Adapt test files to supported PKCS#8 modes

openssl pkcs8 -topk8 -in ec_prv.sec1.pem -passout pass:polar \
    -v1 PBE-SHA1-RC4-128 -outform der -out ec_prv.pk8.pw.der
openssl pkcs8 -topk8 -in ec_prv.sec1.pem -passout pass:polar \
    -v1 PBE-SHA1-RC4-128 -outform pem -out ec_prv.pk8.pw.pem
diff --git a/tests/data_files/ec_prv.pk8.pw.der b/tests/data_files/ec_prv.pk8.pw.der
index efcd809..db0b5bd 100644
--- a/tests/data_files/ec_prv.pk8.pw.der
+++ b/tests/data_files/ec_prv.pk8.pw.der
Binary files differ
diff --git a/tests/data_files/ec_prv.pk8.pw.pem b/tests/data_files/ec_prv.pk8.pw.pem
index 0b50cd7..7413d1e 100644
--- a/tests/data_files/ec_prv.pk8.pw.pem
+++ b/tests/data_files/ec_prv.pk8.pw.pem
@@ -1,6 +1,6 @@
 -----BEGIN ENCRYPTED PRIVATE KEY-----
-MIGXMBsGCSqGSIb3DQEFAzAOBAiO5a+OuKjOdwICCAAEeGEBv8oxHZy3GvR28QHJ
-Xq1Fq/UZrWklH6RI8VTx4WS6UK88PzJSmLMxO3pl4L/CUNfJ4RI9+YHFRZyf8Tcr
-5di4xMQaEqh08PXwyErqOerBGc9DsFpcpFAsn6Sa9KLG5aritGrSkPyDACloHyKR
-lJyTE6fTVwG5xQ==
+MIGRMBwGCiqGSIb3DQEMAQEwDgQIIrlmCCSpJzcCAggABHGm2LyJ60ojfilRRp8h
+Xf+sWL3lJq6wlj4Nk41SHVnZ2RiVtP5NVK908/WxnXkridd6Qpjnq/14woWVmQxT
+IzhKFVi22YmQyBsNj+bEGDAE4c9qaby8u6zbzs7Qj29F90f/PiYsaIEGcNn/W88e
+XarNDw==
 -----END ENCRYPTED PRIVATE KEY-----