#include <iostream>
#include <iomanip>
#include <boost/filesystem.hpp>
+#include <boost/lexical_cast.hpp>
#include <openssl/sha.h>
+#include <libxml++/nodes/element.h>
+#include <libxml++/document.h>
+#include <xmlsec/xmldsig.h>
+#include <xmlsec/dl.h>
+#include <xmlsec/app.h>
#include "KM_util.h"
#include "KM_fileio.h"
#include "AS_DCP.h"
#include "util.h"
#include "exceptions.h"
#include "types.h"
+#include "argb_frame.h"
+#include "certificates.h"
+#include "gamma_lut.h"
+#include "xyz_frame.h"
-using namespace std;
-using namespace boost;
+using std::string;
+using std::cout;
+using std::stringstream;
+using std::min;
+using std::max;
+using std::list;
+using std::setw;
+using std::setfill;
+using boost::shared_ptr;
+using boost::lexical_cast;
+using namespace libdcp;
+/** Create a UUID.
+ * @return UUID.
+ */
string
libdcp::make_uuid ()
{
return string (buffer);
}
+
+/** Create a digest for a file.
+ * @param filename File name.
+ * @param progress Pointer to a progress reporting function, or 0. The function will be called
+ * with a progress value between 0 and 1.
+ * @return Digest.
+ */
string
-libdcp::make_digest (string filename, sigc::signal1<void, float>* progress)
+libdcp::make_digest (string filename, boost::function<void (float)>* progress)
{
- int const file_size = filesystem::file_size (filename);
-
Kumu::FileReader reader;
if (ASDCP_FAILURE (reader.OpenRead (filename.c_str ()))) {
- throw FileError ("could not open file to compute digest", filename);
+ boost::throw_exception (FileError ("could not open file to compute digest", filename));
}
SHA_CTX sha;
SHA1_Init (&sha);
-
- Kumu::ByteString read_buffer (65536);
- int done = 0;
+
+ int const buffer_size = 65536;
+ Kumu::ByteString read_buffer (buffer_size);
+
+ Kumu::fsize_t done = 0;
+ Kumu::fsize_t const size = reader.Size ();
while (1) {
ui32_t read = 0;
Kumu::Result_t r = reader.Read (read_buffer.Data(), read_buffer.Capacity(), &read);
if (r == Kumu::RESULT_ENDOFFILE) {
break;
} else if (ASDCP_FAILURE (r)) {
- throw FileError ("could not read file to compute digest", filename);
+ boost::throw_exception (FileError ("could not read file to compute digest", filename));
}
SHA1_Update (&sha, read_buffer.Data(), read);
- done += read;
if (progress) {
- (*progress) (0.5 + (0.5 * done / file_size));
+ (*progress) (float (done) / size);
+ done += read;
}
}
byte_t byte_buffer[20];
SHA1_Final (byte_buffer, &sha);
- stringstream s;
char digest[64];
return Kumu::base64encode (byte_buffer, 20, digest, 64);
}
+/** Convert a content kind to a string which can be used in a
+ * <ContentKind> node.
+ * @param kind ContentKind.
+ * @return string.
+ */
string
libdcp::content_kind_to_string (ContentKind kind)
{
assert (false);
}
+/** Convert a string from a <ContentKind> node to a libdcp ContentKind.
+ * Reasonably tolerant about varying case.
+ * @param type Content kind string.
+ * @return libdcp ContentKind.
+ */
libdcp::ContentKind
libdcp::content_kind_from_string (string type)
{
+ /* XXX: should probably just convert type to lower-case and have done with it */
+
if (type == "feature") {
return FEATURE;
} else if (type == "short") {
return SHORT;
- } else if (type == "trailer") {
+ } else if (type == "trailer" || type == "Trailer") {
return TRAILER;
} else if (type == "test") {
return TEST;
return TRANSITIONAL;
} else if (type == "rating") {
return RATING;
- } else if (type == "teaser") {
+ } else if (type == "teaser" || type == "Teaser") {
return TEASER;
} else if (type == "policy") {
return POLICY;
assert (false);
}
-
+
+/** Decompress a JPEG2000 image to a bitmap.
+ * @param data JPEG2000 data.
+ * @param size Size of data in bytes.
+ * @param reduce A power of 2 by which to reduce the size of the decoded image;
+ * e.g. 0 reduces by (2^0 == 1), ie keeping the same size.
+ * 1 reduces by (2^1 == 2), ie halving the size of the image.
+ * This is useful for scaling 4K DCP images down to 2K.
+ * @return XYZ image.
+ */
+shared_ptr<libdcp::XYZFrame>
+libdcp::decompress_j2k (uint8_t* data, int64_t size, int reduce)
+{
+ opj_dinfo_t* decoder = opj_create_decompress (CODEC_J2K);
+ opj_dparameters_t parameters;
+ opj_set_default_decoder_parameters (¶meters);
+ parameters.cp_reduce = reduce;
+ opj_setup_decoder (decoder, ¶meters);
+ opj_cio_t* cio = opj_cio_open ((opj_common_ptr) decoder, data, size);
+ opj_image_t* image = opj_decode (decoder, cio);
+ if (!image) {
+ opj_destroy_decompress (decoder);
+ opj_cio_close (cio);
+ boost::throw_exception (DCPReadError ("could not decode JPEG2000 codestream of " + lexical_cast<string> (size) + " bytes."));
+ }
+
+ opj_cio_close (cio);
+
+ image->x1 = rint (float(image->x1) / pow (2, reduce));
+ image->y1 = rint (float(image->y1) / pow (2, reduce));
+ return shared_ptr<XYZFrame> (new XYZFrame (image));
+}
+
+/** @param s A string.
+ * @return true if the string contains only space, newline or tab characters, or is empty.
+ */
bool
-libdcp::ends_with (string big, string little)
+libdcp::empty_or_white_space (string s)
+{
+ for (size_t i = 0; i < s.length(); ++i) {
+ if (s[i] != ' ' && s[i] != '\n' && s[i] != '\t') {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+void
+libdcp::init ()
+{
+ if (xmlSecInit() < 0) {
+ throw MiscError ("could not initialise xmlsec");
+ }
+
+#ifdef XMLSEC_CRYPTO_DYNAMIC_LOADING
+ if (xmlSecCryptoDLLoadLibrary(BAD_CAST XMLSEC_CRYPTO) < 0) {
+ throw MiscError ("unable to load default xmlsec-crypto library");
+ }
+#endif
+
+ if (xmlSecCryptoAppInit(0) < 0) {
+ throw MiscError ("could not initialise crypto");
+ }
+
+ if (xmlSecCryptoInit() < 0) {
+ throw MiscError ("could not initialise xmlsec-crypto");
+ }
+}
+
+/** Sign an XML node. This function takes a certificate chain (to prove that the sender is bona fide) and
+ * a private key with which to sign the node.
+ *
+ * @param parent Node to sign.
+ * @param certificates Certificate chain for the signer.
+ * @param signer_key Filename of the private key of the signer.
+ * @param ns Namespace to use for the signature XML nodes.
+ */
+void
+libdcp::add_signature_value (xmlpp::Element* parent, CertificateChain const & certificates, boost::filesystem::path signer_key, string const & ns)
+{
+ parent->add_child("SignatureValue", ns);
+
+ /* Add the certificate chain to a KeyInfo child node of parent */
+ xmlpp::Element* key_info = parent->add_child("KeyInfo", ns);
+ list<shared_ptr<Certificate> > c = certificates.leaf_to_root ();
+ for (list<shared_ptr<Certificate> >::iterator i = c.begin(); i != c.end(); ++i) {
+ xmlpp::Element* data = key_info->add_child("X509Data", ns);
+
+ {
+ xmlpp::Element* serial = data->add_child("X509IssuerSerial", ns);
+ serial->add_child("X509IssuerName", ns)->add_child_text((*i)->issuer ());
+ serial->add_child("X509SerialNumber", ns)->add_child_text((*i)->serial ());
+ }
+
+ data->add_child("X509Certificate", ns)->add_child_text((*i)->certificate());
+ }
+
+ xmlSecDSigCtxPtr signature_context = xmlSecDSigCtxCreate (0);
+ if (signature_context == 0) {
+ throw MiscError ("could not create signature context");
+ }
+
+ signature_context->signKey = xmlSecCryptoAppKeyLoad (signer_key.c_str(), xmlSecKeyDataFormatPem, 0, 0, 0);
+ if (signature_context->signKey == 0) {
+ throw FileError ("could not load private key file", signer_key);
+ }
+
+ /* XXX: set key name to the file name: is this right? */
+ if (xmlSecKeySetName (signature_context->signKey, reinterpret_cast<const xmlChar *> (signer_key.c_str())) < 0) {
+ throw MiscError ("could not set key name");
+ }
+
+ if (xmlSecDSigCtxSign (signature_context, parent->cobj ()) < 0) {
+ throw MiscError ("could not sign");
+ }
+
+ xmlSecDSigCtxDestroy (signature_context);
+}
+
+
+void
+libdcp::add_signer (xmlpp::Element* parent, CertificateChain const & certificates, string const & ns)
{
- if (little.size() > big.size()) {
- return false;
+ xmlpp::Element* signer = parent->add_child("Signer");
+
+ {
+ xmlpp::Element* data = signer->add_child("X509Data", ns);
+
+ {
+ xmlpp::Element* serial_element = data->add_child("X509IssuerSerial", ns);
+ serial_element->add_child("X509IssuerName", ns)->add_child_text (certificates.leaf()->issuer());
+ serial_element->add_child("X509SerialNumber", ns)->add_child_text (certificates.leaf()->serial());
+ }
+
+ data->add_child("X509SubjectName", ns)->add_child_text (certificates.leaf()->subject());
}
+}
+
+/** @param signer_key Filename of private key to sign with */
+void
+libdcp::sign (xmlpp::Element* parent, CertificateChain const & certificates, boost::filesystem::path signer_key, bool interop)
+{
+ add_signer (parent, certificates, "dsig");
+
+ xmlpp::Element* signature = parent->add_child("Signature", "dsig");
+
+ {
+ xmlpp::Element* signed_info = signature->add_child ("SignedInfo", "dsig");
+ signed_info->add_child("CanonicalizationMethod", "dsig")->set_attribute ("Algorithm", "http://www.w3.org/TR/2001/REC-xml-c14n-20010315");
+
+ if (interop) {
+ signed_info->add_child("SignatureMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2000/09/xmldsig#rsa-sha1");
+ } else {
+ signed_info->add_child("SignatureMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256");
+ }
+
+ {
+ xmlpp::Element* reference = signed_info->add_child("Reference", "dsig");
+ reference->set_attribute ("URI", "");
+ {
+ xmlpp::Element* transforms = reference->add_child("Transforms", "dsig");
+ transforms->add_child("Transform", "dsig")->set_attribute (
+ "Algorithm", "http://www.w3.org/2000/09/xmldsig#enveloped-signature"
+ );
+ }
+ reference->add_child("DigestMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2000/09/xmldsig#sha1");
+ /* This will be filled in by the signing later */
+ reference->add_child("DigestValue", "dsig");
+ }
+ }
+
+ add_signature_value (signature, certificates, signer_key, "dsig");
+}
+
+bool libdcp::operator== (libdcp::Size const & a, libdcp::Size const & b)
+{
+ return (a.width == b.width && a.height == b.height);
+}
+
+bool libdcp::operator!= (libdcp::Size const & a, libdcp::Size const & b)
+{
+ return !(a == b);
+}
+
+/** The base64 decode routine in KM_util.cpp gives different values to both
+ * this and the command-line base64 for some inputs. Not sure why.
+ */
+int
+libdcp::base64_decode (string const & in, unsigned char* out, int out_length)
+{
+ BIO* b64 = BIO_new (BIO_f_base64 ());
- return big.compare (big.length() - little.length(), little.length(), little) == 0;
+ /* This means the input should have no newlines */
+ BIO_set_flags (b64, BIO_FLAGS_BASE64_NO_NL);
+
+ /* Copy our input string, removing newlines */
+ char in_buffer[in.size() + 1];
+ char* p = in_buffer;
+ for (size_t i = 0; i < in.size(); ++i) {
+ if (in[i] != '\n' && in[i] != '\r') {
+ *p++ = in[i];
+ }
+ }
+
+ BIO* bmem = BIO_new_mem_buf (in_buffer, p - in_buffer);
+ bmem = BIO_push (b64, bmem);
+ int const N = BIO_read (bmem, out, out_length);
+ BIO_free_all (bmem);
+
+ return N;
+}
+
+string
+libdcp::tm_to_string (struct tm* tm)
+{
+ char buffer[64];
+ strftime (buffer, 64, "%Y-%m-%dT%I:%M:%S", tm);
+
+ int offset = 0;
+
+#ifdef LIBDCP_POSIX
+ offset = tm->tm_gmtoff / 60;
+#else
+ TIME_ZONE_INFORMATION tz;
+ GetTimeZoneInformation (&tz);
+ offset = tz.Bias;
+#endif
+
+ return string (buffer) + utc_offset_to_string (offset);
+}
+
+/** @param b Offset from UTC to local time in minutes.
+ * @return string of the form e.g. -01:00.
+ */
+string
+libdcp::utc_offset_to_string (int b)
+{
+ bool const negative = (b < 0);
+ b = negative ? -b : b;
+
+ int const hours = b / 60;
+ int const minutes = b % 60;
+
+ stringstream o;
+ if (negative) {
+ o << "-";
+ } else {
+ o << "+";
+ }
+
+ o << setw(2) << setfill('0') << hours << ":" << setw(2) << setfill('0') << minutes;
+ return o.str ();
+}
+
+string
+libdcp::ptime_to_string (boost::posix_time::ptime t)
+{
+ struct tm t_tm = boost::posix_time::to_tm (t);
+ return tm_to_string (&t_tm);
}
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