Add test for limit on intermediate certificates
Inspired by test code provided by Nicholas Wilson in PR #351.
The test will fail if someone sets MAX_INTERMEDIATE_CA to a value larger than
18 (default is 8), which is hopefully unlikely and can easily be fixed by
running long.sh again with a larger value if it ever happens.
Current behaviour is suboptimal as flags are not set, but currently the goal
is only to document/test existing behaviour.
diff --git a/tests/data_files/dir-maxpath/Readme.txt b/tests/data_files/dir-maxpath/Readme.txt
new file mode 100644
index 0000000..8ce0433
--- /dev/null
+++ b/tests/data_files/dir-maxpath/Readme.txt
@@ -0,0 +1,10 @@
+These certificates from a very long chain, used to test the
+MBEDTLS_X509_MAX_INT_CA limit.
+
+NN.key is the private key of certificate NN.crt.
+
+The root is 00.crt and N+1.crt is a child of N.crt.
+
+File cNN.pem contains the chain NN.crt to 00.crt.
+
+Those certificates where generated by long.sh.