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crypto: make SignBase compatible with OpenSSL 1.1.0
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1.1.0 requires EVP_MD_CTX be heap-allocated. In doing so, move the Init
and Update hooks to shared code because they are the same between Verify
and Sign.

PR-URL: #16130
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Rod Vagg <rod@vagg.org>
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@davidben @evanlucas
davidben authored and evanlucas committed Nov 13, 2017
1 parent abe3dc4 commit fa1fc16
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Showing 2 changed files with 51 additions and 76 deletions.
109 changes: 45 additions & 64 deletions src/node_crypto.cc
View file
Expand Up @@ -4052,6 +4052,38 @@ void Hash::HashDigest(const FunctionCallbackInfo<Value>& args) {
}


SignBase::~SignBase() {
EVP_MD_CTX_free(mdctx_);
}


SignBase::Error SignBase::Init(const char* sign_type) {
CHECK_EQ(mdctx_, nullptr);
const EVP_MD* md = EVP_get_digestbyname(sign_type);
if (md == nullptr)
return kSignUnknownDigest;

mdctx_ = EVP_MD_CTX_new();
if (mdctx_ == nullptr ||
!EVP_DigestInit_ex(mdctx_, md, nullptr)) {
EVP_MD_CTX_free(mdctx_);
mdctx_ = nullptr;
return kSignInit;
}

return kSignOk;
}


SignBase::Error SignBase::Update(const char* data, int len) {
if (mdctx_ == nullptr)
return kSignNotInitialised;
if (!EVP_DigestUpdate(mdctx_, data, len))
return kSignUpdate;
return kSignOk;
}


void SignBase::CheckThrow(SignBase::Error error) {
HandleScope scope(env()->isolate());

Expand Down Expand Up @@ -4125,36 +4157,12 @@ void Sign::New(const FunctionCallbackInfo<Value>& args) {
}


SignBase::Error Sign::SignInit(const char* sign_type) {
CHECK_EQ(initialised_, false);
const EVP_MD* md = EVP_get_digestbyname(sign_type);
if (md == nullptr)
return kSignUnknownDigest;

EVP_MD_CTX_init(&mdctx_);
if (!EVP_DigestInit_ex(&mdctx_, md, nullptr))
return kSignInit;
initialised_ = true;

return kSignOk;
}


void Sign::SignInit(const FunctionCallbackInfo<Value>& args) {
Sign* sign;
ASSIGN_OR_RETURN_UNWRAP(&sign, args.Holder());

const node::Utf8Value sign_type(args.GetIsolate(), args[0]);
sign->CheckThrow(sign->SignInit(*sign_type));
}


SignBase::Error Sign::SignUpdate(const char* data, int len) {
if (!initialised_)
return kSignNotInitialised;
if (!EVP_DigestUpdate(&mdctx_, data, len))
return kSignUpdate;
return kSignOk;
sign->CheckThrow(sign->Init(*sign_type));
}


Expand All @@ -4165,7 +4173,7 @@ void Sign::SignUpdate(const FunctionCallbackInfo<Value>& args) {
Error err;
char* buf = Buffer::Data(args[0]);
size_t buflen = Buffer::Length(args[0]);
err = sign->SignUpdate(buf, buflen);
err = sign->Update(buf, buflen);

sign->CheckThrow(err);
}
Expand Down Expand Up @@ -4208,7 +4216,7 @@ SignBase::Error Sign::SignFinal(const char* key_pem,
unsigned int* sig_len,
int padding,
int salt_len) {
if (!initialised_)
if (!mdctx_)
return kSignNotInitialised;

BIO* bp = nullptr;
Expand Down Expand Up @@ -4253,18 +4261,17 @@ SignBase::Error Sign::SignFinal(const char* key_pem,
}
#endif // NODE_FIPS_MODE

if (Node_SignFinal(&mdctx_, sig, sig_len, pkey, padding, salt_len))
if (Node_SignFinal(mdctx_, sig, sig_len, pkey, padding, salt_len))
fatal = false;

initialised_ = false;

exit:
if (pkey != nullptr)
EVP_PKEY_free(pkey);
if (bp != nullptr)
BIO_free_all(bp);

EVP_MD_CTX_cleanup(&mdctx_);
EVP_MD_CTX_free(mdctx_);
mdctx_ = nullptr;

if (fatal)
return kSignPrivateKey;
Expand Down Expand Up @@ -4338,38 +4345,12 @@ void Verify::New(const FunctionCallbackInfo<Value>& args) {
}


SignBase::Error Verify::VerifyInit(const char* verify_type) {
CHECK_EQ(initialised_, false);
const EVP_MD* md = EVP_get_digestbyname(verify_type);
if (md == nullptr)
return kSignUnknownDigest;

EVP_MD_CTX_init(&mdctx_);
if (!EVP_DigestInit_ex(&mdctx_, md, nullptr))
return kSignInit;
initialised_ = true;

return kSignOk;
}


void Verify::VerifyInit(const FunctionCallbackInfo<Value>& args) {
Verify* verify;
ASSIGN_OR_RETURN_UNWRAP(&verify, args.Holder());

const node::Utf8Value verify_type(args.GetIsolate(), args[0]);
verify->CheckThrow(verify->VerifyInit(*verify_type));
}


SignBase::Error Verify::VerifyUpdate(const char* data, int len) {
if (!initialised_)
return kSignNotInitialised;

if (!EVP_DigestUpdate(&mdctx_, data, len))
return kSignUpdate;

return kSignOk;
verify->CheckThrow(verify->Init(*verify_type));
}


Expand All @@ -4380,7 +4361,7 @@ void Verify::VerifyUpdate(const FunctionCallbackInfo<Value>& args) {
Error err;
char* buf = Buffer::Data(args[0]);
size_t buflen = Buffer::Length(args[0]);
err = verify->VerifyUpdate(buf, buflen);
err = verify->Update(buf, buflen);

verify->CheckThrow(err);
}
Expand All @@ -4393,7 +4374,7 @@ SignBase::Error Verify::VerifyFinal(const char* key_pem,
int padding,
int saltlen,
bool* verify_result) {
if (!initialised_)
if (!mdctx_)
return kSignNotInitialised;

EVP_PKEY* pkey = nullptr;
Expand Down Expand Up @@ -4438,7 +4419,7 @@ SignBase::Error Verify::VerifyFinal(const char* key_pem,
goto exit;
}

if (!EVP_DigestFinal_ex(&mdctx_, m, &m_len)) {
if (!EVP_DigestFinal_ex(mdctx_, m, &m_len)) {
goto exit;
}

Expand All @@ -4451,7 +4432,7 @@ SignBase::Error Verify::VerifyFinal(const char* key_pem,
goto err;
if (!ApplyRSAOptions(pkey, pkctx, padding, saltlen))
goto err;
if (EVP_PKEY_CTX_set_signature_md(pkctx, mdctx_.digest) <= 0)
if (EVP_PKEY_CTX_set_signature_md(pkctx, EVP_MD_CTX_md(mdctx_)) <= 0)
goto err;
r = EVP_PKEY_verify(pkctx,
reinterpret_cast<const unsigned char*>(sig),
Expand All @@ -4470,8 +4451,8 @@ SignBase::Error Verify::VerifyFinal(const char* key_pem,
if (x509 != nullptr)
X509_free(x509);

EVP_MD_CTX_cleanup(&mdctx_);
initialised_ = false;
EVP_MD_CTX_free(mdctx_);
mdctx_ = nullptr;

if (fatal)
return kSignPublicKey;
Expand Down
18 changes: 6 additions & 12 deletions src/node_crypto.h
View file
Expand Up @@ -562,28 +562,24 @@ class SignBase : public BaseObject {

SignBase(Environment* env, v8::Local<v8::Object> wrap)
: BaseObject(env, wrap),
initialised_(false) {
mdctx_(nullptr) {
}

~SignBase() override {
if (!initialised_)
return;
EVP_MD_CTX_cleanup(&mdctx_);
}
~SignBase() override;

Error Init(const char* sign_type);
Error Update(const char* data, int len);

protected:
void CheckThrow(Error error);

EVP_MD_CTX mdctx_; /* coverity[member_decl] */
bool initialised_;
EVP_MD_CTX* mdctx_;
};

class Sign : public SignBase {
public:
static void Initialize(Environment* env, v8::Local<v8::Object> target);

Error SignInit(const char* sign_type);
Error SignUpdate(const char* data, int len);
Error SignFinal(const char* key_pem,
int key_pem_len,
const char* passphrase,
Expand All @@ -607,8 +603,6 @@ class Verify : public SignBase {
public:
static void Initialize(Environment* env, v8::Local<v8::Object> target);

Error VerifyInit(const char* verify_type);
Error VerifyUpdate(const char* data, int len);
Error VerifyFinal(const char* key_pem,
int key_pem_len,
const char* sig,
Expand Down

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