#include "includes.h"
-#ifndef HAVE_PAM
+#ifndef USE_PAM
RCSID("$Id$");
#include "xmalloc.h"
#ifdef HAVE_SHADOW_H
-#include <shadow.h>
-#endif
-
-#ifdef HAVE_MD5_PASSWORDS
-#include "md5crypt.h"
+# include <shadow.h>
#endif
+#if defined(HAVE_CRYPT_H) && !defined(CRYPT_H_BREAKS_BUILD)
+# include <crypt.h>
+#endif /* defined(HAVE_CRYPT_H) && !defined(CRYPT_H_BREAKS_BUILD) */
+#if defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT)
+# include "md5crypt.h"
+#endif /* defined(HAVE_MD5_PASSWORDS) && !defined(HAVE_MD5_CRYPT) */
/*
* Tries to authenticate the user using password. Returns true if
{
extern ServerOptions options;
char *encrypted_password;
+ char *pw_password;
+ char *salt;
#ifdef HAVE_SHADOW_H
struct spwd *spw;
#endif
- if (pw->pw_uid == 0 && options.permit_root_login == 2) {
- /* Server does not permit root login with password */
- return 0;
- }
- if (*password == '\0' && options.permit_empty_passwd == 0) {
- /* Server does not permit empty password login */
- return 0;
- }
/* deny if no user. */
if (pw == NULL)
return 0;
+ if (pw->pw_uid == 0 && options.permit_root_login == 2)
+ return 0;
+ if (*password == '\0' && options.permit_empty_passwd == 0)
+ return 0;
#ifdef SKEY
if (options.skey_authentication == 1) {
- if (strncasecmp(password, "s/key", 5) == 0) {
- char *skeyinfo = skey_keyinfo(pw->pw_name);
- if (skeyinfo == NULL) {
- debug("generating fake skeyinfo for %.100s.",
- pw->pw_name);
- skeyinfo = skey_fake_keyinfo(pw->pw_name);
- }
- if (skeyinfo != NULL)
- packet_send_debug(skeyinfo);
- /* Try again. */
- return 0;
- } else if (skey_haskey(pw->pw_name) == 0 &&
- skey_passcheck(pw->pw_name, (char *) password) != -1) {
- /* Authentication succeeded. */
- return 1;
- }
+ int ret = auth_skey_password(pw, password);
+ if (ret == 1 || ret == 0)
+ return ret;
/* Fall back to ordinary passwd authentication. */
}
#endif
-
-#if defined(KRB4)
- /* Support for Kerberos v4 authentication - Dug Song
- <dugsong@UMICH.EDU> */
- if (options.kerberos_authentication) {
- AUTH_DAT adata;
- KTEXT_ST tkt;
- struct hostent *hp;
- unsigned long faddr;
- char localhost[MAXHOSTNAMELEN];
- char phost[INST_SZ];
- char realm[REALM_SZ];
- int r;
-
- /* Try Kerberos password authentication only for non-root
- users and only if Kerberos is installed. */
- if (pw->pw_uid != 0 && krb_get_lrealm(realm, 1) == KSUCCESS) {
-
- /* Set up our ticket file. */
- if (!krb4_init(pw->pw_uid)) {
- log("Couldn't initialize Kerberos ticket file for %s!",
- pw->pw_name);
- goto kerberos_auth_failure;
- }
- /* Try to get TGT using our password. */
- r = krb_get_pw_in_tkt((char *) pw->pw_name, "",
- realm, "krbtgt", realm,
- DEFAULT_TKT_LIFE, (char *) password);
- if (r != INTK_OK) {
- packet_send_debug("Kerberos V4 password "
- "authentication for %s failed: %s",
- pw->pw_name, krb_err_txt[r]);
- goto kerberos_auth_failure;
- }
- /* Successful authentication. */
- chown(tkt_string(), pw->pw_uid, pw->pw_gid);
-
- /*
- * Now that we have a TGT, try to get a local
- * "rcmd" ticket to ensure that we are not talking
- * to a bogus Kerberos server.
- */
- (void) gethostname(localhost, sizeof(localhost));
- (void) strlcpy(phost, (char *) krb_get_phost(localhost),
- INST_SZ);
- r = krb_mk_req(&tkt, KRB4_SERVICE_NAME, phost, realm, 33);
-
- if (r == KSUCCESS) {
- if (!(hp = gethostbyname(localhost))) {
- log("Couldn't get local host address!");
- goto kerberos_auth_failure;
- }
- memmove((void *) &faddr, (void *) hp->h_addr,
- sizeof(faddr));
-
- /* Verify our "rcmd" ticket. */
- r = krb_rd_req(&tkt, KRB4_SERVICE_NAME, phost,
- faddr, &adata, "");
- if (r == RD_AP_UNDEC) {
- /*
- * Probably didn't have a srvtab on
- * localhost. Allow login.
- */
- log("Kerberos V4 TGT for %s unverifiable, "
- "no srvtab installed? krb_rd_req: %s",
- pw->pw_name, krb_err_txt[r]);
- } else if (r != KSUCCESS) {
- log("Kerberos V4 %s ticket unverifiable: %s",
- KRB4_SERVICE_NAME, krb_err_txt[r]);
- goto kerberos_auth_failure;
- }
- } else if (r == KDC_PR_UNKNOWN) {
- /* Allow login if no rcmd service exists,
- but log the error. */
- log("Kerberos V4 TGT for %s unverifiable: %s; %s.%s "
- "not registered, or srvtab is wrong?", pw->pw_name,
- krb_err_txt[r], KRB4_SERVICE_NAME, phost);
- } else {
- /* TGT is bad, forget it. Possibly
- spoofed! */
- packet_send_debug("WARNING: Kerberos V4 TGT "
- "possibly spoofed for %s: %s",
- pw->pw_name, krb_err_txt[r]);
- goto kerberos_auth_failure;
- }
-
- /* Authentication succeeded. */
- return 1;
-
- kerberos_auth_failure:
- krb4_cleanup_proc(NULL);
-
- if (!options.kerberos_or_local_passwd)
- return 0;
- } else {
- /* Logging in as root or no local Kerberos realm. */
- packet_send_debug("Unable to authenticate to Kerberos.");
- }
+#ifdef KRB4
+ if (options.kerberos_authentication == 1) {
+ int ret = auth_krb4_password(pw, password);
+ if (ret == 1 || ret == 0)
+ return ret;
/* Fall back to ordinary passwd authentication. */
}
-#endif /* KRB4 */
+#endif
/* Check for users with no password. */
- if (strcmp(password, "") == 0 && strcmp(pw->pw_passwd, "") == 0) {
- packet_send_debug("Login permitted without a password "
- "because the account has no password.");
+ if (strcmp(password, "") == 0 && strcmp(pw->pw_passwd, "") == 0)
return 1;
- }
-#ifdef HAVE_SHADOW_H
+ pw_password = pw->pw_passwd;
+
+#if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW)
spw = getspnam(pw->pw_name);
- if (spw == NULL)
- return(0);
+ if (spw != NULL)
+ {
+ /* Check for users with no password. */
+ if (strcmp(password, "") == 0 && strcmp(spw->sp_pwdp, "") == 0)
+ return 1;
- if ((spw->sp_namp == NULL) || (strcmp(pw->pw_name, spw->sp_namp) != 0))
- fatal("Shadow lookup returned garbage.");
+ pw_password = spw->sp_pwdp;
+ }
+#endif /* defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) */
- if (strlen(spw->sp_pwdp) < 3)
- return(0);
+ if (pw_password[0] != '\0')
+ salt = pw_password;
+ else
+ salt = "xx";
- /* Encrypt the candidate password using the proper salt. */
#ifdef HAVE_MD5_PASSWORDS
- if (is_md5_salt(spw->sp_pwdp))
- encrypted_password = md5_crypt(password, spw->sp_pwdp);
+ if (is_md5_salt(salt))
+ encrypted_password = md5_crypt(password, salt);
else
- encrypted_password = crypt(password, spw->sp_pwdp);
+ encrypted_password = crypt(password, salt);
#else /* HAVE_MD5_PASSWORDS */
- encrypted_password = crypt(password, spw->sp_pwdp);
+ encrypted_password = crypt(password, salt);
#endif /* HAVE_MD5_PASSWORDS */
- /* Authentication is accepted if the encrypted passwords are identical. */
- return (strcmp(encrypted_password, spw->sp_pwdp) == 0);
-#else /* !HAVE_SHADOW_H */
- encrypted_password = crypt(password,
- (pw->pw_passwd[0] && pw->pw_passwd[1]) ? pw->pw_passwd : "xx");
/* Authentication is accepted if the encrypted passwords are identical. */
- return (strcmp(encrypted_password, pw->pw_passwd) == 0);
-#endif /* !HAVE_SHADOW_H */
+ return (strcmp(encrypted_password, pw_password) == 0);
}
-#endif /* !HAVE_PAM */
+#endif /* !USE_PAM */
andersk / openssh.git / blobdiff