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node_crypto.cc
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node_crypto.cc
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#include <node_crypto.h>
#include <v8.h>
#include <node.h>
#include <node_buffer.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#if OPENSSL_VERSION_NUMBER >= 0x10000000L
# define OPENSSL_CONST const
#else
# define OPENSSL_CONST
#endif
namespace node {
using namespace v8;
static Persistent<String> errno_symbol;
static Persistent<String> syscall_symbol;
static Persistent<String> subject_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 int verify_callback(int ok, X509_STORE_CTX *ctx) {
assert(ok);
return(1); // Ignore errors by now. VerifyPeer will catch them by using SSL_get_verify_result.
}
void SecureContext::Initialize(Handle<Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(SecureContext::New);
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, "setCiphers", SecureContext::SetCiphers);
NODE_SET_PROTOTYPE_METHOD(t, "close", SecureContext::Close);
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) {
if (!args[0]->IsString())
return ThrowException(Exception::TypeError(
String::New("Bad parameter")));
String::Utf8Value sslmethod(args[0]->ToString());
if (strcmp(*sslmethod, "SSLv2_method") == 0)
method = SSLv2_method();
if (strcmp(*sslmethod, "SSLv2_server_method") == 0)
method = SSLv2_server_method();
if (strcmp(*sslmethod, "SSLv2_client_method") == 0)
method = SSLv2_client_method();
if (strcmp(*sslmethod, "SSLv3_method") == 0)
method = SSLv3_method();
if (strcmp(*sslmethod, "SSLv3_server_method") == 0)
method = SSLv3_server_method();
if (strcmp(*sslmethod, "SSLv3_client_method") == 0)
method = SSLv3_client_method();
if (strcmp(*sslmethod, "SSLv23_method") == 0)
method = SSLv23_method();
if (strcmp(*sslmethod, "SSLv23_server_method") == 0)
method = SSLv23_server_method();
if (strcmp(*sslmethod, "SSLv23_client_method") == 0)
method = SSLv23_client_method();
if (strcmp(*sslmethod, "TLSv1_method") == 0)
method = TLSv1_method();
if (strcmp(*sslmethod, "TLSv1_server_method") == 0)
method = TLSv1_server_method();
if (strcmp(*sslmethod, "TLSv1_client_method") == 0)
method = TLSv1_client_method();
}
sc->ctx_ = SSL_CTX_new(method);
// Enable session caching?
SSL_CTX_set_session_cache_mode(sc->ctx_, SSL_SESS_CACHE_SERVER);
// SSL_CTX_set_session_cache_mode(sc->ctx_,SSL_SESS_CACHE_OFF);
sc->ca_store_ = X509_STORE_new();
SSL_CTX_set_cert_store(sc->ctx_, sc->ca_store_);
return True();
}
Handle<Value> SecureContext::SetKey(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 key_pem(args[0]->ToString());
BIO *bp = BIO_new(BIO_s_mem());
if (!BIO_write(bp, *key_pem, key_pem.length())) {
BIO_free(bp);
return False();
}
EVP_PKEY* pkey = PEM_read_bio_PrivateKey(bp, NULL, NULL, NULL);
if (pkey == NULL) {
BIO_free(bp);
return False();
}
SSL_CTX_use_PrivateKey(sc->ctx_, pkey);
BIO_free(bp);
// XXX Free pkey?
return True();
}
Handle<Value> SecureContext::SetCert(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 cert_pem(args[0]->ToString());
BIO *bp = BIO_new(BIO_s_mem());
if (!BIO_write(bp, *cert_pem, cert_pem.length())) {
BIO_free(bp);
return False();
}
X509 * x509 = PEM_read_bio_X509(bp, NULL, NULL, NULL);
if (x509 == NULL) {
BIO_free(bp);
return False();
}
SSL_CTX_use_certificate(sc->ctx_, x509);
BIO_free(bp);
X509_free(x509);
return True();
}
Handle<Value> SecureContext::AddCACert(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 cert_pem(args[0]->ToString());
BIO *bp = BIO_new(BIO_s_mem());
if (!BIO_write(bp, *cert_pem, cert_pem.length())) {
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(sc->ca_store_, x509);
BIO_free(bp);
X509_free(x509);
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]->ToString());
SSL_CTX_set_cipher_list(sc->ctx_, *ciphers);
return True();
}
Handle<Value> SecureContext::Close(const Arguments& args) {
HandleScope scope;
SecureContext *sc = ObjectWrap::Unwrap<SecureContext>(args.Holder());
if (sc->ctx_ != NULL) {
SSL_CTX_free(sc->ctx_);
return True();
}
return False();
}
char ssl_error_buf[512];
static int serr(SSL *ssl, const char* func, int rv)
{
if (rv >= 0) {
return rv;
}
int err = SSL_get_error(ssl, rv);
if (err != SSL_ERROR_WANT_WRITE &&
err != SSL_ERROR_WANT_READ) {
/* TODO: look at ssl error queue */
ERR_error_string_n(ERR_get_error(), &ssl_error_buf[0], sizeof(ssl_error_buf));
/* fprintf(stderr, "[%p] SSL: %s failed: (%d:%d) %s\n", ssl, func, err, rv, buf); */
return rv;
}
else if (err == SSL_ERROR_WANT_WRITE) {
/* fprintf(stderr, "[%p] SSL: %s want write\n", ssl, func); */
}
else if (err == SSL_ERROR_WANT_READ) {
/* fprintf(stderr, "[%p] SSL: %s want read\n", ssl, func); */
}
return 0;
}
void SecureStream::Initialize(Handle<Object> target) {
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(SecureStream::New);
t->InstanceTemplate()->SetInternalFieldCount(1);
t->SetClassName(String::NewSymbol("SecureStream"));
NODE_SET_PROTOTYPE_METHOD(t, "encIn", SecureStream::EncIn);
NODE_SET_PROTOTYPE_METHOD(t, "clearOut", SecureStream::ClearOut);
NODE_SET_PROTOTYPE_METHOD(t, "clearIn", SecureStream::ClearIn);
NODE_SET_PROTOTYPE_METHOD(t, "encOut", SecureStream::EncOut);
NODE_SET_PROTOTYPE_METHOD(t, "clearPending", SecureStream::ClearPending);
NODE_SET_PROTOTYPE_METHOD(t, "encPending", SecureStream::EncPending);
NODE_SET_PROTOTYPE_METHOD(t, "getPeerCertificate", SecureStream::GetPeerCertificate);
NODE_SET_PROTOTYPE_METHOD(t, "isInitFinished", SecureStream::IsInitFinished);
NODE_SET_PROTOTYPE_METHOD(t, "verifyPeer", SecureStream::VerifyPeer);
NODE_SET_PROTOTYPE_METHOD(t, "getCurrentCipher", SecureStream::GetCurrentCipher);
NODE_SET_PROTOTYPE_METHOD(t, "start", SecureStream::Start);
NODE_SET_PROTOTYPE_METHOD(t, "shutdown", SecureStream::Shutdown);
NODE_SET_PROTOTYPE_METHOD(t, "close", SecureStream::Close);
target->Set(String::NewSymbol("SecureStream"), t->GetFunction());
}
Handle<Value> SecureStream::New(const Arguments& args) {
HandleScope scope;
SecureStream *p = new SecureStream();
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();
bool should_verify = args[2]->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_bio(p->ssl_, p->bio_read_, p->bio_write_);
if ((p->should_verify_ = should_verify)) {
SSL_set_verify(p->ssl_, SSL_VERIFY_PEER, verify_callback);
}
if ((p->is_server_ = is_server)) {
SSL_set_accept_state(p->ssl_);
} else {
SSL_set_connect_state(p->ssl_);
}
return args.This();
}
Handle<Value> SecureStream::EncIn(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
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")));
}
Local<Object> buffer_obj = args[0]->ToObject();
char *buffer_data = Buffer::Data(buffer_obj);
size_t buffer_length = Buffer::Length(buffer_obj);
size_t off = args[1]->Int32Value();
if (off >= buffer_length) {
return ThrowException(Exception::Error(
String::New("Offset is out of bounds")));
}
size_t len = args[2]->Int32Value();
if (off + len > buffer_length) {
return ThrowException(Exception::Error(
String::New("Length is extends beyond buffer")));
}
int bytes_written = serr(ss->ssl_, "BIO_write", BIO_write(ss->bio_read_, (char*)buffer_data + off, len));
if (bytes_written < 0) {
if (errno == EAGAIN || errno == EINTR) return Null();
return ThrowException(ErrnoException(errno, "read"));
}
return scope.Close(Integer::New(bytes_written));
}
Handle<Value> SecureStream::ClearOut(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
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")));
}
Local<Object> buffer_obj = args[0]->ToObject();
char *buffer_data = Buffer::Data(buffer_obj);
size_t buffer_length = Buffer::Length(buffer_obj);
size_t off = args[1]->Int32Value();
if (off >= buffer_length) {
return ThrowException(Exception::Error(
String::New("Offset is out of bounds")));
}
size_t len = args[2]->Int32Value();
if (off + len > buffer_length) {
return ThrowException(Exception::Error(
String::New("Length is extends beyond buffer")));
}
int bytes_read;
if (!SSL_is_init_finished(ss->ssl_)) {
if (ss->is_server_) {
bytes_read = serr(ss->ssl_, "SSL_accept:ClearOut", SSL_accept(ss->ssl_));
} else {
bytes_read = serr(ss->ssl_, "SSL_connect:ClearOut", SSL_connect(ss->ssl_));
}
if (bytes_read < 0) {
return ThrowException(Exception::Error(v8::String::New(ssl_error_buf)));
}
return scope.Close(Integer::New(0));
}
bytes_read = serr(ss->ssl_, "SSL_read:ClearOut", SSL_read(ss->ssl_, (char*)buffer_data + off, len));
if (bytes_read < 0) {
return ThrowException(Exception::Error(v8::String::New(ssl_error_buf)));
}
return scope.Close(Integer::New(bytes_read));
}
Handle<Value> SecureStream::ClearPending(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
int bytes_pending = BIO_pending(ss->bio_read_);
return scope.Close(Integer::New(bytes_pending));
}
Handle<Value> SecureStream::EncPending(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
int bytes_pending = BIO_pending(ss->bio_write_);
return scope.Close(Integer::New(bytes_pending));
}
Handle<Value> SecureStream::EncOut(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
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")));
}
Local<Object> buffer_obj = args[0]->ToObject();
char *buffer_data = Buffer::Data(buffer_obj);
size_t buffer_length = Buffer::Length(buffer_obj);
size_t off = args[1]->Int32Value();
if (off >= buffer_length) {
return ThrowException(Exception::Error(
String::New("Offset is out of bounds")));
}
size_t len = args[2]->Int32Value();
if (off + len > buffer_length) {
return ThrowException(Exception::Error(
String::New("Length is extends beyond buffer")));
}
int bytes_read = serr(ss->ssl_, "BIO_read:EncOut", BIO_read(ss->bio_write_, (char*)buffer_data + off, len));
return scope.Close(Integer::New(bytes_read));
}
Handle<Value> SecureStream::ClearIn(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
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")));
}
Local<Object> buffer_obj = args[0]->ToObject();
char *buffer_data = Buffer::Data(buffer_obj);
size_t buffer_length = Buffer::Length(buffer_obj);
size_t off = args[1]->Int32Value();
if (off >= buffer_length) {
return ThrowException(Exception::Error(
String::New("Offset is out of bounds")));
}
size_t len = args[2]->Int32Value();
if (off + len > buffer_length) {
return ThrowException(Exception::Error(
String::New("Length is extends beyond buffer")));
}
if (!SSL_is_init_finished(ss->ssl_)) {
int s;
if (ss->is_server_) {
s = serr(ss->ssl_, "SSL_accept:ClearIn", SSL_accept(ss->ssl_));
} else {
s = serr(ss->ssl_, "SSL_connect:ClearIn", SSL_connect(ss->ssl_));
}
if (s < 0) {
return ThrowException(Exception::Error(v8::String::New(ssl_error_buf)));
}
return scope.Close(Integer::New(0));
}
int bytes_written = serr(ss->ssl_, "SSL_write:ClearIn", SSL_write(ss->ssl_, (char*)buffer_data + off, len));
if (bytes_written < 0) {
return ThrowException(Exception::Error(v8::String::New(ssl_error_buf)));
}
return scope.Close(Integer::New(bytes_written));
}
Handle<Value> SecureStream::GetPeerCertificate(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
if (ss->ssl_ == NULL) return Undefined();
Local<Object> info = Object::New();
X509* peer_cert = SSL_get_peer_certificate(ss->ssl_);
if (peer_cert != NULL) {
char* subject = X509_NAME_oneline(X509_get_subject_name(peer_cert), 0, 0);
if (subject != NULL) {
info->Set(subject_symbol, String::New(subject));
OPENSSL_free(subject);
}
char* issuer = X509_NAME_oneline(X509_get_issuer_name(peer_cert), 0, 0);
if (subject != NULL) {
info->Set(issuer_symbol, String::New(issuer));
OPENSSL_free(issuer);
}
char buf[256];
BIO* bio = BIO_new(BIO_s_mem());
ASN1_TIME_print(bio, X509_get_notBefore(peer_cert));
memset(buf, 0, sizeof(buf));
BIO_read(bio, buf, sizeof(buf) - 1);
info->Set(valid_from_symbol, String::New(buf));
ASN1_TIME_print(bio, X509_get_notAfter(peer_cert));
memset(buf, 0, sizeof(buf));
BIO_read(bio, buf, sizeof(buf) - 1);
BIO_free(bio);
info->Set(valid_to_symbol, String::New(buf));
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));
}
X509_free(peer_cert);
}
return scope.Close(info);
}
Handle<Value> SecureStream::Start(const Arguments& args) {
HandleScope scope;
int rv;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
if (!SSL_is_init_finished(ss->ssl_)) {
if (ss->is_server_) {
rv = serr(ss->ssl_, "SSL_accept:Start", SSL_accept(ss->ssl_));
} else {
rv = serr(ss->ssl_, "SSL_connect:Start", SSL_connect(ss->ssl_));
}
if (rv < 0) {
return ThrowException(Exception::Error(v8::String::New(ssl_error_buf)));
}
if (rv == 1) {
return True();
}
else {
return False();
}
}
return True();
}
Handle<Value> SecureStream::Shutdown(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
if (ss->ssl_ == NULL) return False();
if (SSL_shutdown(ss->ssl_) == 1) {
return True();
}
return False();
}
Handle<Value> SecureStream::IsInitFinished(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
if (ss->ssl_ == NULL) return False();
if (SSL_is_init_finished(ss->ssl_)) {
return True();
}
return False();
}
Handle<Value> SecureStream::VerifyPeer(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
if (ss->ssl_ == NULL) return False();
if (!ss->should_verify_) return False();
X509* peer_cert = SSL_get_peer_certificate(ss->ssl_);
if (peer_cert==NULL) return False();
X509_free(peer_cert);
long x509_verify_error = SSL_get_verify_result(ss->ssl_);
// Can also check for:
// X509_V_ERR_CERT_HAS_EXPIRED
// X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT
// X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN
// X509_V_ERR_INVALID_CA
// X509_V_ERR_PATH_LENGTH_EXCEEDED
// X509_V_ERR_INVALID_PURPOSE
// X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT
// printf("%s\n", X509_verify_cert_error_string(x509_verify_error));
if (!x509_verify_error) return True();
return False();
}
Handle<Value> SecureStream::GetCurrentCipher(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
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> SecureStream::Close(const Arguments& args) {
HandleScope scope;
SecureStream *ss = ObjectWrap::Unwrap<SecureStream>(args.Holder());
if (ss->ssl_ != NULL) {
SSL_free(ss->ssl_);
ss->ssl_ = NULL;
}
return True();
}
static void HexEncode(unsigned char *md_value,
int md_len,
char** md_hexdigest,
int* md_hex_len) {
*md_hex_len = (2*(md_len));
*md_hexdigest = new char[*md_hex_len + 1];
for (int i = 0; i < md_len; i++) {
snprintf((char *)(*md_hexdigest + (i*2)), 3, "%02x", md_value[i]);
}
}
#define hex2i(c) ((c) <= '9' ? ((c) - '0') : (c) <= 'Z' ? ((c) - 'A' + 10) \
: ((c) - 'a' + 10))
static void HexDecode(unsigned char *input,
int length,
char** buf64,
int* buf64_len) {
*buf64_len = (length/2);
*buf64 = new char[length/2 + 1];
char *b = *buf64;
for(int i = 0; i < length-1; i+=2) {
b[i/2] = (hex2i(input[i])<<4) | (hex2i(input[i+1]));
}
}
void base64(unsigned char *input, int length, char** buf64, int* buf64_len) {
BIO *bmem, *b64;
BUF_MEM *bptr;
int len;
b64 = BIO_new(BIO_f_base64());
bmem = BIO_new(BIO_s_mem());
b64 = BIO_push(b64, bmem);
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
len = BIO_write(b64, input, length);
assert(len == length);
int r = BIO_flush(b64);
assert(r == 1);
BIO_get_mem_ptr(b64, &bptr);
*buf64_len = bptr->length;
*buf64 = new char[*buf64_len+1];
memcpy(*buf64, bptr->data, bptr->length);
char* b = *buf64;
b[bptr->length] = 0;
BIO_free_all(b64);
}
void unbase64(unsigned char *input,
int length,
char** buffer,
int* buffer_len) {
BIO *b64, *bmem;
*buffer = new char[length];
memset(*buffer, 0, length);
b64 = BIO_new(BIO_f_base64());
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
bmem = BIO_new_mem_buf(input, length);
bmem = BIO_push(b64, bmem);
*buffer_len = BIO_read(bmem, *buffer, length);
BIO_free_all(bmem);
}
// LengthWithoutIncompleteUtf8 from V8 d8-posix.cc
// see http://v8.googlecode.com/svn/trunk/src/d8-posix.cc
static int LengthWithoutIncompleteUtf8(char* buffer, int len) {
int answer = len;
// 1-byte encoding.
static const int kUtf8SingleByteMask = 0x80;
static const int kUtf8SingleByteValue = 0x00;
// 2-byte encoding.
static const int kUtf8TwoByteMask = 0xe0;
static const int kUtf8TwoByteValue = 0xc0;
// 3-byte encoding.
static const int kUtf8ThreeByteMask = 0xf0;
static const int kUtf8ThreeByteValue = 0xe0;
// 4-byte encoding.
static const int kUtf8FourByteMask = 0xf8;
static const int kUtf8FourByteValue = 0xf0;
// Subsequent bytes of a multi-byte encoding.
static const int kMultiByteMask = 0xc0;
static const int kMultiByteValue = 0x80;
int multi_byte_bytes_seen = 0;
while (answer > 0) {
int c = buffer[answer - 1];
// Ends in valid single-byte sequence?
if ((c & kUtf8SingleByteMask) == kUtf8SingleByteValue) return answer;
// Ends in one or more subsequent bytes of a multi-byte value?
if ((c & kMultiByteMask) == kMultiByteValue) {
multi_byte_bytes_seen++;
answer--;
} else {
if ((c & kUtf8TwoByteMask) == kUtf8TwoByteValue) {
if (multi_byte_bytes_seen >= 1) {
return answer + 2;
}
return answer - 1;
} else if ((c & kUtf8ThreeByteMask) == kUtf8ThreeByteValue) {
if (multi_byte_bytes_seen >= 2) {
return answer + 3;
}
return answer - 1;
} else if ((c & kUtf8FourByteMask) == kUtf8FourByteValue) {
if (multi_byte_bytes_seen >= 3) {
return answer + 4;
}
return answer - 1;
} else {
return answer; // Malformed UTF-8.
}
}
}
return 0;
}
// local decrypt final without strict padding check
// to work with php mcrypt
// see http://www.mail-archive.com/openssl-dev@openssl.org/msg19927.html
int local_EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx,
unsigned char *out,
int *outl) {
int i,b;
int n;
*outl=0;
b=ctx->cipher->block_size;
if (ctx->flags & EVP_CIPH_NO_PADDING) {
if(ctx->buf_len) {
EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
return 0;
}
*outl = 0;
return 1;
}
if (b > 1) {
if (ctx->buf_len || !ctx->final_used) {
EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_WRONG_FINAL_BLOCK_LENGTH);
return(0);
}
if (b > (int)(sizeof(ctx->final) / sizeof(ctx->final[0]))) {
EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_BAD_DECRYPT);
return(0);
}
n=ctx->final[b-1];
if (n > b) {
EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_BAD_DECRYPT);
return(0);
}
for (i=0; i<n; i++) {
if (ctx->final[--b] != n) {
EVPerr(EVP_F_EVP_DECRYPTFINAL,EVP_R_BAD_DECRYPT);
return(0);
}
}
n=ctx->cipher->block_size-n;
for (i=0; i<n; i++) {
out[i]=ctx->final[i];
}
*outl=n;
} else {
*outl=0;
}
return(1);
}
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, "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(&ctx,cipher,(unsigned char *)key,(unsigned char *)iv, 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;
}
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;
}
if (EVP_CIPHER_iv_length(cipher)!=iv_len) {
fprintf(stderr, "node-crypto : Invalid IV length %d\n", iv_len);
return false;
}
EVP_CIPHER_CTX_init(&ctx);
EVP_CipherInit(&ctx,cipher,(unsigned char *)key,(unsigned char *)iv, 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;
}
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];
EVP_CipherUpdate(&ctx, *out, out_len, (unsigned char*)data, len);
return 1;
}
int CipherFinal(unsigned char** out, int *out_len) {
if (!initialised_) return 0;
*out = new unsigned char[EVP_CIPHER_CTX_block_size(&ctx)];
EVP_CipherFinal(&ctx,*out,out_len);
EVP_CIPHER_CTX_cleanup(&ctx);
initialised_ = false;
return 1;
}
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());
cipher->incomplete_base64=NULL;
if (args.Length() <= 1 || !args[0]->IsString() || !args[1]->IsString()) {
return ThrowException(Exception::Error(String::New(
"Must give cipher-type, key")));
}
ssize_t key_buf_len = DecodeBytes(args[1], BINARY);
if (key_buf_len < 0) {
Local<Value> exception = Exception::TypeError(String::New("Bad argument"));
return ThrowException(exception);
}