nimantha-lakshan opened a new issue, #509:
URL: https://github.com/apache/mina-sshd/issues/509
### Version
2.12.1
### Bug description
```java
Caused by: org.apache.sshd.common.util.buffer.BufferException: Underflow:
requested=1668243314, available=39
at
org.apache.sshd.common.util.buffer.Buffer.ensureAvailable(Buffer.java:661)
~[sshd-common-2.12.1.jar:2.12.1]
at
org.apache.sshd.common.util.buffer.ByteArrayBuffer.getString(ByteArrayBuffer.java:241)
~[sshd-common-2.12.1.jar:2.12.1]
at org.apache.sshd.common.util.buffer.Buffer.getString(Buffer.java:332)
~[sshd-common-2.12.1.jar:2.12.1]
at
org.apache.sshd.sftp.client.impl.AbstractSftpClient.readAttributes(AbstractSftpClient.java:439)
~[sshd-sftp-2.12.1.jar:2.12.1]
at
org.apache.sshd.sftp.client.impl.AbstractSftpClient.checkAttributesResponse(AbstractSftpClient.java:331)
~[sshd-sftp-2.12.1.jar:2.12.1]
at
org.apache.sshd.sftp.client.impl.AbstractSftpClient.checkAttributes(AbstractSftpClient.java:325)
~[sshd-sftp-2.12.1.jar:2.12.1]
at
org.apache.sshd.sftp.client.impl.AbstractSftpClient.stat(AbstractSftpClient.java:990)
~[sshd-sftp-2.12.1.jar:2.12.1]
at
org.apache.sshd.sftp.client.fs.SftpClientDirectoryScanner.scan(SftpClientDirectoryScanner.java:125)
~[sshd-sftp-2.12.1.jar:2.12.1]
at
org.apache.sshd.sftp.client.fs.SftpClientDirectoryScanner.scan(SftpClientDirectoryScanner.java:115)
~[sshd-sftp-2.12.1.jar:2.12.1]
```
code example:
```java
private void process(String host, int port, String username, String
password, String homePath) throws IOException {
try (SshClient sshClient = SshClient.setUpDefaultClient()) {
sshClient.setServerKeyVerifier(AcceptAllServerKeyVerifier.INSTANCE);
sshClient.setHostConfigEntryResolver(HostConfigEntryResolver.EMPTY);
sshClient.setKeyIdentityProvider(KeyIdentityProvider.EMPTY_KEYS_PROVIDER);
sshClient.start();
// Connect to the SFTP server
try (ClientSession session = sshClient.connect(username, host,
port).verify(Duration.ofSeconds(30)).getSession()) {
session.addPasswordIdentity(password);
log.info("Connected to {}:{}. Authenticating...", host,
port);
var verify = session.auth().verify(Duration.ofSeconds(30));
log.info("Authentication {}", verify.isSuccess() ? "success"
: "failure");
try (SftpClient sftpClient =
SftpClientFactory.instance().createSftpClient(session)) {
var directoryScanner = new
SftpClientDirectoryScanner(homePath, "*.csv");
directoryScanner.setCaseSensitive(false);
var scan = directoryScanner.scan(sftpClient); // throws
error from here
}
}
}
}
```
### Actual behavior
SFTP client not working as expected.
I'm receiving this error
`org.apache.sshd.common.util.buffer.BufferException: Underflow:
requested=1668243314, available=39`
This happens only with some SFTP servers.
### Expected behavior
To resolve this issue
### Relevant log output
_No response_
### Other information
_No response_
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