Introduce Danny Braniss' iSCSI initiator, version 2.0.99. Please read the

included man pages on how to use it.  This code is still somewhat experimental
but has been successfully tested on a number of targets.  Many thanks to
Danny for contributing this.

Approved by: re

1 files changed, 208 insertions, 0 deletions

diff --git a/sbin/iscontrol/auth_subr.c b/sbin/iscontrol/auth_subr.c
new file mode 100644
index 000000000000..8381687fca51
--- /dev/null
+++ b/sbin/iscontrol/auth_subr.c
@@ -0,0 +1,208 @@
+/*-
+ * Copyright (c) 2005-2007 Daniel Braniss <danny@cs.huji.ac.il>
+ * 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.
+ *
+ * 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.
+ *
+ */
+
+/*
+ | $Id: auth_subr.c,v 2.2 2007/06/01 08:09:37 danny Exp $
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <arpa/inet.h>
+#if __FreeBSD_version < 500000
+#include <sys/time.h>
+#endif
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+
+#include <md5.h>
+#include <sha.h>
+
+#include "iscsi.h"
+#include "iscontrol.h"
+#include "pdu.h"
+
+static int
+chapMD5(char id, char *cp, char *chapSecret, unsigned char *digest)
+{
+     MD5_CTX	ctx;
+     char	*tmp;
+     int	len;
+
+     debug_called(3);
+
+     MD5Init(&ctx);
+
+     MD5Update(&ctx, &id, 1);
+
+     if((len = str2bin(chapSecret, &tmp)) == 0) {
+	  // print error
+	  return -1;
+     }
+     MD5Update(&ctx, tmp, len);
+     free(tmp);
+
+     if((len = str2bin(cp, &tmp)) == 0) {
+	  // print error
+	  return -1;
+     }
+     MD5Update(&ctx, tmp, len);
+     free(tmp);
+
+     MD5Final(digest, &ctx);
+     
+
+     return 0;
+}
+
+static int
+chapSHA1(char id, char *cp, char *chapSecret, unsigned char *digest)
+{
+     SHA1_CTX	ctx;
+     char	*tmp;
+     int	len;
+
+     debug_called(3);
+
+     SHA1_Init(&ctx);
+     
+     SHA1_Update(&ctx, &id, 1);
+
+     if((len = str2bin(chapSecret, &tmp)) == 0) {
+	  // print error
+	  return -1;
+     }
+     SHA1_Update(&ctx, tmp, len);
+     free(tmp);
+
+     if((len = str2bin(cp, &tmp)) == 0) {
+	  // print error
+	  return -1;
+     }
+     SHA1_Update(&ctx, tmp, len);
+     free(tmp);
+
+     SHA1_Final(digest, &ctx);
+
+     return 0;
+    
+}
+/*
+ | the input text format can be anything that the rfc3270 defines
+ | (see section 5.1 and str2bin)
+ | digest length for md5 is 128bits, and for sha1 is 160bits.
+ | digest is an ASCII string which represents the bits in 
+ | hexadecimal or base64 according to the challenge(cp) format
+ */
+char *
+chapDigest(char *ap, char id, char *cp, char *chapSecret)
+{
+     int	len;
+     unsigned	char digest[20];
+     char	encoding[3];
+
+     debug_called(3);
+
+     len = 0;
+     if(strcmp(ap, "5") == 0 && chapMD5(id, cp, chapSecret, digest) == 0)
+	  len = 16;
+     else
+     if(strcmp(ap, "7") == 0 && chapSHA1(id, cp, chapSecret, digest) == 0)
+	  len = 20;
+
+     if(len) {
+	  sprintf(encoding, "%.2s", cp);
+	  return bin2str(encoding, digest, len);
+     }
+
+     return NULL;
+}
+
+char *
+genChapChallenge(char *encoding, int len)
+{
+     int	fd;
+     unsigned	char tmp[1024];
+
+     if(len > sizeof(tmp))
+	  return NULL;
+
+     if((fd = open("/dev/random", O_RDONLY)) != -1) {
+	  read(fd, tmp, len);
+	  close(fd);
+	  return bin2str(encoding, tmp, len);
+     }
+     perror("/dev/random");
+     // make up something ...
+     return NULL;
+}
+
+#ifdef TEST_AUTH
+static void
+puke(char *str, unsigned char *dg, int len)
+{
+     printf("%3d] %s\n     0x", len, str);
+     while(len-- > 0)
+	  printf("%02x", *dg++);
+     printf("\n");
+}
+
+main(int cc, char **vv)
+{
+     char *p, *ap, *ip, *cp, *chapSecret, *digest;
+     int len;
+
+#if 0
+     ap = "5";
+     chapSecret = "0xa5aff013dd839b1edd31ee73a1df0b1b";
+//     chapSecret = "abcdefghijklmnop";
+     len = str2bin(chapSecret, &cp);
+     puke(chapSecret, cp, len);
+
+     ip = "238";
+     cp = "0xbd456029";
+
+     
+     if((digest = chapDigest(ap, ip, cp, chapSecret)) != NULL) {
+	  len = str2bin(digest, &cp);
+	  puke(digest, cp, len);
+     }
+#else
+     printf("%d] %s\n", 24, genChallenge("0X", 24));
+#endif
+}
+#endif