fix(sdk): reject a zipstream write set that omits segment 0 - #3932
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📝 WalkthroughWalkthroughThis change adds explicit validation for segment zero during ZIP finalization. It distinguishes empty input from missing segment zero, documents cleanup behavior, and adds tests for failed finalization, retry success, ZIP payload integrity, and CRC validation. ChangesSegment zero validation
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to Cleanup can leave Finalize producing an invalid ZIP or returning the wrong error when segment 0 is removed. The PR is not merge-ready until these cleanup paths are corrected and covered by regression tests. Suggested reviewers: Poem
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…output zipstream stamped ZIP header and segment-metadata timestamps straight from time.Now, so archive bytes could never be compared byte-for-byte across runs. Config gains a Now func() time.Time, defaulted to time.Now and overridable via WithClock; NewSegmentMetadata takes the time source explicitly and SegmentEntry.Written stamps from it. Now is an exported field on an exported Config and Option is a bare func(*Config), so an option is free to nil it out even though WithClock will not. applyOptions restores the default rather than letting the first header stamp panic. Injecting a clock also makes the MS-DOS date encoder reachable with years it cannot represent. The year is a 7-bit offset from 1980, so an out-of-range value wrapped through the uint16 conversion into a plausible but wrong date, silently and with no error: the zero time.Time landed on 2049-01-01 and the Unix epoch on 2098-01-01. The two copies of the encoder, one for the local file header and one for the central directory, are now a single msDosTimeDate that clamps to 1980..2107, so fixing one copy cannot leave the other wrapped. No behavior change for existing callers: sdk/tdf.go constructs the writer without WithClock and keeps time.Now, which is always in range. Signed-off-by: David Mihalcik <dmihalcik@virtru.com>
Only segment 0 emits the payload's ZIP local file header, and Finalize
computes every offset it records -- central directory, data descriptor,
end-of-central-directory -- as though that header sits at the front of
the assembled stream. A write set that skips index 0 therefore produced
a structurally corrupt archive whose trailer pointed a reader past the
end of its own buffer.
IsComplete cannot catch this: Order is derived from whatever indices
arrived, so {1, 2} is internally consistent. The check has to stand on
its own, and it has to survive CleanupSegment(0) dropping the header
after the fact.
Sparse indices remain legal -- a caller mapping S3 multipart uploads
onto segments may write 0, 1, 5000 -- so this only requires that the
set starts at 0, not that it is contiguous.
Behavior change: Finalize now returns ErrNoSegmentZero where it
previously returned a corrupt archive. No in-repo caller is affected;
sdk/tdf.go writes segments sequentially from 0.
Signed-off-by: David Mihalcik <dmihalcik@virtru.com>
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Inline comments:
In `@sdk/internal/zipstream/segment_writer.go`:
- Around line 249-252: Prevent Finalize from producing a trailer after
CleanupSegment removes required segment metadata while payloadEntry still
includes its bytes; retain the segment’s size/CRC metadata through finalization
or reject Finalize with an error when metadata was cleaned up. Update the
segment cleanup/finalization logic around CleanupSegment and Finalize, and add a
ZIP-read regression test covering cleanup of segment 1 followed by finalization.
- Around line 131-133: Update the finalize logic in the segment writer so
cleanup of the only segment, specifically segment 0 via CleanupSegment, returns
ErrNoSegmentZero rather than ErrSegmentMissing; track the removal state or
equivalent while preserving ErrSegmentMissing for genuinely empty input, and add
a regression test covering writing only segment 0 followed by CleanupSegment(0).
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sdk/internal/zipstream/segment_writer.gosdk/internal/zipstream/segment_writer_test.gosdk/internal/zipstream/writer.go
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CleanupSegment dropped a segment's presence marker but left its bytes in payloadEntry.Size and CompressedSize. Finalize then combined a CRC over the survivors while sizing every offset as though the removed segment were still there, so the trailer described a payload the caller could not assemble: archive/zip opens the result, reads the manifest happily, and fails the payload with a checksum error or a negative offset. That is the same corruption this branch already rejects for index 0. Undo the size contribution alongside the presence marker, making a cleaned-up index indistinguishable from one that was never written -- which sparse write sets already allow. The presentCount > 0 clamp goes away with it; we now only decrement when an entry was actually found, so the guarded state is unreachable and would have masked a real accounting bug. Docs: Finalize returns ErrSegmentMissing when no segments *remain*, not only when none were written -- cleaning up the last one lands there too. The experimental/tdf Finalize doc claimed gaps in segment indices cause failure; they are legal and tested, while the real new failure (a set that omits index 0) went unlisted. The CleanupSegment contract now lives on the interface rather than being duplicated and divergent across it and the implementation. Signed-off-by: David Mihalcik <dmihalcik@virtru.com>
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> **Part 08 of 20** in the DSPX-2604 re-cut. Base branch: `main`. > > This stack replaces #3782 / #3865 / #3921, which stay open and untouched > until it lands. Nothing here is a rebase of those branches — the work was > re-cut from the ticket so each PR stands on its own. ### Proposed Changes Adds otdfctl/pkg/streamio, holding the input and output plumbing that the streaming encrypt and decrypt work needs, and migrates `inspect` onto it so nothing is left calling the buffered helpers it supersedes. This is groundwork with one user-visible consequence: `inspect` no longer reads the whole TDF into memory. Everything else is a move. Why a new package rather than pkg/cli. The helpers in pkg/cli/pipe.go call ExitWithError -- which calls os.Exit -- from inside the read, so they cannot be used from anywhere that wants to handle the failure itself, and they read the entire input into memory. streamio returns errors and leaves the decision to exit with the command layer. What moved in: - PipeReader establishes whether stdin is a non-empty pipe with a one-byte Peek instead of a read, so the payload still reaches the caller. - Spool copies a pipe to a temporary file and rewinds it. A TDF's manifest sits at the end of the archive, so decrypt and inspect have to seek and cannot consume a pipe directly. - OpenSeekable resolves "file argument or piped stdin" to one seekable handle, reporting ErrNoInput for the shared "nothing to read" case. - OutputFile writes to a temporary sibling of the destination and renames it into place on Commit, so a failed run leaves no partial output. The temp file is a sibling so the rename stays atomic rather than degrading to a cross-filesystem copy. Per review feedback on #3921: - readPipedStdin now delegates its detection to streamio.PipeReader rather than answering "is there piped input?" a second way. Its read is still unbounded; the callers that must stop buffering are changed separately. - pkg/cli/pipe.go is deprecated rather than deleted, since the package is exported and may have callers outside this repository. Worth noting that ReadFromFile has no size cap at all -- not even the 10 GB the tdf commands apply -- which is its own argument for the notice. InspectTDF takes an io.ReadSeeker instead of a byte slice. GetTdfType already rewinds to the start, so the reader is positioned for LoadTDF. Because cli.ExitWithError calls os.Exit and skips deferred functions, inspectRun invokes cleanup explicitly on every exit path, including the successful one: piped input is spooled to disk and the temp file would otherwise survive. ### Checklist - [x] I have added or updated unit tests - [ ] I have added or updated integration tests (if appropriate) - [ ] I have added or updated documentation ### Testing Instructions ``` cd otdfctl && go test ./pkg/streamio/... ./cmd/... -race ``` `inspect` is the only command migrated in this PR; check it still reads both a file argument and piped stdin, and that no `otdfctl-spool-*` file survives either run. <details> <summary><b>The full DSPX-2604 stack — 20 PRs</b></summary> | # | PR | Based on | |---|----|----------| | 01 | #3930 chore: bump go.work toolchain to go1.25.12 and simplify an rt_test condition | `main` | | 02 | #3931 feat(sdk): make the zipstream clock injectable for deterministic ZIP output | `main` | | 03 | #3932 fix(sdk): reject a zipstream write set that omits segment 0 | #3931 | | 04 | #3933 fix(sdk): map ReadAt plaintext offsets from cumulative segment sizes | `main` | | 05 | #3934 chore(sdk): extract integrityAlgorithmString, createPolicyBinding, signAssertions | `main` | | 06 | #3935 chore(sdk): add direct tests for createKeyAccess, encryptMetadata and tdfSalt | `main` | | 07 | #3936 fix(sdk): fill each segment with io.ReadFull and size the buffer to the input | `main` | | 08 | #3937 chore(cli): move streaming IO helpers into pkg | `main` | | 09 | #3938 fix(cli): stream encrypt instead of buffering the whole payload | #3937 | | 10 | #3939 fix(cli): stream decrypt and inspect instead of buffering | #3938 | | 11 | #3940 feat(sdk): add a chunked segment writer (experimental) | `dspx-2604-base-11` = #3932 + #3934 + #3935 | | 12 | #3941 fix(sdk): stop GetManifest from splitting the key under the lock | #3940 | | 13 | #3942 fix(sdk): reject a chunked split naming a KAS with no resolved public key | #3941 | | 14 | #3943 chore(sdk): alias experimental/tdf manifest and assertion types | #3942 | | 15 | #3944 fix(sdk): emit spec-compliant key access in experimental/tdf and delegate Writer | #3943 | | 16 | #3945 feat(sdk): accept io.Reader in CreateTDF and drop the 64 GB payload cap | #3936 | | 17 | #3946 chore(sdk): rewrite CreateTDF on top of the chunked writer | `dspx-2604-base-17` = #3944 + #3945 | | 18 | #3947 chore(sdk): drop dead TDFConfig fields and deprecate the TDFFormat enum | #3946 | | 19 | #3948 fix(cli): drop the encrypt-side stdin spool | `dspx-2604-base-19` = #3947 + #3939 | | 20 | #3949 feat(sdk): graduate the chunked writer to stable API | #3948 | **Reviewable in parallel right now**, since they sit directly on `main` and depend on nothing else: 01, 02, 04, 05, 06, 07, 08. **Why three PRs have a `dspx-2604-base-*` base.** A GitHub PR takes one base branch, but 11, 17 and 19 each build on more than one parent. The `base-*` branches are empty merge commits that exist only to join those parents so the PR diff shows exactly its own change and nothing else. They contain no code, have no PR of their own, and go away once their parents land — retarget the child onto `main` at that point. **Wants a cross-SDK xtest run before merge:** 15, 17 (and therefore 20). They touch the KAS wire format. **Red checks you may see are network flakes, not this stack.** Four distinct ones hit this batch and all clear on re-run: `golangci-lint config verify` timing out on `https://golangci-lint.run/.../golangci.v2.8.jsonschema.json` (fails the whole `go (<module>)` job and fail-fast cancels its siblings), the bats installer getting a 403, Docker Hub timing out on `keycloak/keycloak:26.4`, and `buf` reporting "the server hosted at that remote is unavailable" while the Java SDK generates sources. The `govulncheck` step also emits `##[error]` annotations against the go1.25.11 stdlib, but it is `continue-on-error: true` and never fails a job — 01 bumps the toolchain and clears those annotations. </details> <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit - **New Features** - Added reliable support for inspecting TDF content from files, piped input, and standard input. - Added safer output handling that prevents incomplete files from replacing existing results. - Added clearer input errors when no content is provided or an input cannot be opened. - **Bug Fixes** - Improved handling of large and non-seekable input streams. - Preserved piped input correctly while processing and inspecting content. - Non-fatal inspection issues are now reported as warnings where possible, allowing processing to continue. <!-- end of auto-generated comment: release notes by coderabbit.ai --> Signed-off-by: Dave Mihalcik <dmihalcik@virtru.com>
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Proposed Changes
Only segment 0 emits the payload's ZIP local file header, and Finalize
computes every offset it records -- central directory, data descriptor,
end-of-central-directory -- as though that header sits at the front of
the assembled stream. A write set that skips index 0 therefore produced
a structurally corrupt archive whose trailer pointed a reader past the
end of its own buffer.
IsComplete cannot catch this: Order is derived from whatever indices
arrived, so {1, 2} is internally consistent. The check has to stand on
its own, and it has to survive CleanupSegment(0) dropping the header
after the fact.
Sparse indices remain legal -- a caller mapping S3 multipart uploads
onto segments may write 0, 1, 5000 -- so this only requires that the
set starts at 0, not that it is contiguous.
Behavior change: Finalize now returns ErrNoSegmentZero where it
previously returned a corrupt archive. No in-repo caller is affected;
sdk/tdf.go writes segments sequentially from 0.
Checklist
Testing Instructions
The full DSPX-2604 stack — 20 PRs
mainmainmainmainmainmainmaindspx-2604-base-11= #3932 + #3934 + #3935dspx-2604-base-17= #3944 + #3945dspx-2604-base-19= #3947 + #3939Reviewable in parallel right now, since they sit directly on
mainand depend onnothing else: 01, 02, 04, 05, 06, 07, 08.
Why three PRs have a
dspx-2604-base-*base. A GitHub PR takes one base branch,but 11, 17 and 19 each build on more than one parent. The
base-*branches are emptymerge commits that exist only to join those parents so the PR diff shows exactly its
own change and nothing else. They contain no code, have no PR of their own, and go
away once their parents land — retarget the child onto
mainat that point.Wants a cross-SDK xtest run before merge: 15, 17 (and therefore 20). They touch
the KAS wire format.
Red checks you may see are network flakes, not this stack. Four distinct ones hit
this batch and all clear on re-run:
golangci-lint config verifytiming out onhttps://golangci-lint.run/.../golangci.v2.8.jsonschema.json(fails the wholego (<module>)job and fail-fast cancels its siblings), the bats installer getting a 403,Docker Hub timing out on
keycloak/keycloak:26.4, andbufreporting "the serverhosted at that remote is unavailable" while the Java SDK generates sources. The
govulncheckstep also emits##[error]annotations against the go1.25.11 stdlib, butit is
continue-on-error: trueand never fails a job — 01 bumps the toolchain andclears those annotations.
Summary by CodeRabbit