diff --git a/tests/data_files/Makefile b/tests/data_files/Makefile
index fb65a2b..99d64eb 100644
--- a/tests/data_files/Makefile
+++ b/tests/data_files/Makefile
@@ -44,7 +44,7 @@
 all_intermediate += test-ca.req.sha256
 
 test-ca.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
-	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144400 not_after=20210212144400 md=SHA1 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144400 not_after=20290210144400 md=SHA1 version=3 output_file=$@
 all_final += test-ca.crt
 
 test-ca.crt.der: test-ca.crt
@@ -56,7 +56,7 @@
 all_final += test-ca.key.der
 
 test-ca-sha1.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
-	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144400 not_after=20210212144400 md=SHA1 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144400 not_after=20290210144400 md=SHA1 version=3 output_file=$@
 all_final += test-ca-sha1.crt
 
 test-ca-sha1.crt.der: test-ca-sha1.crt
@@ -64,16 +64,34 @@
 all_final += test-ca-sha1.crt.der
 
 test-ca-sha256.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
-	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144400 not_after=20210212144400 md=SHA256 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=3 request_file=test-ca.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test CA" issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144400 not_after=20290210144400 md=SHA256 version=3 output_file=$@
 all_final += test-ca-sha256.crt
 
 test-ca-sha256.crt.der: test-ca-sha256.crt
 	$(OPENSSL) x509 -in $< -out $@ -inform PEM -outform DER
 all_final += test-ca-sha256.crt.der
 
+test-ca_utf8.crt: $(test_ca_key_file_rsa)
+	$(OPENSSL) req -x509 -new -nodes -key $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 3 -config $(test_ca_config_file) -sha1 -days 3653 -utf8 -subj "/C=NL/O=PolarSSL/CN=PolarSSL Test CA" -out $@
+all_final += test-ca_utf8.crt
+
+test-ca_printable.crt: $(test_ca_key_file_rsa)
+	$(OPENSSL) req -x509 -new -nodes -key $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 3 -config $(test_ca_config_file) -sha1 -days 3653 -subj "/C=NL/O=PolarSSL/CN=PolarSSL Test CA" -out $@
+all_final += test-ca_printable.crt
+
+test-ca_uppercase.crt: $(test_ca_key_file_rsa)
+	$(OPENSSL) req -x509 -new -nodes -key $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 3 -config $(test_ca_config_file) -sha1 -days 3653 -subj "/C=NL/O=PolarSSL/CN=PolarSSL Test CA" -out $@
+all_final += test-ca_uppercase.crt
+
 test_ca_key_file_rsa_alt = test-ca-alt.key
 
-$(test_ca_key_file_rsa_alt):
+cert_example_multi.csr: rsa_pkcs1_1024_clear.pem
+	$(OPENSSL) req -new -subj "/C=NL/O=PolarSSL/CN=www.example.com" -set_serial 17 -config $(test_ca_config_file) -extensions dns_alt_names -days 3650 -key rsa_pkcs1_1024_clear.pem -out $@
+
+cert_example_multi.crt: cert_example_multi.csr
+	$(OPENSSL) x509 -req -CA $(test_ca_crt) -CAkey $(test_ca_key_file_rsa) -extfile $(test_ca_config_file) -extensions dns_alt_names -passin "pass:$(test_ca_pwd_rsa)" -set_serial 17 -days 3653 -sha256 -in $< > $@
+
+$(test_ca_key_file_rsa_alt):test-ca.opensslconf
 	$(OPENSSL) genrsa -out $@ 2048
 test-ca-alt.csr: $(test_ca_key_file_rsa_alt) $(test_ca_config_file)
 	$(OPENSSL) req -new -config $(test_ca_config_file) -key $(test_ca_key_file_rsa_alt) -subj "/C=NL/O=PolarSSL/CN=PolarSSL Test CA" -out $@
@@ -91,6 +109,14 @@
 test_ca_crt_file_ec = test-ca2.crt
 test_ca_key_file_ec = test-ca2.key
 
+test-ca2.req.sha256: $(test_ca_key_file_ec)
+	$(MBEDTLS_CERT_REQ) output_file=$@ filename=$(test_ca_key_file_ec) subject_name="C=NL,O=PolarSSL,CN=Polarssl Test EC CA" md=SHA256
+all_intermediate += test-ca2.req.sha256
+
+test-ca2.crt: $(test_ca_key_file_ec) test-ca2.req.sha256
+	$(MBEDTLS_CERT_WRITE) is_ca=1 serial=13926223505202072808 request_file=test-ca2.req.sha256 selfsign=1 issuer_name="C=NL,O=PolarSSL,CN=Polarssl Test EC CA" issuer_key=$(test_ca_key_file_ec) not_before=20190210144400 not_after=20290210144400 md=SHA256 version=3 output_file=$@
+all_final += test-ca.crt
+
 test-ca-any_policy.crt: $(test_ca_key_file_rsa) test-ca.req.sha256
 	$(OPENSSL) req -x509 -config $(test_ca_config_file) -extensions v3_any_policy_ca -key $(test_ca_key_file_rsa) -passin "pass:$(test_ca_pwd_rsa)" -set_serial 0 -days 3653 -sha256 -in test-ca.req.sha256 -out $@
 all_final += test-ca-any_policy.crt
@@ -152,6 +178,9 @@
 	$(FAKETIME) -f -3653d $(OPENSSL) x509 -req -extfile $(test_ca_config_file) -extensions v3_ca -CA $(test_ca_crt_file_ec) -CAkey $(test_ca_key_file_ec) -set_serial 14 -days 3653 -sha256 -in test-int-ca.csr -out $@
 all_final += test-int-ca-exp.crt
 
+enco-cert-utf8str.pem: rsa_pkcs1_1024_clear.pem
+	$(MBEDTLS_CERT_WRITE) subject_key=rsa_pkcs1_1024_clear.pem subject_name="CN=dw.yonan.net" issuer_crt=enco-ca-prstr.pem issuer_key=rsa_pkcs1_1024_clear.pem not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
+
 crl-idp.pem: $(test_ca_crt) $(test_ca_key_file_rsa) $(test_ca_config_file)
 	$(OPENSSL) ca -gencrl -batch -cert $(test_ca_crt) -keyfile $(test_ca_key_file_rsa) -key $(test_ca_pwd_rsa) -config $(test_ca_config_file) -name test_ca -md sha256 -crldays 3653 -crlexts crl_ext_idp -out $@
 all_final += crl-idp.pem
@@ -167,10 +196,10 @@
 all_intermediate += cli-rsa.csr
 
 cli-rsa-sha1.crt: cli-rsa.csr
-	$(MBEDTLS_CERT_WRITE) request_file=$< serial=4 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144406 not_after=20210212144406 md=SHA1 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=$< serial=4 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
 
 cli-rsa-sha256.crt: cli-rsa.csr
-	$(MBEDTLS_CERT_WRITE) request_file=$< serial=4 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144406 not_after=20210212144406 md=SHA256 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=$< serial=4 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA256 version=3 output_file=$@
 all_final += cli-rsa-sha256.crt
 
 cli-rsa-sha256.crt.der: cli-rsa-sha256.crt
@@ -199,6 +228,14 @@
 	cat server7.crt test-int-ca-exp.crt > $@
 all_final += server7_int-ca-exp.crt
 
+cli2.req.sha256: cli2.key
+	$(MBEDTLS_CERT_REQ) output_file=$@ filename=$< subject_name="C=NL,O=PolarSSL,CN=PolarSSL Test Client 2" md=SHA256
+
+all_final += server1.req.sha1
+cli2.crt: cli2.req.sha256
+	$(MBEDTLS_CERT_WRITE) request_file=cli2.req.sha256 serial=13 selfsign=0 issuer_name="C=NL,O=PolarSSL,CN=PolarSSL Test EC CA" issuer_key=$(test_ca_key_file_ec) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144400 not_after=20290210144400 md=SHA256 version=3 output_file=$@
+all_final += cli2.crt
+
 cli2.crt.der: cli2.crt
 	$(OPENSSL) x509 -in $< -out $@ -inform PEM -outform DER
 all_final += cli2.crt.der
@@ -928,35 +965,65 @@
 # server1*
 
 server1.crt: server1.key server1.req.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
-	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20110212144406 not_after=20210212144406 md=SHA1 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
 server1.noauthid.crt: server1.key server1.req.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
-	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144406 not_after=20210212144406 md=SHA1 authority_identifier=0 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA1 authority_identifier=0 version=3 output_file=$@
 server1.crt.der: server1.crt
+	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA1 authority_identifier=0 version=3 output_file=$@
+server1.der: server1.crt
 	$(OPENSSL) x509 -inform PEM -in $< -outform DER -out $@
 all_final += server1.crt server1.noauthid.crt server1.crt.der
 
 server1.key_usage.crt: server1.key server1.req.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
-	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20110212144406 not_after=20210212144406 md=SHA1 key_usage=digital_signature,non_repudiation,key_encipherment version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 key_usage=digital_signature,non_repudiation,key_encipherment version=3 output_file=$@
 server1.key_usage_noauthid.crt: server1.key server1.req.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
-	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20110212144406 not_after=20210212144406 md=SHA1 key_usage=digital_signature,non_repudiation,key_encipherment authority_identifier=0 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 key_usage=digital_signature,non_repudiation,key_encipherment authority_identifier=0 version=3 output_file=$@
 server1.key_usage.der: server1.key_usage.crt
 	$(OPENSSL) x509 -inform PEM -in $< -outform DER -out $@
 all_final += server1.key_usage.crt server1.key_usage_noauthid.crt server1.key_usage.der
 
 server1.cert_type.crt: server1.key server1.req.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
-	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20110212144406 not_after=20210212144406 md=SHA1 ns_cert_type=ssl_server version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 ns_cert_type=ssl_server version=3 output_file=$@
 server1.cert_type_noauthid.crt: server1.key server1.req.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
-	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20110212144406 not_after=20210212144406 md=SHA1 ns_cert_type=ssl_server authority_identifier=0 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 ns_cert_type=ssl_server authority_identifier=0 version=3 output_file=$@
 server1.cert_type.der: server1.cert_type.crt
 	$(OPENSSL) x509 -inform PEM -in $< -outform DER -out $@
 all_final += server1.cert_type.crt server1.cert_type_noauthid.crt server1.cert_type.der
 
 server1.v1.crt: server1.key server1.req.sha256 $(test_ca_crt) $(test_ca_key_file_rsa)
-	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20110212144406 not_after=20210212144406 md=SHA1 version=1 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server1.req.sha256 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) version=1 not_before=20190210144406 not_after=20290210144406 md=SHA1 version=1 output_file=$@
 server1.v1.der: server1.v1.crt
 	$(OPENSSL) x509 -inform PEM -in $< -outform DER -out $@
 all_final += server1.v1.crt server1.v1.der
 
+server1_ca.crt: server1.crt $(test_ca_crt)
+	cat server1.crt $(test_ca_crt) > $@
+all_final += server1_ca.crt
+
+cert_sha1.crt: server1.key
+	$(MBEDTLS_CERT_WRITE) subject_key=server1.key subject_name="C=NL, O=PolarSSL, CN=PolarSSL Cert SHA1" serial=7 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
+all_final += cert_sha1.crt
+
+cert_sha224.crt: server1.key
+	$(MBEDTLS_CERT_WRITE) subject_key=server1.key subject_name="C=NL, O=PolarSSL, CN=PolarSSL Cert SHA224" serial=8 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA224 version=3 output_file=$@
+all_final += cert_sha224.crt
+
+cert_sha256.crt: server1.key
+	$(MBEDTLS_CERT_WRITE) subject_key=server1.key subject_name="C=NL, O=PolarSSL, CN=PolarSSL Cert SHA256" serial=9 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA256 version=3 output_file=$@
+all_final += cert_sha256.crt
+
+cert_sha384.crt: server1.key
+	$(MBEDTLS_CERT_WRITE) subject_key=server1.key subject_name="C=NL, O=PolarSSL, CN=PolarSSL Cert SHA384" serial=10 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA384 version=3 output_file=$@
+all_final += cert_sha384.crt
+
+cert_sha512.crt: server1.key
+	$(MBEDTLS_CERT_WRITE) subject_key=server1.key subject_name="C=NL, O=PolarSSL, CN=PolarSSL Cert SHA512" serial=11 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA512 version=3 output_file=$@
+all_final += cert_sha512.crt
+
+cert_example_wildcard.crt: server1.key
+	$(MBEDTLS_CERT_WRITE) subject_key=server1.key subject_name="C=NL, O=PolarSSL, CN=*.example.com" serial=12 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
+all_final += cert_example_wildcard.crt
+
 # OpenSSL-generated certificates for comparison
 # Also provide certificates in DER format to allow
 # direct binary comparison using e.g. dumpasn1
@@ -992,11 +1059,15 @@
 # server2*
 
 server2.crt: server2.req.sha256
-	$(MBEDTLS_CERT_WRITE) request_file=server2.req.sha256 serial=2 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144406 not_after=20210212144406 md=SHA1 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server2.req.sha256 serial=2 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA1 version=3 output_file=$@
 all_final += server2.crt
 
+server2.der: server2.crt
+	$(OPENSSL) x509 -inform PEM -in $< -outform DER -out $@
+all_final += server2.crt server2.der
+
 server2-sha256.crt: server2.req.sha256
-	$(MBEDTLS_CERT_WRITE) request_file=server2.req.sha256 serial=2 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20110212144406 not_after=20210212144406 md=SHA256 version=3 output_file=$@
+	$(MBEDTLS_CERT_WRITE) request_file=server2.req.sha256 serial=2 issuer_crt=$(test_ca_crt) issuer_key=$(test_ca_key_file_rsa) issuer_pwd=$(test_ca_pwd_rsa) not_before=20190210144406 not_after=20290210144406 md=SHA256 version=3 output_file=$@
 all_final += server2-sha256.crt
 
 # MD2, MD4, MD5 test certificates