Add an authorized publickey

# ssh2_publickey_add

(PECL ssh2 >= 0.10)

ssh2_publickey_add — Add an authorized publickey

### Description

ssh2_publickey_add(
resource `$pkey`,
string `$algoname`,
string `$blob`,
bool `$overwrite` = `false`,
array `$attributes` = ?
): bool

> Note: The public key subsystem is used for managing public keys on a server to which the client is already authenticated. To authenticate to a remote system using public key authentication, use the ssh2_auth_pubkey_file() function instead.

### Parameters

`pkey`
  Publickey Subsystem resource created by ssh2_publickey_init().
`algoname`
  Publickey algorithm (e.g.): ssh-dss, ssh-rsa
`blob`
  Publickey blob as raw binary data
`overwrite`
  If the specified key already exists, should it be overwritten?
`attributes`
  Associative array of attributes to assign to this public key. Refer to ietf-secsh-publickey-subsystem for a list of supported attributes. To mark an attribute as mandatory, precede its name with an asterisk. If the server is unable to support an attribute marked mandatory, it will abort the add process.

### Return Values

Returns `true` on success or `false` on failure.

### Examples

Example #1 Adding a publickey with ssh2_publickey_add()

`<?php
$ssh2 = ssh2_connect('shell.example.com', 22);
ssh2_auth_password($ssh2, 'jdoe', 'password');
$pkey = ssh2_publickey_init($ssh2);
$keyblob = base64_decode('
AAAAB3NzaC1yc2EAAAABIwAAAIEA5HVt6VqSGd5PTrLRdjNONxXH1tVFGn0
Bd26BF0aCP9qyJRlvdJ3j4WBeX4ZmrveGrjMgkseSYc4xZ26sDHwfL351xj
zaLpipu\BGRrw17mWVBhuCExo476ri5tQFzbTc54VEHYckxQ16CjSTibI5X
69GmnYC9PNqEYq/1TP+HF10=');
ssh2_publickey_add($pkey, 'ssh-rsa', $keyblob, false, array('comment'=>"John's Key"));
?>`

### See Also

- ssh2_publickey_init() - Initialize Publickey subsystem
- ssh2_publickey_remove() - Remove an authorized publickey
- ssh2_publickey_list() - List currently authorized publickeys

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