Golang sFTP SSH：身份验证失败

For 3 days, I have been trying to set up a sFTP connection to upload a file to a client server.

Only difference being that I added :

sshConfig := &ssh.ClientConfig{
    User: "0000003579",
    Auth: []ssh.AuthMethod{
        //SSHAgent(),
        PublicKeyFile("C:\\GoDev\\src\\Texel.ca\\Bnc_Ftp\\.ssh\\id_rsa"),
    },
    HostKeyCallback:   ssh.InsecureIgnoreHostKey(),
    HostKeyAlgorithms: []string{"ssh-dss"},
}
sshConfig.Ciphers = append(sshConfig.Ciphers, "aes128-cbc")

because my client server still use cbc and still use ssh-dss.

My issue :

When trying to connect, I get the following response:

Failed to dial: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain

I tried to connect with the same credential via openSSH in a command line

ssh -oHostKeyAlgorithms=+ssh-dss ***@2XXX.XXX.XXX.XX -vvv

and it works.

Can I get more infos on my error like the -vvv command with openSSH? Or do any of you have an idea?

Thank you!

EDIT

Just for more information, there is a working tool right now that does the sftp transfert and it works.

But it's a .bat file that's why we are changing it to go.

It use WinSCP to connect to the sFTP with a rsa putty private key.

That might be one of the issue, as if I understand correctly, I can't use a puTTy private key with golang ssh package.

So I tried both the putty key and a conversion to openSSH, but both won't work.