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#include "crypto/crypto_sig.h"
#include "crypto/crypto_ecdh.h"
#include "crypto/crypto_keys.h"
#include "crypto/crypto_util.h"
#include "allocated_buffer-inl.h"
#include "async_wrap-inl.h"
#include "base_object-inl.h"
#include "env-inl.h"
#include "memory_tracker-inl.h"
#include "threadpoolwork-inl.h"
#include "v8.h"
namespace node {
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::Int32;
using v8::Just;
using v8::Local;
using v8::Maybe;
using v8::Nothing;
using v8::Object;
using v8::Uint32;
using v8::Value;
namespace crypto {
namespace {
bool ValidateDSAParameters(EVP_PKEY* key) {
#ifdef NODE_FIPS_MODE
/* Validate DSA2 parameters from FIPS 186-4 */
if (FIPS_mode() && EVP_PKEY_DSA == EVP_PKEY_base_id(key)) {
DSA* dsa = EVP_PKEY_get0_DSA(key);
const BIGNUM* p;
DSA_get0_pqg(dsa, &p, nullptr, nullptr);
size_t L = BN_num_bits(p);
const BIGNUM* q;
DSA_get0_pqg(dsa, nullptr, &q, nullptr);
size_t N = BN_num_bits(q);
return (L == 1024 && N == 160) ||
(L == 2048 && N == 224) ||
(L == 2048 && N == 256) ||
(L == 3072 && N == 256);
}
#endif // NODE_FIPS_MODE
return true;
}
bool ApplyRSAOptions(const ManagedEVPPKey& pkey,
EVP_PKEY_CTX* pkctx,
int padding,
const Maybe<int>& salt_len) {
if (EVP_PKEY_id(pkey.get()) == EVP_PKEY_RSA ||
EVP_PKEY_id(pkey.get()) == EVP_PKEY_RSA2 ||
EVP_PKEY_id(pkey.get()) == EVP_PKEY_RSA_PSS) {
if (EVP_PKEY_CTX_set_rsa_padding(pkctx, padding) <= 0)
return false;
if (padding == RSA_PKCS1_PSS_PADDING && salt_len.IsJust()) {
if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, salt_len.FromJust()) <= 0)
return false;
}
}
return true;
}
AllocatedBuffer Node_SignFinal(Environment* env,
EVPMDPointer&& mdctx,
const ManagedEVPPKey& pkey,
int padding,
Maybe<int> pss_salt_len) {
unsigned char m[EVP_MAX_MD_SIZE];
unsigned int m_len;
if (!EVP_DigestFinal_ex(mdctx.get(), m, &m_len))
return AllocatedBuffer();
int signed_sig_len = EVP_PKEY_size(pkey.get());
CHECK_GE(signed_sig_len, 0);
size_t sig_len = static_cast<size_t>(signed_sig_len);
AllocatedBuffer sig = AllocatedBuffer::AllocateManaged(env, sig_len);
unsigned char* ptr = reinterpret_cast<unsigned char*>(sig.data());
EVPKeyCtxPointer pkctx(EVP_PKEY_CTX_new(pkey.get(), nullptr));
if (pkctx &&
EVP_PKEY_sign_init(pkctx.get()) &&
ApplyRSAOptions(pkey, pkctx.get(), padding, pss_salt_len) &&
EVP_PKEY_CTX_set_signature_md(pkctx.get(), EVP_MD_CTX_md(mdctx.get())) &&
EVP_PKEY_sign(pkctx.get(), ptr, &sig_len, m, m_len)) {
sig.Resize(sig_len);
return sig;
}
return AllocatedBuffer();
}
int GetDefaultSignPadding(const ManagedEVPPKey& key) {
return EVP_PKEY_id(key.get()) == EVP_PKEY_RSA_PSS ? RSA_PKCS1_PSS_PADDING :
RSA_PKCS1_PADDING;
}
unsigned int GetBytesOfRS(const ManagedEVPPKey& pkey) {
int bits, base_id = EVP_PKEY_base_id(pkey.get());
if (base_id == EVP_PKEY_DSA) {
DSA* dsa_key = EVP_PKEY_get0_DSA(pkey.get());
// Both r and s are computed mod q, so their width is limited by that of q.
bits = BN_num_bits(DSA_get0_q(dsa_key));
} else if (base_id == EVP_PKEY_EC) {
EC_KEY* ec_key = EVP_PKEY_get0_EC_KEY(pkey.get());
const EC_GROUP* ec_group = EC_KEY_get0_group(ec_key);
bits = EC_GROUP_order_bits(ec_group);
} else {
return kNoDsaSignature;
}
return (bits + 7) / 8;
}
// Returns the maximum size of each of the integers (r, s) of the DSA signature.
AllocatedBuffer ConvertSignatureToP1363(Environment* env,
const ManagedEVPPKey& pkey,
AllocatedBuffer&& signature) {
unsigned int n = GetBytesOfRS(pkey);
if (n == kNoDsaSignature)
return std::move(signature);
const unsigned char* sig_data =
reinterpret_cast<unsigned char*>(signature.data());
ECDSASigPointer asn1_sig(d2i_ECDSA_SIG(nullptr, &sig_data, signature.size()));
if (!asn1_sig)
return AllocatedBuffer();
AllocatedBuffer buf = AllocatedBuffer::AllocateManaged(env, 2 * n);
unsigned char* data = reinterpret_cast<unsigned char*>(buf.data());
const BIGNUM* r = ECDSA_SIG_get0_r(asn1_sig.get());
const BIGNUM* s = ECDSA_SIG_get0_s(asn1_sig.get());
CHECK_EQ(n, static_cast<unsigned int>(BN_bn2binpad(r, data, n)));
CHECK_EQ(n, static_cast<unsigned int>(BN_bn2binpad(s, data + n, n)));
return buf;
}
ByteSource ConvertSignatureToDER(
const ManagedEVPPKey& pkey,
const ArrayBufferOrViewContents<char>& signature) {
unsigned int n = GetBytesOfRS(pkey);
if (n == kNoDsaSignature)
return signature.ToByteSource();
const unsigned char* sig_data =
reinterpret_cast<const unsigned char*>(signature.data());
if (signature.size() != 2 * n)
return ByteSource();
ECDSASigPointer asn1_sig(ECDSA_SIG_new());
CHECK(asn1_sig);
BIGNUM* r = BN_new();
CHECK_NOT_NULL(r);
BIGNUM* s = BN_new();
CHECK_NOT_NULL(s);
CHECK_EQ(r, BN_bin2bn(sig_data, n, r));
CHECK_EQ(s, BN_bin2bn(sig_data + n, n, s));
CHECK_EQ(1, ECDSA_SIG_set0(asn1_sig.get(), r, s));
unsigned char* data = nullptr;
int len = i2d_ECDSA_SIG(asn1_sig.get(), &data);
if (len <= 0)
return ByteSource();
CHECK_NOT_NULL(data);
return ByteSource::Allocated(reinterpret_cast<char*>(data), len);
}
void CheckThrow(Environment* env, SignBase::Error error) {
HandleScope scope(env->isolate());
switch (error) {
case SignBase::Error::kSignUnknownDigest:
return THROW_ERR_CRYPTO_INVALID_DIGEST(env);
case SignBase::Error::kSignNotInitialised:
return THROW_ERR_CRYPTO_INVALID_STATE(env, "Not initialised");
case SignBase::Error::kSignMalformedSignature:
return THROW_ERR_CRYPTO_OPERATION_FAILED(env, "Malformed signature");
case SignBase::Error::kSignInit:
case SignBase::Error::kSignUpdate:
case SignBase::Error::kSignPrivateKey:
case SignBase::Error::kSignPublicKey:
{
unsigned long err = ERR_get_error(); // NOLINT(runtime/int)
if (err)
return ThrowCryptoError(env, err);
switch (error) {
case SignBase::Error::kSignInit:
return THROW_ERR_CRYPTO_OPERATION_FAILED(env,
"EVP_SignInit_ex failed");
case SignBase::Error::kSignUpdate:
return THROW_ERR_CRYPTO_OPERATION_FAILED(env,
"EVP_SignUpdate failed");
case SignBase::Error::kSignPrivateKey:
return THROW_ERR_CRYPTO_OPERATION_FAILED(env,
"PEM_read_bio_PrivateKey failed");
case SignBase::Error::kSignPublicKey:
return THROW_ERR_CRYPTO_OPERATION_FAILED(env,
"PEM_read_bio_PUBKEY failed");
default:
ABORT();
}
}
case SignBase::Error::kSignOk:
return;
}
}
} // namespace
SignBase::Error SignBase::Init(const char* sign_type) {
CHECK_NULL(mdctx_);
// Historically, "dss1" and "DSS1" were DSA aliases for SHA-1
// exposed through the public API.
if (strcmp(sign_type, "dss1") == 0 ||
strcmp(sign_type, "DSS1") == 0) {
sign_type = "SHA1";
}
const EVP_MD* md = EVP_get_digestbyname(sign_type);
if (md == nullptr)
return kSignUnknownDigest;
mdctx_.reset(EVP_MD_CTX_new());
if (!mdctx_ || !EVP_DigestInit_ex(mdctx_.get(), md, nullptr)) {
mdctx_.reset();
return kSignInit;
}
return kSignOk;
}
SignBase::Error SignBase::Update(const char* data, size_t len) {
if (mdctx_ == nullptr)
return kSignNotInitialised;
if (!EVP_DigestUpdate(mdctx_.get(), data, len))
return kSignUpdate;
return kSignOk;
}
SignBase::SignBase(Environment* env, Local<Object> wrap)
: BaseObject(env, wrap) {}
void SignBase::MemoryInfo(MemoryTracker* tracker) const {
tracker->TrackFieldWithSize("mdctx", mdctx_ ? kSizeOf_EVP_MD_CTX : 0);
}
Sign::Sign(Environment* env, Local<Object> wrap) : SignBase(env, wrap) {
MakeWeak();
}
void Sign::Initialize(Environment* env, Local<Object> target) {
Local<FunctionTemplate> t = env->NewFunctionTemplate(New);
t->InstanceTemplate()->SetInternalFieldCount(
SignBase::kInternalFieldCount);
t->Inherit(BaseObject::GetConstructorTemplate(env));
env->SetProtoMethod(t, "init", SignInit);
env->SetProtoMethod(t, "update", SignUpdate);
env->SetProtoMethod(t, "sign", SignFinal);
env->SetConstructorFunction(target, "Sign", t);
env->SetMethod(target, "signOneShot", Sign::SignSync);
SignJob::Initialize(env, target);
constexpr int kSignJobModeSign = SignConfiguration::kSign;
constexpr int kSignJobModeVerify = SignConfiguration::kVerify;
NODE_DEFINE_CONSTANT(target, kSignJobModeSign);
NODE_DEFINE_CONSTANT(target, kSignJobModeVerify);
NODE_DEFINE_CONSTANT(target, RSA_PKCS1_PSS_PADDING);
}
void Sign::New(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
new Sign(env, args.This());
}
void Sign::SignInit(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Sign* sign;
ASSIGN_OR_RETURN_UNWRAP(&sign, args.Holder());
const node::Utf8Value sign_type(args.GetIsolate(), args[0]);
crypto::CheckThrow(env, sign->Init(*sign_type));
}
void Sign::SignUpdate(const FunctionCallbackInfo<Value>& args) {
Decode<Sign>(args, [](Sign* sign, const FunctionCallbackInfo<Value>& args,
const char* data, size_t size) {
Environment* env = Environment::GetCurrent(args);
if (UNLIKELY(size > INT_MAX))
return THROW_ERR_OUT_OF_RANGE(env, "data is too long");
Error err = sign->Update(data, size);
crypto::CheckThrow(sign->env(), err);
});
}
Sign::SignResult Sign::SignFinal(
const ManagedEVPPKey& pkey,
int padding,
const Maybe<int>& salt_len,
DSASigEnc dsa_sig_enc) {
if (!mdctx_)
return SignResult(kSignNotInitialised);
EVPMDPointer mdctx = std::move(mdctx_);
if (!ValidateDSAParameters(pkey.get()))
return SignResult(kSignPrivateKey);
AllocatedBuffer buffer =
Node_SignFinal(env(), std::move(mdctx), pkey, padding, salt_len);
Error error = buffer.data() == nullptr ? kSignPrivateKey : kSignOk;
if (error == kSignOk && dsa_sig_enc == kSigEncP1363) {
buffer = ConvertSignatureToP1363(env(), pkey, std::move(buffer));
CHECK_NOT_NULL(buffer.data());
}
return SignResult(error, std::move(buffer));
}
void Sign::SignFinal(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Sign* sign;
ASSIGN_OR_RETURN_UNWRAP(&sign, args.Holder());
ClearErrorOnReturn clear_error_on_return;
unsigned int offset = 0;
ManagedEVPPKey key = ManagedEVPPKey::GetPrivateKeyFromJs(args, &offset, true);
if (!key)
return;
int padding = GetDefaultSignPadding(key);
if (!args[offset]->IsUndefined()) {
CHECK(args[offset]->IsInt32());
padding = args[offset].As<Int32>()->Value();
}
Maybe<int> salt_len = Nothing<int>();
if (!args[offset + 1]->IsUndefined()) {
CHECK(args[offset + 1]->IsInt32());
salt_len = Just<int>(args[offset + 1].As<Int32>()->Value());
}
CHECK(args[offset + 2]->IsInt32());
DSASigEnc dsa_sig_enc =
static_cast<DSASigEnc>(args[offset + 2].As<Int32>()->Value());
SignResult ret = sign->SignFinal(
key,
padding,
salt_len,
dsa_sig_enc);
if (ret.error != kSignOk)
return crypto::CheckThrow(env, ret.error);
args.GetReturnValue().Set(ret.signature.ToBuffer().FromMaybe(Local<Value>()));
}
Verify::Verify(Environment* env, Local<Object> wrap)
: SignBase(env, wrap) {
MakeWeak();
}
void Verify::Initialize(Environment* env, Local<Object> target) {
Local<FunctionTemplate> t = env->NewFunctionTemplate(New);
t->InstanceTemplate()->SetInternalFieldCount(
SignBase::kInternalFieldCount);
t->Inherit(BaseObject::GetConstructorTemplate(env));
env->SetProtoMethod(t, "init", VerifyInit);
env->SetProtoMethod(t, "update", VerifyUpdate);
env->SetProtoMethod(t, "verify", VerifyFinal);
env->SetConstructorFunction(target, "Verify", t);
env->SetMethod(target, "verifyOneShot", Verify::VerifySync);
}
void Verify::New(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
new Verify(env, args.This());
}
void Verify::VerifyInit(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Verify* verify;
ASSIGN_OR_RETURN_UNWRAP(&verify, args.Holder());
const node::Utf8Value verify_type(args.GetIsolate(), args[0]);
crypto::CheckThrow(env, verify->Init(*verify_type));
}
void Verify::VerifyUpdate(const FunctionCallbackInfo<Value>& args) {
Decode<Verify>(args, [](Verify* verify,
const FunctionCallbackInfo<Value>& args,
const char* data, size_t size) {
Environment* env = Environment::GetCurrent(args);
if (UNLIKELY(size > INT_MAX))
return THROW_ERR_OUT_OF_RANGE(env, "data is too long");
Error err = verify->Update(data, size);
crypto::CheckThrow(verify->env(), err);
});
}
SignBase::Error Verify::VerifyFinal(const ManagedEVPPKey& pkey,
const ByteSource& sig,
int padding,
const Maybe<int>& saltlen,
bool* verify_result) {
if (!mdctx_)
return kSignNotInitialised;
unsigned char m[EVP_MAX_MD_SIZE];
unsigned int m_len;
*verify_result = false;
EVPMDPointer mdctx = std::move(mdctx_);
if (!EVP_DigestFinal_ex(mdctx.get(), m, &m_len))
return kSignPublicKey;
EVPKeyCtxPointer pkctx(EVP_PKEY_CTX_new(pkey.get(), nullptr));
if (pkctx &&
EVP_PKEY_verify_init(pkctx.get()) > 0 &&
ApplyRSAOptions(pkey, pkctx.get(), padding, saltlen) &&
EVP_PKEY_CTX_set_signature_md(pkctx.get(),
EVP_MD_CTX_md(mdctx.get())) > 0) {
const unsigned char* s = reinterpret_cast<const unsigned char*>(sig.get());
const int r = EVP_PKEY_verify(pkctx.get(), s, sig.size(), m, m_len);
*verify_result = r == 1;
}
return kSignOk;
}
void Verify::VerifyFinal(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
ClearErrorOnReturn clear_error_on_return;
Verify* verify;
ASSIGN_OR_RETURN_UNWRAP(&verify, args.Holder());
unsigned int offset = 0;
ManagedEVPPKey pkey =
ManagedEVPPKey::GetPublicOrPrivateKeyFromJs(args, &offset);
if (!pkey)
return;
ArrayBufferOrViewContents<char> hbuf(args[offset]);
if (UNLIKELY(!hbuf.CheckSizeInt32()))
return THROW_ERR_OUT_OF_RANGE(env, "buffer is too big");
int padding = GetDefaultSignPadding(pkey);
if (!args[offset + 1]->IsUndefined()) {
CHECK(args[offset + 1]->IsInt32());
padding = args[offset + 1].As<Int32>()->Value();
}
Maybe<int> salt_len = Nothing<int>();
if (!args[offset + 2]->IsUndefined()) {
CHECK(args[offset + 2]->IsInt32());
salt_len = Just<int>(args[offset + 2].As<Int32>()->Value());
}
CHECK(args[offset + 3]->IsInt32());
DSASigEnc dsa_sig_enc =
static_cast<DSASigEnc>(args[offset + 3].As<Int32>()->Value());
ByteSource signature = hbuf.ToByteSource();
if (dsa_sig_enc == kSigEncP1363) {
signature = ConvertSignatureToDER(pkey, hbuf);
if (signature.get() == nullptr)
return crypto::CheckThrow(env, Error::kSignMalformedSignature);
}
bool verify_result;
Error err = verify->VerifyFinal(pkey, signature, padding,
salt_len, &verify_result);
if (err != kSignOk)
return crypto::CheckThrow(env, err);
args.GetReturnValue().Set(verify_result);
}
void Sign::SignSync(const FunctionCallbackInfo<Value>& args) {
ClearErrorOnReturn clear_error_on_return;
Environment* env = Environment::GetCurrent(args);
unsigned int offset = 0;
ManagedEVPPKey key = ManagedEVPPKey::GetPrivateKeyFromJs(args, &offset, true);
if (!key)
return;
if (!ValidateDSAParameters(key.get()))
return crypto::CheckThrow(env, SignBase::Error::kSignPrivateKey);
ArrayBufferOrViewContents<char> data(args[offset]);
if (UNLIKELY(!data.CheckSizeInt32()))
return THROW_ERR_OUT_OF_RANGE(env, "data is too big");
const EVP_MD* md;
if (args[offset + 1]->IsNullOrUndefined()) {
md = nullptr;
} else {
const node::Utf8Value sign_type(args.GetIsolate(), args[offset + 1]);
md = EVP_get_digestbyname(*sign_type);
if (md == nullptr)
return crypto::CheckThrow(env, SignBase::Error::kSignUnknownDigest);
}
int rsa_padding = GetDefaultSignPadding(key);
if (!args[offset + 2]->IsUndefined()) {
CHECK(args[offset + 2]->IsInt32());
rsa_padding = args[offset + 2].As<Int32>()->Value();
}
Maybe<int> rsa_salt_len = Nothing<int>();
if (!args[offset + 3]->IsUndefined()) {
CHECK(args[offset + 3]->IsInt32());
rsa_salt_len = Just<int>(args[offset + 3].As<Int32>()->Value());
}
CHECK(args[offset + 4]->IsInt32());
DSASigEnc dsa_sig_enc =
static_cast<DSASigEnc>(args[offset + 4].As<Int32>()->Value());
EVP_PKEY_CTX* pkctx = nullptr;
EVPMDPointer mdctx(EVP_MD_CTX_new());
if (!mdctx ||
!EVP_DigestSignInit(mdctx.get(), &pkctx, md, nullptr, key.get())) {
return crypto::CheckThrow(env, SignBase::Error::kSignInit);
}
if (!ApplyRSAOptions(key, pkctx, rsa_padding, rsa_salt_len))
return crypto::CheckThrow(env, SignBase::Error::kSignPrivateKey);
const unsigned char* input =
reinterpret_cast<const unsigned char*>(data.data());
size_t sig_len;
if (!EVP_DigestSign(mdctx.get(), nullptr, &sig_len, input, data.size()))
return crypto::CheckThrow(env, SignBase::Error::kSignPrivateKey);
AllocatedBuffer signature = AllocatedBuffer::AllocateManaged(env, sig_len);
if (!EVP_DigestSign(mdctx.get(),
reinterpret_cast<unsigned char*>(signature.data()),
&sig_len,
input,
data.size())) {
return crypto::CheckThrow(env, SignBase::Error::kSignPrivateKey);
}
signature.Resize(sig_len);
if (dsa_sig_enc == kSigEncP1363) {
signature = ConvertSignatureToP1363(env, key, std::move(signature));
}
args.GetReturnValue().Set(signature.ToBuffer().FromMaybe(Local<Value>()));
}
void Verify::VerifySync(const FunctionCallbackInfo<Value>& args) {
ClearErrorOnReturn clear_error_on_return;
Environment* env = Environment::GetCurrent(args);
unsigned int offset = 0;
ManagedEVPPKey key =
ManagedEVPPKey::GetPublicOrPrivateKeyFromJs(args, &offset);
if (!key)
return;
ArrayBufferOrViewContents<char> sig(args[offset]);
ArrayBufferOrViewContents<char> data(args[offset + 1]);
if (UNLIKELY(!sig.CheckSizeInt32()))
return THROW_ERR_OUT_OF_RANGE(env, "sig is too big");
if (UNLIKELY(!data.CheckSizeInt32()))
return THROW_ERR_OUT_OF_RANGE(env, "data is too big");
const EVP_MD* md;
if (args[offset + 2]->IsNullOrUndefined()) {
md = nullptr;
} else {
const node::Utf8Value sign_type(args.GetIsolate(), args[offset + 2]);
md = EVP_get_digestbyname(*sign_type);
if (md == nullptr)
return crypto::CheckThrow(env, SignBase::Error::kSignUnknownDigest);
}
int rsa_padding = GetDefaultSignPadding(key);
if (!args[offset + 3]->IsUndefined()) {
CHECK(args[offset + 3]->IsInt32());
rsa_padding = args[offset + 3].As<Int32>()->Value();
}
Maybe<int> rsa_salt_len = Nothing<int>();
if (!args[offset + 4]->IsUndefined()) {
CHECK(args[offset + 4]->IsInt32());
rsa_salt_len = Just<int>(args[offset + 4].As<Int32>()->Value());
}
CHECK(args[offset + 5]->IsInt32());
DSASigEnc dsa_sig_enc =
static_cast<DSASigEnc>(args[offset + 5].As<Int32>()->Value());
EVP_PKEY_CTX* pkctx = nullptr;
EVPMDPointer mdctx(EVP_MD_CTX_new());
if (!mdctx ||
!EVP_DigestVerifyInit(mdctx.get(), &pkctx, md, nullptr, key.get())) {
return crypto::CheckThrow(env, SignBase::Error::kSignInit);
}
if (!ApplyRSAOptions(key, pkctx, rsa_padding, rsa_salt_len))
return crypto::CheckThrow(env, SignBase::Error::kSignPublicKey);
ByteSource sig_bytes = ByteSource::Foreign(sig.data(), sig.size());
if (dsa_sig_enc == kSigEncP1363) {
sig_bytes = ConvertSignatureToDER(key, sig);
if (!sig_bytes)
return crypto::CheckThrow(env, SignBase::Error::kSignMalformedSignature);
}
bool verify_result;
const int r = EVP_DigestVerify(
mdctx.get(),
sig_bytes.data<unsigned char>(),
sig_bytes.size(),
reinterpret_cast<const unsigned char*>(data.data()),
data.size());
switch (r) {
case 1:
verify_result = true;
break;
case 0:
verify_result = false;
break;
default:
return crypto::CheckThrow(env, SignBase::Error::kSignPublicKey);
}
args.GetReturnValue().Set(verify_result);
}
SignConfiguration::SignConfiguration(SignConfiguration&& other) noexcept
: job_mode(other.job_mode),
mode(other.mode),
key(std::move(other.key)),
data(std::move(other.data)),
signature(std::move(other.signature)),
digest(other.digest),
flags(other.flags),
padding(other.padding),
salt_length(other.salt_length) {}
SignConfiguration& SignConfiguration::operator=(
SignConfiguration&& other) noexcept {
if (&other == this) return *this;
this->~SignConfiguration();
return *new (this) SignConfiguration(std::move(other));
}
void SignConfiguration::MemoryInfo(MemoryTracker* tracker) const {
tracker->TrackField("key", key.get());
if (job_mode == kCryptoJobAsync) {
tracker->TrackFieldWithSize("data", data.size());
tracker->TrackFieldWithSize("signature", signature.size());
}
}
Maybe<bool> SignTraits::AdditionalConfig(
CryptoJobMode mode,
const FunctionCallbackInfo<Value>& args,
unsigned int offset,
SignConfiguration* params) {
Environment* env = Environment::GetCurrent(args);
params->job_mode = mode;
CHECK(args[offset]->IsUint32()); // Sign Mode
CHECK(args[offset + 1]->IsObject()); // Key
params->mode =
static_cast<SignConfiguration::Mode>(args[offset].As<Uint32>()->Value());
KeyObjectHandle* key;
ASSIGN_OR_RETURN_UNWRAP(&key, args[offset + 1], Nothing<bool>());
params->key = key->Data();
ArrayBufferOrViewContents<char> data(args[offset + 2]);
if (UNLIKELY(!data.CheckSizeInt32())) {
THROW_ERR_OUT_OF_RANGE(env, "data is too big");
return Nothing<bool>();
}
params->data = mode == kCryptoJobAsync
? data.ToCopy()
: data.ToByteSource();
if (args[offset + 3]->IsString()) {
Utf8Value digest(env->isolate(), args[offset + 3]);
params->digest = EVP_get_digestbyname(*digest);
if (params->digest == nullptr) {
THROW_ERR_CRYPTO_INVALID_DIGEST(env);
return Nothing<bool>();
}
}
if (args[offset + 4]->IsUint32()) { // Salt length
params->flags |= SignConfiguration::kHasSaltLength;
params->salt_length = args[offset + 4].As<Uint32>()->Value();
}
if (args[offset + 5]->IsUint32()) { // Padding
params->flags |= SignConfiguration::kHasPadding;
params->padding = args[offset + 5].As<Uint32>()->Value();
}
if (params->mode == SignConfiguration::kVerify) {
ArrayBufferOrViewContents<char> signature(args[offset + 6]);
if (UNLIKELY(!signature.CheckSizeInt32())) {
THROW_ERR_OUT_OF_RANGE(env, "signature is too big");
return Nothing<bool>();
}
// If this is an EC key (assuming ECDSA) we need to convert the
// the signature from WebCrypto format into DER format...
if (EVP_PKEY_id(params->key->GetAsymmetricKey().get()) == EVP_PKEY_EC) {
params->signature =
ConvertFromWebCryptoSignature(
params->key->GetAsymmetricKey(),
signature.ToByteSource());
} else {
params->signature = mode == kCryptoJobAsync
? signature.ToCopy()
: signature.ToByteSource();
}
}
return Just(true);
}
bool SignTraits::DeriveBits(
Environment* env,
const SignConfiguration& params,
ByteSource* out) {
EVPMDPointer context(EVP_MD_CTX_new());
EVP_PKEY_CTX* ctx = nullptr;
switch (params.mode) {
case SignConfiguration::kSign:
CHECK_EQ(params.key->GetKeyType(), kKeyTypePrivate);
if (!EVP_DigestSignInit(
context.get(),
&ctx,
params.digest,
nullptr,
params.key->GetAsymmetricKey().get())) {
return false;
}
break;
case SignConfiguration::kVerify:
CHECK_EQ(params.key->GetKeyType(), kKeyTypePublic);
if (!EVP_DigestVerifyInit(
context.get(),
&ctx,
params.digest,
nullptr,
params.key->GetAsymmetricKey().get())) {
return false;
}
break;
}
int padding = params.flags & SignConfiguration::kHasPadding
? params.padding
: GetDefaultSignPadding(params.key->GetAsymmetricKey());
Maybe<int> salt_length = params.flags & SignConfiguration::kHasSaltLength
? Just<int>(params.salt_length) : Nothing<int>();
if (!ApplyRSAOptions(
params.key->GetAsymmetricKey(),
ctx,
padding,
salt_length)) {
return false;
}
switch (params.mode) {
case SignConfiguration::kSign: {
size_t len;
if (!EVP_DigestSignUpdate(
context.get(),
params.data.data<unsigned char>(),
params.data.size()) ||
!EVP_DigestSignFinal(context.get(), nullptr, &len)) {
return false;
}
char* data = MallocOpenSSL<char>(len);
ByteSource buf = ByteSource::Allocated(data, len);
unsigned char* ptr = reinterpret_cast<unsigned char*>(data);
if (!EVP_DigestSignFinal(context.get(), ptr, &len))
return false;
// If this is an EC key (assuming ECDSA) we have to
// convert the signature in to the proper format.
if (EVP_PKEY_id(params.key->GetAsymmetricKey().get()) == EVP_PKEY_EC) {
*out = ConvertToWebCryptoSignature(params.key->GetAsymmetricKey(), buf);
} else {
buf.Resize(len);
*out = std::move(buf);
}
break;
}
case SignConfiguration::kVerify: {
char* data = MallocOpenSSL<char>(1);
data[0] = 0;
*out = ByteSource::Allocated(data, 1);
if (!EVP_DigestVerifyUpdate(
context.get(),
params.data.data<unsigned char>(),
params.data.size())) {
return false;
}
if (EVP_DigestVerifyFinal(
context.get(),
params.signature.data<unsigned char>(),
params.signature.size()) == 1) {
data[0] = 1;
}
}
}
return true;
}
Maybe<bool> SignTraits::EncodeOutput(
Environment* env,
const SignConfiguration& params,
ByteSource* out,
Local<Value>* result) {
switch (params.mode) {
case SignConfiguration::kSign:
*result = out->ToArrayBuffer(env);
break;
case SignConfiguration::kVerify:
*result = out->get()[0] == 1
? v8::True(env->isolate())
: v8::False(env->isolate());
break;
default:
UNREACHABLE();
}
return Just(!result->IsEmpty());
}
} // namespace crypto
} // namespace node
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