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openldap/libraries/liblutil/passwd.c
Kurt Zeilenga 327880b984 Notice updates
2003-11-25 23:17:08 +00:00

1394 lines
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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2003 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/*
* int lutil_passwd(
* const struct berval *passwd,
* const struct berval *cred,
* const char **schemes )
*
* Returns true if user supplied credentials (cred) matches
* the stored password (passwd).
*
* Due to the use of the crypt(3) function
* this routine is NOT thread-safe.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/stdlib.h>
#include <ac/string.h>
#include <ac/unistd.h>
#ifdef SLAPD_SPASSWD
# ifdef HAVE_SASL_SASL_H
# include <sasl/sasl.h>
# else
# include <sasl.h>
# endif
#endif
#ifdef SLAPD_KPASSWD
# include <ac/krb.h>
# include <ac/krb5.h>
#endif
/* KPASSWD/krb.h brings in a conflicting des.h so don't use both.
* configure currently requires OpenSSL to enable LMHASH. Obviously
* this requirement can be fulfilled by the KRB DES library as well.
*/
#if defined(SLAPD_LMHASH) && !defined(DES_ENCRYPT)
# include <openssl/des.h>
#endif /* SLAPD_LMHASH */
#include <ac/param.h>
#ifdef SLAPD_CRYPT
# include <ac/crypt.h>
# if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
# ifdef HAVE_SHADOW_H
# include <shadow.h>
# endif
# ifdef HAVE_PWD_H
# include <pwd.h>
# endif
# ifdef HAVE_AIX_SECURITY
# include <userpw.h>
# endif
# endif
#endif
#include <lber.h>
#include "ldap_pvt.h"
#include "lber_pvt.h"
#include "lutil_md5.h"
#include "lutil_sha1.h"
#include "lutil.h"
static const unsigned char crypt64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./";
#ifdef SLAPD_CRYPT
static char *salt_format = NULL;
#endif
struct pw_scheme {
struct berval name;
LUTIL_PASSWD_CHK_FUNC *chk_fn;
LUTIL_PASSWD_HASH_FUNC *hash_fn;
};
struct pw_slist {
struct pw_slist *next;
struct pw_scheme s;
};
/* password check routines */
static LUTIL_PASSWD_CHK_FUNC chk_md5;
static LUTIL_PASSWD_CHK_FUNC chk_smd5;
static LUTIL_PASSWD_HASH_FUNC hash_smd5;
static LUTIL_PASSWD_HASH_FUNC hash_md5;
#ifdef LUTIL_SHA1_BYTES
static LUTIL_PASSWD_CHK_FUNC chk_ssha1;
static LUTIL_PASSWD_CHK_FUNC chk_sha1;
static LUTIL_PASSWD_HASH_FUNC hash_sha1;
static LUTIL_PASSWD_HASH_FUNC hash_ssha1;
#endif
#ifdef SLAPD_LMHASH
static LUTIL_PASSWD_CHK_FUNC chk_lanman;
static LUTIL_PASSWD_HASH_FUNC hash_lanman;
#endif
#ifdef SLAPD_NS_MTA_MD5
static LUTIL_PASSWD_CHK_FUNC chk_ns_mta_md5;
#endif
#ifdef SLAPD_SPASSWD
static LUTIL_PASSWD_CHK_FUNC chk_sasl;
#endif
#ifdef SLAPD_KPASSWD
static LUTIL_PASSWD_CHK_FUNC chk_kerberos;
#endif
#ifdef SLAPD_CRYPT
static LUTIL_PASSWD_CHK_FUNC chk_crypt;
static LUTIL_PASSWD_HASH_FUNC hash_crypt;
#if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
static LUTIL_PASSWD_CHK_FUNC chk_unix;
#endif
#endif
/* password hash routines */
#ifdef SLAPD_CLEARTEXT
static LUTIL_PASSWD_HASH_FUNC hash_clear;
#endif
static struct pw_slist *pw_schemes;
static const struct pw_scheme pw_schemes_default[] =
{
#ifdef LUTIL_SHA1_BYTES
{ BER_BVC("{SSHA}"), chk_ssha1, hash_ssha1 },
{ BER_BVC("{SHA}"), chk_sha1, hash_sha1 },
#endif
{ BER_BVC("{SMD5}"), chk_smd5, hash_smd5 },
{ BER_BVC("{MD5}"), chk_md5, hash_md5 },
#ifdef SLAPD_LMHASH
{ BER_BVC("{LANMAN}"), chk_lanman, hash_lanman },
#endif /* SLAPD_LMHASH */
#ifdef SLAPD_NS_MTA_MD5
{ BER_BVC("{NS-MTA-MD5}"), chk_ns_mta_md5, NULL },
#endif /* SLAPD_NS_MTA_MD5 */
#ifdef SLAPD_SPASSWD
{ BER_BVC("{SASL}"), chk_sasl, NULL },
#endif
#ifdef SLAPD_KPASSWD
{ BER_BVC("{KERBEROS}"), chk_kerberos, NULL },
#endif
#ifdef SLAPD_CRYPT
{ BER_BVC("{CRYPT}"), chk_crypt, hash_crypt },
# if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
{ BER_BVC("{UNIX}"), chk_unix, NULL },
# endif
#endif
#ifdef SLAPD_CLEARTEXT
/* pseudo scheme */
{ {0, "{CLEARTEXT}"}, NULL, hash_clear },
#endif
{ BER_BVNULL, NULL, NULL }
};
int lutil_passwd_add(
struct berval *scheme,
LUTIL_PASSWD_CHK_FUNC *chk,
LUTIL_PASSWD_HASH_FUNC *hash )
{
struct pw_slist *ptr;
ptr = ber_memalloc( sizeof( struct pw_slist ));
if (!ptr) return -1;
ptr->next = pw_schemes;
ptr->s.name = *scheme;
ptr->s.chk_fn = chk;
ptr->s.hash_fn = hash;
pw_schemes = ptr;
return 0;
}
void lutil_passwd_init()
{
struct pw_slist *ptr;
struct pw_scheme *s;
for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) {
if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn )) break;
}
}
void lutil_passwd_destroy()
{
struct pw_slist *ptr, *next;
for( ptr=pw_schemes; ptr; ptr=next ) {
next = ptr->next;
ber_memfree( ptr );
}
}
static const struct pw_scheme *get_scheme(
const char* scheme )
{
struct pw_slist *pws;
if (!pw_schemes) lutil_passwd_init();
for( pws=pw_schemes; pws; pws=pws->next ) {
if( strcasecmp(scheme, pws->s.name.bv_val ) == 0 ) {
return &(pws->s);
}
}
return NULL;
}
int lutil_passwd_scheme(
const char* scheme )
{
if( scheme == NULL ) {
return 0;
}
return get_scheme(scheme) != NULL;
}
static int is_allowed_scheme(
const char* scheme,
const char** schemes )
{
int i;
if( schemes == NULL ) return 1;
for( i=0; schemes[i] != NULL; i++ ) {
if( strcasecmp( scheme, schemes[i] ) == 0 ) {
return 1;
}
}
return 0;
}
static struct berval *passwd_scheme(
const struct pw_scheme *scheme,
const struct berval * passwd,
struct berval *bv,
const char** allowed )
{
if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) {
return NULL;
}
if( passwd->bv_len >= scheme->name.bv_len ) {
if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) {
bv->bv_val = &passwd->bv_val[scheme->name.bv_len];
bv->bv_len = passwd->bv_len - scheme->name.bv_len;
return bv;
}
}
return NULL;
}
/*
* Return 0 if creds are good.
*/
int
lutil_passwd(
const struct berval *passwd, /* stored passwd */
const struct berval *cred, /* user cred */
const char **schemes,
const char **text )
{
struct pw_slist *pws;
if ( text ) *text = NULL;
if (cred == NULL || cred->bv_len == 0 ||
passwd == NULL || passwd->bv_len == 0 )
{
return -1;
}
if (!pw_schemes) lutil_passwd_init();
for( pws=pw_schemes; pws; pws=pws->next ) {
if( pws->s.chk_fn ) {
struct berval x;
struct berval *p = passwd_scheme( &(pws->s),
passwd, &x, schemes );
if( p != NULL ) {
return (pws->s.chk_fn)( &(pws->s.name), p, cred, text );
}
}
}
#ifdef SLAPD_CLEARTEXT
if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) {
return (( passwd->bv_len == cred->bv_len ) &&
( passwd->bv_val[0] != '{' /*'}'*/ ))
? memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len )
: 1;
}
#endif
return 1;
}
struct berval * lutil_passwd_generate( ber_len_t len )
{
struct berval *pw;
if( len < 1 ) return NULL;
pw = ber_memalloc( sizeof( struct berval ) );
if( pw == NULL ) return NULL;
pw->bv_len = len;
pw->bv_val = ber_memalloc( len + 1 );
if( pw->bv_val == NULL ) {
ber_memfree( pw );
return NULL;
}
if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) {
ber_bvfree( pw );
return NULL;
}
for( len = 0; len < pw->bv_len; len++ ) {
pw->bv_val[len] = crypt64[
pw->bv_val[len] % (sizeof(crypt64)-1) ];
}
pw->bv_val[len] = '\0';
return pw;
}
struct berval * lutil_passwd_hash(
const struct berval * passwd,
const char * method,
const char **text )
{
const struct pw_scheme *sc = get_scheme( method );
if( text ) *text = NULL;
if( sc == NULL ) return NULL;
if( ! sc->hash_fn ) return NULL;
return (sc->hash_fn)( &sc->name, passwd, text );
}
/* pw_string is only called when SLAPD_LMHASH or SLAPD_CRYPT is defined */
#if defined(SLAPD_LMHASH) || defined(SLAPD_CRYPT)
static struct berval * pw_string(
const struct berval *sc,
const struct berval *passwd )
{
struct berval *pw = ber_memalloc( sizeof( struct berval ) );
if( pw == NULL ) return NULL;
pw->bv_len = sc->bv_len + passwd->bv_len;
pw->bv_val = ber_memalloc( pw->bv_len + 1 );
if( pw->bv_val == NULL ) {
ber_memfree( pw );
return NULL;
}
AC_MEMCPY( pw->bv_val, sc->bv_val, sc->bv_len );
AC_MEMCPY( &pw->bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len );
pw->bv_val[pw->bv_len] = '\0';
return pw;
}
#endif /* SLAPD_LMHASH || SLAPD_CRYPT */
static struct berval * pw_string64(
const struct berval *sc,
const struct berval *hash,
const struct berval *salt )
{
int rc;
struct berval string;
struct berval *b64 = ber_memalloc( sizeof(struct berval) );
size_t b64len;
if( b64 == NULL ) return NULL;
if( salt ) {
/* need to base64 combined string */
string.bv_len = hash->bv_len + salt->bv_len;
string.bv_val = ber_memalloc( string.bv_len + 1 );
if( string.bv_val == NULL ) {
ber_memfree( b64 );
return NULL;
}
AC_MEMCPY( string.bv_val, hash->bv_val,
hash->bv_len );
AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val,
salt->bv_len );
string.bv_val[string.bv_len] = '\0';
} else {
string = *hash;
}
b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1;
b64->bv_len = b64len + sc->bv_len;
b64->bv_val = ber_memalloc( b64->bv_len + 1 );
if( b64->bv_val == NULL ) {
if( salt ) ber_memfree( string.bv_val );
ber_memfree( b64 );
return NULL;
}
AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len);
rc = lutil_b64_ntop(
(unsigned char *) string.bv_val, string.bv_len,
&b64->bv_val[sc->bv_len], b64len );
if( salt ) ber_memfree( string.bv_val );
if( rc < 0 ) {
ber_bvfree( b64 );
return NULL;
}
/* recompute length */
b64->bv_len = sc->bv_len + rc;
assert( strlen(b64->bv_val) == b64->bv_len );
return b64;
}
/* PASSWORD CHECK ROUTINES */
#ifdef LUTIL_SHA1_BYTES
static int chk_ssha1(
const struct berval *sc,
const struct berval * passwd,
const struct berval * cred,
const char **text )
{
lutil_SHA1_CTX SHA1context;
unsigned char SHA1digest[LUTIL_SHA1_BYTES];
int rc;
unsigned char *orig_pass = NULL;
/* safety check */
if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(SHA1digest)) {
return -1;
}
/* decode base64 password */
orig_pass = (unsigned char *) ber_memalloc( (size_t) (
LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
if( orig_pass == NULL ) return -1;
rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
if (rc < 0 || (unsigned)rc <= sizeof(SHA1digest)) {
ber_memfree(orig_pass);
return -1;
}
/* hash credentials with salt */
lutil_SHA1Init(&SHA1context);
lutil_SHA1Update(&SHA1context,
(const unsigned char *) cred->bv_val, cred->bv_len);
lutil_SHA1Update(&SHA1context,
(const unsigned char *) &orig_pass[sizeof(SHA1digest)],
rc - sizeof(SHA1digest));
lutil_SHA1Final(SHA1digest, &SHA1context);
/* compare */
rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
ber_memfree(orig_pass);
return rc ? 1 : 0;
}
static int chk_sha1(
const struct berval *sc,
const struct berval * passwd,
const struct berval * cred,
const char **text )
{
lutil_SHA1_CTX SHA1context;
unsigned char SHA1digest[LUTIL_SHA1_BYTES];
int rc;
unsigned char *orig_pass = NULL;
/* base64 un-encode password */
orig_pass = (unsigned char *) ber_memalloc( (size_t) (
LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
if( orig_pass == NULL ) return -1;
rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
if( rc != sizeof(SHA1digest) ) {
ber_memfree(orig_pass);
return -1;
}
/* hash credentials with salt */
lutil_SHA1Init(&SHA1context);
lutil_SHA1Update(&SHA1context,
(const unsigned char *) cred->bv_val, cred->bv_len);
lutil_SHA1Final(SHA1digest, &SHA1context);
/* compare */
rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest));
ber_memfree(orig_pass);
return rc ? 1 : 0;
}
#endif
static int chk_smd5(
const struct berval *sc,
const struct berval * passwd,
const struct berval * cred,
const char **text )
{
lutil_MD5_CTX MD5context;
unsigned char MD5digest[LUTIL_MD5_BYTES];
int rc;
unsigned char *orig_pass = NULL;
/* safety check */
if (LUTIL_BASE64_DECODE_LEN(passwd->bv_len) <= sizeof(MD5digest)) {
return -1;
}
/* base64 un-encode password */
orig_pass = (unsigned char *) ber_memalloc( (size_t) (
LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
if( orig_pass == NULL ) return -1;
rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
if (rc < 0 || (unsigned)rc <= sizeof(MD5digest)) {
ber_memfree(orig_pass);
return -1;
}
/* hash credentials with salt */
lutil_MD5Init(&MD5context);
lutil_MD5Update(&MD5context,
(const unsigned char *) cred->bv_val,
cred->bv_len );
lutil_MD5Update(&MD5context,
&orig_pass[sizeof(MD5digest)],
rc - sizeof(MD5digest));
lutil_MD5Final(MD5digest, &MD5context);
/* compare */
rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
ber_memfree(orig_pass);
return rc ? 1 : 0;
}
static int chk_md5(
const struct berval *sc,
const struct berval * passwd,
const struct berval * cred,
const char **text )
{
lutil_MD5_CTX MD5context;
unsigned char MD5digest[LUTIL_MD5_BYTES];
int rc;
unsigned char *orig_pass = NULL;
/* base64 un-encode password */
orig_pass = (unsigned char *) ber_memalloc( (size_t) (
LUTIL_BASE64_DECODE_LEN(passwd->bv_len) + 1) );
if( orig_pass == NULL ) return -1;
rc = lutil_b64_pton(passwd->bv_val, orig_pass, passwd->bv_len);
if ( rc != sizeof(MD5digest) ) {
ber_memfree(orig_pass);
return -1;
}
/* hash credentials with salt */
lutil_MD5Init(&MD5context);
lutil_MD5Update(&MD5context,
(const unsigned char *) cred->bv_val,
cred->bv_len );
lutil_MD5Final(MD5digest, &MD5context);
/* compare */
rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest));
ber_memfree(orig_pass);
return rc ? 1 : 0;
}
#ifdef SLAPD_LMHASH
/* pseudocode from RFC2433
* A.2 LmPasswordHash()
*
* LmPasswordHash(
* IN 0-to-14-oem-char Password,
* OUT 16-octet PasswordHash )
* {
* Set UcasePassword to the uppercased Password
* Zero pad UcasePassword to 14 characters
*
* DesHash( 1st 7-octets of UcasePassword,
* giving 1st 8-octets of PasswordHash )
*
* DesHash( 2nd 7-octets of UcasePassword,
* giving 2nd 8-octets of PasswordHash )
* }
*
*
* A.3 DesHash()
*
* DesHash(
* IN 7-octet Clear,
* OUT 8-octet Cypher )
* {
* *
* * Make Cypher an irreversibly encrypted form of Clear by
* * encrypting known text using Clear as the secret key.
* * The known text consists of the string
* *
* * KGS!@#$%
* *
*
* Set StdText to "KGS!@#$%"
* DesEncrypt( StdText, Clear, giving Cypher )
* }
*
*
* A.4 DesEncrypt()
*
* DesEncrypt(
* IN 8-octet Clear,
* IN 7-octet Key,
* OUT 8-octet Cypher )
* {
* *
* * Use the DES encryption algorithm [4] in ECB mode [9]
* * to encrypt Clear into Cypher such that Cypher can
* * only be decrypted back to Clear by providing Key.
* * Note that the DES algorithm takes as input a 64-bit
* * stream where the 8th, 16th, 24th, etc. bits are
* * parity bits ignored by the encrypting algorithm.
* * Unless you write your own DES to accept 56-bit input
* * without parity, you will need to insert the parity bits
* * yourself.
* *
* }
*/
static void lmPasswd_to_key(
const unsigned char *lmPasswd,
des_cblock *key)
{
/* make room for parity bits */
((char *)key)[0] = lmPasswd[0];
((char *)key)[1] = ((lmPasswd[0]&0x01)<<7) | (lmPasswd[1]>>1);
((char *)key)[2] = ((lmPasswd[1]&0x03)<<6) | (lmPasswd[2]>>2);
((char *)key)[3] = ((lmPasswd[2]&0x07)<<5) | (lmPasswd[3]>>3);
((char *)key)[4] = ((lmPasswd[3]&0x0F)<<4) | (lmPasswd[4]>>4);
((char *)key)[5] = ((lmPasswd[4]&0x1F)<<3) | (lmPasswd[5]>>5);
((char *)key)[6] = ((lmPasswd[5]&0x3F)<<2) | (lmPasswd[6]>>6);
((char *)key)[7] = ((lmPasswd[6]&0x7F)<<1);
des_set_odd_parity( key );
}
static int chk_lanman(
const struct berval *scheme,
const struct berval *passwd,
const struct berval *cred,
const char **text )
{
int i;
char UcasePassword[15];
des_cblock key;
des_key_schedule schedule;
des_cblock StdText = "KGS!@#$%";
des_cblock PasswordHash1, PasswordHash2;
char PasswordHash[33], storedPasswordHash[33];
for( i=0; i<cred->bv_len; i++) {
if(cred->bv_val[i] == '\0') {
return -1; /* NUL character in password */
}
}
if( cred->bv_val[i] != '\0' ) {
return -1; /* passwd must behave like a string */
}
strncpy( UcasePassword, cred->bv_val, 14 );
UcasePassword[14] = '\0';
ldap_pvt_str2upper( UcasePassword );
lmPasswd_to_key( UcasePassword, &key );
des_set_key_unchecked( &key, schedule );
des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
lmPasswd_to_key( &UcasePassword[7], &key );
des_set_key_unchecked( &key, schedule );
des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
/* as a precaution convert stored password hash to lower case */
strncpy( storedPasswordHash, passwd->bv_val, 32 );
storedPasswordHash[32] = '\0';
ldap_pvt_str2lower( storedPasswordHash );
return memcmp( PasswordHash, storedPasswordHash, 32) ? 1 : 0;
}
#endif /* SLAPD_LMHASH */
#ifdef SLAPD_NS_MTA_MD5
static int chk_ns_mta_md5(
const struct berval *scheme,
const struct berval *passwd,
const struct berval *cred,
const char **text )
{
lutil_MD5_CTX MD5context;
unsigned char MD5digest[LUTIL_MD5_BYTES], c;
char buffer[LUTIL_MD5_BYTES*2];
int i;
if( passwd->bv_len != LUTIL_MD5_BYTES*2 ) {
return 1;
}
/* hash credentials with salt */
lutil_MD5Init(&MD5context);
lutil_MD5Update(&MD5context,
(const unsigned char *) &passwd->bv_val[32],
32 );
c = 0x59;
lutil_MD5Update(&MD5context,
(const unsigned char *) &c,
1 );
lutil_MD5Update(&MD5context,
(const unsigned char *) cred->bv_val,
cred->bv_len );
c = 0xF7;
lutil_MD5Update(&MD5context,
(const unsigned char *) &c,
1 );
lutil_MD5Update(&MD5context,
(const unsigned char *) &passwd->bv_val[32],
32 );
lutil_MD5Final(MD5digest, &MD5context);
for( i=0; i < sizeof( MD5digest ); i++ ) {
buffer[i+i] = "0123456789abcdef"[(MD5digest[i]>>4) & 0x0F];
buffer[i+i+1] = "0123456789abcdef"[ MD5digest[i] & 0x0F];
}
/* compare */
return memcmp((char *)passwd->bv_val,
(char *)buffer, sizeof(buffer)) ? 1 : 0;
}
#endif
#ifdef SLAPD_SPASSWD
#ifdef HAVE_CYRUS_SASL
sasl_conn_t *lutil_passwd_sasl_conn = NULL;
#endif
static int chk_sasl(
const struct berval *sc,
const struct berval * passwd,
const struct berval * cred,
const char **text )
{
unsigned int i;
int rtn;
for( i=0; i<cred->bv_len; i++) {
if(cred->bv_val[i] == '\0') {
return 1; /* NUL character in password */
}
}
if( cred->bv_val[i] != '\0' ) {
return 1; /* cred must behave like a string */
}
for( i=0; i<passwd->bv_len; i++) {
if(passwd->bv_val[i] == '\0') {
return 1; /* NUL character in password */
}
}
if( passwd->bv_val[i] != '\0' ) {
return 1; /* passwd must behave like a string */
}
rtn = 1;
#ifdef HAVE_CYRUS_SASL
if( lutil_passwd_sasl_conn != NULL ) {
int sc;
# if SASL_VERSION_MAJOR < 2
sc = sasl_checkpass( lutil_passwd_sasl_conn,
passwd->bv_val, passwd->bv_len,
cred->bv_val, cred->bv_len,
text );
# else
sc = sasl_checkpass( lutil_passwd_sasl_conn,
passwd->bv_val, passwd->bv_len,
cred->bv_val, cred->bv_len );
# endif
rtn = ( sc != SASL_OK );
}
#endif
return rtn;
}
#endif
#ifdef SLAPD_KPASSWD
static int chk_kerberos(
const struct berval *sc,
const struct berval * passwd,
const struct berval * cred,
const char **text )
{
unsigned int i;
int rtn;
for( i=0; i<cred->bv_len; i++) {
if(cred->bv_val[i] == '\0') {
return 1; /* NUL character in password */
}
}
if( cred->bv_val[i] != '\0' ) {
return 1; /* cred must behave like a string */
}
for( i=0; i<passwd->bv_len; i++) {
if(passwd->bv_val[i] == '\0') {
return 1; /* NUL character in password */
}
}
if( passwd->bv_val[i] != '\0' ) {
return 1; /* passwd must behave like a string */
}
rtn = 1;
#ifdef HAVE_KRB5 /* HAVE_HEIMDAL_KRB5 */
{
/* Portions:
* Copyright (c) 1997, 1998, 1999 Kungliga Tekniska H\xf6gskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
krb5_context context;
krb5_error_code ret;
krb5_creds creds;
krb5_get_init_creds_opt get_options;
krb5_verify_init_creds_opt verify_options;
krb5_principal client, server;
#ifdef notdef
krb5_preauthtype pre_auth_types[] = {KRB5_PADATA_ENC_TIMESTAMP};
#endif
ret = krb5_init_context( &context );
if (ret) {
return 1;
}
#ifdef notdef
krb5_get_init_creds_opt_set_preauth_list(&get_options,
pre_auth_types, 1);
#endif
krb5_get_init_creds_opt_init( &get_options );
krb5_verify_init_creds_opt_init( &verify_options );
ret = krb5_parse_name( context, passwd->bv_val, &client );
if (ret) {
krb5_free_context( context );
return 1;
}
ret = krb5_get_init_creds_password( context,
&creds, client, cred->bv_val, NULL,
NULL, 0, NULL, &get_options );
if (ret) {
krb5_free_principal( context, client );
krb5_free_context( context );
return 1;
}
{
char *host = ldap_pvt_get_fqdn( NULL );
if( host == NULL ) {
krb5_free_principal( context, client );
krb5_free_context( context );
return 1;
}
ret = krb5_sname_to_principal( context,
host, "ldap", KRB5_NT_SRV_HST, &server );
ber_memfree( host );
}
if (ret) {
krb5_free_principal( context, client );
krb5_free_context( context );
return 1;
}
ret = krb5_verify_init_creds( context,
&creds, server, NULL, NULL, &verify_options );
krb5_free_principal( context, client );
krb5_free_principal( context, server );
krb5_free_cred_contents( context, &creds );
krb5_free_context( context );
rtn = !!ret;
}
#elif defined(HAVE_KRB4)
{
/* Borrowed from Heimdal kpopper */
/* Portions:
* Copyright (c) 1989 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
int status;
char lrealm[REALM_SZ];
char tkt[MAXHOSTNAMELEN];
status = krb_get_lrealm(lrealm,1);
if (status == KFAILURE) {
return 1;
}
snprintf(tkt, sizeof(tkt), "%s_slapd.%u",
TKT_ROOT, (unsigned)getpid());
krb_set_tkt_string (tkt);
status = krb_verify_user( passwd->bv_val, "", lrealm,
cred->bv_val, 1, "ldap");
dest_tkt(); /* no point in keeping the tickets */
return status == KFAILURE;
}
#endif
return rtn;
}
#endif /* SLAPD_KPASSWD */
#ifdef SLAPD_CRYPT
static int chk_crypt(
const struct berval *sc,
const struct berval * passwd,
const struct berval * cred,
const char **text )
{
char *cr;
unsigned int i;
for( i=0; i<cred->bv_len; i++) {
if(cred->bv_val[i] == '\0') {
return 1; /* NUL character in password */
}
}
if( cred->bv_val[i] != '\0' ) {
return -1; /* cred must behave like a string */
}
if( passwd->bv_len < 2 ) {
return -1; /* passwd must be at least two characters long */
}
for( i=0; i<passwd->bv_len; i++) {
if(passwd->bv_val[i] == '\0') {
return -1; /* NUL character in password */
}
}
if( passwd->bv_val[i] != '\0' ) {
return -1; /* passwd must behave like a string */
}
cr = crypt( cred->bv_val, passwd->bv_val );
if( cr == NULL || cr[0] == '\0' ) {
/* salt must have been invalid */
return -1;
}
return strcmp( passwd->bv_val, cr ) ? 1 : 0;
}
# if defined( HAVE_GETPWNAM ) && defined( HAVE_PW_PASSWD )
static int chk_unix(
const struct berval *sc,
const struct berval * passwd,
const struct berval * cred,
const char **text )
{
unsigned int i;
char *pw,*cr;
for( i=0; i<cred->bv_len; i++) {
if(cred->bv_val[i] == '\0') {
return -1; /* NUL character in password */
}
}
if( cred->bv_val[i] != '\0' ) {
return -1; /* cred must behave like a string */
}
for( i=0; i<passwd->bv_len; i++) {
if(passwd->bv_val[i] == '\0') {
return -1; /* NUL character in password */
}
}
if( passwd->bv_val[i] != '\0' ) {
return -1; /* passwd must behave like a string */
}
{
struct passwd *pwd = getpwnam(passwd->bv_val);
if(pwd == NULL) {
return -1; /* not found */
}
pw = pwd->pw_passwd;
}
# ifdef HAVE_GETSPNAM
{
struct spwd *spwd = getspnam(passwd->bv_val);
if(spwd != NULL) {
pw = spwd->sp_pwdp;
}
}
# endif
# ifdef HAVE_AIX_SECURITY
{
struct userpw *upw = getuserpw(passwd->bv_val);
if (upw != NULL) {
pw = upw->upw_passwd;
}
}
# endif
if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) {
/* password must must be at least two characters long */
return -1;
}
cr = crypt(cred->bv_val, pw);
if( cr == NULL || cr[0] == '\0' ) {
/* salt must have been invalid */
return -1;
}
return strcmp(pw, cr) ? 1 : 0;
}
# endif
#endif
/* PASSWORD GENERATION ROUTINES */
#ifdef LUTIL_SHA1_BYTES
static struct berval *hash_ssha1(
const struct berval *scheme,
const struct berval *passwd,
const char **text )
{
lutil_SHA1_CTX SHA1context;
unsigned char SHA1digest[LUTIL_SHA1_BYTES];
char saltdata[4];
struct berval digest;
struct berval salt;
digest.bv_val = (char *) SHA1digest;
digest.bv_len = sizeof(SHA1digest);
salt.bv_val = saltdata;
salt.bv_len = sizeof(saltdata);
if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
return NULL;
}
lutil_SHA1Init( &SHA1context );
lutil_SHA1Update( &SHA1context,
(const unsigned char *)passwd->bv_val, passwd->bv_len );
lutil_SHA1Update( &SHA1context,
(const unsigned char *)salt.bv_val, salt.bv_len );
lutil_SHA1Final( SHA1digest, &SHA1context );
return pw_string64( scheme, &digest, &salt);
}
static struct berval *hash_sha1(
const struct berval *scheme,
const struct berval *passwd,
const char **text )
{
lutil_SHA1_CTX SHA1context;
unsigned char SHA1digest[LUTIL_SHA1_BYTES];
struct berval digest;
digest.bv_val = (char *) SHA1digest;
digest.bv_len = sizeof(SHA1digest);
lutil_SHA1Init( &SHA1context );
lutil_SHA1Update( &SHA1context,
(const unsigned char *)passwd->bv_val, passwd->bv_len );
lutil_SHA1Final( SHA1digest, &SHA1context );
return pw_string64( scheme, &digest, NULL);
}
#endif
static struct berval *hash_smd5(
const struct berval *scheme,
const struct berval *passwd,
const char **text )
{
lutil_MD5_CTX MD5context;
unsigned char MD5digest[LUTIL_MD5_BYTES];
char saltdata[4];
struct berval digest;
struct berval salt;
digest.bv_val = (char *) MD5digest;
digest.bv_len = sizeof(MD5digest);
salt.bv_val = saltdata;
salt.bv_len = sizeof(saltdata);
if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) {
return NULL;
}
lutil_MD5Init( &MD5context );
lutil_MD5Update( &MD5context,
(const unsigned char *) passwd->bv_val, passwd->bv_len );
lutil_MD5Update( &MD5context,
(const unsigned char *) salt.bv_val, salt.bv_len );
lutil_MD5Final( MD5digest, &MD5context );
return pw_string64( scheme, &digest, &salt );
}
static struct berval *hash_md5(
const struct berval *scheme,
const struct berval *passwd,
const char **text )
{
lutil_MD5_CTX MD5context;
unsigned char MD5digest[LUTIL_MD5_BYTES];
struct berval digest;
digest.bv_val = (char *) MD5digest;
digest.bv_len = sizeof(MD5digest);
lutil_MD5Init( &MD5context );
lutil_MD5Update( &MD5context,
(const unsigned char *) passwd->bv_val, passwd->bv_len );
lutil_MD5Final( MD5digest, &MD5context );
return pw_string64( scheme, &digest, NULL );
;
}
#ifdef SLAPD_LMHASH
static struct berval *hash_lanman(
const struct berval *scheme,
const struct berval *passwd,
const char **text )
{
int i;
char UcasePassword[15];
des_cblock key;
des_key_schedule schedule;
des_cblock StdText = "KGS!@#$%";
des_cblock PasswordHash1, PasswordHash2;
char PasswordHash[33];
struct berval hash;
for( i=0; i<passwd->bv_len; i++) {
if(passwd->bv_val[i] == '\0') {
return NULL; /* NUL character in password */
}
}
if( passwd->bv_val[i] != '\0' ) {
return NULL; /* passwd must behave like a string */
}
strncpy( UcasePassword, passwd->bv_val, 14 );
UcasePassword[14] = '\0';
ldap_pvt_str2upper( UcasePassword );
lmPasswd_to_key( UcasePassword, &key );
des_set_key_unchecked( &key, schedule );
des_ecb_encrypt( &StdText, &PasswordHash1, schedule , DES_ENCRYPT );
lmPasswd_to_key( &UcasePassword[7], &key );
des_set_key_unchecked( &key, schedule );
des_ecb_encrypt( &StdText, &PasswordHash2, schedule , DES_ENCRYPT );
sprintf( PasswordHash, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
PasswordHash1[0],PasswordHash1[1],PasswordHash1[2],PasswordHash1[3],
PasswordHash1[4],PasswordHash1[5],PasswordHash1[6],PasswordHash1[7],
PasswordHash2[0],PasswordHash2[1],PasswordHash2[2],PasswordHash2[3],
PasswordHash2[4],PasswordHash2[5],PasswordHash2[6],PasswordHash2[7] );
hash.bv_val = PasswordHash;
hash.bv_len = 32;
return pw_string( scheme, &hash );
}
#endif /* SLAPD_LMHASH */
#ifdef SLAPD_CRYPT
static struct berval *hash_crypt(
const struct berval *scheme,
const struct berval *passwd,
const char **text )
{
struct berval hash;
unsigned char salt[32]; /* salt suitable for most anything */
unsigned int i;
for( i=0; i<passwd->bv_len; i++) {
if(passwd->bv_val[i] == '\0') {
return NULL; /* NUL character in password */
}
}
if( passwd->bv_val[i] != '\0' ) {
return NULL; /* passwd must behave like a string */
}
if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) {
return NULL;
}
for( i=0; i< ( sizeof(salt) - 1 ); i++ ) {
salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ];
}
salt[sizeof( salt ) - 1 ] = '\0';
if( salt_format != NULL ) {
/* copy the salt we made into entropy before snprintfing
it back into the salt */
char entropy[sizeof(salt)];
strcpy( entropy, (char *) salt );
snprintf( (char *) salt, sizeof(entropy), salt_format, entropy );
}
hash.bv_val = crypt( passwd->bv_val, (char *) salt );
if( hash.bv_val == NULL ) return NULL;
hash.bv_len = strlen( hash.bv_val );
if( hash.bv_len == 0 ) {
return NULL;
}
return pw_string( scheme, &hash );
}
#endif
int lutil_salt_format(const char *format)
{
#ifdef SLAPD_CRYPT
free( salt_format );
salt_format = format != NULL ? strdup( format ) : NULL;
#endif
return 0;
}
#ifdef SLAPD_CLEARTEXT
static struct berval *hash_clear(
const struct berval *scheme,
const struct berval *passwd,
const char **text )
{
return ber_bvdup( (struct berval *) passwd );
}
#endif
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