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Mini Shell
Mini Shell
// 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_crypto.h"
#include "node_crypto_groups.h"
#include "v8.h"
#include "node.h"
#include "node_buffer.h"
#include "node_root_certs.h"
#include <string.h>
#ifdef _MSC_VER
#define strcasecmp _stricmp
#endif
#include <stdlib.h>
#include <errno.h>
#if OPENSSL_VERSION_NUMBER >= 0x10000000L
# define OPENSSL_CONST const
#else
# define OPENSSL_CONST
#endif
#define ASSERT_IS_BUFFER(val) \
if (!Buffer::HasInstance(val)) { \
return ThrowException(Exception::TypeError(String::New("Not a buffer"))); \
}
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 int X509_NAME_FLAGS = ASN1_STRFLGS_ESC_CTRL
| ASN1_STRFLGS_ESC_MSB
| XN_FLAG_SEP_MULTILINE
| XN_FLAG_FN_SN;
namespace node {
namespace crypto {
using namespace v8;
static Persistent<String> errno_symbol;
static Persistent<String> syscall_symbol;
static Persistent<String> subject_symbol;
static Persistent<String> subjectaltname_symbol;
static Persistent<String> modulus_symbol;
static Persistent<String> exponent_symbol;
static Persistent<String> issuer_symbol;
static Persistent<String> valid_from_symbol;
static Persistent<String> valid_to_symbol;
static Persistent<String> fingerprint_symbol;
static Persistent<String> name_symbol;
static Persistent<String> version_symbol;
static Persistent<String> ext_key_usage_symbol;
static Persistent<String> onhandshakestart_sym;
static Persistent<String> onhandshakedone_sym;
static Persistent<String> onclienthello_sym;
static Persistent<String> onnewsession_sym;
static Persistent<String> sessionid_sym;
static Persistent<FunctionTemplate> secure_context_constructor;
static uv_rwlock_t* locks;
static void crypto_threadid_cb(CRYPTO_THREADID* tid) {
CRYPTO_THREADID_set_numeric(tid, uv_thread_self());
}
static void crypto_lock_init(void) {
int i, n;
n = CRYPTO_num_locks();
locks = new uv_rwlock_t[n];
for (i = 0; i < n; i++)
if (uv_rwlock_init(locks + i))
abort();
}
static void crypto_lock_cb(int mode, int n, const char* file, int line) {
assert((mode & CRYPTO_LOCK) || (mode & CRYPTO_UNLOCK));
assert((mode & CRYPTO_READ) || (mode & CRYPTO_WRITE));
if (mode & CRYPTO_LOCK) {
if (mode & CRYPTO_READ)
uv_rwlock_rdlock(locks + n);
else
uv_rwlock_wrlock(locks + n);
} else {
if (mode & CRYPTO_READ)
uv_rwlock_rdunlock(locks + n);
else
uv_rwlock_wrunlock(locks + n);
}
}
Handle<Value> ThrowCryptoErrorHelper(unsigned long err, bool is_type_error) {
HandleScope scope;
char errmsg[128];
ERR_error_string_n(err, errmsg, sizeof(errmsg));
return is_type_error ? ThrowTypeError(errmsg) : ThrowError(errmsg);
}
Handle<Value> ThrowCryptoError(unsigned long err) {
return ThrowCryptoErrorHelper(err, false);
}
Handle<Value> ThrowCryptoTypeError(unsigned long err) {
return ThrowCryptoErrorHelper(err, true);
}
void SecureContext::Initialize(Handle<Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(SecureContext::New);
secure_context_constructor = Persistent<FunctionTemplate>::New(t);
t->InstanceTemplate()->SetInternalFieldCount(1);
t->SetClassName(String::NewSymbol("SecureContext"));
NODE_SET_PROTOTYPE_METHOD(t, "init", SecureContext::Init);
NODE_SET_PROTOTYPE_METHOD(t, "setKey", SecureContext::SetKey);
NODE_SET_PROTOTYPE_METHOD(t, "setCert", SecureContext::SetCert);
NODE_SET_PROTOTYPE_METHOD(t, "addCACert", SecureContext::AddCACert);
NODE_SET_PROTOTYPE_METHOD(t, "addCRL", SecureContext::AddCRL);
NODE_SET_PROTOTYPE_METHOD(t, "addRootCerts", SecureContext::AddRootCerts);
NODE_SET_PROTOTYPE_METHOD(t, "setCiphers", SecureContext::SetCiphers);
NODE_SET_PROTOTYPE_METHOD(t, "setOptions", SecureContext::SetOptions);
NODE_SET_PROTOTYPE_METHOD(t, "setSessionIdContext",
SecureContext::SetSessionIdContext);
NODE_SET_PROTOTYPE_METHOD(t, "close", SecureContext::Close);
NODE_SET_PROTOTYPE_METHOD(t, "loadPKCS12", SecureContext::LoadPKCS12);
target->Set(String::NewSymbol("SecureContext"), t->GetFunction());
}
Handle<Value> SecureContext::New(const Arguments& args) {
HandleScope scope;
SecureContext *p = new SecureContext();
p->Wrap(args.Holder());
return args.This();
}
Handle<Value> SecureContext::Init(const Arguments& args) {
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
OPENSSL_CONST SSL_METHOD *method = SSLv23_method();
if (args.Length() == 1 && args[0]->IsString()) {
String::Utf8Value sslmethod(args[0]);
if (strcmp(*sslmethod, "SSLv2_method") == 0) {
#ifndef OPENSSL_NO_SSL2
method = SSLv2_method();
#else
return ThrowException(Exception::Error(String::New("SSLv2 methods disabled")));
#endif
} else if (strcmp(*sslmethod, "SSLv2_server_method") == 0) {
#ifndef OPENSSL_NO_SSL2
method = SSLv2_server_method();
#else
return ThrowException(Exception::Error(String::New("SSLv2 methods disabled")));
#endif
} else if (strcmp(*sslmethod, "SSLv2_client_method") == 0) {
#ifndef OPENSSL_NO_SSL2
method = SSLv2_client_method();
#else
return ThrowException(Exception::Error(String::New("SSLv2 methods disabled")));
#endif
} else if (strcmp(*sslmethod, "SSLv3_method") == 0) {
method = SSLv3_method();
} else if (strcmp(*sslmethod, "SSLv3_server_method") == 0) {
method = SSLv3_server_method();
} else if (strcmp(*sslmethod, "SSLv3_client_method") == 0) {
method = SSLv3_client_method();
} 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 {
return ThrowException(Exception::Error(String::New("Unknown method")));
}
}
sc->ctx_ = SSL_CTX_new(method);
// 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_, GetSessionCallback);
SSL_CTX_sess_set_new_cb(sc->ctx_, NewSessionCallback);
sc->ca_store_ = NULL;
return True();
}
SSL_SESSION* SecureContext::GetSessionCallback(SSL* s,
unsigned char* key,
int len,
int* copy) {
HandleScope scope;
Connection* p = static_cast<Connection*>(SSL_get_app_data(s));
*copy = 0;
SSL_SESSION* sess = p->next_sess_;
p->next_sess_ = NULL;
return sess;
}
void SessionDataFree(char* data, void* hint) {
delete[] data;
}
int SecureContext::NewSessionCallback(SSL* s, SSL_SESSION* sess) {
HandleScope scope;
Connection* p = static_cast<Connection*>(SSL_get_app_data(s));
// Check if session is small enough to be stored
int size = i2d_SSL_SESSION(sess, NULL);
if (size > kMaxSessionSize) return 0;
// Serialize session
char* serialized = new char[size];
unsigned char* pserialized = reinterpret_cast<unsigned char*>(serialized);
memset(serialized, 0, size);
i2d_SSL_SESSION(sess, &pserialized);
Handle<Value> argv[2] = {
Buffer::New(reinterpret_cast<char*>(sess->session_id),
sess->session_id_length)->handle_,
Buffer::New(serialized, size, SessionDataFree, NULL)->handle_
};
if (onnewsession_sym.IsEmpty()) {
onnewsession_sym = NODE_PSYMBOL("onnewsession");
}
MakeCallback(p->handle_, onnewsession_sym, ARRAY_SIZE(argv), argv);
return 0;
}
// Takes a string or buffer and loads it into a BIO.
// Caller responsible for BIO_free-ing the returned object.
static BIO* LoadBIO (Handle<Value> v) {
BIO *bio = BIO_new(BIO_s_mem());
if (!bio) return NULL;
HandleScope scope;
int r = -1;
if (v->IsString()) {
String::Utf8Value s(v);
r = BIO_write(bio, *s, s.length());
} else if (Buffer::HasInstance(v)) {
char* buffer_data = Buffer::Data(v);
size_t buffer_length = Buffer::Length(v);
r = BIO_write(bio, buffer_data, buffer_length);
}
if (r <= 0) {
BIO_free(bio);
return NULL;
}
return bio;
}
// Takes a string or buffer and loads it into an X509
// Caller responsible for X509_free-ing the returned object.
static X509* LoadX509 (Handle<Value> v) {
HandleScope scope; // necessary?
BIO *bio = LoadBIO(v);
if (!bio) return NULL;
X509 * x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL);
if (!x509) {
BIO_free(bio);
return NULL;
}
BIO_free(bio);
return x509;
}
Handle<Value> SecureContext::SetKey(const Arguments& args) {
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
unsigned int len = args.Length();
if (len != 1 && len != 2) {
return ThrowException(Exception::TypeError(String::New("Bad parameter")));
}
if (len == 2 && !args[1]->IsString()) {
return ThrowException(Exception::TypeError(String::New("Bad parameter")));
}
BIO *bio = LoadBIO(args[0]);
if (!bio) return False();
String::Utf8Value passphrase(args[1]);
EVP_PKEY* key = PEM_read_bio_PrivateKey(bio, NULL, NULL,
len == 1 ? NULL : *passphrase);
if (!key) {
BIO_free(bio);
unsigned long err = ERR_get_error();
if (!err) {
return ThrowException(Exception::Error(
String::New("PEM_read_bio_PrivateKey")));
}
return ThrowCryptoError(err);
}
SSL_CTX_use_PrivateKey(sc->ctx_, key);
EVP_PKEY_free(key);
BIO_free(bio);
return True();
}
// 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 - editted for style.
int SSL_CTX_use_certificate_chain(SSL_CTX *ctx, BIO *in) {
int ret = 0;
X509 *x = NULL;
x = PEM_read_bio_X509_AUX(in, NULL, NULL, NULL);
if (x == NULL) {
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE, ERR_R_PEM_LIB);
goto end;
}
ret = SSL_CTX_use_certificate(ctx, x);
if (ERR_peek_error() != 0) {
// Key/certificate mismatch doesn't imply ret==0 ...
ret = 0;
}
if (ret) {
// If we could set up our certificate, now proceed to
// the CA certificates.
X509 *ca;
int r;
unsigned long err;
if (ctx->extra_certs != NULL) {
sk_X509_pop_free(ctx->extra_certs, X509_free);
ctx->extra_certs = NULL;
}
while ((ca = PEM_read_bio_X509(in, NULL, NULL, NULL))) {
r = SSL_CTX_add_extra_chain_cert(ctx, ca);
if (!r) {
X509_free(ca);
ret = 0;
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).
}
// 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
ret = 0;
}
}
end:
if (x != NULL) X509_free(x);
return ret;
}
Handle<Value> SecureContext::SetCert(const Arguments& args) {
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
if (args.Length() != 1) {
return ThrowException(Exception::TypeError(
String::New("Bad parameter")));
}
BIO* bio = LoadBIO(args[0]);
if (!bio) return False();
int rv = SSL_CTX_use_certificate_chain(sc->ctx_, bio);
BIO_free(bio);
if (!rv) {
unsigned long err = ERR_get_error();
if (!err) {
return ThrowException(Exception::Error(
String::New("SSL_CTX_use_certificate_chain")));
}
return ThrowCryptoError(err);
}
return True();
}
Handle<Value> SecureContext::AddCACert(const Arguments& args) {
bool newCAStore = false;
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
if (args.Length() != 1) {
return ThrowException(Exception::TypeError(String::New("Bad parameter")));
}
if (!sc->ca_store_) {
sc->ca_store_ = X509_STORE_new();
newCAStore = true;
}
X509* x509 = LoadX509(args[0]);
if (!x509) return False();
X509_STORE_add_cert(sc->ca_store_, x509);
SSL_CTX_add_client_CA(sc->ctx_, x509);
X509_free(x509);
if (newCAStore) {
SSL_CTX_set_cert_store(sc->ctx_, sc->ca_store_);
}
return True();
}
Handle<Value> SecureContext::AddCRL(const Arguments& args) {
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
if (args.Length() != 1) {
return ThrowException(Exception::TypeError(String::New("Bad parameter")));
}
BIO *bio = LoadBIO(args[0]);
if (!bio) return False();
X509_CRL *x509 = PEM_read_bio_X509_CRL(bio, NULL, NULL, NULL);
if (x509 == NULL) {
BIO_free(bio);
return False();
}
X509_STORE_add_crl(sc->ca_store_, x509);
X509_STORE_set_flags(sc->ca_store_, X509_V_FLAG_CRL_CHECK |
X509_V_FLAG_CRL_CHECK_ALL);
BIO_free(bio);
X509_CRL_free(x509);
return True();
}
Handle<Value> SecureContext::AddRootCerts(const Arguments& args) {
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
assert(sc->ca_store_ == NULL);
if (!root_cert_store) {
root_cert_store = X509_STORE_new();
for (int i = 0; root_certs[i]; i++) {
BIO *bp = BIO_new(BIO_s_mem());
if (!BIO_write(bp, root_certs[i], strlen(root_certs[i]))) {
BIO_free(bp);
return False();
}
X509 *x509 = PEM_read_bio_X509(bp, NULL, NULL, NULL);
if (x509 == NULL) {
BIO_free(bp);
return False();
}
X509_STORE_add_cert(root_cert_store, x509);
BIO_free(bp);
X509_free(x509);
}
}
sc->ca_store_ = root_cert_store;
SSL_CTX_set_cert_store(sc->ctx_, sc->ca_store_);
return True();
}
Handle<Value> SecureContext::SetCiphers(const Arguments& args) {
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
if (args.Length() != 1 || !args[0]->IsString()) {
return ThrowException(Exception::TypeError(String::New("Bad parameter")));
}
String::Utf8Value ciphers(args[0]);
SSL_CTX_set_cipher_list(sc->ctx_, *ciphers);
return True();
}
Handle<Value> SecureContext::SetOptions(const Arguments& args) {
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
if (args.Length() != 1 || !args[0]->IntegerValue()) {
return ThrowException(Exception::TypeError(String::New("Bad parameter")));
}
SSL_CTX_set_options(sc->ctx_, args[0]->IntegerValue());
return True();
}
Handle<Value> SecureContext::SetSessionIdContext(const Arguments& args) {
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
if (args.Length() != 1 || !args[0]->IsString()) {
return ThrowException(Exception::TypeError(String::New("Bad parameter")));
}
String::Utf8Value sessionIdContext(args[0]);
const unsigned char* sid_ctx = (const unsigned char*) *sessionIdContext;
unsigned int sid_ctx_len = sessionIdContext.length();
int r = SSL_CTX_set_session_id_context(sc->ctx_, sid_ctx, sid_ctx_len);
if (r != 1) {
Local<String> message;
BIO* bio;
BUF_MEM* mem;
if ((bio = BIO_new(BIO_s_mem()))) {
ERR_print_errors(bio);
BIO_get_mem_ptr(bio, &mem);
message = String::New(mem->data, mem->length);
BIO_free(bio);
} else {
message = String::New("SSL_CTX_set_session_id_context error");
}
return ThrowException(Exception::TypeError(message));
}
return True();
}
Handle<Value> SecureContext::Close(const Arguments& args) {
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
sc->FreeCTXMem();
return False();
}
//Takes .pfx or .p12 and password in string or buffer format
Handle<Value> SecureContext::LoadPKCS12(const Arguments& args) {
HandleScope scope;
BIO* in = NULL;
PKCS12* p12 = NULL;
EVP_PKEY* pkey = NULL;
X509* cert = NULL;
STACK_OF(X509)* extraCerts = NULL;
char* pass = NULL;
bool ret = false;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
if (args.Length() < 1) {
return ThrowException(Exception::TypeError(
String::New("Bad parameter")));
}
in = LoadBIO(args[0]);
if (in == NULL) {
return ThrowException(Exception::Error(
String::New("Unable to load BIO")));
}
if (args.Length() >= 2) {
ASSERT_IS_BUFFER(args[1]);
int passlen = Buffer::Length(args[1]);
if (passlen < 0) {
BIO_free(in);
return ThrowException(Exception::TypeError(
String::New("Bad password")));
}
pass = new char[passlen + 1];
int pass_written = DecodeWrite(pass, passlen, args[1], BINARY);
assert(pass_written == passlen);
pass[passlen] = '\0';
}
if (d2i_PKCS12_bio(in, &p12) &&
PKCS12_parse(p12, pass, &pkey, &cert, &extraCerts) &&
SSL_CTX_use_certificate(sc->ctx_, cert) &&
SSL_CTX_use_PrivateKey(sc->ctx_, pkey))
{
// set extra certs
while (X509* x509 = sk_X509_pop(extraCerts)) {
if (!sc->ca_store_) {
sc->ca_store_ = X509_STORE_new();
SSL_CTX_set_cert_store(sc->ctx_, sc->ca_store_);
}
X509_STORE_add_cert(sc->ca_store_, x509);
SSL_CTX_add_client_CA(sc->ctx_, x509);
}
EVP_PKEY_free(pkey);
X509_free(cert);
sk_X509_free(extraCerts);
ret = true;
}
PKCS12_free(p12);
BIO_free(in);
delete[] pass;
if (!ret) {
unsigned long err = ERR_get_error();
const char* str = ERR_reason_error_string(err);
return ThrowException(Exception::Error(String::New(str)));
}
return True();
}
size_t ClientHelloParser::Write(const uint8_t* data, size_t len) {
HandleScope scope;
// Just accumulate data, everything will be pushed to BIO later
if (state_ == kPaused) return 0;
// Copy incoming data to the internal buffer
// (which has a size of the biggest possible TLS frame)
size_t available = sizeof(data_) - offset_;
size_t copied = len < available ? len : available;
memcpy(data_ + offset_, data, copied);
offset_ += copied;
// Vars for parsing hello
bool is_clienthello = false;
uint8_t session_size = -1;
uint8_t* session_id = NULL;
Local<Object> hello;
Handle<Value> argv[1];
switch (state_) {
case kWaiting:
// >= 5 bytes for header parsing
if (offset_ < 5) break;
if (data_[0] == kChangeCipherSpec || data_[0] == kAlert ||
data_[0] == kHandshake || data_[0] == kApplicationData) {
frame_len_ = (data_[3] << 8) + data_[4];
state_ = kTLSHeader;
body_offset_ = 5;
} else {
frame_len_ = (data_[0] << 8) + data_[1];
state_ = kSSLHeader;
if (*data_ & 0x40) {
// header with padding
body_offset_ = 3;
} else {
// without padding
body_offset_ = 2;
}
}
// Sanity check (too big frame, or too small)
if (frame_len_ >= sizeof(data_)) {
// Let OpenSSL handle it
Finish();
return copied;
}
case kTLSHeader:
case kSSLHeader:
// >= 5 + frame size bytes for frame parsing
if (offset_ < body_offset_ + frame_len_) break;
// Skip unsupported frames and gather some data from frame
// TODO: Check protocol version
if (data_[body_offset_] == kClientHello) {
is_clienthello = true;
uint8_t* body;
size_t session_offset;
if (state_ == kTLSHeader) {
// Skip frame header, hello header, protocol version and random data
session_offset = body_offset_ + 4 + 2 + 32;
if (session_offset + 1 < offset_) {
body = data_ + session_offset;
session_size = *body;
session_id = body + 1;
}
} else if (state_ == kSSLHeader) {
// Skip header, version
session_offset = body_offset_ + 3;
if (session_offset + 4 < offset_) {
body = data_ + session_offset;
int ciphers_size = (body[0] << 8) + body[1];
if (body + 4 + ciphers_size < data_ + offset_) {
session_size = (body[2] << 8) + body[3];
session_id = body + 4 + ciphers_size;
}
}
} else {
// Whoa? How did we get here?
abort();
}
// Check if we overflowed (do not reply with any private data)
if (session_id == NULL ||
session_size > 32 ||
session_id + session_size > data_ + offset_) {
Finish();
return copied;
}
// TODO: Parse other things?
}
// Not client hello - let OpenSSL handle it
if (!is_clienthello) {
Finish();
return copied;
}
// Parse frame, call javascript handler and
// move parser into the paused state
if (onclienthello_sym.IsEmpty()) {
onclienthello_sym = NODE_PSYMBOL("onclienthello");
}
if (sessionid_sym.IsEmpty()) {
sessionid_sym = NODE_PSYMBOL("sessionId");
}
state_ = kPaused;
hello = Object::New();
hello->Set(sessionid_sym,
Buffer::New(reinterpret_cast<char*>(session_id),
session_size)->handle_);
argv[0] = hello;
MakeCallback(conn_->handle_, onclienthello_sym, 1, argv);
break;
case kEnded:
default:
break;
}
return copied;
}
void ClientHelloParser::Finish() {
assert(state_ != kEnded);
state_ = kEnded;
// Write all accumulated data
int r = BIO_write(conn_->bio_read_, reinterpret_cast<char*>(data_), offset_);
conn_->HandleBIOError(conn_->bio_read_, "BIO_write", r);
conn_->SetShutdownFlags();
}
#ifdef SSL_PRINT_DEBUG
# define DEBUG_PRINT(...) fprintf (stderr, __VA_ARGS__)
#else
# define DEBUG_PRINT(...)
#endif
int Connection::HandleBIOError(BIO *bio, const char* func, int rv) {
if (rv >= 0) return rv;
int retry = BIO_should_retry(bio);
(void) retry; // unused if !defined(SSL_PRINT_DEBUG)
if (BIO_should_write(bio)) {
DEBUG_PRINT("[%p] BIO: %s want write. should retry %d\n", ssl_, func, retry);
return 0;
} else if (BIO_should_read(bio)) {
DEBUG_PRINT("[%p] BIO: %s want read. should retry %d\n", ssl_, func, retry);
return 0;
} else {
static char ssl_error_buf[512];
ERR_error_string_n(rv, ssl_error_buf, sizeof(ssl_error_buf));
HandleScope scope;
Local<Value> e = Exception::Error(String::New(ssl_error_buf));
handle_->Set(String::New("error"), e);
DEBUG_PRINT("[%p] BIO: %s failed: (%d) %s\n", ssl_, func, rv, ssl_error_buf);
return rv;
}
return 0;
}
int Connection::HandleSSLError(const char* func, int rv, ZeroStatus zs) {
// Forcibly clear OpenSSL's error stack on return. This stops stale errors
// from popping up later in the lifecycle of the SSL connection where they
// would cause spurious failures. It's a rather blunt method, though.
// ERR_clear_error() isn't necessarily cheap either.
struct ClearErrorOnReturn {
~ClearErrorOnReturn() { ERR_clear_error(); }
};
ClearErrorOnReturn clear_error_on_return;
(void) &clear_error_on_return; // Silence unused variable warning.
if (rv > 0) return rv;
if ((rv == 0) && (zs == kZeroIsNotAnError)) return rv;
int err = SSL_get_error(ssl_, rv);
if (err == SSL_ERROR_NONE) {
return 0;
} else if (err == SSL_ERROR_WANT_WRITE) {
DEBUG_PRINT("[%p] SSL: %s want write\n", ssl_, func);
return 0;
} else if (err == SSL_ERROR_WANT_READ) {
DEBUG_PRINT("[%p] SSL: %s want read\n", ssl_, func);
return 0;
} else if (err == SSL_ERROR_ZERO_RETURN) {
handle_->Set(String::New("error"),
Exception::Error(String::New("ZERO_RETURN")));
return rv;
} else {
HandleScope scope;
BUF_MEM* mem;
BIO *bio;
assert(err == SSL_ERROR_SSL || err == SSL_ERROR_SYSCALL);
// XXX We need to drain the error queue for this thread or else OpenSSL
// has the possibility of blocking connections? This problem is not well
// understood. And we should be somehow propagating these errors up
// into JavaScript. There is no test which demonstrates this problem.
// https://github.com/joyent/node/issues/1719
if ((bio = BIO_new(BIO_s_mem()))) {
ERR_print_errors(bio);
BIO_get_mem_ptr(bio, &mem);
Local<Value> e = Exception::Error(String::New(mem->data, mem->length));
handle_->Set(String::New("error"), e);
BIO_free(bio);
}
return rv;
}
return 0;
}
void Connection::ClearError() {
#ifndef NDEBUG
HandleScope scope;
// We should clear the error in JS-land
assert(handle_->Get(String::New("error"))->BooleanValue() == false);
#endif // NDEBUG
}
void Connection::SetShutdownFlags() {
HandleScope scope;
int flags = SSL_get_shutdown(ssl_);
if (flags & SSL_SENT_SHUTDOWN) {
handle_->Set(String::New("sentShutdown"), True());
}
if (flags & SSL_RECEIVED_SHUTDOWN) {
handle_->Set(String::New("receivedShutdown"), True());
}
}
void Connection::Initialize(Handle<Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(Connection::New);
t->InstanceTemplate()->SetInternalFieldCount(1);
t->SetClassName(String::NewSymbol("Connection"));
NODE_SET_PROTOTYPE_METHOD(t, "encIn", Connection::EncIn);
NODE_SET_PROTOTYPE_METHOD(t, "clearOut", Connection::ClearOut);
NODE_SET_PROTOTYPE_METHOD(t, "clearIn", Connection::ClearIn);
NODE_SET_PROTOTYPE_METHOD(t, "encOut", Connection::EncOut);
NODE_SET_PROTOTYPE_METHOD(t, "clearPending", Connection::ClearPending);
NODE_SET_PROTOTYPE_METHOD(t, "encPending", Connection::EncPending);
NODE_SET_PROTOTYPE_METHOD(t, "getPeerCertificate", Connection::GetPeerCertificate);
NODE_SET_PROTOTYPE_METHOD(t, "getSession", Connection::GetSession);
NODE_SET_PROTOTYPE_METHOD(t, "setSession", Connection::SetSession);
NODE_SET_PROTOTYPE_METHOD(t, "loadSession", Connection::LoadSession);
NODE_SET_PROTOTYPE_METHOD(t, "isSessionReused", Connection::IsSessionReused);
NODE_SET_PROTOTYPE_METHOD(t, "isInitFinished", Connection::IsInitFinished);
NODE_SET_PROTOTYPE_METHOD(t, "verifyError", Connection::VerifyError);
NODE_SET_PROTOTYPE_METHOD(t, "getCurrentCipher", Connection::GetCurrentCipher);
NODE_SET_PROTOTYPE_METHOD(t, "start", Connection::Start);
NODE_SET_PROTOTYPE_METHOD(t, "shutdown", Connection::Shutdown);
NODE_SET_PROTOTYPE_METHOD(t, "receivedShutdown", Connection::ReceivedShutdown);
NODE_SET_PROTOTYPE_METHOD(t, "close", Connection::Close);
#ifdef OPENSSL_NPN_NEGOTIATED
NODE_SET_PROTOTYPE_METHOD(t, "getNegotiatedProtocol", Connection::GetNegotiatedProto);
NODE_SET_PROTOTYPE_METHOD(t, "setNPNProtocols", Connection::SetNPNProtocols);
#endif
#ifdef SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
NODE_SET_PROTOTYPE_METHOD(t, "getServername", Connection::GetServername);
NODE_SET_PROTOTYPE_METHOD(t, "setSNICallback", Connection::SetSNICallback);
#endif
target->Set(String::NewSymbol("Connection"), t->GetFunction());
}
static int VerifyCallback(int preverify_ok, X509_STORE_CTX *ctx) {
// Quoting SSL_set_verify(3ssl):
//
// The VerifyCallback function is used to control the behaviour when
// the SSL_VERIFY_PEER flag is set. It must be supplied by the
// application and receives two arguments: preverify_ok indicates,
// whether the verification of the certificate in question was passed
// (preverify_ok=1) or not (preverify_ok=0). x509_ctx is a pointer to
// the complete context used for the certificate chain verification.
//
// The certificate chain is checked starting with the deepest nesting
// level (the root CA certificate) and worked upward to the peer's
// certificate. At each level signatures and issuer attributes are
// checked. Whenever a verification error is found, the error number is
// stored in x509_ctx and VerifyCallback is called with preverify_ok=0.
// By applying X509_CTX_store_* functions VerifyCallback can locate the
// certificate in question and perform additional steps (see EXAMPLES).
// If no error is found for a certificate, VerifyCallback is called
// with preverify_ok=1 before advancing to the next level.
//
// The return value of VerifyCallback controls the strategy of the
// further verification process. If VerifyCallback returns 0, the
// verification process is immediately stopped with "verification
// failed" state. If SSL_VERIFY_PEER is set, a verification failure
// alert is sent to the peer and the TLS/SSL handshake is terminated. If
// VerifyCallback returns 1, the verification process is continued. If
// VerifyCallback always returns 1, the TLS/SSL handshake will not be
// terminated with respect to verification failures and the connection
// will be established. The calling process can however retrieve the
// error code of the last verification error using
// SSL_get_verify_result(3) or by maintaining its own error storage
// managed by VerifyCallback.
//
// If no VerifyCallback is specified, the default callback will be
// used. Its return value is identical to preverify_ok, so that any
// verification failure will lead to a termination of the TLS/SSL
// handshake with an alert message, if SSL_VERIFY_PEER is set.
//
// Since we cannot perform I/O quickly enough in this callback, we ignore
// all preverify_ok errors and let the handshake continue. It is
// imparative that the user use Connection::VerifyError after the
// 'secure' callback has been made.
return 1;
}
#ifdef OPENSSL_NPN_NEGOTIATED
int Connection::AdvertiseNextProtoCallback_(SSL *s,
const unsigned char** data,
unsigned int *len,
void *arg) {
Connection *p = static_cast<Connection*>(SSL_get_app_data(s));
if (p->npnProtos_.IsEmpty()) {
// No initialization - no NPN protocols
*data = reinterpret_cast<const unsigned char*>("");
*len = 0;
} else {
*data = reinterpret_cast<const unsigned char*>(Buffer::Data(p->npnProtos_));
*len = Buffer::Length(p->npnProtos_);
}
return SSL_TLSEXT_ERR_OK;
}
int Connection::SelectNextProtoCallback_(SSL *s,
unsigned char** out, unsigned char* outlen,
const unsigned char* in,
unsigned int inlen, void *arg) {
Connection *p = static_cast<Connection*> SSL_get_app_data(s);
// Release old protocol handler if present
if (!p->selectedNPNProto_.IsEmpty()) {
p->selectedNPNProto_.Dispose();
}
if (p->npnProtos_.IsEmpty()) {
// We should at least select one protocol
// If server is using NPN
*out = reinterpret_cast<unsigned char*>(const_cast<char*>("http/1.1"));
*outlen = 8;
// set status unsupported
p->selectedNPNProto_ = Persistent<Value>::New(False());
return SSL_TLSEXT_ERR_OK;
}
const unsigned char* npnProtos =
reinterpret_cast<const unsigned char*>(Buffer::Data(p->npnProtos_));
int status = SSL_select_next_proto(out, outlen, in, inlen, npnProtos,
Buffer::Length(p->npnProtos_));
switch (status) {
case OPENSSL_NPN_UNSUPPORTED:
p->selectedNPNProto_ = Persistent<Value>::New(Null());
break;
case OPENSSL_NPN_NEGOTIATED:
p->selectedNPNProto_ = Persistent<Value>::New(String::New(
reinterpret_cast<const char*>(*out), *outlen
));
break;
case OPENSSL_NPN_NO_OVERLAP:
p->selectedNPNProto_ = Persistent<Value>::New(False());
break;
default:
break;
}
return SSL_TLSEXT_ERR_OK;
}
#endif
#ifdef SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
int Connection::SelectSNIContextCallback_(SSL *s, int *ad, void* arg) {
HandleScope scope;
Connection *p = static_cast<Connection*> SSL_get_app_data(s);
const char* servername = SSL_get_servername(s, TLSEXT_NAMETYPE_host_name);
if (servername) {
if (!p->servername_.IsEmpty()) {
p->servername_.Dispose();
}
p->servername_ = Persistent<String>::New(String::New(servername));
// Call the SNI callback and use its return value as context
if (!p->sniObject_.IsEmpty()) {
if (!p->sniContext_.IsEmpty()) {
p->sniContext_.Dispose();
}
// Get callback init args
Local<Value> argv[1] = {*p->servername_};
// Call it
Local<Value> ret = Local<Value>::New(MakeCallback(p->sniObject_,
"onselect",
ARRAY_SIZE(argv),
argv));
// If ret is SecureContext
if (secure_context_constructor->HasInstance(ret)) {
p->sniContext_ = Persistent<Value>::New(ret);
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(
Local<Object>::Cast(ret));
SSL_set_SSL_CTX(s, sc->ctx_);
} else {
return SSL_TLSEXT_ERR_NOACK;
}
}
}
return SSL_TLSEXT_ERR_OK;
}
#endif
Handle<Value> Connection::New(const Arguments& args) {
HandleScope scope;
Connection *p = new Connection();
p->Wrap(args.Holder());
if (args.Length() < 1 || !args[0]->IsObject()) {
return ThrowException(Exception::Error(String::New(
"First argument must be a crypto module Credentials")));
}
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args[0]->ToObject());
bool is_server = args[1]->BooleanValue();
p->ssl_ = SSL_new(sc->ctx_);
p->bio_read_ = BIO_new(BIO_s_mem());
p->bio_write_ = BIO_new(BIO_s_mem());
SSL_set_app_data(p->ssl_, p);
if (is_server) SSL_set_info_callback(p->ssl_, SSLInfoCallback);
#ifdef OPENSSL_NPN_NEGOTIATED
if (is_server) {
// Server should advertise NPN protocols
SSL_CTX_set_next_protos_advertised_cb(sc->ctx_,
AdvertiseNextProtoCallback_,
NULL);
} else {
// Client should select protocol from advertised
// If server supports NPN
SSL_CTX_set_next_proto_select_cb(sc->ctx_,
SelectNextProtoCallback_,
NULL);
}
#endif
#ifdef SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
if (is_server) {
SSL_CTX_set_tlsext_servername_callback(sc->ctx_, SelectSNIContextCallback_);
} else {
String::Utf8Value servername(args[2]);
SSL_set_tlsext_host_name(p->ssl_, *servername);
}
#endif
SSL_set_bio(p->ssl_, p->bio_read_, p->bio_write_);
#ifdef SSL_MODE_RELEASE_BUFFERS
long mode = SSL_get_mode(p->ssl_);
SSL_set_mode(p->ssl_, mode | SSL_MODE_RELEASE_BUFFERS);
#endif
int verify_mode;
if (is_server) {
bool request_cert = args[2]->BooleanValue();
if (!request_cert) {
// Note reject_unauthorized ignored.
verify_mode = SSL_VERIFY_NONE;
} else {
bool reject_unauthorized = args[3]->BooleanValue();
verify_mode = SSL_VERIFY_PEER;
if (reject_unauthorized) verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
}
} else {
// Note request_cert and reject_unauthorized are ignored for clients.
verify_mode = SSL_VERIFY_NONE;
}
// Always allow a connection. We'll reject in javascript.
SSL_set_verify(p->ssl_, verify_mode, VerifyCallback);
if ((p->is_server_ = is_server)) {
SSL_set_accept_state(p->ssl_);
} else {
SSL_set_connect_state(p->ssl_);
}
return args.This();
}
void Connection::SSLInfoCallback(const SSL *ssl_, int where, int ret) {
// Be compatible with older versions of OpenSSL. SSL_get_app_data() wants
// a non-const SSL* in OpenSSL <= 0.9.7e.
SSL* ssl = const_cast<SSL*>(ssl_);
if (where & SSL_CB_HANDSHAKE_START) {
HandleScope scope;
Connection* c = static_cast<Connection*>(SSL_get_app_data(ssl));
if (onhandshakestart_sym.IsEmpty()) {
onhandshakestart_sym = NODE_PSYMBOL("onhandshakestart");
}
MakeCallback(c->handle_, onhandshakestart_sym, 0, NULL);
}
if (where & SSL_CB_HANDSHAKE_DONE) {
HandleScope scope;
Connection* c = static_cast<Connection*>(SSL_get_app_data(ssl));
if (onhandshakedone_sym.IsEmpty()) {
onhandshakedone_sym = NODE_PSYMBOL("onhandshakedone");
}
MakeCallback(c->handle_, onhandshakedone_sym, 0, NULL);
}
}
Handle<Value> Connection::EncIn(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (args.Length() < 3) {
return ThrowException(Exception::TypeError(
String::New("Takes 3 parameters")));
}
if (!Buffer::HasInstance(args[0])) {
return ThrowException(Exception::TypeError(
String::New("Second argument should be a buffer")));
}
char* buffer_data = Buffer::Data(args[0]);
size_t buffer_length = Buffer::Length(args[0]);
size_t off = args[1]->Int32Value();
size_t len = args[2]->Int32Value();
if (off + len > buffer_length) {
return ThrowException(Exception::Error(
String::New("off + len > buffer.length")));
}
int bytes_written;
char* data = buffer_data + off;
if (ss->is_server_ && !ss->hello_parser_.ended()) {
bytes_written = ss->hello_parser_.Write(reinterpret_cast<uint8_t*>(data),
len);
} else {
bytes_written = BIO_write(ss->bio_read_, data, len);
ss->HandleBIOError(ss->bio_read_, "BIO_write", bytes_written);
ss->SetShutdownFlags();
}
return scope.Close(Integer::New(bytes_written));
}
Handle<Value> Connection::ClearOut(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (args.Length() < 3) {
return ThrowException(Exception::TypeError(
String::New("Takes 3 parameters")));
}
if (!Buffer::HasInstance(args[0])) {
return ThrowException(Exception::TypeError(
String::New("Second argument should be a buffer")));
}
char* buffer_data = Buffer::Data(args[0]);
size_t buffer_length = Buffer::Length(args[0]);
size_t off = args[1]->Int32Value();
size_t len = args[2]->Int32Value();
if (off + len > buffer_length) {
return ThrowException(Exception::Error(
String::New("off + len > buffer.length")));
}
if (!SSL_is_init_finished(ss->ssl_)) {
int rv;
if (ss->is_server_) {
rv = SSL_accept(ss->ssl_);
ss->HandleSSLError("SSL_accept:ClearOut", rv, kZeroIsAnError);
} else {
rv = SSL_connect(ss->ssl_);
ss->HandleSSLError("SSL_connect:ClearOut", rv, kZeroIsAnError);
}
if (rv < 0) return scope.Close(Integer::New(rv));
}
int bytes_read = SSL_read(ss->ssl_, buffer_data + off, len);
ss->HandleSSLError("SSL_read:ClearOut", bytes_read, kZeroIsNotAnError);
ss->SetShutdownFlags();
return scope.Close(Integer::New(bytes_read));
}
Handle<Value> Connection::ClearPending(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
int bytes_pending = BIO_pending(ss->bio_read_);
return scope.Close(Integer::New(bytes_pending));
}
Handle<Value> Connection::EncPending(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
int bytes_pending = BIO_pending(ss->bio_write_);
return scope.Close(Integer::New(bytes_pending));
}
Handle<Value> Connection::EncOut(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (args.Length() < 3) {
return ThrowException(Exception::TypeError(
String::New("Takes 3 parameters")));
}
if (!Buffer::HasInstance(args[0])) {
return ThrowException(Exception::TypeError(
String::New("Second argument should be a buffer")));
}
char* buffer_data = Buffer::Data(args[0]);
size_t buffer_length = Buffer::Length(args[0]);
size_t off = args[1]->Int32Value();
size_t len = args[2]->Int32Value();
if (off + len > buffer_length) {
return ThrowException(Exception::Error(
String::New("off + len > buffer.length")));
}
int bytes_read = BIO_read(ss->bio_write_, buffer_data + off, len);
ss->HandleBIOError(ss->bio_write_, "BIO_read:EncOut", bytes_read);
ss->SetShutdownFlags();
return scope.Close(Integer::New(bytes_read));
}
Handle<Value> Connection::ClearIn(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (args.Length() < 3) {
return ThrowException(Exception::TypeError(
String::New("Takes 3 parameters")));
}
if (!Buffer::HasInstance(args[0])) {
return ThrowException(Exception::TypeError(
String::New("Second argument should be a buffer")));
}
char* buffer_data = Buffer::Data(args[0]);
size_t buffer_length = Buffer::Length(args[0]);
size_t off = args[1]->Int32Value();
size_t len = args[2]->Int32Value();
if (off + len > buffer_length) {
return ThrowException(Exception::Error(
String::New("off + len > buffer.length")));
}
if (!SSL_is_init_finished(ss->ssl_)) {
int rv;
if (ss->is_server_) {
rv = SSL_accept(ss->ssl_);
ss->HandleSSLError("SSL_accept:ClearIn", rv, kZeroIsAnError);
} else {
rv = SSL_connect(ss->ssl_);
ss->HandleSSLError("SSL_connect:ClearIn", rv, kZeroIsAnError);
}
if (rv < 0) return scope.Close(Integer::New(rv));
}
int bytes_written = SSL_write(ss->ssl_, buffer_data + off, len);
ss->HandleSSLError("SSL_write:ClearIn",
bytes_written,
len == 0 ? kZeroIsNotAnError : kZeroIsAnError);
ss->SetShutdownFlags();
return scope.Close(Integer::New(bytes_written));
}
Handle<Value> Connection::GetPeerCertificate(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (ss->ssl_ == NULL) return Undefined();
Local<Object> info = Object::New();
X509* peer_cert = SSL_get_peer_certificate(ss->ssl_);
if (peer_cert != NULL) {
BIO* bio = BIO_new(BIO_s_mem());
BUF_MEM* mem;
if (X509_NAME_print_ex(bio, X509_get_subject_name(peer_cert), 0,
X509_NAME_FLAGS) > 0) {
BIO_get_mem_ptr(bio, &mem);
info->Set(subject_symbol, String::New(mem->data, mem->length));
}
(void) BIO_reset(bio);
if (X509_NAME_print_ex(bio, X509_get_issuer_name(peer_cert), 0,
X509_NAME_FLAGS) > 0) {
BIO_get_mem_ptr(bio, &mem);
info->Set(issuer_symbol, String::New(mem->data, mem->length));
}
(void) BIO_reset(bio);
int index = X509_get_ext_by_NID(peer_cert, NID_subject_alt_name, -1);
if (index >= 0) {
X509_EXTENSION* ext;
int rv;
ext = X509_get_ext(peer_cert, index);
assert(ext != NULL);
rv = X509V3_EXT_print(bio, ext, 0, 0);
assert(rv == 1);
BIO_get_mem_ptr(bio, &mem);
info->Set(subjectaltname_symbol, String::New(mem->data, mem->length));
(void) BIO_reset(bio);
}
EVP_PKEY *pkey = NULL;
RSA *rsa = NULL;
if( NULL != (pkey = X509_get_pubkey(peer_cert))
&& NULL != (rsa = EVP_PKEY_get1_RSA(pkey)) ) {
BN_print(bio, rsa->n);
BIO_get_mem_ptr(bio, &mem);
info->Set(modulus_symbol, String::New(mem->data, mem->length) );
(void) BIO_reset(bio);
BN_print(bio, rsa->e);
BIO_get_mem_ptr(bio, &mem);
info->Set(exponent_symbol, String::New(mem->data, mem->length) );
(void) BIO_reset(bio);
}
if (pkey != NULL) {
EVP_PKEY_free(pkey);
pkey = NULL;
}
if (rsa != NULL) {
RSA_free(rsa);
rsa = NULL;
}
ASN1_TIME_print(bio, X509_get_notBefore(peer_cert));
BIO_get_mem_ptr(bio, &mem);
info->Set(valid_from_symbol, String::New(mem->data, mem->length));
(void) BIO_reset(bio);
ASN1_TIME_print(bio, X509_get_notAfter(peer_cert));
BIO_get_mem_ptr(bio, &mem);
info->Set(valid_to_symbol, String::New(mem->data, mem->length));
BIO_free(bio);
unsigned int md_size, i;
unsigned char md[EVP_MAX_MD_SIZE];
if (X509_digest(peer_cert, EVP_sha1(), md, &md_size)) {
const char hex[] = "0123456789ABCDEF";
char fingerprint[EVP_MAX_MD_SIZE * 3];
for (i=0; i<md_size; i++) {
fingerprint[3*i] = hex[(md[i] & 0xf0) >> 4];
fingerprint[(3*i)+1] = hex[(md[i] & 0x0f)];
fingerprint[(3*i)+2] = ':';
}
if (md_size > 0) {
fingerprint[(3*(md_size-1))+2] = '\0';
}
else {
fingerprint[0] = '\0';
}
info->Set(fingerprint_symbol, String::New(fingerprint));
}
STACK_OF(ASN1_OBJECT) *eku = (STACK_OF(ASN1_OBJECT) *)X509_get_ext_d2i(
peer_cert, NID_ext_key_usage, NULL, NULL);
if (eku != NULL) {
Local<Array> ext_key_usage = Array::New();
char buf[256];
for (int i = 0; i < sk_ASN1_OBJECT_num(eku); i++) {
memset(buf, 0, sizeof(buf));
OBJ_obj2txt(buf, sizeof(buf) - 1, sk_ASN1_OBJECT_value(eku, i), 1);
ext_key_usage->Set(Integer::New(i), String::New(buf));
}
sk_ASN1_OBJECT_pop_free(eku, ASN1_OBJECT_free);
info->Set(ext_key_usage_symbol, ext_key_usage);
}
X509_free(peer_cert);
}
return scope.Close(info);
}
Handle<Value> Connection::GetSession(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (ss->ssl_ == NULL) return Undefined();
SSL_SESSION* sess = SSL_get_session(ss->ssl_);
if (!sess) return Undefined();
int slen = i2d_SSL_SESSION(sess, NULL);
assert(slen > 0);
if (slen > 0) {
unsigned char* sbuf = new unsigned char[slen];
unsigned char* p = sbuf;
i2d_SSL_SESSION(sess, &p);
Local<Value> s = Encode(sbuf, slen, BINARY);
delete[] sbuf;
return scope.Close(s);
}
return Null();
}
Handle<Value> Connection::SetSession(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (args.Length() < 1 ||
(!args[0]->IsString() && !Buffer::HasInstance(args[0]))) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
ASSERT_IS_BUFFER(args[0]);
ssize_t slen = Buffer::Length(args[0]);
if (slen < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
char* sbuf = new char[slen];
ssize_t wlen = DecodeWrite(sbuf, slen, args[0], BINARY);
assert(wlen == slen);
const unsigned char* p = reinterpret_cast<const unsigned char*>(sbuf);
SSL_SESSION* sess = d2i_SSL_SESSION(NULL, &p, wlen);
delete [] sbuf;
if (!sess)
return Undefined();
int r = SSL_set_session(ss->ssl_, sess);
SSL_SESSION_free(sess);
if (!r) {
Local<String> eStr = String::New("SSL_set_session error");
return ThrowException(Exception::Error(eStr));
}
return True();
}
Handle<Value> Connection::LoadSession(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (args.Length() >= 1 && Buffer::HasInstance(args[0])) {
ssize_t slen = Buffer::Length(args[0].As<Object>());
char* sbuf = Buffer::Data(args[0].As<Object>());
const unsigned char* p = reinterpret_cast<unsigned char*>(sbuf);
SSL_SESSION* sess = d2i_SSL_SESSION(NULL, &p, slen);
// Setup next session and move hello to the BIO buffer
if (ss->next_sess_ != NULL) {
SSL_SESSION_free(ss->next_sess_);
}
ss->next_sess_ = sess;
}
ss->hello_parser_.Finish();
return True();
}
Handle<Value> Connection::IsSessionReused(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (ss->ssl_ == NULL || SSL_session_reused(ss->ssl_) == false) {
return False();
}
return True();
}
Handle<Value> Connection::Start(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (!SSL_is_init_finished(ss->ssl_)) {
int rv;
if (ss->is_server_) {
rv = SSL_accept(ss->ssl_);
ss->HandleSSLError("SSL_accept:Start", rv, kZeroIsAnError);
} else {
rv = SSL_connect(ss->ssl_);
ss->HandleSSLError("SSL_connect:Start", rv, kZeroIsAnError);
}
return scope.Close(Integer::New(rv));
}
return scope.Close(Integer::New(0));
}
Handle<Value> Connection::Shutdown(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (ss->ssl_ == NULL) return False();
int rv = SSL_shutdown(ss->ssl_);
ss->HandleSSLError("SSL_shutdown", rv, kZeroIsNotAnError);
ss->SetShutdownFlags();
return scope.Close(Integer::New(rv));
}
Handle<Value> Connection::ReceivedShutdown(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (ss->ssl_ == NULL) return False();
int r = SSL_get_shutdown(ss->ssl_);
if (r & SSL_RECEIVED_SHUTDOWN) return True();
return False();
}
Handle<Value> Connection::IsInitFinished(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (ss->ssl_ == NULL || SSL_is_init_finished(ss->ssl_) == false) {
return False();
}
return True();
}
Handle<Value> Connection::VerifyError(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (ss->ssl_ == NULL) return Null();
// XXX Do this check in JS land?
X509* peer_cert = SSL_get_peer_certificate(ss->ssl_);
if (peer_cert == NULL) {
// We requested a certificate and they did not send us one.
// Definitely an error.
// XXX is this the right error message?
return scope.Close(Exception::Error(
String::New("UNABLE_TO_GET_ISSUER_CERT")));
}
X509_free(peer_cert);
long x509_verify_error = SSL_get_verify_result(ss->ssl_);
Local<String> s;
switch (x509_verify_error) {
case X509_V_OK:
return Null();
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
s = String::New("UNABLE_TO_GET_ISSUER_CERT");
break;
case X509_V_ERR_UNABLE_TO_GET_CRL:
s = String::New("UNABLE_TO_GET_CRL");
break;
case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
s = String::New("UNABLE_TO_DECRYPT_CERT_SIGNATURE");
break;
case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
s = String::New("UNABLE_TO_DECRYPT_CRL_SIGNATURE");
break;
case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
s = String::New("UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY");
break;
case X509_V_ERR_CERT_SIGNATURE_FAILURE:
s = String::New("CERT_SIGNATURE_FAILURE");
break;
case X509_V_ERR_CRL_SIGNATURE_FAILURE:
s = String::New("CRL_SIGNATURE_FAILURE");
break;
case X509_V_ERR_CERT_NOT_YET_VALID:
s = String::New("CERT_NOT_YET_VALID");
break;
case X509_V_ERR_CERT_HAS_EXPIRED:
s = String::New("CERT_HAS_EXPIRED");
break;
case X509_V_ERR_CRL_NOT_YET_VALID:
s = String::New("CRL_NOT_YET_VALID");
break;
case X509_V_ERR_CRL_HAS_EXPIRED:
s = String::New("CRL_HAS_EXPIRED");
break;
case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
s = String::New("ERROR_IN_CERT_NOT_BEFORE_FIELD");
break;
case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
s = String::New("ERROR_IN_CERT_NOT_AFTER_FIELD");
break;
case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
s = String::New("ERROR_IN_CRL_LAST_UPDATE_FIELD");
break;
case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
s = String::New("ERROR_IN_CRL_NEXT_UPDATE_FIELD");
break;
case X509_V_ERR_OUT_OF_MEM:
s = String::New("OUT_OF_MEM");
break;
case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
s = String::New("DEPTH_ZERO_SELF_SIGNED_CERT");
break;
case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
s = String::New("SELF_SIGNED_CERT_IN_CHAIN");
break;
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
s = String::New("UNABLE_TO_GET_ISSUER_CERT_LOCALLY");
break;
case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
s = String::New("UNABLE_TO_VERIFY_LEAF_SIGNATURE");
break;
case X509_V_ERR_CERT_CHAIN_TOO_LONG:
s = String::New("CERT_CHAIN_TOO_LONG");
break;
case X509_V_ERR_CERT_REVOKED:
s = String::New("CERT_REVOKED");
break;
case X509_V_ERR_INVALID_CA:
s = String::New("INVALID_CA");
break;
case X509_V_ERR_PATH_LENGTH_EXCEEDED:
s = String::New("PATH_LENGTH_EXCEEDED");
break;
case X509_V_ERR_INVALID_PURPOSE:
s = String::New("INVALID_PURPOSE");
break;
case X509_V_ERR_CERT_UNTRUSTED:
s = String::New("CERT_UNTRUSTED");
break;
case X509_V_ERR_CERT_REJECTED:
s = String::New("CERT_REJECTED");
break;
default:
s = String::New(X509_verify_cert_error_string(x509_verify_error));
break;
}
return scope.Close(Exception::Error(s));
}
Handle<Value> Connection::GetCurrentCipher(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
OPENSSL_CONST SSL_CIPHER *c;
if ( ss->ssl_ == NULL ) return Undefined();
c = SSL_get_current_cipher(ss->ssl_);
if ( c == NULL ) return Undefined();
Local<Object> info = Object::New();
const char* cipher_name = SSL_CIPHER_get_name(c);
info->Set(name_symbol, String::New(cipher_name));
const char* cipher_version = SSL_CIPHER_get_version(c);
info->Set(version_symbol, String::New(cipher_version));
return scope.Close(info);
}
Handle<Value> Connection::Close(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (ss->ssl_ != NULL) {
SSL_free(ss->ssl_);
ss->ssl_ = NULL;
}
return True();
}
#ifdef OPENSSL_NPN_NEGOTIATED
Handle<Value> Connection::GetNegotiatedProto(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (ss->is_server_) {
const unsigned char* npn_proto;
unsigned int npn_proto_len;
SSL_get0_next_proto_negotiated(ss->ssl_, &npn_proto, &npn_proto_len);
if (!npn_proto) {
return False();
}
return String::New((const char*) npn_proto, npn_proto_len);
} else {
return ss->selectedNPNProto_;
}
}
Handle<Value> Connection::SetNPNProtocols(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (args.Length() < 1 || !Buffer::HasInstance(args[0])) {
return ThrowException(Exception::Error(String::New(
"Must give a Buffer as first argument")));
}
// Release old handle
if (!ss->npnProtos_.IsEmpty()) {
ss->npnProtos_.Dispose();
}
ss->npnProtos_ = Persistent<Object>::New(args[0]->ToObject());
return True();
};
#endif
#ifdef SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
Handle<Value> Connection::GetServername(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (ss->is_server_ && !ss->servername_.IsEmpty()) {
return ss->servername_;
} else {
return False();
}
}
Handle<Value> Connection::SetSNICallback(const Arguments& args) {
HandleScope scope;
Connection *ss = Connection::Unwrap(args);
if (args.Length() < 1 || !args[0]->IsFunction()) {
return ThrowException(Exception::Error(String::New(
"Must give a Function as first argument")));
}
// Release old handle
if (!ss->sniObject_.IsEmpty()) {
ss->sniObject_.Dispose();
}
ss->sniObject_ = Persistent<Object>::New(Object::New());
ss->sniObject_->Set(String::New("onselect"), args[0]);
return True();
}
#endif
class Cipher : public ObjectWrap {
public:
static void Initialize (v8::Handle<v8::Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(t, "init", CipherInit);
NODE_SET_PROTOTYPE_METHOD(t, "initiv", CipherInitIv);
NODE_SET_PROTOTYPE_METHOD(t, "update", CipherUpdate);
NODE_SET_PROTOTYPE_METHOD(t, "setAutoPadding", SetAutoPadding);
NODE_SET_PROTOTYPE_METHOD(t, "final", CipherFinal);
target->Set(String::NewSymbol("Cipher"), t->GetFunction());
}
bool CipherInit(char* cipherType, char* key_buf, int key_buf_len) {
cipher = EVP_get_cipherbyname(cipherType);
if(!cipher) {
fprintf(stderr, "node-crypto : Unknown cipher %s\n", cipherType);
return false;
}
unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
int key_len = EVP_BytesToKey(cipher, EVP_md5(), NULL,
(unsigned char*) key_buf, key_buf_len, 1, key, iv);
EVP_CIPHER_CTX_init(&ctx);
EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, NULL, true);
if (!EVP_CIPHER_CTX_set_key_length(&ctx, key_len)) {
fprintf(stderr, "node-crypto : Invalid key length %d\n", key_len);
EVP_CIPHER_CTX_cleanup(&ctx);
return false;
}
EVP_CipherInit_ex(&ctx, NULL, NULL,
(unsigned char*)key,
(unsigned char*)iv, true);
initialised_ = true;
return true;
}
bool CipherInitIv(char* cipherType,
char* key,
int key_len,
char* iv,
int iv_len) {
cipher = EVP_get_cipherbyname(cipherType);
if(!cipher) {
fprintf(stderr, "node-crypto : Unknown cipher %s\n", cipherType);
return false;
}
/* OpenSSL versions up to 0.9.8l failed to return the correct
iv_length (0) for ECB ciphers */
if (EVP_CIPHER_iv_length(cipher) != iv_len &&
!(EVP_CIPHER_mode(cipher) == EVP_CIPH_ECB_MODE && iv_len == 0)) {
fprintf(stderr, "node-crypto : Invalid IV length %d\n", iv_len);
return false;
}
EVP_CIPHER_CTX_init(&ctx);
EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, NULL, true);
if (!EVP_CIPHER_CTX_set_key_length(&ctx, key_len)) {
fprintf(stderr, "node-crypto : Invalid key length %d\n", key_len);
EVP_CIPHER_CTX_cleanup(&ctx);
return false;
}
EVP_CipherInit_ex(&ctx, NULL, NULL,
(unsigned char*)key,
(unsigned char*)iv, true);
initialised_ = true;
return true;
}
int CipherUpdate(char* data, int len, unsigned char** out, int* out_len) {
if (!initialised_) return 0;
*out_len=len+EVP_CIPHER_CTX_block_size(&ctx);
*out= new unsigned char[*out_len];
return EVP_CipherUpdate(&ctx, *out, out_len, (unsigned char*)data, len);
}
int SetAutoPadding(bool auto_padding) {
if (!initialised_) return 0;
return EVP_CIPHER_CTX_set_padding(&ctx, auto_padding ? 1 : 0);
}
int CipherFinal(unsigned char** out, int *out_len) {
if (!initialised_) return 0;
*out = new unsigned char[EVP_CIPHER_CTX_block_size(&ctx)];
int r = EVP_CipherFinal_ex(&ctx,*out, out_len);
EVP_CIPHER_CTX_cleanup(&ctx);
initialised_ = false;
return r;
}
protected:
static Handle<Value> New(const Arguments& args) {
HandleScope scope;
Cipher *cipher = new Cipher();
cipher->Wrap(args.This());
return args.This();
}
static Handle<Value> CipherInit(const Arguments& args) {
HandleScope scope;
Cipher *cipher = ObjectWrap::Unwrap<Cipher>(args.This());
if (args.Length() <= 1
|| !args[0]->IsString()
|| !(args[1]->IsString() || Buffer::HasInstance(args[1])))
{
return ThrowException(Exception::Error(String::New(
"Must give cipher-type, key")));
}
ASSERT_IS_BUFFER(args[1]);
ssize_t key_buf_len = Buffer::Length(args[1]);
if (key_buf_len < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
char* key_buf = new char[key_buf_len];
ssize_t key_written = DecodeWrite(key_buf, key_buf_len, args[1], BINARY);
assert(key_written == key_buf_len);
String::Utf8Value cipherType(args[0]);
bool r = cipher->CipherInit(*cipherType, key_buf, key_buf_len);
delete [] key_buf;
if (!r) return ThrowCryptoError(ERR_get_error());
return args.This();
}
static Handle<Value> CipherInitIv(const Arguments& args) {
Cipher *cipher = ObjectWrap::Unwrap<Cipher>(args.This());
HandleScope scope;
if (args.Length() <= 2
|| !args[0]->IsString()
|| !(args[1]->IsString() || Buffer::HasInstance(args[1]))
|| !(args[2]->IsString() || Buffer::HasInstance(args[2])))
{
return ThrowException(Exception::Error(String::New(
"Must give cipher-type, key, and iv as argument")));
}
ASSERT_IS_BUFFER(args[1]);
ssize_t key_len = Buffer::Length(args[1]);
if (key_len < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
ASSERT_IS_BUFFER(args[2]);
ssize_t iv_len = Buffer::Length(args[2]);
if (iv_len < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
char* key_buf = new char[key_len];
ssize_t key_written = DecodeWrite(key_buf, key_len, args[1], BINARY);
assert(key_written == key_len);
char* iv_buf = new char[iv_len];
ssize_t iv_written = DecodeWrite(iv_buf, iv_len, args[2], BINARY);
assert(iv_written == iv_len);
String::Utf8Value cipherType(args[0]);
bool r = cipher->CipherInitIv(*cipherType, key_buf,key_len,iv_buf,iv_len);
delete [] key_buf;
delete [] iv_buf;
if (!r) return ThrowCryptoError(ERR_get_error());
return args.This();
}
static Handle<Value> CipherUpdate(const Arguments& args) {
Cipher *cipher = ObjectWrap::Unwrap<Cipher>(args.This());
HandleScope scope;
ASSERT_IS_BUFFER(args[0]);
unsigned char* out=0;
int out_len=0, r;
char* buffer_data = Buffer::Data(args[0]);
size_t buffer_length = Buffer::Length(args[0]);
r = cipher->CipherUpdate(buffer_data, buffer_length, &out, &out_len);
if (r == 0) {
delete [] out;
return ThrowCryptoTypeError(ERR_get_error());
}
Local<Value> outString;
outString = Encode(out, out_len, BUFFER);
if (out) delete [] out;
return scope.Close(outString);
}
static Handle<Value> SetAutoPadding(const Arguments& args) {
HandleScope scope;
Cipher *cipher = ObjectWrap::Unwrap<Cipher>(args.This());
cipher->SetAutoPadding(args.Length() < 1 || args[0]->BooleanValue());
return Undefined();
}
static Handle<Value> CipherFinal(const Arguments& args) {
Cipher *cipher = ObjectWrap::Unwrap<Cipher>(args.This());
HandleScope scope;
unsigned char* out_value = NULL;
int out_len = -1;
Local<Value> outString ;
int r = cipher->CipherFinal(&out_value, &out_len);
if (out_len <= 0 || r == 0) {
delete[] out_value;
out_value = NULL;
if (r == 0) return ThrowCryptoTypeError(ERR_get_error());
}
outString = Encode(out_value, out_len, BUFFER);
delete [] out_value;
return scope.Close(outString);
}
Cipher () : ObjectWrap ()
{
initialised_ = false;
}
~Cipher () {
if (initialised_) {
EVP_CIPHER_CTX_cleanup(&ctx);
}
}
private:
EVP_CIPHER_CTX ctx; /* coverity[member_decl] */
const EVP_CIPHER *cipher; /* coverity[member_decl] */
bool initialised_;
};
class Decipher : public ObjectWrap {
public:
static void
Initialize (v8::Handle<v8::Object> target)
{
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(t, "init", DecipherInit);
NODE_SET_PROTOTYPE_METHOD(t, "initiv", DecipherInitIv);
NODE_SET_PROTOTYPE_METHOD(t, "update", DecipherUpdate);
NODE_SET_PROTOTYPE_METHOD(t, "final", DecipherFinal);
NODE_SET_PROTOTYPE_METHOD(t, "finaltol", DecipherFinal); // remove someday
NODE_SET_PROTOTYPE_METHOD(t, "setAutoPadding", SetAutoPadding);
target->Set(String::NewSymbol("Decipher"), t->GetFunction());
}
bool DecipherInit(char* cipherType, char* key_buf, int key_buf_len) {
cipher_ = EVP_get_cipherbyname(cipherType);
if(!cipher_) {
fprintf(stderr, "node-crypto : Unknown cipher %s\n", cipherType);
return false;
}
unsigned char key[EVP_MAX_KEY_LENGTH],iv[EVP_MAX_IV_LENGTH];
int key_len = EVP_BytesToKey(cipher_,
EVP_md5(),
NULL,
(unsigned char*)(key_buf),
key_buf_len,
1,
key,
iv);
EVP_CIPHER_CTX_init(&ctx);
EVP_CipherInit_ex(&ctx, cipher_, NULL, NULL, NULL, false);
if (!EVP_CIPHER_CTX_set_key_length(&ctx, key_len)) {
fprintf(stderr, "node-crypto : Invalid key length %d\n", key_len);
EVP_CIPHER_CTX_cleanup(&ctx);
return false;
}
EVP_CipherInit_ex(&ctx, NULL, NULL,
(unsigned char*)key,
(unsigned char*)iv, false);
initialised_ = true;
return true;
}
bool DecipherInitIv(char* cipherType,
char* key,
int key_len,
char* iv,
int iv_len) {
cipher_ = EVP_get_cipherbyname(cipherType);
if(!cipher_) {
fprintf(stderr, "node-crypto : Unknown cipher %s\n", cipherType);
return false;
}
/* OpenSSL versions up to 0.9.8l failed to return the correct
iv_length (0) for ECB ciphers */
if (EVP_CIPHER_iv_length(cipher_) != iv_len &&
!(EVP_CIPHER_mode(cipher_) == EVP_CIPH_ECB_MODE && iv_len == 0)) {
fprintf(stderr, "node-crypto : Invalid IV length %d\n", iv_len);
return false;
}
EVP_CIPHER_CTX_init(&ctx);
EVP_CipherInit_ex(&ctx, cipher_, NULL, NULL, NULL, false);
if (!EVP_CIPHER_CTX_set_key_length(&ctx, key_len)) {
fprintf(stderr, "node-crypto : Invalid key length %d\n", key_len);
EVP_CIPHER_CTX_cleanup(&ctx);
return false;
}
EVP_CipherInit_ex(&ctx, NULL, NULL,
(unsigned char*)key,
(unsigned char*)iv, false);
initialised_ = true;
return true;
}
int DecipherUpdate(char* data, int len, unsigned char** out, int* out_len) {
if (!initialised_) {
*out_len = 0;
*out = NULL;
return 0;
}
*out_len=len+EVP_CIPHER_CTX_block_size(&ctx);
*out= new unsigned char[*out_len];
return EVP_CipherUpdate(&ctx, *out, out_len, (unsigned char*)data, len);
}
int SetAutoPadding(bool auto_padding) {
if (!initialised_) return 0;
return EVP_CIPHER_CTX_set_padding(&ctx, auto_padding ? 1 : 0);
}
// coverity[alloc_arg]
int DecipherFinal(unsigned char** out, int *out_len) {
int r;
if (!initialised_) {
*out_len = 0;
*out = NULL;
return 0;
}
*out = new unsigned char[EVP_CIPHER_CTX_block_size(&ctx)];
r = EVP_CipherFinal_ex(&ctx,*out,out_len);
EVP_CIPHER_CTX_cleanup(&ctx);
initialised_ = false;
return r;
}
protected:
static Handle<Value> New (const Arguments& args) {
HandleScope scope;
Decipher *cipher = new Decipher();
cipher->Wrap(args.This());
return args.This();
}
static Handle<Value> DecipherInit(const Arguments& args) {
Decipher *cipher = ObjectWrap::Unwrap<Decipher>(args.This());
HandleScope scope;
if (args.Length() <= 1
|| !args[0]->IsString()
|| !(args[1]->IsString() || Buffer::HasInstance(args[1])))
{
return ThrowException(Exception::Error(String::New(
"Must give cipher-type, key as argument")));
}
ASSERT_IS_BUFFER(args[1]);
ssize_t key_len = Buffer::Length(args[1]);
if (key_len < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
char* key_buf = new char[key_len];
ssize_t key_written = DecodeWrite(key_buf, key_len, args[1], BINARY);
assert(key_written == key_len);
String::Utf8Value cipherType(args[0]);
bool r = cipher->DecipherInit(*cipherType, key_buf,key_len);
delete [] key_buf;
if (!r) {
return ThrowException(Exception::Error(String::New("DecipherInit error")));
}
return args.This();
}
static Handle<Value> DecipherInitIv(const Arguments& args) {
Decipher *cipher = ObjectWrap::Unwrap<Decipher>(args.This());
HandleScope scope;
if (args.Length() <= 2
|| !args[0]->IsString()
|| !(args[1]->IsString() || Buffer::HasInstance(args[1]))
|| !(args[2]->IsString() || Buffer::HasInstance(args[2])))
{
return ThrowException(Exception::Error(String::New(
"Must give cipher-type, key, and iv as argument")));
}
ASSERT_IS_BUFFER(args[1]);
ssize_t key_len = Buffer::Length(args[1]);
if (key_len < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
ASSERT_IS_BUFFER(args[2]);
ssize_t iv_len = Buffer::Length(args[2]);
if (iv_len < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
char* key_buf = new char[key_len];
ssize_t key_written = DecodeWrite(key_buf, key_len, args[1], BINARY);
assert(key_written == key_len);
char* iv_buf = new char[iv_len];
ssize_t iv_written = DecodeWrite(iv_buf, iv_len, args[2], BINARY);
assert(iv_written == iv_len);
String::Utf8Value cipherType(args[0]);
bool r = cipher->DecipherInitIv(*cipherType, key_buf,key_len,iv_buf,iv_len);
delete [] key_buf;
delete [] iv_buf;
if (!r) {
return ThrowException(Exception::Error(String::New("DecipherInitIv error")));
}
return args.This();
}
static Handle<Value> DecipherUpdate(const Arguments& args) {
HandleScope scope;
Decipher *cipher = ObjectWrap::Unwrap<Decipher>(args.This());
ASSERT_IS_BUFFER(args[0]);
ssize_t len;
char* buf;
// if alloc_buf then buf must be deleted later
bool alloc_buf = false;
char* buffer_data = Buffer::Data(args[0]);
size_t buffer_length = Buffer::Length(args[0]);
buf = buffer_data;
len = buffer_length;
unsigned char* out=0;
int out_len=0;
int r = cipher->DecipherUpdate(buf, len, &out, &out_len);
if (!r) {
delete [] out;
return ThrowCryptoTypeError(ERR_get_error());
}
Local<Value> outString;
outString = Encode(out, out_len, BUFFER);
if (out) delete [] out;
if (alloc_buf) delete [] buf;
return scope.Close(outString);
}
static Handle<Value> SetAutoPadding(const Arguments& args) {
HandleScope scope;
Decipher *cipher = ObjectWrap::Unwrap<Decipher>(args.This());
cipher->SetAutoPadding(args.Length() < 1 || args[0]->BooleanValue());
return Undefined();
}
static Handle<Value> DecipherFinal(const Arguments& args) {
HandleScope scope;
Decipher *cipher = ObjectWrap::Unwrap<Decipher>(args.This());
unsigned char* out_value = NULL;
int out_len = -1;
Local<Value> outString;
int r = cipher->DecipherFinal(&out_value, &out_len);
if (out_len <= 0 || r == 0) {
delete [] out_value; // allocated even if out_len == 0
out_value = NULL;
if (r == 0) return ThrowCryptoTypeError(ERR_get_error());
}
outString = Encode(out_value, out_len, BUFFER);
delete [] out_value;
return scope.Close(outString);
}
Decipher () : ObjectWrap () {
initialised_ = false;
}
~Decipher () {
if (initialised_) {
EVP_CIPHER_CTX_cleanup(&ctx);
}
}
private:
EVP_CIPHER_CTX ctx;
const EVP_CIPHER *cipher_;
bool initialised_;
};
class Hmac : public ObjectWrap {
public:
static void Initialize (v8::Handle<v8::Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(t, "init", HmacInit);
NODE_SET_PROTOTYPE_METHOD(t, "update", HmacUpdate);
NODE_SET_PROTOTYPE_METHOD(t, "digest", HmacDigest);
target->Set(String::NewSymbol("Hmac"), t->GetFunction());
}
bool HmacInit(char* hashType, char* key, int key_len) {
md = EVP_get_digestbyname(hashType);
if(!md) {
fprintf(stderr, "node-crypto : Unknown message digest %s\n", hashType);
return false;
}
HMAC_CTX_init(&ctx);
if (key_len == 0) {
HMAC_Init(&ctx, "", 0, md);
} else {
HMAC_Init(&ctx, key, key_len, md);
}
initialised_ = true;
return true;
}
int HmacUpdate(char* data, int len) {
if (!initialised_) return 0;
HMAC_Update(&ctx, (unsigned char*)data, len);
return 1;
}
int HmacDigest(unsigned char** md_value, unsigned int *md_len) {
if (!initialised_) return 0;
*md_value = new unsigned char[EVP_MAX_MD_SIZE];
HMAC_Final(&ctx, *md_value, md_len);
HMAC_CTX_cleanup(&ctx);
initialised_ = false;
return 1;
}
protected:
static Handle<Value> New (const Arguments& args) {
HandleScope scope;
Hmac *hmac = new Hmac();
hmac->Wrap(args.This());
return args.This();
}
static Handle<Value> HmacInit(const Arguments& args) {
Hmac *hmac = ObjectWrap::Unwrap<Hmac>(args.This());
HandleScope scope;
if (args.Length() == 0 || !args[0]->IsString()) {
return ThrowException(Exception::Error(String::New(
"Must give hashtype string as argument")));
}
ASSERT_IS_BUFFER(args[1]);
ssize_t len = Buffer::Length(args[1]);
if (len < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
String::Utf8Value hashType(args[0]);
bool r;
if( Buffer::HasInstance(args[1])) {
char* buffer_data = Buffer::Data(args[1]);
size_t buffer_length = Buffer::Length(args[1]);
r = hmac->HmacInit(*hashType, buffer_data, buffer_length);
} else {
char* buf = new char[len];
ssize_t written = DecodeWrite(buf, len, args[1], BINARY);
assert(written == len);
r = hmac->HmacInit(*hashType, buf, len);
delete [] buf;
}
if (!r) {
return ThrowException(Exception::Error(String::New("hmac error")));
}
return args.This();
}
static Handle<Value> HmacUpdate(const Arguments& args) {
Hmac *hmac = ObjectWrap::Unwrap<Hmac>(args.This());
HandleScope scope;
ASSERT_IS_BUFFER(args[0]);
int r;
char* buffer_data = Buffer::Data(args[0]);
size_t buffer_length = Buffer::Length(args[0]);
r = hmac->HmacUpdate(buffer_data, buffer_length);
if (!r) {
Local<Value> exception = Exception::TypeError(String::New("HmacUpdate fail"));
return ThrowException(exception);
}
return args.This();
}
static Handle<Value> HmacDigest(const Arguments& args) {
Hmac *hmac = ObjectWrap::Unwrap<Hmac>(args.This());
HandleScope scope;
unsigned char* md_value = NULL;
unsigned int md_len = 0;
Local<Value> outString;
int r = hmac->HmacDigest(&md_value, &md_len);
if (r == 0) {
md_value = NULL;
md_len = 0;
}
outString = Encode(md_value, md_len, BUFFER);
delete [] md_value;
return scope.Close(outString);
}
Hmac () : ObjectWrap () {
initialised_ = false;
}
~Hmac () {
if (initialised_) {
HMAC_CTX_cleanup(&ctx);
}
}
private:
HMAC_CTX ctx; /* coverity[member_decl] */
const EVP_MD *md; /* coverity[member_decl] */
bool initialised_;
};
class Hash : public ObjectWrap {
public:
static void Initialize (v8::Handle<v8::Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(t, "update", HashUpdate);
NODE_SET_PROTOTYPE_METHOD(t, "digest", HashDigest);
target->Set(String::NewSymbol("Hash"), t->GetFunction());
}
bool HashInit (const char* hashType) {
md = EVP_get_digestbyname(hashType);
if(!md) return false;
EVP_MD_CTX_init(&mdctx);
EVP_DigestInit_ex(&mdctx, md, NULL);
initialised_ = true;
return true;
}
int HashUpdate(char* data, int len) {
if (!initialised_) return 0;
EVP_DigestUpdate(&mdctx, data, len);
return 1;
}
protected:
static Handle<Value> New (const Arguments& args) {
HandleScope scope;
if (args.Length() == 0 || !args[0]->IsString()) {
return ThrowException(Exception::Error(String::New(
"Must give hashtype string as argument")));
}
String::Utf8Value hashType(args[0]);
Hash *hash = new Hash();
if (!hash->HashInit(*hashType)) {
delete hash;
return ThrowException(Exception::Error(String::New(
"Digest method not supported")));
}
hash->Wrap(args.This());
return args.This();
}
static Handle<Value> HashUpdate(const Arguments& args) {
HandleScope scope;
Hash *hash = ObjectWrap::Unwrap<Hash>(args.This());
ASSERT_IS_BUFFER(args[0]);
int r;
char* buffer_data = Buffer::Data(args[0]);
size_t buffer_length = Buffer::Length(args[0]);
r = hash->HashUpdate(buffer_data, buffer_length);
if (!r) {
Local<Value> exception = Exception::TypeError(String::New("HashUpdate fail"));
return ThrowException(exception);
}
return args.This();
}
static Handle<Value> HashDigest(const Arguments& args) {
HandleScope scope;
Hash *hash = ObjectWrap::Unwrap<Hash>(args.This());
if (!hash->initialised_) {
return ThrowException(Exception::Error(String::New("Not initialized")));
}
unsigned char md_value[EVP_MAX_MD_SIZE];
unsigned int md_len;
EVP_DigestFinal_ex(&hash->mdctx, md_value, &md_len);
EVP_MD_CTX_cleanup(&hash->mdctx);
hash->initialised_ = false;
Local<Value> outString;
outString = Encode(md_value, md_len, BUFFER);
return scope.Close(outString);
}
Hash () : ObjectWrap () {
initialised_ = false;
}
~Hash () {
if (initialised_) {
EVP_MD_CTX_cleanup(&mdctx);
}
}
private:
EVP_MD_CTX mdctx; /* coverity[member_decl] */
const EVP_MD *md; /* coverity[member_decl] */
bool initialised_;
};
class Sign : public ObjectWrap {
public:
static void
Initialize (v8::Handle<v8::Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(t, "init", SignInit);
NODE_SET_PROTOTYPE_METHOD(t, "update", SignUpdate);
NODE_SET_PROTOTYPE_METHOD(t, "sign", SignFinal);
target->Set(String::NewSymbol("Sign"), t->GetFunction());
}
bool SignInit (const char* signType) {
md = EVP_get_digestbyname(signType);
if(!md) {
printf("Unknown message digest %s\n", signType);
return false;
}
EVP_MD_CTX_init(&mdctx);
EVP_SignInit_ex(&mdctx, md, NULL);
initialised_ = true;
return true;
}
int SignUpdate(char* data, int len) {
if (!initialised_) return 0;
EVP_SignUpdate(&mdctx, data, len);
return 1;
}
int SignFinal(unsigned char** md_value,
unsigned int *md_len,
char* key_pem,
int key_pemLen) {
if (!initialised_) return 0;
BIO *bp = NULL;
EVP_PKEY* pkey;
bp = BIO_new(BIO_s_mem());
if(!BIO_write(bp, key_pem, key_pemLen)) return 0;
pkey = PEM_read_bio_PrivateKey( bp, NULL, NULL, NULL );
if (pkey == NULL) return 0;
EVP_SignFinal(&mdctx, *md_value, md_len, pkey);
EVP_MD_CTX_cleanup(&mdctx);
initialised_ = false;
EVP_PKEY_free(pkey);
BIO_free(bp);
return 1;
}
protected:
static Handle<Value> New (const Arguments& args) {
HandleScope scope;
Sign *sign = new Sign();
sign->Wrap(args.This());
return args.This();
}
static Handle<Value> SignInit(const Arguments& args) {
HandleScope scope;
Sign *sign = ObjectWrap::Unwrap<Sign>(args.This());
if (args.Length() == 0 || !args[0]->IsString()) {
return ThrowException(Exception::Error(String::New(
"Must give signtype string as argument")));
}
String::Utf8Value signType(args[0]);
bool r = sign->SignInit(*signType);
if (!r) {
return ThrowException(Exception::Error(String::New("SignInit error")));
}
return args.This();
}
static Handle<Value> SignUpdate(const Arguments& args) {
Sign *sign = ObjectWrap::Unwrap<Sign>(args.This());
HandleScope scope;
ASSERT_IS_BUFFER(args[0]);
int r;
char* buffer_data = Buffer::Data(args[0]);
size_t buffer_length = Buffer::Length(args[0]);
r = sign->SignUpdate(buffer_data, buffer_length);
if (!r) {
Local<Value> exception = Exception::TypeError(String::New("SignUpdate fail"));
return ThrowException(exception);
}
return args.This();
}
static Handle<Value> SignFinal(const Arguments& args) {
Sign *sign = ObjectWrap::Unwrap<Sign>(args.This());
HandleScope scope;
unsigned char* md_value;
unsigned int md_len;
Local<Value> outString;
md_len = 8192; // Maximum key size is 8192 bits
md_value = new unsigned char[md_len];
ASSERT_IS_BUFFER(args[0]);
ssize_t len = Buffer::Length(args[0]);
char* buf = new char[len];
ssize_t written = DecodeWrite(buf, len, args[0], BUFFER);
assert(written == len);
int r = sign->SignFinal(&md_value, &md_len, buf, len);
if (r == 0) {
md_value = NULL;
md_len = r;
}
delete [] buf;
outString = Encode(md_value, md_len, BUFFER);
delete [] md_value;
return scope.Close(outString);
}
Sign () : ObjectWrap () {
initialised_ = false;
}
~Sign () {
if (initialised_) {
EVP_MD_CTX_cleanup(&mdctx);
}
}
private:
EVP_MD_CTX mdctx; /* coverity[member_decl] */
const EVP_MD *md; /* coverity[member_decl] */
bool initialised_;
};
class Verify : public ObjectWrap {
public:
static void Initialize (v8::Handle<v8::Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(t, "init", VerifyInit);
NODE_SET_PROTOTYPE_METHOD(t, "update", VerifyUpdate);
NODE_SET_PROTOTYPE_METHOD(t, "verify", VerifyFinal);
target->Set(String::NewSymbol("Verify"), t->GetFunction());
}
bool VerifyInit (const char* verifyType) {
md = EVP_get_digestbyname(verifyType);
if(!md) {
fprintf(stderr, "node-crypto : Unknown message digest %s\n", verifyType);
return false;
}
EVP_MD_CTX_init(&mdctx);
EVP_VerifyInit_ex(&mdctx, md, NULL);
initialised_ = true;
return true;
}
int VerifyUpdate(char* data, int len) {
if (!initialised_) return 0;
EVP_VerifyUpdate(&mdctx, data, len);
return 1;
}
int VerifyFinal(char* key_pem, int key_pemLen, unsigned char* sig, int siglen) {
if (!initialised_) return 0;
EVP_PKEY* pkey = NULL;
BIO *bp = NULL;
X509 *x509 = NULL;
int r = 0;
bp = BIO_new(BIO_s_mem());
if (bp == NULL) {
ERR_print_errors_fp(stderr);
return 0;
}
if(!BIO_write(bp, key_pem, key_pemLen)) {
ERR_print_errors_fp(stderr);
return 0;
}
// Check if this is a PKCS#8 or RSA public key before trying as X.509.
// Split this out into a separate function once we have more than one
// consumer of public keys.
if (strncmp(key_pem, PUBLIC_KEY_PFX, PUBLIC_KEY_PFX_LEN) == 0) {
pkey = PEM_read_bio_PUBKEY(bp, NULL, NULL, NULL);
if (pkey == NULL) {
ERR_print_errors_fp(stderr);
return 0;
}
} else if (strncmp(key_pem, PUBRSA_KEY_PFX, PUBRSA_KEY_PFX_LEN) == 0) {
RSA* rsa = PEM_read_bio_RSAPublicKey(bp, NULL, NULL, NULL);
if (rsa) {
pkey = EVP_PKEY_new();
if (pkey) EVP_PKEY_set1_RSA(pkey, rsa);
RSA_free(rsa);
}
if (pkey == NULL) {
ERR_print_errors_fp(stderr);
return 0;
}
} else {
// X.509 fallback
x509 = PEM_read_bio_X509(bp, NULL, NULL, NULL);
if (x509 == NULL) {
ERR_print_errors_fp(stderr);
return 0;
}
pkey = X509_get_pubkey(x509);
if (pkey == NULL) {
ERR_print_errors_fp(stderr);
return 0;
}
}
r = EVP_VerifyFinal(&mdctx, sig, siglen, pkey);
if(pkey != NULL)
EVP_PKEY_free (pkey);
if (x509 != NULL)
X509_free(x509);
if (bp != NULL)
BIO_free(bp);
EVP_MD_CTX_cleanup(&mdctx);
initialised_ = false;
return r;
}
protected:
static Handle<Value> New (const Arguments& args) {
HandleScope scope;
Verify *verify = new Verify();
verify->Wrap(args.This());
return args.This();
}
static Handle<Value> VerifyInit(const Arguments& args) {
Verify *verify = ObjectWrap::Unwrap<Verify>(args.This());
HandleScope scope;
if (args.Length() == 0 || !args[0]->IsString()) {
return ThrowException(Exception::Error(String::New(
"Must give verifytype string as argument")));
}
String::Utf8Value verifyType(args[0]);
bool r = verify->VerifyInit(*verifyType);
if (!r) {
return ThrowException(Exception::Error(String::New("VerifyInit error")));
}
return args.This();
}
static Handle<Value> VerifyUpdate(const Arguments& args) {
HandleScope scope;
Verify *verify = ObjectWrap::Unwrap<Verify>(args.This());
ASSERT_IS_BUFFER(args[0]);
int r;
char* buffer_data = Buffer::Data(args[0]);
size_t buffer_length = Buffer::Length(args[0]);
r = verify->VerifyUpdate(buffer_data, buffer_length);
if (!r) {
Local<Value> exception = Exception::TypeError(String::New("VerifyUpdate fail"));
return ThrowException(exception);
}
return args.This();
}
static Handle<Value> VerifyFinal(const Arguments& args) {
HandleScope scope;
Verify *verify = ObjectWrap::Unwrap<Verify>(args.This());
ASSERT_IS_BUFFER(args[0]);
ssize_t klen = Buffer::Length(args[0]);
if (klen < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
char* kbuf = new char[klen];
ssize_t kwritten = DecodeWrite(kbuf, klen, args[0], BINARY);
assert(kwritten == klen);
ASSERT_IS_BUFFER(args[1]);
ssize_t hlen = Buffer::Length(args[1]);
if (hlen < 0) {
delete [] kbuf;
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}
unsigned char* hbuf = new unsigned char[hlen];
ssize_t hwritten = DecodeWrite((char*)hbuf, hlen, args[1], BINARY);
assert(hwritten == hlen);
int r=-1;
r = verify->VerifyFinal(kbuf, klen, hbuf, hlen);
delete [] kbuf;
delete [] hbuf;
return Boolean::New(r && r != -1);
}
Verify () : ObjectWrap () {
initialised_ = false;
}
~Verify () {
if (initialised_) {
EVP_MD_CTX_cleanup(&mdctx);
}
}
private:
EVP_MD_CTX mdctx; /* coverity[member_decl] */
const EVP_MD *md; /* coverity[member_decl] */
bool initialised_;
};
class DiffieHellman : public ObjectWrap {
public:
static void Initialize(v8::Handle<v8::Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(t, "generateKeys", GenerateKeys);
NODE_SET_PROTOTYPE_METHOD(t, "computeSecret", ComputeSecret);
NODE_SET_PROTOTYPE_METHOD(t, "getPrime", GetPrime);
NODE_SET_PROTOTYPE_METHOD(t, "getGenerator", GetGenerator);
NODE_SET_PROTOTYPE_METHOD(t, "getPublicKey", GetPublicKey);
NODE_SET_PROTOTYPE_METHOD(t, "getPrivateKey", GetPrivateKey);
NODE_SET_PROTOTYPE_METHOD(t, "setPublicKey", SetPublicKey);
NODE_SET_PROTOTYPE_METHOD(t, "setPrivateKey", SetPrivateKey);
target->Set(String::NewSymbol("DiffieHellman"), t->GetFunction());
Local<FunctionTemplate> t2 = FunctionTemplate::New(DiffieHellmanGroup);
t2->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(t2, "generateKeys", GenerateKeys);
NODE_SET_PROTOTYPE_METHOD(t2, "computeSecret", ComputeSecret);
NODE_SET_PROTOTYPE_METHOD(t2, "getPrime", GetPrime);
NODE_SET_PROTOTYPE_METHOD(t2, "getGenerator", GetGenerator);
NODE_SET_PROTOTYPE_METHOD(t2, "getPublicKey", GetPublicKey);
NODE_SET_PROTOTYPE_METHOD(t2, "getPrivateKey", GetPrivateKey);
target->Set(String::NewSymbol("DiffieHellmanGroup"), t2->GetFunction());
}
bool Init(int primeLength) {
dh = DH_new();
DH_generate_parameters_ex(dh, primeLength, DH_GENERATOR_2, 0);
bool result = VerifyContext();
if (!result) return false;
initialised_ = true;
return true;
}
bool Init(unsigned char* p, int p_len) {
dh = DH_new();
dh->p = BN_bin2bn(p, p_len, 0);
dh->g = BN_new();
if (!BN_set_word(dh->g, 2)) return false;
bool result = VerifyContext();
if (!result) return false;
initialised_ = true;
return true;
}
bool Init(unsigned char* p, int p_len, unsigned char* g, int g_len) {
dh = DH_new();
dh->p = BN_bin2bn(p, p_len, 0);
dh->g = BN_bin2bn(g, g_len, 0);
initialised_ = true;
return true;
}
protected:
static Handle<Value> DiffieHellmanGroup(const Arguments& args) {
HandleScope scope;
DiffieHellman* diffieHellman = new DiffieHellman();
if (args.Length() != 1 || !args[0]->IsString()) {
return ThrowException(Exception::Error(
String::New("No group name given")));
}
String::Utf8Value group_name(args[0]);
modp_group* it = modp_groups;
while(it->name != NULL) {
if (!strcasecmp(*group_name, it->name))
break;
it++;
}
if (it->name != NULL) {
diffieHellman->Init(it->prime, it->prime_size,
it->gen, it->gen_size);
} else {
return ThrowException(Exception::Error(
String::New("Unknown group")));
}
diffieHellman->Wrap(args.This());
return args.This();
}
static Handle<Value> New(const Arguments& args) {
HandleScope scope;
DiffieHellman* diffieHellman = new DiffieHellman();
bool initialized = false;
if (args.Length() > 0) {
if (args[0]->IsInt32()) {
initialized = diffieHellman->Init(args[0]->Int32Value());
} else {
initialized = diffieHellman->Init(
reinterpret_cast<unsigned char*>(Buffer::Data(args[0])),
Buffer::Length(args[0]));
}
}
if (!initialized) {
return ThrowException(Exception::Error(
String::New("Initialization failed")));
}
diffieHellman->Wrap(args.This());
return args.This();
}
static Handle<Value> GenerateKeys(const Arguments& args) {
DiffieHellman* diffieHellman =
ObjectWrap::Unwrap<DiffieHellman>(args.This());
HandleScope scope;
if (!diffieHellman->initialised_) {
return ThrowException(Exception::Error(
String::New("Not initialized")));
}
if (!DH_generate_key(diffieHellman->dh)) {
return ThrowException(Exception::Error(
String::New("Key generation failed")));
}
Local<Value> outString;
int dataSize = BN_num_bytes(diffieHellman->dh->pub_key);
char* data = new char[dataSize];
BN_bn2bin(diffieHellman->dh->pub_key,
reinterpret_cast<unsigned char*>(data));
outString = Encode(data, dataSize, BUFFER);
delete[] data;
return scope.Close(outString);
}
static Handle<Value> GetPrime(const Arguments& args) {
DiffieHellman* diffieHellman =
ObjectWrap::Unwrap<DiffieHellman>(args.This());
HandleScope scope;
if (!diffieHellman->initialised_) {
return ThrowException(Exception::Error(String::New("Not initialized")));
}
int dataSize = BN_num_bytes(diffieHellman->dh->p);
char* data = new char[dataSize];
BN_bn2bin(diffieHellman->dh->p, reinterpret_cast<unsigned char*>(data));
Local<Value> outString;
outString = Encode(data, dataSize, BUFFER);
delete[] data;
return scope.Close(outString);
}
static Handle<Value> GetGenerator(const Arguments& args) {
DiffieHellman* diffieHellman =
ObjectWrap::Unwrap<DiffieHellman>(args.This());
HandleScope scope;
if (!diffieHellman->initialised_) {
return ThrowException(Exception::Error(String::New("Not initialized")));
}
int dataSize = BN_num_bytes(diffieHellman->dh->g);
char* data = new char[dataSize];
BN_bn2bin(diffieHellman->dh->g, reinterpret_cast<unsigned char*>(data));
Local<Value> outString;
outString = Encode(data, dataSize, BUFFER);
delete[] data;
return scope.Close(outString);
}
static Handle<Value> GetPublicKey(const Arguments& args) {
DiffieHellman* diffieHellman =
ObjectWrap::Unwrap<DiffieHellman>(args.This());
HandleScope scope;
if (!diffieHellman->initialised_) {
return ThrowException(Exception::Error(String::New("Not initialized")));
}
if (diffieHellman->dh->pub_key == NULL) {
return ThrowException(Exception::Error(
String::New("No public key - did you forget to generate one?")));
}
int dataSize = BN_num_bytes(diffieHellman->dh->pub_key);
char* data = new char[dataSize];
BN_bn2bin(diffieHellman->dh->pub_key,
reinterpret_cast<unsigned char*>(data));
Local<Value> outString;
outString = Encode(data, dataSize, BUFFER);
delete[] data;
return scope.Close(outString);
}
static Handle<Value> GetPrivateKey(const Arguments& args) {
DiffieHellman* diffieHellman =
ObjectWrap::Unwrap<DiffieHellman>(args.This());
HandleScope scope;
if (!diffieHellman->initialised_) {
return ThrowException(Exception::Error(String::New("Not initialized")));
}
if (diffieHellman->dh->priv_key == NULL) {
return ThrowException(Exception::Error(
String::New("No private key - did you forget to generate one?")));
}
int dataSize = BN_num_bytes(diffieHellman->dh->priv_key);
char* data = new char[dataSize];
BN_bn2bin(diffieHellman->dh->priv_key,
reinterpret_cast<unsigned char*>(data));
Local<Value> outString;
outString = Encode(data, dataSize, BUFFER);
delete[] data;
return scope.Close(outString);
}
static Handle<Value> ComputeSecret(const Arguments& args) {
HandleScope scope;
DiffieHellman* diffieHellman =
ObjectWrap::Unwrap<DiffieHellman>(args.This());
if (!diffieHellman->initialised_) {
return ThrowException(Exception::Error(String::New("Not initialized")));
}
BIGNUM* key = 0;
if (args.Length() == 0) {
return ThrowException(Exception::Error(
String::New("First argument must be other party's public key")));
} else {
ASSERT_IS_BUFFER(args[0]);
key = BN_bin2bn(
reinterpret_cast<unsigned char*>(Buffer::Data(args[0])),
Buffer::Length(args[0]), 0);
}
int dataSize = DH_size(diffieHellman->dh);
char* data = new char[dataSize];
int size = DH_compute_key(reinterpret_cast<unsigned char*>(data),
key, diffieHellman->dh);
if (size == -1) {
int checkResult;
int checked;
checked = DH_check_pub_key(diffieHellman->dh, key, &checkResult);
BN_free(key);
delete[] data;
if (!checked) {
return ThrowException(Exception::Error(String::New("Invalid key")));
} else if (checkResult) {
if (checkResult & DH_CHECK_PUBKEY_TOO_SMALL) {
return ThrowException(Exception::Error(
String::New("Supplied key is too small")));
} else if (checkResult & DH_CHECK_PUBKEY_TOO_LARGE) {
return ThrowException(Exception::Error(
String::New("Supplied key is too large")));
} else {
return ThrowException(Exception::Error(String::New("Invalid key")));
}
} else {
return ThrowException(Exception::Error(String::New("Invalid key")));
}
}
BN_free(key);
assert(size >= 0);
// DH_size returns number of bytes in a prime number
// DH_compute_key returns number of bytes in a remainder of exponent, which
// may have less bytes than a prime number. Therefore add 0-padding to the
// allocated buffer.
if (size != dataSize) {
assert(dataSize > size);
memmove(data + dataSize - size, data, size);
memset(data, 0, dataSize - size);
}
Local<Value> outString;
outString = Encode(data, dataSize, BUFFER);
delete[] data;
return scope.Close(outString);
}
static Handle<Value> SetPublicKey(const Arguments& args) {
HandleScope scope;
DiffieHellman* diffieHellman =
ObjectWrap::Unwrap<DiffieHellman>(args.This());
if (!diffieHellman->initialised_) {
return ThrowException(Exception::Error(String::New("Not initialized")));
}
if (args.Length() == 0) {
return ThrowException(Exception::Error(
String::New("First argument must be public key")));
} else {
ASSERT_IS_BUFFER(args[0]);
diffieHellman->dh->pub_key =
BN_bin2bn(
reinterpret_cast<unsigned char*>(Buffer::Data(args[0])),
Buffer::Length(args[0]), 0);
}
return args.This();
}
static Handle<Value> SetPrivateKey(const Arguments& args) {
HandleScope scope;
DiffieHellman* diffieHellman =
ObjectWrap::Unwrap<DiffieHellman>(args.This());
if (!diffieHellman->initialised_) {
return ThrowException(Exception::Error(
String::New("Not initialized")));
}
if (args.Length() == 0) {
return ThrowException(Exception::Error(
String::New("First argument must be private key")));
} else {
ASSERT_IS_BUFFER(args[0]);
diffieHellman->dh->priv_key =
BN_bin2bn(
reinterpret_cast<unsigned char*>(Buffer::Data(args[0])),
Buffer::Length(args[0]), 0);
}
return args.This();
}
DiffieHellman() : ObjectWrap() {
initialised_ = false;
dh = NULL;
}
~DiffieHellman() {
if (dh != NULL) {
DH_free(dh);
}
}
private:
bool VerifyContext() {
int codes;
if (!DH_check(dh, &codes)) return false;
if (codes & DH_CHECK_P_NOT_SAFE_PRIME) return false;
if (codes & DH_CHECK_P_NOT_PRIME) return false;
if (codes & DH_UNABLE_TO_CHECK_GENERATOR) return false;
if (codes & DH_NOT_SUITABLE_GENERATOR) return false;
return true;
}
bool initialised_;
DH* dh;
};
struct pbkdf2_req {
uv_work_t work_req;
int err;
char* pass;
size_t passlen;
char* salt;
size_t saltlen;
size_t iter;
char* key;
size_t keylen;
Persistent<Object> obj;
};
void EIO_PBKDF2(pbkdf2_req* req) {
req->err = PKCS5_PBKDF2_HMAC_SHA1(
req->pass,
req->passlen,
(unsigned char*)req->salt,
req->saltlen,
req->iter,
req->keylen,
(unsigned char*)req->key);
memset(req->pass, 0, req->passlen);
memset(req->salt, 0, req->saltlen);
}
void EIO_PBKDF2(uv_work_t* work_req) {
pbkdf2_req* req = container_of(work_req, pbkdf2_req, work_req);
EIO_PBKDF2(req);
}
void EIO_PBKDF2After(pbkdf2_req* req, Local<Value> argv[2]) {
if (req->err) {
argv[0] = Local<Value>::New(Undefined());
argv[1] = Encode(req->key, req->keylen, BUFFER);
memset(req->key, 0, req->keylen);
} else {
argv[0] = Exception::Error(String::New("PBKDF2 error"));
argv[1] = Local<Value>::New(Undefined());
}
delete[] req->pass;
delete[] req->salt;
delete[] req->key;
delete req;
}
void EIO_PBKDF2After(uv_work_t* work_req, int status) {
assert(status == 0);
pbkdf2_req* req = container_of(work_req, pbkdf2_req, work_req);
HandleScope scope;
Local<Value> argv[2];
Persistent<Object> obj = req->obj;
EIO_PBKDF2After(req, argv);
MakeCallback(obj, "ondone", ARRAY_SIZE(argv), argv);
obj.Dispose();
}
Handle<Value> PBKDF2(const Arguments& args) {
HandleScope scope;
const char* type_error = NULL;
char* pass = NULL;
char* salt = NULL;
ssize_t passlen = -1;
ssize_t saltlen = -1;
ssize_t keylen = -1;
ssize_t pass_written = -1;
ssize_t salt_written = -1;
ssize_t iter = -1;
pbkdf2_req* req = NULL;
if (args.Length() != 4 && args.Length() != 5) {
type_error = "Bad parameter";
goto err;
}
ASSERT_IS_BUFFER(args[0]);
passlen = Buffer::Length(args[0]);
if (passlen < 0) {
type_error = "Bad password";
goto err;
}
pass = new char[passlen];
pass_written = DecodeWrite(pass, passlen, args[0], BINARY);
assert(pass_written == passlen);
ASSERT_IS_BUFFER(args[1]);
saltlen = Buffer::Length(args[1]);
if (saltlen < 0) {
type_error = "Bad salt";
goto err;
}
salt = new char[saltlen];
salt_written = DecodeWrite(salt, saltlen, args[1], BINARY);
assert(salt_written == saltlen);
if (!args[2]->IsNumber()) {
type_error = "Iterations not a number";
goto err;
}
iter = args[2]->Int32Value();
if (iter < 0) {
type_error = "Bad iterations";
goto err;
}
if (!args[3]->IsNumber()) {
type_error = "Key length not a number";
goto err;
}
keylen = args[3]->Int32Value();
if (keylen < 0) {
type_error = "Bad key length";
goto err;
}
req = new pbkdf2_req;
req->err = 0;
req->pass = pass;
req->passlen = passlen;
req->salt = salt;
req->saltlen = saltlen;
req->iter = iter;
req->key = new char[keylen];
req->keylen = keylen;
if (args[4]->IsFunction()) {
req->obj = Persistent<Object>::New(Object::New());
req->obj->Set(String::New("ondone"), args[4]);
uv_queue_work(uv_default_loop(),
&req->work_req,
EIO_PBKDF2,
EIO_PBKDF2After);
return Undefined();
} else {
Local<Value> argv[2];
EIO_PBKDF2(req);
EIO_PBKDF2After(req, argv);
if (argv[0]->IsObject()) return ThrowException(argv[0]);
return scope.Close(argv[1]);
}
err:
delete[] salt;
delete[] pass;
return ThrowException(Exception::TypeError(String::New(type_error)));
}
struct RandomBytesRequest {
~RandomBytesRequest();
Persistent<Object> obj_;
unsigned long error_; // openssl error code or zero
uv_work_t work_req_;
size_t size_;
char* data_;
};
RandomBytesRequest::~RandomBytesRequest() {
if (obj_.IsEmpty()) return;
obj_.Dispose();
obj_.Clear();
}
void RandomBytesFree(char* data, void* hint) {
delete[] data;
}
template <bool pseudoRandom>
void RandomBytesWork(uv_work_t* work_req) {
RandomBytesRequest* req = container_of(work_req,
RandomBytesRequest,
work_req_);
int r;
if (pseudoRandom == true) {
r = RAND_pseudo_bytes(reinterpret_cast<unsigned char*>(req->data_),
req->size_);
} else {
r = RAND_bytes(reinterpret_cast<unsigned char*>(req->data_), req->size_);
}
// RAND_bytes() returns 0 on error. RAND_pseudo_bytes() returns 0 when the
// result is not cryptographically strong - but that's not an error.
if (r == 0 && pseudoRandom == false) {
req->error_ = ERR_get_error();
} else if (r == -1) {
req->error_ = static_cast<unsigned long>(-1);
}
}
// don't call this function without a valid HandleScope
void RandomBytesCheck(RandomBytesRequest* req, Local<Value> argv[2]) {
if (req->error_) {
char errmsg[256] = "Operation not supported";
if (req->error_ != (unsigned long) -1)
ERR_error_string_n(req->error_, errmsg, sizeof errmsg);
argv[0] = Exception::Error(String::New(errmsg));
argv[1] = Local<Value>::New(Null());
}
else {
// avoids the malloc + memcpy
Buffer* buffer = Buffer::New(req->data_, req->size_, RandomBytesFree, NULL);
argv[0] = Local<Value>::New(Null());
argv[1] = Local<Object>::New(buffer->handle_);
}
}
void RandomBytesAfter(uv_work_t* work_req, int status) {
assert(status == 0);
RandomBytesRequest* req = container_of(work_req,
RandomBytesRequest,
work_req_);
HandleScope scope;
Local<Value> argv[2];
RandomBytesCheck(req, argv);
MakeCallback(req->obj_, "ondone", ARRAY_SIZE(argv), argv);
delete req;
}
template <bool pseudoRandom>
Handle<Value> RandomBytes(const Arguments& args) {
HandleScope scope;
// maybe allow a buffer to write to? cuts down on object creation
// when generating random data in a loop
if (!args[0]->IsUint32()) {
return ThrowTypeError("Argument #1 must be number > 0");
}
const uint32_t size = args[0]->Uint32Value();
if (size > Buffer::kMaxLength) {
return ThrowTypeError("size > Buffer::kMaxLength");
}
RandomBytesRequest* req = new RandomBytesRequest();
req->error_ = 0;
req->data_ = new char[size];
req->size_ = size;
if (args[1]->IsFunction()) {
req->obj_ = Persistent<Object>::New(Object::New());
req->obj_->Set(String::New("ondone"), args[1]);
uv_queue_work(uv_default_loop(),
&req->work_req_,
RandomBytesWork<pseudoRandom>,
RandomBytesAfter);
return req->obj_;
}
else {
Local<Value> argv[2];
RandomBytesWork<pseudoRandom>(&req->work_req_);
RandomBytesCheck(req, argv);
delete req;
if (!argv[0]->IsNull())
return ThrowException(argv[0]);
else
return argv[1];
}
}
Handle<Value> GetSSLCiphers(const Arguments& args) {
HandleScope scope;
SSL_CTX* ctx = SSL_CTX_new(TLSv1_server_method());
if (ctx == NULL) {
return ThrowError("SSL_CTX_new() failed.");
}
SSL* ssl = SSL_new(ctx);
if (ssl == NULL) {
SSL_CTX_free(ctx);
return ThrowError("SSL_new() failed.");
}
Local<Array> arr = Array::New();
STACK_OF(SSL_CIPHER)* ciphers = SSL_get_ciphers(ssl);
for (int i = 0; i < sk_SSL_CIPHER_num(ciphers); ++i) {
SSL_CIPHER* cipher = sk_SSL_CIPHER_value(ciphers, i);
arr->Set(i, String::New(SSL_CIPHER_get_name(cipher)));
}
SSL_free(ssl);
SSL_CTX_free(ctx);
return scope.Close(arr);
}
template <class TypeName>
static void array_push_back(const TypeName* md,
const char* from,
const char* to,
void* arg) {
Local<Array>& arr = *static_cast<Local<Array>*>(arg);
arr->Set(arr->Length(), String::New(from));
}
Handle<Value> GetCiphers(const Arguments& args) {
HandleScope scope;
Local<Array> arr = Array::New();
EVP_CIPHER_do_all_sorted(array_push_back<EVP_CIPHER>, &arr);
return scope.Close(arr);
}
Handle<Value> GetHashes(const Arguments& args) {
HandleScope scope;
Local<Array> arr = Array::New();
EVP_MD_do_all_sorted(array_push_back<EVP_MD>, &arr);
return scope.Close(arr);
}
void InitCrypto(Handle<Object> target) {
HandleScope scope;
SSL_library_init();
OpenSSL_add_all_algorithms();
OpenSSL_add_all_digests();
SSL_load_error_strings();
ERR_load_crypto_strings();
crypto_lock_init();
CRYPTO_set_locking_callback(crypto_lock_cb);
CRYPTO_THREADID_set_callback(crypto_threadid_cb);
// Turn off compression. Saves memory - do it in userland.
#if !defined(OPENSSL_NO_COMP)
STACK_OF(SSL_COMP)* comp_methods =
#if OPENSSL_VERSION_NUMBER < 0x00908000L
SSL_COMP_get_compression_method()
#else
SSL_COMP_get_compression_methods()
#endif
;
sk_SSL_COMP_zero(comp_methods);
assert(sk_SSL_COMP_num(comp_methods) == 0);
#endif
SecureContext::Initialize(target);
Connection::Initialize(target);
Cipher::Initialize(target);
Decipher::Initialize(target);
DiffieHellman::Initialize(target);
Hmac::Initialize(target);
Hash::Initialize(target);
Sign::Initialize(target);
Verify::Initialize(target);
NODE_SET_METHOD(target, "PBKDF2", PBKDF2);
NODE_SET_METHOD(target, "randomBytes", RandomBytes<false>);
NODE_SET_METHOD(target, "pseudoRandomBytes", RandomBytes<true>);
NODE_SET_METHOD(target, "getSSLCiphers", GetSSLCiphers);
NODE_SET_METHOD(target, "getCiphers", GetCiphers);
NODE_SET_METHOD(target, "getHashes", GetHashes);
subject_symbol = NODE_PSYMBOL("subject");
issuer_symbol = NODE_PSYMBOL("issuer");
valid_from_symbol = NODE_PSYMBOL("valid_from");
valid_to_symbol = NODE_PSYMBOL("valid_to");
subjectaltname_symbol = NODE_PSYMBOL("subjectaltname");
modulus_symbol = NODE_PSYMBOL("modulus");
exponent_symbol = NODE_PSYMBOL("exponent");
fingerprint_symbol = NODE_PSYMBOL("fingerprint");
name_symbol = NODE_PSYMBOL("name");
version_symbol = NODE_PSYMBOL("version");
ext_key_usage_symbol = NODE_PSYMBOL("ext_key_usage");
}
} // namespace crypto
} // namespace node
NODE_MODULE(node_crypto, node::crypto::InitCrypto)
Zerion Mini Shell 1.0