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improve check_password 

Fix Makefile to accept provided CFLAGS and LDFLAGS. Patch the code a bit.
This commit is contained in:
Jan Synacek 2014-12-17 15:27:30 +01:00
parent 098f3b5fe6
commit 4840f8de8e
3 changed files with 372 additions and 0 deletions
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41
check-password-makefile.patch Normal file
View File

@ -0,0 +1,41 @@
--- a/Makefile 2009-10-31 18:59:06.000000000 +0100
+++ b/Makefile 2014-12-17 09:42:37.586079225 +0100
@@ -13,22 +13,11 @@
#
CONFIG=/etc/openldap/check_password.conf
-OPT=-g -O2 -Wall -fpic \
- -DHAVE_CRACKLIB -DCRACKLIB_DICTPATH="\"$(CRACKLIB)\"" \
- -DCONFIG_FILE="\"$(CONFIG)\"" \
+CFLAGS+=-fpic \
+ -DHAVE_CRACKLIB -DCRACKLIB_DICTPATH="\"$(CRACKLIB)\"" \
+ -DCONFIG_FILE="\"$(CONFIG)\"" \
-DDEBUG
-# Where to find the OpenLDAP headers.
-#
-LDAP_INC=-I/home/pyb/tmp/openldap-2.3.39/include \
- -I/home/pyb/tmp/openldap-2.3.39/servers/slapd
-
-# Where to find the CrackLib headers.
-#
-CRACK_INC=
-
-INCS=$(LDAP_INC) $(CRACK_INC)
-
LDAP_LIB=-lldap_r -llber
# Comment out this line if you do NOT want to use the cracklib.
@@ -45,10 +34,10 @@
all: check_password
check_password.o:
- $(CC) $(OPT) -c $(INCS) check_password.c
+ $(CC) $(CFLAGS) -c $(LDAP_INC) check_password.c
check_password: clean check_password.o
- $(CC) -shared -o check_password.so check_password.o $(CRACKLIB_LIB)
+ $(CC) $(LDFLAGS) -shared -o check_password.so check_password.o $(CRACKLIB_LIB)
install: check_password
cp -f check_password.so ../../../usr/lib/openldap/modules/

321
check-password.patch Normal file
View File

@ -0,0 +1,321 @@
--- a/check_password.c 2009-10-31 18:59:06.000000000 +0100
+++ b/check_password.c 2014-12-17 12:25:00.148900907 +0100
@@ -10,7 +10,7 @@
#include <slap.h>
#ifdef HAVE_CRACKLIB
-#include "crack.h"
+#include <crack.h>
#endif
#if defined(DEBUG)
@@ -34,18 +34,77 @@
#define PASSWORD_TOO_SHORT_SZ \
"Password for dn=\"%s\" is too short (%d/6)"
#define PASSWORD_QUALITY_SZ \
- "Password for dn=\"%s\" does not pass required number of strength checks (%d of %d)"
+ "Password for dn=\"%s\" does not pass required number of strength checks for the required character sets (%d of %d)"
#define BAD_PASSWORD_SZ \
"Bad password for dn=\"%s\" because %s"
+#define UNKNOWN_ERROR_SZ \
+ "An unknown error occurred, please see your systems administrator"
typedef int (*validator) (char*);
-static int read_config_file (char *);
+static int read_config_file ();
static validator valid_word (char *);
static int set_quality (char *);
static int set_cracklib (char *);
int check_password (char *pPasswd, char **ppErrStr, Entry *pEntry);
+struct config_entry {
+ char* key;
+ char* value;
+ char* def_value;
+} config_entries[] = { { "minPoints", NULL, "3"},
+ { "useCracklib", NULL, "1"},
+ { "minUpper", NULL, "0"},
+ { "minLower", NULL, "0"},
+ { "minDigit", NULL, "0"},
+ { "minPunct", NULL, "0"},
+ { NULL, NULL, NULL }};
+
+int get_config_entry_int(char* entry) {
+ struct config_entry* centry = config_entries;
+
+ int i = 0;
+ char* key = centry[i].key;
+ while (key != NULL) {
+ if ( strncmp(key, entry, strlen(key)) == 0 ) {
+ if ( centry[i].value == NULL ) {
+ return atoi(centry[i].def_value);
+ }
+ else {
+ return atoi(centry[i].value);
+ }
+ }
+ i++;
+ key = centry[i].key;
+ }
+
+ return -1;
+}
+
+void dealloc_config_entries() {
+ struct config_entry* centry = config_entries;
+
+ int i = 0;
+ while (centry[i].key != NULL) {
+ if ( centry[i].value != NULL ) {
+ ber_memfree(centry[i].value);
+ }
+ i++;
+ }
+}
+
+char* chomp(char *s)
+{
+ char* t = ber_memalloc(strlen(s)+1);
+ strncpy (t,s,strlen(s)+1);
+
+ if ( t[strlen(t)-1] == '\n' ) {
+ t[strlen(t)-1] = '\0';
+ }
+
+ return t;
+}
+
static int set_quality (char *value)
{
#if defined(DEBUG)
@@ -84,12 +143,12 @@
char * parameter;
validator dealer;
} list[] = { { "minPoints", set_quality },
- { "useCracklib", set_cracklib },
- { "minUpper", set_digit },
- { "minLower", set_digit },
- { "minDigit", set_digit },
- { "minPunct", set_digit },
- { NULL, NULL } };
+ { "useCracklib", set_cracklib },
+ { "minUpper", set_digit },
+ { "minLower", set_digit },
+ { "minDigit", set_digit },
+ { "minPunct", set_digit },
+ { NULL, NULL } };
int index = 0;
#if defined(DEBUG)
@@ -98,7 +157,7 @@
while (list[index].parameter != NULL) {
if (strlen(word) == strlen(list[index].parameter) &&
- strcmp(list[index].parameter, word) == 0) {
+ strcmp(list[index].parameter, word) == 0) {
#if defined(DEBUG)
syslog(LOG_NOTICE, "check_password: Parameter accepted.");
#endif
@@ -114,13 +173,15 @@
return NULL;
}
-static int read_config_file (char *keyWord)
+static int read_config_file ()
{
FILE * config;
char * line;
int returnValue = -1;
- if ((line = ber_memcalloc(260, sizeof(char))) == NULL) {
+ line = ber_memcalloc(260, sizeof(char));
+
+ if ( line == NULL ) {
return returnValue;
}
@@ -133,6 +194,8 @@
return returnValue;
}
+ returnValue = 0;
+
while (fgets(line, 256, config) != NULL) {
char *start = line;
char *word, *value;
@@ -145,23 +208,40 @@
while (isspace(*start) && isascii(*start)) start++;
- if (! isascii(*start))
+ /* If we've got punctuation, just skip the line. */
+ if ( ispunct(*start)) {
+#if defined(DEBUG)
+ /* Debug traces to syslog. */
+ syslog(LOG_NOTICE, "check_password: Skipped line |%s|", line);
+#endif
continue;
+ }
- if ((word = strtok(start, " \t")) && (dealer = valid_word(word)) && (strcmp(keyWord,word)==0)) {
- if ((value = strtok(NULL, " \t")) == NULL)
- continue;
+ if( isascii(*start)) {
+
+ struct config_entry* centry = config_entries;
+ int i = 0;
+ char* keyWord = centry[i].key;
+ if ((word = strtok(start, " \t")) && (value = strtok(NULL, " \t"))) {
+ while ( keyWord != NULL ) {
+ if ((strncmp(keyWord,word,strlen(keyWord)) == 0) && (dealer = valid_word(word)) ) {
#if defined(DEBUG)
- syslog(LOG_NOTICE, "check_password: Word = %s, value = %s", word, value);
+ syslog(LOG_NOTICE, "check_password: Word = %s, value = %s", word, value);
#endif
- returnValue = (*dealer)(value);
+ centry[i].value = chomp(value);
+ break;
+ }
+ i++;
+ keyWord = centry[i].key;
+ }
+ }
}
}
-
fclose(config);
ber_memfree(line);
+
return returnValue;
}
@@ -170,7 +250,7 @@
if (curlen < nextlen + MEMORY_MARGIN) {
#if defined(DEBUG)
syslog(LOG_WARNING, "check_password: Reallocating szErrStr from %d to %d",
- curlen, nextlen + MEMORY_MARGIN);
+ curlen, nextlen + MEMORY_MARGIN);
#endif
ber_memfree(*target);
curlen = nextlen + MEMORY_MARGIN;
@@ -180,7 +260,7 @@
return curlen;
}
- int
+int
check_password (char *pPasswd, char **ppErrStr, Entry *pEntry)
{
@@ -210,20 +290,22 @@
nLen = strlen (pPasswd);
if ( nLen < 6) {
mem_len = realloc_error_message(&szErrStr, mem_len,
- strlen(PASSWORD_TOO_SHORT_SZ) +
- strlen(pEntry->e_name.bv_val) + 1);
+ strlen(PASSWORD_TOO_SHORT_SZ) +
+ strlen(pEntry->e_name.bv_val) + 1);
sprintf (szErrStr, PASSWORD_TOO_SHORT_SZ, pEntry->e_name.bv_val, nLen);
goto fail;
}
- /* Read config file */
- minQuality = read_config_file("minPoints");
+ if (read_config_file() == -1) {
+ syslog(LOG_ERR, "Warning: Could not read values from config file %s. Using defaults.", CONFIG_FILE);
+ }
- useCracklib = read_config_file("useCracklib");
- minUpper = read_config_file("minUpper");
- minLower = read_config_file("minLower");
- minDigit = read_config_file("minDigit");
- minPunct = read_config_file("minPunct");
+ minQuality = get_config_entry_int("minPoints");
+ useCracklib = get_config_entry_int("useCracklib");
+ minUpper = get_config_entry_int("minUpper");
+ minLower = get_config_entry_int("minLower");
+ minDigit = get_config_entry_int("minDigit");
+ minPunct = get_config_entry_int("minPunct");
/** The password must have at least minQuality strength points with one
* point for the first occurrance of a lower, upper, digit and
@@ -232,8 +314,6 @@
for ( i = 0; i < nLen; i++ ) {
- if ( nQuality >= minQuality ) break;
-
if ( islower (pPasswd[i]) ) {
minLower--;
if ( !nLower && (minLower < 1)) {
@@ -279,12 +359,23 @@
}
}
- if ( nQuality < minQuality ) {
+ /*
+ * If you have a required field, then it should be required in the strength
+ * checks.
+ */
+
+ if (
+ (minLower > 0 ) ||
+ (minUpper > 0 ) ||
+ (minDigit > 0 ) ||
+ (minPunct > 0 ) ||
+ (nQuality < minQuality)
+ ) {
mem_len = realloc_error_message(&szErrStr, mem_len,
- strlen(PASSWORD_QUALITY_SZ) +
- strlen(pEntry->e_name.bv_val) + 2);
+ strlen(PASSWORD_QUALITY_SZ) +
+ strlen(pEntry->e_name.bv_val) + 2);
sprintf (szErrStr, PASSWORD_QUALITY_SZ, pEntry->e_name.bv_val,
- nQuality, minQuality);
+ nQuality, minQuality);
goto fail;
}
@@ -306,7 +397,7 @@
for ( j = 0; j < 3; j++ ) {
snprintf (filename, FILENAME_MAXLEN - 1, "%s.%s", \
- CRACKLIB_DICTPATH, ext[j]);
+ CRACKLIB_DICTPATH, ext[j]);
if (( fp = fopen ( filename, "r")) == NULL ) {
@@ -326,9 +417,9 @@
r = (char *) FascistCheck (pPasswd, CRACKLIB_DICTPATH);
if ( r != NULL ) {
mem_len = realloc_error_message(&szErrStr, mem_len,
- strlen(BAD_PASSWORD_SZ) +
- strlen(pEntry->e_name.bv_val) +
- strlen(r));
+ strlen(BAD_PASSWORD_SZ) +
+ strlen(pEntry->e_name.bv_val) +
+ strlen(r));
sprintf (szErrStr, BAD_PASSWORD_SZ, pEntry->e_name.bv_val, r);
goto fail;
}
@@ -342,15 +433,15 @@
}
#endif
-
+ dealloc_config_entries();
*ppErrStr = strdup ("");
ber_memfree(szErrStr);
return (LDAP_SUCCESS);
fail:
+ dealloc_config_entries();
*ppErrStr = strdup (szErrStr);
ber_memfree(szErrStr);
return (EXIT_FAILURE);
}
-

10
openldap.spec
View File

@ -49,6 +49,10 @@ Patch20: openldap-ldapi-sasl.patch
# TLSv1 support, already included upstream
Patch21: openldap-support-tlsv1-and-later.patch
# check-password module specific patches
Patch90: check-password-makefile.patch
Patch91: check-password.patch
# Fedora specific patches
Patch100: openldap-autoconf-pkgconfig-nss.patch
Patch102: openldap-fedora-systemd.patch
@ -181,6 +185,11 @@ done
popd
pushd ltb-project-openldap-ppolicy-check-password-%{check_password_version}
%patch90 -p1
%patch91 -p1
popd
%build
%ifarch s390 s390x
@ -578,6 +587,7 @@ exit 0
%changelog
* Wed Dec 17 2014 Jan Synáček <jsynacek@redhat.com> - 2.4.40-5
- harden the build
- improve check_password
* Tue Dec 16 2014 Jan Synáček <jsynacek@redhat.com> - 2.4.40-4
- remove openldap.pc