Update X25519 key format in evptests.txt

Reviewed-by: NRich Salz <rsalz@openssl.org>

test/evptests.txt

@@ -3307,23 +3307,19 @@ SharedSecret=E3CC07DFBDDE76A1139811DB9FF5FAF9D17EF39944F1E77D1F6A208524BF7B1B
 # X25519 test vectors from RFC7748 6.1
 PrivateKey=Alice-25519
 -----BEGIN PRIVATE KEY-----
-MEICAQAwFAYHKoZIzj0CAQYJKwYBBAHaRw8BBCcwJQIBAQQgdwdtCnMYpX08FsFy
-UbJmRd9ML4frwJkqsXf7pR25LCo=
+MC4CAQAwBQYDK2VuBCIEIHcHbQpzGKV9PBbBclGyZkXfTC+H68CZKrF3+6UduSwq
 -----END PRIVATE KEY-----
 PublicKey=Alice-25519-PUBLIC
 -----BEGIN PUBLIC KEY-----
-MDkwFAYHKoZIzj0CAQYJKwYBBAHaRw8BAyEAhSDwCYkwp1R0i33ctD73Wg2/Og0m
-OBr066SpjqqbTmo=
+MCowBQYDK2VuAyEAhSDwCYkwp1R0i33ctD73Wg2/Og0mOBr066SpjqqbTmo=
 -----END PUBLIC KEY-----
 PrivateKey=Bob-25519
 -----BEGIN PRIVATE KEY-----
-MEICAQAwFAYHKoZIzj0CAQYJKwYBBAHaRw8BBCcwJQIBAQQgXasIfmJKikt54X+L
-g4AO5m87sSkmGLb9HC+LJ/+I4Os=
+MC4CAQAwBQYDK2VuBCIEIF2rCH5iSopLeeF/i4OADuZvO7EpJhi2/Rwviyf/iODr
 -----END PRIVATE KEY-----
 PublicKey=Bob-25519-PUBLIC
 -----BEGIN PUBLIC KEY-----
-MDkwFAYHKoZIzj0CAQYJKwYBBAHaRw8BAyEA3p7bfXt9wbTTW2HC7OQ1Nz+DQ8hb
-eGdNrfx+FG+IK08=
+MCowBQYDK2VuAyEA3p7bfXt9wbTTW2HC7OQ1Nz+DQ8hbeGdNrfx+FG+IK08=
 -----END PUBLIC KEY-----
 
 Derive=Alice-25519
@@ -3333,15 +3329,3 @@ SharedSecret=4A5D9D5BA4CE2DE1728E3BF480350F25E07E21C947D19E3376F09B3C1E161742
 Derive=Bob-25519
 PeerKey=Alice-25519-PUBLIC
 SharedSecret=4A5D9D5BA4CE2DE1728E3BF480350F25E07E21C947D19E3376F09B3C1E161742
-# Try to sign/verify using X25519 keys: both return errors.
-Sign = Alice-25519
-Ctrl = digest:SHA256
-Input = "0123456789ABCDEF1234"
-Output = 30
-Result = KEYOP_ERROR
-
-Verify = Alice-25519-PUBLIC
-Ctrl = digest:SHA256
-Input = "0123456789ABCDEF1234"
-Output = 30
-Result = VERIFY_ERROR