diff --git a/tests/components/esphome/__init__.py b/tests/components/esphome/__init__.py new file mode 100644 index 0000000000..80bdc5c4a5 --- /dev/null +++ b/tests/components/esphome/__init__.py @@ -0,0 +1,13 @@ +from esphome.loader import FileResource +from tests.testing_helpers import ComponentManifestOverride + + +def override_manifest(manifest: ComponentManifestOverride) -> None: + # to_code must run: it emits the component count the application needs + manifest.enable_codegen() + # The deflate decoder lives with the ota platform, which is not part of + # this build; only the decoder itself is under test here + manifest.resources = manifest.resources + [ + FileResource("esphome.components.esphome", "ota/ota_esphome_inflate.c"), + FileResource("esphome.components.esphome", "ota/ota_esphome_inflate.h"), + ] diff --git a/tests/components/esphome/test_ota_inflate.cpp b/tests/components/esphome/test_ota_inflate.cpp new file mode 100644 index 0000000000..1beb99fa59 --- /dev/null +++ b/tests/components/esphome/test_ota_inflate.cpp @@ -0,0 +1,330 @@ +#include + +#include +#include +#include + +#include "esphome/components/esphome/ota/ota_esphome_inflate.h" + +namespace esphome::testing { + +// The plaintext below, as built by build_plain(): repeated text, a pseudo random +// run, a zero run and the text again, so literals, short and long back references +// and stored data are all exercised across the 4 KB window. +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, 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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, +}; + +// The first 300 bytes of the same plaintext as a stored (uncompressed) block +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 std::vector build_plain() { + std::vector 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++) { + x = (x * 1103515245u + 12345u) & 0x7fffffffu; + plain.push_back((x >> 16) & 0xff); + } + 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: the state is the base, input arrives through the +// read callback in chunks, the window doubles as the output buffer. +struct Session : OtaInflateState { + const uint8_t *in; + size_t in_len; + size_t in_pos; + size_t chunk; + std::vector out; + size_t out_limit; + uint8_t window[WINDOW]; +}; + +static int read_cb(OtaInflateState *d) { + auto *s = static_cast(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, size_t out_limit) { + s.in = in; + s.in_len = in_len; + s.in_pos = 0; + s.chunk = chunk; + s.out.clear(); + s.out_limit = out_limit; + 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() > s.out_limit) + return OTA_INFLATE_DATA_ERROR; + } while (res != OTA_INFLATE_DONE); + return res; +} + +TEST(OtaInflate, RoundTripThroughWindow) { + auto s = std::make_unique(); + ASSERT_EQ(inflate_all(*s, DEFLATED, sizeof(DEFLATED), 1040, PLAIN_SIZE), OTA_INFLATE_DONE); + EXPECT_EQ(s->out, build_plain()); + EXPECT_EQ(s->in_pos, sizeof(DEFLATED)); +} + +TEST(OtaInflate, SmallReadChunks) { + auto s = std::make_unique(); + ASSERT_EQ(inflate_all(*s, DEFLATED, sizeof(DEFLATED), 7, PLAIN_SIZE), OTA_INFLATE_DONE); + EXPECT_EQ(s->out, build_plain()); +} + +TEST(OtaInflate, StoredBlock) { + auto s = std::make_unique(); + ASSERT_EQ(inflate_all(*s, STORED, sizeof(STORED), 64, PLAIN_SIZE), OTA_INFLATE_DONE); + auto plain = build_plain(); + plain.resize(300); + EXPECT_EQ(s->out, plain); +} + +TEST(OtaInflate, TruncatedStreamFails) { + auto s = std::make_unique(); + for (size_t cut : {size_t{1}, size_t{100}, size_t{1000}, sizeof(DEFLATED) - 1}) { + EXPECT_LT(inflate_all(*s, DEFLATED, cut, 1040, PLAIN_SIZE), 0) << "cut at " << cut; + EXPECT_LE(s->out.size(), PLAIN_SIZE); + } +} + +TEST(OtaInflate, TruncatedStoredBlockFails) { + auto s = std::make_unique(); + EXPECT_LT(inflate_all(*s, STORED, sizeof(STORED) - 50, 64, PLAIN_SIZE), 0); +} + +TEST(OtaInflate, CorruptStreamsNeverEscapeTheWindow) { + // Every byte of the stream flipped in turn, plus pseudo random garbage: the + // decoder must fail or finish without ever reading or writing out of bounds + // (the sanitizers check that) and without producing more than announced. + auto s = std::make_unique(); + std::vector bad(DEFLATED, DEFLATED + sizeof(DEFLATED)); + for (size_t i = 0; i < bad.size(); i += 3) { + bad[i] ^= 0x5a; + int res = inflate_all(*s, bad.data(), bad.size(), 1040, PLAIN_SIZE); + EXPECT_TRUE(res < 0 || res == OTA_INFLATE_DONE); + bad[i] ^= 0x5a; + } + uint32_t x = 99; + std::vector garbage(2000); + for (int round = 0; round < 50; round++) { + for (auto &b : garbage) { + x = (x * 1103515245u + 12345u) & 0x7fffffffu; + b = (x >> 16) & 0xff; + } + int res = inflate_all(*s, garbage.data(), garbage.size(), 1040, PLAIN_SIZE); + EXPECT_TRUE(res < 0 || res == OTA_INFLATE_DONE); + } +} + +} // namespace esphome::testing