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gc-arcfour and gc-arcfour-tests


From: Simon Josefsson
Subject: gc-arcfour and gc-arcfour-tests
Date: Wed, 19 Oct 2005 17:04:26 +0200
User-agent: Gnus/5.110004 (No Gnus v0.4) Emacs/22.0.50 (gnu/linux)

I have installed this too.

Index: ChangeLog
===================================================================
RCS file: /cvsroot/gnulib/gnulib/ChangeLog,v
retrieving revision 1.431
diff -u -p -r1.431 ChangeLog
--- ChangeLog   19 Oct 2005 14:54:32 -0000      1.431
+++ ChangeLog   19 Oct 2005 15:04:08 -0000
@@ -1,5 +1,11 @@
 2005-10-19  Simon Josefsson  <address@hidden>
 
+       * tests/test-gc-arcfour.c: New file.
+
+       * modules/gc-arcfour, modules/gc-arcfour-tests: New files.
+
+2005-10-19  Simon Josefsson  <address@hidden>
+
        * tests/test-gc-rijndael.c: New file.
 
        * modules/gc-rijndael, modules/gc-rijndael-test: New files.
Index: lib/ChangeLog
===================================================================
RCS file: /cvsroot/gnulib/gnulib/lib/ChangeLog,v
retrieving revision 1.1023
diff -u -p -r1.1023 ChangeLog
--- lib/ChangeLog       19 Oct 2005 14:54:32 -0000      1.1023
+++ lib/ChangeLog       19 Oct 2005 15:04:09 -0000
@@ -1,5 +1,9 @@
 2005-10-19  Simon Josefsson  <address@hidden>
 
+       * gc-gnulib.c: Support ARCFOUR.
+
+2005-10-19  Simon Josefsson  <address@hidden>
+
        * gc-gnulib.c: Implement gc_cipher_* API, currently only with AES
        support.
 
Index: lib/gc-gnulib.c
===================================================================
RCS file: /cvsroot/gnulib/gnulib/lib/gc-gnulib.c,v
retrieving revision 1.9
diff -u -p -r1.9 gc-gnulib.c
--- lib/gc-gnulib.c     19 Oct 2005 14:54:32 -0000      1.9
+++ lib/gc-gnulib.c     19 Oct 2005 15:04:09 -0000
@@ -37,6 +37,7 @@
 #include <fcntl.h>
 #include <errno.h>
 
+/* Hashes. */
 #ifdef GC_USE_MD4
 # include "md4.h"
 #endif
@@ -49,6 +50,11 @@
 #ifdef GC_USE_HMAC_MD5
 # include "hmac.h"
 #endif
+
+/* Ciphers. */
+#ifdef GC_USE_ARCFOUR
+# include "arcfour.h"
+#endif
 #ifdef GC_USE_RIJNDAEL
 # include "rijndael-api-fst.h"
 #endif
@@ -152,6 +158,9 @@ gc_set_allocators (gc_malloc_t func_mall
 typedef struct _gc_cipher_ctx {
   Gc_cipher alg;
   Gc_cipher_mode mode;
+#ifdef GC_USE_ARCFOUR
+  arcfour_context arcfourContext;
+#endif
 #ifdef GC_USE_RIJNDAEL
   rijndaelKeyInstance aesEncKey;
   rijndaelKeyInstance aesDecKey;
@@ -173,6 +182,20 @@ gc_cipher_open (Gc_cipher alg, Gc_cipher
 
   switch (alg)
     {
+#ifdef GC_USE_ARCFOUR
+    case GC_ARCFOUR128:
+    case GC_ARCFOUR40:
+      switch (mode)
+       {
+       case GC_STREAM:
+         break;
+
+       default:
+         rc = GC_INVALID_CIPHER;
+       }
+      break;
+#endif
+
 #ifdef GC_USE_RIJNDAEL
     case GC_AES128:
     case GC_AES192:
@@ -208,6 +231,13 @@ gc_cipher_setkey (gc_cipher_handle handl
 
   switch (ctx->alg)
     {
+#ifdef GC_USE_ARCFOUR
+    case GC_ARCFOUR128:
+    case GC_ARCFOUR40:
+      arcfour_setkey (&ctx->arcfourContext, key, keylen);
+      break;
+#endif
+
 #ifdef GC_USE_RIJNDAEL
     case GC_AES128:
     case GC_AES192:
@@ -297,6 +327,13 @@ gc_cipher_encrypt_inline (gc_cipher_hand
 
   switch (ctx->alg)
     {
+#ifdef GC_USE_ARCFOUR
+    case GC_ARCFOUR128:
+    case GC_ARCFOUR40:
+      arcfour_stream (&ctx->arcfourContext, data, data, len);
+      break;
+#endif
+
 #ifdef GC_USE_RIJNDAEL
     case GC_AES128:
     case GC_AES192:
@@ -326,6 +363,13 @@ gc_cipher_decrypt_inline (gc_cipher_hand
 
   switch (ctx->alg)
     {
+#ifdef GC_USE_ARCFOUR
+    case GC_ARCFOUR128:
+    case GC_ARCFOUR40:
+      arcfour_stream (&ctx->arcfourContext, data, data, len);
+      break;
+#endif
+
 #ifdef GC_USE_RIJNDAEL
     case GC_AES128:
     case GC_AES192:
Index: m4/ChangeLog
===================================================================
RCS file: /cvsroot/gnulib/gnulib/m4/ChangeLog,v
retrieving revision 1.749
diff -u -p -r1.749 ChangeLog
--- m4/ChangeLog        19 Oct 2005 14:54:32 -0000      1.749
+++ m4/ChangeLog        19 Oct 2005 15:04:09 -0000
@@ -1,5 +1,7 @@
 2005-10-19  Simon Josefsson  <address@hidden>
 
+       * gc-arcfour.m4: New file.
+
        * gc-rijndael.m4: New file.
 
 2005-10-19  Simon Josefsson  <address@hidden>
Index: m4/gc-arcfour.m4
===================================================================
RCS file: m4/gc-arcfour.m4
diff -N m4/gc-arcfour.m4
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ m4/gc-arcfour.m4    19 Oct 2005 15:04:09 -0000
@@ -0,0 +1,15 @@
+# gc-arcfour.m4 serial 1
+dnl Copyright (C) 2005 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_GC_ARCFOUR],
+[
+  AC_REQUIRE([gl_GC])
+  AC_DEFINE(GC_USE_ARCFOUR, 1,
+    [Define if you want to support ARCFOUR through GC.])
+  if test "$ac_cv_libgcrypt" != yes; then
+    gl_ARCFOUR
+  fi
+])
Index: modules/gc-arcfour
===================================================================
RCS file: modules/gc-arcfour
diff -N modules/gc-arcfour
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ modules/gc-arcfour  19 Oct 2005 15:04:09 -0000
@@ -0,0 +1,26 @@
+Description:
+Generic crypto wrappers for ARCFOUR stream cipher.
+
+Files:
+m4/gc-arcfour.m4
+lib/arcfour.h
+lib/arcfour.c
+m4/arcfour.m4
+
+Depends-on:
+stdint
+gc
+
+configure.ac:
+gl_GC_ARCFOUR
+
+Makefile.am:
+
+Include:
+"gc.h"
+
+License:
+LGPL
+
+Maintainer:
+Simon Josefsson
Index: modules/gc-arcfour-tests
===================================================================
RCS file: modules/gc-arcfour-tests
diff -N modules/gc-arcfour-tests
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ modules/gc-arcfour-tests    19 Oct 2005 15:04:09 -0000
@@ -0,0 +1,11 @@
+Files:
+tests/test-gc-arcfour.c
+
+Depends-on:
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-gc-arcfour
+noinst_PROGRAMS += test-gc-arcfour
+test_gc_arcfour_SOURCES = test-gc-arcfour.c
Index: tests/test-gc-arcfour.c
===================================================================
RCS file: tests/test-gc-arcfour.c
diff -N tests/test-gc-arcfour.c
--- /dev/null   1 Jan 1970 00:00:00 -0000
+++ tests/test-gc-arcfour.c     19 Oct 2005 15:04:09 -0000
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2005 Free Software Foundation
+ * Written by Simon Josefsson
+ *
+ * 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, 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include "gc.h"
+
+int
+main (int argc, char *argv[])
+{
+  gc_cipher_handle ctx;
+  /* Test vector from Cryptlib via Libgcrypt labeled there: "from the
+     State/Commerce Department". */
+  static char key_1[] = { 0x61, 0x8A, 0x63, 0xD2, 0xFB };
+  static char plaintext_1[] = { 0xDC, 0xEE, 0x4C, 0xF9, 0x2C };
+  static const char ciphertext_1[] = { 0xF1, 0x38, 0x29, 0xC9, 0xDE };
+  char scratch[16];
+  Gc_rc rc;
+
+  rc = gc_init ();
+  if (rc != GC_OK)
+    {
+      printf ("gc_init() failed\n");
+      return 1;
+    }
+
+  rc = gc_cipher_open (GC_ARCFOUR40, GC_STREAM, &ctx);
+  if (rc != GC_OK)
+    return 1;
+
+  rc = gc_cipher_setkey (ctx, sizeof (key_1), key_1);
+  if (rc != GC_OK)
+    return 1;
+
+  memcpy (scratch, plaintext_1, sizeof (plaintext_1));
+  rc = gc_cipher_encrypt_inline (ctx, sizeof (plaintext_1), scratch);
+  if (rc != GC_OK)
+    return 1;
+
+  if (memcmp (scratch, ciphertext_1, sizeof (ciphertext_1)))
+    {
+      size_t i;
+      printf ("expected:\n");
+      for (i = 0; i < 5; i++)
+       printf ("%02x ", scratch[i] & 0xFF);
+      printf ("\ncomputed:\n");
+      for (i = 0; i < 5; i++)
+       printf ("%02x ", ciphertext_1[i] & 0xFF);
+      printf ("\n");
+      return 1;
+    }
+
+  /* decrypt */
+
+  rc = gc_cipher_setkey (ctx, sizeof (key_1), key_1);
+  if (rc != GC_OK)
+    return 1;
+
+  rc = gc_cipher_decrypt_inline (ctx, sizeof (plaintext_1), scratch);
+  if (rc != GC_OK)
+    return 1;
+
+  if (memcmp (scratch, plaintext_1, sizeof (plaintext_1)))
+    {
+      size_t i;
+      printf ("expected:\n");
+      for (i = 0; i < 5; i++)
+       printf ("%02x ", plaintext_1[i] & 0xFF);
+      printf ("\ncomputed:\n");
+      for (i = 0; i < 5; i++)
+       printf ("%02x ", scratch[i] & 0xFF);
+      printf ("\n");
+      return 1;
+    }
+
+  gc_done ();
+
+  return 0;
+}




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