Method start

java/com/jcraft/jsch/UserAuthPublicKey.java:36–233

(Session session)

class UserAuthPublicKey extends UserAuth{

  public boolean start(Session session) throws Exception{
    super.start(session);

    Vector identities=session.getIdentityRepository().getIdentities();

    byte[] passphrase=null;
    byte[] _username=null;

    int command;

    synchronized(identities){
      if(identities.size()<=0){
        return false;
      }

      _username=Util.str2byte(username);

      for(int i=0; i<identities.size(); i++){

        if(session.auth_failures >= session.max_auth_tries){
          return false;
        }

        Identity identity=(Identity)(identities.elementAt(i));
        byte[] pubkeyblob=identity.getPublicKeyBlob();

        if(pubkeyblob!=null){
          // send
          // byte      SSH_MSG_USERAUTH_REQUEST(50)
          // string    user name
          // string    service name ("ssh-connection")
          // string    "publickey"
          // boolen    FALSE
          // string    public key algorithm name
          // string    public key blob
          packet.reset();
          buf.putByte((byte)SSH_MSG_USERAUTH_REQUEST);
          buf.putString(_username);
          buf.putString(Util.str2byte("ssh-connection"));
          buf.putString(Util.str2byte("publickey"));
          buf.putByte((byte)0);
          buf.putString(Util.str2byte(identity.getAlgName()));
          buf.putString(pubkeyblob);
          session.write(packet);

          loop1:
          while(true){
            buf=session.read(buf);
            command=buf.getCommand()&0xff;

            if(command==SSH_MSG_USERAUTH_PK_OK){
              break;
            }
            else if(command==SSH_MSG_USERAUTH_FAILURE){
              break;
            }
            else if(command==SSH_MSG_USERAUTH_BANNER){
              buf.getInt(); buf.getByte(); buf.getByte();