Add test for CA forgery attempt
As we accept EE certs that are explicitly trusted (in the list of trusted
roots) and usually look for parent by subject, and in the future we might want
to avoid checking the self-signature on trusted certs, there could a risk that we
incorrectly accept a cert that looks like a trusted root except it doesn't
have the same key. This test ensures this will never happen.
diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
index d7a57a9..07998bd 100644
--- a/tests/data_files/Makefile
+++ b/tests/data_files/Makefile
@@ -99,6 +99,13 @@
$(FAKETIME) -f -3653d $(OPENSSL) req -x509 -new -subj "/C=UK/O=mbed TLS/OU=testsuite/CN=localhost" -days 3653 -sha256 -key $< -out $@
all_final += server5-ss-expired.crt
+# try to forge a copy of test-int-ca3 with different key
+server5-ss-forgeca.crt: server5.key
+ $(FAKETIME) '2015-09-01 14:08:43' $(OPENSSL) req -x509 -new -subj "/C=UK/O=mbed TLS/CN=mbed TLS Test intermediate CA 3" -set_serial 77 -config $(test_ca_config_file) -extensions noext_ca -days 3650 -sha256 -key $< -out $@
+all_final += server5-ss-forgeca.crt
+
+
+
################################################################
#### Generate various RSA keys
diff --git a/tests/data_files/server5-ss-forgeca.crt b/tests/data_files/server5-ss-forgeca.crt
new file mode 100644
index 0000000..bfd7b70
--- /dev/null
+++ b/tests/data_files/server5-ss-forgeca.crt
@@ -0,0 +1,11 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/tests/data_files/test-ca.opensslconf b/tests/data_files/test-ca.opensslconf
index 12835df..343d75e 100644
--- a/tests/data_files/test-ca.opensslconf
+++ b/tests/data_files/test-ca.opensslconf
@@ -11,3 +11,6 @@
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid:always,issuer:always
basicConstraints = CA:true
+
+[noext_ca]
+basicConstraints = CA:true