/**
* Reads configuration entries
*
* @param rdr The {@link BufferedReader} to use
* @return The {@link List} of read {@link KnownHostEntry}-ies
* @throws IOException If failed to parse the read configuration
*/
public static List<KnownHostEntry> readKnownHostEntries(BufferedReader rdr) throws IOException {
List<KnownHostEntry> entries = null;
int lineNumber = 1;
for (String line = rdr.readLine(); line != null; line = rdr.readLine(), lineNumber++) {
line = GenericUtils.trimToEmpty(line);
if (GenericUtils.isEmpty(line)) {
continue;
}
int pos = line.indexOf(SshConfigFileReader.COMMENT_CHAR);
if (pos == 0) {
continue;
}
if (pos > 0) {
line = line.substring(0, pos);
line = line.trim();
}
try {
KnownHostEntry entry = parseKnownHostEntry(line);
if (entry == null) {
continue;
}
if (entries == null) {
entries = new ArrayList<>();
}
entries.add(entry);
} catch (RuntimeException | Error e) { // TODO consider consulting a user callback
throw new StreamCorruptedException(
"Failed ("
+ e.getClass().getSimpleName()
+ ")"
+ " to parse line #"
+ lineNumber
+ " '"
+ line
+ "': "
+ e.getMessage());
}
}
if (entries == null) {
return Collections.emptyList();
} else {
return entries;
}
}
@Override
public Collection<KeyPair> loadKeyPairs(
String resourceKey, FilePasswordProvider passwordProvider, List<String> lines)
throws IOException, GeneralSecurityException {
List<String> pubLines = Collections.emptyList();
List<String> prvLines = Collections.emptyList();
String prvEncryption = null;
for (int index = 0, numLines = lines.size(); index < numLines; index++) {
String l = lines.get(index);
l = GenericUtils.trimToEmpty(l);
int pos = l.indexOf(':');
if ((pos <= 0) || (pos >= (l.length() - 1))) {
continue;
}
String hdrName = l.substring(0, pos).trim();
String hdrValue = l.substring(pos + 1).trim();
switch (hdrName) {
case ENCRYPTION_HEADER:
if (prvEncryption != null) {
throw new StreamCorruptedException("Duplicate " + hdrName + " in" + resourceKey);
}
prvEncryption = hdrValue;
break;
case PUBLIC_LINES_HEADER:
pubLines = extractDataLines(resourceKey, lines, index + 1, hdrName, hdrValue, pubLines);
index += pubLines.size();
break;
case PRIVATE_LINES_HEADER:
prvLines = extractDataLines(resourceKey, lines, index + 1, hdrName, hdrValue, prvLines);
index += prvLines.size();
break;
default: // ignored
}
}
return loadKeyPairs(resourceKey, pubLines, prvLines, prvEncryption, passwordProvider);
}
@Override
public boolean canExtractKeyPairs(String resourceKey, List<String> lines)
throws IOException, GeneralSecurityException {
if (!PuttyKeyPairResourceParser.super.canExtractKeyPairs(resourceKey, lines)) {
return false;
}
for (String l : lines) {
l = GenericUtils.trimToEmpty(l);
if (!l.startsWith(KEY_FILE_HEADER_PREFIX)) {
continue;
}
int pos = l.indexOf(':');
if ((pos <= 0) || (pos >= (l.length() - 1))) {
return false;
}
String typeValue = l.substring(pos + 1).trim();
return Objects.equals(getKeyType(), typeValue);
}
return false;
}