Add OpenConfig user provider

internal/provider/openconfig/user.go

@@ -0,0 +1,78 @@
+// SPDX-FileCopyrightText: 2026 SAP SE or an SAP affiliate company and IronCore contributors
+// SPDX-License-Identifier: Apache-2.0
+
+package openconfig
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/ironcore-dev/network-operator/internal/apistatus"
+	"github.com/ironcore-dev/network-operator/internal/provider"
+	"github.com/ironcore-dev/network-operator/internal/transport/gnmiext"
+)
+
+var _ provider.UserProvider = (*Provider)(nil)
+
+func (p *Provider) EnsureUser(ctx context.Context, req *provider.EnsureUserRequest) error {
+	if len(req.Roles) > 1 {
+		return apistatus.NewUnsupportedFieldError(apistatus.FieldViolation{
+			Field:       "spec.roles",
+			Description: "the OpenConfig user model supports only a single role",
+		})
+	}
+	u := &User{
+		Username: req.Username,
+		Config: &UserConfig{
+			Username: req.Username,
+			Role:     req.Roles[0],
+			Password: req.Password,
+			SSHKey:   req.SSHKey,
+		},
+	}
+	return p.client.Patch(ctx, u)
+}
+
+func (p *Provider) DeleteUser(ctx context.Context, req *provider.DeleteUserRequest) error {
+	return p.client.Delete(ctx, &User{Username: req.Username})
+}
+
+// Compile-time assertion.
+var _ gnmiext.DataElement = (*User)(nil)
+
+// User targets an OpenConfig user entry.
+type User struct {
+	Username string      `json:"-"`
+	Config   *UserConfig `json:"config,omitempty"`
+}
+
+func (u *User) XPath() string {
+	return fmt.Sprintf("openconfig-system:system/aaa/authentication/users/user[username=%s]", u.Username)
+}
+
+// UserConfig holds the user config container leaves.
+// Password is write-only — the device returns a hashed value that would never match
+// the plaintext, so we exclude it from unmarshal to avoid perpetual diffs.
+type UserConfig struct {
+	Username string `json:"username"`
+	Role     string `json:"role,omitempty"`
+	Password string `json:"password,omitempty"`
+	SSHKey   string `json:"ssh-key,omitempty"`
+}
+
+func (c *UserConfig) UnmarshalJSON(data []byte) error {
+	type alias struct {
+		Username string `json:"username"`
+		Role     string `json:"role,omitempty"`
+		SSHKey   string `json:"ssh-key,omitempty"`
+	}
+	var a alias
+	if err := json.Unmarshal(data, &a); err != nil {
+		return err
+	}
+	c.Username = a.Username
+	c.Role = a.Role
+	c.SSHKey = a.SSHKey
+	return nil
+}

test/gnmi/testdata/openconfig/user.txtar

@@ -0,0 +1,69 @@
+# User with password, role and ssh-key
+-- secrets/user-password --
+apiVersion: v1
+kind: Secret
+metadata:
+  name: user-password
+  namespace: default
+type: Opaque
+stringData:
+  password: Test1234!
+
+-- secrets/user-ssh-key --
+apiVersion: v1
+kind: Secret
+metadata:
+  name: user-ssh-key
+  namespace: default
+type: Opaque
+stringData:
+  ssh-publickey: "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAAQQDSGgsAKZn/hxPMKyfwKboiOEeuL9bTqW79QfEQ8h0kpGhkFJJEWR1e3BvXpdT9KYQOaKQnNw32atULweSQQNGh6 IronCore Test"
+
+-- users/user --
+apiVersion: networking.metal.ironcore.dev/v1alpha1
+kind: User
+metadata:
+  name: user
+  namespace: default
+spec:
+  deviceRef:
+    name: device
+  username: testplan
+  password:
+    secretKeyRef:
+      name: user-password
+      key: password
+  roles:
+    - name: superuser
+  sshPublicKey:
+    secretKeyRef:
+      name: user-ssh-key
+      key: ssh-publickey
+
+-- state/preload --
+{}
+
+-- state/expect --
+{
+  "openconfig-system:system": {
+    "aaa": {
+      "authentication": {
+        "users": {
+          "user": [
+            {
+              "config": {
+                "role": "superuser",
+                "ssh-key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAAQQDSGgsAKZn/hxPMKyfwKboiOEeuL9bTqW79QfEQ8h0kpGhkFJJEWR1e3BvXpdT9KYQOaKQnNw32atULweSQQNGh6 IronCore Test",
+                "username": "testplan"
+              },
+              "username": "testplan"
+            }
+          ]
+        }
+      }
+    }
+  }
+}
+
+-- state/delete --
+{}