/*
- * Copyright (c) 1999-2005 Todd C. Miller <Todd.Miller@courtesan.com>
+ * Copyright (c) 1999-2005, 2007-2009 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <pwd.h>
+#include <errno.h>
#ifdef HAVE_PAM_PAM_APPL_H
# include <pam/pam_appl.h>
# include <security/pam_appl.h>
#endif
+#ifdef HAVE_DGETTEXT
+# include <libintl.h>
+# if defined(__LINUX_PAM__)
+# define PAM_TEXT_DOMAIN "Linux-PAM"
+# elif defined(__sun__)
+# define PAM_TEXT_DOMAIN "SUNW_OST_SYSOSPAM"
+# endif
+#endif
+
#include "sudo.h"
#include "sudo_auth.h"
/* Only OpenPAM and Linux PAM use const qualifiers. */
-#if defined(_OPENPAM) || defined(__LIBPAM_VERSION) || defined(__LINUX_PAM__)
+#if defined(_OPENPAM) || defined(OPENPAM_VERSION) || \
+ defined(__LIBPAM_VERSION) || defined(__LINUX_PAM__)
# define PAM_CONST const
#else
# define PAM_CONST
#endif
-#ifndef lint
-__unused static const char rcsid[] = "$Sudo: pam.c,v 1.43.2.7 2007/10/09 00:06:06 millert Exp $";
-#endif /* lint */
-
static int sudo_conv __P((int, PAM_CONST struct pam_message **,
- struct pam_response **, VOID *));
-static char *def_prompt;
+ struct pam_response **, void *));
+static char *def_prompt = "Password:";
+static int gotintr;
#ifndef PAM_DATA_SILENT
#define PAM_DATA_SILENT 0
/* Initial PAM setup */
if (auth != NULL)
- auth->data = (VOID *) &pam_status;
+ auth->data = (void *) &pam_status;
pam_conv.conv = sudo_conv;
pam_status = pam_start("sudo", pw->pw_name, &pam_conv, &pamh);
if (pam_status != PAM_SUCCESS) {
log_error(USE_ERRNO|NO_EXIT|NO_MAIL, "unable to initialize PAM");
return(AUTH_FATAL);
}
+
+ /*
+ * Set PAM_RUSER to the invoking user (the "from" user).
+ * We set PAM_RHOST to avoid a bug in Solaris 7 and below.
+ */
+ (void) pam_set_item(pamh, PAM_RUSER, user_name);
+ (void) pam_set_item(pamh, PAM_RHOST, user_host);
+
/*
* Some versions of pam_lastlog have a bug that
* will cause a crash if PAM_TTY is not set so if
}
/* FALLTHROUGH */
case PAM_AUTH_ERR:
+ if (gotintr) {
+ /* error or ^C from tgetpass() */
+ return(AUTH_INTR);
+ }
case PAM_MAXTRIES:
case PAM_PERM_DENIED:
return(AUTH_FAILURE);
pam_init(pw, NULL, NULL);
/*
- * Set PAM_USER to the user we are changing *to* and
- * set PAM_RUSER to the user we are coming *from*.
- * We set PAM_RHOST to avoid a bug in Solaris 7 and below.
+ * Update PAM_USER to reference the user we are running the command
+ * as, as opposed to the user we authenticated as.
*/
(void) pam_set_item(pamh, PAM_USER, pw->pw_name);
- (void) pam_set_item(pamh, PAM_RUSER, user_name);
- (void) pam_set_item(pamh, PAM_RHOST, user_host);
/*
* Set credentials (may include resource limits, device ownership, etc).
int num_msg;
PAM_CONST struct pam_message **msg;
struct pam_response **response;
- VOID *appdata_ptr;
+ void *appdata_ptr;
{
struct pam_response *pr;
PAM_CONST struct pam_message *pm;
- const char *p = def_prompt;
+ const char *prompt;
char *pass;
- int n, flags;
- extern int nil_pw;
+ int n, flags, std_prompt;
if ((*response = malloc(num_msg * sizeof(struct pam_response))) == NULL)
- return(PAM_CONV_ERR);
+ return(PAM_SYSTEM_ERR);
zero_bytes(*response, num_msg * sizeof(struct pam_response));
for (pr = *response, pm = *msg, n = num_msg; n--; pr++, pm++) {
case PAM_PROMPT_ECHO_ON:
SET(flags, TGP_ECHO);
case PAM_PROMPT_ECHO_OFF:
+ prompt = def_prompt;
+
+ /* Is the sudo prompt standard? (If so, we'l just use PAM's) */
+ std_prompt = strncmp(def_prompt, "Password:", 9) == 0 &&
+ (def_prompt[9] == '\0' ||
+ (def_prompt[9] == ' ' && def_prompt[10] == '\0'));
+
/* Only override PAM prompt if it matches /^Password: ?/ */
- if (strncmp(pm->msg, "Password:", 9) || (pm->msg[9] != '\0'
- && (pm->msg[9] != ' ' || pm->msg[10] != '\0')))
- p = pm->msg;
- /* Read the password. */
- pass = tgetpass(p, def_passwd_timeout * 60, flags);
+#if defined(PAM_TEXT_DOMAIN) && defined(HAVE_DGETTEXT)
+ if (!def_passprompt_override && (std_prompt ||
+ (strcmp(pm->msg, dgettext(PAM_TEXT_DOMAIN, "Password: ")) &&
+ strcmp(pm->msg, dgettext(PAM_TEXT_DOMAIN, "Password:")))))
+ prompt = pm->msg;
+#else
+ if (!def_passprompt_override && (std_prompt ||
+ strncmp(pm->msg, "Password:", 9) || (pm->msg[9] != '\0'
+ && (pm->msg[9] != ' ' || pm->msg[10] != '\0'))))
+ prompt = pm->msg;
+#endif
+ /* Read the password unless interrupted. */
+ pass = tgetpass(prompt, def_passwd_timeout * 60, flags);
if (pass == NULL) {
/* We got ^C instead of a password; abort quickly. */
- nil_pw = 1;
+ if (errno == EINTR)
+ gotintr = 1;
+#if defined(__darwin__) || defined(__APPLE__)
+ pass = "";
+#else
goto err;
+#endif
}
pr->resp = estrdup(pass);
- if (*pr->resp == '\0')
- nil_pw = 1; /* empty password */
- else
- zero_bytes(pass, strlen(pass));
+ zero_bytes(pass, strlen(pass));
break;
case PAM_TEXT_INFO:
if (pm->msg)
zero_bytes(*response, num_msg * sizeof(struct pam_response));
free(*response);
*response = NULL;
- return(PAM_CONV_ERR);
+ return(gotintr ? PAM_AUTH_ERR : PAM_CONV_ERR);
}
projects / debian / sudo / blobdiff