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-rw-r--r--libmisc/pam_pass_non_interactive.c167
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diff --git a/libmisc/pam_pass_non_interactive.c b/libmisc/pam_pass_non_interactive.c
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+++ b/libmisc/pam_pass_non_interactive.c
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+/*
+ * Copyright (c) 2009 - 2010, Nicolas François
+ * 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. The name of the copyright holders or contributors may not be used to
+ * endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
+ * HOLDERS 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.
+ */
+
+#include <config.h>
+
+#ident "$Id:$"
+
+#ifdef USE_PAM
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <security/pam_appl.h>
+#include "prototypes.h"
+
+/*@null@*/ /*@only@*/static const char *non_interactive_password = NULL;
+static int ni_conv (int num_msg,
+ const struct pam_message **msg,
+ struct pam_response **resp,
+ unused void *appdata_ptr);
+static struct pam_conv non_interactive_pam_conv = {
+ ni_conv,
+ NULL
+};
+
+
+
+static int ni_conv (int num_msg,
+ const struct pam_message **msg,
+ struct pam_response **resp,
+ unused void *appdata_ptr)
+{
+ struct pam_response *responses;
+ int count;
+
+ assert (NULL != non_interactive_password);
+
+ if (num_msg <= 0) {
+ return PAM_CONV_ERR;
+ }
+
+ responses = (struct pam_response *) calloc ((size_t) num_msg,
+ sizeof (*responses));
+ if (NULL == responses) {
+ return PAM_CONV_ERR;
+ }
+
+ for (count=0; count < num_msg; count++) {
+ responses[count].resp_retcode = 0;
+
+ switch (msg[count]->msg_style) {
+ case PAM_PROMPT_ECHO_ON:
+ fprintf (stderr,
+ _("%s: PAM modules requesting echoing are not supported.\n"),
+ Prog);
+ goto failed_conversation;
+ case PAM_PROMPT_ECHO_OFF:
+ responses[count].resp = strdup (non_interactive_password);
+ if (NULL == responses[count].resp) {
+ goto failed_conversation;
+ }
+ break;
+ case PAM_ERROR_MSG:
+ if ( (NULL == msg[count]->msg)
+ || (fprintf (stderr, "%s\n", msg[count]->msg) <0)) {
+ goto failed_conversation;
+ }
+ responses[count].resp = NULL;
+ break;
+ case PAM_TEXT_INFO:
+ if ( (NULL == msg[count]->msg)
+ || (fprintf (stdout, "%s\n", msg[count]->msg) <0)) {
+ goto failed_conversation;
+ }
+ responses[count].resp = NULL;
+ break;
+ default:
+ (void) fprintf (stderr,
+ _("%s: conversation type %d not supported.\n"),
+ Prog, msg[count]->msg_style);
+ goto failed_conversation;
+ }
+ }
+
+ *resp = responses;
+
+ return PAM_SUCCESS;
+
+failed_conversation:
+ for (count=0; count < num_msg; count++) {
+ if (NULL != responses[count].resp) {
+ memset (responses[count].resp, 0,
+ strlen (responses[count].resp));
+ free (responses[count].resp);
+ responses[count].resp = NULL;
+ }
+ }
+
+ free (responses);
+ *resp = NULL;
+
+ return PAM_CONV_ERR;
+}
+
+
+/*
+ * Change non interactively the user's password using PAM.
+ *
+ * Return 0 on success, 1 on failure.
+ */
+int do_pam_passwd_non_interactive (const char *pam_service,
+ const char *username,
+ const char* password)
+{
+ pam_handle_t *pamh = NULL;
+ int ret;
+
+ ret = pam_start (pam_service, username, &non_interactive_pam_conv, &pamh);
+ if (ret != PAM_SUCCESS) {
+ fprintf (stderr,
+ _("%s: (user %s) pam_start failure %d\n"),
+ Prog, username, ret);
+ return 1;
+ }
+
+ non_interactive_password = password;
+ ret = pam_chauthtok (pamh, 0);
+ if (ret != PAM_SUCCESS) {
+ fprintf (stderr,
+ _("%s: (user %s) pam_chauthtok() failed, error:\n"
+ "%s\n"),
+ Prog, username, pam_strerror (pamh, ret));
+ }
+
+ (void) pam_end (pamh, PAM_SUCCESS);
+
+ return ((PAM_SUCCESS == ret) ? 0 : 1);
+}
+#else /* !USE_PAM */
+extern int errno; /* warning: ANSI C forbids an empty source file */
+#endif /* !USE_PAM */