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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "node.h"
#include "node_buffer.h"
#include "node_constants.h"
#include "node_crypto.h"
#include "node_crypto_bio.h"
#include "node_crypto_groups.h"
#include "node_crypto_clienthello-inl.h"
#include "node_mutex.h"
#include "tls_wrap.h" // TLSWrap
#include "async_wrap-inl.h"
#include "env-inl.h"
#include "string_bytes.h"
#include "util-inl.h"
#include "v8.h"
#include <errno.h>
#include <limits.h> // INT_MAX
#include <math.h>
#include <string.h>
#include <algorithm>
#include <memory>
#include <vector>
#define THROW_AND_RETURN_IF_NOT_BUFFER(val, prefix) \
do { \
if (!Buffer::HasInstance(val)) { \
return env->ThrowTypeError(prefix " must be a buffer"); \
} \
} while (0)
#define THROW_AND_RETURN_IF_NOT_STRING(val, prefix) \
do { \
if (!val->IsString()) { \
return env->ThrowTypeError(prefix " must be a string"); \
} \
} while (0)
static const char PUBLIC_KEY_PFX[] = "-----BEGIN PUBLIC KEY-----";
static const int PUBLIC_KEY_PFX_LEN = sizeof(PUBLIC_KEY_PFX) - 1;
static const char PUBRSA_KEY_PFX[] = "-----BEGIN RSA PUBLIC KEY-----";
static const int PUBRSA_KEY_PFX_LEN = sizeof(PUBRSA_KEY_PFX) - 1;
static const char CERTIFICATE_PFX[] = "-----BEGIN CERTIFICATE-----";
static const int CERTIFICATE_PFX_LEN = sizeof(CERTIFICATE_PFX) - 1;
static const int X509_NAME_FLAGS = ASN1_STRFLGS_ESC_CTRL
| ASN1_STRFLGS_UTF8_CONVERT
| XN_FLAG_SEP_MULTILINE
| XN_FLAG_FN_SN;
namespace node {
namespace crypto {
using v8::Array;
using v8::Boolean;
using v8::Context;
using v8::DEFAULT;
using v8::DontDelete;
using v8::EscapableHandleScope;
using v8::Exception;
using v8::External;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::Maybe;
using v8::MaybeLocal;
using v8::Null;
using v8::Object;
using v8::ObjectTemplate;
using v8::PropertyAttribute;
using v8::ReadOnly;
using v8::Signature;
using v8::String;
using v8::Value;
struct StackOfX509Deleter {
void operator()(STACK_OF(X509)* p) const { sk_X509_pop_free(p, X509_free); }
};
using StackOfX509 = std::unique_ptr<STACK_OF(X509), StackOfX509Deleter>;
#if OPENSSL_VERSION_NUMBER < 0x10100000L
static void RSA_get0_key(const RSA* r, const BIGNUM** n, const BIGNUM** e,
const BIGNUM** d) {
if (n != nullptr) {
*n = r->n;
}
if (e != nullptr) {
*e = r->e;
}
if (d != nullptr) {
*d = r->d;
}
}
static void DH_get0_pqg(const DH* dh, const BIGNUM** p, const BIGNUM** q,
const BIGNUM** g) {
if (p != nullptr) {
*p = dh->p;
}
if (q != nullptr) {
*q = dh->q;
}
if (g != nullptr) {
*g = dh->g;
}
}
static int DH_set0_pqg(DH* dh, BIGNUM* p, BIGNUM* q, BIGNUM* g) {
if ((dh->p == nullptr && p == nullptr) ||
(dh->g == nullptr && g == nullptr)) {
return 0;
}
if (p != nullptr) {
BN_free(dh->p);
dh->p = p;
}
if (q != nullptr) {
BN_free(dh->q);
dh->q = q;
}
if (g != nullptr) {
BN_free(dh->g);
dh->g = g;
}
return 1;
}
static void DH_get0_key(const DH* dh, const BIGNUM** pub_key,
const BIGNUM** priv_key) {
if (pub_key != nullptr) {
*pub_key = dh->pub_key;
}
if (priv_key != nullptr) {
*priv_key = dh->priv_key;
}
}
static int DH_set0_key(DH* dh, BIGNUM* pub_key, BIGNUM* priv_key) {
if (pub_key != nullptr) {
BN_free(dh->pub_key);
dh->pub_key = pub_key;
}
if (priv_key != nullptr) {
BN_free(dh->priv_key);
dh->priv_key = priv_key;
}
return 1;
}
static const SSL_METHOD* TLS_method() { return SSLv23_method(); }
static void SSL_SESSION_get0_ticket(const SSL_SESSION* s,
const unsigned char** tick, size_t* len) {
*len = s->tlsext_ticklen;
if (tick != nullptr) {
*tick = s->tlsext_tick;
}
}
#define SSL_get_tlsext_status_type(ssl) (ssl->tlsext_status_type)
static int X509_STORE_up_ref(X509_STORE* store) {
CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
return 1;
}
static int X509_up_ref(X509* cert) {
CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
return 1;
}
#define EVP_MD_CTX_new EVP_MD_CTX_create
#define EVP_MD_CTX_free EVP_MD_CTX_destroy
HMAC_CTX* HMAC_CTX_new() {
HMAC_CTX* ctx = Malloc<HMAC_CTX>(1);
HMAC_CTX_init(ctx);
return ctx;
}
void HMAC_CTX_free(HMAC_CTX* ctx) {
if (ctx == nullptr) {
return;
}
HMAC_CTX_cleanup(ctx);
free(ctx);
}
#endif // OPENSSL_VERSION_NUMBER < 0x10100000L
static const char* const root_certs[] = {
#include "node_root_certs.h" // NOLINT(build/include_order)
};
static const char system_cert_path[] = NODE_OPENSSL_SYSTEM_CERT_PATH;
static std::string extra_root_certs_file; // NOLINT(runtime/string)
static X509_STORE* root_cert_store;
// Just to generate static methods
template void SSLWrap<TLSWrap>::AddMethods(Environment* env,
Local<FunctionTemplate> t);
template void SSLWrap<TLSWrap>::ConfigureSecureContext(SecureContext* sc);
template void SSLWrap<TLSWrap>::SetSNIContext(SecureContext* sc);
template int SSLWrap<TLSWrap>::SetCACerts(SecureContext* sc);
#if OPENSSL_VERSION_NUMBER < 0x10100000L
template SSL_SESSION* SSLWrap<TLSWrap>::GetSessionCallback(
SSL* s,
unsigned char* key,
int len,
int* copy);
#else
template SSL_SESSION* SSLWrap<TLSWrap>::GetSessionCallback(
SSL* s,
const unsigned char* key,
int len,
int* copy);
#endif
template int SSLWrap<TLSWrap>::NewSessionCallback(SSL* s,
SSL_SESSION* sess);
template void SSLWrap<TLSWrap>::OnClientHello(
void* arg,
const ClientHelloParser::ClientHello& hello);
#ifdef NODE__HAVE_TLSEXT_STATUS_CB
template int SSLWrap<TLSWrap>::TLSExtStatusCallback(SSL* s, void* arg);
#endif
template void SSLWrap<TLSWrap>::DestroySSL();
template int SSLWrap<TLSWrap>::SSLCertCallback(SSL* s, void* arg);
template void SSLWrap<TLSWrap>::WaitForCertCb(CertCb cb, void* arg);
#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
template int SSLWrap<TLSWrap>::SelectALPNCallback(
SSL* s,
const unsigned char** out,
unsigned char* outlen,
const unsigned char* in,
unsigned int inlen,
void* arg);
#endif // TLSEXT_TYPE_application_layer_protocol_negotiation
#if OPENSSL_VERSION_NUMBER < 0x10100000L
static Mutex* mutexes;
static void crypto_threadid_cb(CRYPTO_THREADID* tid) {
static_assert(sizeof(uv_thread_t) <= sizeof(void*),
"uv_thread_t does not fit in a pointer");
CRYPTO_THREADID_set_pointer(tid, reinterpret_cast<void*>(uv_thread_self()));
}
static void crypto_lock_init(void) {
mutexes = new Mutex[CRYPTO_num_locks()];
}
static void crypto_lock_cb(int mode, int n, const char* file, int line) {
CHECK(!(mode & CRYPTO_LOCK) ^ !(mode & CRYPTO_UNLOCK));
CHECK(!(mode & CRYPTO_READ) ^ !(mode & CRYPTO_WRITE));
auto mutex = &mutexes[n];
if (mode & CRYPTO_LOCK)
mutex->Lock();
else
mutex->Unlock();
}
#endif
static int PasswordCallback(char *buf, int size, int rwflag, void *u) {
if (u) {
size_t buflen = static_cast<size_t>(size);
size_t len = strlen(static_cast<const char*>(u));
len = len > buflen ? buflen : len;
memcpy(buf, u, len);
return len;
}
return 0;
}
// Loads OpenSSL engine by engine id and returns it. The loaded engine
// gets a reference so remember the corresponding call to ENGINE_free.
// In case of error the appropriate js exception is scheduled
// and nullptr is returned.
#ifndef OPENSSL_NO_ENGINE
static ENGINE* LoadEngineById(const char* engine_id, char (*errmsg)[1024]) {
MarkPopErrorOnReturn mark_pop_error_on_return;
ENGINE* engine = ENGINE_by_id(engine_id);
if (engine == nullptr) {
// Engine not found, try loading dynamically.
engine = ENGINE_by_id("dynamic");
if (engine != nullptr) {
if (!ENGINE_ctrl_cmd_string(engine, "SO_PATH", engine_id, 0) ||
!ENGINE_ctrl_cmd_string(engine, "LOAD", nullptr, 0)) {
ENGINE_free(engine);
engine = nullptr;
}
}
}
if (engine == nullptr) {
int err = ERR_get_error();
if (err != 0) {
ERR_error_string_n(err, *errmsg, sizeof(*errmsg));
} else {
snprintf(*errmsg, sizeof(*errmsg),
"Engine \"%s\" was not found", engine_id);
}
}
return engine;
}
#endif // !OPENSSL_NO_ENGINE
// This callback is used to avoid the default passphrase callback in OpenSSL
// which will typically prompt for the passphrase. The prompting is designed
// for the OpenSSL CLI, but works poorly for Node.js because it involves
// synchronous interaction with the controlling terminal, something we never
// want, and use this function to avoid it.
static int NoPasswordCallback(char *buf, int size, int rwflag, void *u) {
return 0;
}
void ThrowCryptoError(Environment* env,
unsigned long err, // NOLINT(runtime/int)
const char* default_message = nullptr) {
HandleScope scope(env->isolate());
Local<String> message;
if (err != 0 || default_message == nullptr) {
char errmsg[128] = { 0 };
ERR_error_string_n(err, errmsg, sizeof(errmsg));
message = String::NewFromUtf8(env->isolate(), errmsg,
v8::NewStringType::kNormal)
.ToLocalChecked();
} else {
message = String::NewFromUtf8(env->isolate(), default_message,
v8::NewStringType::kNormal)
.ToLocalChecked();
}
Local<Value> exception_v = Exception::Error(message);
CHECK(!exception_v.IsEmpty());
Local<Object> exception = exception_v.As<Object>();
std::vector<Local<String>> errors;
for (;;) {
unsigned long err = ERR_get_error(); // NOLINT(runtime/int)
if (err == 0) {
break;
}
char tmp_str[256];
ERR_error_string_n(err, tmp_str, sizeof(tmp_str));
errors.push_back(String::NewFromUtf8(env->isolate(), tmp_str,
v8::NewStringType::kNormal)
.ToLocalChecked());
}
// ERR_get_error returns errors in order of most specific to least
// specific. We wish to have the reverse ordering:
// opensslErrorStack: [
// 'error:0906700D:PEM routines:PEM_ASN1_read_bio:ASN1 lib',
// 'error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1 err'
// ]
if (!errors.empty()) {
std::reverse(errors.begin(), errors.end());
Local<Array> errors_array = Array::New(env->isolate(), errors.size());
for (size_t i = 0; i < errors.size(); i++) {
errors_array->Set(env->context(), i, errors[i]).FromJust();
}
exception->Set(env->context(), env->openssl_error_stack(), errors_array)
.FromJust();
}
env->isolate()->ThrowException(exception);
}
// Ensure that OpenSSL has enough entropy (at least 256 bits) for its PRNG.
// The entropy pool starts out empty and needs to fill up before the PRNG
// can be used securely. Once the pool is filled, it never dries up again;
// its contents is stirred and reused when necessary.
//
// OpenSSL normally fills the pool automatically but not when someone starts
// generating random numbers before the pool is full: in that case OpenSSL
// keeps lowering the entropy estimate to thwart attackers trying to guess
// the initial state of the PRNG.
//
// When that happens, we will have to wait until enough entropy is available.
// That should normally never take longer than a few milliseconds.
//
// OpenSSL draws from /dev/random and /dev/urandom. While /dev/random may
// block pending "true" randomness, /dev/urandom is a CSPRNG that doesn't
// block under normal circumstances.
//
// The only time when /dev/urandom may conceivably block is right after boot,
// when the whole system is still low on entropy. That's not something we can
// do anything about.
inline void CheckEntropy() {
for (;;) {
int status = RAND_status();
CHECK_GE(status, 0); // Cannot fail.
if (status != 0)
break;
// Give up, RAND_poll() not supported.
if (RAND_poll() == 0)
break;
}
}
bool EntropySource(unsigned char* buffer, size_t length) {
// Ensure that OpenSSL's PRNG is properly seeded.
CheckEntropy();
// RAND_bytes() can return 0 to indicate that the entropy data is not truly
// random. That's okay, it's still better than V8's stock source of entropy,
// which is /dev/urandom on UNIX platforms and the current time on Windows.
return RAND_bytes(buffer, length) != -1;
}
void SecureContext::Initialize(Environment* env, Local<Object> target) {
Local<FunctionTemplate> t = env->NewFunctionTemplate(SecureContext::New);
t->InstanceTemplate()->SetInternalFieldCount(1);
Local<String> secureContextString =
FIXED_ONE_BYTE_STRING(env->isolate(), "SecureContext");
t->SetClassName(secureContextString);
env->SetProtoMethod(t, "init", Init);
env->SetProtoMethod(t, "setKey", SetKey);
env->SetProtoMethod(t, "setCert", SetCert);
env->SetProtoMethod(t, "addCACert", AddCACert);
env->SetProtoMethod(t, "addCRL", AddCRL);
env->SetProtoMethod(t, "addRootCerts", AddRootCerts);
env->SetProtoMethod(t, "setCiphers", SetCiphers);
env->SetProtoMethod(t, "setECDHCurve", SetECDHCurve);
env->SetProtoMethod(t, "setDHParam", SetDHParam);
env->SetProtoMethod(t, "setOptions", SetOptions);
env->SetProtoMethod(t, "setSessionIdContext", SetSessionIdContext);
env->SetProtoMethod(t, "setSessionTimeout", SetSessionTimeout);
env->SetProtoMethod(t, "close", Close);
env->SetProtoMethod(t, "loadPKCS12", LoadPKCS12);
#ifndef OPENSSL_NO_ENGINE
env->SetProtoMethod(t, "setClientCertEngine", SetClientCertEngine);
#endif // !OPENSSL_NO_ENGINE
env->SetProtoMethod(t, "getTicketKeys", GetTicketKeys);
env->SetProtoMethod(t, "setTicketKeys", SetTicketKeys);
env->SetProtoMethod(t, "setFreeListLength", SetFreeListLength);
env->SetProtoMethod(t, "enableTicketKeyCallback", EnableTicketKeyCallback);
env->SetProtoMethod(t, "getCertificate", GetCertificate<true>);
env->SetProtoMethod(t, "getIssuer", GetCertificate<false>);
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "kTicketKeyReturnIndex"),
Integer::NewFromUnsigned(env->isolate(), kTicketKeyReturnIndex));
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "kTicketKeyHMACIndex"),
Integer::NewFromUnsigned(env->isolate(), kTicketKeyHMACIndex));
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "kTicketKeyAESIndex"),
Integer::NewFromUnsigned(env->isolate(), kTicketKeyAESIndex));
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "kTicketKeyNameIndex"),
Integer::NewFromUnsigned(env->isolate(), kTicketKeyNameIndex));
t->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "kTicketKeyIVIndex"),
Integer::NewFromUnsigned(env->isolate(), kTicketKeyIVIndex));
Local<FunctionTemplate> ctx_getter_templ =
FunctionTemplate::New(env->isolate(),
CtxGetter,
env->as_external(),
Signature::New(env->isolate(), t));
t->PrototypeTemplate()->SetAccessorProperty(
FIXED_ONE_BYTE_STRING(env->isolate(), "_external"),
ctx_getter_templ,
Local<FunctionTemplate>(),
static_cast<PropertyAttribute>(ReadOnly | DontDelete));
target->Set(secureContextString, t->GetFunction());
env->set_secure_context_constructor_template(t);
}
void SecureContext::New(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
new SecureContext(env, args.This());
}
void SecureContext::Init(const FunctionCallbackInfo<Value>& args) {
SecureContext* sc;
ASSIGN_OR_RETURN_UNWRAP(&sc, args.Holder());
Environment* env = sc->env();
const SSL_METHOD* method = TLS_method();
if (args.Length() == 1 && args[0]->IsString()) {
const node::Utf8Value sslmethod(env->isolate(), args[0]);
// Note that SSLv2 and SSLv3 are disallowed but SSLv23_method and friends
// are still accepted. They are OpenSSL's way of saying that all known
// protocols are supported unless explicitly disabled (which we do below
// for SSLv2 and SSLv3.)
if (strcmp(*sslmethod, "SSLv2_method") == 0) {
return env->ThrowError("SSLv2 methods disabled");
} else if (strcmp(*sslmethod, "SSLv2_server_method") == 0) {
return env->ThrowError("SSLv2 methods disabled");
} else if (strcmp(*sslmethod, "SSLv2_client_method") == 0) {
return env->ThrowError("SSLv2 methods disabled");
} else if (strcmp(*sslmethod, "SSLv3_method") == 0) {
return env->ThrowError("SSLv3 methods disabled");
} else if (strcmp(*sslmethod, "SSLv3_server_method") == 0) {
return env->ThrowError("SSLv3 methods disabled");
} else if (strcmp(*sslmethod, "SSLv3_client_method") == 0) {
return env->ThrowError("SSLv3 methods disabled");
} else if (strcmp(*sslmethod, "SSLv23_method") == 0) {
method = SSLv23_method();
} else if (strcmp(*sslmethod, "SSLv23_server_method") == 0) {
method = SSLv23_server_method();
} else if (strcmp(*sslmethod, "SSLv23_client_method") == 0) {
method = SSLv23_client_method();
} else if (strcmp(*sslmethod, "TLSv1_method") == 0) {
method = TLSv1_method();
} else if (strcmp(*sslmethod, "TLSv1_server_method") == 0) {
method = TLSv1_server_method();
} else if (strcmp(*sslmethod, "TLSv1_client_method") == 0) {
method = TLSv1_client_method();
} else if (strcmp(*sslmethod, "TLSv1_1_method") == 0) {
method = TLSv1_1_method();
} else if (strcmp(*sslmethod, "TLSv1_1_server_method") == 0) {
method = TLSv1_1_server_method();
} else if (strcmp(*sslmethod, "TLSv1_1_client_method") == 0) {
method = TLSv1_1_client_method();
} else if (strcmp(*sslmethod, "TLSv1_2_method") == 0) {
method = TLSv1_2_method();
} else if (strcmp(*sslmethod, "TLSv1_2_server_method") == 0) {
method = TLSv1_2_server_method();
} else if (strcmp(*sslmethod, "TLSv1_2_client_method") == 0) {
method = TLSv1_2_client_method();
} else {
return env->ThrowError("Unknown method");
}
}
sc->ctx_ = SSL_CTX_new(method);
SSL_CTX_set_app_data(sc->ctx_, sc);
// Disable SSLv2 in the case when method == TLS_method() and the
// cipher list contains SSLv2 ciphers (not the default, should be rare.)
// The bundled OpenSSL doesn't have SSLv2 support but the system OpenSSL may.
// SSLv3 is disabled because it's susceptible to downgrade attacks (POODLE.)
SSL_CTX_set_options(sc->ctx_, SSL_OP_NO_SSLv2);
SSL_CTX_set_options(sc->ctx_, SSL_OP_NO_SSLv3);
// SSL session cache configuration
SSL_CTX_set_session_cache_mode(sc->ctx_,
SSL_SESS_CACHE_SERVER |
SSL_SESS_CACHE_NO_INTERNAL |
SSL_SESS_CACHE_NO_AUTO_CLEAR);
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
// OpenSSL 1.1.0 changed the ticket key size, but the OpenSSL 1.0.x size was
// exposed in the public API. To retain compatibility, install a callback
// which restores the old algorithm.
if (RAND_bytes(sc->ticket_key_name_, sizeof(sc->ticket_key_name_)) <= 0 ||
RAND_bytes(sc->ticket_key_hmac_, sizeof(sc->ticket_key_hmac_)) <= 0 ||
RAND_bytes(sc->ticket_key_aes_, sizeof(sc->ticket_key_aes_)) <= 0) {
return env->ThrowError("Error generating ticket keys");
}
SSL_CTX_set_tlsext_ticket_key_cb(sc->ctx_,
SecureContext::TicketCompatibilityCallback);
#endif
}
// Takes a string or buffer and loads it into a BIO.
// Caller responsible for BIO_free_all-ing the returned object.
static BIO* LoadBIO(Environment* env, Local<Value> v) {
HandleScope scope(env->isolate());
if (v->IsString()) {
const node::Utf8Value s(env->isolate(), v);
return NodeBIO::NewFixed(*s, s.length());
}
if (Buffer::HasInstance(v)) {
return NodeBIO::NewFixed(Buffer::Data(v), Buffer::Length(v));
}
return nullptr;
}
void SecureContext::SetKey(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
SecureContext* sc;
ASSIGN_OR_RETURN_UNWRAP(&sc, args.Holder());
unsigned int len = args.Length();
if (len < 1) {
return env->ThrowError("Private key argument is mandatory");
}
if (len > 2) {
return env->ThrowError("Only private key and pass phrase are expected");
}
if (len == 2) {
if (args[1]->IsUndefined() || args[1]->IsNull())
len = 1;
else
THROW_AND_RETURN_IF_NOT_STRING(args[1], "Pass phrase");
}
BIO *bio = LoadBIO(env, args[0]);
if (!bio)
return;
node::Utf8Value passphrase(env->isolate(), args[1]);
EVP_PKEY* key = PEM_read_bio_PrivateKey(bio,
nullptr,
PasswordCallback,
len == 1 ? nullptr : *passphrase);
if (!key) {
BIO_free_all(bio);
unsigned long err = ERR_get_error(); // NOLINT(runtime/int)
if (!err) {
return env->ThrowError("PEM_read_bio_PrivateKey");
}
return ThrowCryptoError(env, err);
}
int rv = SSL_CTX_use_PrivateKey(sc->ctx_, key);
EVP_PKEY_free(key);
BIO_free_all(bio);
if (!rv) {
unsigned long err = ERR_get_error(); // NOLINT(runtime/int)
if (!err)
return env->ThrowError("SSL_CTX_use_PrivateKey");
return ThrowCryptoError(env, err);
}
}
int SSL_CTX_get_issuer(SSL_CTX* ctx, X509* cert, X509** issuer) {
X509_STORE* store = SSL_CTX_get_cert_store(ctx);
X509_STORE_CTX* store_ctx = X509_STORE_CTX_new();
int ret = store_ctx != nullptr &&
X509_STORE_CTX_init(store_ctx, store, nullptr, nullptr) == 1 &&
X509_STORE_CTX_get1_issuer(issuer, store_ctx, cert) == 1;
X509_STORE_CTX_free(store_ctx);
return ret;
}
int SSL_CTX_use_certificate_chain(SSL_CTX* ctx,
X509* x,
STACK_OF(X509)* extra_certs,
X509** cert,
X509** issuer) {
CHECK_EQ(*issuer, nullptr);
CHECK_EQ(*cert, nullptr);
int ret = SSL_CTX_use_certificate(ctx, x);
if (ret) {
// If we could set up our certificate, now proceed to
// the CA certificates.
int r;
SSL_CTX_clear_extra_chain_certs(ctx);
for (int i = 0; i < sk_X509_num(extra_certs); i++) {
X509* ca = sk_X509_value(extra_certs, i);
// NOTE: Increments reference count on `ca`
r = SSL_CTX_add1_chain_cert(ctx, ca);
if (!r) {
ret = 0;
*issuer = nullptr;
goto end;
}
// Note that we must not free r if it was successfully
// added to the chain (while we must free the main
// certificate, since its reference count is increased
// by SSL_CTX_use_certificate).
// Find issuer
if (*issuer != nullptr || X509_check_issued(ca, x) != X509_V_OK)
continue;
*issuer = ca;
}
}
// Try getting issuer from a cert store
if (ret) {
if (*issuer == nullptr) {
ret = SSL_CTX_get_issuer(ctx, x, issuer);
ret = ret < 0 ? 0 : 1;
// NOTE: get_cert_store doesn't increment reference count,
// no need to free `store`
} else {
// Increment issuer reference count
*issuer = X509_dup(*issuer);
if (*issuer == nullptr) {
ret = 0;
goto end;
}
}
}
end:
if (ret && x != nullptr) {
*cert = X509_dup(x);
if (*cert == nullptr)
ret = 0;
}
return ret;
}
// Read a file that contains our certificate in "PEM" format,
// possibly followed by a sequence of CA certificates that should be
// sent to the peer in the Certificate message.
//
// Taken from OpenSSL - edited for style.
int SSL_CTX_use_certificate_chain(SSL_CTX* ctx,
BIO* in,
X509** cert,
X509** issuer) {
X509* x = nullptr;
// Just to ensure that `ERR_peek_last_error` below will return only errors
// that we are interested in
ERR_clear_error();
x = PEM_read_bio_X509_AUX(in, nullptr, NoPasswordCallback, nullptr);
if (x == nullptr) {
return 0;
}
X509* extra = nullptr;
int ret = 0;
unsigned long err = 0; // NOLINT(runtime/int)
StackOfX509 extra_certs(sk_X509_new_null());
if (!extra_certs)
goto done;
while ((extra = PEM_read_bio_X509(in,
nullptr,
NoPasswordCallback,
nullptr))) {
if (sk_X509_push(extra_certs.get(), extra))
continue;
// Failure, free all certs
goto done;
}
extra = nullptr;
// When the while loop ends, it's usually just EOF.
err = ERR_peek_last_error();
if (ERR_GET_LIB(err) == ERR_LIB_PEM &&
ERR_GET_REASON(err) == PEM_R_NO_START_LINE) {
ERR_clear_error();
} else {
// some real error
goto done;
}
ret = SSL_CTX_use_certificate_chain(ctx, x, extra_certs.get(), cert, issuer);
if (!ret)
goto done;
done:
if (extra != nullptr)
X509_free(extra);
if (x != nullptr)
X509_free(x);
return ret;
}
void SecureContext::SetCert(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
SecureContext* sc;
ASSIGN_OR_RETURN_UNWRAP(&sc, args.Holder());
if (args.Length() != 1) {
return env->ThrowTypeError("Certificate argument is mandatory");
}
BIO* bio = LoadBIO(env, args[0]);
if (!bio)
return;
// Free previous certs
if (sc->issuer_ != nullptr) {
X509_free(sc->issuer_);
sc->issuer_ = nullptr;
}
if (sc->cert_ != nullptr) {
X509_free(sc->cert_);
sc->cert_ = nullptr;
}
int rv = SSL_CTX_use_certificate_chain(sc->ctx_,
bio,
&sc->cert_,
&sc->issuer_);
BIO_free_all(bio);
if (!rv) {
unsigned long err = ERR_get_error(); // NOLINT(runtime/int)
if (!err) {
return env->ThrowError("SSL_CTX_use_certificate_chain");
}
return ThrowCryptoError(env, err);
}
}
static X509_STORE* NewRootCertStore() {
static std::vector<X509*> root_certs_vector;
if (root_certs_vector.empty()) {
for (size_t i = 0; i < arraysize(root_certs); i++) {
BIO* bp = NodeBIO::NewFixed(root_certs[i], strlen(root_certs[i]));
X509 *x509 = PEM_read_bio_X509(bp, nullptr, NoPasswordCallback, nullptr);
BIO_free(bp);
// Parse errors from the built-in roots are fatal.
CHECK_NE(x509, nullptr);
root_certs_vector.push_back(x509);
}
}
X509_STORE* store = X509_STORE_new();
if (*system_cert_path != '\0') {
X509_STORE_load_locations(store, system_cert_path, nullptr);
}
if (ssl_openssl_cert_store) {
X509_STORE_set_default_paths(store);
} else {
for (X509 *cert : root_certs_vector) {
X509_up_ref(cert);
X509_STORE_add_cert(store, cert);
}
}
return store;
}
void SecureContext::AddCACert(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
SecureContext* sc;
ASSIGN_OR_RETURN_UNWRAP(&sc, args.Holder());
ClearErrorOnReturn clear_error_on_return;
if (args.Length() != 1) {
return env->ThrowTypeError("CA certificate argument is mandatory");
}
BIO* bio = LoadBIO(env, args[0]);
if (!bio) {
return;
}
X509_STORE* cert_store = SSL_CTX_get_cert_store(sc->ctx_);
while (X509* x509 =
PEM_read_bio_X509(bio, nullptr, NoPasswordCallback, nullptr)) {
if (cert_store == root_cert_store) {
cert_store = NewRootCertStore();
SSL_CTX_set_cert_store(sc->ctx_, cert_store);
}
X509_STORE_add_cert(cert_store, x509);
SSL_CTX_add_client_CA(sc->ctx_, x509);
X509_free(x509);
}
BIO_free_all(bio);
}
void SecureContext::AddCRL(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
SecureContext* sc;
ASSIGN_OR_RETURN_UNWRAP(&sc, args.Holder());
if (args.Length() != 1) {
return env->ThrowTypeError("CRL argument is mandatory");
}
ClearErrorOnReturn clear_error_on_return;
BIO *bio = LoadBIO(env, args[0]);
if (!bio)
return;
X509_CRL* crl =
PEM_read_bio_X509_CRL(bio, nullptr, NoPasswordCallback, nullptr);
if (crl == nullptr) {
BIO_free_all(bio);
return env->ThrowError("Failed to parse CRL");
}
X509_STORE* cert_store = SSL_CTX_get_cert_store(sc->ctx_);
if (cert_store == root_cert_store) {
cert_store = NewRootCertStore();
SSL_CTX_set_cert_store(sc->ctx_, cert_store);
}
X509_STORE_add_crl(cert_store, crl);
X509_STORE_set_flags(cert_store,
X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL);
BIO_free_all(bio);
X509_CRL_free(crl);
}
void UseExtraCaCerts(const std::string& file) {
extra_root_certs_file = file;
}
static unsigned long AddCertsFromFile( // NOLINT(runtime/int)
X509_STORE* store,
const char* file) {
ERR_clear_error();
MarkPopErrorOnReturn mark_pop_error_on_return;
BIO* bio = BIO_new_file(file, "r");
if (!bio) {
return ERR_get_error();
}
while (X509* x509 =
PEM_read_bio_X509(bio, nullptr, NoPasswordCallback, nullptr)) {
X509_STORE_add_cert(store, x509);
X509_free(x509);
}
BIO_free_all(bio);
unsigned long err = ERR_peek_error(); // NOLINT(runtime/int)
// Ignore error if its EOF/no start line found.
if (ERR_GET_LIB(err) == ERR_LIB_PEM &&
ERR_GET_REASON(err) == PEM_R_NO_START_LINE) {
return 0;
}