Support for running tests against Heimdal in CI

Signed-off-by: Jordan Borean <jborean93@gmail.com>

Author: jborean93

Diff for: ci/build.sh

@@ -36,8 +36,8 @@ if [ $BUILD_RES -ne 0 ]; then
 fi
 
 # Only call exit on failures so we can source this script
-if [ x"$KRB5_VER" = "xheimdal" ] || [ "$OS_NAME" = "windows" ]; then
-    # heimdal/Windows can't run the tests yet, so just make sure it imports and exit
+if [ "$OS_NAME" = "windows" ]; then
+    # Windows can't run the tests yet, so just make sure it imports and exit
     python -c "import gssapi" || exit $?
 else
     python setup.py nosetests --verbosity=3 || exit $?

Diff for: ci/lib-setup.sh

@@ -8,7 +8,10 @@ setup::debian::install() {
     apt-get update
 
     if [ x"$KRB5_VER" = "xheimdal" ]; then
-        apt-get -y install heimdal-dev
+        apt-get -y install heimdal-{clients,dev,kdc}
+
+        export GSSAPI_KRB5_MAIN_LIB="/usr/lib/x86_64-linux-gnu/libkrb5.so.26"
+        export PATH="/usr/lib/heimdal-servers:${PATH}"
     else
         apt-get -y install krb5-{user,kdc,admin-server,multidev} libkrb5-dev \
                 gss-ntlmssp
@@ -62,6 +65,13 @@ setup::macos::install() {
     python3 -m virtualenv -p $(which python3) .venv
     source .venv/bin/activate
     pip install --install-option='--no-cython-compile' cython
+
+    export GSSAPI_KRB5_MAIN_LIB="/System/Library/PrivateFrameworks/Heimdal.framework/Heimdal"
+
+    # macOS's Heimdal version is buggy, it will only use KRB5_KTNAME if the
+    # env var was set when GSSAPI creates the context. Setting it here to any
+    # value solves that problem for CI.
+    export KRB5_KTNAME=initial
 }
 
 setup::windows::install() {

Diff for: ci/run-on-linux.sh

@@ -3,7 +3,7 @@
 # If we try to use a normal Github Actions container with
 # github-pages-deploy-action, it will fail due to inability to find git.
 
-docker run -h test.box \
+docker run -h test.krbtest.com \
        -v `pwd`:/tmp/build -w /tmp/build \
        -e KRB5_VER=${KRB5_VER:-mit} \
        -e FLAKE=${FLAKE:no} \