Close the RSBK name-collision class: ASCII case folding, UTF-8 well-formedness, nested-path traversal
All three are format-locked and validated on encode and decode. Repeated known keys now reject at the root and inside an entry rather than last-wins.
This commit is contained in:
@@ -142,9 +142,7 @@ static void testEncodeRefusesWhatManifestRefuses() {
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m.entries[0].fileName = "../evil.wav";
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CHECK(!encodePackage(m).has_value());
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// A zero-length entry cannot round-trip through the shell's filesystem
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// seam (src/shell/package's appendPayload refuses an empty payload) — the
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// format layer must never produce one.
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// See src/core/package/CLAUDE.md for the shell seam that forces this.
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PackageManifest zeroLen = fixture(1, 1);
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zeroLen.entries[1].byteLength = 0;
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CHECK(!encodePackage(zeroLen).has_value());
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@@ -185,6 +183,41 @@ static void testTruncationAtEveryByteOffsetIsMalformed() {
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CHECK(decodePackage(file, file.size() - 1).status == PackageReadability::Malformed);
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}
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// --- header defaults ---------------------------------------------------------
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// The 0/0 defaults are not the current ladder pair, so a header that never
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// parsed cannot be mistaken for a plausible 1/1. They mean "unset", NOT "the
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// decode failed": a decode that got past the header reports the real pair
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// alongside its Malformed verdict.
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static void testHeaderDefaultsMeanUnparsed() {
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CHECK(PackageHeader{}.formatVersion == 0);
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CHECK(PackageHeader{}.minReaderVersion == 0);
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CHECK(PackageHeader{}.writerVersion.empty());
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// Failed before the header: bad magic, and a semver truncated mid-string.
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std::vector<std::uint8_t> badMagic = rawHeader(1, 1, "1.0.0");
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appendManifest(badMagic, "{}");
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badMagic[0] = 'Z';
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const DecodedPackage magic = decodePackage(badMagic, badMagic.size());
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CHECK(magic.status == PackageReadability::Malformed);
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CHECK(magic.header == PackageHeader{});
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std::vector<std::uint8_t> cutSemver = rawHeader(1, 1, "1.0.0");
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cutSemver.resize(18);
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CHECK(decodePackage(cutSemver, cutSemver.size()).header == PackageHeader{});
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// Failed after it: a same-version package with a corrupt manifest is
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// Malformed, and its header is fully populated.
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std::vector<std::uint8_t> corrupt =
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rawHeader(kPackageFormatVersion, kPackageMinReaderVersion, "1.0.0");
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appendManifest(corrupt, "not json");
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const DecodedPackage late = decodePackage(corrupt, corrupt.size());
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CHECK(late.status == PackageReadability::Malformed);
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CHECK(late.header.formatVersion == kPackageFormatVersion);
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CHECK(late.header.minReaderVersion == kPackageMinReaderVersion);
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CHECK(late.header.writerVersion == "1.0.0");
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}
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// --- version ladder: TooNew refuses whole ------------------------------------
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static void testTooNewProducesNoManifest() {
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@@ -365,6 +398,7 @@ int main() {
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testEncodeDecodeRoundTrip();
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testEncodeRefusesWhatManifestRefuses();
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testTruncationAtEveryByteOffsetIsMalformed();
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testHeaderDefaultsMeanUnparsed();
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testTooNewProducesNoManifest();
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testAdditiveUnparseableManifestIsTooNew();
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testNewerAdditiveFormatReads();
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@@ -1,7 +1,7 @@
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// Standalone tests for reasampler::package's format contract — no REAPER, no
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// test framework. Pins the version-ladder classification (both integers, every
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// branch) and the entry-name rule that makes path expression structurally
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// impossible in a package.
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// branch) and the three naming rules: the entry-name rule, the ASCII-folding
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// name equivalence, and the nested-path traversal guard.
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#include "../src/core/package/package_format.h"
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@@ -111,8 +111,110 @@ static void testEntryNameRejectsWindowsHostileNames() {
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CHECK(!isValidEntryName("COM1"));
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CHECK(!isValidEntryName("com1.txt"));
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CHECK(!isValidEntryName("LPT1"));
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// Not a device name: a real filename that merely starts with one.
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// The superscript device forms (COM¹ COM² COM³ LPT¹ LPT² LPT³ in UTF-8):
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// Windows reads those as digits in a device name, so "COM².wav" is COM2.
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CHECK(!isValidEntryName("COM\xC2\xB9.wav"));
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CHECK(!isValidEntryName("com\xC2\xB2"));
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CHECK(!isValidEntryName("COM\xC2\xB3.wav"));
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CHECK(!isValidEntryName("LPT\xC2\xB9"));
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CHECK(!isValidEntryName("lpt\xC2\xB2.txt"));
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CHECK(!isValidEntryName("LPT\xC2\xB3.wav"));
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// Not a device name: a real filename that merely starts with one, and the
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// zero forms, which Windows does not reserve.
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CHECK(isValidEntryName("console.wav"));
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CHECK(isValidEntryName("COM0.wav"));
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CHECK(isValidEntryName("LPT0"));
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// Nor does a superscript past 3 name a device.
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CHECK(isValidEntryName("COM\xE2\x81\xB4.wav")); // U+2074 SUPERSCRIPT FOUR
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}
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// --- isValidEntryName: UTF-8 well-formedness ---------------------------------
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static void testEntryNameAcceptsWellFormedUtf8() {
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CHECK(isValidEntryName("caf\xC3\xA9.wav")); // 2-byte: é
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CHECK(isValidEntryName("\xE2\x99\xAA.wav")); // 3-byte: ♪
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CHECK(isValidEntryName("\xF0\x9F\x8E\xB5.wav")); // 4-byte: 🎵
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CHECK(isValidEntryName("\xEF\xBB\xBF.wav")); // U+FEFF, ugly but well-formed
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CHECK(isValidEntryName("\xF4\x8F\xBF\xBF.wav")); // U+10FFFF, the last code point
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}
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static void testEntryNameRejectsIllFormedUtf8() {
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// Two names differing ONLY in their invalid bytes: a host converting to
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// UTF-16 substitutes U+FFFD for both by default, collapsing them onto one
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// file — the duplicate-name collision the manifest cannot otherwise see.
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CHECK(!isValidEntryName("a\x80.wav")); // stray continuation byte
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CHECK(!isValidEntryName("a\x81.wav"));
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// Structural: truncated sequences (a lead byte the name ends inside).
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CHECK(!isValidEntryName("a\xC3"));
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CHECK(!isValidEntryName("a\xE2\x99"));
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CHECK(!isValidEntryName("a\xF0\x9F\x8E"));
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// A lead byte followed by a non-continuation.
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CHECK(!isValidEntryName("a\xC3\x41.wav"));
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// Overlong encodings: an alternate spelling of an ASCII byte we ban.
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CHECK(!isValidEntryName("a\xC0\xAF.wav")); // overlong '/'
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CHECK(!isValidEntryName("a\xC0\x80.wav")); // overlong NUL
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CHECK(!isValidEntryName("a\xE0\x80\xAF.wav")); // overlong '/', 3-byte
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CHECK(!isValidEntryName("a\xF0\x80\x80\xAF.wav")); // overlong '/', 4-byte
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// Surrogate halves: no code point, and unrepresentable in UTF-16.
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CHECK(!isValidEntryName("a\xED\xA0\x80.wav")); // U+D800
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CHECK(!isValidEntryName("a\xED\xBF\xBF.wav")); // U+DFFF
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// Past U+10FFFF, and the 5/6-byte leads that never encode anything.
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CHECK(!isValidEntryName("a\xF4\x90\x80\x80.wav")); // U+110000
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CHECK(!isValidEntryName("a\xF5\x80\x80\x80.wav"));
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CHECK(!isValidEntryName("a\xFC\x80\x80\x80\x80\x80.wav"));
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CHECK(!isValidEntryName("a\xFF.wav"));
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}
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// --- sameEntryName -----------------------------------------------------------
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static void testSameEntryNameFoldsAsciiCase() {
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// A bank authored on a case-sensitive filesystem produces this pair
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// honestly; Windows and default APFS would extract both onto one file.
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CHECK(sameEntryName("Kick.wav", "kick.wav"));
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CHECK(sameEntryName("KICK.WAV", "kick.wav"));
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CHECK(sameEntryName("kick.wav", "kick.wav"));
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CHECK(!sameEntryName("kick.wav", "snare.wav"));
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CHECK(!sameEntryName("kick.wav", "kick.wave")); // length alone decides
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CHECK(!sameEntryName("", "a"));
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CHECK(sameEntryName("", ""));
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// ASCII only: "é" vs "É" are two names here (the NFC/NFD limitation this
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// shares — see this directory's CLAUDE.md).
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CHECK(!sameEntryName("caf\xC3\xA9.wav", "caf\xC3\x89.wav"));
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// Only the letters fold — the bytes flanking the ASCII range must not.
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CHECK(!sameEntryName("a[b", "a{b")); // 0x5B vs 0x7B, 'Z'+1 and 'z'+1
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CHECK(!sameEntryName("a@b", "a`b")); // 0x40 vs 0x60, 'A'-1 and 'a'-1
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}
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// --- isValidNestedSamplePath -------------------------------------------------
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static void testNestedSamplePathAcceptsRelative() {
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CHECK(isValidNestedSamplePath("a.wav"));
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CHECK(isValidNestedSamplePath("reasampler_bank/kick.wav"));
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CHECK(isValidNestedSamplePath("reasampler_bank\\kick.wav"));
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CHECK(isValidNestedSamplePath("deep/dir/tree/a.wav"));
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// A ".." that is not a whole component is an ordinary name.
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CHECK(isValidNestedSamplePath("take..final/a.wav"));
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CHECK(isValidNestedSamplePath("bank/..hidden"));
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CHECK(isValidNestedSamplePath("a..b"));
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}
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static void testNestedSamplePathRejectsTraversalAndAbsolute() {
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// BankModel::add catches only the absolute forms, so traversal reaches the
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// format unless this rule stops it.
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CHECK(!isValidNestedSamplePath(".."));
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CHECK(!isValidNestedSamplePath("../evil.wav"));
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CHECK(!isValidNestedSamplePath("..\\evil.wav"));
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CHECK(!isValidNestedSamplePath("bank/../../evil.wav"));
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CHECK(!isValidNestedSamplePath("bank\\..\\evil.wav"));
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CHECK(!isValidNestedSamplePath("bank/.."));
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CHECK(!isValidNestedSamplePath("bank/../"));
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// Everything util::isAbsolutePath already catches.
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CHECK(!isValidNestedSamplePath("/rooted.wav"));
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CHECK(!isValidNestedSamplePath("\\rooted.wav"));
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CHECK(!isValidNestedSamplePath("C:/abs.wav"));
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CHECK(!isValidNestedSamplePath("C:\\abs.wav"));
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CHECK(!isValidNestedSamplePath("c:relative-to-drive.wav"));
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CHECK(!isValidNestedSamplePath("\\\\server\\share.wav"));
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}
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int main() {
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@@ -123,6 +225,11 @@ int main() {
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testEntryNameRejectsSeparatorsAndDots();
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testEntryNameRejectsAbsolutePrefixes();
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testEntryNameRejectsWindowsHostileNames();
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testEntryNameAcceptsWellFormedUtf8();
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testEntryNameRejectsIllFormedUtf8();
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testSameEntryNameFoldsAsciiCase();
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testNestedSamplePathAcceptsRelative();
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testNestedSamplePathRejectsTraversalAndAbsolute();
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if (g_fail == 0) {
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std::printf("package_format_tests: all passed\n");
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+118
-21
@@ -1,7 +1,7 @@
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// Standalone tests for reasampler::package's manifest codec — no REAPER, no
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// test framework. The round-trip fixture exercises every manifest field and
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// every Sample optional in both present and absent states; the rejection suite
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// pins the entry-name rule on encode AND decode.
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// pins the naming, case-folding and traversal rules on encode AND decode.
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#include "../src/core/package/package_manifest.h"
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@@ -132,16 +132,58 @@ static void testEncodeRejectsBadEntryName() {
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}
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}
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// One entry, `name` spliced in as raw manifest text so a hostile spelling
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// (escapes included) is expressible — a package is not limited to what encode
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// emits.
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static std::string oneEntryJson(const std::string& name,
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const std::string& relativePath = "bank/a.wav") {
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return "{\"entries\":[{\"name\":\"" + name +
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"\",\"length\":1,\"hash\":\"h\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s1\","
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"\"relativePath\":\"" + relativePath + "\"}]}}]}";
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}
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static void testDecodeRejectsBadEntryName() {
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for (const char* bad : {"..\\\\evil.wav", "../evil.wav", "dir/a.wav", "C:\\\\a.wav", ".."}) {
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// Hand-rolled JSON: a hostile package is not limited to what encode emits.
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std::string json =
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std::string("{\"entries\":[{\"name\":\"") + bad +
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"\",\"length\":1,\"hash\":\"h\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s1\","
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"\"relativePath\":\"bank/a.wav\"}]}}]}";
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CHECK(!deserializeManifest(json).has_value());
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}
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for (const char* bad : {"..\\\\evil.wav", "../evil.wav", "dir/a.wav", "C:\\\\a.wav", ".."})
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CHECK(!deserializeManifest(oneEntryJson(bad)).has_value());
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// The rest of the rule set through decode — the direction that matters,
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// since a package can arrive from anywhere.
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CHECK(!deserializeManifest(oneEntryJson("CON.wav")).has_value()); // DOS device
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CHECK(!deserializeManifest(oneEntryJson("COM\xC2\xB2.wav")).has_value()); // COM²
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CHECK(!deserializeManifest(oneEntryJson("a.wav ")).has_value()); // trailing space
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CHECK(!deserializeManifest(oneEntryJson("a.wav.")).has_value()); // trailing dot
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CHECK(!deserializeManifest(oneEntryJson("a*b.wav")).has_value()); // reserved char
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// A NUL smuggled in as a JSON escape: the manifest text is legal, the
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// decoded name is not.
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CHECK(!deserializeManifest(oneEntryJson("a\\u0000b.wav")).has_value());
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// Ill-formed UTF-8 as raw bytes.
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CHECK(!deserializeManifest(oneEntryJson("a\xC3.wav")).has_value());
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// A lone surrogate never reaches the name rule — the JSON reader refuses
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// the unpaired \uD800 first. Pinned so that refusal cannot silently become
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// "decoded to U+FFFD and accepted".
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CHECK(!deserializeManifest(oneEntryJson("a\\ud800b.wav")).has_value());
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}
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static void testDecodeRejectsTraversalInNestedPath() {
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// The one field in the format that CAN express a path. BankModel::add
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// catches the absolute forms only, so ".." arrives unless the package layer
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// refuses it.
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CHECK(!deserializeManifest(oneEntryJson("a.wav", "../../evil.wav")).has_value());
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CHECK(!deserializeManifest(oneEntryJson("a.wav", "bank/../evil.wav")).has_value());
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CHECK(!deserializeManifest(oneEntryJson("a.wav", "..")).has_value());
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// A ".." that is not a whole component still reads.
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CHECK(deserializeManifest(oneEntryJson("a.wav", "take..final/a.wav")).has_value());
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}
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static void testEncodeRejectsTraversalInNestedPath() {
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PackageManifest m = fixture();
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m.entries[0].sample.relativePath = "../../evil.wav";
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CHECK(!serializeManifest(m).has_value());
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PackageManifest m2 = fixture();
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m2.entries[0].sample.relativePath = "bank/../evil.wav";
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CHECK(!serializeManifest(m2).has_value());
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}
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static void testDuplicateEntryNamesRejectedBothWays() {
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@@ -149,40 +191,92 @@ static void testDuplicateEntryNamesRejectedBothWays() {
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m.entries[1].fileName = m.entries[0].fileName;
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CHECK(!serializeManifest(m).has_value());
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// Case-folded: two names one case-insensitive filesystem extracts onto a
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// single file are one name here too, in both directions.
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PackageManifest folded = fixture();
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folded.entries[1].fileName = "KICK.WAV"; // entries[0] is "kick.wav"
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CHECK(!serializeManifest(folded).has_value());
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// Decode side, from a hand-built duplicate (a hostile package is not
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// limited to what encode emits).
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const std::string dup =
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"{\"entries\":["
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"{\"name\":\"a.wav\",\"length\":1,\"hash\":\"h\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s1\",\"relativePath\":\"p\"}]}},"
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"{\"name\":\"a.wav\",\"length\":2,\"hash\":\"i\","
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"{\"name\":\"A.WAV\",\"length\":2,\"hash\":\"i\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s2\",\"relativePath\":\"q\"}]}}]}";
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CHECK(!deserializeManifest(dup).has_value());
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// Two names that differ outside the ASCII letters are still two names.
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const std::string distinct =
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"{\"entries\":["
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"{\"name\":\"a1.wav\",\"length\":1,\"hash\":\"h\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s1\",\"relativePath\":\"p\"}]}},"
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"{\"name\":\"a2.wav\",\"length\":2,\"hash\":\"i\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s2\",\"relativePath\":\"q\"}]}}]}";
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CHECK(deserializeManifest(distinct).has_value());
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}
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static void testDuplicateEntriesKeyRejected() {
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// A repeated "entries" key must not accumulate into two arrays' worth of
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// entries — reject rather than silently union them.
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const std::string json =
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static void testRepeatedRootKeyRejected() {
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// A repeated "entries" must not accumulate into two arrays' worth of
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// entries; the other three assign rather than append, but "which duplicate
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// keys are legal" is one format answer, not four.
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const std::string entriesTwice =
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"{\"entries\":[{\"name\":\"a.wav\",\"length\":1,\"hash\":\"h\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s1\",\"relativePath\":\"p\"}]}}],"
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"\"entries\":[{\"name\":\"b.wav\",\"length\":1,\"hash\":\"h\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s2\",\"relativePath\":\"q\"}]}}]}";
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CHECK(!deserializeManifest(json).has_value());
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CHECK(!deserializeManifest(entriesTwice).has_value());
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CHECK(!deserializeManifest("{\"bankName\":\"A\",\"bankName\":\"B\"}").has_value());
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CHECK(!deserializeManifest("{\"exported\":1,\"exported\":2}").has_value());
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CHECK(!deserializeManifest("{\"slots\":[],\"slots\":[]}").has_value());
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// Unknown keys stay repeatable: they are skipped, and a future format must
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// be free to add them.
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CHECK(deserializeManifest("{\"future\":1,\"future\":2}").has_value());
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// The same answer one level down, so a hostile manifest cannot make two
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// readers disagree about which spelling of an entry field is the real one.
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CHECK(!deserializeManifest(
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"{\"entries\":[{\"name\":\"a.wav\",\"name\":\"b.wav\",\"length\":1,\"hash\":\"h\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s1\",\"relativePath\":\"p\"}]}}]}")
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.has_value());
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CHECK(!deserializeManifest(
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"{\"entries\":[{\"name\":\"a.wav\",\"length\":1,\"length\":2,\"hash\":\"h\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s1\",\"relativePath\":\"p\"}]}}]}")
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.has_value());
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CHECK(!deserializeManifest(
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"{\"entries\":[{\"name\":\"a.wav\",\"length\":1,\"hash\":\"h\",\"hash\":\"i\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s1\",\"relativePath\":\"p\"}]}}]}")
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.has_value());
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CHECK(!deserializeManifest(
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"{\"entries\":[{\"name\":\"a.wav\",\"length\":1,\"hash\":\"h\","
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s1\",\"relativePath\":\"p\"}]},"
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"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s2\",\"relativePath\":\"q\"}]}}]}")
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.has_value());
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}
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// --- rejection: structural ---------------------------------------------------
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|
||||
// A zero-length entry cannot round-trip through the shell's filesystem seam
|
||||
// (src/shell/package's appendPayload refuses an empty payload) — the format
|
||||
// layer must never produce one, so encode refuses it. Decode does not enforce
|
||||
// this (a hostile/older package declaring one is not this codec's concern).
|
||||
// See src/core/package/CLAUDE.md for the shell seam that forces this.
|
||||
static void testEncodeRejectsZeroLengthEntry() {
|
||||
PackageManifest m = fixture();
|
||||
m.entries[0].byteLength = 0;
|
||||
CHECK(!serializeManifest(m).has_value());
|
||||
}
|
||||
|
||||
// The asymmetry is deliberate: refusing a zero-length entry is an obligation on
|
||||
// what this layer WRITES, not a claim about what a package may declare. Pinned
|
||||
// so it is not "fixed" into a decode-side rejection.
|
||||
static void testDecodeAcceptsZeroLengthEntry() {
|
||||
auto m = deserializeManifest(
|
||||
"{\"entries\":[{\"name\":\"a.wav\",\"length\":0,\"hash\":\"h\","
|
||||
"\"index\":{\"version\":1,\"samples\":[{\"id\":\"s1\",\"relativePath\":\"p\"}]}}]}");
|
||||
CHECK(m.has_value());
|
||||
CHECK(m->entries.size() == 1);
|
||||
CHECK(m->entries[0].byteLength == 0);
|
||||
}
|
||||
|
||||
static void testEncodeRejectsUnrepresentableSample() {
|
||||
PackageManifest m = fixture();
|
||||
m.entries[0].sample.id.clear(); // BankModel::add rejects an empty id
|
||||
@@ -261,9 +355,12 @@ int main() {
|
||||
testUnknownKeysSkippedAtEveryLevel();
|
||||
testEncodeRejectsBadEntryName();
|
||||
testDecodeRejectsBadEntryName();
|
||||
testDecodeRejectsTraversalInNestedPath();
|
||||
testEncodeRejectsTraversalInNestedPath();
|
||||
testDuplicateEntryNamesRejectedBothWays();
|
||||
testDuplicateEntriesKeyRejected();
|
||||
testRepeatedRootKeyRejected();
|
||||
testEncodeRejectsZeroLengthEntry();
|
||||
testDecodeAcceptsZeroLengthEntry();
|
||||
testEncodeRejectsUnrepresentableSample();
|
||||
testDecodeRejectsMalformedShapes();
|
||||
|
||||
|
||||
Reference in New Issue
Block a user