Add gc-arcfour and gc-arcfour-tests modules.

8 files changed, 207 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index e4cc19053c..5db0ee58d9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2005-10-19  Simon Josefsson  <jas@extundo.com>
 
+	* tests/test-gc-arcfour.c: New file.
+
+	* modules/gc-arcfour, modules/gc-arcfour-tests: New files.
+
+2005-10-19  Simon Josefsson  <jas@extundo.com>
+
 	* tests/test-gc-rijndael.c: New file.
 
 	* modules/gc-rijndael, modules/gc-rijndael-test: New files.
diff --git a/lib/ChangeLog b/lib/ChangeLog
index 5202477b53..5589f4873c 100644
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,5 +1,9 @@
 2005-10-19  Simon Josefsson  <jas@extundo.com>
 
+	* gc-gnulib.c: Support ARCFOUR.
+
+2005-10-19  Simon Josefsson  <jas@extundo.com>
+
 	* gc-gnulib.c: Implement gc_cipher_* API, currently only with AES
 	support.
 
diff --git a/lib/gc-gnulib.c b/lib/gc-gnulib.c
index 3e75529e03..61bf12435b 100644
--- a/lib/gc-gnulib.c
+++ b/lib/gc-gnulib.c
@@ -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_malloc,
 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_mode mode,
 
   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 handle, size_t keylen, const char *key)
 
   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_handle handle, size_t len, char *data)
 
   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_handle handle, size_t len, char *data)
 
   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:
diff --git a/m4/ChangeLog b/m4/ChangeLog
index 0337ab9fb5..704d9d79bb 100644
--- a/m4/ChangeLog
+++ b/m4/ChangeLog
@@ -1,5 +1,7 @@
 2005-10-19  Simon Josefsson  <jas@extundo.com>
 
+	* gc-arcfour.m4: New file.
+
 	* gc-rijndael.m4: New file.
 
 2005-10-19  Simon Josefsson  <jas@extundo.com>
diff --git a/m4/gc-arcfour.m4 b/m4/gc-arcfour.m4
new file mode 100644
index 0000000000..c5adf583af
--- /dev/null
+++ b/m4/gc-arcfour.m4
@@ -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
+])
diff --git a/modules/gc-arcfour b/modules/gc-arcfour
new file mode 100644
index 0000000000..99d9e1419b
--- /dev/null
+++ b/modules/gc-arcfour
@@ -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
diff --git a/modules/gc-arcfour-tests b/modules/gc-arcfour-tests
new file mode 100644
index 0000000000..e6249aad82
--- /dev/null
+++ b/modules/gc-arcfour-tests
@@ -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
diff --git a/tests/test-gc-arcfour.c b/tests/test-gc-arcfour.c
new file mode 100644
index 0000000000..9a92da40dc
--- /dev/null
+++ b/tests/test-gc-arcfour.c
@@ -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;
+}