opkg: Make opkg understand old md5

Opkg now uses sha256 by default and expects them. Making it optionally
understand md5s also and detect md5 sum so we can migrate from configuration
that used md5.

Signed-off-by: Michal Hrusecky <Michal.Hrusecky@nic.cz>

SVN-Revision: 48867

2 files changed, 69 insertions, 21 deletions

diff --git a/package/system/opkg/Makefile b/package/system/opkg/Makefile
index e46c6b3..c09d168 100644
--- a/package/system/opkg/Makefile
+++ b/package/system/opkg/Makefile
@@ -12,7 +12,7 @@ include $(INCLUDE_DIR)/feeds.mk
 PKG_NAME:=opkg
 PKG_REV:=9c97d5ecd795709c8584e972bfdf3aee3a5b846d
 PKG_VERSION:=$(PKG_REV)
-PKG_RELEASE:=10
+PKG_RELEASE:=11
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_VERSION:=$(PKG_REV)
@@ -43,6 +43,7 @@ define Package/opkg/Default
   TITLE:=opkg package manager
   DEPENDS:=+uclient-fetch
   URL:=http://wiki.openmoko.org/wiki/Opkg
+  MENU:=1
 endef
 
 define Package/opkg/Default/description
@@ -55,6 +56,16 @@ define Package/opkg/Default/description
   opkg knows how to install both .ipk and .deb packages.
 endef
 
+define Package/opkg/config
+config OPKG_SUPPORT_MD5
+  bool
+  default n
+  depends on PACKAGE_opkg
+  prompt "Support reading old md5 hashes."
+  help
+	Old opkg used md5s, new uses sha. This options enables understanding both while prefering sha.
+endef
+
 define Package/opkg
   $(call Package/opkg/Default)
   VARIANT:=unsigned
@@ -84,6 +95,16 @@ define Package/opkg-smime/description
   This package allows the Package index to be verified with S/MIME.
 endef
 
+define Package/opkg-smime/config
+config OPKG_SMIME_SUPPORT_MD5
+  bool
+  default n
+  depends on PACKAGE_opkg-smime
+  prompt "Support reading old md5 hashes."
+  help
+	Old opkg used md5s, new uses sha. This options enables understanding both while prefering sha.
+endef
+
 Package/opkg-smime/conffiles = $(Package/opkg/conffiles)
 
 TARGET_CFLAGS += -ffunction-sections -fdata-sections
@@ -97,11 +118,21 @@ CONFIGURE_ARGS += \
 	--with-opkglockfile=/var/lock/opkg.lock
 
 ifeq ($(BUILD_VARIANT),smime)
-	CONFIGURE_ARGS += --enable-openssl --disable-usign
+  CONFIGURE_ARGS += --enable-openssl --disable-usign
+  ifeq ($(CONFIG_OPKG_SMIME_SUPPORT_MD5),y)
+    CONFIGURE_ARGS += --enable-md5
+  else
+    CONFIGURE_ARGS += --disable-md5
+  endif
 else
   ifndef CONFIG_SIGNED_PACKAGES
     CONFIGURE_ARGS += --disable-usign
   endif
+  ifeq ($(CONFIG_OPKG_SUPPORT_MD5),y)
+    CONFIGURE_ARGS += --enable-md5
+  else
+    CONFIGURE_ARGS += --disable-md5
+  endif
 endif
 
 MAKE_FLAGS = \
diff --git a/package/system/opkg/patches/230-drop_md5_support.patch b/package/system/opkg/patches/230-drop_md5_support.patch
index 63671e5..3b28104 100644
--- a/package/system/opkg/patches/230-drop_md5_support.patch
+++ b/package/system/opkg/patches/230-drop_md5_support.patch
@@ -1,6 +1,6 @@
 --- a/libopkg/conffile.c
 +++ b/libopkg/conffile.c
-@@ -36,7 +36,7 @@
+@@ -36,7 +36,7 @@ void conffile_deinit(conffile_t *conffil
  
  int conffile_has_been_modified(conffile_t *conffile)
  {
@@ -9,7 +9,7 @@
      char *filename = conffile->name;
      char *root_filename;
      int ret = 1;
-@@ -48,16 +48,19 @@
+@@ -48,16 +48,23 @@ int conffile_has_been_modified(conffile_
  
      root_filename = root_filename_alloc(filename);
  
@@ -19,7 +19,11 @@
 -        opkg_msg(INFO, "Conffile %s:\n\told md5=%s\n\tnew md5=%s\n",
 -		conffile->name, md5sum, conffile->value);
 +#ifdef HAVE_MD5
-+    chksum = file_md5sum_alloc(root_filename);
++    if(conffile->value && strlen(conffile->value) > 33) {
++        chksum = file_sha256sum_alloc(root_filename);
++    } else {
++        chksum = file_md5sum_alloc(root_filename);
++    }
 +#else
 +    chksum = file_sha256sum_alloc(root_filename);
 +#endif
@@ -48,7 +52,7 @@
  #include "libbb/libbb.h"
  
  #if defined HAVE_SHA256
-@@ -135,6 +137,7 @@
+@@ -135,6 +137,7 @@ file_mkdir_hier(const char *path, long m
  	return make_directory(path, mode, FILEUTILS_RECUR);
  }
  
@@ -56,7 +60,7 @@
  char *file_md5sum_alloc(const char *file_name)
  {
      static const int md5sum_bin_len = 16;
-@@ -180,6 +183,7 @@
+@@ -180,6 +183,7 @@ char *file_md5sum_alloc(const char *file
  
      return md5sum_hex;
  }
@@ -66,7 +70,7 @@
  char *file_sha256sum_alloc(const char *file_name)
 --- a/libopkg/opkg_install.c
 +++ b/libopkg/opkg_install.c
-@@ -1082,7 +1082,7 @@
+@@ -1082,7 +1082,7 @@ resolve_conffiles(pkg_t *pkg)
       conffile_list_elt_t *iter;
       conffile_t *cf;
       char *cf_backup;
@@ -75,26 +79,27 @@
  
       if (conf->noaction) return 0;
  
-@@ -1093,7 +1093,11 @@
+@@ -1093,7 +1093,7 @@ resolve_conffiles(pkg_t *pkg)
  
  	  /* Might need to initialize the md5sum for each conffile */
  	  if (cf->value == NULL) {
-+#ifdef HAVE_MD5
- 	       cf->value = file_md5sum_alloc(root_filename);
-+#else
+-	       cf->value = file_md5sum_alloc(root_filename);
 +	       cf->value = file_sha256sum_alloc(root_filename);
-+#endif
  	  }
  
  	  if (!file_exists(root_filename)) {
-@@ -1105,8 +1109,12 @@
+@@ -1105,8 +1105,16 @@ resolve_conffiles(pkg_t *pkg)
  
            if (file_exists(cf_backup)) {
                /* Let's compute md5 to test if files are changed */
 -              md5sum = file_md5sum_alloc(cf_backup);
 -              if (md5sum && cf->value && strcmp(cf->value,md5sum) != 0 ) {
 +#ifdef HAVE_MD5
-+              chksum = file_md5sum_alloc(cf_backup);
++              if(cf->value && strlen(cf->value) > 33) {
++                  chksum = file_sha256sum_alloc(cf_backup);
++              } else {
++                  chksum = file_md5sum_alloc(cf_backup);
++              }
 +#else
 +              chksum = file_sha256sum_alloc(cf_backup);
 +#endif
@@ -102,7 +107,7 @@
                    if (conf->force_maintainer) {
                        opkg_msg(NOTICE, "Conffile %s using maintainer's setting.\n",
  				      cf_backup);
-@@ -1123,8 +1131,8 @@
+@@ -1123,8 +1131,8 @@ resolve_conffiles(pkg_t *pkg)
  		  }
                }
                unlink(cf_backup);
@@ -113,7 +118,7 @@
            }
  
  	  free(cf_backup);
-@@ -1323,6 +1331,7 @@
+@@ -1323,6 +1331,7 @@ opkg_install_pkg(pkg_t *pkg, int from_up
       }
       #endif
  
@@ -121,7 +126,7 @@
       /* Check for md5 values */
       if (pkg->md5sum)
       {
-@@ -1346,6 +1355,7 @@
+@@ -1346,6 +1355,7 @@ opkg_install_pkg(pkg_t *pkg, int from_up
  	 if (file_md5)
                free(file_md5);
       }
@@ -131,7 +136,7 @@
       /* Check for sha256 value */
 --- a/libopkg/Makefile.am
 +++ b/libopkg/Makefile.am
-@@ -25,13 +25,16 @@
+@@ -25,13 +25,16 @@ opkg_list_sources = conffile.c conffile.
  		    pkg_src.c pkg_src.h pkg_src_list.c pkg_src_list.h \
  		    str_list.c str_list.h void_list.c void_list.h \
  		    active_list.c active_list.h list.h 
@@ -151,11 +156,23 @@
  endif
 --- a/configure.ac
 +++ b/configure.ac
-@@ -72,6 +72,7 @@
+@@ -68,10 +68,19 @@ AC_ARG_ENABLE(sha256,
+       (sha256.{c,h} are GPLv3 licensed) [[default=no]] ]),
+     [want_sha256="$enableval"], [want_sha256="no"])
+ 
++AC_ARG_ENABLE(md5,
++              AC_HELP_STRING([--enable-md5], [Enable md5sum check
++      (md5.{c,h} are GPLv3 licensed) [[default=no]] ]),
++    [want_md5="$enableval"], [want_md5="yes"])
++
+ if test "x$want_sha256" = "xyes"; then
    AC_DEFINE(HAVE_SHA256, 1, [Define if you want sha256 support])
  fi
++if test "x$want_md5" = "xyes"; then
++  AC_DEFINE(HAVE_MD5, 1, [Define if you want md5 support])
++fi
  AM_CONDITIONAL(HAVE_SHA256, test "x$want_sha256" = "xyes")
-+AM_CONDITIONAL(HAVE_MD5, test "x$want_sha256" = "xno")
++AM_CONDITIONAL(HAVE_MD5, test "x$want_md5" = "xyes")
  
  # check for openssl
  AC_ARG_ENABLE(openssl,