1 files changed, 108 insertions, 0 deletions

diff --git a/src/lib/libc/crypt/crypt2.c b/src/lib/libc/crypt/crypt2.c
new file mode 100644
index 0000000000..0c93c12044
--- /dev/null
+++ b/src/lib/libc/crypt/crypt2.c
@@ -0,0 +1,108 @@
+/*      $OpenBSD: crypt2.c,v 1.1 2003/08/12 01:22:17 deraadt Exp $      */
+
+/*
+ * FreeSec: libcrypt
+ *
+ * Copyright (c) 1994 David Burren
+ * 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.
+ * 4. Neither the name of the author nor the names of other contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ *
+ * This is an original implementation of the DES and the crypt(3) interfaces
+ * by David Burren <davidb@werj.com.au>.
+ *
+ * An excellent reference on the underlying algorithm (and related
+ * algorithms) is:
+ *
+ *      B. Schneier, Applied Cryptography: protocols, algorithms,
+ *      and source code in C, John Wiley & Sons, 1994.
+ *
+ * Note that in that book's description of DES the lookups for the initial,
+ * pbox, and final permutations are inverted (this has been brought to the
+ * attention of the author).  A list of errata for this book has been
+ * posted to the sci.crypt newsgroup by the author and is available for FTP.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char rcsid[] = "$OpenBSD: crypt2.c,v 1.1 2003/08/12 01:22:17 deraadt Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <pwd.h>
+#include <unistd.h>
+#include <string.h>
+
+#ifdef DEBUG
+# include <stdio.h>
+#endif
+
+extern const u_char _des_bits8[8];
+extern const u_int32_t _des_bits32[32];
+extern int      _des_initialised;
+
+int
+setkey(const char *key)
+{
+        int     i, j;
+        u_int32_t packed_keys[2];
+        u_char  *p;
+
+        p = (u_char *) packed_keys;
+
+        for (i = 0; i < 8; i++) {
+                p[i] = 0;
+                for (j = 0; j < 8; j++)
+                        if (*key++ & 1)
+                                p[i] |= _des_bits8[j];
+        }
+        return(des_setkey(p));
+}
+
+int
+encrypt(char *block, int flag)
+{
+        u_int32_t io[2];
+        u_char  *p;
+        int     i, j, retval;
+
+        if (!_des_initialised)
+                _des_init();
+
+        _des_setup_salt(0);
+        p = (u_char *)block;
+        for (i = 0; i < 2; i++) {
+                io[i] = 0L;
+                for (j = 0; j < 32; j++)
+                        if (*p++ & 1)
+                                io[i] |= _des_bits32[j];
+        }
+        retval = _des_do_des(io[0], io[1], io, io + 1, flag ? -1 : 1);
+        for (i = 0; i < 2; i++)
+                for (j = 0; j < 32; j++)
+                        block[(i << 5) | j] = (io[i] & _des_bits32[j]) ? 1 : 0;
+        return(retval);
+}