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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
//! Contexts and errors.
//!
//! Sequoia tries to be useful for a wide variety of applications.
//! Therefore, we need you to provide a little information about the
//! context you are using Sequoia in.
//!
//! # Example
//!
//! A context with reasonable defaults can be created using
//! `sq_context_new`:
//!
//! ```text
//! sq_context_t ctx;
//!
//! ctx = sq_context_new ("org.sequoia-pgp.example");
//! ```
//!
//! A context can be configured using the builder pattern with
//! `sq_context_configure`:
//!
//! ```text
//! sq_config_t cfg;
//! sq_context_t ctx;
//!
//! cfg = sq_context_configure ("org.sequoia-pgp.example");
//! sq_config_network_policy (cfg, SQ_NETWORK_POLICY_OFFLINE);
//! ctx = sq_config_build (cfg);
//! ```
use failure;
use std::ffi::{CString, CStr};
use std::ptr;
use libc::{uint8_t, c_char};
use sequoia_core as core;
use sequoia_core::Config;
/// Wraps a Context and provides an error slot.
#[doc(hidden)]
pub struct Context {
pub(crate) c: core::Context,
pub(crate) e: Option<Box<failure::Error>>,
}
impl Context {
fn new(c: core::Context) -> Self {
Context{c: c, e: None}
}
}
/// Returns the last error message.
///
/// The returned value must be freed with `sq_string_free`.
#[no_mangle]
pub extern "system" fn sq_last_strerror(ctx: Option<&Context>)
-> *mut c_char {
let ctx = ctx.expect("Context is NULL");
match ctx.e {
Some(ref e) =>
CString::new(format!("{}", e))
.map(|s| s.into_raw())
.unwrap_or(CString::new("Failed to convert error into string")
.unwrap().into_raw()),
None => ptr::null_mut(),
}
}
/// Frees a string returned from Sequoia.
#[no_mangle]
pub extern "system" fn sq_string_free(s: *mut c_char) {
if ! s.is_null() {
unsafe { drop(CString::from_raw(s)) }
}
}
/// Creates a Context with reasonable defaults.
///
/// `domain` should uniquely identify your application, it is strongly
/// suggested to use a reversed fully qualified domain name that is
/// associated with your application. `domain` must not be `NULL`.
///
/// Returns `NULL` on errors.
#[no_mangle]
pub extern "system" fn sq_context_new(domain: *const c_char)
-> *mut Context {
assert!(! domain.is_null());
let domain = unsafe {
CStr::from_ptr(domain).to_string_lossy()
};
if let Ok(context) = core::Context::new(&domain) {
Box::into_raw(Box::new(Context::new(context)))
} else {
ptr::null_mut()
}
}
/// Frees a context.
#[no_mangle]
pub extern "system" fn sq_context_free(context: *mut Context) {
unsafe {
drop(Box::from_raw(context));
}
}
/// Creates a Context that can be configured.
///
/// `domain` should uniquely identify your application, it is strongly
/// suggested to use a reversed fully qualified domain name that is
/// associated with your application. `domain` must not be `NULL`.
///
/// The configuration is seeded like in `sq_context_new`, but can be
/// modified. A configuration has to be finalized using
/// `sq_config_build()` in order to turn it into a Context.
#[no_mangle]
pub extern "system" fn sq_context_configure(domain: *const c_char)
-> *mut Config {
assert!(! domain.is_null());
let domain = unsafe {
CStr::from_ptr(domain).to_string_lossy()
};
Box::into_raw(Box::new(core::Context::configure(&domain)))
}
/// Returns the domain of the context.
#[no_mangle]
pub extern "system" fn sq_context_domain(ctx: Option<&Context>) -> *const c_char {
assert!(ctx.is_some());
ctx.unwrap().c.domain().as_bytes().as_ptr() as *const c_char
}
/// Returns the directory containing shared state.
#[no_mangle]
pub extern "system" fn sq_context_home(ctx: Option<&Context>) -> *const c_char {
assert!(ctx.is_some());
ctx.unwrap().c.home().to_string_lossy().as_ptr() as *const c_char
}
/// Returns the directory containing backend servers.
#[no_mangle]
pub extern "system" fn sq_context_lib(ctx: Option<&Context>) -> *const c_char {
assert!(ctx.is_some());
ctx.unwrap().c.lib().to_string_lossy().as_bytes().as_ptr() as *const c_char
}
/// Returns the network policy.
#[no_mangle]
pub extern "system" fn sq_context_network_policy(ctx: Option<&Context>) -> uint8_t {
assert!(ctx.is_some());
ctx.unwrap().c.network_policy().into()
}
/// Returns the IPC policy.
#[no_mangle]
pub extern "system" fn sq_context_ipc_policy(ctx: Option<&Context>) -> uint8_t {
assert!(ctx.is_some());
ctx.unwrap().c.ipc_policy().into()
}
/// Returns whether or not this is an ephemeral context.
#[no_mangle]
pub extern "system" fn sq_context_ephemeral(ctx: Option<&Context>) -> uint8_t {
assert!(ctx.is_some());
if ctx.unwrap().c.ephemeral() { 1 } else { 0 }
}
/* sequoia::Config. */
/// Finalizes the configuration and return a `Context`.
///
/// Consumes `cfg`. Returns `NULL` on errors.
#[no_mangle]
pub extern "system" fn sq_config_build(cfg: Option<&mut Config>)
-> *mut Context {
assert!(cfg.is_some());
let cfg = unsafe { Box::from_raw(cfg.unwrap()) };
if let Ok(context) = cfg.build() {
Box::into_raw(Box::new(Context::new(context)))
} else {
ptr::null_mut()
}
}
/// Sets the directory containing shared state.
#[no_mangle]
pub extern "system" fn sq_config_home(cfg: Option<&mut Config>,
home: *const c_char) {
assert!(cfg.is_some());
assert!(! home.is_null());
let home = unsafe {
CStr::from_ptr(home).to_string_lossy()
};
cfg.unwrap().set_home(home.as_ref())
}
/// Set the directory containing backend servers.
#[no_mangle]
pub extern "system" fn sq_config_lib(cfg: Option<&mut Config>,
lib: *const c_char) {
assert!(cfg.is_some());
assert!(! lib.is_null());
let lib = unsafe {
CStr::from_ptr(lib).to_string_lossy()
};
cfg.unwrap().set_lib(&lib.as_ref())
}
/// Sets the network policy.
#[no_mangle]
pub extern "system" fn sq_config_network_policy(cfg: Option<&mut Config>,
policy: uint8_t) {
assert!(cfg.is_some());
cfg.unwrap().set_network_policy(policy.into());
}
/// Sets the IPC policy.
#[no_mangle]
pub extern "system" fn sq_config_ipc_policy(cfg: Option<&mut Config>,
policy: uint8_t) {
assert!(cfg.is_some());
cfg.unwrap().set_ipc_policy(policy.into());
}
/// Makes this context ephemeral.
#[no_mangle]
pub extern "system" fn sq_config_ephemeral(cfg: Option<&mut Config>) {
assert!(cfg.is_some());
cfg.unwrap().set_ephemeral();
}
|
