wip: feat: accept config in Db

src/Config.zig

@@ -1,7 +1,9 @@
 const std = @import("std");
 
 /// Keys that are available for encryption
-keys: []const SSHKeyPair,
+keys: []const SSHKeyPair = &.{
+    .from_pub_path("~/.ssh/id_ed25519.pub"),
+},
 
 /// Rules for how to match the scan command
 scan: ScanConfig = .default,
@@ -12,11 +14,11 @@ pub const SSHKeyPair = struct {
 
     /// Caller owns the returned memory
     pub fn from_path(gpa: std.mem.Allocator, path: []const u8) !SSHKeyPair {
-        if (std.mem.eql(u8, std.fs.path.extension(path), ".pub")){
+        if (std.mem.eql(u8, std.fs.path.extension(path), ".pub")) {
             return from_pub_path(path);
         } else {
             return .{
-                .public = try std.mem.concat(gpa, u8, &.{path, ".pub"}),
+                .public = try std.mem.concat(gpa, u8, &.{ path, ".pub" }),
                 .private = path,
             };
         }
@@ -27,7 +29,7 @@ pub const SSHKeyPair = struct {
 
         return .{
             .public = path,
-            .private = path[0..path.len - 4],
+            .private = path[0 .. path.len - 4],
         };
     }
 };
@@ -119,7 +121,7 @@ test "saving to a new file upserts the file" {
 
     var cfg: @This() = .{
         .keys = &.{
-          .from_pub_path("~/.ssh/id_ed25519.pub"),
+            .from_pub_path("~/.ssh/id_ed25519.pub"),
         },
     };
 

src/Db.zig

@@ -1,7 +1,13 @@
+//! Db interacts with an age encrypted sqlite database.
+//!
 const std = @import("std");
 const sqlite = @import("sqlite");
 
 const age = @import("age.zig");
+const Config = @import("Config.zig");
+
+/// controls the keys and filepaths used for saving
+config: Config,
 
 /// The underlying data store.
 sql_db: sqlite.Db,
@@ -15,26 +21,23 @@ changed: bool = false,
 pub fn open(
     io: std.Io,
     gpa: std.mem.Allocator,
-    /// The path to the home directory
+    opts: OpenOptions,
-    home: []const u8,
-    /// The path to the /tmp directory
-    tmp: []const u8,
 ) !@This() {
-    // TODO: Check if database already exists
+    // TODO: Read from config?
-    const db_path = try std.fs.path.join(gpa, &.{ home, ".envr", "data.age" });
+    const db_path = try std.fs.path.join(gpa, &.{ opts.home, ".envr", "data.age" });
     defer gpa.free(db_path);
 
-    var db = try new();
+    var db = try new(opts.config);
 
     if (db_exists(io, db_path)) {
         // const tmp_dir = try std.Io.Dir.cwd().openDir(io, tmp, .{});
         // defer tmp_dir.deleteFile(io, "envr.db");
 
-        const tmp_db_path = try std.fs.path.join(gpa, &.{ tmp, "envr.db" });
+        const tmp_db_path = try std.fs.path.join(gpa, &.{ opts.tmp, "envr.db" });
         defer gpa.free(tmp_db_path);
 
-        // TODO: Fix key
+        // TODO: Pass key(s) from Config
-        try age.decrypt(io, gpa, "~/.ssh/id_ed25519", db_path, tmp_db_path);
+        try age.decrypt(io, gpa, &.{"~/.ssh/id_ed25519"}, db_path, tmp_db_path);
 
         try db.restore(tmp_db_path);
         try std.Io.Dir.cwd().deleteFile(io, tmp_db_path);
@@ -45,8 +48,18 @@ pub fn open(
     }
 }
 
+const OpenOptions = struct {
+    config: Config = .{},
+
+    /// The path to the home directory
+    home: []const u8 = "~/",
+    /// The path to the /tmp directory
+    // FIXME: Support windows
+    tmp: []const u8 = "/tmp",
+};
+
 /// Create a new instance of the database in-memory
-fn new() !@This() {
+fn new(config: Config) !@This() {
     var db = try sqlite.Db.init(.{
         .mode = .Memory,
         .open_flags = .{ .write = true, .create = true },
@@ -62,7 +75,10 @@ fn new() !@This() {
         \\)
     , .{}, .{});
 
-    return .{ .sql_db = db };
+    return .{
+        .sql_db = db,
+        .config = config,
+    };
 }
 
 /// Returns true if a file exists at ~/.envr/data.age
@@ -126,7 +142,7 @@ pub fn close(
         defer gpa.free(db_path);
 
         // FIXME: Use real key
-        try age.encrypt(io, gpa, "~/.ssh/id_ed25519.pub", tmp_db_path, db_path);
+        try age.encrypt(io, gpa, &.{"~/.ssh/id_ed25519.pub"}, tmp_db_path, db_path);
 
         self.changed = false;
     }
@@ -176,7 +192,7 @@ test "encrypted database can be opened" {
     try age.decrypt(
         io,
         gpa,
-        "./fixtures/insecure-test-key",
+        &.{"./fixtures/insecure-test-key"},
         "./fixtures/encrypted-example.db.age",
         decrypted_path,
     );
@@ -223,7 +239,7 @@ test "Closing a fresh database does not create a file" {
     const tmp = try std.fs.path.join(gpa, &.{ tmp_dir_path, "tmp" });
     defer gpa.free(tmp);
 
-    var db: @This() = try .open(io, gpa, home, tmp);
+    var db: @This() = try .open(io, gpa, .{ .home = home, .tmp = tmp });
 
     const db_path = try std.fs.path.join(gpa, &.{ home, ".envr", "data.age" });
     defer gpa.free(db_path);
@@ -240,3 +256,7 @@ test "Closing a fresh database does not create a file" {
         tmp_dir.dir.access(io, db_path, .{ .read = true }),
     );
 }
+
+// test "Closing an unmodified database does not update the file" {}
+
+// test "Closing a modified database does create a file" {}

src/age.zig

@@ -1,24 +1,32 @@
 const std = @import("std");
 
-/// Returns the decrypted contents of the file.
+/// Decrypts the file into output path
-/// Caller is responsible for freeing the memory.
 pub fn decrypt(
     io: std.Io,
     gpa: std.mem.Allocator,
-    private_key: []const u8,
+    private_keys: []const []const u8,
     input_path: []const u8,
     output_path: []const u8,
 ) !void {
+    // TODO: use raw array?
+    var argv: std.ArrayList([]const u8) = try .initCapacity(gpa, 2 + (2 * private_keys.len) + 3);
+    defer argv.deinit(gpa);
+
+    argv.appendAssumeCapacity("age");
+    argv.appendAssumeCapacity("-d");
+
+    for (private_keys) |key| {
+        argv.appendAssumeCapacity("-i");
+        argv.appendAssumeCapacity(key);
+    }
+
+    argv.appendAssumeCapacity("-o");
+    argv.appendAssumeCapacity(output_path);
+
+    argv.appendAssumeCapacity(input_path);
+
     const result = try std.process.run(gpa, io, .{
-        .argv = &.{
+        .argv = argv.items,
-            "age",
-            "-d",
-            "-i",
-            private_key,
-            "-o",
-            output_path,
-            input_path,
-        },
     });
     defer gpa.free(result.stderr);
     defer gpa.free(result.stdout);
@@ -34,25 +42,33 @@ pub fn decrypt(
     }
 }
 
-/// Returns the encrypted contents of the file.
+/// Encrypts the file into output path
-/// Caller is responsible for freeing the memory.
 pub fn encrypt(
     io: std.Io,
     gpa: std.mem.Allocator,
-    public_key: []const u8,
+    // TODO: Accept multiple keys
+    public_keys: []const []const u8,
     input_path: []const u8,
     output_path: []const u8,
 ) !void {
+    var argv: std.ArrayList([]const u8) = try .initCapacity(gpa, 2 + (2 * public_keys.len) + 3);
+    defer argv.deinit(gpa);
+
+    argv.appendAssumeCapacity("age");
+    argv.appendAssumeCapacity("-e");
+
+    for (public_keys) |key| {
+        argv.appendAssumeCapacity("-R");
+        argv.appendAssumeCapacity(key);
+    }
+
+    argv.appendAssumeCapacity("-o");
+    argv.appendAssumeCapacity(output_path);
+
+    argv.appendAssumeCapacity(input_path);
+
     const result = try std.process.run(gpa, io, .{
-        .argv = &.{
+        .argv = argv.items,
-            "age",
-            "-e",
-            "-R",
-            public_key,
-            "-o",
-            output_path,
-            input_path,
-        },
     });
     defer gpa.free(result.stderr);
     defer gpa.free(result.stdout);
@@ -84,7 +100,7 @@ test "sample file can be decrypted" {
     try decrypt(
         io,
         gpa,
-        "./fixtures/insecure-test-key",
+        &.{"./fixtures/insecure-test-key"},
         "./fixtures/hello-world.age",
         output_path,
     );
@@ -111,7 +127,7 @@ test "sample file can be encrypted" {
     try encrypt(
         io,
         gpa,
-        "./fixtures/insecure-test-key.pub",
+        &.{"./fixtures/insecure-test-key.pub"},
         "./fixtures/hello-world.txt",
         output_path,
     );