summaryrefslogtreecommitdiffstats
path: root/meta/recipes-extended/pam/libpam/pam-unix-nullok-secure.patch
diff options
context:
space:
mode:
Diffstat (limited to 'meta/recipes-extended/pam/libpam/pam-unix-nullok-secure.patch')
-rw-r--r--meta/recipes-extended/pam/libpam/pam-unix-nullok-secure.patch222
1 files changed, 222 insertions, 0 deletions
diff --git a/meta/recipes-extended/pam/libpam/pam-unix-nullok-secure.patch b/meta/recipes-extended/pam/libpam/pam-unix-nullok-secure.patch
new file mode 100644
index 0000000000..b285e96c27
--- /dev/null
+++ b/meta/recipes-extended/pam/libpam/pam-unix-nullok-secure.patch
@@ -0,0 +1,222 @@
1Debian patch to add a new 'nullok_secure' option to pam_unix, which
2accepts users with null passwords only when the applicant is connected
3from a tty listed in /etc/securetty.
4
5Authors: Sam Hartman <hartmans@debian.org>,
6 Steve Langasek <vorlon@debian.org>
7
8Upstream-Status: Pending
9
10Signed-off-by: Ming Liu <ming.liu@windriver.com>
11===================================================================
12diff -urpN a/modules/pam_unix/Makefile.am b/modules/pam_unix/Makefile.am
13--- a/modules/pam_unix/Makefile.am 2013-07-05 09:51:31.014483164 +0800
14+++ b/modules/pam_unix/Makefile.am 2013-07-05 10:26:12.884484000 +0800
15@@ -30,7 +30,8 @@ if HAVE_VERSIONING
16 pam_unix_la_LDFLAGS += -Wl,--version-script=$(srcdir)/../modules.map
17 endif
18 pam_unix_la_LIBADD = $(top_builddir)/libpam/libpam.la \
19- @LIBCRYPT@ @LIBSELINUX@ $(NIS_LIBS)
20+ @LIBCRYPT@ @LIBSELINUX@ $(NIS_LIBS) \
21+ ../pam_securetty/tty_secure.lo
22
23 securelib_LTLIBRARIES = pam_unix.la
24
25diff -urpN a/modules/pam_unix/pam_unix.8 b/modules/pam_unix/pam_unix.8
26--- a/modules/pam_unix/pam_unix.8 2013-07-05 09:52:16.825108201 +0800
27+++ b/modules/pam_unix/pam_unix.8 2013-07-05 10:28:34.724483774 +0800
28@@ -220,7 +220,14 @@ A little more extreme than debug\&.
29 .RS 4
30 The default action of this module is to not permit the user access to a service if their official password is blank\&. The
31 \fBnullok\fR
32-argument overrides this default\&.
33+argument overrides this default and allows any user with a blank password to access the service\&.
34+.RE
35+.PP
36+\fBnullok_secure\fR
37+.RS 4
38+The default action of this module is to not permit the user access to a service if their official password is blank\&. The
39+\fBnullok_secure\fR
40+argument overrides this default and allows any user with a blank password to access the service as long as the value of PAM_TTY is set to one of the values found in /etc/securetty\&.
41 .RE
42 .PP
43 \fBtry_first_pass\fR
44diff -urpN a/modules/pam_unix/pam_unix.8.xml b/modules/pam_unix/pam_unix.8.xml
45--- a/modules/pam_unix/pam_unix.8.xml 2013-07-05 09:52:38.775108523 +0800
46+++ b/modules/pam_unix/pam_unix.8.xml 2013-07-05 10:30:23.084483630 +0800
47@@ -135,7 +135,24 @@
48 <para>
49 The default action of this module is to not permit the
50 user access to a service if their official password is blank.
51- The <option>nullok</option> argument overrides this default.
52+ The <option>nullok</option> argument overrides this default
53+ and allows any user with a blank password to access the
54+ service.
55+ </para>
56+ </listitem>
57+ </varlistentry>
58+ <varlistentry>
59+ <term>
60+ <option>nullok_secure</option>
61+ </term>
62+ <listitem>
63+ <para>
64+ The default action of this module is to not permit the
65+ user access to a service if their official password is blank.
66+ The <option>nullok_secure</option> argument overrides this
67+ default and allows any user with a blank password to access
68+ the service as long as the value of PAM_TTY is set to one of
69+ the values found in /etc/securetty.
70 </para>
71 </listitem>
72 </varlistentry>
73diff -urpN a/modules/pam_unix/README b/modules/pam_unix/README
74--- a/modules/pam_unix/README 2013-07-05 09:51:52.205107846 +0800
75+++ b/modules/pam_unix/README 2013-07-05 10:27:10.774484537 +0800
76@@ -57,7 +57,16 @@ nullok
77
78 The default action of this module is to not permit the user access to a
79 service if their official password is blank. The nullok argument overrides
80- this default.
81+ this default and allows any user with a blank password to access the
82+ service.
83+
84+nullok_secure
85+
86+ The default action of this module is to not permit the user access to a
87+ service if their official password is blank. The nullok_secure argument
88+ overrides this default and allows any user with a blank password to access
89+ the service as long as the value of PAM_TTY is set to one of the values
90+ found in /etc/securetty.
91
92 try_first_pass
93
94diff -urpN a/modules/pam_unix/support.c b/modules/pam_unix/support.c
95--- a/modules/pam_unix/support.c 2013-07-05 09:50:49.134482523 +0800
96+++ b/modules/pam_unix/support.c 2013-07-05 09:56:26.924484267 +0800
97@@ -84,14 +84,22 @@ int _set_ctrl(pam_handle_t *pamh, int fl
98 /* now parse the arguments to this module */
99
100 for (; argc-- > 0; ++argv) {
101- int j;
102+ int j, sl;
103
104 D(("pam_unix arg: %s", *argv));
105
106 for (j = 0; j < UNIX_CTRLS_; ++j) {
107- if (unix_args[j].token
108- && !strncmp(*argv, unix_args[j].token, strlen(unix_args[j].token))) {
109- break;
110+ if (unix_args[j].token) {
111+ sl = strlen(unix_args[j].token);
112+ if (unix_args[j].token[sl-1] == '=') {
113+ /* exclude argument from comparison */
114+ if (!strncmp(*argv, unix_args[j].token, sl))
115+ break;
116+ } else {
117+ /* compare full strings */
118+ if (!strcmp(*argv, unix_args[j].token))
119+ break;
120+ }
121 }
122 }
123
124@@ -461,6 +469,7 @@ static int _unix_run_helper_binary(pam_h
125 child = fork();
126 if (child == 0) {
127 int i=0;
128+ int nullok = off(UNIX__NONULL, ctrl);
129 struct rlimit rlim;
130 static char *envp[] = { NULL };
131 char *args[] = { NULL, NULL, NULL, NULL };
132@@ -488,7 +497,18 @@ static int _unix_run_helper_binary(pam_h
133 /* exec binary helper */
134 args[0] = strdup(CHKPWD_HELPER);
135 args[1] = x_strdup(user);
136- if (off(UNIX__NONULL, ctrl)) { /* this means we've succeeded */
137+
138+ if (on(UNIX_NULLOK_SECURE, ctrl)) {
139+ const void *uttyname;
140+ retval = pam_get_item(pamh, PAM_TTY, &uttyname);
141+ if (retval != PAM_SUCCESS || uttyname == NULL
142+ || _pammodutil_tty_secure(pamh, (const char *)uttyname) != PAM_SUCCESS)
143+ {
144+ nullok = 0;
145+ }
146+ }
147+
148+ if (nullok) {
149 args[2]=strdup("nullok");
150 } else {
151 args[2]=strdup("nonull");
152@@ -567,6 +587,17 @@ _unix_blankpasswd (pam_handle_t *pamh, u
153 if (on(UNIX__NONULL, ctrl))
154 return 0; /* will fail but don't let on yet */
155
156+ if (on(UNIX_NULLOK_SECURE, ctrl)) {
157+ int retval2;
158+ const void *uttyname;
159+ retval2 = pam_get_item(pamh, PAM_TTY, &uttyname);
160+ if (retval2 != PAM_SUCCESS || uttyname == NULL)
161+ return 0;
162+
163+ if (_pammodutil_tty_secure(pamh, (const char *)uttyname) != PAM_SUCCESS)
164+ return 0;
165+ }
166+
167 /* UNIX passwords area */
168
169 retval = get_pwd_hash(pamh, name, &pwd, &salt);
170@@ -653,7 +684,8 @@ int _unix_verify_password(pam_handle_t *
171 }
172 }
173 } else {
174- retval = verify_pwd_hash(p, salt, off(UNIX__NONULL, ctrl));
175+ retval = verify_pwd_hash(p, salt,
176+ _unix_blankpasswd(pamh, ctrl, name));
177 }
178
179 if (retval == PAM_SUCCESS) {
180diff -urpN a/modules/pam_unix/support.h b/modules/pam_unix/support.h
181--- a/modules/pam_unix/support.h 2013-07-05 09:51:10.385107934 +0800
182+++ b/modules/pam_unix/support.h 2013-07-05 10:23:54.815107842 +0800
183@@ -90,8 +90,9 @@ typedef struct {
184 password hash algorithms */
185 #define UNIX_BLOWFISH_PASS 26 /* new password hashes will use blowfish */
186 #define UNIX_MIN_PASS_LEN 27 /* min length for password */
187+#define UNIX_NULLOK_SECURE 28 /* NULL passwords allowed only on secure ttys */
188 /* -------------- */
189-#define UNIX_CTRLS_ 28 /* number of ctrl arguments defined */
190+#define UNIX_CTRLS_ 29 /* number of ctrl arguments defined */
191
192 #define UNIX_DES_CRYPT(ctrl) (off(UNIX_MD5_PASS,ctrl)&&off(UNIX_BIGCRYPT,ctrl)&&off(UNIX_SHA256_PASS,ctrl)&&off(UNIX_SHA512_PASS,ctrl)&&off(UNIX_BLOWFISH_PASS,ctrl))
193
194@@ -109,7 +110,7 @@ static const UNIX_Ctrls unix_args[UNIX_C
195 /* UNIX_NOT_SET_PASS */ {"not_set_pass", _ALL_ON_, 0100},
196 /* UNIX__PRELIM */ {NULL, _ALL_ON_^(0600), 0200},
197 /* UNIX__UPDATE */ {NULL, _ALL_ON_^(0600), 0400},
198-/* UNIX__NONULL */ {NULL, _ALL_ON_, 01000},
199+/* UNIX__NONULL */ {NULL, _ALL_ON_^(0x10000000), 0x200},
200 /* UNIX__QUIET */ {NULL, _ALL_ON_, 02000},
201 /* UNIX_USE_AUTHTOK */ {"use_authtok", _ALL_ON_, 04000},
202 /* UNIX_SHADOW */ {"shadow", _ALL_ON_, 010000},
203@@ -127,7 +128,8 @@ static const UNIX_Ctrls unix_args[UNIX_C
204 /* UNIX_SHA512_PASS */ {"sha512", _ALL_ON_^(0260420000), 040000000},
205 /* UNIX_ALGO_ROUNDS */ {"rounds=", _ALL_ON_, 0100000000},
206 /* UNIX_BLOWFISH_PASS */ {"blowfish", _ALL_ON_^(0260420000), 0200000000},
207-/* UNIX_MIN_PASS_LEN */ {"minlen=", _ALL_ON_, 0400000000},
208+/* UNIX_MIN_PASS_LEN */ {"minlen=", _ALL_ON_, 0400000000},
209+/* UNIX_NULLOK_SECURE */ {"nullok_secure", _ALL_ON_^(0x200), 0x10000000},
210 };
211
212 #define UNIX_DEFAULTS (unix_args[UNIX__NONULL].flag)
213@@ -163,6 +165,9 @@ extern int _unix_read_password(pam_handl
214 ,const char *data_name
215 ,const void **pass);
216
217+extern int _pammodutil_tty_secure(const pam_handle_t *pamh,
218+ const char *uttyname);
219+
220 extern int _unix_run_verify_binary(pam_handle_t *pamh,
221 unsigned int ctrl, const char *user, int *daysleft);
222 #endif /* _PAM_UNIX_SUPPORT_H */
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-05-05 04:47:13 +0000