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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_mutex.h"
#include "tls_wrap.h" // TLSWrap
#include "async-wrap.h"
#include "async-wrap-inl.h"
#include "env.h"
#include "env-inl.h"
#include "string_bytes.h"
#include "util.h"
#include "util-inl.h"
#include "v8.h"
// CNNIC Hash WhiteList is taken from
// https://hg.mozilla.org/mozilla-central/raw-file/98820360ab66/security/
// certverifier/CNNICHashWhitelist.inc
#include "CNNICHashWhitelist.inc"
// StartCom and WoSign root CA list is taken from
// https://hg.mozilla.org/mozilla-central/file/tip/security/certverifier/
// StartComAndWoSignData.inc
#include "StartComAndWoSignData.inc"
#include <errno.h>
#include <limits.h> // INT_MAX
#include <math.h>
#include <stdlib.h>
#include <string.h>
#define THROW_AND_RETURN_IF_NOT_STRING_OR_BUFFER(val, prefix) \
do { \
if (!Buffer::HasInstance(val) && !val->IsString()) { \
return env->ThrowTypeError(prefix " must be a string or a buffer"); \
} \
} while (0)
#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::AccessorSignature;
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::False;
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::Persistent;
using v8::PropertyAttribute;
using v8::PropertyCallbackInfo;
using v8::ReadOnly;
using v8::String;
using v8::Value;
// Subject DER of CNNIC ROOT CA and CNNIC EV ROOT CA are taken from
// https://hg.mozilla.org/mozilla-central/file/98820360ab66/security/
// certverifier/NSSCertDBTrustDomain.cpp#l672
// C = CN, O = CNNIC, CN = CNNIC ROOT
static const uint8_t CNNIC_ROOT_CA_SUBJECT_DATA[] =
"\x30\x32\x31\x0B\x30\x09\x06\x03\x55\x04\x06\x13\x02\x43\x4E\x31\x0E\x30"
"\x0C\x06\x03\x55\x04\x0A\x13\x05\x43\x4E\x4E\x49\x43\x31\x13\x30\x11\x06"
"\x03\x55\x04\x03\x13\x0A\x43\x4E\x4E\x49\x43\x20\x52\x4F\x4F\x54";
static const uint8_t* cnnic_p = CNNIC_ROOT_CA_SUBJECT_DATA;
static X509_NAME* cnnic_name =
d2i_X509_NAME(nullptr, &cnnic_p, sizeof(CNNIC_ROOT_CA_SUBJECT_DATA)-1);
// C = CN, O = China Internet Network Information Center, CN = China
// Internet Network Information Center EV Certificates Root
static const uint8_t CNNIC_EV_ROOT_CA_SUBJECT_DATA[] =
"\x30\x81\x8A\x31\x0B\x30\x09\x06\x03\x55\x04\x06\x13\x02\x43\x4E\x31\x32"
"\x30\x30\x06\x03\x55\x04\x0A\x0C\x29\x43\x68\x69\x6E\x61\x20\x49\x6E\x74"
"\x65\x72\x6E\x65\x74\x20\x4E\x65\x74\x77\x6F\x72\x6B\x20\x49\x6E\x66\x6F"
"\x72\x6D\x61\x74\x69\x6F\x6E\x20\x43\x65\x6E\x74\x65\x72\x31\x47\x30\x45"
"\x06\x03\x55\x04\x03\x0C\x3E\x43\x68\x69\x6E\x61\x20\x49\x6E\x74\x65\x72"
"\x6E\x65\x74\x20\x4E\x65\x74\x77\x6F\x72\x6B\x20\x49\x6E\x66\x6F\x72\x6D"
"\x61\x74\x69\x6F\x6E\x20\x43\x65\x6E\x74\x65\x72\x20\x45\x56\x20\x43\x65"
"\x72\x74\x69\x66\x69\x63\x61\x74\x65\x73\x20\x52\x6F\x6F\x74";
static const uint8_t* cnnic_ev_p = CNNIC_EV_ROOT_CA_SUBJECT_DATA;
static X509_NAME *cnnic_ev_name =
d2i_X509_NAME(nullptr, &cnnic_ev_p,
sizeof(CNNIC_EV_ROOT_CA_SUBJECT_DATA)-1);
static Mutex* mutexes;
static const char* const root_certs[] = {
#include "node_root_certs.h" // NOLINT(build/include_order)
};
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>::InitNPN(SecureContext* sc);
template void SSLWrap<TLSWrap>::SetSNIContext(SecureContext* sc);
template int SSLWrap<TLSWrap>::SetCACerts(SecureContext* sc);
template SSL_SESSION* SSLWrap<TLSWrap>::GetSessionCallback(
SSL* s,
unsigned char* key,
int len,
int* copy);
template int SSLWrap<TLSWrap>::NewSessionCallback(SSL* s,
SSL_SESSION* sess);
template void SSLWrap<TLSWrap>::OnClientHello(
void* arg,
const ClientHelloParser::ClientHello& hello);
#ifndef OPENSSL_NO_NEXTPROTONEG
template int SSLWrap<TLSWrap>::AdvertiseNextProtoCallback(
SSL* s,
const unsigned char** data,
unsigned int* len,
void* arg);
template int SSLWrap<TLSWrap>::SelectNextProtoCallback(
SSL* s,
unsigned char** out,
unsigned char* outlen,
const unsigned char* in,
unsigned int inlen,
void* arg);
#endif
#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
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();
}
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;
}
// 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>();
ERR_STATE* es = ERR_get_state();
if (es->bottom != es->top) {
Local<Array> error_stack = Array::New(env->isolate());
int top = es->top;
// Build the error_stack array to be added to opensslErrorStack property.
for (unsigned int i = 0; es->bottom != es->top;) {
unsigned long err_buf = es->err_buffer[es->top]; // NOLINT(runtime/int)
// Only add error string if there is valid err_buffer.
if (err_buf) {
char tmp_str[256];
ERR_error_string_n(err_buf, tmp_str, sizeof(tmp_str));
error_stack->Set(env->context(), i,
String::NewFromUtf8(env->isolate(), tmp_str,
v8::NewStringType::kNormal)
.ToLocalChecked()).FromJust();
// Only increment if we added to error_stack.
i++;
}
// Since the ERR_STATE is a ring buffer, we need to use modular
// arithmetic to loop back around in the case where bottom is after top.
// Using ERR_NUM_ERRORS macro defined in openssl.
es->top = (((es->top - 1) % ERR_NUM_ERRORS) + ERR_NUM_ERRORS) %
ERR_NUM_ERRORS;
}
// Restore top.
es->top = top;
// Add the opensslErrorStack property to the exception object.
// The new property will look like the following:
// opensslErrorStack: [
// 'error:0906700D:PEM routines:PEM_ASN1_read_bio:ASN1 lib',
// 'error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1 err'
// ]
exception->Set(env->context(), env->openssl_error_stack(), error_stack)
.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", SecureContext::Init);
env->SetProtoMethod(t, "setKey", SecureContext::SetKey);
env->SetProtoMethod(t, "setCert", SecureContext::SetCert);
env->SetProtoMethod(t, "addCACert", SecureContext::AddCACert);
env->SetProtoMethod(t, "addCRL", SecureContext::AddCRL);
env->SetProtoMethod(t, "addRootCerts", SecureContext::AddRootCerts);
env->SetProtoMethod(t, "setCiphers", SecureContext::SetCiphers);
env->SetProtoMethod(t, "setECDHCurve", SecureContext::SetECDHCurve);
env->SetProtoMethod(t, "setDHParam", SecureContext::SetDHParam);
env->SetProtoMethod(t, "setOptions", SecureContext::SetOptions);
env->SetProtoMethod(t, "setSessionIdContext",
SecureContext::SetSessionIdContext);
env->SetProtoMethod(t, "setSessionTimeout",
SecureContext::SetSessionTimeout);
env->SetProtoMethod(t, "close", SecureContext::Close);
env->SetProtoMethod(t, "loadPKCS12", SecureContext::LoadPKCS12);
env->SetProtoMethod(t, "getTicketKeys", SecureContext::GetTicketKeys);
env->SetProtoMethod(t, "setTicketKeys", SecureContext::SetTicketKeys);
env->SetProtoMethod(t, "setFreeListLength", SecureContext::SetFreeListLength);
env->SetProtoMethod(t,
"enableTicketKeyCallback",
SecureContext::EnableTicketKeyCallback);
env->SetProtoMethod(t, "getCertificate", SecureContext::GetCertificate<true>);
env->SetProtoMethod(t, "getIssuer", SecureContext::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));
t->PrototypeTemplate()->SetAccessor(
FIXED_ONE_BYTE_STRING(env->isolate(), "_external"),
CtxGetter,
nullptr,
env->as_external(),
DEFAULT,
static_cast<PropertyAttribute>(ReadOnly | DontDelete),
AccessorSignature::New(env->isolate(), t));
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 = SSLv23_method();
if (args.Length() == 1 && args[0]->IsString()) {
const node::Utf8Value sslmethod(env->isolate(), args[0]);
// Note that SSLv2 and SSLv3 are disallowed but SSLv2_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 == SSLv23_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);
SSL_CTX_sess_set_get_cb(sc->ctx_, SSLWrap<Connection>::GetSessionCallback);
SSL_CTX_sess_set_new_cb(sc->ctx_, SSLWrap<Connection>::NewSessionCallback);
}
// 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) {
int ret;
X509_STORE* store = SSL_CTX_get_cert_store(ctx);
X509_STORE_CTX store_ctx;
ret = X509_STORE_CTX_init(&store_ctx, store, nullptr, nullptr);
if (!ret)
goto end;
ret = X509_STORE_CTX_get1_issuer(issuer, &store_ctx, cert);
X509_STORE_CTX_cleanup(&store_ctx);
end:
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) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE, ERR_R_PEM_LIB);
return 0;
}
X509* extra = nullptr;
int ret = 0;
unsigned long err = 0; // NOLINT(runtime/int)
// Read extra certs
STACK_OF(X509)* extra_certs = sk_X509_new_null();
if (extra_certs == nullptr) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE, ERR_R_MALLOC_FAILURE);
goto done;
}
while ((extra = PEM_read_bio_X509(in,
nullptr,
NoPasswordCallback,
nullptr))) {
if (sk_X509_push(extra_certs, 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, cert, issuer);
if (!ret)
goto done;
done:
if (extra_certs != nullptr)
sk_X509_pop_free(extra_certs, X509_free);
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);
}
}
#if OPENSSL_VERSION_NUMBER < 0x10100000L && !defined(OPENSSL_IS_BORINGSSL)
// This section contains OpenSSL 1.1.0 functions reimplemented for OpenSSL
// 1.0.2 so that the following code can be written without lots of #if lines.
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;
}
#endif // OPENSSL_VERSION_NUMBER < 0x10100000L && !OPENSSL_IS_BORINGSSL
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 (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;
}
return err;
}
void SecureContext::AddRootCerts(const FunctionCallbackInfo<Value>& args) {
SecureContext* sc;
ASSIGN_OR_RETURN_UNWRAP(&sc, args.Holder());
ClearErrorOnReturn clear_error_on_return;
if (!root_cert_store) {
root_cert_store = NewRootCertStore();
if (!extra_root_certs_file.empty()) {
unsigned long err = AddCertsFromFile( // NOLINT(runtime/int)
root_cert_store,
extra_root_certs_file.c_str());
if (err) {
ProcessEmitWarning(sc->env(),
"Ignoring extra certs from `%s`, load failed: %s\n",
extra_root_certs_file.c_str(),
ERR_error_string(err, nullptr));
}
}
}
// Increment reference count so global store is not deleted along with CTX.
X509_STORE_up_ref(root_cert_store);
SSL_CTX_set_cert_store(sc->ctx_, root_cert_store);
}
void SecureContext::SetCiphers(const FunctionCallbackInfo<Value>& args) {
SecureContext* sc;
ASSIGN_OR_RETURN_UNWRAP(&sc, args.Holder());
Environment* env = sc->env();
ClearErrorOnReturn clear_error_on_return;
if (args.Length() != 1) {
return env->ThrowTypeError("Ciphers argument is mandatory");
}
THROW_AND_RETURN_IF_NOT_STRING(args[0], "Ciphers");
const node::Utf8Value ciphers(args.GetIsolate(), args[0]);
SSL_CTX_set_cipher_list(sc->ctx_, *ciphers);
}
void SecureContext::SetECDHCurve(const FunctionCallbackInfo<Value>& args) {
SecureContext* sc;
ASSIGN_OR_RETURN_UNWRAP(&sc, args.Holder());
Environment* env = sc->env();
if (args.Length() != 1)
return env->ThrowTypeError("ECDH curve name argument is mandatory");
THROW_AND_RETURN_IF_NOT_STRING(args[0], "ECDH curve name");
node::Utf8Value curve(env->isolate(), args[0]);
SSL_CTX_set_options(sc->ctx_, SSL_OP_SINGLE_ECDH_USE);
SSL_CTX_set_ecdh_auto(sc->ctx_, 1);
if (strcmp(*curve, "auto") == 0)
return;
if (!SSL_CTX_set1_curves_list(sc->ctx_, *curve))
return env->ThrowError("Failed to set ECDH curve");
}
void SecureContext::SetDHParam(const FunctionCallbackInfo<Value>& args) {
SecureContext* sc;
ASSIGN_OR_RETURN_UNWRAP(&sc, args.This());
Environment* env = sc->env();
ClearErrorOnReturn clear_error_on_return;
// Auto DH is not supported in openssl 1.0.1, so dhparam needs
// to be specified explicitly
if (args.Length() != 1)
return env->ThrowTypeError("DH argument is mandatory");
// Invalid dhparam is silently discarded and DHE is no longer used.