add sftp support

README.md

@@ -103,9 +103,10 @@ Now, when adding a new volume in the Ironmount web interface, you can select "Di
 A repository is where your backups will be securely stored encrypted. Ironmount supports multiple storage backends for your backup repositories:
 
 - **Local directories** - Store backups on local disk at `/var/lib/ironmount/repositories/<repository-name>`
-- **S3-compatible storage** - Amazon S3, MinIO, Wasabi, DigitalOcean Spaces, etc.
+- **S3-compatible storage** - Amazon S3, MinIO, Wasabi, DigitalOcean Spaces, Cloudflare R2, etc.
 - **Google Cloud Storage** - Google's cloud storage service
 - **Azure Blob Storage** - Microsoft Azure storage
+- **SFTP** - Secure File Transfer Protocol 
 - **rclone remotes** - 40+ cloud storage providers via rclone (see below)
 
 Repositories are optimized for storage efficiency and data integrity, leveraging Restic's deduplication and encryption features.

app/client/components/create-repository-form.tsx

@@ -42,6 +42,7 @@ const defaultValuesForType = {
 	azure: { backend: "azure" as const, compressionMode: "auto" as const },
 	rclone: { backend: "rclone" as const, compressionMode: "auto" as const },
 	rest: { backend: "rest" as const, compressionMode: "auto" as const },
+	sftp: { backend: "sftp" as const, compressionMode: "auto" as const, port: 22 },
 };
 
 export const CreateRepositoryForm = ({
@@ -128,6 +129,7 @@ export const CreateRepositoryForm = ({
 									<SelectItem value="gcs">Google Cloud Storage</SelectItem>
 									<SelectItem value="azure">Azure Blob Storage</SelectItem>
 									<SelectItem value="rest">REST Server</SelectItem>
+									<SelectItem value="sftp">SFTP</SelectItem>
 									<Tooltip>
 										<TooltipTrigger>
 											<SelectItem disabled={!capabilities.rclone} value="rclone">
@@ -609,6 +611,81 @@ export const CreateRepositoryForm = ({
 					</>
 				)}
 
+				{watchedBackend === "sftp" && (
+					<>
+						<FormField
+							control={form.control}
+							name="server"
+							render={({ field }) => (
+								<FormItem>
+									<FormLabel>Server</FormLabel>
+									<FormControl>
+										<Input placeholder="sftp.example.com" {...field} />
+									</FormControl>
+									<FormDescription>SFTP/SSH server hostname or IP address.</FormDescription>
+									<FormMessage />
+								</FormItem>
+							)}
+						/>
+						<FormField
+							control={form.control}
+							name="port"
+							render={({ field }) => (
+								<FormItem>
+									<FormLabel>Port</FormLabel>
+									<FormControl>
+										<Input type="number" placeholder="22" {...field} />
+									</FormControl>
+									<FormDescription>SSH server port (default: 22).</FormDescription>
+									<FormMessage />
+								</FormItem>
+							)}
+						/>
+						<FormField
+							control={form.control}
+							name="username"
+							render={({ field }) => (
+								<FormItem>
+									<FormLabel>Username</FormLabel>
+									<FormControl>
+										<Input placeholder="sftpuser" {...field} />
+									</FormControl>
+									<FormDescription>SSH account username.</FormDescription>
+									<FormMessage />
+								</FormItem>
+							)}
+						/>
+						<FormField
+							control={form.control}
+							name="password"
+							render={({ field }) => (
+								<FormItem>
+									<FormLabel>Password</FormLabel>
+									<FormControl>
+										<Input type="password" placeholder="••••••••" {...field} />
+									</FormControl>
+									<FormDescription>SSH account password.</FormDescription>
+									<FormMessage />
+								</FormItem>
+							)}
+						/>
+						<FormField
+							control={form.control}
+							name="path"
+							render={({ field }) => (
+								<FormItem>
+									<FormLabel>Path</FormLabel>
+									<FormControl>
+										<Input placeholder="/home/user/backups/repository" {...field} />
+									</FormControl>
+									<FormDescription>Remote path on the SFTP server where backups will be stored.</FormDescription>
+									<FormMessage />
+								</FormItem>
+							)}
+						/>
+					</>
+				)}
+
 				{mode === "update" && (
 					<Button type="submit" className="w-full" loading={loading}>
 						Save Changes

app/schemas/restic.ts

@@ -68,13 +68,23 @@ export const restRepositoryConfigSchema = type({
 	path: "string?",
 }).and(baseRepositoryConfigSchema);
 
+export const sftpRepositoryConfigSchema = type({
+	backend: "'sftp'",
+	server: "string",
+	port: type("string.integer").or(type("number")).to("1 <= number <= 65536").default(22),
+	username: "string",
+	password: "string",
+	path: "string",
+}).and(baseRepositoryConfigSchema);
+
 export const repositoryConfigSchema = s3RepositoryConfigSchema
 	.or(r2RepositoryConfigSchema)
 	.or(localRepositoryConfigSchema)
 	.or(gcsRepositoryConfigSchema)
 	.or(azureRepositoryConfigSchema)
 	.or(rcloneRepositoryConfigSchema)
-	.or(restRepositoryConfigSchema);
+	.or(restRepositoryConfigSchema)
+	.or(sftpRepositoryConfigSchema);
 
 export type RepositoryConfig = typeof repositoryConfigSchema.infer;
 

app/server/modules/repositories/repositories.service.ts

@@ -15,7 +15,7 @@ const listRepositories = async () => {
 };
 
 const encryptConfig = async (config: RepositoryConfig): Promise<RepositoryConfig> => {
-	const encryptedConfig: Record<string, string | boolean> = { ...config };
+	const encryptedConfig: Record<string, string | boolean | number> = { ...config };
 
 	if (config.customPassword) {
 		encryptedConfig.customPassword = await cryptoUtils.encrypt(config.customPassword);
@@ -41,6 +41,9 @@ const encryptConfig = async (config: RepositoryConfig): Promise<RepositoryConfig
 				encryptedConfig.password = await cryptoUtils.encrypt(config.password);
 			}
 			break;
+		case "sftp":
+			encryptedConfig.password = await cryptoUtils.encrypt(config.password);
+			break;
 	}
 
 	return encryptedConfig as RepositoryConfig;

app/server/utils/restic.ts

@@ -88,6 +88,8 @@ const buildRepoUrl = (config: RepositoryConfig): string => {
 			const path = config.path ? `/${config.path}` : "";
 			return `rest:${config.url}${path}`;
 		}
+		case "sftp":
+			return `sftp:${config.username}@${config.server}:${config.port}${config.path}`;
 		default: {
 			throw new Error(`Unsupported repository backend: ${JSON.stringify(config)}`);
 		}
@@ -146,6 +148,13 @@ const buildEnv = async (config: RepositoryConfig) => {
 			}
 			break;
 		}
+		case "sftp": {
+			const decryptedPassword = await cryptoUtils.decrypt(config.password);
+			const passwordFilePath = path.join("/tmp", `ironmount-sftp-pass-${crypto.randomBytes(8).toString("hex")}.txt`);
+			await fs.writeFile(passwordFilePath, decryptedPassword, { mode: 0o600 });
+			env.RESTIC_SFTP_PASSWORD_FILE = passwordFilePath;
+			break;
+		}
 	}
 
 	return env;