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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved.
*/
#include <stdio.h>
#include "autoconf.h"
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#include <time.h>
#include <string.h>
#include <kadm5/admin.h>
#include "admin_internal.h"
#include <krb5.h>
#define string_text error_message
/*
* Function: kadm5_chpass_principal_util
*
* Purpose: Wrapper around chpass_principal. We can read new pw, change pw and return useful messages
*
* Arguments:
*
* princ (input) a krb5b_principal structure for the
* principal whose password we should change.
*
* new_password (input) NULL or a null terminated string with the
* the principal's desired new password. If new_password
* is NULL then this routine will read a new password.
*
* pw_ret (output) if non-NULL, points to a static buffer
* containing the new password (if password is prompted
* internally), or to the new_password argument (if
* that is non-NULL). If the former, then the buffer
* is only valid until the next call to the function,
* and the caller should be sure to zero it when
* it is no longer needed.
*
* msg_ret (output) a useful message is copied here.
*
* <return value> exit status of 0 for success, else the com err code
* for the last significant routine called.
*
* Requires:
*
* A msg_ret should point to a buffer large enough for the messasge.
*
* Effects:
*
* Modifies:
*
*
*/
kadm5_ret_t _kadm5_chpass_principal_util(void *server_handle,
void *lhandle,
krb5_principal princ,
char *new_pw,
char **ret_pw,
char *msg_ret,
unsigned int msg_len)
{
int code, code2;
unsigned int pwsize;
static char buffer[255];
char *new_password;
kadm5_principal_ent_rec princ_ent;
kadm5_policy_ent_rec policy_ent;
_KADM5_CHECK_HANDLE(server_handle);
if (ret_pw)
*ret_pw = NULL;
if (new_pw != NULL) {
new_password = new_pw;
} else { /* read the password */
krb5_context context;
if ((code = (int) kadm5_init_krb5_context(&context)) == 0) {
pwsize = sizeof(buffer);
code = krb5_read_password(context, KADM5_PW_FIRST_PROMPT,
KADM5_PW_SECOND_PROMPT,
buffer, &pwsize);
krb5_free_context(context);
}
if (code == 0)
new_password = buffer;
else {
#ifdef ZEROPASSWD
memset(buffer, 0, sizeof(buffer));
#endif
if (code == KRB5_LIBOS_BADPWDMATCH) {
strncpy(msg_ret, string_text(CHPASS_UTIL_NEW_PASSWORD_MISMATCH),
msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(code);
} else {
snprintf(msg_ret, msg_len, "%s %s\n\n%s",
error_message(code),
string_text(CHPASS_UTIL_WHILE_READING_PASSWORD),
string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED));
msg_ret[msg_len - 1] = '\0';
return(code);
}
}
if (pwsize == 0) {
#ifdef ZEROPASSWD
memset(buffer, 0, sizeof(buffer));
#endif
strncpy(msg_ret, string_text(CHPASS_UTIL_NO_PASSWORD_READ), msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(KRB5_LIBOS_CANTREADPWD); /* could do better */
}
}
if (ret_pw)
*ret_pw = new_password;
code = kadm5_chpass_principal(server_handle, princ, new_password);
#ifdef ZEROPASSWD
if (!ret_pw)
memset(buffer, 0, sizeof(buffer)); /* in case we read a new password */
#endif
if (code == KADM5_OK) {
strncpy(msg_ret, string_text(CHPASS_UTIL_PASSWORD_CHANGED), msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(0);
}
if ((code != KADM5_PASS_Q_TOOSHORT) &&
(code != KADM5_PASS_REUSE) &&(code != KADM5_PASS_Q_CLASS) &&
(code != KADM5_PASS_Q_DICT) && (code != KADM5_PASS_TOOSOON)) {
/* Can't get more info for other errors */
snprintf(msg_ret, msg_len, "%s\n%s %s\n",
string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED),
error_message(code),
string_text(CHPASS_UTIL_WHILE_TRYING_TO_CHANGE));
return(code);
}
/* Ok, we have a password quality error. Return a good message */
if (code == KADM5_PASS_REUSE) {
strncpy(msg_ret, string_text(CHPASS_UTIL_PASSWORD_REUSE), msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(code);
}
if (code == KADM5_PASS_Q_DICT) {
strncpy(msg_ret, string_text(CHPASS_UTIL_PASSWORD_IN_DICTIONARY),
msg_len - 1);
msg_ret[msg_len - 1] = '\0';
return(code);
}
/* Look up policy for the remaining messages */
code2 = kadm5_get_principal (lhandle, princ, &princ_ent,
KADM5_PRINCIPAL_NORMAL_MASK);
if (code2 != 0) {
snprintf(msg_ret, msg_len, "%s %s\n%s %s\n\n%s\n",
error_message(code2),
string_text(CHPASS_UTIL_GET_PRINC_INFO),
error_message(code),
string_text(CHPASS_UTIL_WHILE_TRYING_TO_CHANGE),
string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED));
msg_ret[msg_len - 1] = '\0';
return(code);
}
if ((princ_ent.aux_attributes & KADM5_POLICY) == 0) {
/* Some module implements its own password policy. */
snprintf(msg_ret, msg_len, "%s\n\n%s",
error_message(code),
string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED));
msg_ret[msg_len - 1] = '\0';
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
return(code);
}
code2 = kadm5_get_policy(lhandle, princ_ent.policy,
&policy_ent);
if (code2 != 0) {
snprintf(msg_ret, msg_len, "%s %s\n%s %s\n\n%s\n ", error_message(code2),
string_text(CHPASS_UTIL_GET_POLICY_INFO),
error_message(code),
string_text(CHPASS_UTIL_WHILE_TRYING_TO_CHANGE),
string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED));
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
return(code);
}
if (code == KADM5_PASS_Q_TOOSHORT) {
snprintf(msg_ret, msg_len, string_text(CHPASS_UTIL_PASSWORD_TOO_SHORT),
policy_ent.pw_min_length);
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
(void) kadm5_free_policy_ent(lhandle, &policy_ent);
return(code);
}
/* Can't get more info for other errors */
if (code == KADM5_PASS_Q_CLASS) {
snprintf(msg_ret, msg_len, string_text(CHPASS_UTIL_TOO_FEW_CLASSES),
policy_ent.pw_min_classes);
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
(void) kadm5_free_policy_ent(lhandle, &policy_ent);
return(code);
}
if (code == KADM5_PASS_TOOSOON) {
time_t until;
char *time_string, *ptr;
until = princ_ent.last_pwd_change + policy_ent.pw_min_life;
time_string = ctime(&until);
if (*(ptr = &time_string[strlen(time_string)-1]) == '\n')
*ptr = '\0';
snprintf(msg_ret, msg_len, string_text(CHPASS_UTIL_PASSWORD_TOO_SOON),
time_string);
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
(void) kadm5_free_policy_ent(lhandle, &policy_ent);
return(code);
}
/* We should never get here, but just in case ... */
snprintf(msg_ret, msg_len, "%s\n%s %s\n",
string_text(CHPASS_UTIL_PASSWORD_NOT_CHANGED),
error_message(code),
string_text(CHPASS_UTIL_WHILE_TRYING_TO_CHANGE));
(void) kadm5_free_principal_ent(lhandle, &princ_ent);
(void) kadm5_free_policy_ent(lhandle, &policy_ent);
return(code);
}
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