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-rw-r--r--lib/sgetspent.c187
1 files changed, 187 insertions, 0 deletions
diff --git a/lib/sgetspent.c b/lib/sgetspent.c
new file mode 100644
index 0000000..f1d4b20
--- /dev/null
+++ b/lib/sgetspent.c
@@ -0,0 +1,187 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2009 , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+/* Newer versions of Linux libc already have shadow support. */
+#ifndef HAVE_SGETSPENT
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include "prototypes.h"
+#include "shadowlog_internal.h"
+#include "defines.h"
+#include <stdio.h>
+#define FIELDS 9
+#define OFIELDS 5
+/*
+ * sgetspent - convert string in shadow file format to (struct spwd *)
+ */
+struct spwd *sgetspent (const char *string)
+{
+ static char spwbuf[PASSWD_ENTRY_MAX_LENGTH];
+ static struct spwd spwd;
+ char *fields[FIELDS];
+ char *cp;
+ int i;
+
+ /*
+ * Copy string to local buffer. It has to be tokenized and we
+ * have to do that to our private copy.
+ */
+
+ if (strlen (string) >= sizeof spwbuf) {
+ fprintf (shadow_logfd,
+ "%s: Too long passwd entry encountered, file corruption?\n",
+ shadow_progname);
+ return 0; /* fail if too long */
+ }
+ strcpy (spwbuf, string);
+
+ cp = strrchr (spwbuf, '\n');
+ if (NULL != cp) {
+ *cp = '\0';
+ }
+
+ /*
+ * Tokenize the string into colon separated fields. Allow up to
+ * FIELDS different fields.
+ */
+
+ for (cp = spwbuf, i = 0; ('\0' != *cp) && (i < FIELDS); i++) {
+ fields[i] = cp;
+ while (('\0' != *cp) && (':' != *cp)) {
+ cp++;
+ }
+
+ if ('\0' != *cp) {
+ *cp = '\0';
+ cp++;
+ }
+ }
+
+ if (i == (FIELDS - 1)) {
+ fields[i++] = cp;
+ }
+
+ if ( ((NULL != cp) && ('\0' != *cp)) ||
+ ((i != FIELDS) && (i != OFIELDS)) ) {
+ return 0;
+ }
+
+ /*
+ * Start populating the structure. The fields are all in
+ * static storage, as is the structure we pass back.
+ */
+
+ spwd.sp_namp = fields[0];
+ spwd.sp_pwdp = fields[1];
+
+ /*
+ * Get the last changed date. For all of the integer fields,
+ * we check for proper format. It is an error to have an
+ * incorrectly formatted number.
+ */
+
+ if (fields[2][0] == '\0') {
+ spwd.sp_lstchg = -1;
+ } else if ( (getlong (fields[2], &spwd.sp_lstchg) == 0)
+ || (spwd.sp_lstchg < 0)) {
+ return 0;
+ }
+
+ /*
+ * Get the minimum period between password changes.
+ */
+
+ if (fields[3][0] == '\0') {
+ spwd.sp_min = -1;
+ } else if ( (getlong (fields[3], &spwd.sp_min) == 0)
+ || (spwd.sp_min < 0)) {
+ return 0;
+ }
+
+ /*
+ * Get the maximum number of days a password is valid.
+ */
+
+ if (fields[4][0] == '\0') {
+ spwd.sp_max = -1;
+ } else if ( (getlong (fields[4], &spwd.sp_max) == 0)
+ || (spwd.sp_max < 0)) {
+ return 0;
+ }
+
+ /*
+ * If there are only OFIELDS fields (this is a SVR3.2 /etc/shadow
+ * formatted file), initialize the other field members to -1.
+ */
+
+ if (i == OFIELDS) {
+ spwd.sp_warn = -1;
+ spwd.sp_inact = -1;
+ spwd.sp_expire = -1;
+ spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
+
+ return &spwd;
+ }
+
+ /*
+ * Get the number of days of password expiry warning.
+ */
+
+ if (fields[5][0] == '\0') {
+ spwd.sp_warn = -1;
+ } else if ( (getlong (fields[5], &spwd.sp_warn) == 0)
+ || (spwd.sp_warn < 0)) {
+ return 0;
+ }
+
+ /*
+ * Get the number of days of inactivity before an account is
+ * disabled.
+ */
+
+ if (fields[6][0] == '\0') {
+ spwd.sp_inact = -1;
+ } else if ( (getlong (fields[6], &spwd.sp_inact) == 0)
+ || (spwd.sp_inact < 0)) {
+ return 0;
+ }
+
+ /*
+ * Get the number of days after the epoch before the account is
+ * set to expire.
+ */
+
+ if (fields[7][0] == '\0') {
+ spwd.sp_expire = -1;
+ } else if ( (getlong (fields[7], &spwd.sp_expire) == 0)
+ || (spwd.sp_expire < 0)) {
+ return 0;
+ }
+
+ /*
+ * This field is reserved for future use. But it isn't supposed
+ * to have anything other than a valid integer in it.
+ */
+
+ if (fields[8][0] == '\0') {
+ spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
+ } else if (getulong (fields[8], &spwd.sp_flag) == 0) {
+ return 0;
+ }
+
+ return (&spwd);
+}
+#else
+extern int errno; /* warning: ANSI C forbids an empty source file */
+#endif
+