* libmisc/non_interactive_pam_conv.c,

libmisc/pam_pass_non_interractive.c, libmisc/Makefile.am: Renamed.
	* libmisc/pam_pass_non_interractive.c, lib/prototypes.h:
	non_interactive_password and non_interactive_pam_conv do not need
	to be externally visible.
	* libmisc/pam_pass_non_interractive.c: Added declaration of
	ni_conv.
	* libmisc/pam_pass_non_interractive.c: Only compile ifdef USE_PAM.
	* libmisc/pam_pass_non_interractive.c, lib/prototypes.h:
	Added do_pam_passwd_non_interractive().
	* src/chpasswd.c: Use do_pam_passwd_non_interractive().

libmisc/pam_pass_non_interractive.c

@@ -0,0 +1,165 @@
+/*
+ * Copyright (c)        2009, 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 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_interractive (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);
+}
+#else				/* !USE_PAM */
+extern int errno;		/* warning: ANSI C forbids an empty source file */
+#endif				/* !USE_PAM */