diff --git a/tests/data_files/ec_prv.pk8.der b/tests/data_files/ec_prv.pk8.der
new file mode 100644
index 0000000..f2bd2a9
--- /dev/null
+++ b/tests/data_files/ec_prv.pk8.der
Binary files differ
diff --git a/tests/data_files/ec_prv.pk8.pem b/tests/data_files/ec_prv.pk8.pem
new file mode 100644
index 0000000..dbeab7c
--- /dev/null
+++ b/tests/data_files/ec_prv.pk8.pem
@@ -0,0 +1,5 @@
+-----BEGIN PRIVATE KEY-----
+MG8CAQAwEwYHKoZIzj0CAQYIKoZIzj0DAQEEVTBTAgEBBBgzjoaogeI49Um9bwVT
+SUtz49YRMP3GyW2hNAMyAARRdbzfMKNw851Tk+YScojYAWe19LS3dsZ098bzVLfS
+JAYsH2hUtaevD+V46vJY8Cc=
+-----END PRIVATE KEY-----
diff --git a/tests/data_files/ec_prv.pk8.pw.der b/tests/data_files/ec_prv.pk8.pw.der
new file mode 100644
index 0000000..efcd809
--- /dev/null
+++ 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
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-----
diff --git a/tests/data_files/ec_prv.sec1.der b/tests/data_files/ec_prv.sec1.der
new file mode 100644
index 0000000..fe336b7
--- /dev/null
+++ b/tests/data_files/ec_prv.sec1.der
Binary files differ
diff --git a/tests/data_files/ec_prv.sec1.pem b/tests/data_files/ec_prv.sec1.pem
new file mode 100644
index 0000000..a8a7990
--- /dev/null
+++ b/tests/data_files/ec_prv.sec1.pem
@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MF8CAQEEGDOOhqiB4jj1Sb1vBVNJS3Pj1hEw/cbJbaAKBggqhkjOPQMBAaE0AzIA
+BFF1vN8wo3DznVOT5hJyiNgBZ7X0tLd2xnT3xvNUt9IkBiwfaFS1p68P5Xjq8ljw
+Jw==
+-----END EC PRIVATE KEY-----
diff --git a/tests/data_files/ec_prv.sec1.pw.pem b/tests/data_files/ec_prv.sec1.pw.pem
new file mode 100644
index 0000000..62a0860
--- /dev/null
+++ b/tests/data_files/ec_prv.sec1.pw.pem
@@ -0,0 +1,8 @@
+-----BEGIN EC PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: DES-CBC,AA94892A169FA426
+
+gSkFuUENNke5MvkWHc11/w1NQWBxaIxGT+d5oRcqs44D3tltVOwtdnYexoD9uSIL
+wMFFRLL6I5ii1Naa38nPOMaa7kLU2J3jY8SeIH1rQ43X6tlpv9WFGqDn/m6X7oKo
+RMMfGdicPZg=
+-----END EC PRIVATE KEY-----