From b531f2fd75be3f616073cba714d73324525fd3e4 Mon Sep 17 00:00:00 2001 From: NIIBE Yutaka Date: Sat, 9 Jul 2016 10:20:02 +0900 Subject: gpgv: Tweak default options for extra security. * g10/gpgv.c (main): Set opt.no_sig _cache, so that it doesn't depend on cached status. Similarly, set opt.flags.require_cross_cert for backsig validation for subkey signature. -- (backport of master commit e32c575e0f3704e7563048eea6d26844bdfc494b) It is common that an organization distributes binary keyrings with signature cache (Tag 12, Trust Packet) and people use gpgv to validate signature with such keyrings. In such a use case, it is possible that the key validation itself is skipped. For the purpose of gpgv validation of signatures, we should not depend on signature cache in keyrings (if any), but we should validate the key by its self signature for primary key, and back signature for subkey. Signed-off-by: NIIBE Yutaka --- g10/gpgv.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/g10/gpgv.c b/g10/gpgv.c index b700f17ac..3b48a0e66 100644 --- a/g10/gpgv.c +++ b/g10/gpgv.c @@ -163,6 +163,8 @@ main( int argc, char **argv ) opt.pgp2_workarounds = 1; opt.keyserver_options.options|=KEYSERVER_AUTO_KEY_RETRIEVE; opt.trust_model = TM_ALWAYS; + opt.no_sig_cache = 1; + opt.flags.require_cross_cert = 1; opt.batch = 1; opt.homedir = default_homedir (); -- cgit v1.2.3