[PATCH 3/4] ui: deprecate "password" option for SPICE server

[Daniel P. Berrangé]

With the new "password-secret" option, there is no reason to use the old
inecure "password" option with -spice, so it can be deprecated.

Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>
---
 docs/system/deprecated.rst | 8 ++++++++
 qemu-options.hx            | 4 ++++
 ui/spice-core.c            | 4 ++++
 3 files changed, 16 insertions(+)

diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
index 2fcac7861e..57ff9f47cc 100644
--- a/docs/system/deprecated.rst
+++ b/docs/system/deprecated.rst
@@ -146,6 +146,14 @@ library enabled as a cryptography provider.
 Neither the ``nettle`` library, or the built-in cryptography provider are
 supported on FIPS enabled hosts.
 
+``-spice password=string`` (since 6.0)
+''''''''''''''''''''''''''''''''''''''
+
+This option is insecure because the SPICE password remains visible in
+the process listing. This is replaced by the new ``password-secret``
+option which lets the password be securely provided on the command
+line using a ``secret`` object instance.
+
 QEMU Machine Protocol (QMP) commands
 ------------------------------------
 
diff --git a/qemu-options.hx b/qemu-options.hx
index ff4ef3b708..4833bd59cf 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1926,6 +1926,10 @@ SRST
     ``password=<string>``
         Set the password you need to authenticate.
 
+        This option is deprecated and insecure because it leaves the
+        password visible in the process listing. Use ``password-secret``
+        instead.
+
     ``password-secret=<secret-id>``
         Set the ID of the ``secret`` object containing the password
         you need to authenticate.
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 353848b244..5e00e31457 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -685,6 +685,10 @@ static void qemu_spice_init(void)
         }
     } else {
         str = qemu_opt_get(opts, "password");
+        if (str) {
+            warn_report("'password' option is deprecated and insecure, "
+                        "use 'password-secret' instead");
+        }
         password = g_strdup(str);
     }
 
-- 
2.29.2