[svn] Make the MD5 references even more generic.

Use OpenSSL's MD5 where available.
Published in <sxsg06x4f41.fsf@florida.arsdigita.de>.

ChangeLog

@@ -1,3 +1,7 @@
+2001-11-29  Hrvoje Niksic  <hniksic@arsdigita.com>
+
+	* configure.in: Use SSL's MD5 if we're compiling with SSL anyway.
+
 2001-11-27  Hrvoje Niksic  <hniksic@arsdigita.com>
 
 	* configure.in: Don't check for random.

configure.in

@@ -189,23 +189,6 @@ dnl
 dnl Checks for libraries.
 dnl
 
-dnl
-dnl Use the md5 lib if available (Solaris).
-dnl
-
-if test x$wget_need_md5 = xyes
-then
-  AC_DEFINE(HAVE_MD5)
-  AC_CHECK_LIB(md5, MD5Update, [
-    AC_DEFINE(HAVE_SOLARIS_MD5)
-    LIBS="-lmd5 $LIBS"
-    ], [
-    MD5_OBJ='gnu-md5$o'
-    AC_DEFINE(HAVE_BUILTIN_MD5)
-  ])
-fi
-AC_SUBST(MD5_OBJ)
-
 dnl On Solaris, -lnsl is needed to use gethostbyname.  On "NCR MP-RAS
 dnl 3.0", however, gethostbyname is in libc, but -lnsl is still needed
 dnl to use -lsocket, as well as for functions such as inet_ntoa.  We
@@ -353,6 +336,47 @@ main(){return 0;}
   CC=$wget_save_CC
 fi
 
+dnl
+dnl Find an md5 implementation.
+dnl
+
+dnl On Solaris, we use libmd5.  If we're compiled with OpenSSL, use
+dnl OpenSSL's md5 support.  Otherwise, use our own md5.
+
+if test x$wget_need_md5 = xyes
+then
+  MD5_OBJ='gen-md5$o'
+
+  found_md5=no
+
+  dnl First check for Solaris md5.
+  if test x$found_md5 = xno; then
+    AC_CHECK_LIB(md5, MD5Update, [
+      AC_DEFINE(HAVE_SOLARIS_MD5)
+      LIBS="-lmd5 $LIBS"
+      found_md5=yes
+    ])
+  fi
+
+  dnl Then see if we're linking OpenSSL anyway; if yes, use its md5
+  dnl implementation.
+  if test x$found_md5 = xno; then
+    if test x$ssl_linked = xyes; then
+      AC_DEFINE(HAVE_OPENSSL_MD5)
+      found_md5=yes
+    fi
+  fi
+
+  dnl If none of the above worked, use the builtin one.
+  if test x$found_md5 = xno; then
+    AC_DEFINE(HAVE_BUILTIN_MD5)
+    found_md5=yes
+    MD5_OBJ="$MD5_OBJ gnu-md5\$o"
+  fi
+fi
+AC_DEFINE(HAVE_MD5)
+AC_SUBST(MD5_OBJ)
+
 dnl
 dnl Set of available languages.
 dnl

src/config.h.in

@@ -219,6 +219,9 @@ char *alloca ();
 /* Define if we're using Solaris libmd5.  */
 #undef HAVE_SOLARIS_MD5
 
+/* Define if we're using OpenSSL md5.  */
+#undef HAVE_OPENSSL_MD5
+
 /* Define if we're using builtin (GNU) md5.c.  */
 #undef HAVE_BUILTIN_MD5
 

src/ftp-opie.c

@@ -28,6 +28,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #endif
 
 #include "wget.h"
+#include "gen-md5.h"
 
 /* Dictionary for integer-word translations.  */
 static char Wp[2048][4] = {
@@ -2151,16 +2152,16 @@ calculate_skey_response (int sequence, const char *seed, const char *pass)
   char key[8];
   static char buf[33];
 
-  MD5_CONTEXT_TYPE ctx;
+  ALLOCA_MD5_CONTEXT (ctx);
   unsigned long results[4];	/* #### this looks 32-bit-minded */
   char *feed = (char *) alloca (strlen (seed) + strlen (pass) + 1);
 
   strcpy (feed, seed);
   strcat (feed, pass);
 
-  MD5_INIT (&ctx);
-  MD5_UPDATE (feed, strlen (feed), &ctx);
-  MD5_FINISH (&ctx, results);
+  gen_md5_init (ctx);
+  gen_md5_update (feed, strlen (feed), ctx);
+  gen_md5_finish (ctx, (unsigned char *)results);
 
   results[0] ^= results[2];
   results[1] ^= results[3];
@@ -2168,9 +2169,9 @@ calculate_skey_response (int sequence, const char *seed, const char *pass)
 
   while (0 < sequence--)
     {
-      MD5_INIT (&ctx);
-      MD5_UPDATE (key, 8, &ctx);
-      MD5_FINISH (&ctx, results);
+      gen_md5_init (ctx);
+      gen_md5_update (key, 8, ctx);
+      gen_md5_finish (ctx, (unsigned char *)results);
       results[0] ^= results[2];
       results[1] ^= results[3];
       memcpy (key, (char *) results, 8);

src/gen-md5.c

@@ -0,0 +1,108 @@
+/* General MD5 support.
+   Copyright (C) 2001 Free Software Foundation, Inc.
+
+This file is part of GNU Wget.
+
+GNU Wget 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.
+
+GNU Wget 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 Wget; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include <config.h>
+#include "wget.h"
+
+#include "gen-md5.h"
+
+#ifdef HAVE_BUILTIN_MD5
+# include <gnu-md5.h>
+typedef struct md5_ctx gen_md5_context_imp;
+#endif
+
+#ifdef HAVE_SOLARIS_MD5
+# include <md5.h>
+typedef MD5_CTX gen_md5_context_imp;
+#endif
+
+#ifdef HAVE_OPENSSL_MD5
+# include <openssl/md5.h>
+typedef MD5_CTX gen_md5_context_imp;
+#endif
+
+struct gen_md5_context {
+  gen_md5_context_imp imp;
+};
+
+/* Originally I planned for these to be macros, but that's very hard
+   because some of these MD5 implementations use the same names for
+   their types.  For example, it is impossible to include <md5.h> and
+   <openssl/ssl.h> on Solaris, because the latter includes its own MD5
+   implementation, which clashes with <md5.h>.  */
+
+int
+gen_md5_context_size (void)
+{
+  return sizeof (struct gen_md5_context);
+}
+
+void
+gen_md5_init (gen_md5_context *ctx)
+{
+  gen_md5_context_imp *ctx_imp = &ctx->imp;
+
+#ifdef HAVE_BUILTIN_MD5
+  md5_init_ctx (ctx_imp);
+#endif
+
+#ifdef HAVE_SOLARIS_MD5
+  MD5Init (ctx_imp);
+#endif
+
+#ifdef HAVE_OPENSSL_MD5
+  MD5_Init (ctx_imp);
+#endif
+}
+
+void
+gen_md5_update (unsigned const char *buffer, int len, gen_md5_context *ctx)
+{
+  gen_md5_context_imp *ctx_imp = &ctx->imp;
+
+#ifdef HAVE_BUILTIN_MD5
+  md5_process_bytes (buffer, len, ctx_imp);
+#endif
+
+#ifdef HAVE_SOLARIS_MD5
+  MD5Update (ctx_imp, buffer, len);
+#endif
+
+#ifdef HAVE_OPENSSL_MD5
+  MD5_Update (ctx_imp, buffer, len);
+#endif
+}
+
+void
+gen_md5_finish (gen_md5_context *ctx, unsigned char *result)
+{
+  gen_md5_context_imp *ctx_imp = &ctx->imp;
+
+#ifdef HAVE_BUILTIN_MD5
+  md5_finish_ctx (ctx_imp, result);
+#endif
+
+#ifdef HAVE_SOLARIS_MD5
+  MD5Final (result, ctx_imp);
+#endif
+
+#ifdef HAVE_OPENSSL_MD5
+  MD5_Final (result, ctx_imp);
+#endif
+}

src/gen-md5.h

@@ -0,0 +1,32 @@
+/* General MD5 header file.
+   Copyright (C) 2001 Free Software Foundation, Inc.
+
+This file is part of GNU Wget.
+
+GNU Wget 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.
+
+GNU Wget 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 Wget; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+typedef struct gen_md5_context gen_md5_context;
+
+/* Use a forward declaration so we don't have to include any of the
+   includes.  */
+struct gen_md5_context;
+
+#define ALLOCA_MD5_CONTEXT(var_name) \
+  gen_md5_context *var_name = alloca (gen_md5_context_size ())
+
+int gen_md5_context_size PARAMS ((void));
+void gen_md5_init PARAMS ((gen_md5_context *));
+void gen_md5_update PARAMS ((const unsigned char *, int, gen_md5_context *));
+void gen_md5_finish PARAMS ((gen_md5_context *, unsigned char *));

src/http.c

@@ -64,6 +64,9 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 # include "gen_sslfunc.h"
 #endif /* HAVE_SSL */
 #include "cookies.h"
+#ifdef USE_DIGEST
+# include "gen-md5.h"
+#endif
 
 extern char *version_string;
 
@@ -2233,37 +2236,37 @@ digest_authentication_encode (const char *au, const char *user,
 
   /* Calculate the digest value.  */
   {
-    MD5_CONTEXT_TYPE ctx;
+    ALLOCA_MD5_CONTEXT (ctx);
     unsigned char hash[MD5_HASHLEN];
     unsigned char a1buf[MD5_HASHLEN * 2 + 1], a2buf[MD5_HASHLEN * 2 + 1];
     unsigned char response_digest[MD5_HASHLEN * 2 + 1];
 
     /* A1BUF = H(user ":" realm ":" password) */
-    MD5_INIT (&ctx);
-    MD5_UPDATE (user, strlen (user), &ctx);
-    MD5_UPDATE (":", 1, &ctx);
-    MD5_UPDATE (realm, strlen (realm), &ctx);
-    MD5_UPDATE (":", 1, &ctx);
-    MD5_UPDATE (passwd, strlen (passwd), &ctx);
-    MD5_FINISH (&ctx, hash);
+    gen_md5_init (ctx);
+    gen_md5_update (user, strlen (user), ctx);
+    gen_md5_update (":", 1, ctx);
+    gen_md5_update (realm, strlen (realm), ctx);
+    gen_md5_update (":", 1, ctx);
+    gen_md5_update (passwd, strlen (passwd), ctx);
+    gen_md5_finish (ctx, hash);
     dump_hash (a1buf, hash);
 
     /* A2BUF = H(method ":" path) */
-    MD5_INIT (&ctx);
-    MD5_UPDATE (method, strlen (method), &ctx);
-    MD5_UPDATE (":", 1, &ctx);
-    MD5_UPDATE (path, strlen (path), &ctx);
-    MD5_FINISH (&ctx, hash);
+    gen_md5_init (ctx);
+    gen_md5_update (method, strlen (method), ctx);
+    gen_md5_update (":", 1, ctx);
+    gen_md5_update (path, strlen (path), ctx);
+    gen_md5_finish (ctx, hash);
     dump_hash (a2buf, hash);
 
     /* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
-    MD5_INIT (&ctx);
-    MD5_UPDATE (a1buf, MD5_HASHLEN * 2, &ctx);
-    MD5_UPDATE (":", 1, &ctx);
-    MD5_UPDATE (nonce, strlen (nonce), &ctx);
-    MD5_UPDATE (":", 1, &ctx);
-    MD5_UPDATE (a2buf, MD5_HASHLEN * 2, &ctx);
-    MD5_FINISH (&ctx, hash);
+    gen_md5_init (ctx);
+    gen_md5_update (a1buf, MD5_HASHLEN * 2, ctx);
+    gen_md5_update (":", 1, ctx);
+    gen_md5_update (nonce, strlen (nonce), ctx);
+    gen_md5_update (":", 1, ctx);
+    gen_md5_update (a2buf, MD5_HASHLEN * 2, ctx);
+    gen_md5_finish (ctx, hash);
     dump_hash (response_digest, hash);
 
     res = (char*) xmalloc (strlen (user)

src/sysdep.h

@@ -198,25 +198,4 @@ void *memcpy ();
 # define MAP_FAILED ((void *) -1)
 #endif
 
-/* Define wrapper macros for different MD5 routines. */
-#ifdef HAVE_MD5
-
-#ifdef HAVE_BUILTIN_MD5
-# include <gnu-md5.h>
-# define MD5_CONTEXT_TYPE struct md5_ctx
-# define MD5_INIT(ctx) md5_init_ctx (ctx)
-# define MD5_UPDATE(buffer, len, ctx) md5_process_bytes (buffer, len, ctx)
-# define MD5_FINISH(ctx, result) md5_finish_ctx (ctx, result)
-#endif
-
-#ifdef HAVE_SOLARIS_MD5
-# include <md5.h>
-# define MD5_CONTEXT_TYPE MD5_CTX
-# define MD5_INIT(ctx) MD5Init (ctx)
-# define MD5_UPDATE(buffer, len, ctx) MD5Update (ctx, (unsigned char *)(buffer), len)
-# define MD5_FINISH(ctx, result) MD5Final ((unsigned char *)(result), ctx)
-#endif
-
-#endif /* HAVE_MD5 */
-
 #endif /* SYSDEP_H */

src/utils.c

@@ -1772,9 +1772,11 @@ determine_screen_width (void)
 #endif /* TIOCGWINSZ */
 }
 
-#if 0
+#if 1
 /* A debugging function for checking whether an MD5 library works. */
 
+#include "gen-md5.h"
+
 char *
 debug_test_md5 (char *buf)
 {
@@ -1783,11 +1785,11 @@ debug_test_md5 (char *buf)
   unsigned char *p1;
   char *p2;
   int cnt;
-  MD5_CONTEXT_TYPE ctx;
+  ALLOCA_MD5_CONTEXT (ctx);
 
-  MD5_INIT (&ctx);
-  MD5_UPDATE (buf, strlen (buf), &ctx);
-  MD5_FINISH (&ctx, raw);
+  gen_md5_init (ctx);
+  gen_md5_update (buf, strlen (buf), ctx);
+  gen_md5_finish (ctx, raw);
 
   p1 = raw;
   p2 = res;