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
|
use std::ffi::CString;
use std::marker;
use std::rc::Rc;
use std::slice;
use std::str;
use util::Binding;
use {raw, Error, SessionInner};
/// A structure representing a connection to an SSH agent.
///
/// Agents can be used to authenticate a session.
pub struct Agent {
raw: *mut raw::LIBSSH2_AGENT,
sess: Rc<SessionInner>,
}
/// An iterator over the identities found in an SSH agent.
pub struct Identities<'agent> {
prev: *mut raw::libssh2_agent_publickey,
agent: &'agent Agent,
}
/// A public key which is extracted from an SSH agent.
pub struct PublicKey<'agent> {
raw: *mut raw::libssh2_agent_publickey,
_marker: marker::PhantomData<&'agent [u8]>,
}
impl Agent {
pub(crate) fn from_raw_opt(
raw: *mut raw::LIBSSH2_AGENT,
sess: &Rc<SessionInner>,
) -> Result<Self, Error> {
if raw.is_null() {
Err(Error::last_error_raw(sess.raw).unwrap_or_else(Error::unknown))
} else {
Ok(Self {
raw,
sess: Rc::clone(sess),
})
}
}
/// 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 = try!(CString::new(username));
unsafe {
self.sess.rc(raw::libssh2_agent_userauth(
self.raw,
username.as_ptr(),
identity.raw,
))
}
}
}
impl Drop for Agent {
fn drop(&mut self) {
unsafe { raw::libssh2_agent_free(self.raw) }
}
}
impl<'agent> Iterator for Identities<'agent> {
type Item = Result<PublicKey<'agent>, Error>;
fn next(&mut self) -> Option<Result<PublicKey<'agent>, 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(Binding::from_raw(next)))
}
1 => None,
rc => Some(Err(self.agent.sess.rc(rc).err().unwrap())),
}
}
}
}
impl<'agent> PublicKey<'agent> {
/// Return the data of this public key.
pub fn blob(&self) -> &[u8] {
unsafe { slice::from_raw_parts_mut((*self.raw).blob, (*self.raw).blob_len as usize) }
}
/// Returns the comment in a printable format
pub fn comment(&self) -> &str {
unsafe { str::from_utf8(::opt_bytes(self, (*self.raw).comment).unwrap()).unwrap() }
}
}
impl<'agent> Binding for PublicKey<'agent> {
type Raw = *mut raw::libssh2_agent_publickey;
unsafe fn from_raw(raw: *mut raw::libssh2_agent_publickey) -> PublicKey<'agent> {
PublicKey {
raw: raw,
_marker: marker::PhantomData,
}
}
fn raw(&self) -> *mut raw::libssh2_agent_publickey {
self.raw
}
}
|
