https://mina.apache.org/sshd-project/downloads.html

The typical ELB health-checks:

2023-05-15 18:27:48,047 INFO org.javastack.sftpserver.ServiceLogger session created(@10.x.x.xx:37118)
2023-05-15 18:27:48,047 INFO org.javastack.sftpserver.ServiceLogger session closed(@10.x.x.xx:37118)
2023-05-15 18:27:48,063 INFO org.javastack.sftpserver.ServiceLogger session created(@10.x.x.xx:37114)
2023-05-15 18:27:48,063 INFO org.javastack.sftpserver.ServiceLogger session closed(@10.x.x.xx:37114)
2023-05-15 18:27:48,548 INFO org.javastack.sftpserver.ServiceLogger session created(@10.x.x.xx:9088)
2023-05-15 18:27:48,548 INFO org.javastack.sftpserver.ServiceLogger session closed(@10.x.x.xx:9088)
...and many many more

http://www.bouncycastle.org/jira/browse/BJA/fixforversion/10200/?selectedTab=com.atlassian.jira.jira-projects-plugin:version-summary-panel

http://www.bouncycastle.org/latest_releases.html

I just downloaded zip archive and expanded in my work folder. Tried to run sftp server sample config on Linux Mint 20 and I am getting error. Any Ideas what may be the problem?

~/work/sftpserver$ sudo ./bin/sftpd.sh run sampleconf
./bin/sftpd.sh: line 24: cd: /opt/sftpd: No such file or directory
[0.003s][warning][gc] -XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.
-XX:G1ConcRefinementThreads=2 -XX:GCDrainStackTargetSize=64 -XX:InitialHeapSize=64220672 -XX:MaxHeapSize=67108864 -XX:+PrintCommandLineFlags -XX:-PrintFlagsFinal -XX:+PrintGCDetails -XX:ReservedCodeCacheSize=251658240 -XX:+SegmentedCodeCache -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseG1GC
[0.007s][info ][gc,heap] Heap region size: 1M
[0.008s][info ][gc ] Using G1
[0.008s][info ][gc,heap,coops] Heap address: 0x00000000fc000000, size: 64 MB, Compressed Oops mode: 32-bit
[0.009s][info ][gc,cds ] Mark closed archive regions in map: [0x00000000fff00000, 0x00000000fff6aff8]
[0.009s][info ][gc,cds ] Mark open archive regions in map: [0x00000000ffe00000, 0x00000000ffe46ff8]
openjdk version "11.0.19" 2023-04-18
OpenJDK Runtime Environment (build 11.0.19+7-post-Ubuntu-0ubuntu120.04.1)
OpenJDK 64-Bit Server VM (build 11.0.19+7-post-Ubuntu-0ubuntu120.04.1, mixed mode, sharing)
Error: Could not find or load main class org.javastack.sftpserver.Server
Caused by: java.lang.ClassNotFoundException: org.javastack.sftpserver.Server
[0,074s][info ][gc,heap,exit ] Heap
[0,074s][info ][gc,heap,exit ] garbage-first heap total 65536K, used 712K [0x00000000fc000000, 0x0000000100000000)
[0,074s][info ][gc,heap,exit ] region size 1024K, 1 young (1024K), 0 survivors (0K)
[0,074s][info ][gc,heap,exit ] Metaspace used 462K, capacity 4539K, committed 4864K, reserved 1056768K
[0,074s][info ][gc,heap,exit ] class space used 45K, capacity 405K, committed 512K, reserved 1048576K

• Apache MINA SSHD 2.9.2

I have some errors when I try to compile with sshd 1.0.0 instead of 0.14.0

http://mvnrepository.com/artifact/org.apache.sshd/sshd-core/1.0.0

To reproduce :

replace 0.14.0 by 1.0.0 in pom.xml

Sample:

user1:$apr1$r31.....$HqJZimcKQFAMYayBlzkrA/
user2:$apr1$a62.....$PJ6r7SD86d3r4kjtDDbhZ

Format: htpasswd apr1

https://mina.apache.org/sshd-project/downloads.html

My project is build on Java 1.6. Can I integrate this sftpserver in my project? Is it easy for me to implement an sftpserver based on Java1.6 according to your project?

Starting the default server with default config aborts the server with this error:

2017-10-17 18:59:02,061 INFO org.javastack.sftpserver.Server Starting
2017-10-17 18:59:02,062 INFO org.javastack.sftpserver.Server Config file loaded 6 lines
2017-10-17 18:59:02,269 INFO org.apache.sshd.common.util.SecurityUtils Trying to register BouncyCastle as a JCE provider
2017-10-17 18:59:02,391 INFO org.apache.sshd.common.util.SecurityUtils Registration succeeded
2017-10-17 18:59:02,434 INFO org.javastack.sftpserver.Server SSHD SSHD-CORE-1.2.0
2017-10-17 18:59:02,447 INFO org.javastack.sftpserver.Server Listen on port=22222
2017-10-17 18:59:02,454 ERROR org.javastack.sftpserver.Server Exception java.security.AccessControlException: access denied ("java.util.PropertyPermission" "*" "read,write")
java.security.AccessControlException: access denied ("java.util.PropertyPermission" "*" "read,write")
        at java.security.AccessControlContext.checkPermission(AccessControlContext.java:472)
        at java.security.AccessController.checkPermission(AccessController.java:884)
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
        at java.lang.SecurityManager.checkPropertiesAccess(SecurityManager.java:1262)
        at java.lang.System.getProperties(System.java:630)
        at org.apache.sshd.common.SyspropsMapWrapper.keySet(SyspropsMapWrapper.java:137)
        at org.apache.sshd.common.SyspropsMapWrapper.isEmpty(SyspropsMapWrapper.java:132)
        at org.apache.sshd.common.util.GenericUtils.isEmpty(GenericUtils.java:233)
        at org.apache.sshd.common.PropertyResolverUtils.resolvePropertyValue(PropertyResolverUtils.java:315)
        at org.apache.sshd.common.PropertyResolverUtils.getIntProperty(PropertyResolverUtils.java:148)
        at org.apache.sshd.common.io.AbstractIoServiceFactory.getNioWorkers(AbstractIoServiceFactory.java:84)
        at org.apache.sshd.common.io.nio2.Nio2ServiceFactory.<init>(Nio2ServiceFactory.java:42)
        at org.apache.sshd.common.io.nio2.Nio2ServiceFactoryFactory.create(Nio2ServiceFactoryFactory.java:54)
        at org.apache.sshd.common.io.DefaultIoServiceFactoryFactory.create(DefaultIoServiceFactoryFactory.java:49)
        at org.apache.sshd.common.helpers.AbstractFactoryManager.getIoServiceFactory(AbstractFactoryManager.java:101)
        at org.apache.sshd.server.SshServer.createAcceptor(SshServer.java:401)
        at org.apache.sshd.server.SshServer.start(SshServer.java:301)
        at org.javastack.sftpserver.Server.start(Server.java:245)
        at org.javastack.sftpserver.Server.main(Server.java:89)

Adding this line to lib/sftpd.policy solves the problem
permission java.util.PropertyPermission "*", "read,write";

Hi Mr Grandes,
I was trying to use you sftp server in my personal project, when I try to login the server via Winscp I got server's host key did not match the signature supplied warning. Do you by any chance know what happens? Any suggestions are appreciated.

Currently the default implementation generates a host key with ssh-dss key type.
Most ssh clients don't any longer support the ssh-dss type, better would be to generate the server key with a ssh-rsa or better key.

There the corresponding log entry when trying to connect with open ssh client 7.4 distributed with Debian 9

2017-10-17 18:38:29,707 WARN org.apache.sshd.server.session.ServerSessionImpl exceptionCaught(ServerSessionImpl[null@/0:0:0:0:0:0:0:1:56314])[state=Opened] IllegalStateException: Unable to negotiate key exc
hange for server host key algorithms (client: [email protected],[email protected],[email protected],[email protected],ssh-
[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa / server: ssh-dss)

Here the openssh page mentioning this:
[https://www.openssh.com/legacy.html]

OpenSSH 7.0 and greater similarly disable the ssh-dss (DSA) public key algorithm. It too is weak and we recommend against its use.

download file, it have a EOF Exception . it run in windows 7 environment， jdk 1.8 .

Server$CustomSftpSubsystemFactory$1:3292 - doSendStatus(ServerSessionImpl[test@/127.0.0.1:55462])[id=383] SSH_FXP_STATUS (substatus=SSH_FX_EOF, lang=, msg=java.io.EOFException: Unable to read 16384 bytes from offset=12340403 of 7b6d575567751ee2088f69f846ae28e6)

Hi,

I downloaded the latest release and played around with sftpd.sh start or pwd. I don't manage to get it running. Somethings is not right. I seems to look for files in /opt/sftpd/... and then fails.

Maybe there is a step-by-step guide showing how it is done?

http://www.bouncycastle.org/latest_releases.html

Like linux passwd/shadow with salted-sha256 (org.apache.commons.codec.digest.Sha2Crypt)

• SHA2-512
• SHA2-256
• MD5-128
• APR1 (Apache Portable Runtime)

Unix SHA-crypt

$<ID>$<SALT>$<PWD>