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|
/*****************************************************************
|
| AP4 - MP4 DCF Packager
|
| Copyright 2002-2008 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL is free software; you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation; either version 2, or (at your option)
| any later version.
|
| Bento4|GPL is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License
| along with Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include "Ap4.h"
/*----------------------------------------------------------------------
| constants
+---------------------------------------------------------------------*/
#define BANNER "MP4 DCF Packager - Version 1.0.1\n"\
"(Bento4 Version " AP4_VERSION_STRING ")\n"\
"(c) 2002-2009 Axiomatic Systems, LLC"
/*----------------------------------------------------------------------
| PrintUsageAndExit
+---------------------------------------------------------------------*/
static void
PrintUsageAndExit()
{
fprintf(stderr,
BANNER
"\n\n"
"usage: mp4dcfpackager --method <method> [options] <input> <output>\n"
" --method: <method> is NULL, CBC or CTR\n"
" Options:\n"
" --show-progress: show progress details\n"
" --content-type: content MIME type\n"
" --content-id: content ID\n"
" --rights-issuer: rights issuer URL\n"
" --key <k>:<iv>\n"
" Specifies the key to use for encryption.\n"
" <k> a 128-bit key in hex (32 characters)\n"
" and <iv> a 128-bit IV or salting key in hex (32 characters)\n"
" --textual-header <name>:<value>\n"
" Specifies a textual header where <name> is the header name,\n"
" and <value> is the header value\n"
" (several --textual-header options can be used)\n"
"\n"
);
exit(1);
}
/*----------------------------------------------------------------------
| main
+---------------------------------------------------------------------*/
int
main(int argc, char** argv)
{
if (argc == 1) PrintUsageAndExit();
// parse options
AP4_UI08 encryption_method = 0;
bool encryption_method_is_set = false;
AP4_UI08 padding_scheme = 0;
const char* input_filename = NULL;
const char* output_filename = NULL;
bool show_progress = false;
bool key_is_set = false;
unsigned char key[16];
unsigned char iv[16];
AP4_BlockCipher::CipherMode cipher_mode = AP4_BlockCipher::CBC;
const char* content_type = "";
const char* content_id = "";
const char* rights_issuer_url = "";
AP4_LargeSize plaintext_length = 0;
AP4_DataBuffer textual_headers_buffer;
AP4_TrackPropertyMap textual_headers;
AP4_SetMemory(key, 0, sizeof(key));
AP4_SetMemory(iv, 0, sizeof(iv));
// parse the command line arguments
char* arg;
while ((arg = *++argv)) {
if (!strcmp(arg, "--method")) {
arg = *++argv;
if (!strcmp(arg, "CBC")) {
encryption_method = AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CBC;
encryption_method_is_set = true;
padding_scheme = AP4_OMA_DCF_PADDING_SCHEME_RFC_2630;
cipher_mode = AP4_BlockCipher::CBC;
} else if (!strcmp(arg, "CTR")) {
encryption_method = AP4_OMA_DCF_ENCRYPTION_METHOD_AES_CTR;
encryption_method_is_set = true;
padding_scheme = AP4_OMA_DCF_PADDING_SCHEME_NONE;
cipher_mode = AP4_BlockCipher::CTR;
} else if (!strcmp(arg, "NULL")) {
encryption_method = AP4_OMA_DCF_ENCRYPTION_METHOD_NULL;
encryption_method_is_set = true;
padding_scheme = AP4_OMA_DCF_PADDING_SCHEME_NONE;
} else {
fprintf(stderr, "ERROR: invalid value for --method argument\n");
return 1;
}
} else if (!strcmp(arg, "--show-progress")) {
show_progress = true;
} else if (!strcmp(arg, "--content-type")) {
content_type = *++argv;
if (content_type == NULL) {
fprintf(stderr, "ERROR: missing argument for --content-type option\n");
return 1;
}
} else if (!strcmp(arg, "--content-id")) {
content_id = *++argv;
if (content_id == NULL) {
fprintf(stderr, "ERROR: missing argument for --content-id option\n");
return 1;
}
} else if (!strcmp(arg, "--rights-issuer")) {
rights_issuer_url = *++argv;
if (rights_issuer_url == NULL) {
fprintf(stderr, "ERROR: missing argument for --rights-issuer option\n");
return 1;
}
} else if (!strcmp(arg, "--key")) {
if (!encryption_method_is_set) {
fprintf(stderr, "ERROR: --method argument must appear before --key\n");
return 1;
} else if (encryption_method == AP4_OMA_DCF_ENCRYPTION_METHOD_NULL) {
fprintf(stderr, "ERROR: --key cannot be used with --method NULL\n");
return 1;
}
arg = *++argv;
if (arg == NULL) {
fprintf(stderr, "ERROR: missing argument for --key option\n");
return 1;
}
char* key_ascii = NULL;
char* iv_ascii = NULL;
if (AP4_FAILED(AP4_SplitArgs(arg, key_ascii, iv_ascii))) {
fprintf(stderr, "ERROR: invalid argument for --key option\n");
return 1;
}
if (AP4_ParseHex(key_ascii, key, 16)) {
fprintf(stderr, "ERROR: invalid hex format for key\n");
}
if (AP4_ParseHex(iv_ascii, iv, 16)) {
fprintf(stderr, "ERROR: invalid hex format for iv\n");
return 1;
}
// check that the key is not already there
if (key_is_set) {
fprintf(stderr, "ERROR: key already set\n");
return 1;
}
key_is_set = true;
} else if (!strcmp(arg, "--textual-header")) {
char* name = NULL;
char* value = NULL;
arg = *++argv;
if (arg == NULL) {
fprintf(stderr, "ERROR: missing argument for --textual-header option\n");
return 1;
}
if (AP4_FAILED(AP4_SplitArgs(arg, name, value))) {
fprintf(stderr, "ERROR: invalid argument for --textual-header option\n");
return 1;
}
// check that the property is not already set
if (textual_headers.GetProperty(0, name)) {
fprintf(stderr, "ERROR: textual header %s already set\n", name);
return 1;
}
// set the property in the map
textual_headers.SetProperty(0, name, value);
} else if (input_filename == NULL) {
input_filename = arg;
} else if (output_filename == NULL) {
output_filename = arg;
} else {
fprintf(stderr, "ERROR: unexpected argument (%s)\n", arg);
return 1;
}
}
// check the arguments
if (!encryption_method_is_set) {
fprintf(stderr, "ERROR: missing --method argument\n");
return 1;
}
if (!key_is_set) {
fprintf(stderr, "ERROR: encryption key not specified\n");
return 1;
}
if (input_filename == NULL) {
fprintf(stderr, "ERROR: missing input filename\n");
return 1;
}
if (output_filename == NULL) {
fprintf(stderr, "ERROR: missing output filename\n");
return 1;
}
(void)show_progress; // avoid warnings
// convert to a textual headers buffer
textual_headers.GetTextualHeaders(0, textual_headers_buffer);
// create the input stream
AP4_Result result;
AP4_ByteStream* input = NULL;
result = AP4_FileByteStream::Create(input_filename, AP4_FileByteStream::STREAM_MODE_READ, input);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open input file (%s) %d\n", input_filename, result);
return 1;
}
// get the size of the input
result = input->GetSize(plaintext_length);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot get the size of the input\n");
return 1;
}
// create an encrypting stream for the input
AP4_ByteStream* encrypted_stream;
if (encryption_method == AP4_OMA_DCF_ENCRYPTION_METHOD_NULL) {
encrypted_stream = input;
} else {
result = AP4_EncryptingStream::Create(cipher_mode, *input, iv, 16, key, 16, true, &AP4_DefaultBlockCipherFactory::Instance, encrypted_stream);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: failed to create cipher (%d)\n", result);
return 1;
}
}
// create the output stream
AP4_ByteStream* output = NULL;
result = AP4_FileByteStream::Create(output_filename, AP4_FileByteStream::STREAM_MODE_WRITE, output);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open output file (%s) %d\n", output_filename, result);
return 1;
}
// create the file
AP4_File file;
// set the brand
AP4_UI32 compatible_brands[1] = {AP4_OMA_DCF_BRAND_ODCF};
file.SetFileType(AP4_OMA_DCF_BRAND_ODCF, 2, compatible_brands, 1);
// create the odrm atom (force a 64-bit size)
AP4_ContainerAtom* odrm = new AP4_ContainerAtom(AP4_ATOM_TYPE_ODRM, AP4_FULL_ATOM_HEADER_SIZE_64, true, 0, 0);
// create the ohdr atom
AP4_OhdrAtom* ohdr = new AP4_OhdrAtom(encryption_method,
padding_scheme,
plaintext_length,
content_id,
rights_issuer_url,
textual_headers_buffer.GetData(),
textual_headers_buffer.GetDataSize());
// create the odhe atom (the ownership is transfered)
AP4_OdheAtom* odhe = new AP4_OdheAtom(content_type, ohdr);
odrm->AddChild(odhe);
// create the odda atom
AP4_OddaAtom* odda = new AP4_OddaAtom(*encrypted_stream);
odrm->AddChild(odda);
// add the odrm atom to the file (the owndership is transfered)
file.GetTopLevelAtoms().Add(odrm);
// write the file to the output
AP4_FileWriter::Write(file, *output);
// cleanup
input->Release();
output->Release();
return 0;
}
|
