[esphome][ota][core] Compress OTA uploads on ESP32, RP2040, LibreTiny and host (#19037)

2026-10-05 10:31:29 +00:00 · 2026-10-02 08:00:10 -05:00
parent 797682cccc
commit d970e9292e
27 changed files with 1440 additions and 113 deletions
@@ -0,0 +1,12 @@
+from esphome.loader import FileResource
+from tests.testing_helpers import ComponentManifestOverride
+
+
+def override_manifest(manifest: ComponentManifestOverride) -> None:
+    # to_code emits the component count the application needs
+    manifest.enable_codegen()
+    # Only the decoder is under test; its ota platform is not in this build
+    manifest.resources = manifest.resources + [
+        FileResource("esphome.components.esphome", "ota/ota_esphome_inflate.c"),
+        FileResource("esphome.components.esphome", "ota/ota_esphome_inflate.h"),
+    ]
@@ -0,0 +1,324 @@
+#include <gtest/gtest.h>
+
+#include <cstdint>
+#include <cstring>
+#include <vector>
+
+#include "esphome/components/esphome/ota/ota_esphome_inflate.h"
+
+namespace esphome::testing {
+
+// build_plain() compressed with the CLI's window (espota2.DEFLATE_WINDOW_BITS):
+//   DEFLATED = zlib.compress(plain, 9, wbits=-12)
+//   STORED = zlib.compress(plain[:300], 0, wbits=-12)
+static const uint8_t DEFLATED[] = {
+    0xed, 0xc8, 0xf7, 0x3f, 0xd4, 0x0f, 0x03, 0x00, 0x70, 0x67, 0xaf, 0x4b, 0x67, 0x66, 0x9f, 0x90, 0x91, 0x11, 0xc2,
+    0x11, 0x91, 0xb8, 0xb3, 0xf7, 0x3a, 0xd9, 0x5f, 0x4e, 0x99, 0x67, 0x1e, 0xce, 0x8a, 0xac, 0xec, 0x59, 0xb8, 0xc2,
+    0x95, 0x5d, 0x56, 0x42, 0x67, 0x73, 0x46, 0xf6, 0xca, 0xce, 0xc8, 0xc8, 0xc8, 0x91, 0x8a, 0x7c, 0x2f, 0x7a, 0xfe,
+    0x86, 0xe7, 0x87, 0xe7, 0x87, 0xe7, 0xf5, 0xfa, 0xbc, 0x7f, 0x7c, 0xbb, 0x07, 0xa2, 0x1f, 0xfa, 0xf9, 0xb8, 0x43,
+    0xfd, 0x82, 0x5c, 0xa0, 0x6e, 0xee, 0x28, 0x6f, 0x97, 0x20, 0x77, 0xa8, 0x3b, 0x70, 0xc0, 0x01, 0x07, 0x1c, 0x70,
+    0xc0, 0x01, 0x07, 0x1c, 0x70, 0xc0, 0x01, 0x07, 0x1c, 0x70, 0xc0, 0x01, 0x07, 0x1c, 0x70, 0xc0, 0x01, 0x07, 0x1c,
+    0x70, 0xc0, 0x01, 0xf7, 0x5f, 0xdd, 0x40, 0xd4, 0x63, 0x2f, 0x03, 0xf2, 0x17, 0xb2, 0xe5, 0x69, 0xc7, 0x5a, 0x04,
+    0xdf, 0x46, 0x22, 0xa8, 0x4b, 0x6e, 0xd5, 0x3a, 0x80, 0x05, 0xe1, 0x81, 0x4a, 0x44, 0x56, 0x27, 0xa9, 0x21, 0xf7,
+    0xad, 0xd9, 0xb0, 0xd3, 0xf1, 0xa5, 0x0b, 0x6a, 0x96, 0x56, 0xb2, 0xca, 0xb5, 0xee, 0x0f, 0x96, 0x28, 0xc3, 0x9e,
+    0x8f, 0x6e, 0xf2, 0x84, 0xa4, 0x3b, 0x2d, 0x16, 0x64, 0x08, 0x6a, 0x28, 0x91, 0xee, 0x87, 0x1a, 0x81, 0xff, 0xed,
+    0x2c, 0x5f, 0xda, 0x4a, 0x48, 0x5f, 0x91, 0xf0, 0x31, 0xfe, 0x6b, 0xbd, 0x81, 0x86, 0x92, 0x33, 0x1a, 0x6c, 0x69,
+    0x32, 0xfb, 0x19, 0x56, 0x2c, 0xc6, 0xaa, 0xef, 0xe8, 0x16, 0x98, 0xcf, 0x98, 0xbf, 0xa0, 0x2d, 0xde, 0x7f, 0xdf,
+    0x4b, 0xcb, 0xf6, 0x5c, 0xaf, 0x11, 0x24, 0xf0, 0x46, 0x3e, 0x49, 0x0e, 0x67, 0x0e, 0xcf, 0xf3, 0x57, 0xca, 0xb0,
+    0x39, 0x55, 0xe1, 0xe7, 0xfc, 0x37, 0x29, 0xe8, 0xd7, 0xf3, 0x08, 0x2e, 0xfb, 0x7b, 0x6d, 0x3e, 0xfe, 0xe9, 0x2c,
+    0x68, 0xe4, 0x20, 0x88, 0x57, 0x56, 0x41, 0x3d, 0xab, 0x9b, 0xbf, 0x0c, 0x0c, 0xae, 0x51, 0x48, 0x8b, 0x72, 0xcc,
+    0xb8, 0xbb, 0xf3, 0x30, 0xa8, 0x5c, 0xb5, 0xa1, 0x2f, 0x07, 0x52, 0xe9, 0x36, 0xb8, 0x3c, 0xbc, 0xee, 0xbc, 0xf1,
+    0xa3, 0x8b, 0x81, 0xc2, 0x03, 0xbf, 0x29, 0x5a, 0x22, 0x24, 0x97, 0xf8, 0xc9, 0xb5, 0xbf, 0xd2, 0x24, 0x4a, 0x86,
+    0xc1, 0x2b, 0xb7, 0xb8, 0xde, 0xa7, 0xea, 0xa5, 0x1d, 0x13, 0x1c, 0x1d, 0xd3, 0x3c, 0x81, 0x60, 0x2e, 0x2f, 0x93,
+    0x5c, 0x78, 0x43, 0x2e, 0x39, 0x68, 0x09, 0x13, 0x09, 0x10, 0xce, 0xd6, 0x8d, 0xe9, 0x2f, 0xaf, 0x88, 0x6f, 0x99,
+    0x4f, 0xcd, 0xdc, 0xaa, 0xf9, 0x47, 0xdb, 0x1c, 0xb5, 0x89, 0x53, 0x10, 0x3d, 0x77, 0xac, 0x26, 0x04, 0x3a, 0x3b,
+    0x18, 0xf8, 0x47, 0x75, 0x56, 0xa5, 0xda, 0x70, 0xfb, 0xf7, 0x0d, 0x3b, 0x6e, 0x4b, 0x2a, 0xbc, 0x49, 0x32, 0x43,
+    0x95, 0x62, 0x83, 0x3d, 0xdc, 0x0a, 0x1f, 0x1d, 0xf9, 0x59, 0x6b, 0x95, 0xf0, 0x9b, 0xf5, 0x53, 0x9e, 0xb5, 0x65,
+    0xeb, 0x74, 0xfa, 0x81, 0x9b, 0x61, 0xa3, 0x57, 0x2f, 0xda, 0x2c, 0xcd, 0xf8, 0xb0, 0x74, 0xb9, 0x62, 0x39, 0x91,
+    0xd9, 0x7d, 0xb3, 0x03, 0x65, 0x2e, 0x66, 0x20, 0x18, 0xac, 0xa2, 0xeb, 0x3b, 0x35, 0x98, 0xa3, 0x28, 0x46, 0x30,
+    0xee, 0xd3, 0xeb, 0x47, 0x49, 0x11, 0xc5, 0xcd, 0xa0, 0xa5, 0x1c, 0x2e, 0x9d, 0x14, 0xd6, 0x46, 0x4a, 0x05, 0x7b,
+    0xd3, 0xb9, 0x0d, 0xeb, 0xd7, 0x6f, 0xb5, 0xf4, 0xed, 0x3f, 0x27, 0xb8, 0xec, 0x51, 0xb1, 0x6e, 0xb0, 0x14, 0xed,
+    0xdf, 0x90, 0x72, 0x59, 0x71, 0xd5, 0xf5, 0xf2, 0x61, 0x5f, 0xa7, 0x8a, 0xd7, 0x0f, 0x80, 0x2f, 0xe5, 0x0f, 0x45,
+    0xf2, 0x4d, 0xd1, 0xdc, 0xdd, 0xce, 0x46, 0xdf, 0x77, 0xf2, 0xa6, 0xa2, 0x79, 0x77, 0xf0, 0x0e, 0xaa, 0x68, 0x14,
+    0x85, 0x32, 0x05, 0x29, 0x75, 0x2b, 0x6c, 0xb0, 0x7c, 0x84, 0xc9, 0xec, 0x49, 0x70, 0x9b, 0x38, 0x36, 0x4c, 0xe9,
+    0xa5, 0xdc, 0xb1, 0xb8, 0x28, 0xd6, 0x20, 0x89, 0x8a, 0x2a, 0x62, 0xc1, 0x90, 0x3a, 0x43, 0x48, 0xaa, 0xfc, 0xec,
+    0x52, 0xf4, 0x02, 0xa7, 0xcd, 0x46, 0xf9, 0x78, 0x64, 0x4f, 0xad, 0x6b, 0x17, 0xdb, 0x56, 0xa2, 0xa1, 0x6a, 0xcf,
+    0x3b, 0x66, 0x64, 0x01, 0xc2, 0xd6, 0xae, 0x23, 0x34, 0x82, 0x60, 0x0a, 0x3a, 0xe4, 0xdd, 0x7f, 0xaa, 0x97, 0x44,
+    0x9a, 0x63, 0x8f, 0xaf, 0xa9, 0x97, 0x5a, 0x55, 0xcc, 0x81, 0x48, 0x83, 0xf8, 0xe6, 0xc5, 0xef, 0xdf, 0xfa, 0x5a,
+    0x4f, 0x7f, 0x18, 0x56, 0xc0, 0x66, 0x36, 0xad, 0x8a, 0x79, 0xab, 0xde, 0xf4, 0x7b, 0x70, 0x98, 0xea, 0xfa, 0xf4,
+    0xc7, 0x01, 0x31, 0x16, 0xea, 0xf1, 0x70, 0x8d, 0xee, 0x87, 0x52, 0x13, 0x01, 0x9e, 0x0c, 0xbd, 0x5a, 0x14, 0x01,
+    0x8e, 0xf7, 0x6e, 0xff, 0xce, 0x7f, 0xa4, 0xd1, 0xa1, 0x6a, 0x9b, 0x95, 0xb2, 0x31, 0x8a, 0x6f, 0xc8, 0xfe, 0x8c,
+    0x29, 0x55, 0xbc, 0xfc, 0x61, 0xd0, 0xde, 0xb0, 0xa9, 0x0c, 0x01, 0x0f, 0xba, 0x77, 0x7e, 0x77, 0xd9, 0x76, 0xa4,
+    0xfd, 0xab, 0x38, 0x18, 0x92, 0xec, 0xf0, 0xd3, 0x57, 0x7f, 0xf4, 0xbd, 0x65, 0xd4, 0x77, 0x8e, 0xa1, 0x92, 0x82,
+    0x0c, 0x7b, 0x34, 0xd3, 0x11, 0xfb, 0xc0, 0x36, 0x23, 0x8e, 0xbb, 0x89, 0xdf, 0x70, 0xdc, 0x9a, 0x76, 0x45, 0x0b,
+    0x22, 0xfa, 0x35, 0xdf, 0x8f, 0x45, 0x48, 0x7d, 0xed, 0xdc, 0x06, 0x01, 0x5e, 0xbb, 0xe9, 0xf9, 0x07, 0x93, 0xf6,
+    0x69, 0x6f, 0xf1, 0xfc, 0xfd, 0xfa, 0x41, 0xc0, 0x13, 0x9e, 0x74, 0x2d, 0x76, 0xfe, 0xa7, 0xbe, 0x4e, 0xd9, 0xaa,
+    0x64, 0xa6, 0xed, 0xd3, 0xad, 0xee, 0x62, 0x9d, 0x39, 0xc9, 0xb8, 0xae, 0x86, 0x31, 0x4f, 0x62, 0x57, 0xea, 0xea,
+    0x5a, 0xe3, 0x59, 0xd8, 0x99, 0xb3, 0xcd, 0x9f, 0x3b, 0xea, 0x58, 0x99, 0x11, 0xdc, 0x3d, 0xac, 0x58, 0xd9, 0xa6,
+    0xae, 0x2d, 0x07, 0x1d, 0xd7, 0xfa, 0x87, 0x78, 0xa7, 0x7f, 0x2a, 0x4f, 0x25, 0x58, 0xef, 0x53, 0x78, 0x2e, 0x93,
+    0xdc, 0x44, 0xcc, 0x53, 0x88, 0x77, 0x1c, 0xda, 0x14, 0xaf, 0xe1, 0x67, 0x92, 0xff, 0x36, 0x96, 0x20, 0x6f, 0x9d,
+    0x2c, 0x7f, 0xea, 0x31, 0xf2, 0x34, 0x50, 0xc2, 0x39, 0x84, 0xee, 0x4c, 0xbe, 0xca, 0x06, 0x6f, 0x67, 0x42, 0xea,
+    0x13, 0x58, 0xee, 0xdd, 0x8e, 0x29, 0x4f, 0xee, 0xd8, 0x93, 0x0d, 0x45, 0x80, 0x4d, 0xf3, 0x12, 0x79, 0xbb, 0x36,
+    0xa3, 0x73, 0x95, 0x95, 0xb6, 0xfc, 0x54, 0x60, 0xb2, 0xcc, 0x71, 0xaa, 0xf1, 0x6b, 0x66, 0xed, 0xba, 0x8b, 0xd6,
+    0x6d, 0x61, 0x79, 0x61, 0x1d, 0xb3, 0xba, 0xa6, 0x2f, 0xaa, 0xdc, 0x1d, 0xb8, 0x22, 0xd8, 0x98, 0x58, 0xed, 0x4d,
+    0x3c, 0xea, 0xa9, 0x37, 0x5e, 0x5e, 0x7b, 0x47, 0xa1, 0x7a, 0x39, 0x42, 0xe4, 0x3b, 0xbb, 0x69, 0x0a, 0x8b, 0x32,
+    0x6e, 0x63, 0xeb, 0x87, 0xf6, 0x5d, 0xaa, 0xbf, 0xbe, 0xc5, 0xb2, 0x85, 0x60, 0xdc, 0x32, 0x07, 0x85, 0x73, 0x3d,
+    0x96, 0x8b, 0x89, 0x71, 0x52, 0xb4, 0x93, 0xe6, 0x18, 0xad, 0xbf, 0xce, 0x21, 0x1d, 0x33, 0xb5, 0xb3, 0x35, 0x6a,
+    0x5b, 0xe7, 0x47, 0x13, 0x19, 0x8f, 0x53, 0xf4, 0x0c, 0x2a, 0x39, 0x16, 0x37, 0x39, 0x3b, 0x5f, 0x81, 0x51, 0xbc,
+    0x23, 0x92, 0x2c, 0x8d, 0xbf, 0x2f, 0xee, 0xbf, 0xed, 0x9d, 0x3f, 0xe0, 0x16, 0x21, 0x5a, 0x57, 0xa6, 0x8c, 0x58,
+    0x7a, 0xd5, 0xa1, 0x6d, 0xed, 0xe8, 0x90, 0x97, 0x14, 0xb4, 0x6b, 0xa5, 0x3b, 0xd7, 0x90, 0x84, 0x9e, 0x07, 0xc2,
+    0x7f, 0x1e, 0x08, 0xa0, 0x6f, 0x69, 0xf1, 0xcc, 0x4e, 0xca, 0x07, 0x64, 0xa2, 0xb4, 0xbc, 0x5f, 0xe0, 0xa7, 0x0e,
+    0x31, 0x77, 0x6f, 0x35, 0xd7, 0x66, 0x83, 0x5d, 0x64, 0x4e, 0xf1, 0x3c, 0x7a, 0xcb, 0xa5, 0xfc, 0xc9, 0x95, 0xab,
+    0x27, 0x30, 0x6b, 0x82, 0x57, 0xcd, 0xb0, 0x85, 0x9d, 0xc5, 0xa9, 0x0f, 0xdb, 0xe3, 0x5a, 0xc1, 0xb2, 0x3f, 0xfa,
+    0xea, 0xf3, 0x3a, 0xa0, 0xe4, 0xad, 0xd7, 0x14, 0xcf, 0x4f, 0xc9, 0x46, 0x09, 0x6e, 0x70, 0x27, 0xe4, 0x9b, 0x5f,
+    0x61, 0x4a, 0xb2, 0xfb, 0xc3, 0xf0, 0x3a, 0x53, 0x38, 0x2a, 0x59, 0x48, 0x2b, 0xab, 0x21, 0x64, 0x1a, 0x1c, 0x90,
+    0xb6, 0x69, 0xbb, 0x89, 0xe3, 0x9a, 0x12, 0xb7, 0xfd, 0x47, 0xcc, 0x57, 0xdb, 0x2b, 0xf6, 0x35, 0xe1, 0x79, 0xe0,
+    0xbf, 0x6d, 0x7f, 0x71, 0x3c, 0x21, 0x27, 0x82, 0x12, 0x05, 0xae, 0x43, 0x11, 0x0f, 0xc8, 0xe7, 0x3c, 0xf0, 0x0b,
+    0xe4, 0x69, 0xff, 0xb2, 0xda, 0x9e, 0x7f, 0xfe, 0xa4, 0x3f, 0xdf, 0x02, 0x58, 0xaa, 0x60, 0xd2, 0x8e, 0xd5, 0x6c,
+    0x92, 0x22, 0x38, 0xb1, 0xd2, 0x84, 0x80, 0xea, 0xce, 0xfe, 0x34, 0x79, 0xd6, 0x94, 0xb0, 0xad, 0x51, 0x67, 0x65,
+    0xf5, 0xab, 0xd5, 0x18, 0x05, 0x92, 0x8a, 0x24, 0x36, 0xc2, 0xc4, 0x99, 0xad, 0x0d, 0x26, 0xb8, 0x70, 0xea, 0x5b,
+    0x74, 0x35, 0x6a, 0xfa, 0xac, 0x97, 0xd8, 0x4c, 0x08, 0x6d, 0xc1, 0xfe, 0x60, 0xe4, 0xd4, 0x8f, 0x93, 0xd4, 0xaf,
+    0xa2, 0xec, 0xb8, 0x71, 0xf6, 0xcb, 0x3f, 0xdc, 0x3e, 0x42, 0xca, 0xe2, 0x8d, 0xb9, 0x0a, 0x2c, 0xef, 0xb6, 0x18,
+    0x75, 0x46, 0x8a, 0x2b, 0x21, 0xeb, 0xc5, 0x12, 0x4d, 0xd7, 0xb8, 0x8e, 0x6c, 0xec, 0x9d, 0x12, 0xde, 0xa5, 0x45,
+    0xab, 0xc4, 0x26, 0x47, 0xfa, 0x57, 0xad, 0x78, 0x4c, 0x5e, 0x87, 0x0b, 0x42, 0x6a, 0xbe, 0xef, 0xbd, 0xbc, 0xe5,
+    0xd7, 0x4c, 0x3a, 0x0f, 0x96, 0x29, 0xcb, 0x45, 0x46, 0x3f, 0x8a, 0x31, 0xda, 0x8d, 0x7f, 0x89, 0xa4, 0xd6, 0xb4,
+    0xe5, 0x99, 0x27, 0xa7, 0xab, 0x15, 0x82, 0x75, 0x3e, 0xc0, 0x9d, 0xae, 0x8c, 0x7f, 0x19, 0x80, 0xf5, 0xa6, 0x89,
+    0xbc, 0xb7, 0x36, 0x50, 0x1f, 0x63, 0xca, 0x40, 0x3e, 0xe1, 0x4c, 0x2d, 0x1e, 0x15, 0x51, 0x93, 0xf2, 0x1a, 0x97,
+    0x3e, 0xad, 0x5e, 0xba, 0xe2, 0xd6, 0xa7, 0x7c, 0x51, 0x45, 0xdf, 0x92, 0xbe, 0x35, 0xf3, 0xb4, 0xe8, 0x5c, 0x2e,
+    0x6a, 0x5c, 0xda, 0xe8, 0xf7, 0x51, 0xdc, 0xcb, 0x06, 0xd2, 0xd2, 0xa4, 0x7c, 0x7d, 0x5f, 0x20, 0xb8, 0x50, 0x04,
+    0xb5, 0xb1, 0x9a, 0x4e, 0xc9, 0x94, 0xe4, 0x40, 0x2b, 0x85, 0xc8, 0xd3, 0x71, 0xfa, 0x83, 0x81, 0x28, 0x53, 0xef,
+    0xa0, 0xb0, 0xf0, 0xc8, 0xb9, 0x52, 0xb2, 0x0f, 0x8c, 0x49, 0x93, 0xeb, 0x2a, 0x95, 0x83, 0x4f, 0x47, 0xe8, 0x0c,
+    0x83, 0x7b, 0x88, 0x18, 0x63, 0xa9, 0x87, 0x7f, 0xe3, 0x57, 0xa6, 0x57, 0xdd, 0x6d, 0x2a, 0x85, 0xe9, 0x79, 0x16,
+    0x3b, 0x07, 0x59, 0x4f, 0xed, 0x9a, 0x17, 0xe7, 0xcd, 0x35, 0xa6, 0x9b, 0x06, 0x1d, 0x18, 0x5e, 0xb2, 0x9b, 0xac,
+    0x18, 0xc6, 0x5b, 0xec, 0xbe, 0x29, 0xa3, 0x57, 0xc2, 0x6b, 0x3f, 0x11, 0x89, 0xd1, 0x57, 0xe4, 0xb8, 0xaf, 0x11,
+    0xba, 0x90, 0x93, 0x4f, 0x5e, 0x0c, 0x6b, 0x9f, 0x61, 0x5c, 0xdd, 0xb6, 0xcf, 0x18, 0xcc, 0x9a, 0x95, 0x32, 0x5f,
+    0x6f, 0xf1, 0x43, 0x17, 0x2d, 0xbc, 0x70, 0xbe, 0xd4, 0x76, 0x38, 0x42, 0xcc, 0xdd, 0xf0, 0xff, 0x5b, 0xe8, 0x19,
+    0xc9, 0xf4, 0x25, 0xda, 0xdb, 0x5f, 0xd2, 0x3c, 0xf3, 0xe0, 0xed, 0xb0, 0xa2, 0x4c, 0xdf, 0x05, 0xf2, 0x0c, 0xc4,
+    0x21, 0xb9, 0xc4, 0x02, 0xd2, 0x1e, 0x46, 0x2c, 0x57, 0x78, 0xb0, 0xf1, 0x85, 0x33, 0x51, 0xc5, 0x3e, 0xce, 0x69,
+    0x68, 0x77, 0x3e, 0xb4, 0x5a, 0x4e, 0x43, 0x89, 0x85, 0x71, 0x36, 0x84, 0x56, 0x5c, 0x6b, 0xce, 0x78, 0x4e, 0x86,
+    0x6a, 0x5f, 0xf1, 0x2d, 0x73, 0x4c, 0xba, 0xc1, 0x5e, 0x2b, 0x6e, 0x0d, 0xdd, 0x45, 0x1d, 0x92, 0xb4, 0x31, 0xd9,
+    0xce, 0x0b, 0x58, 0x67, 0xc1, 0xa6, 0x47, 0x2e, 0x5e, 0x6d, 0x6d, 0xa3, 0x78, 0xed, 0xc5, 0xcb, 0xac, 0x20, 0xb8,
+    0x6a, 0x14, 0x32, 0x55, 0xe8, 0xfb, 0xe0, 0xee, 0x31, 0xfc, 0x47, 0x33, 0xf6, 0xe7, 0x54, 0xd1, 0x61, 0x91, 0x74,
+    0x90, 0xfa, 0x44, 0x0a, 0xc8, 0xaf, 0xa2, 0xdb, 0x2c, 0x83, 0xda, 0xe8, 0xd0, 0xb7, 0x34, 0x8a, 0xc8, 0xbb, 0x86,
+    0x58, 0x82, 0x1a, 0x2f, 0xd6, 0xc5, 0x92, 0xe9, 0xd0, 0x21, 0x11, 0xf6, 0xeb, 0x9b, 0xed, 0xbf, 0xa9, 0x71, 0x89,
+    0xb2, 0x59, 0x76, 0xb3, 0xeb, 0x9c, 0xe1, 0x73, 0x79, 0x7b, 0x11, 0x3d, 0x4e, 0x33, 0xca, 0xf6, 0x7e, 0xd8, 0xcf,
+    0x06, 0x41, 0x39, 0xef, 0x78, 0x5a, 0x89, 0x69, 0x0c, 0xff, 0xda, 0x31, 0x16, 0x32, 0xd4, 0xe5, 0x2d, 0x8b, 0x22,
+    0xb9, 0x82, 0x38, 0xd8, 0x22, 0xfc, 0xe8, 0xbd, 0xbf, 0x0d, 0x4b, 0xc9, 0x0d, 0x74, 0x5e, 0x2d, 0xb2, 0x1f, 0x23,
+    0xa8, 0xf8, 0xa7, 0x27, 0xe1, 0x02, 0x61, 0x83, 0xc4, 0xd0, 0x63, 0x0e, 0x23, 0xf2, 0x34, 0x06, 0x69, 0xd1, 0xa3,
+    0xa2, 0x76, 0x76, 0x94, 0xbc, 0x1f, 0x78, 0x73, 0x5a, 0x48, 0x82, 0xb4, 0x68, 0x3d, 0x24, 0x52, 0xe8, 0x92, 0x4e,
+    0x58, 0xdf, 0x55, 0x3f, 0xa8, 0x48, 0x59, 0x35, 0x90, 0x9b, 0x55, 0xc9, 0xdc, 0xff, 0xcc, 0x22, 0x7c, 0xd1, 0x29,
+    0xe0, 0xd5, 0xd8, 0x31, 0x3d, 0x9b, 0xae, 0x38, 0x52, 0x2a, 0xa1, 0xc5, 0x86, 0x19, 0x93, 0xe7, 0x2d, 0x9b, 0xa9,
+    0x09, 0xbf, 0xdd, 0x89, 0x43, 0x35, 0xb2, 0x6f, 0x91, 0xba, 0x28, 0xfa, 0x2f, 0x2c, 0xab, 0xe8, 0x58, 0xe6, 0x4c,
+    0xbf, 0xd5, 0xaf, 0x49, 0xcd, 0x7f, 0x18, 0xa4, 0x69, 0xd3, 0xff, 0x99, 0xad, 0x9d, 0xb0, 0x93, 0x3b, 0x04, 0x01,
+    0xd5, 0x7d, 0x33, 0xe0, 0x66, 0xe2, 0xd4, 0xeb, 0xae, 0xcd, 0x7f, 0x66, 0xf2, 0x2c, 0xa7, 0xfe, 0x7d, 0x51, 0x8b,
+    0x2a, 0x25, 0xa8, 0x90, 0xb2, 0x71, 0xe5, 0x98, 0x40, 0xb8, 0xe9, 0x1f, 0x64, 0xd9, 0x90, 0xf2, 0x39, 0x25, 0x6f,
+    0x58, 0x35, 0x9e, 0x40, 0x25, 0x92, 0xbb, 0xa2, 0x4d, 0x45, 0xf6, 0xc3, 0x1a, 0xc6, 0xc0, 0xf6, 0xc2, 0x9b, 0x2b,
+    0xb5, 0xc7, 0xe9, 0xc8, 0x75, 0x03, 0x71, 0x1c, 0x76, 0x0e, 0xde, 0x5c, 0xe7, 0xf4, 0x91, 0xc4, 0x1d, 0x9f, 0xcb,
+    0x67, 0x1c, 0x1b, 0xc9, 0x25, 0x6d, 0x95, 0x05, 0xd7, 0x3b, 0xbf, 0x2d, 0x90, 0x96, 0xc3, 0x44, 0xa3, 0x0a, 0xee,
+    0x7a, 0x4c, 0x7e, 0x7f, 0xc2, 0x4e, 0x4f, 0x38, 0x88, 0xe9, 0x9f, 0x93, 0xd8, 0xd1, 0x10, 0x8c, 0x85, 0x89, 0xb2,
+    0xd0, 0x95, 0xc3, 0xe4, 0xd2, 0x8f, 0x2b, 0x0c, 0x82, 0xbd, 0x25, 0x74, 0x39, 0xe7, 0x3e, 0xef, 0xd2, 0x2f, 0x6f,
+    0xdc, 0xe0, 0x75, 0x6b, 0xf2, 0x66, 0x7d, 0x65, 0x18, 0x26, 0xb0, 0x7a, 0x7a, 0x45, 0xf0, 0xf2, 0xc4, 0xbe, 0x70,
+    0x6e, 0x58, 0x3a, 0x54, 0x31, 0x64, 0xf6, 0x49, 0xb5, 0xdc, 0x1c, 0x9e, 0x87, 0xdb, 0x6a, 0x92, 0x2a, 0x59, 0x73,
+    0x35, 0x4d, 0x59, 0xed, 0xd0, 0x8a, 0xd9, 0xac, 0xea, 0x7c, 0xc0, 0x0a, 0xfe, 0x8f, 0x29, 0xb7, 0xda, 0xdc, 0x8a,
+    0x55, 0x0f, 0x61, 0xc0, 0x82, 0x49, 0x4c, 0xc2, 0x51, 0x4b, 0x41, 0x7d, 0x1f, 0xf1, 0x07, 0x13, 0x23, 0x16, 0xe4,
+    0x88, 0x76, 0x38, 0x92, 0xbd, 0x3d, 0xe2, 0x7b, 0xab, 0x1c, 0x53, 0x35, 0xfb, 0x85, 0x76, 0x35, 0xf7, 0xfc, 0xdc,
+    0x3e, 0xc9, 0xae, 0x6a, 0x7c, 0x10, 0x44, 0xa5, 0xfb, 0xc4, 0x81, 0x9a, 0x6d, 0x9b, 0xf2, 0x87, 0x0a, 0x9e, 0xcd,
+    0x75, 0xc2, 0xd5, 0xe7, 0x0b, 0xcd, 0x5c, 0x6e, 0xf2, 0x51, 0x96, 0xa3, 0xe8, 0xd5, 0x5a, 0x17, 0xf5, 0x1a, 0x28,
+    0xff, 0xc8, 0xf0, 0xfc, 0x7e, 0x3b, 0xd3, 0xf3, 0x12, 0x61, 0xe9, 0x02, 0xfa, 0x7b, 0x8e, 0x6b, 0x34, 0x4a, 0x5a,
+    0xb6, 0xb1, 0x71, 0x7d, 0xad, 0xbc, 0x88, 0x22, 0xf6, 0x14, 0xc5, 0x57, 0x1a, 0x0b, 0xb6, 0x8b, 0xbb, 0x9a, 0x09,
+    0xf2, 0xe8, 0x8d, 0x32, 0xd1, 0x54, 0xa9, 0xd2, 0x9f, 0xc5, 0xf4, 0x12, 0xad, 0xb3, 0xfd, 0x52, 0xb7, 0xff, 0x0e,
+    0x72, 0x59, 0xcb, 0x1d, 0x8d, 0xa4, 0xf2, 0x0f, 0x39, 0x8f, 0xc9, 0x84, 0xe0, 0x5c, 0xdd, 0x9c, 0xe4, 0x42, 0x4f,
+    0xf2, 0x09, 0x1e, 0x05, 0xcc, 0x41, 0xdd, 0xbd, 0xc1, 0xed, 0xdc, 0x8e, 0x64, 0xc3, 0x67, 0x51, 0xe5, 0x8a, 0x9a,
+    0x0d, 0x09, 0xb8, 0x4b, 0xa1, 0xb2, 0xdb, 0x01, 0xde, 0xf5, 0xd1, 0x51, 0xf7, 0x9d, 0x88, 0x59, 0xfd, 0xd5, 0x13,
+    0x0d, 0x05, 0xd5, 0x5e, 0xfa, 0x63, 0x26, 0x25, 0xad, 0x01, 0x83, 0x6f, 0xf3, 0x7f, 0x56, 0x11, 0x89, 0xaa, 0xdb,
+    0x49, 0xaa, 0x8f, 0x7d, 0x10, 0x99, 0xbf, 0x8b, 0xcf, 0xf4, 0xf8, 0xc2, 0x4e, 0x36, 0xa7, 0xb1, 0xfe, 0xc5, 0xf0,
+    0x07, 0xc3, 0x57, 0xe3, 0xbd, 0x1e, 0xa1, 0x56, 0x46, 0x32, 0x43, 0x8f, 0x8d, 0xc7, 0x73, 0x0a, 0xa5, 0x35, 0xa9,
+    0x93, 0x7c, 0x53, 0x3c, 0xf2, 0x58, 0xf3, 0x6a, 0x37, 0x41, 0xb4, 0xc7, 0x9d, 0xcd, 0xb1, 0x67, 0xb7, 0xaa, 0x5f,
+    0x25, 0xb9, 0xc5, 0xb6, 0xa2, 0xdb, 0xce, 0x34, 0x2c, 0xea, 0x93, 0x45, 0x6e, 0x7b, 0x6f, 0xb6, 0xf6, 0x89, 0x83,
+    0xd1, 0x9e, 0x08, 0x4b, 0x57, 0x4e, 0xd9, 0xf3, 0xe8, 0x81, 0x03, 0x5c, 0xd6, 0x6c, 0x2c, 0xea, 0x27, 0x2d, 0xfb,
+    0x39, 0xbb, 0x25, 0x81, 0xbb, 0x1a, 0xc3, 0xcb, 0xf5, 0x5e, 0x69, 0x1c, 0xa4, 0x8a, 0x0e, 0x4a, 0x69, 0xdf, 0xcd,
+    0x6c, 0xc7, 0xce, 0x48, 0xdb, 0x7a, 0x0b, 0xcb, 0x40, 0xc8, 0x59, 0x81, 0xde, 0x71, 0x3e, 0x0d, 0x41, 0xc9, 0xa2,
+    0x57, 0xae, 0xb7, 0x3f, 0x8b, 0x4e, 0x7c, 0xcb, 0xf9, 0xa5, 0xcb, 0xf8, 0xee, 0x52, 0xbe, 0x54, 0xa8, 0xef, 0x99,
+    0xb7, 0xa1, 0x0b, 0x77, 0xa2, 0xa7, 0x89, 0x47, 0x7f, 0x48, 0xaa, 0x02, 0x36, 0xbf, 0x9d, 0x97, 0xba, 0x43, 0x5e,
+    0x39, 0xa6, 0x99, 0x81, 0xde, 0xe4, 0x98, 0x06, 0x6a, 0xc8, 0x2c, 0x96, 0xf5, 0x51, 0x8c, 0x95, 0xd3, 0xe4, 0x2b,
+    0x94, 0x9a, 0x15, 0x71, 0x9f, 0xa4, 0x24, 0xfc, 0x92, 0x97, 0x18, 0xb7, 0x56, 0xe5, 0x59, 0xe1, 0x1a, 0x79, 0x3a,
+    0x47, 0x77, 0x92, 0xf5, 0x75, 0x42, 0xbd, 0x2d, 0x55, 0x05, 0xcf, 0xe8, 0xea, 0x64, 0x8b, 0xff, 0x30, 0xa1, 0x1e,
+    0x28, 0x2c, 0xa9, 0xaa, 0xd4, 0x19, 0x1d, 0x24, 0x7a, 0xcf, 0x5d, 0x39, 0xf2, 0xe3, 0xd2, 0xab, 0x26, 0x97, 0x35,
+    0xf6, 0x70, 0x8b, 0x09, 0x8b, 0x00, 0xb9, 0xb8, 0xa8, 0xb7, 0x78, 0xf1, 0x96, 0x03, 0xd2, 0x72, 0x46, 0x26, 0x82,
+    0x41, 0xce, 0xe3, 0x73, 0xb2, 0x31, 0x4f, 0x49, 0xc8, 0xa8, 0xcf, 0xcc, 0xb8, 0xcc, 0x5d, 0xab, 0xd1, 0x1e, 0xf5,
+    0x5a, 0x9a, 0x54, 0xaf, 0x15, 0xed, 0x5f, 0x96, 0x2b, 0x62, 0x0a, 0x4c, 0x67, 0x21, 0x98, 0xfd, 0x29, 0xf8, 0x12,
+    0x9d, 0xc2, 0x34, 0x4d, 0x70, 0x0e, 0x3b, 0x5e, 0xe3, 0x91, 0x58, 0x82, 0xa8, 0x9c, 0x7d, 0x11, 0xfb, 0x5d, 0x81,
+    0x0c, 0x0f, 0x9d, 0x84, 0xbb, 0xeb, 0x65, 0x1d, 0xeb, 0x6e, 0x18, 0x8e, 0x93, 0x70, 0xbb, 0x9d, 0xed, 0x58, 0xb2,
+    0x64, 0xf2, 0x7b, 0x8f, 0x05, 0xd8, 0xfa, 0x55, 0x50, 0xef, 0x7a, 0x49, 0x0d, 0xdf, 0xca, 0x63, 0xff, 0x41, 0x1d,
+    0x89, 0x79, 0xca, 0x8c, 0x1b, 0xbe, 0x75, 0x6f, 0x0e, 0x6b, 0x68, 0x8c, 0x5c, 0x93, 0xc8, 0xf3, 0x62, 0x0b, 0x68,
+    0xb1, 0x32, 0x2f, 0x1e, 0xda, 0xe5, 0x6d, 0x45, 0xaf, 0x3d, 0xa7, 0xaf, 0x81, 0x0f, 0xda, 0x82, 0x85, 0x94, 0x06,
+    0xc5, 0x3f, 0xf5, 0x73, 0x5f, 0xa4, 0x43, 0x5f, 0xb3, 0xac, 0x3d, 0x16, 0xe8, 0x6f, 0x84, 0xb3, 0xb6, 0x75, 0xf7,
+    0x13, 0x03, 0x46, 0x67, 0x87, 0x9a, 0xf1, 0x6c, 0x2e, 0x33, 0x33, 0x14, 0x85, 0x18, 0xe9, 0xd6, 0x1b, 0xee, 0x17,
+    0xe9, 0xe7, 0x6b, 0xd4, 0x46, 0xaf, 0x26, 0x55, 0x8d, 0xfc, 0x3a, 0xb4, 0x61, 0x1a, 0x9e, 0x2d, 0x85, 0xa2, 0x86,
+    0x8c, 0x92, 0xbd, 0x8d, 0x0e, 0x4b, 0x4e, 0x0d, 0xdf, 0x4a, 0xc6, 0x66, 0xcd, 0x28, 0xff, 0xc4, 0x44, 0xba, 0x39,
+    0x4a, 0x04, 0x43, 0xce, 0x95, 0x47, 0x99, 0x8c, 0x9b, 0xb7, 0x72, 0x48, 0xdd, 0x9b, 0x98, 0x4f, 0xd5, 0x18, 0x81,
+    0xb4, 0xef, 0xfa, 0x96, 0x54, 0x9b, 0xda, 0x73, 0xe2, 0xe0, 0x27, 0x2f, 0x10, 0x0f, 0xf9, 0x0e, 0x24, 0xb4, 0xd2,
+    0x39, 0xf7, 0x49, 0x8c, 0x5c, 0x05, 0x37, 0xdd, 0xa7, 0x73, 0xac, 0x16, 0x85, 0x71, 0x46, 0xd1, 0x6f, 0x7a, 0x25,
+    0xd2, 0x5c, 0x4e, 0x70, 0x26, 0x93, 0x36, 0x22, 0x5f, 0xe5, 0x42, 0x4e, 0x89, 0xf2, 0x4c, 0x55, 0x9b, 0xd1, 0xa5,
+    0xaf, 0x87, 0xd8, 0x7e, 0xe8, 0xdd, 0xb9, 0x47, 0xb3, 0xda, 0xf7, 0x98, 0x52, 0x73, 0x8b, 0x3c, 0x0b, 0xe7, 0xfa,
+    0x14, 0x7f, 0x9a, 0xa6, 0x8e, 0xf4, 0x7c, 0xad, 0x58, 0x11, 0x73, 0xe3, 0x3a, 0x56, 0x47, 0x9b, 0x95, 0x24, 0x68,
+    0x35, 0xa9, 0xd9, 0x6e, 0x5c, 0x4d, 0xe8, 0xa4, 0xb8, 0x80, 0x0b, 0x73, 0xc4, 0x0f, 0x87, 0x0c, 0xa1, 0xf4, 0x5a,
+    0x3c, 0xce, 0x3f, 0x30, 0x3d, 0xb5, 0xc1, 0x0b, 0x43, 0x2a, 0xb1, 0xbe, 0x6b, 0x12, 0xc4, 0x4b, 0xdb, 0xcb, 0x2f,
+    0x77, 0x8a, 0x3a, 0xba, 0xf4, 0xa3, 0x9b, 0x05, 0xee, 0x98, 0x50, 0x77, 0xfe, 0x82, 0x5b, 0x29, 0x6d, 0x7c, 0x0c,
+    0x4b, 0x41, 0xa2, 0x6a, 0xb2, 0x27, 0x32, 0xf1, 0x0c, 0x1d, 0xd7, 0x6c, 0x02, 0x4d, 0xbd, 0xf2, 0x5a, 0x66, 0xd3,
+    0xb5, 0x30, 0xab, 0x4b, 0x7e, 0x72, 0x77, 0x30, 0x42, 0xd7, 0x70, 0x05, 0x9f, 0xeb, 0x2f, 0x22, 0x7f, 0x49, 0x2d,
+    0x5d, 0xcf, 0x4b, 0x84, 0x0c, 0xa5, 0xb9, 0xe5, 0x49, 0xae, 0x54, 0x2c, 0x86, 0x53, 0x4c, 0x9c, 0x42, 0x29, 0x78,
+    0xf0, 0x0a, 0x8a, 0x36, 0x53, 0x4d, 0x2b, 0xc9, 0xe2, 0x69, 0x0e, 0x9a, 0x37, 0x0c, 0x91, 0x2d, 0xac, 0x2f, 0x43,
+    0x6a, 0xf1, 0xe9, 0xfb, 0xb4, 0x68, 0xec, 0x90, 0x00, 0xff, 0x32, 0xf8, 0x58, 0xab, 0xd1, 0x73, 0x9f, 0x77, 0x72,
+    0x22, 0xed, 0x64, 0xac, 0x7d, 0xd0, 0xa8, 0x1f, 0x01, 0x99, 0x9f, 0xfd, 0xa6, 0xcb, 0x62, 0xca, 0x65, 0xd8, 0xf8,
+    0x31, 0xf0, 0xc1, 0x5e, 0xef, 0xf1, 0x4d, 0x79, 0xa9, 0xfc, 0x8f, 0x57, 0xcb, 0xc1, 0xb7, 0x03, 0x30, 0xbb, 0xad,
+    0xdb, 0x88, 0xf7, 0xcc, 0xa1, 0x25, 0xfd, 0x37, 0x03, 0xc5, 0xdb, 0x7f, 0xb4, 0xe0, 0xe6, 0xa3, 0x7e, 0xa4, 0x52,
+    0x68, 0xa7, 0x2e, 0xe6, 0x1c, 0xea, 0x91, 0x48, 0x67, 0xbd, 0x3d, 0x6d, 0xcc, 0x09, 0x49, 0x17, 0x50, 0x16, 0xb5,
+    0x65, 0x63, 0xd4, 0x84, 0x2c, 0x3a, 0x5f, 0x6a, 0x3c, 0x66, 0xfa, 0x24, 0xaf, 0xd1, 0xfd, 0x18, 0x66, 0xe4, 0xe8,
+    0x3c, 0x6c, 0x74, 0xb6, 0xc5, 0x4c, 0xf8, 0xa8, 0x15, 0x3c, 0xd0, 0xb8, 0x4a, 0x53, 0x15, 0x4b, 0x1e, 0x56, 0x7f,
+    0xd8, 0x40, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0xfe, 0xe7, 0xdc, 0x03, 0xd1, 0x0f, 0xfd, 0x7c, 0xdc, 0xa1, 0x7e, 0x41, 0x2e, 0x50, 0x37, 0x77, 0x94, 0xb7, 0x4b,
+    0x90, 0x3b, 0x14, 0x38, 0xe0, 0x80, 0x03, 0x0e, 0x38, 0xe0, 0x80, 0xfb, 0xff, 0xba, 0xff, 0x00,
+};
+
+static const uint8_t STORED[] = {
+    0x01, 0x2c, 0x01, 0xd3, 0xfe, 0x65, 0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61, 0x20, 0x64,
+    0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61,
+    0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f,
+    0x74, 0x61, 0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65,
+    0x20, 0x6f, 0x74, 0x61, 0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70, 0x68, 0x6f,
+    0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61, 0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70,
+    0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61, 0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65,
+    0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61, 0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65,
+    0x20, 0x65, 0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61, 0x20, 0x64, 0x65, 0x66, 0x6c, 0x61,
+    0x74, 0x65, 0x20, 0x65, 0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61, 0x20, 0x64, 0x65, 0x66,
+    0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61, 0x20, 0x64,
+    0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61,
+    0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f,
+    0x74, 0x61, 0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70, 0x68, 0x6f, 0x6d, 0x65,
+    0x20, 0x6f, 0x74, 0x61, 0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70, 0x68, 0x6f,
+    0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61, 0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20, 0x65, 0x73, 0x70,
+    0x68, 0x6f, 0x6d, 0x65, 0x20, 0x6f, 0x74, 0x61, 0x20, 0x64, 0x65, 0x66, 0x6c, 0x61, 0x74, 0x65, 0x20,
+};
+
+static constexpr size_t WINDOW = 4096;
+static constexpr size_t PLAIN_SIZE = 16000;
+
+static uint8_t lcg_next(uint32_t &x) {
+  x = (x * 1103515245u + 12345u) & 0x7fffffffu;
+  return (x >> 16) & 0xff;
+}
+
+static std::vector<uint8_t> build_plain() {
+  std::vector<uint8_t> plain;
+  const char *text = "esphome ota deflate ";
+  for (int i = 0; i < 300; i++)
+    plain.insert(plain.end(), text, text + strlen(text));
+  uint32_t x = 1;
+  for (int i = 0; i < 3000; i++)
+    plain.push_back(lcg_next(x));
+  plain.insert(plain.end(), 5000, 0);
+  for (int i = 0; i < 100; i++)
+    plain.insert(plain.end(), text, text + strlen(text));
+  return plain;
+}
+
+// Mirrors the OTA session: chunked input through the read callback, window as output
+struct Session : OtaInflateState {
+  const uint8_t *in;
+  size_t in_len;
+  size_t in_pos;
+  size_t chunk;
+  std::vector<uint8_t> out;
+  uint8_t window[WINDOW];
+};
+
+static int read_cb(OtaInflateState *d) {
+  auto *s = static_cast<Session *>(d);
+  if (s->in_pos >= s->in_len)
+    return -1;
+  size_t n = std::min(s->chunk, s->in_len - s->in_pos);
+  d->source = s->in + s->in_pos + 1;
+  d->source_limit = s->in + s->in_pos + n;
+  s->in_pos += n;
+  return s->in[s->in_pos - n];
+}
+
+// Inflates the whole input; returns the decoder result and fills s.out
+static int inflate_all(Session &s, const uint8_t *in, size_t in_len, size_t chunk) {
+  s.in = in;
+  s.in_len = in_len;
+  s.in_pos = 0;
+  s.chunk = chunk;
+  s.out.clear();
+  memset(s.window, 0, sizeof(s.window));
+  ota_inflate_init(&s, s.window, WINDOW);
+  s.source_read_cb = read_cb;
+  int res;
+  do {
+    s.dest = s.window;
+    s.dest_limit = s.window + WINDOW;
+    res = ota_inflate(&s);
+    if (res < 0 || s.eof)
+      return res < 0 ? res : OTA_INFLATE_DATA_ERROR;
+    s.out.insert(s.out.end(), s.window, s.dest);
+    if (s.out.size() > PLAIN_SIZE)
+      return OTA_INFLATE_DATA_ERROR;
+  } while (res != OTA_INFLATE_DONE);
+  return res;
+}
+
+TEST(OtaInflate, RoundTripThroughWindow) {
+  auto s = std::make_unique<Session>();
+  ASSERT_EQ(inflate_all(*s, DEFLATED, sizeof(DEFLATED), 1040), OTA_INFLATE_DONE);
+  EXPECT_EQ(s->out, build_plain());
+  EXPECT_EQ(s->in_pos, sizeof(DEFLATED));
+}
+
+TEST(OtaInflate, SmallReadChunks) {
+  auto s = std::make_unique<Session>();
+  ASSERT_EQ(inflate_all(*s, DEFLATED, sizeof(DEFLATED), 7), OTA_INFLATE_DONE);
+  EXPECT_EQ(s->out, build_plain());
+}
+
+TEST(OtaInflate, StoredBlock) {
+  auto s = std::make_unique<Session>();
+  ASSERT_EQ(inflate_all(*s, STORED, sizeof(STORED), 64), OTA_INFLATE_DONE);
+  auto plain = build_plain();
+  plain.resize(300);
+  EXPECT_EQ(s->out, plain);
+}
+
+TEST(OtaInflate, TruncatedStreamFails) {
+  auto s = std::make_unique<Session>();
+  for (size_t cut : {size_t{1}, size_t{100}, size_t{1000}, sizeof(DEFLATED) - 1}) {
+    EXPECT_LT(inflate_all(*s, DEFLATED, cut, 1040), 0) << "cut at " << cut;
+    EXPECT_LE(s->out.size(), PLAIN_SIZE);
+  }
+}
+
+TEST(OtaInflate, TruncatedStoredBlockFails) {
+  auto s = std::make_unique<Session>();
+  EXPECT_LT(inflate_all(*s, STORED, sizeof(STORED) - 50, 64), 0);
+}
+
+TEST(OtaInflate, CorruptStreamsNeverEscapeTheWindow) {
+  // Flipped bytes and garbage; the sanitizers check the decoder stays in bounds
+  auto s = std::make_unique<Session>();
+  std::vector<uint8_t> bad(DEFLATED, DEFLATED + sizeof(DEFLATED));
+  // A coarse, non-aligned stride: neighbouring offsets hit the same paths
+  for (size_t i = 0; i < bad.size(); i += 29) {
+    bad[i] ^= 0x5a;
+    inflate_all(*s, bad.data(), bad.size(), 1040);
+    bad[i] ^= 0x5a;
+  }
+  uint32_t x = 99;
+  std::vector<uint8_t> garbage(2000);
+  for (int round = 0; round < 50; round++) {
+    for (auto &b : garbage)
+      b = lcg_next(x);
+    inflate_all(*s, garbage.data(), garbage.size(), 1040);
+  }
+}
+
+}  // namespace esphome::testing
@@ -28,6 +28,11 @@ void setup() {

  ::testing::InitGoogleTest();
  int exit_code = RUN_ALL_TESTS();
+  // A test folder that never reached the build would otherwise pass as an empty run
+  if (::testing::UnitTest::GetInstance()->total_test_count() == 0) {
+    fprintf(stderr, "No tests were linked into this binary\n");
+    exit_code = 1;
+  }
  exit(exit_code);
 }

@@ -0,0 +1 @@
+<<: !include common.yaml
@@ -14,7 +14,7 @@ struct MinimalBackend {
  OTAResponseTypes write(uint8_t *data, size_t len) { return OTA_RESPONSE_OK; }
  OTAResponseTypes end() { return OTA_RESPONSE_OK; }
  void abort() {}
-  bool supports_compression() { return false; }
+  static constexpr bool supports_compression() { return false; }
 };
 static_assert(OTABackendContract<MinimalBackend>);

@@ -0,0 +1,9 @@
+esphome:
+  name: host-ota-test
+host:
+api:
+ota:
+  - platform: esphome
+    port: __OTA_PORT__
+logger:
+  level: DEBUG
@@ -15,6 +15,7 @@ from dataclasses import dataclass
 import functools
 from pathlib import Path
 import socket
+import zlib

 import pytest

@@ -123,6 +124,7 @@ class _Device:
    binary_path: Path
    proc: asyncio.subprocess.Process | None = None
    reboots: int = 0
+    inflates: int = 0

    def __post_init__(self) -> None:
        self._rebooted = asyncio.Event()
@@ -131,6 +133,8 @@ class _Device:
        if "Rebooting safely" in line:
            self.reboots += 1
            self._rebooted.set()
+        if "Inflated " in line and " bytes from " in line:
+            self.inflates += 1

    async def wait_reboot(self, count: int, timeout: float = 10.0) -> None:
        async with asyncio.timeout(timeout):
@@ -241,6 +245,80 @@ async def test_host_ota_self_update(
        await dev.ota(None, None, "second OTA failed -- listener leaked across execv")


+@pytest.mark.asyncio
+async def test_host_ota_deflate(
+    yaml_config: str,
+    write_yaml_config: ConfigWriter,
+    compile_esphome: CompileFunction,
+    reserved_tcp_port: tuple[int, socket.socket],
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """Deflate is negotiated by default, an old client gets an uncompressed
+    upload, and a corrupt stream is rejected without taking the device down."""
+    dev = _Device(
+        *await _build(
+            yaml_config, write_yaml_config, compile_esphome, reserved_tcp_port
+        )
+    )
+    errors: list[str] = []
+
+    def on_log(line: str) -> None:
+        # A corrupt stream is caught by the decoder, by the size check or by
+        # the MD5 at the end, depending on where the damage lands
+        if any(
+            text in line
+            for text in ("Inflate err", "Inflate overrun", "End update err")
+        ):
+            errors.append(line)
+        dev.on_log(line)
+
+    real_compress = zlib.compress
+
+    def corrupt_compress(data: bytes, *args: object, **kwargs: object) -> bytes:
+        # Reserved block type in the first header: rejected by the decoder on
+        # every build, unlike a flipped data bit that may only fail the MD5
+        out = bytearray(real_compress(data, *args, **kwargs))
+        out[0] |= 0x06
+        return bytes(out)
+
+    def overlong_compress(data: bytes, *args: object, **kwargs: object) -> bytes:
+        """A stream that inflates past the size the client announced."""
+        return real_compress(data + bytes(8192), *args, **kwargs)
+
+    async with run_binary(dev.binary_path, line_callback=on_log) as (proc, _lines):
+        dev.proc = proc
+        await _wait_for_port(LOCALHOST, dev.api_port, PORT_WAIT_TIMEOUT)
+
+        # Default: the host backend cannot store gzip, so the CLI sends deflate
+        await dev.ota(None, None, "deflate upload failed")
+        assert dev.inflates == 1, "device did not inflate the upload"
+
+        # A client that does not offer deflate is served uncompressed
+        with monkeypatch.context() as m:
+            m.setattr(espota2, "CLIENT_FEATURE_SUPPORTS_DEFLATE", 0)
+            await dev.ota(None, None, "uncompressed upload failed")
+        assert dev.inflates == 1, "device inflated without a client offer"
+
+        # A corrupt stream fails the upload and leaves the device running
+        with monkeypatch.context() as m:
+            m.setattr(zlib, "compress", corrupt_compress)
+            await dev.refused_ota(None, None, "corrupt deflate stream was accepted")
+        assert errors, "device did not report the corrupt stream"
+
+        # So does a stream that inflates past the announced image size
+        errors.clear()
+        with monkeypatch.context() as m:
+            m.setattr(zlib, "compress", overlong_compress)
+            await dev.refused_ota(None, None, "overlong deflate stream was accepted")
+        assert any("Inflate overrun" in line for line in errors), (
+            "device wrote past the announced size"
+        )
+
+        # and it still takes a good upload afterwards
+        await dev.ota(None, None, "upload after a rejected stream failed")
+        assert dev.inflates == 2
+
+
@pytest.mark.asyncio
 async def test_host_ota_encrypted(
    yaml_config: str,
@@ -12,6 +12,7 @@ from pathlib import Path
 import socket
 import struct
 from unittest.mock import Mock, call, patch
+import zlib

 import pytest
 from pytest import CaptureFixture
@@ -354,6 +355,7 @@ def test_perform_ota_successful_md5_auth(
                espota2.CLIENT_FEATURE_SUPPORTS_COMPRESSION
                | espota2.CLIENT_FEATURE_SUPPORTS_SHA256_AUTH
                | espota2.CLIENT_FEATURE_SUPPORTS_EXTENDED_PROTOCOL
+                | espota2.CLIENT_FEATURE_SUPPORTS_DEFLATE
            ]
        )
    )
@@ -601,12 +603,16 @@ def test_perform_ota_upload_error(mock_socket: Mock, mock_file: io.BytesIO) -> N
        espota2.perform_ota(mock_socket, None, mock_file, "test.bin")


-def _no_auth_handshake(version: int) -> list[bytes]:
+def _no_auth_handshake(version: int, server_features: int | None = None) -> list[bytes]:
    """Recv responses for a handshake without auth, up to the MD5 check."""
+    if server_features is None:
+        features = [bytes([espota2.RESPONSE_HEADER_OK])]
+    else:
+        features = [bytes([espota2.RESPONSE_FEATURE_FLAGS]), bytes([server_features])]
    return [
        bytes([espota2.RESPONSE_OK]),  # First byte of version response
        bytes([version]),  # Version number
-        bytes([espota2.RESPONSE_HEADER_OK]),  # Features response
+        *features,
        bytes([espota2.RESPONSE_AUTH_OK]),  # No auth required
        bytes([espota2.RESPONSE_UPDATE_PREPARE_OK]),  # Binary size OK
        bytes([espota2.RESPONSE_BIN_MD5_OK]),  # MD5 checksum OK
@@ -1054,6 +1060,7 @@ def test_perform_ota_successful_sha256_auth(
                espota2.CLIENT_FEATURE_SUPPORTS_COMPRESSION
                | espota2.CLIENT_FEATURE_SUPPORTS_SHA256_AUTH
                | espota2.CLIENT_FEATURE_SUPPORTS_EXTENDED_PROTOCOL
+                | espota2.CLIENT_FEATURE_SUPPORTS_DEFLATE
            ]
        )
    )
@@ -1110,6 +1117,7 @@ def test_perform_ota_sha256_fallback_to_md5(
                espota2.CLIENT_FEATURE_SUPPORTS_COMPRESSION
                | espota2.CLIENT_FEATURE_SUPPORTS_SHA256_AUTH
                | espota2.CLIENT_FEATURE_SUPPORTS_EXTENDED_PROTOCOL
+                | espota2.CLIENT_FEATURE_SUPPORTS_DEFLATE
            ]
        )
    )
@@ -1219,6 +1227,7 @@ def test_perform_ota_extended_protocol_app(
                espota2.CLIENT_FEATURE_SUPPORTS_COMPRESSION
                | espota2.CLIENT_FEATURE_SUPPORTS_SHA256_AUTH
                | espota2.CLIENT_FEATURE_SUPPORTS_EXTENDED_PROTOCOL
+                | espota2.CLIENT_FEATURE_SUPPORTS_DEFLATE
            ]
        )
    )
@@ -1279,6 +1288,7 @@ def test_perform_ota_successful_partition_table(
                espota2.CLIENT_FEATURE_SUPPORTS_COMPRESSION
                | espota2.CLIENT_FEATURE_SUPPORTS_SHA256_AUTH
                | espota2.CLIENT_FEATURE_SUPPORTS_EXTENDED_PROTOCOL
+                | espota2.CLIENT_FEATURE_SUPPORTS_DEFLATE
            ]
        )
    )
@@ -1507,3 +1517,40 @@ def test_check_error_passes_non_error_when_expect_is_none() -> None:
    espota2.check_error([espota2.RESPONSE_OK], None)
    espota2.check_error([espota2.RESPONSE_HEADER_OK], None)
    espota2.check_error([espota2.RESPONSE_FEATURE_FLAGS], None)
+
+
+# Device replies after the MD5 check for a one-chunk upload
+_UPLOAD_TAIL = [
+    bytes([espota2.RESPONSE_CHUNK_OK]),
+    bytes([espota2.RESPONSE_RECEIVE_OK]),
+    bytes([espota2.RESPONSE_UPDATE_END_OK]),
+]
+
+
+@pytest.mark.usefixtures("mock_time")
+@pytest.mark.parametrize(
+    "server_features",
+    [
+        espota2.SERVER_FEATURE_SUPPORTS_DEFLATE,
+        # Binding offer: deflate wins over gzip
+        espota2.SERVER_FEATURE_SUPPORTS_DEFLATE
+        | espota2.SERVER_FEATURE_SUPPORTS_COMPRESSION,
+    ],
+)
+def test_perform_ota_with_deflate(mock_socket: Mock, server_features: int) -> None:
+    """The device gets a raw deflate stream, both sizes and the image MD5."""
+    original_content = b"firmware" * 100
+    mock_socket.recv.side_effect = (
+        _no_auth_handshake(espota2.OTA_VERSION_2_0, server_features) + _UPLOAD_TAIL
+    )
+
+    espota2.perform_ota(mock_socket, None, io.BytesIO(original_content), "test.bin")
+
+    sent = [c[0][0] for c in mock_socket.sendall.call_args_list]
+    # magic, features, ota type, size, image size, md5, data, end ack
+    sent_size = struct.unpack(">I", sent[3])[0]
+    assert sent[4] == len(original_content).to_bytes(espota2.SIZE_FIELD_BYTES, "big")
+    payload = sent[6]
+    assert len(payload) == sent_size < len(original_content)
+    assert zlib.decompress(payload, -espota2.DEFLATE_WINDOW_BITS) == original_content
+    assert sent[5] == hashlib.md5(original_content).hexdigest().encode()