data_files: add EC secp256r1 private key data files in SEC1 format

Signed-off-by: Valerio Setti <vsetti@baylibre.com>

data_files/Makefile

@@ -1839,6 +1839,19 @@ ec_prv.sec1.der: ec_prv.sec1.pem
 	$(OPENSSL) pkey -in $< -out $@ -outform DER
 all_final += ec_prv.sec1.der
 
+ec_256_prv.sec1.der:
+	$(OPENSSL) ecparam -name prime256v1 -genkey -outform DER -noout -out $@
+all_final += ec_256_prv.sec1.der
+
+ec_256_prv.sec1.pem:
+	$(OPENSSL) ec -in $< -out $@ -outform PEM
+all_final += ec_256_prv.sec1.pem
+
+ec_256_prv.sec1.comp.pem:
+	$(OPENSSL) ec -in $< -out $@ -outform PEM
+	$(OPENSSL) ec -in $< -conv_form compressed -outform PEM -out $@
+all_final += ec_256_prv.sec1.pem
+
 ec_256_long_prv.der: ec_256_long_prv.pem
 	$(OPENSSL) pkey -in $< -out $@ -outform DER
 all_final += ec_256_long_prv.der

data_files/ec_256_prv.sec1.comp.pem

@@ -0,0 +1,4 @@
+-----BEGIN EC PRIVATE KEY-----
+MFcCAQEEIHnN8ULAX3r6RNctg8/Hfll6p/QgJXJ6Y4XgsLeJbWV8oAoGCCqGSM49
+AwEHoSQDIgACCEh3UFIe6UZVzKk6zmLN74VtxjvoVZYxs4WckNUPGSY=
+-----END EC PRIVATE KEY-----

data_files/ec_256_prv.sec1.pem

@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIHnN8ULAX3r6RNctg8/Hfll6p/QgJXJ6Y4XgsLeJbWV8oAoGCCqGSM49
+AwEHoUQDQgAECEh3UFIe6UZVzKk6zmLN74VtxjvoVZYxs4WckNUPGSaYbGCf7xGr
+DKjYXOp+5gSGxtCLBAltIFHd4ctGTyFaWg==
+-----END EC PRIVATE KEY-----