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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	crypto/crypto_random.cc	Lines:	102	118	86.4 %
Date:	2022-06-12 04:16:28	Branches:	49	86	57.0 %


#include "crypto/crypto_random.h"
#include "async_wrap-inl.h"
#include "crypto/crypto_util.h"
#include "env-inl.h"
#include "memory_tracker-inl.h"
#include "threadpoolwork-inl.h"
#include "v8.h"

#include <openssl/bn.h>
#include <openssl/rand.h>

namespace node {

using v8::ArrayBuffer;
using v8::BackingStore;
using v8::False;
using v8::FunctionCallbackInfo;
using v8::Just;
using v8::Local;
using v8::Maybe;
using v8::Nothing;
using v8::Object;
using v8::True;
using v8::Uint32;
using v8::Value;

namespace crypto {
Maybe<bool> RandomBytesTraits::EncodeOutput(
    Environment* env,
    const RandomBytesConfig& params,
    ByteSource* unused,
    v8::Local<v8::Value>* result) {
  *result = v8::Undefined(env->isolate());
  return Just(!result->IsEmpty());
}

Maybe<bool> RandomBytesTraits::AdditionalConfig(
    CryptoJobMode mode,
    const FunctionCallbackInfo<Value>& args,
    unsigned int offset,
    RandomBytesConfig* params) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(IsAnyByteSource(args[offset]));  // Buffer to fill
  CHECK(args[offset + 1]->IsUint32());  // Offset
  CHECK(args[offset + 2]->IsUint32());  // Size

  ArrayBufferOrViewContents<unsigned char> in(args[offset]);

  const uint32_t byte_offset = args[offset + 1].As<Uint32>()->Value();
  const uint32_t size = args[offset + 2].As<Uint32>()->Value();
  CHECK_GE(byte_offset + size, byte_offset);  // Overflow check.
  CHECK_LE(byte_offset + size, in.size());  // Bounds check.

  if (UNLIKELY(size > INT_MAX)) {
    THROW_ERR_OUT_OF_RANGE(env, "buffer is too large");
    return Nothing<bool>();
  }

  params->buffer = in.data() + byte_offset;
  params->size = size;

  return Just(true);
}

bool RandomBytesTraits::DeriveBits(
    Environment* env,
    const RandomBytesConfig& params,
    ByteSource* unused) {
  CheckEntropy();  // Ensure that OpenSSL's PRNG is properly seeded.
  return RAND_bytes(params.buffer, params.size) != 0;
}

void RandomPrimeConfig::MemoryInfo(MemoryTracker* tracker) const {
  tracker->TrackFieldWithSize("prime", prime ? bits * 8 : 0);
}

Maybe<bool> RandomPrimeTraits::EncodeOutput(
    Environment* env,
    const RandomPrimeConfig& params,
    ByteSource* unused,
    v8::Local<v8::Value>* result) {
  size_t size = BN_num_bytes(params.prime.get());
  std::shared_ptr<BackingStore> store =
      ArrayBuffer::NewBackingStore(env->isolate(), size);
  BN_bn2binpad(
      params.prime.get(),
      reinterpret_cast<unsigned char*>(store->Data()),
      size);
  *result = ArrayBuffer::New(env->isolate(), store);
  return Just(true);
}

Maybe<bool> RandomPrimeTraits::AdditionalConfig(
    CryptoJobMode mode,
    const FunctionCallbackInfo<Value>& args,
    unsigned int offset,
    RandomPrimeConfig* params) {
  ClearErrorOnReturn clear_error;
  Environment* env = Environment::GetCurrent(args);
  CHECK(args[offset]->IsUint32());  // Size
  CHECK(args[offset + 1]->IsBoolean());  // Safe

  const uint32_t size = args[offset].As<Uint32>()->Value();
  bool safe = args[offset + 1]->IsTrue();

  if (!args[offset + 2]->IsUndefined()) {
    ArrayBufferOrViewContents<unsigned char> add(args[offset + 2]);
    params->add.reset(BN_bin2bn(add.data(), add.size(), nullptr));
    if (!params->add) {
      THROW_ERR_CRYPTO_OPERATION_FAILED(env, "could not generate prime");
      return Nothing<bool>();
    }
  }

  if (!args[offset + 3]->IsUndefined()) {
    ArrayBufferOrViewContents<unsigned char> rem(args[offset + 3]);
    params->rem.reset(BN_bin2bn(rem.data(), rem.size(), nullptr));
    if (!params->rem) {
      THROW_ERR_CRYPTO_OPERATION_FAILED(env, "could not generate prime");
      return Nothing<bool>();
    }
  }

  // The JS interface already ensures that the (positive) size fits into an int.
  int bits = static_cast<int>(size);
  CHECK_GT(bits, 0);

  if (params->add) {
    if (BN_num_bits(params->add.get()) > bits) {
      // If we allowed this, the best case would be returning a static prime
      // that wasn't generated randomly. The worst case would be an infinite
      // loop within OpenSSL, blocking the main thread or one of the threads
      // in the thread pool.
      THROW_ERR_OUT_OF_RANGE(env, "invalid options.add");
      return Nothing<bool>();
    }

    if (params->rem) {
      if (BN_cmp(params->add.get(), params->rem.get()) != 1) {
        // This would definitely lead to an infinite loop if allowed since
        // OpenSSL does not check this condition.
        THROW_ERR_OUT_OF_RANGE(env, "invalid options.rem");
        return Nothing<bool>();
      }
    }
  }

  params->bits = bits;
  params->safe = safe;
  params->prime.reset(BN_secure_new());
  if (!params->prime) {
    THROW_ERR_CRYPTO_OPERATION_FAILED(env, "could not generate prime");
    return Nothing<bool>();
  }

  return Just(true);
}

bool RandomPrimeTraits::DeriveBits(
    Environment* env,
    const RandomPrimeConfig& params,
    ByteSource* unused) {

  CheckEntropy();

  if (BN_generate_prime_ex(
          params.prime.get(),
          params.bits,
          params.safe ? 1 : 0,
          params.add.get(),
          params.rem.get(),
          nullptr) == 0) {
    return false;
  }

  return true;
}

void CheckPrimeConfig::MemoryInfo(MemoryTracker* tracker) const {
  tracker->TrackFieldWithSize(
      "prime", candidate ? BN_num_bytes(candidate.get()) : 0);
}

Maybe<bool> CheckPrimeTraits::AdditionalConfig(
    CryptoJobMode mode,
    const FunctionCallbackInfo<Value>& args,
    unsigned int offset,
    CheckPrimeConfig* params) {
  Environment* env = Environment::GetCurrent(args);

  ArrayBufferOrViewContents<unsigned char> candidate(args[offset]);

  params->candidate =
      BignumPointer(BN_bin2bn(
          candidate.data(),
          candidate.size(),
          nullptr));

  CHECK(args[offset + 1]->IsUint32());  // Checks

  const int checks = static_cast<int>(args[offset + 1].As<Uint32>()->Value());
  if (checks < 0) {
    THROW_ERR_OUT_OF_RANGE(env, "invalid options.checks");
    return Nothing<bool>();
  }

  params->checks = checks;

  return Just(true);
}

bool CheckPrimeTraits::DeriveBits(
    Environment* env,
    const CheckPrimeConfig& params,
    ByteSource* out) {

  BignumCtxPointer ctx(BN_CTX_new());

  int ret = BN_is_prime_ex(
            params.candidate.get(),
            params.checks,
            ctx.get(),
            nullptr);
  if (ret < 0) return false;
  char* data = MallocOpenSSL<char>(1);
  data[0] = ret;
  *out = ByteSource::Allocated(data, 1);
  return true;
}

Maybe<bool> CheckPrimeTraits::EncodeOutput(
    Environment* env,
    const CheckPrimeConfig& params,
    ByteSource* out,
    v8::Local<v8::Value>* result) {
  *result = out->get()[0] ? True(env->isolate()) : False(env->isolate());
  return Just(true);
}

namespace Random {
void Initialize(Environment* env, Local<Object> target) {
  RandomBytesJob::Initialize(env, target);
  RandomPrimeJob::Initialize(env, target);
  CheckPrimeJob::Initialize(env, target);
}

void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
  RandomBytesJob::RegisterExternalReferences(registry);
  RandomPrimeJob::RegisterExternalReferences(registry);
  CheckPrimeJob::RegisterExternalReferences(registry);
}
}  // namespace Random
}  // namespace crypto
}  // namespace node


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			#include "crypto/crypto_random.h"
2			#include "async_wrap-inl.h"
3			#include "crypto/crypto_util.h"
4			#include "env-inl.h"
5			#include "memory_tracker-inl.h"
6			#include "threadpoolwork-inl.h"
7			#include "v8.h"
8
9			#include <openssl/bn.h>
10			#include <openssl/rand.h>
11
12			namespace node {
13
14			using v8::ArrayBuffer;
15			using v8::BackingStore;
16			using v8::False;
17			using v8::FunctionCallbackInfo;
18			using v8::Just;
19			using v8::Local;
20			using v8::Maybe;
21			using v8::Nothing;
22			using v8::Object;
23			using v8::True;
24			using v8::Uint32;
25			using v8::Value;
26
27			namespace crypto {
28		434	Maybe<bool> RandomBytesTraits::EncodeOutput(
29			Environment* env,
30			const RandomBytesConfig& params,
31			ByteSource* unused,
32			v8::Local<v8::Value>* result) {
33		868	*result = v8::Undefined(env->isolate());
34		434	return Just(!result->IsEmpty());
35			}
36
37		434	Maybe<bool> RandomBytesTraits::AdditionalConfig(
38			CryptoJobMode mode,
39			const FunctionCallbackInfo<Value>& args,
40			unsigned int offset,
41			RandomBytesConfig* params) {
42		434	Environment* env = Environment::GetCurrent(args);
43	✓✗✗✓	868	CHECK(IsAnyByteSource(args[offset])); // Buffer to fill
44	✓✗✗✓	868	CHECK(args[offset + 1]->IsUint32()); // Offset
45	✓✗✗✓	868	CHECK(args[offset + 2]->IsUint32()); // Size
46
47	✓✗	1302	ArrayBufferOrViewContents<unsigned char> in(args[offset]);
48
49	✓✗	1302	const uint32_t byte_offset = args[offset + 1].As<Uint32>()->Value();
50	✓✗	1302	const uint32_t size = args[offset + 2].As<Uint32>()->Value();
51	✗✓	434	CHECK_GE(byte_offset + size, byte_offset); // Overflow check.
52	✗✓	434	CHECK_LE(byte_offset + size, in.size()); // Bounds check.
53
54	✗✓	434	if (UNLIKELY(size > INT_MAX)) {
55			THROW_ERR_OUT_OF_RANGE(env, "buffer is too large");
56			return Nothing<bool>();
57			}
58
59		434	params->buffer = in.data() + byte_offset;
60		434	params->size = size;
61
62		434	return Just(true);
63			}
64
65		434	bool RandomBytesTraits::DeriveBits(
66			Environment* env,
67			const RandomBytesConfig& params,
68			ByteSource* unused) {
69		434	CheckEntropy(); // Ensure that OpenSSL's PRNG is properly seeded.
70		434	return RAND_bytes(params.buffer, params.size) != 0;
71			}
72
73			void RandomPrimeConfig::MemoryInfo(MemoryTracker* tracker) const {
74			tracker->TrackFieldWithSize("prime", prime ? bits * 8 : 0);
75			}
76
77		15	Maybe<bool> RandomPrimeTraits::EncodeOutput(
78			Environment* env,
79			const RandomPrimeConfig& params,
80			ByteSource* unused,
81			v8::Local<v8::Value>* result) {
82		15	size_t size = BN_num_bytes(params.prime.get());
83			std::shared_ptr<BackingStore> store =
84		15	ArrayBuffer::NewBackingStore(env->isolate(), size);
85		15	BN_bn2binpad(
86		15	params.prime.get(),
87		15	reinterpret_cast<unsigned char*>(store->Data()),
88			size);
89		30	*result = ArrayBuffer::New(env->isolate(), store);
90		15	return Just(true);
91			}
92
93		21	Maybe<bool> RandomPrimeTraits::AdditionalConfig(
94			CryptoJobMode mode,
95			const FunctionCallbackInfo<Value>& args,
96			unsigned int offset,
97			RandomPrimeConfig* params) {
98		21	ClearErrorOnReturn clear_error;
99		21	Environment* env = Environment::GetCurrent(args);
100	✓✗✗✓	42	CHECK(args[offset]->IsUint32()); // Size
101	✓✗✗✓	42	CHECK(args[offset + 1]->IsBoolean()); // Safe
102
103	✓✗	63	const uint32_t size = args[offset].As<Uint32>()->Value();
104	✓✗	42	bool safe = args[offset + 1]->IsTrue();
105
106	✓✗✓✓	63	if (!args[offset + 2]->IsUndefined()) {
107	✓✗	24	ArrayBufferOrViewContents<unsigned char> add(args[offset + 2]);
108		12	params->add.reset(BN_bin2bn(add.data(), add.size(), nullptr));
109	✗✓	12	if (!params->add) {
110			THROW_ERR_CRYPTO_OPERATION_FAILED(env, "could not generate prime");
111			return Nothing<bool>();
112			}
113			}
114
115	✓✗✓✓	63	if (!args[offset + 3]->IsUndefined()) {
116	✓✗	16	ArrayBufferOrViewContents<unsigned char> rem(args[offset + 3]);
117		8	params->rem.reset(BN_bin2bn(rem.data(), rem.size(), nullptr));
118	✗✓	8	if (!params->rem) {
119			THROW_ERR_CRYPTO_OPERATION_FAILED(env, "could not generate prime");
120			return Nothing<bool>();
121			}
122			}
123
124			// The JS interface already ensures that the (positive) size fits into an int.
125		21	int bits = static_cast<int>(size);
126	✗✓	21	CHECK_GT(bits, 0);
127
128	✓✓	21	if (params->add) {
129	✓✓	12	if (BN_num_bits(params->add.get()) > bits) {
130			// If we allowed this, the best case would be returning a static prime
131			// that wasn't generated randomly. The worst case would be an infinite
132			// loop within OpenSSL, blocking the main thread or one of the threads
133			// in the thread pool.
134		3	THROW_ERR_OUT_OF_RANGE(env, "invalid options.add");
135		3	return Nothing<bool>();
136			}
137
138	✓✓	9	if (params->rem) {
139	✓✓	7	if (BN_cmp(params->add.get(), params->rem.get()) != 1) {
140			// This would definitely lead to an infinite loop if allowed since
141			// OpenSSL does not check this condition.
142		3	THROW_ERR_OUT_OF_RANGE(env, "invalid options.rem");
143		3	return Nothing<bool>();
144			}
145			}
146			}
147
148		15	params->bits = bits;
149		15	params->safe = safe;
150		15	params->prime.reset(BN_secure_new());
151	✗✓	15	if (!params->prime) {
152			THROW_ERR_CRYPTO_OPERATION_FAILED(env, "could not generate prime");
153			return Nothing<bool>();
154			}
155
156		15	return Just(true);
157			}
158
159		15	bool RandomPrimeTraits::DeriveBits(
160			Environment* env,
161			const RandomPrimeConfig& params,
162			ByteSource* unused) {
163
164		15	CheckEntropy();
165
166		30	if (BN_generate_prime_ex(
167			params.prime.get(),
168		15	params.bits,
169	✓✓	15	params.safe ? 1 : 0,
170		15	params.add.get(),
171		15	params.rem.get(),
172	✗✓	15	nullptr) == 0) {
173			return false;
174			}
175
176		15	return true;
177			}
178
179			void CheckPrimeConfig::MemoryInfo(MemoryTracker* tracker) const {
180			tracker->TrackFieldWithSize(
181			"prime", candidate ? BN_num_bytes(candidate.get()) : 0);
182			}
183
184		24	Maybe<bool> CheckPrimeTraits::AdditionalConfig(
185			CryptoJobMode mode,
186			const FunctionCallbackInfo<Value>& args,
187			unsigned int offset,
188			CheckPrimeConfig* params) {
189		24	Environment* env = Environment::GetCurrent(args);
190
191	✓✗	72	ArrayBufferOrViewContents<unsigned char> candidate(args[offset]);
192
193			params->candidate =
194		48	BignumPointer(BN_bin2bn(
195		24	candidate.data(),
196		24	candidate.size(),
197		24	nullptr));
198
199	✓✗✗✓	48	CHECK(args[offset + 1]->IsUint32()); // Checks
200
201	✓✗	72	const int checks = static_cast<int>(args[offset + 1].As<Uint32>()->Value());
202	✗✓	24	if (checks < 0) {
203			THROW_ERR_OUT_OF_RANGE(env, "invalid options.checks");
204			return Nothing<bool>();
205			}
206
207		24	params->checks = checks;
208
209		24	return Just(true);
210			}
211
212		24	bool CheckPrimeTraits::DeriveBits(
213			Environment* env,
214			const CheckPrimeConfig& params,
215			ByteSource* out) {
216
217		48	BignumCtxPointer ctx(BN_CTX_new());
218
219		48	int ret = BN_is_prime_ex(
220		24	params.candidate.get(),
221		24	params.checks,
222			ctx.get(),
223			nullptr);
224	✗✓	24	if (ret < 0) return false;
225		24	char* data = MallocOpenSSL<char>(1);
226		24	data[0] = ret;
227		24	*out = ByteSource::Allocated(data, 1);
228		24	return true;
229			}
230
231		24	Maybe<bool> CheckPrimeTraits::EncodeOutput(
232			Environment* env,
233			const CheckPrimeConfig& params,
234			ByteSource* out,
235			v8::Local<v8::Value>* result) {
236	✓✓	24	*result = out->get()[0] ? True(env->isolate()) : False(env->isolate());
237		24	return Just(true);
238			}
239
240			namespace Random {
241		854	void Initialize(Environment* env, Local<Object> target) {
242		854	RandomBytesJob::Initialize(env, target);
243		854	RandomPrimeJob::Initialize(env, target);
244		854	CheckPrimeJob::Initialize(env, target);
245		854	}
246
247		5205	void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
248		5205	RandomBytesJob::RegisterExternalReferences(registry);
249		5205	RandomPrimeJob::RegisterExternalReferences(registry);
250		5205	CheckPrimeJob::RegisterExternalReferences(registry);
251		5205	}
252			} // namespace Random
253			} // namespace crypto
254			} // namespace node