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Commit | Line | Data |
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51b499db DM |
1 | //! Tools and utilities |
2 | //! | |
3 | //! This is a collection of small and useful tools. | |
6100071f WB |
4 | use std::any::Any; |
5 | use std::collections::HashMap; | |
62ee2eb4 | 6 | use std::hash::BuildHasher; |
98c259b4 | 7 | use std::fs::File; |
b649887e | 8 | use std::io::{self, BufRead, Read, Seek, SeekFrom}; |
98c259b4 | 9 | use std::os::unix::io::RawFd; |
6100071f | 10 | use std::path::Path; |
365bb90f | 11 | |
f7d4e4b5 | 12 | use anyhow::{bail, format_err, Error}; |
af926291 | 13 | use serde_json::Value; |
c5946faf | 14 | use openssl::hash::{hash, DigestBytes, MessageDigest}; |
8a1028e0 | 15 | use percent_encoding::AsciiSet; |
0fe5d605 | 16 | |
00ec8d16 WB |
17 | pub use proxmox::tools::fd::Fd; |
18 | ||
6100071f | 19 | pub mod acl; |
e6513bd5 | 20 | pub mod apt; |
556eb70e | 21 | pub mod async_io; |
6ed25cbe | 22 | pub mod borrow; |
ec01eead | 23 | pub mod cert; |
6100071f | 24 | pub mod daemon; |
10effc98 | 25 | pub mod disks; |
4939255f | 26 | pub mod format; |
fb01fd3a WB |
27 | pub mod fs; |
28 | pub mod fuse_loop; | |
29 | pub mod http; | |
8074d2b0 | 30 | pub mod logrotate; |
45f9b32e | 31 | pub mod loopdev; |
fb01fd3a WB |
32 | pub mod lru_cache; |
33 | pub mod nom; | |
34 | pub mod runtime; | |
97168f92 | 35 | pub mod socket; |
fb01fd3a | 36 | pub mod statistics; |
7b22fb25 | 37 | pub mod subscription; |
fb01fd3a WB |
38 | pub mod systemd; |
39 | pub mod ticket; | |
40 | pub mod xattr; | |
fdce52aa | 41 | pub mod zip; |
f1d99e3f | 42 | |
fb01fd3a WB |
43 | pub mod parallel_handler; |
44 | pub use parallel_handler::ParallelHandler; | |
3c9b3702 | 45 | |
f1d99e3f | 46 | mod wrapped_reader_stream; |
fb01fd3a | 47 | pub use wrapped_reader_stream::{AsyncReaderStream, StdChannelStream, WrappedReaderStream}; |
dcd033a5 | 48 | |
943479f5 | 49 | mod async_channel_writer; |
fb01fd3a | 50 | pub use async_channel_writer::AsyncChannelWriter; |
943479f5 | 51 | |
dcd033a5 | 52 | mod std_channel_writer; |
fb01fd3a | 53 | pub use std_channel_writer::StdChannelWriter; |
8cf6e764 | 54 | |
a650f503 | 55 | mod process_locker; |
fb01fd3a | 56 | pub use process_locker::{ProcessLocker, ProcessLockExclusiveGuard, ProcessLockSharedGuard}; |
a650f503 | 57 | |
3b151414 | 58 | mod file_logger; |
fb01fd3a | 59 | pub use file_logger::{FileLogger, FileLogOptions}; |
3b151414 | 60 | |
490be29e | 61 | mod broadcast_future; |
fb01fd3a | 62 | pub use broadcast_future::{BroadcastData, BroadcastFuture}; |
490be29e | 63 | |
fded74d0 | 64 | /// The `BufferedRead` trait provides a single function |
0a72e267 DM |
65 | /// `buffered_read`. It returns a reference to an internal buffer. The |
66 | /// purpose of this traid is to avoid unnecessary data copies. | |
fded74d0 | 67 | pub trait BufferedRead { |
318564ac DM |
68 | /// This functions tries to fill the internal buffers, then |
69 | /// returns a reference to the available data. It returns an empty | |
70 | /// buffer if `offset` points to the end of the file. | |
0a72e267 DM |
71 | fn buffered_read(&mut self, offset: u64) -> Result<&[u8], Error>; |
72 | } | |
73 | ||
f5f13ebc | 74 | pub fn json_object_to_query(data: Value) -> Result<String, Error> { |
f5f13ebc DM |
75 | let mut query = url::form_urlencoded::Serializer::new(String::new()); |
76 | ||
77 | let object = data.as_object().ok_or_else(|| { | |
78 | format_err!("json_object_to_query: got wrong data type (expected object).") | |
79 | })?; | |
80 | ||
81 | for (key, value) in object { | |
82 | match value { | |
6100071f WB |
83 | Value::Bool(b) => { |
84 | query.append_pair(key, &b.to_string()); | |
85 | } | |
86 | Value::Number(n) => { | |
87 | query.append_pair(key, &n.to_string()); | |
88 | } | |
89 | Value::String(s) => { | |
90 | query.append_pair(key, &s); | |
91 | } | |
f5f13ebc DM |
92 | Value::Array(arr) => { |
93 | for element in arr { | |
94 | match element { | |
6100071f WB |
95 | Value::Bool(b) => { |
96 | query.append_pair(key, &b.to_string()); | |
97 | } | |
98 | Value::Number(n) => { | |
99 | query.append_pair(key, &n.to_string()); | |
100 | } | |
101 | Value::String(s) => { | |
102 | query.append_pair(key, &s); | |
103 | } | |
104 | _ => bail!( | |
105 | "json_object_to_query: unable to handle complex array data types." | |
106 | ), | |
f5f13ebc DM |
107 | } |
108 | } | |
109 | } | |
110 | _ => bail!("json_object_to_query: unable to handle complex data types."), | |
111 | } | |
112 | } | |
113 | ||
114 | Ok(query.finish()) | |
115 | } | |
116 | ||
0fe5d605 | 117 | pub fn required_string_param<'a>(param: &'a Value, name: &str) -> Result<&'a str, Error> { |
6100071f | 118 | match param[name].as_str() { |
0fe5d605 DM |
119 | Some(s) => Ok(s), |
120 | None => bail!("missing parameter '{}'", name), | |
121 | } | |
122 | } | |
0d38dcb4 | 123 | |
e17d5d86 DM |
124 | pub fn required_string_property<'a>(param: &'a Value, name: &str) -> Result<&'a str, Error> { |
125 | match param[name].as_str() { | |
126 | Some(s) => Ok(s), | |
127 | None => bail!("missing property '{}'", name), | |
128 | } | |
129 | } | |
130 | ||
0d38dcb4 | 131 | pub fn required_integer_param<'a>(param: &'a Value, name: &str) -> Result<i64, Error> { |
6100071f | 132 | match param[name].as_i64() { |
0d38dcb4 DM |
133 | Some(s) => Ok(s), |
134 | None => bail!("missing parameter '{}'", name), | |
f8dfbb45 DM |
135 | } |
136 | } | |
137 | ||
e17d5d86 DM |
138 | pub fn required_integer_property<'a>(param: &'a Value, name: &str) -> Result<i64, Error> { |
139 | match param[name].as_i64() { | |
140 | Some(s) => Ok(s), | |
141 | None => bail!("missing property '{}'", name), | |
142 | } | |
143 | } | |
144 | ||
f8dfbb45 | 145 | pub fn required_array_param<'a>(param: &'a Value, name: &str) -> Result<Vec<Value>, Error> { |
6100071f | 146 | match param[name].as_array() { |
f8dfbb45 DM |
147 | Some(s) => Ok(s.to_vec()), |
148 | None => bail!("missing parameter '{}'", name), | |
0d38dcb4 DM |
149 | } |
150 | } | |
383e8577 | 151 | |
e17d5d86 DM |
152 | pub fn required_array_property<'a>(param: &'a Value, name: &str) -> Result<Vec<Value>, Error> { |
153 | match param[name].as_array() { | |
154 | Some(s) => Ok(s.to_vec()), | |
155 | None => bail!("missing property '{}'", name), | |
156 | } | |
157 | } | |
158 | ||
62ee2eb4 | 159 | pub fn complete_file_name<S: BuildHasher>(arg: &str, _param: &HashMap<String, String, S>) -> Vec<String> { |
383e8577 DM |
160 | let mut result = vec![]; |
161 | ||
6100071f | 162 | use nix::fcntl::AtFlags; |
383e8577 DM |
163 | use nix::fcntl::OFlag; |
164 | use nix::sys::stat::Mode; | |
383e8577 | 165 | |
62ee2eb4 | 166 | let mut dirname = std::path::PathBuf::from(if arg.is_empty() { "./" } else { arg }); |
383e8577 DM |
167 | |
168 | let is_dir = match nix::sys::stat::fstatat(libc::AT_FDCWD, &dirname, AtFlags::empty()) { | |
169 | Ok(stat) => (stat.st_mode & libc::S_IFMT) == libc::S_IFDIR, | |
170 | Err(_) => false, | |
171 | }; | |
172 | ||
173 | if !is_dir { | |
174 | if let Some(parent) = dirname.parent() { | |
175 | dirname = parent.to_owned(); | |
176 | } | |
177 | } | |
178 | ||
6100071f WB |
179 | let mut dir = |
180 | match nix::dir::Dir::openat(libc::AT_FDCWD, &dirname, OFlag::O_DIRECTORY, Mode::empty()) { | |
181 | Ok(d) => d, | |
182 | Err(_) => return result, | |
183 | }; | |
383e8577 DM |
184 | |
185 | for item in dir.iter() { | |
186 | if let Ok(entry) = item { | |
187 | if let Ok(name) = entry.file_name().to_str() { | |
6100071f WB |
188 | if name == "." || name == ".." { |
189 | continue; | |
190 | } | |
383e8577 DM |
191 | let mut newpath = dirname.clone(); |
192 | newpath.push(name); | |
193 | ||
6100071f WB |
194 | if let Ok(stat) = |
195 | nix::sys::stat::fstatat(libc::AT_FDCWD, &newpath, AtFlags::empty()) | |
196 | { | |
383e8577 DM |
197 | if (stat.st_mode & libc::S_IFMT) == libc::S_IFDIR { |
198 | newpath.push(""); | |
199 | if let Some(newpath) = newpath.to_str() { | |
200 | result.push(newpath.to_owned()); | |
201 | } | |
202 | continue; | |
6100071f | 203 | } |
383e8577 DM |
204 | } |
205 | if let Some(newpath) = newpath.to_str() { | |
206 | result.push(newpath.to_owned()); | |
207 | } | |
6100071f | 208 | } |
383e8577 DM |
209 | } |
210 | } | |
211 | ||
212 | result | |
213 | } | |
443f3743 DM |
214 | |
215 | /// Scan directory for matching file names. | |
216 | /// | |
217 | /// Scan through all directory entries and call `callback()` function | |
218 | /// if the entry name matches the regular expression. This function | |
219 | /// used unix `openat()`, so you can pass absolute or relative file | |
220 | /// names. This function simply skips non-UTF8 encoded names. | |
221 | pub fn scandir<P, F>( | |
222 | dirfd: RawFd, | |
121f18ef | 223 | path: &P, |
443f3743 | 224 | regex: ®ex::Regex, |
6100071f | 225 | mut callback: F, |
443f3743 | 226 | ) -> Result<(), Error> |
6100071f WB |
227 | where |
228 | F: FnMut(RawFd, &str, nix::dir::Type) -> Result<(), Error>, | |
229 | P: ?Sized + nix::NixPath, | |
443f3743 | 230 | { |
121f18ef | 231 | for entry in self::fs::scan_subdir(dirfd, path, regex)? { |
443f3743 DM |
232 | let entry = entry?; |
233 | let file_type = match entry.file_type() { | |
234 | Some(file_type) => file_type, | |
235 | None => bail!("unable to detect file type"), | |
236 | }; | |
443f3743 | 237 | |
6100071f WB |
238 | callback( |
239 | entry.parent_fd(), | |
240 | unsafe { entry.file_name_utf8_unchecked() }, | |
241 | file_type, | |
242 | )?; | |
443f3743 DM |
243 | } |
244 | Ok(()) | |
245 | } | |
7e13b2d6 | 246 | |
c5946faf WB |
247 | /// Shortcut for md5 sums. |
248 | pub fn md5sum(data: &[u8]) -> Result<DigestBytes, Error> { | |
249 | hash(MessageDigest::md5(), data).map_err(Error::from) | |
250 | } | |
251 | ||
7e13b2d6 | 252 | pub fn get_hardware_address() -> Result<String, Error> { |
1631c54f | 253 | static FILENAME: &str = "/etc/ssh/ssh_host_rsa_key.pub"; |
7e13b2d6 | 254 | |
72c0e102 TL |
255 | let contents = proxmox::tools::fs::file_get_contents(FILENAME) |
256 | .map_err(|e| format_err!("Error getting host key - {}", e))?; | |
257 | let digest = md5sum(&contents) | |
258 | .map_err(|e| format_err!("Error digesting host key - {}", e))?; | |
7e13b2d6 | 259 | |
52fe9e8e | 260 | Ok(proxmox::tools::bin_to_hex(&digest).to_uppercase()) |
7e13b2d6 | 261 | } |
22968600 | 262 | |
af2fddea DM |
263 | pub fn assert_if_modified(digest1: &str, digest2: &str) -> Result<(), Error> { |
264 | if digest1 != digest2 { | |
6100071f | 265 | bail!("detected modified configuration - file changed by other user? Try again."); |
af2fddea DM |
266 | } |
267 | Ok(()) | |
268 | } | |
b9903d63 | 269 | |
09f12d1c | 270 | /// Extract a specific cookie from cookie header. |
b9903d63 | 271 | /// We assume cookie_name is already url encoded. |
09f12d1c | 272 | pub fn extract_cookie(cookie: &str, cookie_name: &str) -> Option<String> { |
b9903d63 | 273 | for pair in cookie.split(';') { |
b9903d63 DM |
274 | let (name, value) = match pair.find('=') { |
275 | Some(i) => (pair[..i].trim(), pair[(i + 1)..].trim()), | |
276 | None => return None, // Cookie format error | |
277 | }; | |
278 | ||
279 | if name == cookie_name { | |
8a1028e0 | 280 | use percent_encoding::percent_decode; |
b9903d63 DM |
281 | if let Ok(value) = percent_decode(value.as_bytes()).decode_utf8() { |
282 | return Some(value.into()); | |
283 | } else { | |
284 | return None; // Cookie format error | |
285 | } | |
286 | } | |
287 | } | |
288 | ||
289 | None | |
290 | } | |
af53186e DM |
291 | |
292 | pub fn join(data: &Vec<String>, sep: char) -> String { | |
af53186e DM |
293 | let mut list = String::new(); |
294 | ||
295 | for item in data { | |
62ee2eb4 | 296 | if !list.is_empty() { |
6100071f WB |
297 | list.push(sep); |
298 | } | |
af53186e DM |
299 | list.push_str(item); |
300 | } | |
301 | ||
302 | list | |
303 | } | |
ff7049d4 | 304 | |
002a191a DM |
305 | /// Detect modified configuration files |
306 | /// | |
add5861e | 307 | /// This function fails with a reasonable error message if checksums do not match. |
002a191a DM |
308 | pub fn detect_modified_configuration_file(digest1: &[u8;32], digest2: &[u8;32]) -> Result<(), Error> { |
309 | if digest1 != digest2 { | |
310 | bail!("detected modified configuration - file changed by other user? Try again."); | |
311 | } | |
312 | Ok(()) | |
313 | } | |
314 | ||
3578d99f DM |
315 | /// normalize uri path |
316 | /// | |
317 | /// Do not allow ".", "..", or hidden files ".XXXX" | |
318 | /// Also remove empty path components | |
319 | pub fn normalize_uri_path(path: &str) -> Result<(String, Vec<&str>), Error> { | |
3578d99f DM |
320 | let items = path.split('/'); |
321 | ||
322 | let mut path = String::new(); | |
323 | let mut components = vec![]; | |
324 | ||
325 | for name in items { | |
6100071f WB |
326 | if name.is_empty() { |
327 | continue; | |
328 | } | |
62ee2eb4 | 329 | if name.starts_with('.') { |
3578d99f DM |
330 | bail!("Path contains illegal components."); |
331 | } | |
332 | path.push('/'); | |
333 | path.push_str(name); | |
334 | components.push(name); | |
335 | } | |
336 | ||
337 | Ok((path, components)) | |
338 | } | |
339 | ||
97fab7aa | 340 | /// Helper to check result from std::process::Command output |
143b6545 DM |
341 | /// |
342 | /// The exit_code_check() function should return true if the exit code | |
343 | /// is considered successful. | |
344 | pub fn command_output( | |
345 | output: std::process::Output, | |
144006fa | 346 | exit_code_check: Option<fn(i32) -> bool>, |
e64b9f92 | 347 | ) -> Result<Vec<u8>, Error> { |
97fab7aa DM |
348 | |
349 | if !output.status.success() { | |
350 | match output.status.code() { | |
351 | Some(code) => { | |
143b6545 DM |
352 | let is_ok = match exit_code_check { |
353 | Some(check_fn) => check_fn(code), | |
354 | None => code == 0, | |
355 | }; | |
356 | if !is_ok { | |
97fab7aa DM |
357 | let msg = String::from_utf8(output.stderr) |
358 | .map(|m| if m.is_empty() { String::from("no error message") } else { m }) | |
359 | .unwrap_or_else(|_| String::from("non utf8 error message (suppressed)")); | |
360 | ||
361 | bail!("status code: {} - {}", code, msg); | |
362 | } | |
363 | } | |
364 | None => bail!("terminated by signal"), | |
365 | } | |
366 | } | |
367 | ||
e64b9f92 DM |
368 | Ok(output.stdout) |
369 | } | |
97fab7aa | 370 | |
e64b9f92 DM |
371 | /// Helper to check result from std::process::Command output, returns String. |
372 | /// | |
373 | /// The exit_code_check() function should return true if the exit code | |
374 | /// is considered successful. | |
375 | pub fn command_output_as_string( | |
376 | output: std::process::Output, | |
377 | exit_code_check: Option<fn(i32) -> bool>, | |
378 | ) -> Result<String, Error> { | |
379 | let output = command_output(output, exit_code_check)?; | |
380 | let output = String::from_utf8(output)?; | |
97fab7aa DM |
381 | Ok(output) |
382 | } | |
383 | ||
144006fa DM |
384 | pub fn run_command( |
385 | mut command: std::process::Command, | |
386 | exit_code_check: Option<fn(i32) -> bool>, | |
387 | ) -> Result<String, Error> { | |
388 | ||
389 | let output = command.output() | |
390 | .map_err(|err| format_err!("failed to execute {:?} - {}", command, err))?; | |
391 | ||
f254a270 | 392 | let output = command_output_as_string(output, exit_code_check) |
144006fa DM |
393 | .map_err(|err| format_err!("command {:?} failed - {}", command, err))?; |
394 | ||
395 | Ok(output) | |
396 | } | |
97fab7aa | 397 | |
ff7049d4 | 398 | pub fn fd_change_cloexec(fd: RawFd, on: bool) -> Result<(), Error> { |
6100071f | 399 | use nix::fcntl::{fcntl, FdFlag, F_GETFD, F_SETFD}; |
ff7049d4 WB |
400 | let mut flags = FdFlag::from_bits(fcntl(fd, F_GETFD)?) |
401 | .ok_or_else(|| format_err!("unhandled file flags"))?; // nix crate is stupid this way... | |
402 | flags.set(FdFlag::FD_CLOEXEC, on); | |
403 | fcntl(fd, F_SETFD(flags))?; | |
404 | Ok(()) | |
405 | } | |
9136f857 | 406 | |
9136f857 DM |
407 | static mut SHUTDOWN_REQUESTED: bool = false; |
408 | ||
409 | pub fn request_shutdown() { | |
6100071f WB |
410 | unsafe { |
411 | SHUTDOWN_REQUESTED = true; | |
412 | } | |
7a630df7 | 413 | crate::server::server_shutdown(); |
9136f857 DM |
414 | } |
415 | ||
416 | #[inline(always)] | |
417 | pub fn shutdown_requested() -> bool { | |
418 | unsafe { SHUTDOWN_REQUESTED } | |
419 | } | |
92da93b2 DM |
420 | |
421 | pub fn fail_on_shutdown() -> Result<(), Error> { | |
422 | if shutdown_requested() { | |
423 | bail!("Server shutdown requested - aborting task"); | |
424 | } | |
425 | Ok(()) | |
426 | } | |
d96bb7f1 | 427 | |
c4044009 WB |
428 | /// safe wrapper for `nix::unistd::pipe2` defaulting to `O_CLOEXEC` and guarding the file |
429 | /// descriptors. | |
efd1536e WB |
430 | pub fn pipe() -> Result<(Fd, Fd), Error> { |
431 | let (pin, pout) = nix::unistd::pipe2(nix::fcntl::OFlag::O_CLOEXEC)?; | |
432 | Ok((Fd(pin), Fd(pout))) | |
433 | } | |
2edc341b | 434 | |
c4044009 WB |
435 | /// safe wrapper for `nix::sys::socket::socketpair` defaulting to `O_CLOEXEC` and guarding the file |
436 | /// descriptors. | |
437 | pub fn socketpair() -> Result<(Fd, Fd), Error> { | |
438 | use nix::sys::socket; | |
439 | let (pa, pb) = socket::socketpair( | |
440 | socket::AddressFamily::Unix, | |
441 | socket::SockType::Stream, | |
442 | None, | |
443 | socket::SockFlag::SOCK_CLOEXEC, | |
444 | )?; | |
445 | Ok((Fd(pa), Fd(pb))) | |
446 | } | |
447 | ||
448 | ||
2edc341b DM |
449 | /// An easy way to convert types to Any |
450 | /// | |
451 | /// Mostly useful to downcast trait objects (see RpcEnvironment). | |
452 | pub trait AsAny { | |
dd5495d6 | 453 | fn as_any(&self) -> &dyn Any; |
2edc341b DM |
454 | } |
455 | ||
456 | impl<T: Any> AsAny for T { | |
6100071f WB |
457 | fn as_any(&self) -> &dyn Any { |
458 | self | |
459 | } | |
2edc341b | 460 | } |
8a1028e0 WB |
461 | |
462 | /// This used to be: `SIMPLE_ENCODE_SET` plus space, `"`, `#`, `<`, `>`, backtick, `?`, `{`, `}` | |
463 | pub const DEFAULT_ENCODE_SET: &AsciiSet = &percent_encoding::CONTROLS // 0..1f and 7e | |
464 | // The SIMPLE_ENCODE_SET adds space and anything >= 0x7e (7e itself is already included above) | |
465 | .add(0x20) | |
466 | .add(0x7f) | |
467 | // the DEFAULT_ENCODE_SET added: | |
468 | .add(b' ') | |
469 | .add(b'"') | |
470 | .add(b'#') | |
471 | .add(b'<') | |
472 | .add(b'>') | |
473 | .add(b'`') | |
474 | .add(b'?') | |
475 | .add(b'{') | |
476 | .add(b'}'); | |
386990ba WB |
477 | |
478 | /// Get an iterator over lines of a file, skipping empty lines and comments (lines starting with a | |
479 | /// `#`). | |
480 | pub fn file_get_non_comment_lines<P: AsRef<Path>>( | |
481 | path: P, | |
482 | ) -> Result<impl Iterator<Item = io::Result<String>>, Error> { | |
483 | let path = path.as_ref(); | |
484 | ||
485 | Ok(io::BufReader::new( | |
486 | File::open(path).map_err(|err| format_err!("error opening {:?}: {}", path, err))?, | |
487 | ) | |
488 | .lines() | |
489 | .filter_map(|line| match line { | |
490 | Ok(line) => { | |
491 | let line = line.trim(); | |
492 | if line.is_empty() || line.starts_with('#') { | |
493 | None | |
494 | } else { | |
495 | Some(Ok(line.to_string())) | |
496 | } | |
497 | } | |
498 | Err(err) => Some(Err(err)), | |
499 | })) | |
500 | } | |
e693818a | 501 | |
ac7513e3 DM |
502 | pub fn setup_safe_path_env() { |
503 | std::env::set_var("PATH", "/sbin:/bin:/usr/sbin:/usr/bin"); | |
504 | // Make %ENV safer - as suggested by https://perldoc.perl.org/perlsec.html | |
505 | for name in &["IFS", "CDPATH", "ENV", "BASH_ENV"] { | |
506 | std::env::remove_var(name); | |
507 | } | |
508 | } | |
cdf1da28 WB |
509 | |
510 | pub fn strip_ascii_whitespace(line: &[u8]) -> &[u8] { | |
511 | let line = match line.iter().position(|&b| !b.is_ascii_whitespace()) { | |
512 | Some(n) => &line[n..], | |
513 | None => return &[], | |
514 | }; | |
515 | match line.iter().rev().position(|&b| !b.is_ascii_whitespace()) { | |
516 | Some(n) => &line[..(line.len() - n)], | |
517 | None => &[], | |
518 | } | |
519 | } | |
1bc1d81a DM |
520 | |
521 | /// Seeks to start of file and computes the SHA256 hash | |
522 | pub fn compute_file_csum(file: &mut File) -> Result<([u8; 32], u64), Error> { | |
523 | ||
524 | file.seek(SeekFrom::Start(0))?; | |
525 | ||
526 | let mut hasher = openssl::sha::Sha256::new(); | |
527 | let mut buffer = proxmox::tools::vec::undefined(256*1024); | |
528 | let mut size: u64 = 0; | |
529 | ||
530 | loop { | |
531 | let count = match file.read(&mut buffer) { | |
532 | Ok(count) => count, | |
533 | Err(ref err) if err.kind() == std::io::ErrorKind::Interrupted => { | |
534 | continue; | |
535 | } | |
536 | Err(err) => return Err(err.into()), | |
537 | }; | |
538 | if count == 0 { | |
539 | break; | |
540 | } | |
541 | size += count as u64; | |
542 | hasher.update(&buffer[..count]); | |
543 | } | |
544 | ||
545 | let csum = hasher.finish(); | |
546 | ||
547 | Ok((csum, size)) | |
548 | } |