我有一个完整的asn1架构需要转换为 XSD
如何在不使用任何asn1工具的情况下在 java 中做到这一点？我尝试antlr了库，但它对我不起作用并尝试了这段asnti代码
我有asn1架构
我有asn1二进制文件
我有二进制文件的解码输出
private static void loadDataFile(
final File berFile, final AsnSchema asnSchema, final String topLevelType) {
try {
logger.info("Loading file: " + berFile.getCanonicalPath());
final ByteSource byteSource = Files.asByteSource(berFile);
final ImmutableList < AsantiAsnData > pdus =
Asanti.decodeAsnData(byteSource, asnSchema, topLevelType);
for (int i = 0; i < pdus.size(); i++) {
logger.info("Parsing PDU[{}]", i);
final AsantiAsnData pdu = pdus.get(i);
for (final String tag: pdu.getTags()) {
try {
logger.info(
"\t{} => {} as {}",
tag,
pdu.getPrintableString(tag).get(),
pdu.getType(tag).get().getBuiltinType());
} catch (final DecodeException e) {
logger.info(
"\t{} => {} as {} (as HexString because {})",
tag,
pdu.getHexString(tag).get(),
pdu.getType(tag).get().getBuiltinType(),
e.getMessage());
}
}
for (final String tag: pdu.getUnmappedTags()) {
logger.info("\t?{} => {}", tag, pdu.getHexString(tag));
}
}
} catch (final Exception e) {
logger.error("Exception loading data file: " + e.getMessage());
}
}
/**
* This function will take a schema file and run it against the data file(s) passed. If dataFile
* is a directory then it will load all files in the directory (against the schema), and recurse
* directories. This will attempt to ignore/skip files that are not ASN.1 BER files. This will
* not propagate exceptions, will only log them.
*
* @param rootFile either a directory or ASN.1 BER binary file to decode
* @param asnSchema schema to decode against
* @param topLevelType the name of the top-level
*/
private static void handleDataFile(
final File rootFile, final AsnSchema asnSchema, final String topLevelType) {
for (final File file: Files.fileTraverser().depthFirstPreOrder(rootFile)) {
try {
if (!file.isDirectory()) {
final String name = file.getCanonicalPath();
// I don't really know what the 'right' file extensions are, so let's just rule
// out
// some of the ones that we have come across that are not BER files!
if (!name.toLowerCase().endsWith(".txt") //
&&
!name.toLowerCase().endsWith(".jpg") //
&&
!name.toLowerCase().endsWith(".bmp") //
&&
!name.toLowerCase().endsWith(".asn") //
&&
!name.toLowerCase().endsWith(".zip") //
&&
!name.toLowerCase().endsWith(".wav") //
&&
!name.toLowerCase().endsWith(".pcap") //
&&
!name.toLowerCase().endsWith(".rtp") //
&&
!name.toLowerCase().endsWith(".csv") //
&&
!name.toLowerCase().endsWith(".xlsx") //
&&
!name.toLowerCase().endsWith(".xls")) {
loadDataFile(file, asnSchema, topLevelType);
} else {
logger.debug("Ignoring file: " + name);
}
}
} catch (final Exception e) {
logger.error("Exception: " + e.getMessage());
}
}
}
/**
* Test parsing an ASN.1 schema file
*
* @param asnFile file to parse
* @throws IOException if any errors occur while parsing
*/
private static void testReadingAsnFile(final File asnFile) throws IOException {
final CharSource schemaSource = Files.asCharSource(asnFile, Charsets.UTF_8);
final AsnSchema asnSchema = AsnSchemaReader.read(schemaSource);
logger.info("User testing:");
final BufferedReader reader =
new BufferedReader(new InputStreamReader(System.in, Charsets.UTF_8));
while (true) {
System.out.print("\tEnter raw tag: ");
final String rawTag = reader.readLine();
ImmutableSet < OperationResult < DecodedTag, String >> results =
asnSchema.getDecodedTags(ImmutableList.of(rawTag), "PS-PDU");
OperationResult < DecodedTag, String > result = results.iterator().next();
logger.info(
"\t{}:\t decode {} => {}",
result.wasSuccessful() ? "PASS" : "FAIL",
rawTag,
result.getOutput().getTag());
}
}
/**
* Test parsing a BER file
*
* @param berFile file to parse
* @throws IOException if any errors occur while parsing
*/
private static void testReadingBerFile(final File berFile) throws IOException {
final ByteSource byteSource = Files.asByteSource(berFile);
final ImmutableList < RawAsnData > data = Asanti.readAsnBerData(byteSource);
int count = 0;
for (final RawAsnData rawAsnData: data) {
logger.info("PDU[" + count + "]");
final Map < String, byte[] > tagsData = rawAsnData.getBytes();
for (final String tag: Ordering.natural().sortedCopy(tagsData.keySet())) {
logger.info("\t {}: 0x{}", tag, BaseEncoding.base16().encode(tagsData.get(tag)));
}
count++;
}
}
/**
* Returns the Command Line Options for this application
*
* @return the Command Line Options for this application
*/
private static Options getOptions() {
return new Options().addOption("h", "help", false, "Print out help");
}
/**
* Performs application validation against the provided command line. If the validation fails
* then an appropriate exception will be thrown (ParseException or subclasses)
*
* @param cmdLine the command line passes to main
* @throws ParseException if there are issues with the options or arguments
*/
private static void validateCommandLine(final CommandLine cmdLine) throws ParseException {
if (cmdLine.hasOption("h")) {
throw new ParseException("");
}
if (cmdLine.getArgs().length != 1 && cmdLine.getArgs().length != 3) {
throw new MissingArgumentException("Must specify 1 or 3 arguments");
}
// All good!
}
/**
* Prints the usage message
*
* @param footerMessage adds to the footer of the message, useful for specifying known issues
* with usage.
*/
private static void printUsage(final String footerMessage) {
final String callPattern =
"USAGE: asanti [options] <asn_schema_file>" +
NEW_LINE +
" asanti [options] <asn_ber_file>" +
NEW_LINE +
" asanti [options] <asn_schema_file> <asn_ber_file> <top_level_type>" +
NEW_LINE +
NEW_LINE +
"Where:" +
NEW_LINE +
" asn_schema_file the ASN.1 schema file to parse (must end in '.asn')" +
NEW_LINE +
" asn_ber_file the ASN.1 BER file to parse (must end in '.ber')" +
NEW_LINE +
" top_level_type the name of the top level type in the schema file";
final HelpFormatter formatter = new HelpFormatter();
formatter.printHelp(callPattern, "Options:", getOptions(), NEW_LINE + footerMessage);
}
}