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…tead of aborting The digest, cipher and curve lookups, and X509Certificate#checkIP, converted the string from JS with utf8(), which asserts that the conversion worked. The conversion fails when the UTF-8 form can pass 2^31 - 1 bytes (2^30 Latin-1 characters or more), so these calls aborted the process. They now use tryGetUTF8() and report such a string like any other unknown name.
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Path: .coderabbit.yaml Review profile: ASSERTIVE Plan: Essentials Run ID: 📒 Files selected for processing (3)
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Included review availability: Your plan provides up to 10 included reviews per hour; 8 remain after this review. WalkthroughCrypto name resolution now uses fallible UTF-8 conversion. Failed conversions return existing unknown-name results instead of asserting. Call sites pass string views directly where supported. A subprocess test covers oversized names across crypto and X.509 APIs. ChangesCrypto name conversion
Suggested reviewers: Priority: ⬆️ High Merge Risk: ⚪ Minimal · up to Oversized crypto names now produce the expected errors or undefined results instead of aborting, with no concrete merge-blocking risk identified. 🚥 Pre-merge checks | ✅ 4✅ Passed checks (4 passed)
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Actionable comments posted: 2
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In `@test/js/node/crypto/node-crypto.test.js`:
- Line 1459: Update the repetitive-string construction in the crypto test to use
Buffer.alloc(count, fill).toString() instead of String.prototype.repeat(),
preserving the existing count and fill character.
- Line 1512: Remove the 30_000 per-test timeout argument from the affected
bun:test test declaration in node-crypto.test.js, preserving the test body and
all other test configuration unchanged.
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src/jsc/bindings/JSX509CertificatePrototype.cppsrc/jsc/bindings/ncrypto.cppsrc/jsc/bindings/ncrypto.hsrc/jsc/bindings/node/crypto/CryptoGenEcKeyPair.cppsrc/jsc/bindings/node/crypto/CryptoUtil.cppsrc/jsc/bindings/node/crypto/JSECDHConstructor.cppsrc/jsc/bindings/node/crypto/KeyObject.cpptest/js/node/crypto/node-crypto.test.js
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I reviewed this PR and didn't find any bugs. The utf8() → tryGetUTF8() swap is mechanical and the "unknown name" fallback is the right semantics, but since it touches seven sites across the node:crypto bindings (including an Ec::GetCurveIdFromName signature change) a human glance is still worthwhile.
What was reviewed:
- Each converted site returns the same sentinel (
nullptr/NID_undef/undefined) that an ordinary unknown name already produces, so callers' existing error paths fire unchanged. - All three callers of
Ec::GetCurveIdFromNamewere updated for theconst char*→WTF::StringViewsignature change;GCOwnedDataScope<StringView>andWTF::Stringboth convert implicitly. Cipher::FromNamenow delegates togetCipherByName, so the two cipher lookups share one guarded conversion.- The test drains stdout/stderr/exited concurrently, asserts a combined
{ stdout, stderr, exitCode }object, andskipIfs on total memory — matches the harness conventions.
Extended reasoning...
Overview
This PR replaces WTF::StringView::utf8() / WTF::String::utf8() — which RELEASE_ASSERTs on conversion failure — with tryGetUTF8() at every node:crypto name-lookup site reachable from user-controlled digest, cipher, curve, or IP-address strings. On conversion failure (a Latin-1 string of ≥2^30 characters, whose worst-case UTF-8 buffer would exceed the 2^31-1-byte WTF::Vector cap), each site now returns its existing "not found" sentinel instead of aborting the process. The touched files are ncrypto.cpp/ncrypto.h (getDigestByName, getCipherByName, Cipher::FromName, Ec::GetCurveIdFromName — signature widened to StringView), CryptoUtil.cpp (getByName hasher lookup), JSECDHConstructor.cpp (new curveNidFromShortName helper used by both constructECDH and convertKey), CryptoGenEcKeyPair.cpp and KeyObject.cpp (updated for the widened signature), and JSX509CertificatePrototype.cpp (checkIP). A single spawned-child test in test/js/node/crypto/node-crypto.test.js exercises 12 entry points with a 1 GiB string and asserts the specific error code or undefined per case.
Security risks
None identified. These are name-to-object table lookups that gate whether a digest/cipher/curve exists; no cryptographic verification is weakened. The pre-fix behavior was a process abort reachable from try/catch — a user-triggerable DoS — and the fix converts it to the ordinary ERR_CRYPTO_* error the same call already throws for a name one byte shorter. checkIP returning undefined for an unconvertible string is consistent with "no such IP in the certificate", which is trivially true for a 1 GiB string. No branch falls through to a laxer default; the [[unlikely]] failure arm returns before any BoringSSL call.
Level of scrutiny
Moderate. The transformation is mechanical and each site follows the same three-line pattern, but it spans seven C++ call sites in the crypto bindings and includes a header signature change whose callers must all be updated (I confirmed all three are). Per the approval guidelines, changes in crypto paths warrant a human look even when the diff is defensive, so I'm deferring rather than approving.
Other factors
The test follows the repo's harness rules closely: bunExe/bunEnv, await using on the spawn, Promise.all over stdout/stderr/exited, a combined-object toEqual, skipIf(totalmem() < 10 GiB) mirroring an existing large-string test's gate, and a per-test 30 s ceiling justified by the ~4 s debug-ASAN child. The comment explains why "q".repeat(2**30) is used over the usual Buffer.alloc(n, fill).toString() (half the peak memory, faster at this size). The PR description transparently scopes out two adjacent bugs (Bun::UTF8View and the 2^31-byte passphrase segfault) as separate reports and flags the expected merge conflict with the WebKit upgrade over characters() → legacyCStringPointer().
…valid address checkIP throws ERR_INVALID_ARG_VALUE for a string that is not an IP address. A string too long to convert to UTF-8 is not one either, so it takes the same INVALID_NAME path and no longer returns undefined. The conversion moves into JSX509Certificate::checkIP, which now takes a StringView.
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… UTF-8 (#42798) ### Problem - A non-ASCII string of 2^30 Latin-1 characters or more aborts the process: `panic(main thread): abort() called`, exit 134, also inside `try` / `catch`. Each API that reads it through `Bun::UTF8View` does this, for example `x509.checkHost("\u00e9".repeat(2 ** 30))`. Fuzzing found it, with no user report. - `UTF8View` (`src/jsc/bindings/BunString.h:18`) called `utf8()`, which is `tryGetUTF8()` plus `RELEASE_ASSERT`. It had no failure channel. ### Fix - `UTF8View` has no public constructor. `UTF8View::tryCreate()` returns `std::nullopt` when `tryGetUTF8()` fails, and an overload throws `RangeError: Out of memory`, as #42202 and #42308 do. - An 8-bit ASCII string is still borrowed, never copied. Each user passes a pointer and a length. A `const char*` consumer always needs a copy, and that case is not in this PR (Notes). - These throw now: `new X509Certificate(string)`, `hkdf` / `hkdfSync` (`salt`, `info`), `bun:sqlite` SQL text and string parameters, `new Bun.CookieMap(string)`. `checkHost`, `checkEmail`, `require.resolve.paths` and `Module._resolveLookupPaths` only look the string up, so they answer "no match". Removed `keyFromString`, `passphraseFromBufferSource`, `keyFromPublicString` (no caller). - Verified: `test/js/bun/util/utf8-conversion-limit.test.ts`. The unfixed build aborts at the first case. One row shows that an ASCII string is not copied. ### Background - A JSC string is Latin-1 (8-bit) or UTF-16, with no NUL terminator. `UTF8View` borrows an 8-bit all-ASCII string and converts any other string with WTF. - WTF reserves 2 bytes per Latin-1 character and a buffer holds at most 2^31 - 1 bytes, so 2^30 Latin-1 characters fail. A 16-bit string fails at a UTF-8 form of 2^31 bytes. - JSC throws `RangeError: Out of memory` for a string that it cannot create. <details><summary>Notes</summary> **Repro, on release 1.4.3 canary (09bb546, linux x64).** Each line aborts on its own with exit 134, at 1.1 GB RSS in about 0.6 s. ```js const crypto = require("node:crypto"); const { Database } = require("bun:sqlite"); const long = "\u00e9".repeat(2 ** 30); // Latin-1, not ASCII const x509 = new crypto.X509Certificate(pem); const db = new Database(":memory:"); x509.checkHost(long); x509.checkEmail(long); new crypto.X509Certificate(long); crypto.hkdfSync("sha256", "key", long, "info", 8); // salt crypto.hkdfSync("sha256", "key", "salt", long, 8); // info crypto.hkdf("sha256", "key", long, "info", 8, () => {}); require.resolve.paths(long); require("node:module")._resolveLookupPaths(long); db.run(long); db.prepare(long); db.prepare("SELECT length(?)").get(long); new Bun.CookieMap("a=%41" + long); // the value is converted only when the header has a "%" ``` An ASCII string of the same length is clean in all of them, because `UTF8View` borrows it. A 16-bit string aborts too: 715,827,883 x U+0800 has a UTF-8 form of 2^31 + 1 bytes. With this PR all of these cases throw or answer "no match" for that string as well. One character below the limit (2^30 - 1 x U+00E9) still converts: `checkHost` returns `undefined` after 8 s on release. **Every `UTF8View` user, and what it does when the conversion fails** | User | Now | | --- | --- | | `new X509Certificate(string)` (`JSX509Certificate.cpp`) | throws | | `X509Certificate#checkHost`, `#checkEmail` (`JSX509CertificatePrototype.cpp`) | return `undefined` | | `hkdf`, `hkdfSync`: `salt`, `info` (`CryptoHkdf.cpp`) | throws | | `Database#run`, `#exec`, `#prepare`, `#query`: SQL text (`JSSQLStatement.cpp`) | throws | | `bun:sqlite` string parameter (`JSSQLStatement.cpp` `rebindValue`) | throws | | `new Bun.CookieMap(string)`, `request.cookies` (`CookieMap.cpp`) | `Exception { OutOfMemoryError }`, which both callers throw | | `require.resolve.paths` (`JSCommonJSModule.cpp`), `Module._resolveLookupPaths` (`NodeModuleModule.cpp`) | the request is not a builtin, continue | | `decodeURIComponentSIMD` (`bun:internal-for-testing`) | throws | | `X509Certificate#validToDate`, `#validFromDate` | return `undefined`. The string is the 24 characters that `ASN1_TIME_print` writes, so this cannot happen. #42363 removes both uses. | | native `WebSocket` `onMessage` (`WebSocket.cpp`, used by the Chrome backend of `Bun.WebView`) | drops the message. The client fails a message longer than `MAX_RECEIVE_MESSAGE_LENGTH` first (128 MiB, `src/http_jsc/websocket_client.rs:57`, checked at `:813`). A compressed message has the same bound (`MAX_DECOMPRESSED_SIZE`, `websocket_client/WebSocketDeflate.rs:64`). So this cannot happen. | | replay of queued Chrome commands over the pipe (`ChromeBackend.cpp`) | rejects every pending promise of the transport | | `keyFromString`, `passphraseFromBufferSource`, `keyFromPublicString` | removed, no caller | Two of these did not use `UTF8View` before. The `bun:sqlite` parameter binding had its own copy of the same dispatch (borrow ASCII, else `utf8()`). `Module._resolveLookupPaths` is the twin of `require.resolve.paths` and called `utf8()` for the same builtin check. **Not in this PR.** These call `String::utf8()` or `StringView::utf8()` directly, not `UTF8View`. They abort for a string of 2^30 characters, ASCII included. | Parameter | Site | Owner | | --- | --- | --- | | `X509Certificate#checkIP(ip)` | `jsX509CertificateProtoFuncCheckIP` | #42780 (throws `ERR_INVALID_ARG_VALUE`, as for the same string one character shorter) | | `hkdf(digest)` and the other digest, cipher and curve names | `ncrypto.cpp` | #42780 | | `hkdf(ikm)` as a string of 2^31 UTF-8 bytes | `CryptoHkdf.cpp` `prepareKey` | #42187 | | `process.execve` | `BunProcess.cpp` | #42308 | | `Set-Cookie` header write | `CookieMap.cpp:20` | #42237 | | `bun:sqlite` `new Database(filename)`, `serialize(name)`, `loadExtension(path, entryPoint)`, `fileControl(name)`, `setCustomSQLite(path)` | `JSSQLStatement.cpp:1208`, `1377`, `1428`, `1430`, `1803`, `1955` | follow-up, with the 20 sites of `node:sqlite` (`NodeSqlite.cpp`) | | `Bun.Cookie` `expires` string | `Cookie.cpp:124`, `JSCookie.cpp:62` | follow-up | | `WebSocket` close reason, protocols | `WebSocket.cpp` | follow-up | | Chrome backend pipe command | `ChromeBackend.h:211` | follow-up | Most of them pass a `const char*` to a C API (`sqlite3_open_v2`, `sqlite3_serialize`, `sqlite3_load_extension`, `X509_check_ip_asc`, `EVP_get_digestbyname`). A WTF string has no NUL terminator (`StringImpl::allocationSize` is `tailOffset + length * sizeof(T)`), so that case always needs a copy, and the borrowed branch of `UTF8View` cannot serve it. It stays on `tryGetUTF8()`. `src/jsc` and `src/runtime` have about 100 `utf8()` call sites. Each needs a look: some pass a pointer and a length and can move to `UTF8View`, which also saves the copy of an ASCII string. That is a separate change. **Related open PRs** - #42187 edits `copyBufferOrString` in `CryptoHkdf.cpp` and keeps the `UTF8View utf8(view);` line. The PR that merges second takes the `tryCreate` form, a 3 line rebase. - #42363 rewrites `validToDate` / `validFromDate` and drops their `UTF8View`. - #33312 adds 7 new `Bun::UTF8View(...)` constructor calls (clipboard). After this PR they do not compile until they use `tryCreate`. That is the purpose of the private constructor: a new user cannot skip the failure case. An unchecked `tryCreate(s)->span()` still compiles. **Test.** The length is what is under test, so the child holds a string of 1 GiB, and a second one while the cookie header is joined (2.5 GB peak). One child runs the 14 cases and takes 6 to 10 s in a debug ASAN build. About 5 s of that is the last row, where the unoptimized build scans 1 GiB for a non-ASCII byte. The test skips below 8 GiB of total memory and carries a 30 s ceiling, like `error-message-string-length-limit.test.ts`. A second test runs the same APIs with `"café"` and `"café 😀"` to check that a string that converts still gives the same result. **The ASCII row.** `tryGetUTF8()` refuses every 8-bit string of 2^30 characters before it reads one (`StringImpl.h` `tryGetUTF8ForCharacters`: `isValidCapacityForVector<char8_t>(characters.size() * 2)`). So a `UTF8View` that copied an ASCII string of that length reports `Out of memory`. The row binds `"q".repeat(2 ** 30)` as a `bun:sqlite` parameter. The bundled SQLite answers `string or blob too big` (its limit is 1e9 bytes). The system SQLite that macOS loads takes up to 2 GiB and returns the length. The row accepts these two answers and no other: each shows that SQLite got the string's buffer. The same mechanism is why `Module._resolveLookupPaths("q".repeat(2 ** 30))` aborts on `main`: it called `request.utf8()` to pass a pointer and a length. It borrows now. **Also ran (debug ASAN build):** `x509.test.ts`, `x509-subclass.test.ts`, the vendored `test-crypto-x509.js`, `test-crypto-hkdf.js`, `test-crypto-sign-verify.js`, `test-crypto-key-objects.js`, `test-require-resolve.js`, `hkdf-callback-null.test.ts`, `hkdf-zero-length.test.ts`, `sqlite.test.js`, the four cookie suites, `decodeURIComponentSIMD.test.ts`, `node-module-module.test.js`, `resolve.test.ts`, `webview-chrome-pipe.test.ts`, `webview-chrome-disconnect.test.ts`. The child script also ran with `BUN_JSC_validateExceptionChecks=1`, with no report. In `sqlite.test.js`, `#13082` times out on this machine's debug build (about 6 s against the 5 s limit), with and without this change. **Self-review: 6 concerns raised, 4 addressed.** - Addressed: `checkHost` / `checkEmail` threw. They return `undefined` now. The rule that they and `checkIP` in #42780 follow: a call reports what it reports for the same string one character shorter. That string is a name that matches no certificate. - Addressed: the same 4 line throw block appeared 7 times. It is the `tryCreate(globalObject, scope, view)` overload now. - Addressed: the `bun:sqlite` parameter binding still aborted, through its own copy of the dispatch. - Addressed: the description named API surfaces as done. It names parameters now, and the table above lists what is left, with an owner for each row. - Rejected: convert the six other `utf8()` calls of `JSSQLStatement.cpp` here, through a new `Bun::tryUTF8`. They are direct `utf8()` callers that need a NUL-terminated copy. They belong with the `node:sqlite` sites in one change for that mechanism. - Rejected: bound the conversion by `Bun::maxVectorSize` so that a test can reach the failure with a small string. It would test a branch that production never takes, and a crash fix needs the crashing input as its fixture. **Review.** The review asked that the two cases stay apart: a `const char*` consumer (always a copy) and a pointer plus length consumer (borrow an ASCII string). `UTF8View` is the second case only, before and after this PR. Since the review: the comment on `UTF8View` says so, the fields are `m_borrowed` and `m_converted`, and the ASCII row above guards the borrow. </details> <!-- robobun:evidence:begin --> --- **[human-review]** gate passed · iteration 0 · 16 files touched <details><summary>fails on main (without fix)</summary> ```console ASAN without fix: 1 FAILED $ BUN_DEBUG_QUIET_LOGS=1 bun scripts/build.ts --profile=debug --quiet test "--reporter=junit" "--reporter-outfile=/tmp/pr_gate.xml" "test/js/bun/util/utf8-conversion-limit.test.ts" bun test v1.4.3 (09bb546) test/js/bun/util/utf8-conversion-limit.test.ts: 69 | env: bunEnv, 70 | stdout: "pipe", 71 | stderr: "pipe", 72 | }); 73 | const [stdout, stderr, exitCode] = await Promise.all([proc.stdout.text(), proc.stderr.text(), proc.exited]); 74 | expect({ stdout: stdout.trim().split("\n"), stderr, exitCode }).toEqual({ ^ error: expect(received).toEqual(expected) { - "exitCode": 0, - "stderr": "", + "exitCode": 134, + "stderr": + "ASSERTION FAILED: expectedString + vendor/WebKit/Source/WTF/wtf/text/StringView.cpp(121) : CString WTF::StringView::utf8(ConversionMode) const + no stacktrace available" + , "stdout": [ - "X509Certificate#checkHost: returned undefined", - "X509Certificate#checkEmail: returned undefined", - "new X509Certificate: RangeError: Out of memory", - "hkdfSync salt: RangeError: Out of memory", - "hkdfSync info: RangeEr ... (truncated) release without fix: 1 FAILED bun test v1.4.3-canary.1 (09bb546) test/js/bun/util/utf8-conversion-limit.test.ts: 69 | env: bunEnv, 70 | stdout: "pipe", 71 | stderr: "pipe", 72 | }); 73 | const [stdout, stderr, exitCode] = await Promise.all([proc.stdout.text(), proc.stderr.text(), proc.exited]); 74 | expect({ stdout: stdout.trim().split("\n"), stderr, exitCode }).toEqual({ ^ error: expect(received).toEqual(expected) { - "exitCode": 0, - "stderr": "", + "exitCode": 134, + "stderr": + "============================================================ + Bun Canary v1.4.3-canary.1 (09bb546) Linux x64 + Linux Kernel v7.0.0 | glibc v2.41 + CPU: sse42 popcnt avx avx2 avx512 + Args: "/workspace/bun/build/release/bun" "-e" "\n import { decodeURIComponentSIMD } from \"bun:internal-for-testing\";\n import { Database } from \"bun:sqlite\";\n import crypto from \"node:crypto\";\n import Module"... + Features: Bun.stderr(2) bunfig jsc tsconfig + Builtins: "bun:internal-for-testing" "bun:main" "bun:sqlite" "node:crypto" "node:module" + + Elapsed: 740ms | User: 198ms | Sys: 543ms + RSS: 1.12 ... (truncated) ``` </details> <details><summary>passes on PR (with fix)</summary> ```console ASAN with fix: all passed $ BUN_DEBUG_QUIET_LOGS=1 bun scripts/build.ts --profile=debug --quiet test "--reporter=junit" "--reporter-outfile=/tmp/pr_gate.xml" "test/js/bun/util/utf8-conversion-limit.test.ts" bun test v1.4.3 (09bb546) test/js/bun/util/utf8-conversion-limit.test.ts: (pass) a string whose UTF-8 form does not fit in a buffer is an error instead of an abort [3129.31ms] (pass) a short Latin-1 string converts as before [70.38ms] (pass) a short 16-bit string converts as before [10.22ms] 3 pass 0 fail 3 expect() calls Ran 3 tests across 1 file. [5.80s] __F:0:S:0 release with fix: all passed $ bun scripts/build.ts --profile=release [configured] bun-profile → bun (stripped) target linux-x64-gnu build type Release build dir ./build/release revision 40af339 features lto, baseline 23 deps, 131 codegen, 1176 objects in 698ms ninja: Entering directory `/workspace/bun/build/release' [1/1254] mkdir codegen [2/1254] mkdir stamps [3/1254] mkdir pch [4/1254] mkdir obj [5/1254] install /workspace/bun bun install v1.4.3-canary.1 (09bb546) Checked 22 installs across 61 packages (no changes) [11.00ms] [6/1254] install /workspace/bun/packages/bun-error bun install v1.4.3-canary.1 (09bb546) Checked 1 install across 2 packages (no changes) [4.00ms] [7/1254] gen ErrorCode+*.h [8/1254] install /workspace/bun/src/node-fallbacks bun install v1.4.3-canary.1 (09bb546) Checked 111 installs across 104 packages (no changes) [6.00ms] [9/1254] gen .bind.ts → GeneratedBindings.cpp [10/1254] fetch picohttpparser [picohttpparser] up to date [11/1254] fetch zlib [zlib] up to date [12/1254] gen bindgenv2 [13/1254] gen node-fallbacks/react-refresh.js Bundled 1 module in 5ms react-refresh.js 4.81 KB (entry point) [14/1254] fetch libjpeg ... (truncated) ``` </details> <details><summary>diff hotspot</summary> ``` src/jsc/bindings/BunString.cpp | 8 ++ src/jsc/bindings/BunString.h | 52 ++++----- src/jsc/bindings/CookieMap.cpp | 6 +- src/jsc/bindings/JSCommonJSModule.cpp | 6 +- src/jsc/bindings/JSX509Certificate.cpp | 9 +- src/jsc/bindings/JSX509CertificatePrototype.cpp | 26 +++-- src/jsc/bindings/decodeURIComponentSIMD.cpp | 5 +- src/jsc/bindings/node/crypto/CryptoHkdf.cpp | 5 +- src/jsc/bindings/node/crypto/CryptoUtil.cpp | 76 -------------- src/jsc/bindings/node/crypto/CryptoUtil.h | 2 - src/jsc/bindings/node/crypto/JSVerify.cpp | 36 ------- src/jsc/bindings/sqlite/JSSQLStatement.cpp | 22 ++-- src/jsc/bindings/webcore/WebSocket.cpp | 5 +- src/jsc/modules/NodeModuleModule.cpp | 10 +- src/runtime/webview/ChromeBackend.cpp | 8 +- test/js/bun/util/utf8-conversion-limit.test.ts | 134 ++++++++++++++++++++++++ 16 files changed, 233 insertions(+), 177 deletions(-) ``` </details> **gate history** · 1 passed · 0 rejected · iteration 0 <details><summary>evidence per changed file</summary> ``` file reads edits tests src/jsc/bindings/BunString.cpp 0 0 13 src/jsc/bindings/BunString.h 3 2 13 src/jsc/bindings/CookieMap.cpp 0 0 13 src/jsc/bindings/JSCommonJSModule.cpp 0 0 13 src/jsc/bindings/JSX509Certificate.cpp 0 0 13 src/jsc/bindings/JSX509CertificatePrototype.cpp 0 0 13 src/jsc/bindings/decodeURIComponentSIMD.cpp 0 0 13 src/jsc/bindings/node/crypto/CryptoHkdf.cpp 0 0 13 src/jsc/bindings/node/crypto/CryptoUtil.cpp 0 0 13 src/jsc/bindings/node/crypto/CryptoUtil.h 0 0 13 src/jsc/bindings/node/crypto/JSVerify.cpp 0 0 13 src/jsc/bindings/sqlite/JSSQLStatement.cpp 0 0 13 src/jsc/bindings/webcore/WebSocket.cpp 0 0 13 src/jsc/modules/NodeModuleModule.cpp 0 0 13 src/runtime/webview/ChromeBackend.cpp 0 0 13 test/js/bun/util/utf8-conversion-limit.test.ts 1 1 13 ``` </details> <!-- robobun:evidence:end -->
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Yes, it is still needed. 0ea0a56 (#42798) fixes a different helper.
I rebased the branch on main. There were no conflicts with #42798. I am running the new test against a build with main's |
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Problem
node:cryptocall aborts the process when the digest, cipher or curve name is a string of 2^30 characters or more:panic(main thread): abort() called, exit code 134, also insidetry/catch. A debug build printsASSERTION FAILED: expectedStringatCString WTF::StringView::utf8(ConversionMode) const. Example:bun -e 'try { require("crypto").createHash("q".repeat(2**30)) } catch {}'. Twelve calls abort (Notes).src/jsc/bindings/ncrypto.cpp(getDigestByName,getCipherByName,Cipher::FromName) and insrc/jsc/bindings/node/crypto/convert the name withutf8(), which asserts success.Fix
tryGetUTF8(). On failure no such name exists: the lookup returnsnullptrorNID_undef.Ec::GetCurveIdFromNameandJSX509Certificate::checkIPtake aStringViewand convert inside.Cipher::FromNamecallsgetCipherByName.checkIPtakes its invalid-address path.Digest method not supported,ERR_CRYPTO_INVALID_DIGEST,ERR_CRYPTO_UNKNOWN_CIPHER,ERR_CRYPTO_INVALID_CURVE,ERR_INVALID_ARG_VALUE, orundefined.test/js/node/crypto/node-crypto.test.js, one new test, 12 cases in one child, which aborts on main. Also 16 files oftest/js/node/crypto/and the 120test-crypto-*.jsnode tests (Notes). Self-reviewed: 4 concerns survived, 2 addressed, 2 answered in Notes.Background
utf8()istryGetUTF8()plusRELEASE_ASSERT.tryGetUTF8()returnsstd::expected.WTF::Vectorholds at most 2^31 - 1 bytes. So it refuses 2^30 characters or more, before allocating.EVP_get_digestbyname,EVP_get_cipherbyname,OBJ_sn2nid), so the name must be converted.Notes
Entry points. Each aborts alone on 1.4.3 (
09bb54630). A debug build withsrc/at main90fba662a3fails the new test with the assertion above. With this branch each one reports the result on the right.Other calls reach the same lookups and are fixed by the same lines:
createVerify,verify,createDecipheriv,publicEncryptwithoaepHash,generateKeyPairSync("rsa-pss", { hashAlgorithm }),KeyObject#export({ cipher }).The limit, traced.
StringImpl::tryGetUTF8ForCharacters(Latin-1) returnsUTF8ConversionError::OutOfMemorywhen!isValidCapacityForVector<char8_t>(characters.size() * 2), and that limit is(UINT_MAX >> 1)bytes. 1,073,741,823 characters convert. 1,073,741,824 do not. A 16-bit string fails when its UTF-8 form is 2^31 bytes or more: 715,827,882 x U+0800 converts, 715,827,883 aborts on 1.4.3. Both paths fail before they allocate, so the fixed calls cost nothing for such a name.Why the ordinary error and not
RangeError: Out of memory. The lookup answers one question: does a digest, cipher or curve have this name. For a name this long the answer is no, and no memory is needed to know it. Node v26.3.0 cannot build a string this long (its limit is 2^29 - 24). With its longest string it throwsDigest method not supported.A name between 2^30 and 2^31 - 1 characters.
ERR_CRYPTO_INVALID_DIGESTputs the name in its message. With a name of 2^31 - 10 characters the message does not fit in a string, and the call throwsRangeError: Out of memoryfromMessageBuilder(#42202). Nothing aborts.Not in this PR. The same assert is reachable from other modules. Each has its own report or PR.
Bun::UTF8View(BunString.h) callsutf8()for a string that is not ASCII. Sox509.checkHost("\u00e9".repeat(2 ** 30)),checkEmailand thehkdfSyncsaltandinfoabort. With an ASCII string of the same length they do not, becauseUTF8Viewborrows it. The helper has 16 users. Fixed by UTF8View: throw instead of aborting when a string does not convert to UTF-8 #42798 (merged). It does not touch the lookups in this PR, which callutf8()directly: a debug build withsrc/at mainb841a68a6c, which contains UTF8View: throw instead of aborting when a string does not convert to UTF-8 #42798, still fails the new test with the assertion above.int.generateKeyPairSyncwithprivateKeyEncoding.passphrase = Buffer.alloc(2 ** 31)segfaults insha256_block_data_order_hw: node:crypto: throw ERR_OUT_OF_RANGE for a passphrase larger than INT_MAX bytes #42782.process.execve: process.execve: throw instead of aborting for a string past the string limits #42308.console.count/console.timelabels (ConsoleObject.cpp:63-100, sixtryGetUTF8().value()calls), the user and group names ofprocess.setuid/setgid/initgroups(BunProcess.cpp), and about 27utf8()sites inbun:sqliteandnode:sqlite(database path, SQL text, extension path). Each aborts on 1.4.3 with a string of 2^30 characters.checkIPthrows,checkHostandcheckEmailin #42798 returnundefined. Each call reports what it reports for the same string one character shorter. 2^30 - 1 xqis not an IP address, socheckIPthrowsERR_INVALID_ARG_VALUE(Invalid IP address, Node:Invalid IP). The same string is a host name that matches no certificate, socheckHostreturnsundefined. The first revision of this PR returnedundefinedfromcheckIP. The self-review caught it.Self-review. Four concerns survived.
undefinedfromcheckIP. Fixed, see above.Bun::UTF8View, and these sites need a NUL-terminated C string for BoringSSL, so they cannot useUTF8View.tryGetUTF8()is the shared fallible converter, and each site chooses its own result.The JWK caller of
Ec::GetCurveIdFromName(KeyObject.cpp) validatescrvagainst four literals first, so it was never reachable with a long string. It changes only because the signature changed.Cost of the test. The length is what is under test, so the child needs a string of 1 GiB. One child runs the 12 cases, so the string is allocated once.
ERR_CRYPTO_INVALID_DIGESTcarries the name, so four of the errors are another 1 GiB each. ABun.gc(true)between cases keeps the peak at 3.4 GB in a debug ASAN build, where the child takes about 3.5 s. The test skips below 10 GiB of total memory, the gate thattest/js/bun/util/error-message-string-length-limit.test.tsuses, and carries a 30 s ceiling.Suites run with this branch (debug ASAN build).
node-crypto,crypto,ecdh,crypto.hmac,crypto-hmac-algorithm,hkdf-callback-null,hkdf-zero-length,crypto-oneshot,crypto-sign-regression,sign-jwk-ieee-p1363,crypto-lazyhash,x509,x509-subclass,crypto.key-objects,crypto-pqc,crypto-rsa: all pass. Everytest/js/node/test/parallel/test-crypto-*.js(120 files): all pass. The 12-case fixture also passes underBUN_JSC_validateExceptionChecks=1.Conflict to expect. #42666 (WebKit upgrade) edits the same
utf8().data()lines and renamesUTF8CString::characters()tolegacyCStringPointer(). Whichever lands second needs that rename at the sevencharacters()calls here.[human-review] gate passed · iteration 0 · 10 files touched
fails on main (without fix)
passes on PR (with fix)
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gate history · 1 passed · 0 rejected · iteration 0
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