Opkg support for smime (pkcs7) packages list signing

Thanks to Camille Moncelier <moncelier@devlife.org>
http://groups.google.com/group/opkg-devel/browse_thread/thread/6071ce290d5ceb77?utoken=qjR-TC0AAADKDldt5ZXsDDLs9sWCpWZI1zgeariQUwksg5ob1tmaFTCAL7MTcQRO6S85GfHgQ_k

As promised :) here is a patch allowing opkg to authenticate
a package list using smime and openssl instead of gpgme

Example:

 Sign a package list:
openssl smime -sign -in /path/to/repo/Packages \
       -signer /root/server.pem -binary \
       -outform PEM -out /path/to/repo/Packages.sig

 Configuration in /etc/opkg/opkg.conf
option check_signature 1
option signature_ca_file /etc/serverCA.pem
 option signature_ca_path /path/to/certs/dir

 opkg update
Downloading http://repo:8000/Packages
Updated list of available packages in /usr/lib/opkg/lists/angstrom
Downloading http://repo:8000/Packages.sig
Signature check passed

 Package list corruption or MIM:
Downloading http://repo:8000/Packages
Updated list of available packages in /usr/lib/opkg/lists/angstrom
Downloading http://repo:8000/Packages.sig
Signature check failed
Collected errors:
 * Verification failure

Camille Moncelier
http://devlife.org/

git-svn-id: http://opkg.googlecode.com/svn/trunk@221 e8e0d7a0-c8d9-11dd-a880-a1081c7ac358

1 files changed, 3 insertions, 1 deletions

diff --git a/libopkg/opkg_install.c b/libopkg/opkg_install.c
index 750ea65..1bcaf25 100644
--- a/libopkg/opkg_install.c
+++ b/libopkg/opkg_install.c
@@ -837,7 +837,7 @@ int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
      }
 
      /* check that the repository is valid */
-     #if HAVE_GPGME
+     #if defined(HAVE_GPGME) || defined(HAVE_OPENSSL)
      char *list_file_name, *sig_file_name, *lists_dir;
 
      /* check to ensure the package has come from a repository */
@@ -854,6 +854,8 @@ int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
        {
          if (opkg_verify_file (conf, list_file_name, sig_file_name))
            return OPKG_INSTALL_ERR_SIGNATURE;
+       }else{
+         return OPKG_INSTALL_ERR_SIGNATURE;
        }
 
        free (lists_dir);