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could not connect to my Huawei switch. #89

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zhanglinqiang opened this issue Oct 29, 2021 · 4 comments
Closed

could not connect to my Huawei switch. #89

zhanglinqiang opened this issue Oct 29, 2021 · 4 comments

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@zhanglinqiang
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zhanglinqiang commented Oct 29, 2021 •
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Hello, I can't connect to my switch after migrating ganymed-ssh2 to jsch(Session.connect: java.security.SignatureException: Could not verify signature). Other ssh service like Ubuntu, Centos working well. Can anyone help?
using ganymed-ssh2 and linux ssh command worked.
jsch version:

       <dependency>

            <groupId>com.github.mwiede</groupId>

            <artifactId>jsch</artifactId>

            <version>0.1.69</version>

        </dependency>

Here is my session config code:

Properties p = new Properties();
        String rawkex = session.getConfig("kex");
        String extendKex = "diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1";
        String finalKex = Stream.concat(Arrays.stream(rawkex.split(",")), Arrays.stream(extendKex.split(",")))
                .distinct()
                .collect(Collectors.joining(","));
        p.setProperty("kex", finalKex);

        String serverHostKey = session.getConfig("server_host_key");
        //enable ssh-dss
        p.setProperty("server_host_key", serverHostKey + ",ssh-dss");
        p.setProperty("StrictHostKeyChecking", "no");
        p.setProperty("PreferredAuthentications", "password,keyboard-interactive");
        //Solaris
        p.setProperty("dhgex_preferred", "1024");
        p.setProperty("dhgex_min", "1024");

Java version:

openjdk version "1.8.0_302"
OpenJDK Runtime Environment (build 1.8.0_302-b08)
OpenJDK 64-Bit Server VM (build 25.302-b08, mixed mode)

Stacktrace:

com.jcraft.jsch.JSchException: Session.connect: java.security.SignatureException: Could not verify signature
	at com.jcraft.jsch.Session.connect(Session.java:570)
	at com.topsec.tap.collector.agent.connection.JschConnection.initializeOpen(JschConnection.java:186)
	at com.topsec.tap.collector.agent.connection.JschConnection.open(JschConnection.java:116)
	at com.topsec.tap.collector.agent.connection.JschConnection.main(JschConnection.java:730)
Caused by: java.security.SignatureException: Could not verify signature
	at sun.security.ec.ECDSASignature.engineVerify(ECDSASignature.java:413)
	at java.security.Signature$Delegate.engineVerify(Signature.java:1394)
	at java.security.Signature.verify(Signature.java:771)
	at com.jcraft.jsch.jce.SignatureECDSAN.verify(SignatureECDSAN.java:175)
	at com.jcraft.jsch.KeyExchange.verify(KeyExchange.java:346)
	at com.jcraft.jsch.DHGEX.next(DHGEX.java:224)
	at com.jcraft.jsch.Session.connect(Session.java:331)
	... 3 more
Caused by: java.security.SignatureException: Invalid encoding for signature
	at sun.security.util.ECUtil.decodeSignature(ECUtil.java:258)
	at sun.security.ec.ECDSASignature.engineVerify(ECDSASignature.java:409)
	... 9 more
Caused by: java.io.IOException: Invalid encoding: redundant leading 0s
	at sun.security.util.DerInputBuffer.getBigInteger(DerInputBuffer.java:161)
	at sun.security.util.DerValue.getPositiveBigInteger(DerValue.java:559)
	at sun.security.util.ECUtil.decodeSignature(ECUtil.java:242)
	... 10 more

ssh server information using ssh -vvv :

OpenSSH_8.2p1 Ubuntu-4ubuntu0.3, OpenSSL 1.1.1f  31 Mar 2020
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug3: kex names ok: [diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1]
debug2: resolve_canonicalize: hostname 10.8.20.100 is address
debug2: ssh_connect_direct
debug1: Connecting to 10.8.20.100 [10.8.20.100] port 22.
debug1: Connection established.
debug1: identity file /home/leen/.ssh/id_rsa type 0
debug1: identity file /home/leen/.ssh/id_rsa-cert type -1
debug1: identity file /home/leen/.ssh/id_dsa type -1
debug1: identity file /home/leen/.ssh/id_dsa-cert type -1
debug1: identity file /home/leen/.ssh/id_ecdsa type -1
debug1: identity file /home/leen/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/leen/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/leen/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/leen/.ssh/id_ed25519 type -1
debug1: identity file /home/leen/.ssh/id_ed25519-cert type -1
debug1: identity file /home/leen/.ssh/id_ed25519_sk type -1
debug1: identity file /home/leen/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/leen/.ssh/id_xmss type -1
debug1: identity file /home/leen/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.3
debug1: Remote protocol version 2.0, remote software version -
debug1: no match: -
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 10.8.20.100:22 as 'admin2'
debug3: hostkeys_foreach: reading file "/home/leen/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/leen/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from 10.8.20.100
debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,ext-info-c
debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com,ssh-ed25519,sk-ssh-ed25519@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ssh-dss
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib@openssh.com,zlib
debug2: compression stoc: none,zlib@openssh.com,zlib
debug2: languages ctos: 
debug2: languages stoc: 
debug2: first_kex_follows 0 
debug2: reserved 0 
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1
debug2: host key algorithms: ecdsa-sha2-nistp521,ssh-dss,ssh-rsa
debug2: ciphers ctos: aes256-ctr,aes128-ctr,aes256-cbc,aes128-cbc,3des-cbc
debug2: ciphers stoc: aes256-ctr,aes128-ctr,aes256-cbc,aes128-cbc,3des-cbc
debug2: MACs ctos: hmac-sha2-256,hmac-sha2-256-96,hmac-sha1,hmac-sha1-96,hmac-md5,hmac-md5-96
debug2: MACs stoc: hmac-sha2-256,hmac-sha2-256-96,hmac-sha1,hmac-sha1-96,hmac-md5,hmac-md5-96
debug2: compression ctos: none,zlib
debug2: compression stoc: none,zlib
debug2: languages ctos: 
debug2: languages stoc: 
debug2: first_kex_follows 0 
debug2: reserved 0 
debug1: kex: algorithm: diffie-hellman-group-exchange-sha1
debug1: kex: host key algorithm: ecdsa-sha2-nistp521
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha2-256 compression: none
debug3: send packet: type 34
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048<8192<8192) sent
debug3: receive packet: type 31
debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
debug2: bits set: 2049/4096
debug3: send packet: type 32
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug3: receive packet: type 33
debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: ecdsa-sha2-nistp521 SHA256:RJpTh5BR8X+DWEK6+otU4KD3STSHpBy4zs5YEPNEI1Y
debug3: hostkeys_foreach: reading file "/home/leen/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/leen/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from 10.8.20.100
debug1: Host '10.8.20.100' is known and matches the ECDSA host key.
debug1: Found key in /home/leen/.ssh/known_hosts:1
debug2: bits set: 2045/4096
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey out after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey in after 4294967296 blocks
debug1: Will attempt key: /home/leen/.ssh/id_rsa RSA SHA256:Prg2XpliU/m8Hnk6gwyLgL0fr+/r6F1LN0AByCyVHOo agent
debug1: Will attempt key: /home/leen/.ssh/id_dsa 
debug1: Will attempt key: /home/leen/.ssh/id_ecdsa 
debug1: Will attempt key: /home/leen/.ssh/id_ecdsa_sk 
debug1: Will attempt key: /home/leen/.ssh/id_ed25519 
debug1: Will attempt key: /home/leen/.ssh/id_ed25519_sk 
debug1: Will attempt key: /home/leen/.ssh/id_xmss 
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /home/leen/.ssh/id_rsa RSA SHA256:Prg2XpliU/m8Hnk6gwyLgL0fr+/r6F1LN0AByCyVHOo agent
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: password
debug3: start over, passed a different list password
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup password
debug3: remaining preferred: ,keyboard-interactive,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
@zhanglinqiang
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I found that the error is in ECUtil.decodeSignature(byte[]), the DerValue array returned by DerInputStream reports an error when calling getPositiveBigInteger(), the data available in DerValue is 0

norrisjeremy referenced this issue in norrisjeremy/jsch Oct 30, 2021
@norrisjeremy
#89 fix rare ECDSA signature validation issue.
c10fc00
@norrisjeremy norrisjeremy mentioned this issue Oct 30, 2021
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@norrisjeremy
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Hi @zhanglinqiang,

Would you be able to test whether the changes in #90 fix the issue you are seeing?

Thanks,
Jeremy

@zhanglinqiang
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Hi @zhanglinqiang,

Would you be able to test whether the changes in #90 fix the issue you are seeing?

Thanks, Jeremy
Amazing! Your changes in #90 solved my problem. Thank you very much for your support.

@norrisjeremy
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Hi @zhanglinqiang,

I believe this issue should be resolved in the 0.1.70 release.

Thanks,
Jeremy

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