/*
+ * $Id: uams_dhx_pam.c,v 1.24.6.5.2.2 2008-12-03 19:17:27 didg Exp $
+ *
* Copyright (c) 1990,1993 Regents of The University of Michigan.
* Copyright (c) 1999 Adrian Sun (asun@u.washington.edu)
* All Rights Reserved. See COPYRIGHT.
#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
+#endif /* HAVE_CONFIG_H */
#if defined(USE_PAM) && defined(UAM_DHX)
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <syslog.h>
+#include <atalk/logger.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#include <errno.h>
+#ifdef HAVE_SECURITY_PAM_APPL_H
#include <security/pam_appl.h>
+#endif
+#ifdef HAVE_PAM_PAM_APPL_H
+#include <pam/pam_appl.h>
+#endif
-#ifdef OPENSSL_DHX
+
+#if defined(GNUTLS_DHX)
+#include <gnutls/openssl.h>
+#elif defined(OPENSSL_DHX)
#include <openssl/bn.h>
#include <openssl/dh.h>
#include <openssl/cast.h>
-#else
+#ifdef sun
+#include <openssl/rand.h>
+#endif
+#else /* OPENSSL_DHX */
#include <bn.h>
#include <dh.h>
#include <cast.h>
-#endif
+#endif /* OPENSSL_DHX */
#include <atalk/afp.h>
#include <atalk/uam.h>
static int PAM_conv (int num_msg,
const struct pam_message **msg,
struct pam_response **resp,
- void *appdata_ptr) {
+ void *appdata_ptr _U_) {
int count = 0;
struct pam_response *reply;
#define COPY_STRING(s) (s) ? strdup(s) : NULL
- if (num_msg < 1)
+ errno = 0;
+
+ if (num_msg < 1) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM DHX Conversation Err -- %s",
+ strerror(errno));
+ /* Log Entry */
return PAM_CONV_ERR;
+ }
reply = (struct pam_response *)
calloc(num_msg, sizeof(struct pam_response));
- if (!reply)
+ if (!reply) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM DHX Conversation Err -- %s",
+ strerror(errno));
+ /* Log Entry */
return PAM_CONV_ERR;
+ }
for (count = 0; count < num_msg; count++) {
char *string = NULL;
switch (msg[count]->msg_style) {
case PAM_PROMPT_ECHO_ON:
- if (!(string = COPY_STRING(PAM_username)))
+ if (!(string = COPY_STRING(PAM_username))) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: username failure -- %s",
+ strerror(errno));
+ /* Log Entry */
goto pam_fail_conv;
+ }
break;
case PAM_PROMPT_ECHO_OFF:
- if (!(string = COPY_STRING(PAM_password)))
+ if (!(string = COPY_STRING(PAM_password))) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: passwd failure: --: %s",
+ strerror(errno));
+ /* Log Entry */
goto pam_fail_conv;
+ }
break;
case PAM_TEXT_INFO:
#ifdef PAM_BINARY_PROMPT
case PAM_BINARY_PROMPT:
-#endif
+#endif /* PAM_BINARY_PROMPT */
/* ignore it... */
break;
case PAM_ERROR_MSG:
default:
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Binary_Prompt -- %s",
+ strerror(errno));
+ /* Log Entry */
goto pam_fail_conv;
}
}
*resp = reply;
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: PAM Success");
+ /* Log Entry */
return PAM_SUCCESS;
pam_fail_conv:
}
}
free(reply);
- return PAM_CONV_ERR;
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM DHX Conversation Err -- %s",
+ strerror(errno));
+ /* Log Entry */
+ return PAM_CONV_ERR;
}
static struct pam_conv PAM_conversation = {
};
-static int dhx_setup(void *obj, char *ibuf, int ibuflen,
+static int dhx_setup(void *obj, char *ibuf, int ibuflen _U_,
char *rbuf, int *rbuflen)
{
u_int16_t sessid;
DH *dh;
/* get the client's public key */
- if (!(bn = BN_bin2bn(ibuf, KEYSIZE, NULL)))
+ if (!(bn = BN_bin2bn(ibuf, KEYSIZE, NULL))) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM No Public Key -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
+ }
/* get our primes */
if (!(gbn = BN_bin2bn(&g, sizeof(g), NULL))) {
BN_clear_free(bn);
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM No Primes: GBN -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
}
if (!(pbn = BN_bin2bn(p, sizeof(p), NULL))) {
BN_free(gbn);
BN_clear_free(bn);
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM No Primes: PBN -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
}
BN_free(pbn);
BN_free(gbn);
BN_clear_free(bn);
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM DH was equal to DH_New... Go figure... -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
}
/* generate key and make sure that we have enough space */
dh->p = pbn;
dh->g = gbn;
- if (!DH_generate_key(dh) || (BN_num_bytes(dh->pub_key) > KEYSIZE)) {
- goto pam_fail;
+ if (DH_generate_key(dh) == 0) {
+ unsigned long dherror;
+ char errbuf[256];
+
+ ERR_load_crypto_strings();
+ dherror = ERR_get_error();
+ ERR_error_string_n(dherror, errbuf, 256);
+
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Err Generating Key (OpenSSL error code: %u, %s)", dherror, errbuf);
+
+ ERR_free_strings();
+ goto pam_fail;
+ }
+ if (BN_num_bytes(dh->pub_key) > KEYSIZE) {
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Err Generating Key -- Not enough Space? -- %s", strerror(errno));
+ goto pam_fail;
}
/* figure out the key. store the key in rbuf for now. */
if (uam_afpserver_option(obj, UAM_OPTION_RANDNUM, (void *) randbuf,
&i) < 0) {
*rbuflen = 0;
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Buffer Encryption Err. -- %s",
+ strerror(errno));
+ /* Log Entry */
goto pam_fail;
}
memcpy(rbuf, &randbuf, sizeof(randbuf));
if (uam_afpserver_option(obj, UAM_OPTION_SIGNATURE,
(void *) &buf, NULL) < 0) {
*rbuflen = 0;
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Signature Retieval Failure -- %s",
+ strerror(errno));
+ /* Log Entry */
goto pam_fail;
}
memcpy(rbuf + KEYSIZE, buf, KEYSIZE);
-#else
+#else /* 0 */
memset(rbuf + KEYSIZE, 0, KEYSIZE);
-#endif
+#endif /* 0 */
/* encrypt using cast */
CAST_cbc_encrypt(rbuf, rbuf, CRYPTBUFLEN, &castkey, msg2_iv,
pam_fail:
BN_free(bn);
DH_free(dh);
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Fail - Cast Encryption -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
}
+/* -------------------------------- */
+static int login(void *obj, char *username, int ulen, struct passwd **uam_pwd _U_,
+ char *ibuf, int ibuflen,
+ char *rbuf, int *rbuflen)
+{
+ if (( dhxpwd = uam_getname(obj, username, ulen)) == NULL ) {
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c: unknown username");
+ return AFPERR_PARAM;
+ }
+
+ PAM_username = username;
+ LOG(log_info, logtype_uams, "dhx login: %s", username);
+ return dhx_setup(obj, ibuf, ibuflen, rbuf, rbuflen);
+}
+/* -------------------------------- */
/* dhx login: things are done in a slightly bizarre order to avoid
* having to clean things up if there's an error. */
static int pam_login(void *obj, struct passwd **uam_pwd,
char *ibuf, int ibuflen,
char *rbuf, int *rbuflen)
{
- char *buf;
- int len, i;
+ char *username;
+ int len, ulen;
*rbuflen = 0;
/* grab some of the options */
- if (uam_afpserver_option(obj, UAM_OPTION_USERNAME, (void *) &buf,
- &i) < 0)
- return AFPERR_PARAM;
+ if (uam_afpserver_option(obj, UAM_OPTION_USERNAME, (void *) &username, &ulen) < 0) {
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: uam_afpserver_option didn't meet uam_option_username -- %s",
+ strerror(errno));
+ return AFPERR_PARAM;
+ }
len = (unsigned char) *ibuf++;
- if ( len > i ) {
- return( AFPERR_PARAM );
+ if ( len > ulen ) {
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Signature Retieval Failure -- %s",
+ strerror(errno));
+ return AFPERR_PARAM;
}
- memcpy(buf, ibuf, len );
+ memcpy(username, ibuf, len );
ibuf += len;
- buf[ len ] = '\0';
+ username[ len ] = '\0';
+
if ((unsigned long) ibuf & 1) /* pad to even boundary */
++ibuf;
- if (( dhxpwd = uam_getname(buf, i)) == NULL ) {
+ return (login(obj, username, ulen, uam_pwd, ibuf, ibuflen, rbuf, rbuflen));
+}
+
+/* ----------------------------- */
+static int pam_login_ext(void *obj, char *uname, struct passwd **uam_pwd,
+ char *ibuf, int ibuflen,
+ char *rbuf, int *rbuflen)
+{
+ char *username;
+ int len, ulen;
+ u_int16_t temp16;
+
+ *rbuflen = 0;
+
+ /* grab some of the options */
+ if (uam_afpserver_option(obj, UAM_OPTION_USERNAME, (void *) &username, &ulen) < 0) {
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: uam_afpserver_option didn't meet uam_option_username -- %s",
+ strerror(errno));
+ return AFPERR_PARAM;
+ }
+
+ if (*uname != 3)
+ return AFPERR_PARAM;
+ uname++;
+ memcpy(&temp16, uname, sizeof(temp16));
+ len = ntohs(temp16);
+
+ if ( !len || len > ulen ) {
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Signature Retrieval Failure -- %s",
+ strerror(errno));
return AFPERR_PARAM;
}
+ memcpy(username, uname +2, len );
+ username[ len ] = '\0';
- PAM_username = buf;
- syslog( LOG_INFO, "dhx login: %s", buf);
- return dhx_setup(obj, ibuf, ibuflen, rbuf, rbuflen);
+ return (login(obj, username, ulen, uam_pwd, ibuf, ibuflen, rbuf, rbuflen));
}
+/* -------------------------------- */
static int pam_logincont(void *obj, struct passwd **uam_pwd,
- char *ibuf, int ibuflen,
+ char *ibuf, int ibuflen _U_,
char *rbuf, int *rbuflen)
{
char *hostname;
/* check for session id */
memcpy(&sessid, ibuf, sizeof(sessid));
- if (sessid != dhxhash(obj))
+ if (sessid != dhxhash(obj)) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM Session ID - DHXHash Mismatch -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
+ }
ibuf += sizeof(sessid);
- if (uam_afpserver_option(obj, UAM_OPTION_HOSTNAME,
+ if (uam_afpserver_option(obj, UAM_OPTION_CLIENTNAME,
(void *) &hostname, NULL) < 0)
- return AFPERR_MISC;
+ {
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: unable to retrieve client hostname");
+ hostname = NULL;
+ }
CAST_cbc_encrypt(ibuf, rbuf, CRYPT2BUFLEN, &castkey,
msg3_iv, CAST_DECRYPT);
err = AFPERR_NOTAUTH;
PAM_error = pam_start("netatalk", PAM_username, &PAM_conversation,
&pamh);
- if (PAM_error != PAM_SUCCESS)
+ if (PAM_error != PAM_SUCCESS) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: PAM_Error: %s",
+ pam_strerror(pamh,PAM_error));
+ /* Log Entry */
goto logincont_err;
+ }
/* solaris craps out if PAM_TTY and PAM_RHOST aren't set. */
pam_set_item(pamh, PAM_TTY, "afpd");
if (PAM_error != PAM_SUCCESS) {
if (PAM_error == PAM_MAXTRIES)
err = AFPERR_PWDEXPR;
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: PAM_Error: %s",
+ pam_strerror(pamh, PAM_error));
+ /* Log Entry */
goto logincont_err;
}
PAM_error = pam_acct_mgmt(pamh, 0);
- if (PAM_error != PAM_SUCCESS) {
- if (PAM_error == PAM_ACCT_EXPIRED)
+ if (PAM_error != PAM_SUCCESS ) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: PAM_Error: %s",
+ pam_strerror(pamh, PAM_error));
+ /* Log Entry */
+ if (PAM_error == PAM_NEW_AUTHTOK_REQD) /* password expired */
err = AFPERR_PWDEXPR;
#ifdef PAM_AUTHTOKEN_REQD
else if (PAM_error == PAM_AUTHTOKEN_REQD)
err = AFPERR_PWDCHNG;
#endif
- goto logincont_err;
+ else
+ goto logincont_err;
}
#ifndef PAM_CRED_ESTABLISH
#define PAM_CRED_ESTABLISH PAM_ESTABLISH_CRED
#endif
PAM_error = pam_setcred(pamh, PAM_CRED_ESTABLISH);
- if (PAM_error != PAM_SUCCESS)
+ if (PAM_error != PAM_SUCCESS) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: PAM_Error: %s",
+ pam_strerror(pamh, PAM_error));
+ /* Log Entry */
goto logincont_err;
+ }
PAM_error = pam_open_session(pamh, 0);
- if (PAM_error != PAM_SUCCESS)
+ if (PAM_error != PAM_SUCCESS) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: PAM_Error: %s",
+ pam_strerror(pamh, PAM_error));
+ /* Log Entry */
goto logincont_err;
+ }
memset(rbuf, 0, PASSWDLEN); /* zero out the password */
*uam_pwd = dhxpwd;
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: PAM Auth OK!");
+ /* Log Entry */
+ if ( err == AFPERR_PWDEXPR)
+ return err;
return AFP_OK;
logincont_err:
/* change pw for dhx needs a couple passes to get everything all
* right. basically, it's like the login/logincont sequence */
static int pam_changepw(void *obj, char *username,
- struct passwd *pwd, char *ibuf, int ibuflen,
+ struct passwd *pwd _U_, char *ibuf, int ibuflen,
char *rbuf, int *rbuflen)
{
BIGNUM *bn1, *bn2, *bn3;
/* otherwise, it's like logincont but different. */
/* check out the session id */
- if (sessid != dhxhash(obj))
+ if (sessid != dhxhash(obj)) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Session ID not Equal to DHX Hash -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
+ }
/* we need this for pam */
if (uam_afpserver_option(obj, UAM_OPTION_HOSTNAME,
- (void *) &hostname, NULL) < 0)
+ (void *) &hostname, NULL) < 0) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Hostname Null?? -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_MISC;
+ }
/* grab the client's nonce, old password, and new password. */
CAST_cbc_encrypt(ibuf, ibuf, CHANGEPWBUFLEN, &castkey,
/* check to make sure that the random number is the same. we
* get sent back an incremented random number. */
- if (!(bn1 = BN_bin2bn(ibuf, KEYSIZE, NULL)))
+ if (!(bn1 = BN_bin2bn(ibuf, KEYSIZE, NULL))) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Random Number Not the same or not incremented-- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
+ }
if (!(bn2 = BN_bin2bn(randbuf, sizeof(randbuf), NULL))) {
BN_free(bn1);
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Random Number Not the same or not incremented -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
}
if (!(bn3 = BN_new())) {
BN_free(bn2);
BN_free(bn1);
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Random Number did not Zero -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
}
#if 0
if (!BN_is_one(bn3)) {
BN_free(bn3);
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: After Random Number not Zero, is it one more? -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
}
#endif
PAM_error = pam_start("netatalk", username, &PAM_conversation,
&lpamh);
- if (PAM_error != PAM_SUCCESS)
+ if (PAM_error != PAM_SUCCESS) {
+ /* Log Entry */
+ LOG(log_info, logtype_uams, "uams_dhx_pam.c :PAM: Needless to say, PAM_error is != to PAM_SUCCESS -- %s",
+ strerror(errno));
+ /* Log Entry */
return AFPERR_PARAM;
+ }
pam_set_item(lpamh, PAM_TTY, "afpd");
pam_set_item(lpamh, PAM_RHOST, hostname);
static int uam_setup(const char *path)
{
- if (uam_register(UAM_SERVER_LOGIN, path, "DHCAST128", pam_login,
- pam_logincont, pam_logout) < 0)
+ if (uam_register(UAM_SERVER_LOGIN_EXT, path, "DHCAST128", pam_login,
+ pam_logincont, pam_logout, pam_login_ext) < 0)
return -1;
if (uam_register(UAM_SERVER_CHANGEPW, path, "DHCAST128",
uam_setup, uam_cleanup
};
+UAM_MODULE_EXPORT struct uam_export uams_dhx_pam = {
+ UAM_MODULE_SERVER,
+ UAM_MODULE_VERSION,
+ uam_setup, uam_cleanup
+};
+
#endif /* USE_PAM && UAM_DHX */
+
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