HAXY

▄ ▄▀▀▀▀ ▀ ▄▀▀▀▀▀ ▄▀▀▀ ▄▀▀▀▄▀▀ ▄▄▀▀▀▀▄▀ ▄▀▀▄▀▀▀▀ ▀▀▀▀▀▀▀▀▄ ▀▀▀▀▀▀▀▀▀ ▄ ▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀ ▀▄▄▀▄▀▀▀▀ ▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀ ▄ ▀▀▀▄▀▀▀▀▀▀▀ ▀▀▀▀▀ ▄▀▀▀▀▀▀▀▀▀▄▀▀▄ ▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▄ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▄ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▄ ▀▀▄ ▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄ ▀▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▄▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▄▄▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▄▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀ ▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▄▀▄ ▀▀ ▀▀▀▀▀▀▄▀▀▀▀▀▄▄▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▄▀▄▄▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀ ▀▀ ▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀ ▀ ▀▀▀▀▀▀▀▄▄▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▄▄▀▀▀▄▄▀▄▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▄▄▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▄▀▀▄ ▀▀▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀

╭ changed ─────────────────╮ │src/serve_ssh_protocol.zig│ ╰──────────────────────────╯ ╭───────────╮ │← all files│ ╰───────────╯ ╭──────────╮ │← previous│ ╰──────────╯ ╭───────────────────────────────────────────╮ │1021 return nonce; │ │1022 } │ │1023 │ │1017 - fn writePacket( │ │1024 + pub fn writePacket( │ │1025 self: *Cipher, │ │1026 io: std.Io, │ │1027 allocator: std.mem.Allocator,│ ╰───────────────────────────────────────────╯ ╭───────────────────────────────────────────╮ │1071 self.seq += 1; │ │1072 } │ │1073 │ │1067 - fn readPacket( │ │1074 + pub fn readPacket( │ │1075 self: *Cipher, │ │1076 allocator: std.mem.Allocator,│ │1077 reader: *std.Io.Reader, │ ╰───────────────────────────────────────────╯ ╭──────────────────────────────────────────────────────────────────────────────────╮ │1284 try sc_cipher.writePacket(io, allocator, writer, buf.items); │ │1285 } │ │1286 │ │1287 +/// Append the canonical publickey-signed-data bytes (RFC 4252 §7) to `buf`.│ │1288 +/// Used by the server to recompute the signed input for verification │ │1289 +pub fn appendPublickeySignedData( │ │1290 + buf: *std.ArrayList(u8), │ │1291 + allocator: std.mem.Allocator, │ │1292 + session_id: []const u8, │ │1293 + user_name: []const u8, │ │1294 + service_name: []const u8, │ │1295 + algo: []const u8, │ │1296 + pubkey_blob: []const u8, │ │1297 +) !void { │ │1298 + try writeStringField(buf, allocator, session_id); │ │1299 + try buf.append(allocator, SSH_MSG_USERAUTH_REQUEST); │ │1300 + try writeStringField(buf, allocator, user_name); │ │1301 + try writeStringField(buf, allocator, service_name); │ │1302 + try writeStringField(buf, allocator, "publickey"); │ │1303 + try buf.append(allocator, 1); │ │1304 + try writeStringField(buf, allocator, algo); │ │1305 + try writeStringField(buf, allocator, pubkey_blob); │ │1306 +} │ │1307 + │ │1308 // build the bytes a publickey signature is computed over (RFC 4252 §7) and │ │1309 // verify the supplied signature against them. │ │1310 fn verifyUserauthSignature( │ ╰──────────────────────────────────────────────────────────────────────────────────╯ ╭────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮ │1316 pubkey_blob: []const u8, │ │1317 signature_blob: []const u8, │ │1318 ) !bool { │ │1291 - // signed data: │ │1292 - // string session_id │ │1293 - // byte SSH_MSG_USERAUTH_REQUEST │ │1294 - // string user_name │ │1295 - // string service_name │ │1296 - // string "publickey" │ │1297 - // bool TRUE │ │1298 - // string algo │ │1299 - // string pubkey │ │1319 var signed: std.ArrayList(u8) = .empty; │ │1320 defer signed.deinit(allocator); │ │1302 - try writeStringField(&signed, allocator, session_id); │ │1303 - try signed.append(allocator, SSH_MSG_USERAUTH_REQUEST); │ │1304 - try writeStringField(&signed, allocator, user_name); │ │1305 - try writeStringField(&signed, allocator, service_name); │ │1306 - try writeStringField(&signed, allocator, "publickey"); │ │1307 - try signed.append(allocator, 1); │ │1308 - try writeStringField(&signed, allocator, algo); │ │1309 - try writeStringField(&signed, allocator, pubkey_blob); │ │1321 + try appendPublickeySignedData(&signed, allocator, session_id, user_name, service_name, algo, pubkey_blob);│ │1322 │ │1323 // parse pubkey_blob: string "ssh-ed25519" || string raw_pubkey │ │1324 var pubkey_reader = std.Io.Reader.fixed(pubkey_blob); │ ╰────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯ ╭────────────────────────────────────────────────────────────────────────────────────────────────╮ │1718 try sc_cipher.writePacket(io, allocator, writer, adj.items); │ │1719 } │ │1720 │ │1709 -fn writeU32(buf: *std.ArrayList(u8), allocator: std.mem.Allocator, value: u32) !void { │ │1721 +pub fn writeU32(buf: *std.ArrayList(u8), allocator: std.mem.Allocator, value: u32) !void {│ │1722 var bytes: [4]u8 = undefined; │ │1723 std.mem.writeInt(u32, &bytes, value, .big); │ │1724 try buf.appendSlice(allocator, &bytes); │ ╰────────────────────────────────────────────────────────────────────────────────────────────────╯