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.
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nekral-guest
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10
ChangeLog
10
ChangeLog
@ -1,3 +1,13 @@
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2007-11-19 Nicolas François <nicolas.francois@centraliens.net>
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* NEWS, libmisc/obscure.c, libmisc/salt.c, src/passwd.c,
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lib/getdef.c, etc/login.defs: Add support for SHA256 and SHA512
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encrypt methods. Apply RedHat's patch shadow-4.0.18.1-sha256.patch.
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Thanks to Peter Vrabec. Hardly no changes except re-indent and
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changes related to recent modifications (max_salt_len in
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crypt_make_salt). Changes in lib/defines.h not applied (definition
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of ENCRYPTMETHOD_SELECT). I will add a configure check or flag.
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2007-11-19 Nicolas François <nicolas.francois@centraliens.net>
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* man/de/Makefile.am: Add su.1 to the generated manpages.
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2
NEWS
2
NEWS
@ -3,6 +3,8 @@ $Id$
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shadow-4.0.18.1 -> shadow-4.0.18.2 UNRELEASED
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*** general:
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- Add support for SHA256 and SHA512 encrypt methods (supported by new
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libc).
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- useradd: Allow non numerical group identifier to be specified with
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useradd's -g option.
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- chgpasswd, chpasswd: Fix chpasswd and chgpasswd stack overflow.
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@ -278,6 +278,16 @@ CHFN_RESTRICT rwh
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#
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#MD5_CRYPT_ENAB no
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#
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# Only works if compiled with ENCRYPTMETHOD_SELECT defined:
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# If set to MD5 , MD5-based algorithm will be used for encrypting password
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# If set to SHA256, SHA256-based algorithm will be used for encrypting password
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# If set to SHA512, SHA512-based algorithm will be used for encrypting password
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# If set to DES, DES-based algorithm will be used for encrypting password (default)
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# Overrides the MD5_CRYPT_ENAB option
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#
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#ENCRYPT_METHOD DES
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#
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# List of groups to add to the user's supplementary group set
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# when logging in on the console (as determined by the CONSOLE
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@ -84,6 +84,7 @@ static struct itemdef def_table[] = {
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{"CHFN_AUTH", NULL},
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{"CHSH_AUTH", NULL},
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{"CRACKLIB_DICTPATH", NULL},
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{"ENCRYPT_METHOD", NULL},
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{"ENV_HZ", NULL},
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{"ENVIRON_FILE", NULL},
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{"ENV_TZ", NULL},
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@ -210,6 +210,9 @@ static const char *password_check (const char *old, const char *new,
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int maxlen, oldlen, newlen;
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char *new1, *old1;
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const char *msg;
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#ifdef ENCRYPTMETHOD_SELECT
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char *result;
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#endif
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oldlen = strlen (old);
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newlen = strlen (new);
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@ -227,15 +230,28 @@ static const char *password_check (const char *old, const char *new,
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if (msg)
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return msg;
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#ifdef ENCRYPTMETHOD_SELECT
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if ((result = getdef_str ("ENCRYPT_METHOD")) == NULL) {
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#endif
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/* The traditional crypt() truncates passwords to 8 chars. It is
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possible to circumvent the above checks by choosing an easy
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8-char password and adding some random characters to it...
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Example: "password$%^&*123". So check it again, this time
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truncated to the maximum length. Idea from npasswd. --marekm */
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if (getdef_bool ("MD5_CRYPT_ENAB"))
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return NULL; /* unlimited password length */
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if (getdef_bool ("MD5_CRYPT_ENAB"))
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return NULL;
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#ifdef ENCRYPTMETHOD_SELECT
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} else {
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if (!strncmp (result, "MD5" , 3) ||
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!strncmp (result, "SHA256", 6) ||
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!strncmp (result, "SHA512", 6))
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return NULL;
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}
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#endif
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maxlen = getdef_num ("PASS_MAX_LEN", 8);
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if (oldlen <= maxlen && newlen <= maxlen)
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return NULL;
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@ -58,20 +58,44 @@ char *l64a(long value)
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* (magic) and pw_encrypt() will execute the MD5-based FreeBSD-compatible
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* version of crypt() instead of the standard one.
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*/
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#define MAGNUM(array,ch) (array)[0]= (array)[2] = '$',(array)[1]=(ch)
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char *crypt_make_salt (void)
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{
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struct timeval tv;
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static char result[40];
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int max_salt_len = 8;
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char *method;
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result[0] = '\0';
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#ifndef USE_PAM
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if (getdef_bool ("MD5_CRYPT_ENAB")) {
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strcpy (result, "$1$"); /* magic for the new MD5 crypt() */
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max_salt_len += 3;
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}
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#ifdef ENCRYPTMETHOD_SELECT
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if ((method = getdef_str ("ENCRYPT_METHOD")) == NULL) {
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#endif
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if (getdef_bool ("MD5_CRYPT_ENAB")) {
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MAGNUM(result,'1');
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max_salt_len = 11;
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} else
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result[0] = '\0';
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#ifdef ENCRYPTMETHOD_SELECT
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} else {
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if (!strncmp (method, "MD5", 3)) {
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MAGNUM(result, '1');
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max_salt_len = 11;
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} else if (!strncmp (method, "SHA256", 6)) {
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MAGNUM(result, '5');
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max_salt_len = 11; /* XXX: should not be fixed */
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} else if (!strncmp (method, "SHA512", 6)) {
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MAGNUM(result, '6');
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max_salt_len = 11; /* XXX: should not be fixed */
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} else if (!strncmp (method, "DES", 3))
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result[0] = '\0';
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else
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result[0] = '\0';
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}
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#endif /* ENCRYPTMETHOD_SELECT */
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#endif /* USE_PAM */
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/*
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* Generate 8 chars of salt, the old crypt() will use only first 2.
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*/
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42
src/passwd.c
42
src/passwd.c
@ -190,7 +190,10 @@ static int new_password (const struct passwd *pw)
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char pass[200]; /* New password */
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int i; /* Counter for retries */
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int warned;
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int pass_max_len;
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int pass_max_len = -1;
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#ifdef ENCRYPTMETHOD_SELECT
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char *method;
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#endif
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#ifdef HAVE_LIBCRACK_HIST
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int HistUpdate (const char *, const char *);
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@ -228,15 +231,34 @@ static int new_password (const struct passwd *pw)
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* for strength, unless it is the root user. This provides an escape
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* for initial login passwords.
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*/
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if (getdef_bool ("MD5_CRYPT_ENAB"))
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pass_max_len = 127;
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else
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pass_max_len = getdef_num ("PASS_MAX_LEN", 8);
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if (!qflg)
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printf (_("\
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Enter the new password (minimum of %d, maximum of %d characters)\n\
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Please use a combination of upper and lower case letters and numbers.\n"), getdef_num ("PASS_MIN_LEN", 5), pass_max_len);
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#ifdef ENCRYPTMETHOD_SELECT
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if ((method = getdef_str ("ENCRYPT_METHOD")) == NULL) {
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#endif
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if (!getdef_bool ("MD5_CRYPT_ENAB"))
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pass_max_len = getdef_num ("PASS_MAX_LEN", 8);
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#ifdef ENCRYPTMETHOD_SELECT
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} else {
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if (!strncmp (method, "MD5" , 3) ||
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!strncmp (method, "SHA256", 6) ||
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!strncmp (method, "SHA512", 6))
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pass_max_len = -1;
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else
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pass_max_len = getdef_num ("PASS_MAX_LEN", 8);
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}
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#endif
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if (!qflg) {
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if (pass_max_len == -1) {
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printf (_(
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"Enter the new password (minimum of %d characters)\n"
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"Please use a combination of upper and lower case letters and numbers.\n"),
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getdef_num ("PASS_MIN_LEN", 5));
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} else {
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printf (_(
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"Enter the new password (minimum of %d, maximum of %d characters)\n"
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"Please use a combination of upper and lower case letters and numbers.\n"),
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getdef_num ("PASS_MIN_LEN", 5), pass_max_len);
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}
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}
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warned = 0;
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for (i = getdef_num ("PASS_CHANGE_TRIES", 5); i > 0; i--) {
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