Add tests for x509parse_key_ec()
Test files were generated as follows:
openssl ecparam -name prime192v1 -genkey > key.pem
openssl ec -in key.pem -pubout -outform PEM > pub.pem
openssl ec -in key.pem -pubout -outform DER > pub.der
openssl ec -in key.pem -outform pem > prv.sec1.pem
openssl ec -in key.pem -outform der > prv.sec1.der
openssl ec -in key.pem -des -passout pass:polar -outform pem > prv.sec1.pw.pem
openssl pkcs8 -topk8 -in key.pem -nocrypt -outform pem > prv.pk8.pem
openssl pkcs8 -topk8 -in key.pem -nocrypt -outform der > prv.pk8.der
openssl pkcs8 -topk8 -in key.pem -passout pass:polar -outform der \
> prv.pk8.pw.der
openssl pkcs8 -topk8 -in key.pem -passout pass:polar -outform pem \
> prv.pk8.pw.pem
diff --git a/tests/data_files/ec_prv.pk8.pw.pem b/tests/data_files/ec_prv.pk8.pw.pem
new file mode 100644
index 0000000..0b50cd7
--- /dev/null
+++ b/tests/data_files/ec_prv.pk8.pw.pem
@@ -0,0 +1,6 @@
+-----BEGIN ENCRYPTED PRIVATE KEY-----
+MIGXMBsGCSqGSIb3DQEFAzAOBAiO5a+OuKjOdwICCAAEeGEBv8oxHZy3GvR28QHJ
+Xq1Fq/UZrWklH6RI8VTx4WS6UK88PzJSmLMxO3pl4L/CUNfJ4RI9+YHFRZyf8Tcr
+5di4xMQaEqh08PXwyErqOerBGc9DsFpcpFAsn6Sa9KLG5aritGrSkPyDACloHyKR
+lJyTE6fTVwG5xQ==
+-----END ENCRYPTED PRIVATE KEY-----