[PATCH 14/15] virNetLibsshAuthenticatePassword: Use virAuthAskPassword instead of virAuthGetPasswordPath

[Peter Krempa]

virAuthGetPasswordPath can return the same password over and over if
it's configured in the config. We rather want to try that only the first
time and then ask the user instead.

Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
 src/rpc/virnetlibsshsession.c | 32 ++++++++++++++++++++++++--------
 1 file changed, 24 insertions(+), 8 deletions(-)

diff --git a/src/rpc/virnetlibsshsession.c b/src/rpc/virnetlibsshsession.c
index ecee30e5df..7da7a90985 100644
--- a/src/rpc/virnetlibsshsession.c
+++ b/src/rpc/virnetlibsshsession.c
@@ -500,6 +500,7 @@ virNetLibsshAuthenticatePrivkey(virNetLibsshSession *sess,
 static int
 virNetLibsshAuthenticatePassword(virNetLibsshSession *sess)
 {
+    g_autofree char *password = NULL;
     const char *errmsg;
     int rc = SSH_AUTH_ERROR;

@@ -513,19 +514,34 @@ virNetLibsshAuthenticatePassword(virNetLibsshSession *sess)
         return SSH_AUTH_ERROR;
     }

+    /* first try to get password from config */
+    if (virAuthGetCredential("ssh", sess->hostname, "password", sess->authPath,
+                             &password) < 0)
+        return SSH_AUTH_ERROR;
+
+    if (password) {
+        rc = ssh_userauth_password(sess->session, NULL, password);
+        virSecureEraseString(password);
+
+        if (rc == 0)
+            return SSH_AUTH_SUCCESS;
+        else if (rc != SSH_AUTH_DENIED)
+            goto error;
+    }
+
     /* Try the authenticating the set amount of times. The server breaks the
      * connection if maximum number of bad auth tries is exceeded */
     while (true) {
-        g_autofree char *password = NULL;
+        g_autoptr(virConnectCredential) cred = NULL;
+        g_autofree char *prompt = NULL;
+
+        prompt = g_strdup_printf(_("Enter %s's password for %s"),
+                                 sess->username, sess->hostname);

-        if (!(password = virAuthGetPasswordPath(sess->authPath, sess->cred,
-                                                "ssh", sess->username,
-                                                sess->hostname)))
+        if (!(cred = virAuthAskCredential(sess->cred, prompt, false)))
             return SSH_AUTH_ERROR;

-        /* tunnelled password authentication */
-        rc = ssh_userauth_password(sess->session, NULL, password);
-        virSecureEraseString(password);
+        rc = ssh_userauth_password(sess->session, NULL, cred->result);

         if (rc == 0)
             return SSH_AUTH_SUCCESS;
@@ -533,7 +549,7 @@ virNetLibsshAuthenticatePassword(virNetLibsshSession *sess)
             break;
     }

-    /* error path */
+ error:
     errmsg = ssh_get_error(sess->session);
     virReportError(VIR_ERR_AUTH_FAILED,
                    _("authentication failed: %s"), errmsg);
-- 
2.38.1