Add build instructions to generate DER versions of CRTs and keys
diff --git a/tests/suites/test_suite_x509parse.data b/tests/suites/test_suite_x509parse.data
index ec5c057..90e2da1 100644
--- a/tests/suites/test_suite_x509parse.data
+++ b/tests/suites/test_suite_x509parse.data
@@ -12,7 +12,7 @@
X509 Certificate information #2 (DER)
depends_on:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
-x509_cert_info:"data_files/server2.der":"cert. version \: 3\nserial number \: 02\nissuer name \: C=NL, O=PolarSSL, CN=PolarSSL Test CA\nsubject name \: C=NL, O=PolarSSL, CN=localhost\nissued on \: 2011-02-12 14\:44\:06\nexpires on \: 2021-02-12 14\:44\:06\nsigned using \: RSA with SHA1\nRSA key size \: 2048 bits\nbasic constraints \: CA=false\n"
+x509_cert_info:"data_files/server2.crt.der":"cert. version \: 3\nserial number \: 02\nissuer name \: C=NL, O=PolarSSL, CN=PolarSSL Test CA\nsubject name \: C=NL, O=PolarSSL, CN=localhost\nissued on \: 2011-02-12 14\:44\:06\nexpires on \: 2021-02-12 14\:44\:06\nsigned using \: RSA with SHA1\nRSA key size \: 2048 bits\nbasic constraints \: CA=false\n"
X509 Certificate information #3
depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
@@ -20,7 +20,7 @@
X509 Certificate information #3 (DER)
depends_on:MBEDTLS_RSA_C:MBEDTLS_SHA1_C
-x509_cert_info:"data_files/test-ca.der":"cert. version \: 3\nserial number \: 03\nissuer name \: C=NL, O=PolarSSL, CN=PolarSSL Test CA\nsubject name \: C=NL, O=PolarSSL, CN=PolarSSL Test CA\nissued on \: 2011-02-12 14\:44\:00\nexpires on \: 2021-02-12 14\:44\:00\nsigned using \: RSA with SHA1\nRSA key size \: 2048 bits\nbasic constraints \: CA=true\n"
+x509_cert_info:"data_files/test-ca.crt.der":"cert. version \: 3\nserial number \: 03\nissuer name \: C=NL, O=PolarSSL, CN=PolarSSL Test CA\nsubject name \: C=NL, O=PolarSSL, CN=PolarSSL Test CA\nissued on \: 2011-02-12 14\:44\:00\nexpires on \: 2021-02-12 14\:44\:00\nsigned using \: RSA with SHA1\nRSA key size \: 2048 bits\nbasic constraints \: CA=true\n"
X509 Certificate information MD2 Digest
depends_on:MBEDTLS_PEM_PARSE_C:MBEDTLS_RSA_C:MBEDTLS_MD2_C