Add test for invalid IP length (+use der format in tests)

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
index 070a8f7..6348616 100644
--- a/tests/data_files/Makefile
+++ b/tests/data_files/Makefile
@@ -339,8 +339,12 @@
 server5-fan.crt: server5.key
 	$(OPENSSL) req -x509 -new -subj "/C=UK/O=Mbed TLS/CN=Mbed TLS FAN" -set_serial 77 -config $(test_ca_config_file) -extensions fan_cert -days 3650 -sha256 -key server5.key -out $@
 
-server5-tricky-ip-san.crt: server5.key
-	$(OPENSSL) req -x509 -new -subj "/C=UK/O=Mbed TLS/CN=Mbed TLS Tricky IP SAN" -set_serial 77 -config $(test_ca_config_file) -extensions tricky_ip_san -days 3650 -sha256 -key server5.key -out $@
+server5-tricky-ip-san.crt.der: server5.key
+	$(OPENSSL) req -x509 -new -subj "/C=UK/O=Mbed TLS/CN=Mbed TLS Tricky IP SAN" -set_serial 77 -config $(test_ca_config_file) -extensions tricky_ip_san -days 3650 -sha256 -key server5.key -outform der -out $@
+
+# malformed IP length
+server5-tricky-ip-san-malformed-len.crt.der: server5-tricky-ip-san.crt.der
+	hexdump -ve '1/1 "%.2X"' $< | sed "s/87046162636487106162/87056162636487106162/" | xxd -r -p > $@
 
 server5-directoryname.crt.der: server5.key
 	$(OPENSSL) req -x509 -outform der -new -subj "/C=UK/O=Mbed TLS/CN=Mbed TLS directoryName SAN" -set_serial 77 -config $(test_ca_config_file) -extensions directory_name_san -days 3650 -sha256 -key server5.key -out $@
diff --git a/tests/data_files/server5-tricky-ip-san-malformed-len.crt.der b/tests/data_files/server5-tricky-ip-san-malformed-len.crt.der
new file mode 100644
index 0000000..a26da6c
--- /dev/null
+++ b/tests/data_files/server5-tricky-ip-san-malformed-len.crt.der
Binary files differ
diff --git a/tests/data_files/server5-tricky-ip-san.crt b/tests/data_files/server5-tricky-ip-san.crt
deleted file mode 100644
index 135830f..0000000
--- a/tests/data_files/server5-tricky-ip-san.crt
+++ /dev/null
@@ -1,11 +0,0 @@
------BEGIN CERTIFICATE-----
-MIIBljCCATygAwIBAgIBTTAKBggqhkjOPQQDAjBBMQswCQYDVQQGEwJVSzERMA8G
-A1UECgwITWJlZCBUTFMxHzAdBgNVBAMMFk1iZWQgVExTIFRyaWNreSBJUCBTQU4w
-HhcNMjAwNzIzMTAyNzQ2WhcNMzAwNzIxMTAyNzQ2WjBBMQswCQYDVQQGEwJVSzER
-MA8GA1UECgwITWJlZCBUTFMxHzAdBgNVBAMMFk1iZWQgVExTIFRyaWNreSBJUCBT
-QU4wWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQ3zFbZdgkeWnI+x1kt/yBu7nz5
-BpF00K0UtfdoIllikk7lANgjEf/qL9I0XV0WvYqIwmt3DVXNiioO+gHItO3/oyUw
-IzAhBgNVHREEGjAYhwRhYmNkhxBhYmNkLmV4YW1wbGUuY29tMAoGCCqGSM49BAMC
-A0gAMEUCIFDc8ZALA/9Zv7dZTWrZOOp/dgPAEJRT+h68nD6KF+XyAiEAs1QqugOo
-Dwru0DSEmpYkmj1Keunpd0VopM0joC1cc5A=
------END CERTIFICATE-----
diff --git a/tests/data_files/server5-tricky-ip-san.crt.der b/tests/data_files/server5-tricky-ip-san.crt.der
new file mode 100644
index 0000000..0bd06f8
--- /dev/null
+++ b/tests/data_files/server5-tricky-ip-san.crt.der
Binary files differ