torture_pki_ed25519: Add tests for private key with passphrase

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>

tests/unittests/torture_pki_ed25519.c

@@ -10,6 +10,7 @@
 #include <fcntl.h>
 
 #define LIBSSH_ED25519_TESTKEY "libssh_testkey.id_ed25519"
+#define LIBSSH_ED25519_TESTKEY_PASSPHRASE "libssh_testkey_passphrase.id_ed25519"
 
 const unsigned char HASH[] = "12345678901234567890";
 const uint8_t ref_signature[ED25519_SIG_LEN]=
@@ -23,10 +24,13 @@ static int setup_ed25519_key(void **state)
     (void) state; /* unused */
 
     unlink(LIBSSH_ED25519_TESTKEY);
+    unlink(LIBSSH_ED25519_TESTKEY_PASSPHRASE);
     unlink(LIBSSH_ED25519_TESTKEY ".pub");
 
     torture_write_file(LIBSSH_ED25519_TESTKEY,
                        torture_get_testkey(SSH_KEYTYPE_ED25519, 0,0));
+    torture_write_file(LIBSSH_ED25519_TESTKEY_PASSPHRASE,
+                       torture_get_testkey(SSH_KEYTYPE_ED25519, 0,0));
 
     torture_write_file(LIBSSH_ED25519_TESTKEY ".pub",
                        torture_get_testkey_pub(SSH_KEYTYPE_ED25519,0));
@@ -38,6 +42,8 @@ static int teardown(void **state) {
     (void) state; /* unused */
 
     unlink(LIBSSH_ED25519_TESTKEY);
+    unlink(LIBSSH_ED25519_TESTKEY_PASSPHRASE);
+    unlink(LIBSSH_ED25519_TESTKEY ".pub");
 
     return 0;
 }
@@ -274,6 +280,43 @@ static void torture_pki_ed25519_write_privkey(void **state)
 
     ssh_key_free(origkey);
     ssh_key_free(privkey);
+
+    /* Test with passphrase */
+    rc = ssh_pki_import_privkey_file(LIBSSH_ED25519_TESTKEY_PASSPHRASE,
+                                     torture_get_testkey_passphrase(),
+                                     NULL,
+                                     NULL,
+                                     &origkey);
+    assert_true(rc == 0);
+
+    unlink(LIBSSH_ED25519_TESTKEY_PASSPHRASE);
+    rc = ssh_pki_export_privkey_file(origkey,
+                                     torture_get_testkey_passphrase(),
+                                     NULL,
+                                     NULL,
+                                     LIBSSH_ED25519_TESTKEY_PASSPHRASE);
+    assert_true(rc == 0);
+
+    /* Test with invalid passphrase */
+    rc = ssh_pki_import_privkey_file(LIBSSH_ED25519_TESTKEY_PASSPHRASE,
+                                     "invalid secret",
+                                     NULL,
+                                     NULL,
+                                     &privkey);
+    assert_true(rc == SSH_ERROR);
+
+    rc = ssh_pki_import_privkey_file(LIBSSH_ED25519_TESTKEY_PASSPHRASE,
+                                     torture_get_testkey_passphrase(),
+                                     NULL,
+                                     NULL,
+                                     &privkey);
+    assert_true(rc == 0);
+
+    rc = ssh_key_cmp(origkey, privkey, SSH_KEY_CMP_PRIVATE);
+    assert_true(rc == 0);
+
+    ssh_key_free(origkey);
+    ssh_key_free(privkey);
 }
 
 static void torture_pki_ed25519_sign(void **state){