From 376151481b2172dbb08d25bb5946f0f627f7453d Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Tue, 18 Jul 2017 00:37:03 -0700 Subject: [PATCH] Port gnutls.c to older (buggier?) GnuTLS Problem reported for GnuTLS 3.2.1 by Glenn Morris in: http://lists.gnu.org/archive/html/emacs-devel/2017-07/msg00716.html http://lists.gnu.org/archive/html/emacs-devel/2017-07/msg00742.html Although I don't see how this bug can occur with vanilla GnuTLS 3.2.1, perhaps hydra was using a modified GnuTLS. * src/gnutls.c (Fgnutls_ciphers): Don't assume GNUTLS_CIPHER_NULL is at the end of the list returned by gnutls_cipher_list, or that the earlier ciphers all have non-null names. --- src/gnutls.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/src/gnutls.c b/src/gnutls.c index 9fbaea2..e406d66 100644 --- a/src/gnutls.c +++ b/src/gnutls.c @@ -1854,12 +1854,17 @@ The alist key is the cipher name. */) #ifdef HAVE_GNUTLS3_CIPHER const gnutls_cipher_algorithm_t *gciphers = gnutls_cipher_list (); - for (ptrdiff_t pos = 0; gciphers[pos] != GNUTLS_CIPHER_NULL; pos++) + for (ptrdiff_t pos = 0; gciphers[pos] != 0; pos++) { gnutls_cipher_algorithm_t gca = gciphers[pos]; + if (gca == GNUTLS_CIPHER_NULL) + continue; + char const *cipher_name = gnutls_cipher_get_name (gca); + if (!cipher_name) + continue; /* A symbol representing the GnuTLS cipher. */ - Lisp_Object cipher_symbol = intern (gnutls_cipher_get_name (gca)); + Lisp_Object cipher_symbol = intern (cipher_name); ptrdiff_t cipher_tag_size = gnutls_cipher_get_tag_size (gca); -- 2.7.4