Commit Graph

41 Commits

Author SHA1 Message Date
Serge Hallyn
2b22a6909d libsubid: don't print error messages on stderr by default
Closes #325

Add a new subid_init() function which can be used to specify the
stream on which error messages should be printed.  (If you want to
get fancy you can redirect that to memory :)  If subid_init() is
not called, use stderr.  If NULL is passed, then /dev/null will
be used.

This patch also fixes up the 'Prog', which previously had to be
defined by any program linking against libsubid.  Now, by default
in libsubid it will show (subid).  Once subid_init() is called,
it will use the first variable passed to subid_init().

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-05-15 12:38:55 -05:00
Rodolphe Bréard
5cd04d03f9 Add yescrypt support 2021-02-01 22:11:10 +01:00
prez
2958bd050b Initial bcrypt support 2019-12-01 11:00:57 -06:00
Nicolas François
5884ba907c (shadow_random): Use long instead of size_t.
* libmisc/salt.c (shadow_random): Use long instead of size_t.
	Compatibility with size_t is easier to check since it's used for
	smaller numbers (salt size).
2013-08-13 19:16:24 +02:00
Nicolas François
14ebc92d8c Remove unused variable.
* libmisc/salt.c: Remove unused variable.
2013-08-10 00:11:52 +02:00
Nicolas François
60fc4bbf57 Debian bug 677275 - random() max value
* libmisc/salt.c: random() max value is 2^31-1 (same as RAND_MAX
	on GNU). As it is not clear whether on some systems the max value
	can exceed this number and whether some systems have max values
	which would be lower, we take this into account when defining the
	salt size and number of rounds for SHA encrypted passwords. Higher
	values are favored.
2013-08-05 14:19:23 +02:00
nekral-guest
cd10be6c91 * libmisc/salt.c (SHA_salt_rounds): It is statically ensured that
the format fits in rounds_prefix.
2011-09-18 20:40:50 +00:00
nekral-guest
a9c38f4902 * src/chgpasswd.c: Add splint annotations.
* src/chpasswd.c: Likewise.
	* src/newusers.c: Likewise.
	* libmisc/salt.c, lib/prototypes.h (crypt_make_salt): Likewise.
2011-08-14 14:37:17 +00:00
nekral-guest
07e462f01f * libmisc/limits.c: Avoid implicit conversion of integer to
boolean.
	* libmisc/basename.c: Avoid implicit conversion of pointer to
	boolean.
	* libmisc/basename.c, lib/prototypes.h (Basename): Return a
	constant string.
	* libmisc/basename.c, libmisc/obscure.c, lib/prototypes.h,
	libmisc/xmalloc.c, libmisc/getdate.h, libmisc/system.c,
	libmisc/getgr_nam_gid.c, libmisc/failure.c, libmisc/valid.c: Add
	splint annotations.
	* libmisc/chowndir.c: Avoid memory leak.
	* libmisc/chowndir.c: Do not check *printf/*puts return value.
	* libmisc/chowntty.c: Avoid implicit conversion between integer
	types.
	* libmisc/obscure.c: Return a bool when possible instead of int.
	* libmisc/shell.c: Do not check *printf/*puts return value.
	* libmisc/shell.c: Do not check execle return value.
	* libmisc/setupenv.c: Avoid implicit conversion between integer
	types.
	* libmisc/xmalloc.c: size should not be zero to avoid returning
	NULL pointers.
	* libmisc/hushed.c: Do not check *printf/*puts return value.
	* libmisc/system.c: Avoid implicit conversion of integer to
	boolean. safe_system last argument is a boolean.
	* libmisc/system.c: Check return value of dup2.
	* libmisc/system.c: Do not check *printf/*puts return value.
	* libmisc/system.c: Do not check execve return value. 
	* libmisc/salt.c: Do not check *printf/*puts return value.
	* libmisc/loginprompt.c: Do not check gethostname return value.
	* libmisc/find_new_gid.c, libmisc/find_new_uid.c: Do not check
	gr_rewind/pw_rewind return value.
	* libmisc/ttytype.c: Limit the number of parsed characters in the
	sscanf format.
	* libmisc/ttytype.c: Test if a type was really read.
	* libmisc/sub.c: Do not check *printf/*puts return value.
	* libmisc/sub.c: Avoid implicit conversion of integer to boolean.
	* src/userdel.c: Fix typo in comment.
	* src/userdel.c: Avoid implicit conversion of boolean to integer.
	* src/userdel.c: safe_system last argument is a boolean.
	* src/newusers.c: Avoid implicit conversion of boolean to integer.
	* src/newusers.c: Avoid implicit conversion of integer to boolean.
	* src/usermod.c: Add brackets.
	* src/usermod.c: Avoid implicit conversion of characters or
	integers to booleans.
	* src/vipw.c: Avoid implicit conversion of integer to boolean.
	* src/su.c: Avoid implicit conversion of integer to boolean.
	* src/su.c: Add brackets.
	* src/useradd.c: Avoid implicit conversion of characters or
	integers to booleans.
2010-08-22 19:13:53 +00:00
nekral-guest
0c571784a3 * libmisc/salt.c: In case gettimeofday() fails, get some entropy
from the PID.
2009-04-24 22:49:20 +00:00
nekral-guest
614c79defc * libmisc/xgetXXbyYY.c, libmisc/myname.c, libmisc/getgr_nam_gid.c,
libmisc/salt.c, libmisc/list.c, libmisc/cleanup.c, src/login.c,
	lib/getdef.h, lib/groupio.c, lib/getlong.c, lib/gshadow_.h,
	lib/sgroupio.c, lib/shadowio.c, lib/pwio.c, lib/commonio.h,
	lib/fputsx.c, lib/prototypes.h: Added splint annotations.
	* lib/groupio.c: Avoid implicit conversion of pointers to
	booleans.
	* lib/groupio.c: Free allocated buffers in case of failure.
2009-04-23 09:57:03 +00:00
nekral-guest
c8f45eda53 * lib/defines.h: Added MIN and MAX macros.
* libmisc/salt.c: Removed MIN and MAX macros.
2009-04-21 22:06:09 +00:00
nekral-guest
87da822c7f * libmisc/salt.c: Removed l64a prototype. The libc declaration is
non static, but the internal definition is static.
2009-03-13 19:17:24 +00:00
nekral-guest
7f8c48834f * libmisc/salt.c: Use a size_t for the size of strings instead of
unsigned int.
	* libmisc/salt.c: Add brackets and parenthesis.
	* libmisc/salt.c: Avoid assignments in comparisons.
2008-06-13 19:37:15 +00:00
nekral-guest
d99423405c Fix compiler warnings:
* libmisc/audit_help.c: Include prototypes.h to get the prototype
	of audit_help_open.
	* libmisc/salt.c: Use booleans instead of negating integers.
	* src/passwd.c: Declare the check_selinux_access prototype and
	avoid name clashes (change_user -> changed_user; change_uid ->
	changed_uid; access -> requested_access)
2008-05-24 13:08:58 +00:00
nekral-guest
a917ba4fb9 *** security:
- generation of SHA encrypted passwords (chpasswd, gpasswd, newusers,
  chgpasswd; and also passwd if configured without PAM support).
  The number of rounds and number of salt bytes was fixed to their lower
  allowed values (resp. configurable and 8), hence voiding some of the
  advantages of this encryption method. Dictionary attacks with
  precomputed tables were easier than expected, but still harder than with
  the MD5 (or DES) methods.

	* NEWS, libmisc/salt.c (SHA_salt_size): Seed the RNG, and fix a
	overflow. These caused the SHA salt size to always be 8 bytes,
	instead of being in the 8-16 range. Thanks to Peter Vrabec
	pvrabec@redhat.com for noticing.
	* NEWS, libmisc/salt.c (SHA_salt_rounds): Seed the RNG with
	seedRNG instead of srand, and fix the same overflow. This caused
	the number of rounds to always be the smallest one.
2008-05-20 13:34:06 +00:00
nekral-guest
337a97ceab Document the sections closed by #endif 2008-05-19 20:56:48 +00:00
nekral-guest
c7302b61ef Make sure every source files are distributed with a copyright and license.
Files with no license use the default 3-clauses BSD license. The copyright
were mostly not recorded; they were updated according to the Changelog.
"Julianne Frances Haugh and contributors" changed to "copyright holders
and contributors".
2008-04-27 00:40:09 +00:00
nekral-guest
65ed10d75c Do not seed the random number generator each time, and use the time in
microseconds to avoid having the same salt for different passwords
generated in the same second.  This permits to avoid using the same salt
for different passwords in newusers.
2008-02-03 17:23:58 +00:00
nekral-guest
ae99674e9b Fix build failures with --disable-shadowgrp. Thanks to Jürgen
Daubert for the patch.
* libmisc/salt.c: Include <stdio.h>, needed for stderr and printf
  functions.
* lib/encrypt.c: Include <stdio.h>, needed for perror, stderr and
  printf functions
* src/usermod.c: sgr_locked exists only if SHADOWGRP is defined.
* src/chgpasswd.c: Only check is the gshadow file exists if
  SHADOWGRP is defined.
2008-01-26 17:41:20 +00:00
nekral-guest
e663f6c0b4 * libmisc/salt.c: Add prototype for l64a(), gensalt(),
SHA_salt_size(), and SHA_salt_rounds().
* libmisc/salt.c: l64a() and gensalt() are static.
* libmisc/salt.c: The `meth' parameter of crypt_make_salt() is a
  const. (ditto for the method variable).
* libmisc/salt.c: SHA_salt_rounds returns a const string.
* libmisc/salt.c: Avoid warnings with cast of random() to double.
* libmisc/salt.c: Replace rand() by random().
2008-01-06 14:50:26 +00:00
nekral-guest
4d606cc690 * configure.in: New configure option: --with-sha-crypt enabled by
default. Keeping the feature enabled is safe. Disabling it permits
  to disable the references to the SHA256 and SHA512 password
  encryption algorithms from the usage help and manuals (in addition
  to the support for these algorithms in the code).
* libmisc/obscure.c, libmisc/salt.c, src/newusers.c,
  src/chpasswd.c, src/chgpasswd.c, src/passwd.c: ENCRYPT_METHOD is
  always supported in login.defs. Remove the ENCRYPTMETHOD_SELECT
  preprocessor condition.
* libmisc/obscure.c, libmisc/salt.c, src/newusers.c,
  src/chpasswd.c, src/chgpasswd.c, src/passwd.c: Disable SHA256 and
  SHA512 if USE_SHA_CRYPT is not defined (this corresponds to a
  subset of the ENCRYPTMETHOD_SELECT sections).
2007-11-24 13:08:08 +00:00
nekral-guest
e1e619074c Re-indent. 2007-11-24 00:00:12 +00:00
nekral-guest
a99bec34a9 Make sure method is not NULL, defaulting to DES. Thanks to Dan Kopecek <dkopecek@redhat.com>. 2007-11-23 23:57:47 +00:00
nekral-guest
963bfaf521 * Move the srandom call to gensalt.
* Replace the test on salt_size by an assert.
2007-11-23 21:04:43 +00:00
nekral-guest
43b10b311a Applied patch shadow-utils-4.0.18.2-salt.patch. Thanks to Dan Kopecek <dkopecek@redhat.com> 2007-11-23 20:51:43 +00:00
nekral-guest
9aa40bb96d * libmisc/obscure.c, libmisc/salt.c, src/passwd.c: Match DES, MD5,
SHA256, and SHA512 exactly (not only the first 3/6 chars).
* libmisc/salt.c (SHA_salt_rounds): Set rounds to the specified
  prefered_rounds value, if specified.
* src/gpasswd.c, libmisc/salt.c: Fix compilation warnings (use
  size_t for lengths).
* src/chpasswd.c, src/chgpasswd.c: Add missing parenthesis.
2007-11-20 20:00:16 +00:00
nekral-guest
0b695f5a76 * lib/prototypes.h, libmisc/salt.c: Add parameters to
crypt_make_salt to force the crypt method and number of rounds.
* libmisc/salt.c: Add parameter to SHA_salt_rounds to force the
  number of rounds.
* libmisc/salt.c, lib/getdef.c: ENCRYPT_METHOD and MD5_CRYPT_ENAB
  are needed also when USE_PAM (e.g. for chpasswd).
* src/newusers.c, src/gpasswd.c: Use the new crypt_make_salt prototype.
* src/chpasswd.c, src/chgpasswd.c: Add option -c, --crypt-method
  and -s, --sha-rounds to specify the crypt method and number of
  rounds in case of one of the SHA methods. The new prototype of
  crypt_make_salt simplifies the handling of -m, --md5.
2007-11-20 09:33:52 +00:00
nekral-guest
eb23bbfd98 Hopefully, I review my commits in the morning... 2007-11-20 09:20:34 +00:00
nekral-guest
e406b7fe4a * libmisc/salt.c: The salt has a random size (between 8 and 16
bytes).
* lib/getdef.c, etc/login.defs: Add definitions for
  SHA_CRYPT_MIN_ROUNDS and SHA_CRYPT_MAX_ROUNDS.
* libmisc/salt.c: Use SHA_CRYPT_MIN_ROUNDS and SHA_CRYPT_MAX_ROUNDS
  to add a random number of rounds if needed.
2007-11-20 00:05:54 +00:00
nekral-guest
c214b26ee6 * libmisc/salt.c (MAGNUM): Terminate the array with nul (the array
is then used with strcat).
* libmisc/salt.c (crypt_make_salt): Initialize result[0] to nul at
  the beginning (was not initialized when USE_PAM).
* libmisc/salt.c (crypt_make_salt): Check that ENCRYPT_METHOD is a
  valid crypt method.
2007-11-19 22:34:48 +00:00
nekral-guest
65f536165d Fix typo introduced while merging RedHat patch shadow-4.0.18.1-sha256.patch. 2007-11-19 22:16:50 +00:00
nekral-guest
b8d8d0de00 Add support for SHA256 and SHA512 encrypt methods. Apply RedHat's patch
shadow-4.0.18.1-sha256.patch. Thanks to Peter Vrabec. Hardly no changes
except re-indent and changes related to recent modifications (max_salt_len
in crypt_make_salt). Changes in lib/defines.h not applied (definition of
ENCRYPTMETHOD_SELECT). I will add a configure check or flag.
2007-11-19 22:14:19 +00:00
nekral-guest
449f17385a * libmisc/salt.c: Make sure the salt string is terminated at the
right place (either 8th, or 11th position).
 * NEWS, src/chgpasswd.c, src/chpasswd.c: The protocol + salt does
   not need 15 chars. No need for a temporary buffer.
   This change the fix committed on 2007-11-10. The salt provided to
   pw_encrypt could have been too long.
2007-11-16 19:02:00 +00:00
nekral-guest
f55e00dc4e Add support for uClibc with no l64a(). 2007-11-16 12:36:21 +00:00
nekral-guest
b2120265fd Added the subversion svn:keywords property (Id) for proper identification. 2007-11-10 23:46:11 +00:00
nekral-guest
8451bed8b0 [svn-upgrade] Integrating new upstream version, shadow (4.0.13) 2007-10-07 11:47:01 +00:00
nekral-guest
8c50e06102 [svn-upgrade] Integrating new upstream version, shadow (4.0.10) 2007-10-07 11:46:25 +00:00
nekral-guest
8e167d28af [svn-upgrade] Integrating new upstream version, shadow (4.0.8) 2007-10-07 11:46:07 +00:00
nekral-guest
effd479bff [svn-upgrade] Integrating new upstream version, shadow (4.0.4) 2007-10-07 11:45:23 +00:00
nekral-guest
45c6603cc8 [svn-upgrade] Integrating new upstream version, shadow (19990709) 2007-10-07 11:44:02 +00:00