feat: document signing, add setting for the signing certificate & key…

…, too (fixes #4123)

The CA chain for the document signing was already a user setting & it
was exposed in the WOPI CheckFileInfo, but the actual signing
certificate & key was missing, so signing was not possible.

These are typically in a similar PEM format using just ASCII characters,
so providing a textarea where the user can paste them sounds like a good
fit.

Add the read/write of this setting and also expose it as part of the
private user info in WOPI CheckFileInfo.

With this, once all 3 are configured, it's possible to sign a document
in Nextcloud Office, using the Signature button on the Home tab of the
notebookbar.

Signed-off-by: Miklos Vajna <vmiklos@collabora.com>

css/admin.scss

@@ -27,6 +27,14 @@ input#zoteroAPIKeyField {
 	width: 300px;
 }
 
+textarea#documentSigningCertField {
+	width: 600px;
+}
+
+textarea#documentSigningKeyField {
+	width: 600px;
+}
+
 textarea#documentSigningCaField {
 	width: 600px;
 }

lib/Controller/SettingsController.php

@@ -237,6 +237,8 @@ public function updateWatermarkSettings($settings = []): JSONResponse {
 	 */
 	public function setPersonalSettings($templateFolder,
 		$zoteroAPIKeyInput,
+		$documentSigningCertInput,
+		$documentSigningKeyInput,
 		$documentSigningCaInput) {
 		$message = $this->l10n->t('Saved');
 		$status = 'success';
@@ -258,6 +260,22 @@ public function setPersonalSettings($templateFolder,
 			}
 		}
 
+		if ($documentSigningCertInput !== null) {
+			try {
+				$this->config->setUserValue($this->userId, 'richdocuments', 'documentSigningCert', $documentSigningCertInput);
+			} catch (PreConditionNotMetException $e) {
+				$message = $this->l10n->t('Error when saving');
+				$status = 'error';
+			}
+		}
+		if ($documentSigningKeyInput !== null) {
+			try {
+				$this->config->setUserValue($this->userId, 'richdocuments', 'documentSigningKey', $documentSigningKeyInput);
+			} catch (PreConditionNotMetException $e) {
+				$message = $this->l10n->t('Error when saving');
+				$status = 'error';
+			}
+		}
 		if ($documentSigningCaInput !== null) {
 			try {
 				$this->config->setUserValue($this->userId, 'richdocuments', 'documentSigningCa', $documentSigningCaInput);

lib/Controller/WopiController.php

@@ -167,6 +167,10 @@ public function checkFileInfo(string $fileId, string $access_token): JSONRespons
 		}
 		$enableDocumentSigning = $this->config->getAppValue(Application::APPNAME, 'documentSigningEnabled', 'yes') === 'yes';
 		if (!$isPublic && $enableDocumentSigning) {
+			$documentSigningCert = $this->config->getUserValue($wopi->getEditorUid(), 'richdocuments', 'documentSigningCert', '');
+			$response['UserPrivateInfo']['SignatureCert'] = $documentSigningCert;
+			$documentSigningKey = $this->config->getUserValue($wopi->getEditorUid(), 'richdocuments', 'documentSigningKey', '');
+			$response['UserPrivateInfo']['SignatureKey'] = $documentSigningKey;
 			$documentSigningCa = $this->config->getUserValue($wopi->getEditorUid(), 'richdocuments', 'documentSigningCa', '');
 			$response['UserPrivateInfo']['SignatureCa'] = $documentSigningCa;
 		}

lib/Settings/Personal.php

@@ -35,6 +35,8 @@ public function getForm() {
 			[
 				'templateFolder' => $this->config->getUserValue($this->userId, 'richdocuments', 'templateFolder', ''),
 				'hasDocumentSigningSupport' => $this->capabilitiesService->hasDocumentSigningSupport(),
+				'documentSigningCert' => $this->config->getUserValue($this->userId, 'richdocuments', 'documentSigningCert', ''),
+				'documentSigningKey' => $this->config->getUserValue($this->userId, 'richdocuments', 'documentSigningKey', ''),
 				'documentSigningCa' => $this->config->getUserValue($this->userId, 'richdocuments', 'documentSigningCa', ''),
 				'hasZoteroSupport' => $this->capabilitiesService->hasZoteroSupport(),
 				'zoteroAPIKey' => $this->config->getUserValue($this->userId, 'richdocuments', 'zoteroAPIKey', '')

src/personal.js

@@ -17,6 +17,12 @@ import { showError } from '@nextcloud/dialogs'
 		this.zoteroAPIKeySaveButton = document.getElementById('zoteroAPIKeySave')
 		this.zoteroAPIKeyRemoveButton = document.getElementById('zoteroAPIKeyRemove')
 
+		this.documentSigningCertInput = document.getElementById('documentSigningCertField')
+		this.documentSigningCertSaveButton = document.getElementById('documentSigningCertSave')
+		this.documentSigningCertRemoveButton = document.getElementById('documentSigningCertRemove')
+		this.documentSigningKeyInput = document.getElementById('documentSigningKeyField')
+		this.documentSigningKeySaveButton = document.getElementById('documentSigningKeySave')
+		this.documentSigningKeyRemoveButton = document.getElementById('documentSigningKeyRemove')
 		this.documentSigningCaInput = document.getElementById('documentSigningCaField')
 		this.documentSigningCaSaveButton = document.getElementById('documentSigningCaSave')
 		this.documentSigningCaRemoveButton = document.getElementById('documentSigningCaRemove')
@@ -36,10 +42,17 @@ import { showError } from '@nextcloud/dialogs'
 
 		this.zoteroAPIKeyRemoveButton.addEventListener('click', this.resetZoteroAPI.bind(this))
 
+		this.documentSigningCertSaveButton.addEventListener('click', function() {
+			self.updateDocumentSigningCert(self.documentSigningCertInput.value)
+		})
+		this.documentSigningCertRemoveButton.addEventListener('click', this.resetDocumentSigningCert.bind(this))
+		this.documentSigningKeySaveButton.addEventListener('click', function() {
+			self.updateDocumentSigningKey(self.documentSigningKeyInput.value)
+		})
+		this.documentSigningKeyRemoveButton.addEventListener('click', this.resetDocumentSigningKey.bind(this))
 		this.documentSigningCaSaveButton.addEventListener('click', function() {
 			self.updateDocumentSigningCa(self.documentSigningCaInput.value)
 		})
-
 		this.documentSigningCaRemoveButton.addEventListener('click', this.resetDocumentSigningCa.bind(this))
 	}
 
@@ -79,6 +92,42 @@ import { showError } from '@nextcloud/dialogs'
 		})
 	}
 
+	PersonalSettings.prototype.updateDocumentSigningCert = function(ca) {
+		const self = this
+		this._updateSetting({ documentSigningCertInput: ca }, function() {
+			self.documentSigningCertInput.value = ca
+		}, function() {
+			showError(t('richdocuments', 'Failed to update the document signing CA chain'))
+		})
+	}
+
+	PersonalSettings.prototype.resetDocumentSigningCert = function() {
+		const self = this
+		this._updateSetting({ documentSigningCertInput: '' }, function() {
+			self.documentSigningCertInput.value = ''
+		}, function() {
+
+		})
+	}
+
+	PersonalSettings.prototype.updateDocumentSigningKey = function(ca) {
+		const self = this
+		this._updateSetting({ documentSigningKeyInput: ca }, function() {
+			self.documentSigningKeyInput.value = ca
+		}, function() {
+			showError(t('richdocuments', 'Failed to update the document signing CA chain'))
+		})
+	}
+
+	PersonalSettings.prototype.resetDocumentSigningKey = function() {
+		const self = this
+		this._updateSetting({ documentSigningKeyInput: '' }, function() {
+			self.documentSigningKeyInput.value = ''
+		}, function() {
+
+		})
+	}
+
 	PersonalSettings.prototype.updateDocumentSigningCa = function(ca) {
 		const self = this
 		this._updateSetting({ documentSigningCaInput: ca }, function() {

templates/personal.php

@@ -33,6 +33,16 @@
 	<p><strong><?php p($l->t('Document signing')) ?></strong></p>
 	<?php if ($_['hasDocumentSigningSupport']) { ?>
 		<div class="input-wrapper">
+			<p><label for="documentSigningCertField"><?php p($l->t('Enter document signing cert (in PEM format)')); ?></label><br />
+				<textarea type="text" name="documentSigningCertField" id="documentSigningCertField"><?php p($_['documentSigningCert']); ?></textarea><br />
+				<button id="documentSigningCertSave"><span title="<?php p($l->t('Save document signing cert')); ?>" data-toggle="tooltip">Save</span></button>
+				<button id="documentSigningCertRemove"><span  class="icon-delete" title="<?php p($l->t('Remove document signing cert')); ?>" data-toggle="tooltip"></span></button>
+			</p>
+			<p><label for="documentSigningKeyField"><?php p($l->t('Enter document signing key')); ?></label><br />
+				<textarea type="text" name="documentSigningKeyField" id="documentSigningKeyField"><?php p($_['documentSigningKey']); ?></textarea><br />
+				<button id="documentSigningKeySave"><span title="<?php p($l->t('Save document signing key')); ?>" data-toggle="tooltip">Save</span></button>
+				<button id="documentSigningKeyRemove"><span  class="icon-delete" title="<?php p($l->t('Remove document signing key')); ?>" data-toggle="tooltip"></span></button>
+			</p>
 			<p><label for="documentSigningCaField"><?php p($l->t('Enter document signing CA chain')); ?></label><br />
 				<textarea type="text" name="documentSigningCaField" id="documentSigningCaField"><?php p($_['documentSigningCa']); ?></textarea><br />
 				<button id="documentSigningCaSave"><span title="<?php p($l->t('Save document signing CA chain')); ?>" data-toggle="tooltip">Save</span></button>