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SSH
Reference Manual
Version 2.1.7

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Table of Contents

- SSH (App)
- ssh
  - Top of manual page
  - close/1
  - connect/3
  - connect/4
  - connection_info/2
  - daemon/1
  - daemon/2
  - daemon/3
  - shell/1
  - shell/2
  - shell/3
  - start/0
  - start/1
  - stop/0
  - stop_daemon/1
  - stop_daemon/2
  - stop_listener/1
  - stop_listener/2
- ssh_channel
  - Top of manual page
  - call/2
  - call/3
  - cast/2
  - enter_loop/1
  - init/1
  - reply/2
  - start/4
  - start_link/4
  - Module:code_change/3
  - Module:init/1
  - Module:handle_call/3
  - Module:handle_cast/2
  - Module:handle_msg/2
  - Module:handle_ssh_msg/2
  - Module:terminate/2
- ssh_connection
  - Top of manual page
  - adjust_window/3
  - close/2
  - exec/4
  - exit_status/3
  - reply_request/4
  - send/3
  - send/4
  - send/4
  - send/5
  - send_eof/2
  - session_channel/2
  - session_channel/4
  - setenv/5
  - shell/2
  - subsystem/4
- ssh_client_key_api
  - Top of manual page
  - Module:add_host_key/3
  - Module:is_host_key/4
  - Module:user_key/2
- ssh_server_key_api
  - Top of manual page
  - Module:host_key/2
  - Module:is_auth_key/3
- ssh_sftp
  - Top of manual page
  - start_channel/1
  - start_channel/2
  - start_channel/2
  - start_channel/3
  - stop_channel/1
  - read_file/2
  - read_file/3
  - write_file/3
  - write_file/4
  - list_dir/2
  - list_dir/3
  - open/3
  - open/4
  - opendir/2
  - opendir/3
  - close/2
  - close/3
  - read/3
  - read/4
  - pread/4
  - pread/5
  - aread/3
  - apread/4
  - write/3
  - write/4
  - pwrite/4
  - pwrite/5
  - awrite/3
  - apwrite/4
  - position/3
  - position/4
  - read_file_info/2
  - read_file_info/3
  - read_link_info/2
  - read_link_info/3
  - write_file_info/3
  - write_file_info/4
  - read_link/2
  - read_link/3
  - make_symlink/3
  - make_symlink/4
  - rename/3
  - rename/4
  - delete/2
  - delete/3
  - make_dir/2
  - make_dir/3
  - del_dir/2
  - del_dir/3
- ssh_sftpd
  - Top of manual page
  - subsystem_spec/1

# ssh_server_key_api

### MODULE

ssh_server_key_api

### MODULE SUMMARY

-behaviour(ssh_server_key_api).

### DESCRIPTION

Behaviour describing the API for an SSH server's public key handling.By implementing the callbacks defined in this behavior it is possible to customize the SSH server's public key handling. By default the SSH application implements this behavior with help of the standard openssh files, see ssh(6).

### DATA TYPES

Type definitions that are used more than once in this module and/or abstractions to indicate the intended use of the data type:

boolean() = true | false

string() = [byte()]

public_key() = #'RSAPublicKey'{}| {integer(), #'Dss-Parms'{}}| term()

private_key() = #'RSAPublicKey'{}| {integer(), #'Dss-Parms'{}}| term()

public_key_algorithm() = 'ssh-rsa'| 'ssh-dss' | atom()

### EXPORTS

Module:host_key(Algorithm, DaemonOptions) -> {ok, Key} | {error, Reason}

Types:

Algorithm = public_key_algorithm()
Host key algorithm. Should support 'ssh-rsa'| 'ssh-dss' but additional algorithms can be handled.
DaemonOptions = proplists:proplist()
Options provided to ssh:daemon/[2,3]
Key = private_key()
The private key of the host matching the Algorithm
Reason = term()

Fetches the hosts private key

Module:is_auth_key(Key, User, DaemonOptions) -> Result

Types:

Key = public_key()
Normally an RSA or DSA public key but handling of other public keys can be added
User = string()
The user owning the public key
DaemonOptions = proplists:proplist()
Options provided to ssh:daemon/[2,3]
Result = boolean()

Checks if the user key is authorized