Adding upstream version 1:7.0.3.upstream/1%7.0.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 87 insertions, 0 deletions

diff --git a/rust/src/lzma.rs b/rust/src/lzma.rs
new file mode 100644
index 0000000..e10d803
--- /dev/null
+++ b/rust/src/lzma.rs
@@ -0,0 +1,87 @@
+/* Copyright (C) 2022 Open Information Security Foundation
+ *
+ * You can copy, redistribute or modify this Program under the terms of
+ * the GNU General Public License version 2 as published by the Free
+ * Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+//! lzma decompression utility module.
+
+use lzma_rs::decompress::{Options, Stream};
+use lzma_rs::error::Error;
+use std::io::{Cursor, Write};
+
+/// Propagate lzma crate errors
+#[repr(C)]
+pub enum LzmaStatus {
+    LzmaOk,
+    LzmaIoError,
+    LzmaHeaderTooShortError,
+    LzmaError,
+    LzmaMemoryError,
+    LzmaXzError,
+}
+
+impl From<Error> for LzmaStatus {
+    fn from(e: Error) -> LzmaStatus {
+        match e {
+            Error::IoError(_) => LzmaStatus::LzmaIoError,
+            Error::HeaderTooShort(_) => LzmaStatus::LzmaHeaderTooShortError,
+            Error::LzmaError(e) => {
+                if e.contains("exceeded memory limit") {
+                    LzmaStatus::LzmaMemoryError
+                } else {
+                    LzmaStatus::LzmaError
+                }
+            }
+            Error::XzError(_) => LzmaStatus::LzmaXzError,
+        }
+    }
+}
+
+impl From<std::io::Error> for LzmaStatus {
+    fn from(_e: std::io::Error) -> LzmaStatus {
+        LzmaStatus::LzmaIoError
+    }
+}
+
+/// Use the lzma algorithm to decompress a chunk of data.
+#[no_mangle]
+pub unsafe extern "C" fn lzma_decompress(
+    input: *const u8, input_len: &mut usize, output: *mut u8, output_len: &mut usize,
+    memlimit: usize,
+) -> LzmaStatus {
+    let input = std::slice::from_raw_parts(input, *input_len);
+    let output = std::slice::from_raw_parts_mut(output, *output_len);
+    let output = Cursor::new(output);
+
+    let options = Options {
+        memlimit: Some(memlimit),
+        allow_incomplete: true,
+        ..Default::default()
+    };
+
+    let mut stream = Stream::new_with_options(&options, output);
+
+    if let Err(e) = stream.write_all(input) {
+        return e.into();
+    }
+
+    match stream.finish() {
+        Ok(output) => {
+            *output_len = output.position() as usize;
+            LzmaStatus::LzmaOk
+        }
+        Err(e) => e.into(),
+    }
+}