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-rw-r--r--NEWS3
-rw-r--r--dirmngr/ks-engine-hkp.c2
-rw-r--r--dirmngr/server.c32
3 files changed, 36 insertions, 1 deletions
diff --git a/NEWS b/NEWS
index 7547b2aa1..ca84e2089 100644
--- a/NEWS
+++ b/NEWS
@@ -19,6 +19,9 @@ Noteworthy changes in version 2.2.7 (unreleased)
* dirmngr: Fix a regression since 2.1.16 which caused corrupted CRL
caches under Windows. [#2448,#3923]
+ * dirmngr: Fix a CNAME problem with pools and TLS. Also use a fixed
+ mapping of keys.gnupg.net to sks-keyservers.net. [#3755]
+
Noteworthy changes in version 2.2.6 (2018-04-09)
------------------------------------------------
diff --git a/dirmngr/ks-engine-hkp.c b/dirmngr/ks-engine-hkp.c
index a9bb93666..eba7a1a48 100644
--- a/dirmngr/ks-engine-hkp.c
+++ b/dirmngr/ks-engine-hkp.c
@@ -583,7 +583,7 @@ map_host (ctrl_t ctrl, const char *name, const char *srvtag, int force_reselect,
/* Deal with the pool name before selecting a host. */
if (r_httphost)
{
- *r_httphost = xtrystrdup (hi->cname? hi->cname : hi->name);
+ *r_httphost = xtrystrdup (hi->name);
if (!*r_httphost)
return gpg_error_from_syserror ();
}
diff --git a/dirmngr/server.c b/dirmngr/server.c
index 8a0b940ce..b7cdb24c9 100644
--- a/dirmngr/server.c
+++ b/dirmngr/server.c
@@ -1997,6 +1997,38 @@ make_keyserver_item (const char *uri, uri_item_t *r_item)
uri_item_t item;
*r_item = NULL;
+
+ /* We used to have DNS CNAME redirection from the URLs below to
+ * sks-keyserver. pools. The idea was to allow for a quick way to
+ * switch to a different set of pools. The problem with that
+ * approach is that TLS needs to verify the hostname and - because
+ * DNS is not secured - it can only check the user supplied hostname
+ * and not a hostname from a CNAME RR. Thus the final server all
+ * need to have certificates with the actual pool name as well as
+ * for keys.gnupg.net - that would render the advantage of
+ * keys.gnupg.net useless and so we better give up on this. Because
+ * the keys.gnupg.net URL are still in widespread use we do a static
+ * mapping here.
+ */
+ if (!strcmp (uri, "hkps://keys.gnupg.net")
+ || !strcmp (uri, "keys.gnupg.net"))
+ uri = "hkps://hkps.pool.sks-keyservers.net";
+ else if (!strcmp (uri, "https://keys.gnupg.net"))
+ uri = "https://hkps.pool.sks-keyservers.net";
+ else if (!strcmp (uri, "hkp://keys.gnupg.net"))
+ uri = "hkp://hkps.pool.sks-keyservers.net";
+ else if (!strcmp (uri, "http://keys.gnupg.net"))
+ uri = "http://hkps.pool.sks-keyservers.net";
+ else if (!strcmp (uri, "hkps://http-keys.gnupg.net")
+ || !strcmp (uri, "http-keys.gnupg.net"))
+ uri = "hkps://ha.pool.sks-keyservers.net";
+ else if (!strcmp (uri, "https://http-keys.gnupg.net"))
+ uri = "https://ha.pool.sks-keyservers.net";
+ else if (!strcmp (uri, "hkp://http-keys.gnupg.net"))
+ uri = "hkp://ha.pool.sks-keyservers.net";
+ else if (!strcmp (uri, "http://http-keys.gnupg.net"))
+ uri = "http://ha.pool.sks-keyservers.net";
+
item = xtrymalloc (sizeof *item + strlen (uri));
if (!item)
return gpg_error_from_syserror ();