GCC Code Coverage Report
Directory: ../ Exec Total Coverage
File: /home/iojs/build/workspace/node-test-commit-linux-coverage-daily/nodes/benchmark/out/../src/crypto/crypto_util.h Lines: 199 213 93.4 %
Date: 2021-01-16 04:10:54 Branches: 118 200 59.0 %

Line Branch Exec Source
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#ifndef SRC_CRYPTO_CRYPTO_UTIL_H_
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#define SRC_CRYPTO_CRYPTO_UTIL_H_
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4
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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6
#include "env.h"
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#include "async_wrap.h"
8
#include "allocated_buffer.h"
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#include "node_errors.h"
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#include "node_internals.h"
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#include "util.h"
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#include "v8.h"
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#include "string_bytes.h"
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15
#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/ec.h>
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#include <openssl/kdf.h>
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#include <openssl/rsa.h>
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#include <openssl/dsa.h>
21
#include <openssl/ssl.h>
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#ifndef OPENSSL_NO_ENGINE
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#  include <openssl/engine.h>
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#endif  // !OPENSSL_NO_ENGINE
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26
#include <algorithm>
27
#include <memory>
28
#include <string>
29
#include <vector>
30
#include <climits>
31
#include <cstdio>
32
33
namespace node {
34
namespace crypto {
35
// Currently known sizes of commonly used OpenSSL struct sizes.
36
// OpenSSL considers it's various structs to be opaque and the
37
// sizes may change from one version of OpenSSL to another, so
38
// these values should not be trusted to remain static. These
39
// are provided to allow for some close to reasonable memory
40
// tracking.
41
constexpr size_t kSizeOf_DH = 144;
42
constexpr size_t kSizeOf_EC_KEY = 80;
43
constexpr size_t kSizeOf_EVP_CIPHER_CTX = 168;
44
constexpr size_t kSizeOf_EVP_MD_CTX = 48;
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constexpr size_t kSizeOf_EVP_PKEY = 72;
46
constexpr size_t kSizeOf_EVP_PKEY_CTX = 80;
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constexpr size_t kSizeOf_HMAC_CTX = 32;
48
49
// Define smart pointers for the most commonly used OpenSSL types:
50
using X509Pointer = DeleteFnPtr<X509, X509_free>;
51
using BIOPointer = DeleteFnPtr<BIO, BIO_free_all>;
52
using SSLCtxPointer = DeleteFnPtr<SSL_CTX, SSL_CTX_free>;
53
using SSLSessionPointer = DeleteFnPtr<SSL_SESSION, SSL_SESSION_free>;
54
using SSLPointer = DeleteFnPtr<SSL, SSL_free>;
55
using PKCS8Pointer = DeleteFnPtr<PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO_free>;
56
using EVPKeyPointer = DeleteFnPtr<EVP_PKEY, EVP_PKEY_free>;
57
using EVPKeyCtxPointer = DeleteFnPtr<EVP_PKEY_CTX, EVP_PKEY_CTX_free>;
58
using EVPMDPointer = DeleteFnPtr<EVP_MD_CTX, EVP_MD_CTX_free>;
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using RSAPointer = DeleteFnPtr<RSA, RSA_free>;
60
using ECPointer = DeleteFnPtr<EC_KEY, EC_KEY_free>;
61
using BignumPointer = DeleteFnPtr<BIGNUM, BN_free>;
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using NetscapeSPKIPointer = DeleteFnPtr<NETSCAPE_SPKI, NETSCAPE_SPKI_free>;
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using ECGroupPointer = DeleteFnPtr<EC_GROUP, EC_GROUP_free>;
64
using ECPointPointer = DeleteFnPtr<EC_POINT, EC_POINT_free>;
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using ECKeyPointer = DeleteFnPtr<EC_KEY, EC_KEY_free>;
66
using DHPointer = DeleteFnPtr<DH, DH_free>;
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using ECDSASigPointer = DeleteFnPtr<ECDSA_SIG, ECDSA_SIG_free>;
68
using HMACCtxPointer = DeleteFnPtr<HMAC_CTX, HMAC_CTX_free>;
69
using CipherCtxPointer = DeleteFnPtr<EVP_CIPHER_CTX, EVP_CIPHER_CTX_free>;
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using RsaPointer = DeleteFnPtr<RSA, RSA_free>;
71
using DsaPointer = DeleteFnPtr<DSA, DSA_free>;
72
using EcdsaSigPointer = DeleteFnPtr<ECDSA_SIG, ECDSA_SIG_free>;
73
74
// Our custom implementation of the certificate verify callback
75
// used when establishing a TLS handshake. Because we cannot perform
76
// I/O quickly enough with X509_STORE_CTX_ APIs in this callback,
77
// we ignore preverify_ok errors here and let the handshake continue.
78
// In other words, this VerifyCallback is a non-op. It is imperative
79
// that the user user Connection::VerifyError after the `secure`
80
// callback has been made.
81
extern int VerifyCallback(int preverify_ok, X509_STORE_CTX* ctx);
82
83
void InitCryptoOnce();
84
85
void InitCrypto(v8::Local<v8::Object> target);
86
87
extern void UseExtraCaCerts(const std::string& file);
88
89
// Forcibly clear OpenSSL's error stack on return. This stops stale errors
90
// from popping up later in the lifecycle of crypto operations where they
91
// would cause spurious failures. It's a rather blunt method, though.
92
// ERR_clear_error() isn't necessarily cheap either.
93
struct ClearErrorOnReturn {
94
8602
  ~ClearErrorOnReturn() { ERR_clear_error(); }
95
};
96
97
// Pop errors from OpenSSL's error stack that were added
98
// between when this was constructed and destructed.
99
struct MarkPopErrorOnReturn {
100
20186
  MarkPopErrorOnReturn() { ERR_set_mark(); }
101
20185
  ~MarkPopErrorOnReturn() { ERR_pop_to_mark(); }
102
};
103
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// Ensure that OpenSSL has enough entropy (at least 256 bits) for its PRNG.
105
// The entropy pool starts out empty and needs to fill up before the PRNG
106
// can be used securely.  Once the pool is filled, it never dries up again;
107
// its contents is stirred and reused when necessary.
108
//
109
// OpenSSL normally fills the pool automatically but not when someone starts
110
// generating random numbers before the pool is full: in that case OpenSSL
111
// keeps lowering the entropy estimate to thwart attackers trying to guess
112
// the initial state of the PRNG.
113
//
114
// When that happens, we will have to wait until enough entropy is available.
115
// That should normally never take longer than a few milliseconds.
116
//
117
// OpenSSL draws from /dev/random and /dev/urandom.  While /dev/random may
118
// block pending "true" randomness, /dev/urandom is a CSPRNG that doesn't
119
// block under normal circumstances.
120
//
121
// The only time when /dev/urandom may conceivably block is right after boot,
122
// when the whole system is still low on entropy.  That's not something we can
123
// do anything about.
124
void CheckEntropy();
125
126
// Generate length bytes of random data. If this returns false, the data
127
// may not be truly random but it's still generally good enough.
128
bool EntropySource(unsigned char* buffer, size_t length);
129
130
int PasswordCallback(char* buf, int size, int rwflag, void* u);
131
132
int NoPasswordCallback(char* buf, int size, int rwflag, void* u);
133
134
// Decode is used by the various stream-based crypto utilities to decode
135
// string input.
136
template <typename T>
137
11691
void Decode(const v8::FunctionCallbackInfo<v8::Value>& args,
138
            void (*callback)(T*, const v8::FunctionCallbackInfo<v8::Value>&,
139
                             const char*, size_t)) {
140
  T* ctx;
141

11691
  ASSIGN_OR_RETURN_UNWRAP(&ctx, args.Holder());
142
143

35073
  if (args[0]->IsString()) {
144
20634
    StringBytes::InlineDecoder decoder;
145
10317
    Environment* env = Environment::GetCurrent(args);
146
10317
    enum encoding enc = ParseEncoding(env->isolate(), args[1], UTF8);
147

30951
    if (decoder.Decode(env, args[0].As<v8::String>(), enc).IsNothing())
148
      return;
149

10317
    callback(ctx, args, decoder.out(), decoder.size());
150
  } else {
151
1374
    ArrayBufferViewContents<char> buf(args[0]);
152
1374
    callback(ctx, args, buf.data(), buf.length());
153
  }
154
}
155
156
// Utility struct used to harvest error information from openssl's error stack
157
7111
struct CryptoErrorVector : public std::vector<std::string> {
158
  void Capture();
159
160
  v8::MaybeLocal<v8::Value> ToException(
161
      Environment* env,
162
      v8::Local<v8::String> exception_string = v8::Local<v8::String>()) const;
163
};
164
165
template <typename T>
166
19625
T* MallocOpenSSL(size_t count) {
167
19625
  void* mem = OPENSSL_malloc(MultiplyWithOverflowCheck(count, sizeof(T)));
168


19623
  CHECK_IMPLIES(mem == nullptr, count == 0);
169
19623
  return static_cast<T*>(mem);
170
}
171
172
template <typename T>
173
439
T* ReallocOpenSSL(T* buf, size_t count) {
174
439
  void* mem = OPENSSL_realloc(buf, MultiplyWithOverflowCheck(count, sizeof(T)));
175

439
  CHECK_IMPLIES(mem == nullptr, count == 0);
176
439
  return static_cast<T*>(mem);
177
}
178
179
// A helper class representing a read-only byte array. When deallocated, its
180
// contents are zeroed.
181
class ByteSource {
182
 public:
183
22654
  ByteSource() = default;
184
  ByteSource(ByteSource&& other) noexcept;
185
  ~ByteSource();
186
187
  ByteSource& operator=(ByteSource&& other) noexcept;
188
189
  const char* get() const;
190
191
  template <typename T>
192
3816
  const T* data() const { return reinterpret_cast<const T*>(get()); }
193
194
  size_t size() const;
195
196
13177
  operator bool() const { return data_ != nullptr; }
197
198
1073
  BignumPointer ToBN() const {
199
    return BignumPointer(BN_bin2bn(
200
1073
        reinterpret_cast<const unsigned char*>(get()),
201
1073
        size(),
202
2146
        nullptr));
203
  }
204
205
  // Creates a v8::BackingStore that takes over responsibility for
206
  // any allocated data. The ByteSource will be reset with size = 0
207
  // after being called.
208
  std::unique_ptr<v8::BackingStore> ReleaseToBackingStore();
209
210
  v8::Local<v8::ArrayBuffer> ToArrayBuffer(Environment* env);
211
212
  void reset();
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214
  // Allows an Allocated ByteSource to be truncated.
215
439
  void Resize(size_t newsize) {
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439
    CHECK_LE(newsize, size_);
217
439
    CHECK_NOT_NULL(allocated_data_);
218
439
    char* new_data_ = ReallocOpenSSL<char>(allocated_data_, newsize);
219
439
    data_ = allocated_data_ = new_data_;
220
439
    size_ = newsize;
221
439
  }
222
223
  static ByteSource Allocated(char* data, size_t size);
224
  static ByteSource Foreign(const char* data, size_t size);
225
226
  static ByteSource FromEncodedString(Environment* env,
227
                                      v8::Local<v8::String> value,
228
                                      enum encoding enc = BASE64);
229
230
  static ByteSource FromStringOrBuffer(Environment* env,
231
                                       v8::Local<v8::Value> value);
232
233
  static ByteSource FromString(Environment* env,
234
                               v8::Local<v8::String> str,
235
                               bool ntc = false);
236
237
  static ByteSource FromBuffer(v8::Local<v8::Value> buffer,
238
                               bool ntc = false);
239
240
  static ByteSource FromBIO(const BIOPointer& bio);
241
242
  static ByteSource NullTerminatedCopy(Environment* env,
243
                                       v8::Local<v8::Value> value);
244
245
  static ByteSource FromSymmetricKeyObjectHandle(v8::Local<v8::Value> handle);
246
247
  ByteSource(const ByteSource&) = delete;
248
  ByteSource& operator=(const ByteSource&) = delete;
249
250
  static ByteSource FromSecretKeyBytes(
251
      Environment* env, v8::Local<v8::Value> value);
252
253
 private:
254
  const char* data_ = nullptr;
255
  char* allocated_data_ = nullptr;
256
  size_t size_ = 0;
257
258
  ByteSource(const char* data, char* allocated_data, size_t size);
259
};
260
261
enum CryptoJobMode {
262
  kCryptoJobAsync,
263
  kCryptoJobSync
264
};
265
266
CryptoJobMode GetCryptoJobMode(v8::Local<v8::Value> args);
267
268
template <typename CryptoJobTraits>
269
3459
class CryptoJob : public AsyncWrap, public ThreadPoolWork {
270
 public:
271
  using AdditionalParams = typename CryptoJobTraits::AdditionalParameters;
272
273
3460
  explicit CryptoJob(
274
      Environment* env,
275
      v8::Local<v8::Object> object,
276
      AsyncWrap::ProviderType type,
277
      CryptoJobMode mode,
278
      AdditionalParams&& params)
279
      : AsyncWrap(env, object, type),
280
        ThreadPoolWork(env),
281
        mode_(mode),
282
3460
        params_(std::move(params)) {
283
    // If the CryptoJob is async, then the instance will be
284
    // cleaned up when AfterThreadPoolWork is called.
285

3460
    if (mode == kCryptoJobSync) MakeWeak();
286
3460
  }
287
288
  bool IsNotIndicativeOfMemoryLeakAtExit() const override {
289
    // CryptoJobs run a work in the libuv thread pool and may still
290
    // exist when the event loop empties and starts to exit.
291
    return true;
292
  }
293
294
3068
  void AfterThreadPoolWork(int status) override {
295
3068
    Environment* env = AsyncWrap::env();
296

3068
    CHECK_EQ(mode_, kCryptoJobAsync);
297



3068
    CHECK(status == 0 || status == UV_ECANCELED);
298
6136
    std::unique_ptr<CryptoJob> ptr(this);
299
    // If the job was canceled do not execute the callback.
300
    // TODO(@jasnell): We should likely revisit skipping the
301
    // callback on cancel as that could leave the JS in a pending
302
    // state (e.g. unresolved promises...)
303

3068
    if (status == UV_ECANCELED) return;
304

6136
    v8::HandleScope handle_scope(env->isolate());
305
3068
    v8::Context::Scope context_scope(env->context());
306

9204
    v8::Local<v8::Value> args[2];
307

6136
    if (ptr->ToResult(&args[0], &args[1]).FromJust())
308
3068
      ptr->MakeCallback(env->ondone_string(), arraysize(args), args);
309
  }
310
311
  virtual v8::Maybe<bool> ToResult(
312
      v8::Local<v8::Value>* err,
313
      v8::Local<v8::Value>* result) = 0;
314
315
3457
  CryptoJobMode mode() const { return mode_; }
316
317
3474
  CryptoErrorVector* errors() { return &errors_; }
318
319
6241
  AdditionalParams* params() { return &params_; }
320
321
3
  std::string MemoryInfoName() const override {
322
3
    return CryptoJobTraits::JobName;
323
  }
324
325
3
  void MemoryInfo(MemoryTracker* tracker) const override {
326
3
    tracker->TrackField("params", params_);
327
3
    tracker->TrackField("errors", errors_);
328
3
  }
329
330
3457
  static void Run(const v8::FunctionCallbackInfo<v8::Value>& args) {
331
3457
    Environment* env = Environment::GetCurrent(args);
332
333
    CryptoJob<CryptoJobTraits>* job;
334

6526
    ASSIGN_OR_RETURN_UNWRAP(&job, args.Holder());
335

3457
    if (job->mode() == kCryptoJobAsync)
336
3069
      return job->ScheduleWork();
337
338

1164
    v8::Local<v8::Value> ret[2];
339
388
    env->PrintSyncTrace();
340
388
    job->DoThreadPoolWork();
341

776
    if (job->ToResult(&ret[0], &ret[1]).FromJust()) {
342
1164
      args.GetReturnValue().Set(
343
          v8::Array::New(env->isolate(), ret, arraysize(ret)));
344
    }
345
  }
346
347
13923
  static void Initialize(
348
      v8::FunctionCallback new_fn,
349
      Environment* env,
350
      v8::Local<v8::Object> target) {
351
13923
    v8::Local<v8::FunctionTemplate> job = env->NewFunctionTemplate(new_fn);
352
27846
    job->Inherit(AsyncWrap::GetConstructorTemplate(env));
353
27846
    job->InstanceTemplate()->SetInternalFieldCount(
354
        AsyncWrap::kInternalFieldCount);
355
13923
    env->SetProtoMethod(job, "run", Run);
356
13923
    env->SetConstructorFunction(target, CryptoJobTraits::JobName, job);
357
13923
  }
358
359
 private:
360
  const CryptoJobMode mode_;
361
  CryptoErrorVector errors_;
362
  AdditionalParams params_;
363
};
364
365
template <typename DeriveBitsTraits>
366
5130
class DeriveBitsJob final : public CryptoJob<DeriveBitsTraits> {
367
 public:
368
  using AdditionalParams = typename DeriveBitsTraits::AdditionalParameters;
369
370
2584
  static void New(const v8::FunctionCallbackInfo<v8::Value>& args) {
371
2584
    Environment* env = Environment::GetCurrent(args);
372
373
2584
    CryptoJobMode mode = GetCryptoJobMode(args[0]);
374
375
5149
    AdditionalParams params;
376

5168
    if (DeriveBitsTraits::AdditionalConfig(mode, args, 1, &params)
377
            .IsNothing()) {
378
      // The DeriveBitsTraits::AdditionalConfig is responsible for
379
      // calling an appropriate THROW_CRYPTO_* variant reporting
380
      // whatever error caused initialization to fail.
381
19
      return;
382
    }
383
384

2565
    new DeriveBitsJob(env, args.This(), mode, std::move(params));
385
  }
386
387
5967
  static void Initialize(
388
      Environment* env,
389
      v8::Local<v8::Object> target) {
390
5967
    CryptoJob<DeriveBitsTraits>::Initialize(New, env, target);
391
5967
  }
392
393
2565
  DeriveBitsJob(
394
      Environment* env,
395
      v8::Local<v8::Object> object,
396
      CryptoJobMode mode,
397
      AdditionalParams&& params)
398
      : CryptoJob<DeriveBitsTraits>(
399
            env,
400
            object,
401
            DeriveBitsTraits::Provider,
402
            mode,
403
2565
            std::move(params)) {}
404
405
2565
  void DoThreadPoolWork() override {
406

5130
    if (!DeriveBitsTraits::DeriveBits(
407
            AsyncWrap::env(),
408
2565
            *CryptoJob<DeriveBitsTraits>::params(), &out_)) {
409
      CryptoErrorVector* errors = CryptoJob<DeriveBitsTraits>::errors();
410
      errors->Capture();
411
      if (errors->empty())
412
        errors->push_back("Deriving bits failed");
413
      return;
414
    }
415
2565
    success_ = true;
416
  }
417
418
2565
  v8::Maybe<bool> ToResult(
419
      v8::Local<v8::Value>* err,
420
      v8::Local<v8::Value>* result) override {
421
2565
    Environment* env = AsyncWrap::env();
422
2565
    CryptoErrorVector* errors = CryptoJob<DeriveBitsTraits>::errors();
423

2565
    if (success_) {
424

2565
      CHECK(errors->empty());
425
5130
      *err = v8::Undefined(env->isolate());
426
2565
      return DeriveBitsTraits::EncodeOutput(
427
          env,
428
2565
          *CryptoJob<DeriveBitsTraits>::params(),
429
          &out_,
430
2565
          result);
431
    }
432
433
    if (errors->empty())
434
      errors->Capture();
435
    CHECK(!errors->empty());
436
    *result = v8::Undefined(env->isolate());
437
    return v8::Just(errors->ToException(env).ToLocal(err));
438
  }
439
440
3
  SET_SELF_SIZE(DeriveBitsJob);
441
3
  void MemoryInfo(MemoryTracker* tracker) const override {
442
3
    tracker->TrackFieldWithSize("out", out_.size());
443
3
    CryptoJob<DeriveBitsTraits>::MemoryInfo(tracker);
444
3
  }
445
446
 private:
447
  ByteSource out_;
448
  bool success_ = false;
449
};
450
451
void ThrowCryptoError(Environment* env,
452
                      unsigned long err,  // NOLINT(runtime/int)
453
                      const char* message = nullptr);
454
455
#ifndef OPENSSL_NO_ENGINE
456
struct EnginePointer {
457
  ENGINE* engine = nullptr;
458
  bool finish_on_exit = false;
459
460
2332
  inline EnginePointer() = default;
461
462
4
  inline explicit EnginePointer(ENGINE* engine_, bool finish_on_exit_ = false)
463
4
    : engine(engine_),
464
4
      finish_on_exit(finish_on_exit_) {}
465
466
2
  inline EnginePointer(EnginePointer&& other) noexcept
467
2
      : engine(other.engine),
468
2
        finish_on_exit(other.finish_on_exit) {
469
2
    other.release();
470
2
  }
471
472
2316
  inline ~EnginePointer() { reset(); }
473
474
2
  inline EnginePointer& operator=(EnginePointer&& other) noexcept {
475
2
    if (this == &other) return *this;
476
2
    this->~EnginePointer();
477
2
    return *new (this) EnginePointer(std::move(other));
478
  }
479
480
8
  inline operator bool() const { return engine != nullptr; }
481
482
4
  inline ENGINE* get() { return engine; }
483
484
2318
  inline void reset(ENGINE* engine_ = nullptr, bool finish_on_exit_ = false) {
485
2318
    if (engine != nullptr) {
486
2
      if (finish_on_exit)
487
        ENGINE_finish(engine);
488
2
      ENGINE_free(engine);
489
    }
490
2318
    engine = engine_;
491
2318
    finish_on_exit = finish_on_exit_;
492
2318
  }
493
494
2
  inline ENGINE* release() {
495
2
    ENGINE* ret = engine;
496
2
    engine = nullptr;
497
2
    finish_on_exit = false;
498
2
    return ret;
499
  }
500
};
501
502
EnginePointer LoadEngineById(const char* id, CryptoErrorVector* errors);
503
504
bool SetEngine(
505
    const char* id,
506
    uint32_t flags,
507
    CryptoErrorVector* errors = nullptr);
508
509
void SetEngine(const v8::FunctionCallbackInfo<v8::Value>& args);
510
#endif  // !OPENSSL_NO_ENGINE
511
512
#ifdef NODE_FIPS_MODE
513
void GetFipsCrypto(const v8::FunctionCallbackInfo<v8::Value>& args);
514
515
void SetFipsCrypto(const v8::FunctionCallbackInfo<v8::Value>& args);
516
#endif /* NODE_FIPS_MODE */
517
518
10
class CipherPushContext {
519
 public:
520
10
  inline explicit CipherPushContext(Environment* env) : env_(env) {}
521
522
938
  inline void push_back(const char* str) {
523
938
    list_.emplace_back(OneByteString(env_->isolate(), str));
524
938
  }
525
526
10
  inline v8::Local<v8::Array> ToJSArray() {
527
10
    return v8::Array::New(env_->isolate(), list_.data(), list_.size());
528
  }
529
530
 private:
531
  std::vector<v8::Local<v8::Value>> list_;
532
  Environment* env_;
533
};
534
535
template <class TypeName>
536
938
void array_push_back(const TypeName* md,
537
                     const char* from,
538
                     const char* to,
539
                     void* arg) {
540
938
  static_cast<CipherPushContext*>(arg)->push_back(from);
541
938
}
542
543
122983
inline bool IsAnyByteSource(v8::Local<v8::Value> arg) {
544
126997
  return arg->IsArrayBufferView() ||
545

129086
         arg->IsArrayBuffer() ||
546
125072
         arg->IsSharedArrayBuffer();
547
}
548
549
template <typename T>
550
116392
class ArrayBufferOrViewContents {
551
 public:
552
  ArrayBufferOrViewContents() = default;
553
554
113890
  inline explicit ArrayBufferOrViewContents(v8::Local<v8::Value> buf) {
555

113890
    CHECK(IsAnyByteSource(buf));
556

113890
    if (buf->IsArrayBufferView()) {
557
112549
      auto view = buf.As<v8::ArrayBufferView>();
558
112549
      offset_ = view->ByteOffset();
559
112549
      length_ = view->ByteLength();
560
225098
      store_ = view->Buffer()->GetBackingStore();
561

1341
    } else if (buf->IsArrayBuffer()) {
562
1323
      auto ab = buf.As<v8::ArrayBuffer>();
563
1323
      offset_ = 0;
564
1323
      length_ = ab->ByteLength();
565
1323
      store_ = ab->GetBackingStore();
566
    } else {
567
18
      auto sab = buf.As<v8::SharedArrayBuffer>();
568
18
      offset_ = 0;
569
18
      length_ = sab->ByteLength();
570
18
      store_ = sab->GetBackingStore();
571
    }
572
113890
  }
573
574
9577
  inline const T* data() const {
575
    // Ideally, these would return nullptr if IsEmpty() or length_ is zero,
576
    // but some of the openssl API react badly if given a nullptr even when
577
    // length is zero, so we have to return something.
578

9577
    if (size() == 0)
579
54
      return &buf;
580
9523
    return reinterpret_cast<T*>(store_->Data()) + offset_;
581
  }
582
583
103373
  inline T* data() {
584
    // Ideally, these would return nullptr if IsEmpty() or length_ is zero,
585
    // but some of the openssl API react badly if given a nullptr even when
586
    // length is zero, so we have to return something.
587

103373
    if (size() == 0)
588
33
      return &buf;
589
103340
    return reinterpret_cast<T*>(store_->Data()) + offset_;
590
  }
591
592
355056
  inline size_t size() const { return length_; }
593
594
  // In most cases, input buffer sizes passed in to openssl need to
595
  // be limited to <= INT_MAX. This utility method helps us check.
596
109853
  inline bool CheckSizeInt32() { return size() <= INT_MAX; }
597
598
2826
  inline ByteSource ToByteSource() const {
599
2826
    return ByteSource::Foreign(data(), size());
600
  }
601
602
6164
  inline ByteSource ToCopy() const {
603
6164
    if (size() == 0) return ByteSource();
604
5370
    char* buf = MallocOpenSSL<char>(size());
605
5370
    CHECK_NOT_NULL(buf);
606
5370
    memcpy(buf, data(), size());
607
5370
    return ByteSource::Allocated(buf, size());
608
  }
609
610
94
  inline ByteSource ToNullTerminatedCopy() const {
611
94
    if (size() == 0) return ByteSource();
612
88
    char* buf = MallocOpenSSL<char>(size() + 1);
613
88
    CHECK_NOT_NULL(buf);
614
88
    buf[size()] = 0;
615
88
    memcpy(buf, data(), size());
616
88
    return ByteSource::Allocated(buf, size());
617
  }
618
619
  template <typename M>
620
85
  void CopyTo(M* dest, size_t len) const {
621
    static_assert(sizeof(M) == 1, "sizeof(M) must equal 1");
622
85
    len = std::min(len, size());
623

85
    if (len > 0 && data() != nullptr)
624
85
      memcpy(dest, data(), len);
625
85
  }
626
627
 private:
628
  T buf = 0;
629
  size_t offset_ = 0;
630
  size_t length_ = 0;
631
  std::shared_ptr<v8::BackingStore> store_;
632
};
633
634
template <typename T>
635
std::vector<T> CopyBuffer(const ArrayBufferOrViewContents<T>& buf) {
636
  std::vector<T> vec;
637
  vec->resize(buf.size());
638
  if (vec->size() > 0 && buf.data() != nullptr)
639
    memcpy(vec->data(), buf.data(), vec->size());
640
  return vec;
641
}
642
643
template <typename T>
644
std::vector<T> CopyBuffer(v8::Local<v8::Value> buf) {
645
  return CopyBuffer(ArrayBufferOrViewContents<T>(buf));
646
}
647
648
v8::MaybeLocal<v8::Value> EncodeBignum(
649
    Environment* env,
650
    const BIGNUM* bn,
651
    v8::Local<v8::Value>* error);
652
653
v8::Maybe<bool> SetEncodedValue(
654
    Environment* env,
655
    v8::Local<v8::Object> target,
656
    v8::Local<v8::String> name,
657
    const BIGNUM* bn,
658
    int size = 0);
659
660
namespace Util {
661
void Initialize(Environment* env, v8::Local<v8::Object> target);
662
}  // namespace Util
663
664
}  // namespace crypto
665
}  // namespace node
666
667
#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
668
#endif  // SRC_CRYPTO_CRYPTO_UTIL_H_