password change UI (#543) (#548)

frontend/src/lang/translations/de.json

@@ -221,6 +221,16 @@
       "button-delete-text": "Passkey löschen. Sie können sich anschließend nicht mehr mit diesem Passkey anmelden.",
       "button-register-title": "Passkey registrieren",
       "button-register-text": "Einen neuen Passkey registrieren, um Ihr Konto zu sichern."
+    },
+    "password": {
+      "headline": "Passwort-Einstellungen",
+      "abstract": "Hier können Sie Ihr Passwort ändern.",
+      "current-label": "Aktuelles Passwort",
+      "new-label": "Neues Passwort",
+      "new-confirm-label": "Neues Passwort bestätigen",
+      "change-button-text": "Passwort ändern",
+      "invalid-confirm-label": "Passwörter stimmen nicht überein",
+      "weak-label": "Passwort ist zu schwach"
     }
   },
   "audit": {

frontend/src/lang/translations/en.json

@@ -221,6 +221,16 @@
       "button-delete-text": "Delete the passkey. You will not be able to log in with this passkey anymore.",
       "button-register-title": "Register Passkey",
       "button-register-text": "Register a new Passkey to secure your account."
+    },
+    "password": {
+      "headline": "Password Settings",
+      "abstract": "Here you can change your password.",
+      "current-label": "Current Password",
+      "new-label": "New Password",
+      "new-confirm-label": "Confirm New Password",
+      "change-button-text": "Change Password",
+      "invalid-confirm-label": "Passwords do not match",
+      "weak-label": "Password is too weak"
     }
   },
   "audit": {

frontend/src/stores/profile.js

@@ -151,6 +151,17 @@ export const profileStore = defineStore('profile', {
             })
           })
     },
+    async changePassword(formData) {
+      this.fetching = true
+      let currentUser = authStore().user.Identifier
+      return apiWrapper.post(`${baseUrl}/${base64_url_encode(currentUser)}/change-password`, formData)
+          .then(this.fetching = false)
+          .catch(error => {
+            this.fetching = false;
+            console.log("Failed to change password for ", currentUser, ": ", error);
+            throw new Error(error);
+          });
+    },
     async LoadPeers() {
       this.fetching = true
       let currentUser = authStore().user.Identifier

frontend/src/views/SettingsView.vue

@@ -1,8 +1,9 @@
 <script setup>
-import {onMounted, ref} from "vue";
+import {computed, onMounted, ref} from "vue";
 import { profileStore } from "@/stores/profile";
 import { settingsStore } from "@/stores/settings";
 import { authStore } from "../stores/auth";
+import {notify} from "@kyvg/vue3-notification";
 
 const profile = profileStore()
 const settings = settingsStore()
@@ -34,6 +35,45 @@ async function saveRename(credential) {
     console.error("Failed to rename credential:", error);
   }
 }
+
+const pwFormData = ref({
+  OldPassword: '',
+  Password: '',
+  PasswordRepeat: '',
+})
+
+const passwordWeak = computed(() => {
+  return pwFormData.value.Password && pwFormData.value.Password.length > 0 && pwFormData.value.Password.length < settings.Setting('MinPasswordLength')
+})
+
+const passwordChangeAllowed = computed(() => {
+  return pwFormData.value.Password && pwFormData.value.Password.length >= settings.Setting('MinPasswordLength') &&
+      pwFormData.value.Password === pwFormData.value.PasswordRepeat &&
+      pwFormData.value.OldPassword && pwFormData.value.OldPassword.length > 0 && pwFormData.value.OldPassword !== pwFormData.value.Password;
+})
+
+const updatePassword = async () => {
+  try {
+    await profile.changePassword(pwFormData.value);
+
+    pwFormData.value.OldPassword = '';
+    pwFormData.value.Password = '';
+    pwFormData.value.PasswordRepeat = '';
+    notify({
+      title: "Password changed!",
+      text: "Your password has been changed successfully.",
+      type: 'success',
+    });
+  } catch (e) {
+    notify({
+      title: "Failed to update password!",
+      text: e.toString(),
+      type: 'error',
+    })
+  }
+}
+
+
 </script>
 
 <template>
@@ -43,54 +83,47 @@ async function saveRename(credential) {
 
   <p class="lead">{{ $t('settings.abstract') }}</p>
 
-  <div v-if="auth.IsAdmin || !settings.Setting('ApiAdminOnly')">
+  <div class="card border-secondary p-5 mt-5" v-if="profile.user.Source === 'db'">
-    <div class="card border-secondary p-5" v-if="profile.user.ApiToken">
+    <h2 class="display-7">{{ $t('settings.password.headline') }}</h2>
-      <h2 class="display-7">{{ $t('settings.api.headline') }}</h2>
+    <p class="lead">{{ $t('settings.password.abstract') }}</p>
-      <p class="lead">{{ $t('settings.api.abstract') }}</p>
     <hr class="my-4">
-      <p>{{ $t('settings.api.active-description') }}</p>
+
     <div class="row">
       <div class="col-6">
         <div class="form-group">
-            <label class="form-label mt-4">{{ $t('settings.api.user-label') }}</label>
+          <label class="form-label mt-4" for="oldpw">{{ $t('settings.password.current-label') }}</label>
-            <input v-model="profile.user.Identifier" class="form-control" :placeholder="$t('settings.api.user-placeholder')" type="text" readonly>
+          <input id="oldpw" v-model="pwFormData.OldPassword" class="form-control" :class="{ 'is-invalid': pwFormData.Password && !pwFormData.OldPassword }" type="password">
+        </div>
+      </div>
+      <div class="col-6">
+      </div>
+    </div>
+    <div class="row">
+      <div class="col-6">
+        <div class="form-group has-success">
+          <label class="form-label mt-4" for="newpw">{{ $t('settings.password.new-label') }}</label>
+          <input id="newpw" v-model="pwFormData.Password" class="form-control" :class="{ 'is-invalid': passwordWeak,  'is-valid': pwFormData.Password !== '' && !passwordWeak }" type="password">
+          <div class="invalid-feedback" v-if="passwordWeak">{{ $t('settings.password.weak-label') }}</div>
         </div>
       </div>
       <div class="col-6">
         <div class="form-group">
-            <label class="form-label mt-4">{{ $t('settings.api.token-label') }}</label>
+          <label class="form-label mt-4" for="confirmnewpw">{{ $t('settings.password.new-confirm-label') }}</label>
-            <input v-model="profile.user.ApiToken" class="form-control" :placeholder="$t('settings.api.token-placeholder')" type="text" readonly>
+          <input id="confirmnewpw" v-model="pwFormData.PasswordRepeat" class="form-control" :class="{ 'is-invalid': pwFormData.PasswordRepeat !== ''&& pwFormData.Password !== pwFormData.PasswordRepeat,  'is-valid': pwFormData.PasswordRepeat !== '' && pwFormData.Password === pwFormData.PasswordRepeat && !passwordWeak }" type="password">
-          </div>
+          <div class="invalid-feedback" v-if="pwFormData.PasswordRepeat !== ''&& pwFormData.Password !== pwFormData.PasswordRepeat">{{ $t('settings.password.invalid-confirm-label') }}</div>
-        </div>
-      </div>
-      <div class="row">
-        <div class="col-12">
-          <div class="form-group">
-            <p class="form-label mt-4">{{ $t('settings.api.token-created-label') }} {{profile.user.ApiTokenCreated}}</p>
         </div>
       </div>
     </div>
     <div class="row mt-5">
       <div class="col-6">
-          <button class="btn btn-primary" :title="$t('settings.api.button-disable-title')" @click.prevent="profile.disableApi()" :disabled="profile.isFetching">
+        <button class="btn btn-primary" :title="$t('settings.api.button-disable-title')" @click.prevent="updatePassword" :disabled="profile.isFetching || !passwordChangeAllowed">
-            <i class="fa-solid fa-minus-circle"></i> {{ $t('settings.api.button-disable-text') }}
+          <i class="fa-solid fa-floppy-disk"></i> {{ $t('settings.password.change-button-text') }}
         </button>
       </div>
       <div class="col-6">
-          <a href="/api/v1/doc.html" target="_blank" :alt="$t('settings.api.api-link')">{{ $t('settings.api.api-link') }}</a>
       </div>
     </div>
   </div>
-    <div class="card border-secondary p-5" v-else>
-      <h2 class="display-7">{{ $t('settings.api.headline') }}</h2>
-      <p class="lead">{{ $t('settings.api.abstract') }}</p>
-      <hr class="my-4">
-      <p>{{ $t('settings.api.inactive-description') }}</p>
-      <button class="btn btn-primary" :title="$t('settings.api.button-enable-title')" @click.prevent="profile.enableApi()" :disabled="profile.isFetching">
-        <i class="fa-solid fa-plus-circle"></i> {{ $t('settings.api.button-enable-text') }}
-      </button>
-    </div>
-  </div>
 
   <div class="card border-secondary p-5 mt-5" v-if="settings.Setting('WebAuthnEnabled')">
     <h2 class="display-7">{{ $t('settings.webauthn.headline') }}</h2>
@@ -173,4 +206,53 @@ async function saveRename(credential) {
     </div>
 
   </div>
+
+  <div class="mt-5" v-if="auth.IsAdmin || !settings.Setting('ApiAdminOnly')">
+    <div class="card border-secondary p-5" v-if="profile.user.ApiToken">
+      <h2 class="display-7">{{ $t('settings.api.headline') }}</h2>
+      <p class="lead">{{ $t('settings.api.abstract') }}</p>
+      <hr class="my-4">
+      <p>{{ $t('settings.api.active-description') }}</p>
+      <div class="row">
+        <div class="col-6">
+          <div class="form-group">
+            <label class="form-label mt-4">{{ $t('settings.api.user-label') }}</label>
+            <input v-model="profile.user.Identifier" class="form-control" :placeholder="$t('settings.api.user-placeholder')" type="text" readonly>
+          </div>
+        </div>
+        <div class="col-6">
+          <div class="form-group">
+            <label class="form-label mt-4">{{ $t('settings.api.token-label') }}</label>
+            <input v-model="profile.user.ApiToken" class="form-control" :placeholder="$t('settings.api.token-placeholder')" type="text" readonly>
+          </div>
+        </div>
+      </div>
+      <div class="row">
+        <div class="col-12">
+          <div class="form-group">
+            <p class="form-label mt-4">{{ $t('settings.api.token-created-label') }} {{profile.user.ApiTokenCreated}}</p>
+          </div>
+        </div>
+      </div>
+      <div class="row mt-5">
+        <div class="col-6">
+          <button class="btn btn-primary" :title="$t('settings.api.button-disable-title')" @click.prevent="profile.disableApi()" :disabled="profile.isFetching">
+            <i class="fa-solid fa-minus-circle"></i> {{ $t('settings.api.button-disable-text') }}
+          </button>
+        </div>
+        <div class="col-6">
+          <a href="/api/v1/doc.html" target="_blank" :alt="$t('settings.api.api-link')">{{ $t('settings.api.api-link') }}</a>
+        </div>
+      </div>
+    </div>
+    <div class="card border-secondary p-5" v-else>
+      <h2 class="display-7">{{ $t('settings.api.headline') }}</h2>
+      <p class="lead">{{ $t('settings.api.abstract') }}</p>
+      <hr class="my-4">
+      <p>{{ $t('settings.api.inactive-description') }}</p>
+      <button class="btn btn-primary" :title="$t('settings.api.button-enable-title')" @click.prevent="profile.enableApi()" :disabled="profile.isFetching">
+        <i class="fa-solid fa-plus-circle"></i> {{ $t('settings.api.button-enable-text') }}
+      </button>
+    </div>
+  </div>
 </template>

internal/app/api/core/assets/doc/v0_swagger.json

@@ -1550,6 +1550,38 @@
                 }
             }
         },
+        "/user/{id}/change-password": {
+            "post": {
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "Users"
+                ],
+                "summary": "Change the password for the given user.",
+                "operationId": "users_handleChangePasswordPost",
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "$ref": "#/definitions/model.User"
+                        }
+                    },
+                    "400": {
+                        "description": "Bad Request",
+                        "schema": {
+                            "$ref": "#/definitions/model.Error"
+                        }
+                    },
+                    "500": {
+                        "description": "Internal Server Error",
+                        "schema": {
+                            "$ref": "#/definitions/model.Error"
+                        }
+                    }
+                }
+            }
+        },
         "/user/{id}/interfaces": {
             "get": {
                 "produces": [
@@ -2159,6 +2191,10 @@
                         }
                     ]
                 },
+                "UserDisplayName": {
+                    "description": "the owner display name",
+                    "type": "string"
+                },
                 "UserIdentifier": {
                     "description": "the owner",
                     "type": "string"

internal/app/api/core/assets/doc/v0_swagger.yaml

@@ -322,6 +322,9 @@ definitions:
         allOf:
         - $ref: '#/definitions/model.ConfigOption-string'
         description: the routing table
+      UserDisplayName:
+        description: the owner display name
+        type: string
       UserIdentifier:
         description: the owner
         type: string
@@ -1442,6 +1445,27 @@ paths:
       summary: Enable the REST API for the given user.
       tags:
       - Users
+  /user/{id}/change-password:
+    post:
+      operationId: users_handleChangePasswordPost
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/model.User'
+        "400":
+          description: Bad Request
+          schema:
+            $ref: '#/definitions/model.Error'
+        "500":
+          description: Internal Server Error
+          schema:
+            $ref: '#/definitions/model.Error'
+      summary: Change the password for the given user.
+      tags:
+      - Users
   /user/{id}/interfaces:
     get:
       operationId: users_handleInterfacesGet

internal/app/api/core/assets/doc/v1_swagger.json

@@ -17,11 +17,6 @@
     "paths": {
         "/interface/all": {
             "get": {
-                "security": [
-                    {
-                        "BasicAuth": []
-                    }
-                ],
                 "produces": [
                     "application/json"
                 ],
@@ -52,16 +47,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/interface/by-id/{id}": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/interface/by-id/{id}": {
+            "get": {
                 "produces": [
                     "application/json"
                 ],
@@ -110,14 +105,14 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
                 },
-            "put": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            },
+            "put": {
                 "description": "This endpoint updates an existing interface with the provided data. All required fields must be filled (e.g. name, private key, public key, ...).",
                 "produces": [
                     "application/json"
@@ -182,14 +177,14 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
                 },
-            "delete": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            },
+            "delete": {
                 "produces": [
                     "application/json"
                 ],
@@ -241,16 +236,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/interface/new": {
-            "post": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/interface/new": {
+            "post": {
                 "description": "This endpoint creates a new interface with the provided data. All required fields must be filled (e.g. name, private key, public key, ...).",
                 "produces": [
                     "application/json"
@@ -308,16 +303,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/interface/prepare": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/interface/prepare": {
+            "get": {
                 "description": "This endpoint returns a new interface with default values (fresh key pair, valid name, new IP address pool, ...).",
                 "produces": [
                     "application/json"
@@ -352,16 +347,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/metrics/by-interface/{id}": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/metrics/by-interface/{id}": {
+            "get": {
                 "produces": [
                     "application/json"
                 ],
@@ -410,16 +405,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/metrics/by-peer/{id}": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/metrics/by-peer/{id}": {
+            "get": {
                 "produces": [
                     "application/json"
                 ],
@@ -468,16 +463,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/metrics/by-user/{id}": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/metrics/by-user/{id}": {
+            "get": {
                 "produces": [
                     "application/json"
                 ],
@@ -526,16 +521,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/peer/by-id/{id}": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/peer/by-id/{id}": {
+            "get": {
                 "description": "Normal users can only access their own records. Admins can access all records.",
                 "produces": [
                     "application/json"
@@ -585,14 +580,14 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
                 },
-            "put": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            },
+            "put": {
                 "description": "Only admins can update existing records. The peer record must contain all required fields (e.g., public key, allowed IPs).",
                 "produces": [
                     "application/json"
@@ -657,14 +652,14 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
                 },
-            "delete": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            },
+            "delete": {
                 "produces": [
                     "application/json"
                 ],
@@ -716,16 +711,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/peer/by-interface/{id}": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/peer/by-interface/{id}": {
+            "get": {
                 "produces": [
                     "application/json"
                 ],
@@ -765,16 +760,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/peer/by-user/{id}": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/peer/by-user/{id}": {
+            "get": {
                 "description": "Normal users can only access their own records. Admins can access all records.",
                 "produces": [
                     "application/json"
@@ -815,16 +810,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/peer/new": {
-            "post": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/peer/new": {
+            "post": {
                 "description": "Only admins can create new records. The peer record must contain all required fields (e.g., public key, allowed IPs).",
                 "produces": [
                     "application/json"
@@ -882,16 +877,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/peer/prepare/{id}": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/peer/prepare/{id}": {
+            "get": {
                 "description": "This endpoint is used to prepare a new peer record. The returned data contains a fresh key pair and valid ip address.",
                 "produces": [
                     "application/json"
@@ -947,16 +942,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/provisioning/data/peer-config": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/provisioning/data/peer-config": {
+            "get": {
                 "description": "Normal users can only access their own record. Admins can access all records.",
                 "produces": [
                     "text/plain",
@@ -1013,16 +1008,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/provisioning/data/peer-qr": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/provisioning/data/peer-qr": {
+            "get": {
                 "description": "Normal users can only access their own record. Admins can access all records.",
                 "produces": [
                     "image/png",
@@ -1079,16 +1074,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/provisioning/data/user-info": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/provisioning/data/user-info": {
+            "get": {
                 "description": "Normal users can only access their own record. Admins can access all records.",
                 "produces": [
                     "application/json"
@@ -1149,16 +1144,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/provisioning/new-peer": {
-            "post": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/provisioning/new-peer": {
+            "post": {
                 "description": "Normal users can only create new peers if self provisioning is allowed. Admins can always add new peers.",
                 "produces": [
                     "application/json"
@@ -1216,16 +1211,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/user/all": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/user/all": {
+            "get": {
                 "produces": [
                     "application/json"
                 ],
@@ -1256,16 +1251,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/user/by-id/{id}": {
-            "get": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/user/by-id/{id}": {
+            "get": {
                 "description": "Normal users can only access their own record. Admins can access all records.",
                 "produces": [
                     "application/json"
@@ -1315,14 +1310,14 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
                 },
-            "put": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            },
+            "put": {
                 "description": "Only admins can update existing records.",
                 "produces": [
                     "application/json"
@@ -1387,14 +1382,14 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
                 },
-            "delete": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            },
+            "delete": {
                 "produces": [
                     "application/json"
                 ],
@@ -1446,16 +1441,16 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
-                }
-            }
                 },
-        "/user/new": {
-            "post": {
                 "security": [
                     {
                         "BasicAuth": []
                     }
-                ],
+                ]
+            }
+        },
+        "/user/new": {
+            "post": {
                 "description": "Only admins can create new records.",
                 "produces": [
                     "application/json"
@@ -1513,7 +1508,12 @@
                             "$ref": "#/definitions/models.Error"
                         }
                     }
+                },
+                "security": [
+                    {
+                        "BasicAuth": []
                     }
+                ]
             }
         }
     },

internal/app/api/v0/backend/user_service.go

@@ -2,6 +2,8 @@ package backend
 
 import (
 	"context"
+	"fmt"
+	"strings"
 
 	"github.com/h44z/wg-portal/internal/config"
 	"github.com/h44z/wg-portal/internal/domain"
@@ -70,6 +72,44 @@ func (u UserService) DeactivateApi(ctx context.Context, id domain.UserIdentifier
 	return u.users.DeactivateApi(ctx, id)
 }
 
+func (u UserService) ChangePassword(ctx context.Context, id domain.UserIdentifier, oldPassword, newPassword string) (*domain.User, error) {
+	oldPassword = strings.TrimSpace(oldPassword)
+	newPassword = strings.TrimSpace(newPassword)
+
+	if newPassword == "" {
+		return nil, fmt.Errorf("new password must not be empty")
+	}
+
+	// ensure that the new password is different from the old one
+	if oldPassword == newPassword {
+		return nil, fmt.Errorf("new password must be different from the old one")
+	}
+
+	user, err := u.users.GetUser(ctx, id)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get user: %w", err)
+	}
+
+	// ensure that the user uses the database backend; otherwise we can't change the password
+	if user.Source != domain.UserSourceDatabase {
+		return nil, fmt.Errorf("user source %s does not support password changes", user.Source)
+	}
+
+	// validate old password
+	if user.CheckPassword(oldPassword) != nil {
+		return nil, fmt.Errorf("current password is invalid")
+	}
+
+	user.Password = domain.PrivateString(newPassword)
+
+	// ensure that the new password is strong enough
+	if err := user.HasWeakPassword(u.cfg.Auth.MinPasswordLength); err != nil {
+		return nil, err
+	}
+
+	return u.users.UpdateUser(ctx, user)
+}
+
 func (u UserService) GetUserPeers(ctx context.Context, id domain.UserIdentifier) ([]domain.Peer, error) {
 	return u.wg.GetUserPeers(ctx, id)
 }

internal/app/api/v0/handlers/endpoint_users.go

@@ -28,6 +28,8 @@ type UserService interface {
 	ActivateApi(ctx context.Context, id domain.UserIdentifier) (*domain.User, error)
 	// DeactivateApi disables the API for the user with the given id.
 	DeactivateApi(ctx context.Context, id domain.UserIdentifier) (*domain.User, error)
+	// ChangePassword changes the password for the user with the given id.
+	ChangePassword(ctx context.Context, id domain.UserIdentifier, oldPassword, newPassword string) (*domain.User, error)
 	// GetUserPeers returns all peers for the given user.
 	GetUserPeers(ctx context.Context, id domain.UserIdentifier) ([]domain.Peer, error)
 	// GetUserPeerStats returns all peer stats for the given user.
@@ -75,6 +77,7 @@ func (e UserEndpoint) RegisterRoutes(g *routegroup.Bundle) {
 	apiGroup.With(e.authenticator.UserIdMatch("id")).HandleFunc("GET /{id}/interfaces", e.handleInterfacesGet())
 	apiGroup.With(e.authenticator.UserIdMatch("id")).HandleFunc("POST /{id}/api/enable", e.handleApiEnablePost())
 	apiGroup.With(e.authenticator.UserIdMatch("id")).HandleFunc("POST /{id}/api/disable", e.handleApiDisablePost())
+	apiGroup.With(e.authenticator.UserIdMatch("id")).HandleFunc("POST /{id}/change-password", e.handleChangePasswordPost())
 }
 
 // handleAllGet returns a gorm Handler function.
@@ -391,3 +394,68 @@ func (e UserEndpoint) handleApiDisablePost() http.HandlerFunc {
 		respond.JSON(w, http.StatusOK, model.NewUser(user, false))
 	}
 }
+
+// handleChangePasswordPost returns a gorm Handler function.
+//
+// @ID users_handleChangePasswordPost
+// @Tags Users
+// @Summary Change the password for the given user.
+// @Produce json
+// @Success 200 {object} model.User
+// @Failure 400 {object} model.Error
+// @Failure 500 {object} model.Error
+// @Router /user/{id}/change-password [post]
+func (e UserEndpoint) handleChangePasswordPost() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		userId := Base64UrlDecode(request.Path(r, "id"))
+		if userId == "" {
+			respond.JSON(w, http.StatusBadRequest,
+				model.Error{Code: http.StatusInternalServerError, Message: "missing id parameter"})
+			return
+		}
+
+		var passwordData struct {
+			OldPassword    string `json:"OldPassword"`
+			Password       string `json:"Password"`
+			PasswordRepeat string `json:"PasswordRepeat"`
+		}
+		if err := request.BodyJson(r, &passwordData); err != nil {
+			respond.JSON(w, http.StatusBadRequest, model.Error{Code: http.StatusBadRequest, Message: err.Error()})
+			return
+		}
+
+		if passwordData.OldPassword == "" {
+			respond.JSON(w, http.StatusBadRequest,
+				model.Error{Code: http.StatusBadRequest, Message: "old password missing"})
+			return
+		}
+
+		if passwordData.Password == "" {
+			respond.JSON(w, http.StatusBadRequest,
+				model.Error{Code: http.StatusBadRequest, Message: "new password missing"})
+			return
+		}
+
+		if passwordData.OldPassword == passwordData.Password {
+			respond.JSON(w, http.StatusBadRequest,
+				model.Error{Code: http.StatusBadRequest, Message: "password did not change"})
+			return
+		}
+
+		if passwordData.Password != passwordData.PasswordRepeat {
+			respond.JSON(w, http.StatusBadRequest,
+				model.Error{Code: http.StatusBadRequest, Message: "password mismatch"})
+			return
+		}
+
+		user, err := e.userService.ChangePassword(r.Context(), domain.UserIdentifier(userId),
+			passwordData.OldPassword, passwordData.Password)
+		if err != nil {
+			respond.JSON(w, http.StatusInternalServerError,
+				model.Error{Code: http.StatusInternalServerError, Message: err.Error()})
+			return
+		}
+
+		respond.JSON(w, http.StatusOK, model.NewUser(user, false))
+	}
+}