crypto: move DEP0198 to End-of-Life

Signed-off-by: Filip Skokan <panva.ip@gmail.com>

Author: panva

doc/api/crypto.md

@@ -3771,6 +3771,10 @@ and description of each available elliptic curve.
 <!-- YAML
 added: v0.1.92
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/64000
+    description: The `outputLength` option is now required for XOF
+                 hash functions without default output lengths.
   - version: v12.8.0
     pr-url: https://github.com/nodejs/node/pull/28805
     description: The `outputLength` option was added for XOF hash functions.
@@ -3783,7 +3787,8 @@ changes:
 Creates and returns a `Hash` object that can be used to generate hash digests
 using the given `algorithm`. Optional `options` argument controls stream
 behavior. For XOF hash functions such as `'shake256'`, the `outputLength` option
-can be used to specify the desired output length in bytes.
+specifies the desired output length in bytes. It is required for XOF hash
+functions without a default output length.
 
 The `algorithm` is dependent on the available algorithms supported by the
 version of OpenSSL on the platform. Examples are `'sha256'`, `'sha512'`, etc.
@@ -4889,6 +4894,10 @@ added:
  - v21.7.0
  - v20.12.0
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/64000
+    description: The `outputLength` option is now required for XOF
+                 hash functions without default output lengths.
   - version:
      - v25.5.0
      - v24.13.1
@@ -4909,7 +4918,8 @@ changes:
   * `outputEncoding` {string} [Encoding][encoding] used to encode the
     returned digest. **Default:** `'hex'`.
   * `outputLength` {number} For XOF hash functions such as 'shake256',
-    the outputLength option can be used to specify the desired output length in bytes.
+    specifies the desired output length in bytes. This option is required for
+    XOF hash functions without a default output length.
 * Returns: {string|Buffer}
 
 A utility for creating one-shot hash digests of data. It can be faster than

doc/api/deprecations.md

@@ -4354,6 +4354,9 @@ npx codemod@latest @nodejs/types-is-native-error
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/64000
+    description: End-of-Life.
   - version: v25.0.0
     pr-url: https://github.com/nodejs/node/pull/59008
     description: Runtime deprecation.
@@ -4365,9 +4368,10 @@ changes:
     description: Documentation-only deprecation with support for `--pending-deprecation`.
 -->
 
-Type: Runtime
+Type: End-of-Life
 
-Creating SHAKE-128 and SHAKE-256 digests without an explicit `options.outputLength` is deprecated.
+Creating SHAKE-128 and SHAKE-256 digests without an explicit
+`options.outputLength` is no longer supported.
 
 ### DEP0199: `require('node:_http_*')`
 

lib/internal/crypto/hash.js

@@ -3,7 +3,6 @@
 const {
   FunctionPrototypeCall,
   ObjectSetPrototypeOf,
-  StringPrototypeReplace,
   StringPrototypeToLowerCase,
   Symbol,
   TypedArrayPrototypeGetBuffer,
@@ -73,25 +72,6 @@ const LazyTransform = require('internal/streams/lazy_transform');
 const kState = Symbol('kState');
 const kFinalized = Symbol('kFinalized');
 
-/**
- * @param {string} name
- * @returns {string}
- */
-function normalizeAlgorithm(name) {
-  return StringPrototypeReplace(StringPrototypeToLowerCase(name), '-', '');
-}
-
-const maybeEmitDeprecationWarning = getDeprecationWarningEmitter(
-  'DEP0198',
-  'Creating SHAKE128/256 digests without an explicit options.outputLength is deprecated.',
-  undefined,
-  false,
-  (algorithm) => {
-    const normalized = normalizeAlgorithm(algorithm);
-    return normalized === 'shake128' || normalized === 'shake256';
-  },
-);
-
 const emitHmacDigestDeprecation = getDeprecationWarningEmitter(
   'DEP0206',
   'Calling Hmac.digest() more than once is deprecated.',
@@ -117,9 +97,6 @@ function Hash(algorithm, options) {
   this[kState] = {
     [kFinalized]: false,
   };
-  if (!isCopy && xofLen === undefined) {
-    maybeEmitDeprecationWarning(algorithm);
-  }
   FunctionPrototypeCall(LazyTransform, this, options);
 }
 
@@ -334,10 +311,6 @@ function hash(algorithm, input, options) {
     outputLength += 0;
   }
 
-  if (outputLength === undefined) {
-    maybeEmitDeprecationWarning(algorithm);
-  }
-
   return oneShotDigest(algorithm, getCachedHashId(algorithm), getHashCache(),
                        input, normalized, encodingsMap[normalized], outputLength);
 }

src/crypto/crypto_hash.cc

@@ -246,6 +246,39 @@ const EVP_MD* GetDigestImplementation(Environment* env,
 #endif
 }
 
+void MarkInvalidXofLength() {
+  EVPerr(EVP_F_EVP_DIGESTFINALXOF, EVP_R_NOT_XOF_OR_INVALID_LENGTH);
+}
+
+// DEP0198 EOL requires XOFs without an OpenSSL-defined default output length
+// to fail when outputLength is omitted. OpenSSL 3.4 and later report a digest
+// size of 0 for such XOFs, including SHAKE, which had weak historical defaults
+// before OpenSSL 3.4. For older OpenSSL versions, identify those resolved
+// EVP_MD values explicitly to keep the missing-outputLength error
+// version-independent.
+#if !OPENSSL_VERSION_PREREQ(3, 4)
+bool IsShakeDigest(const EVP_MD* md) {
+#if OPENSSL_VERSION_MAJOR >= 3
+  return EVP_MD_is_a(md, "SHAKE128") || EVP_MD_is_a(md, "SHAKE256");
+#else
+  const char* name = OBJ_nid2sn(EVP_MD_type(md));
+  return name != nullptr &&
+         (strcmp(name, "SHAKE128") == 0 || strcmp(name, "SHAKE256") == 0);
+#endif
+}
+#endif
+
+bool ShouldRejectMissingXofLength(const EVP_MD* md, size_t default_length) {
+  if (default_length == 0) return true;
+
+#if !OPENSSL_VERSION_PREREQ(3, 4)
+  return IsShakeDigest(md);
+#else
+  static_cast<void>(md);
+  return false;
+#endif
+}
+
 // crypto.digest(algorithm, algorithmId, algorithmCache,
 //               input, outputEncoding, outputEncodingId, outputLength)
 void Hash::OneShotDigest(const FunctionCallbackInfo<Value>& args) {
@@ -287,18 +320,10 @@ void Hash::OneShotDigest(const FunctionCallbackInfo<Value>& args) {
   } else if (is_xof) {
     if (!args[6]->IsUndefined()) {
       output_length = args[6].As<Uint32>()->Value();
-    } else if (output_length == 0) {
-      // This is to handle OpenSSL 3.4's breaking change in SHAKE128/256
-      // default lengths
-      // TODO(@panva): remove this behaviour when DEP0198 is End-Of-Life
-      const char* name = OBJ_nid2sn(EVP_MD_type(md));
-      if (name != nullptr) {
-        if (strcmp(name, "SHAKE128") == 0) {
-          output_length = 16;
-        } else if (strcmp(name, "SHAKE256") == 0) {
-          output_length = 32;
-        }
-      }
+    } else if (ShouldRejectMissingXofLength(md, output_length)) {
+      MarkInvalidXofLength();
+      return ThrowCryptoError(
+          env, ERR_get_error(), "Digest method not supported");
     }
   }
 
@@ -387,6 +412,12 @@ void Hash::RegisterExternalReferences(ExternalReferenceRegistry* registry) {
 void Hash::New(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
 
+  Maybe<unsigned int> xof_md_len = Nothing<unsigned int>();
+  if (!args[1]->IsUndefined()) {
+    CHECK(args[1]->IsUint32());
+    xof_md_len = Just<unsigned int>(args[1].As<Uint32>()->Value());
+  }
+
   const Hash* orig = nullptr;
   const EVP_MD* md = nullptr;
   if (args[0]->IsObject()) {
@@ -397,12 +428,6 @@ void Hash::New(const FunctionCallbackInfo<Value>& args) {
     md = GetDigestImplementation(env, args[0], args[2], args[3]);
   }
 
-  Maybe<unsigned int> xof_md_len = Nothing<unsigned int>();
-  if (!args[1]->IsUndefined()) {
-    CHECK(args[1]->IsUint32());
-    xof_md_len = Just<unsigned int>(args[1].As<Uint32>()->Value());
-  }
-
   Hash* hash = new Hash(env, args.This());
   if (md == nullptr || !hash->HashInit(md, xof_md_len)) {
     return ThrowCryptoError(env, ERR_get_error(),
@@ -423,18 +448,11 @@ bool Hash::HashInit(const EVP_MD* md, Maybe<unsigned int> xof_md_len) {
 
   md_len_ = mdctx_.getDigestSize();
 
-  // This is to handle OpenSSL 3.4's breaking change in SHAKE128/256
-  // default lengths
-  // TODO(@panva): remove this behaviour when DEP0198 is End-Of-Life
-  if (mdctx_.hasXofFlag() && !xof_md_len.IsJust() && md_len_ == 0) {
-    const char* name = OBJ_nid2sn(EVP_MD_type(md));
-    if (name != nullptr) {
-      if (strcmp(name, "SHAKE128") == 0) {
-        md_len_ = 16;
-      } else if (strcmp(name, "SHAKE256") == 0) {
-        md_len_ = 32;
-      }
-    }
+  if (mdctx_.hasXofFlag() && !xof_md_len.IsJust() &&
+      ShouldRejectMissingXofLength(md, md_len_)) {
+    MarkInvalidXofLength();
+    mdctx_.reset();
+    return false;
   }
 
   if (xof_md_len.IsJust() && xof_md_len.FromJust() != md_len_) {

test/parallel/test-crypto-default-shake-lengths-oneshot.js

@@ -4,17 +4,34 @@ const common = require('../common');
 if (!common.hasCrypto)
   common.skip('missing crypto');
 
-if (process.features.openssl_is_boringssl)
-  common.skip('not supported by BoringSSL');
+const {
+  getHashes,
+  hash,
+} = require('crypto');
 
-const { hash } = require('crypto');
+if (!getHashes().includes('shake128'))
+  common.skip('unsupported shake128 test');
 
-common.expectWarning({
-  DeprecationWarning: {
-    DEP0198: 'Creating SHAKE128/256 digests without an explicit options.outputLength is deprecated.',
-  }
-});
+const assert = require('assert');
 
-{
-  hash('shake128', 'test');
+const invalidXofLength = {
+  code: 'ERR_OSSL_EVP_NOT_XOF_OR_INVALID_LENGTH',
+  name: 'Error',
+  message: /not XOF or invalid length/,
+};
+
+const shakeAlgorithms = [
+  'shake128',
+  'SHAKE128',
+  'shake256',
+  'SHAKE256',
+];
+
+for (const algorithm of shakeAlgorithms) {
+  assert.throws(() => hash(algorithm, 'test'), invalidXofLength);
+  assert.throws(() => hash(algorithm, 'test', 'hex'), invalidXofLength);
+  assert.throws(
+    () => hash(algorithm, 'test', { outputEncoding: 'buffer' }),
+    invalidXofLength);
+  assert.throws(() => hash(algorithm, 'test', {}), invalidXofLength);
 }

test/parallel/test-crypto-default-shake-lengths.js

@@ -4,19 +4,39 @@ const common = require('../common');
 if (!common.hasCrypto)
   common.skip('missing crypto');
 
-const crypto = require('crypto');
-if (!crypto.getHashes().includes('shake128')) {
+const {
+  createHash,
+  getHashes,
+} = require('crypto');
+
+if (!getHashes().includes('shake128'))
   common.skip('unsupported shake128 test');
-}
 
-const { createHash } = require('crypto');
+const assert = require('assert');
+
+const invalidXofLength = {
+  code: 'ERR_OSSL_EVP_NOT_XOF_OR_INVALID_LENGTH',
+  name: 'Error',
+  message: /not XOF or invalid length/,
+};
 
-common.expectWarning({
-  DeprecationWarning: {
-    DEP0198: 'Creating SHAKE128/256 digests without an explicit options.outputLength is deprecated.',
-  }
-});
+const shakeAlgorithms = [
+  'shake128',
+  'SHAKE128',
+  'shake256',
+  'SHAKE256',
+];
 
-{
-  createHash('shake128').update('test').digest();
+for (const algorithm of shakeAlgorithms) {
+  assert.throws(() => createHash(algorithm), invalidXofLength);
+  assert.throws(() => createHash(algorithm, null), invalidXofLength);
+  assert.throws(() => createHash(algorithm, {}), invalidXofLength);
 }
+
+const shake128 = createHash('shake128', { outputLength: 5 });
+const shake128Copy = shake128.copy({ outputLength: 5 });
+
+assert.throws(() => shake128.copy(), invalidXofLength);
+assert.throws(() => shake128.copy(null), invalidXofLength);
+assert.throws(() => shake128.copy({}), invalidXofLength);
+assert.throws(() => shake128Copy.copy(), invalidXofLength);

test/parallel/test-crypto-hash.js

@@ -8,10 +8,6 @@ common.expectWarning({
   DeprecationWarning: [
     ['crypto.Hash constructor is deprecated.',
      'DEP0179'],
-    ...(process.features.openssl_is_boringssl ? [] : [[
-      'Creating SHAKE128/256 digests without an explicit options.outputLength is deprecated.',
-      'DEP0198',
-    ]]),
   ]
 });
 
@@ -194,16 +190,29 @@ assert.throws(
 
 // Test XOF hash functions and the outputLength option.
 if (!process.features.openssl_is_boringssl) {
-  // Default outputLengths.
-  assert.strictEqual(crypto.createHash('shake128').digest('hex'),
-                     '7f9c2ba4e88f827d616045507605853e');
-  assert.strictEqual(crypto.createHash('shake128', null).digest('hex'),
+  const invalidXofLength = {
+    code: 'ERR_OSSL_EVP_NOT_XOF_OR_INVALID_LENGTH',
+    name: 'Error',
+    message: /not XOF or invalid length/,
+  };
+
+  assert.throws(() => crypto.createHash('shake128'), invalidXofLength);
+  assert.throws(() => crypto.createHash('shake128', null), invalidXofLength);
+  assert.throws(() => crypto.createHash('shake256'), invalidXofLength);
+  assert.throws(() => crypto.createHash('shake256', {}), invalidXofLength);
+
+  assert.strictEqual(crypto.createHash('shake128', { outputLength: 16 })
+                           .digest('hex'),
                      '7f9c2ba4e88f827d616045507605853e');
-  assert.strictEqual(crypto.createHash('shake256').digest('hex'),
+  assert.strictEqual(crypto.createHash('shake256', { outputLength: 32 })
+                           .digest('hex'),
                      '46b9dd2b0ba88d13233b3feb743eeb24' +
                      '3fcd52ea62b81b82b50c27646ed5762f');
-  assert.strictEqual(crypto.createHash('shake256', { outputLength: 0 })
-                           .copy()  // Default outputLength.
+  const shake256 = crypto.createHash('shake256', { outputLength: 0 });
+  assert.throws(() => shake256.copy(), invalidXofLength);
+  assert.throws(() => shake256.copy(null), invalidXofLength);
+  assert.throws(() => shake256.copy({}), invalidXofLength);
+  assert.strictEqual(shake256.copy({ outputLength: 32 })
                            .digest('hex'),
                      '46b9dd2b0ba88d13233b3feb743eeb24' +
                      '3fcd52ea62b81b82b50c27646ed5762f');