
- "python*-crypto or python*-m2crypto or m2crypto")
+ from samba.crypto import arcfour_crypt_blob
+ return arcfour_crypt_blob(data, key)
import _glue
version = _glue.version
--
2.9.3

9
samba.spec
View File

@ -8,7 +8,7 @@
%define main_release 0 %define main_release 0
%define samba_version 4.6.2 %define samba_version 4.6.3
%define talloc_version 2.1.9 %define talloc_version 2.1.9
%define tdb_version 1.3.12 %define tdb_version 1.3.12
%define tevent_version 0.9.31 %define tevent_version 0.9.31
@ -113,10 +113,6 @@ Source14: samba.pamd
Source200: README.dc Source200: README.dc
Source201: README.downgrade Source201: README.downgrade
Patch0: samba-v4.6-gss_krb5_import_cred.patch
Patch1: samba-v4.6-credentials-fix-realm.patch
Patch2: samba-v4.6-lib-crypto-implement-samba.crypto-Python-module-for-.patch
Requires(pre): /usr/sbin/groupadd Requires(pre): /usr/sbin/groupadd
Requires(post): systemd Requires(post): systemd
Requires(preun): systemd Requires(preun): systemd
@ -2636,6 +2632,9 @@ rm -rf %{buildroot}
%endif # with_clustering_support %endif # with_clustering_support
%changelog %changelog
* Tue Apr 25 2017 Guenther Deschner <gdeschner@redhat.com> - 4.6.3-0
- Update to Samba 4.6.3
* Fri Mar 31 2017 Guenther Deschner <gdeschner@redhat.com> - 4.6.2-0 * Fri Mar 31 2017 Guenther Deschner <gdeschner@redhat.com> - 4.6.2-0
- Update to Samba 4.6.2 - Update to Samba 4.6.2
- related: #1435156 - Security fix for CVE-2017-2619 - related: #1435156 - Security fix for CVE-2017-2619

4
sources
View File

@ -1,2 +1,2 @@
SHA512 (samba-4.6.2.tar.xz) = 73cb1c7b08229d398d8b4e96583e5c708f3627dd143061e4baf34ede05dad7beb473c713a0ba1903d4aa09641669de87b949b7c28baea10038ff310158f6bac4 SHA512 (samba-4.6.3.tar.xz) = f8ad8227cc59854dc2c482949d5581771628ec7e4582a896fba5a0bd278ed4e0193a5e5ab14bf2e93ac864e0dd5bd21e5e7c6a07f4dc0ca3d424f2d2fda5389b
SHA512 (samba-4.6.2.tar.asc) = 0811c0a13abd687c0fa1f2e16c52ea041435b7c60ce30e8cb399b2e8f38ed443e5b45525be38457238807fba6a0307364f834747d6da407567c6aac9b3a34c58 SHA512 (samba-4.6.3.tar.asc) = f83631ebead9c2a1674f34f08f0f6721c1eeafdb574f0e4b386fbec22714b3e371598f9b4a2331ddd37d10382d2e2469db8fd6e0380be7dacd8f5f82dd66bcf5