Port over the last of the tinylogin applets

-Erik

libbb/pw_encrypt.c

@@ -0,0 +1,48 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routine.
+ *
+ * Copyright (C) 1999-2002 by Erik Andersen <andersee@debian.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <string.h>
+#include <crypt.h>
+#include "libbb.h"
+
+
+extern char *pw_encrypt(const char *clear, const char *salt)
+{
+	static char cipher[128];
+	char *cp;
+
+#ifdef CONFIG_FEATURE_SHA1_PASSWORDS
+	if (strncmp(salt, "$2$", 3) == 0) {
+		return sha1_crypt(clear);
+	}
+#endif
+	cp = (char *) crypt(clear, salt);
+	/* if crypt (a nonstandard crypt) returns a string too large,
+	   truncate it so we don't overrun buffers and hope there is
+	   enough security in what's left */
+	if (strlen(cp) > sizeof(cipher)-1) {
+		cp[sizeof(cipher)-1] = 0;
+	}
+	strcpy(cipher, cp);
+	return cipher;
+}
+