1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
use std::kinds::marker;
use std::mem;
use std::raw as stdraw;
use std::str;
use {raw, Session, Error};
/// A structure representing a connection to an SSH agent.
///
/// Agents can be used to authenticate a session.
pub struct Agent<'a> {
raw: *mut raw::LIBSSH2_AGENT,
sess: &'a Session,
marker: marker::NoSync,
}
/// An iterator over the identities found in an SSH agent.
pub struct Identities<'a> {
prev: *mut raw::libssh2_agent_publickey,
agent: &'a Agent<'a>,
}
/// A public key which is extracted from an SSH agent.
pub struct PublicKey<'a> {
raw: *mut raw::libssh2_agent_publickey,
marker1: marker::NoSync,
marker2: marker::NoSend,
marker3: marker::ContravariantLifetime<'a>,
marker4: marker::NoCopy,
}
impl<'a> Agent<'a> {
/// Wraps a raw pointer in a new Agent structure tied to the lifetime of the
/// given session.
///
/// This consumes ownership of `raw`.
pub unsafe fn from_raw(sess: &Session,
raw: *mut raw::LIBSSH2_AGENT) -> Agent {
Agent {
raw: raw,
sess: sess,
marker: marker::NoSync,
}
}
/// Connect to an ssh-agent running on the system.
pub fn connect(&mut self) -> Result<(), Error> {
unsafe { self.sess.rc(raw::libssh2_agent_connect(self.raw)) }
}
/// Close a connection to an ssh-agent.
pub fn disconnect(&mut self) -> Result<(), Error> {
unsafe { self.sess.rc(raw::libssh2_agent_disconnect(self.raw)) }
}
/// Request an ssh-agent to list of public keys, and stores them in the
/// internal collection of the handle.
///
/// Call `identities` to get the public keys.
pub fn list_identities(&mut self) -> Result<(), Error> {
unsafe { self.sess.rc(raw::libssh2_agent_list_identities(self.raw)) }
}
/// Get an iterator over the identities of this agent.
pub fn identities(&self) -> Identities {
Identities { prev: 0 as *mut _, agent: self }
}
/// Attempt public key authentication with the help of ssh-agent.
pub fn userauth(&self, username: &str, identity: &PublicKey)
-> Result<(), Error>{
let username = username.to_c_str();
unsafe {
self.sess.rc(raw::libssh2_agent_userauth(self.raw,
username.as_ptr(),
identity.raw))
}
}
}
#[unsafe_destructor]
impl<'a> Drop for Agent<'a> {
fn drop(&mut self) {
unsafe { raw::libssh2_agent_free(self.raw) }
}
}
impl<'a> Iterator<Result<PublicKey<'a>, Error>> for Identities<'a> {
fn next(&mut self) -> Option<Result<PublicKey<'a>, Error>> {
unsafe {
let mut next = 0 as *mut _;
match raw::libssh2_agent_get_identity(self.agent.raw,
&mut next,
self.prev) {
0 => { self.prev = next; Some(Ok(PublicKey::from_raw(next))) }
1 => None,
rc => Some(Err(self.agent.sess.rc(rc).err().unwrap())),
}
}
}
}
impl<'a> PublicKey<'a> {
/// Creates a new public key from its raw counterpart.
///
/// Unsafe because the validity of `raw` cannot be guaranteed and there are
/// no restrictions on the lifetime returned.
pub unsafe fn from_raw<'a>(raw: *mut raw::libssh2_agent_publickey)
-> PublicKey<'a> {
PublicKey {
raw: raw,
marker1: marker::NoSync,
marker2: marker::NoSend,
marker3: marker::ContravariantLifetime,
marker4: marker::NoCopy,
}
}
/// Return the data of this public key.
pub fn blob(&self) -> &[u8] {
unsafe {
mem::transmute(stdraw::Slice {
data: (*self.raw).blob as *const u8,
len: (*self.raw).blob_len as uint,
})
}
}
/// Returns the comment in a printable format
pub fn comment(&self) -> &str {
unsafe {
str::from_utf8(::opt_bytes(self, (*self.raw).comment).unwrap())
.unwrap()
}
}
/// Gain access to the underlying raw pointer
pub fn raw(&self) -> *mut raw::libssh2_agent_publickey { self.raw }
}
|
