From 08472c27c77d27ea084e3458842540351c5a5c28 Mon Sep 17 00:00:00 2001
From: Martin Ashby <martin@ashbysoft.com>
Date: Wed, 27 Sep 2023 20:23:30 +0100
Subject: Add cleartext password handling. Fix segfault on error response read.
 Add test for tcp connection and incorrect password

---
 src/conn/config.zig |  4 ++--
 src/conn/conn.zig   | 42 +++++++++++++++++++++++++++++++++++++++---
 2 files changed, 41 insertions(+), 5 deletions(-)

(limited to 'src/conn')

diff --git a/src/conn/config.zig b/src/conn/config.zig
index b4e7cff..3f577d1 100644
--- a/src/conn/config.zig
+++ b/src/conn/config.zig
@@ -4,9 +4,9 @@ const SSHashMap = std.StringHashMap([]const u8);
 const Config = @This();
 
 allocator: std.mem.Allocator,
-address: union(enum){
+address: union(enum) {
     net: std.net.Address,
-    unix: []const u8,
+    unix: []const u8, // std.net.Address looks like it handles unix sockets but it doesn't really.
 },
 database: ?[]const u8 = null,
 user: []const u8,
diff --git a/src/conn/conn.zig b/src/conn/conn.zig
index 1b2bf2d..4d62f57 100644
--- a/src/conn/conn.zig
+++ b/src/conn/conn.zig
@@ -6,6 +6,7 @@ const Proto = @import("../proto/proto.zig");
 const read_message = @import("../main.zig").read_message;
 const ProtocolError = @import("../main.zig").ProtocolError;
 const ServerError = @import("../main.zig").ServerError;
+const ClientError = @import("../main.zig").ClientError;
 const diagnosticReader = @import("../main.zig").diagnosticReader;
 
 const Conn = @This();
@@ -57,6 +58,17 @@ pub fn connect(config: Config) !Conn {
                 var ar = try read_message(Proto.AuthenticationRequest, allocator, reader);
                 defer ar.deinit(allocator);
                 // TODO handle the authentication request
+                switch (ar.inner_type) {
+                    .AuthRequestTypeOk => {}, // fine do nothing!
+                    .AuthRequestTypeCleartextPassword => {
+                        if (config.password) |password| {
+                            const pm = Proto.PasswordMessage{ .password = password };
+                            try pm.write(allocator, writer);
+                        } else {
+                            return ClientError.NoPasswordSupplied;
+                        }
+                    },
+                }
                 log.info("authentication request", .{});
             },
             Proto.ReadyForQuery.Tag => {
@@ -94,9 +106,7 @@ fn deinit(self: *Conn) void {
     self.stream.close();
 }
 
-//pub fn exec(self: *Conn)
-
-test "connect" {
+test "connect unix" {
     // must have a local postgres runnning
     // TODO maybe use docker to start one?
     const allocator = std.testing.allocator;
@@ -109,3 +119,29 @@ test "connect" {
     var conn = try Conn.connect(cfg);
     defer conn.deinit();
 }
+
+test "connect tcp with password" {
+    const allocator = std.testing.allocator;
+    const cfg = Config{
+        .allocator = allocator,
+        .address = .{ .net = std.net.Address{ .in = std.net.Ip4Address.init([4]u8{ 127, 0, 0, 1 }, 5432) } },
+        .database = "martin",
+        .user = "martin",
+        .password = "martin",
+    };
+    var conn = try Conn.connect(cfg);
+    defer conn.deinit();
+}
+
+test "connect tcp with wrong password" {
+    // TODO how to disable failing tests on error log
+    // const allocator = std.testing.allocator;
+    // const cfg = Config{
+    //     .allocator = allocator,
+    //     .address = .{ .net = std.net.Address{ .in = std.net.Ip4Address.init([4]u8{ 127, 0, 0, 1 }, 5432) } },
+    //     .database = "martin",
+    //     .user = "martin",
+    //     .password = "foobar",
+    // };
+    // try std.testing.expectError(ServerError.ErrorResponse, Conn.connect(cfg));
+}
-- 
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