From 9b84a2c23511a4d76507abed27234b33ce43dac3 Mon Sep 17 00:00:00 2001
From: MultisampledNight <80128916+MultisampledNight@users.noreply.github.com>
Date: Mon, 9 Feb 2026 22:24:51 +0100
Subject: [PATCH 1/2] =?UTF-8?q?compress:=20expose=20Padm=C3=A9=20size=20ob?=
 =?UTF-8?q?fuscation=20via=20UI?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fixes #9286.
Tested manually via:

 = export BORG_REPO=repo
 = alias b='python -m borg'
 = echo meow > file
 = b create ::test ./file -C obfuscate,250,none
 = b info
Archive name: ::test
Archive fingerprint: 2c67ba6c04faa6d911b5dd02b99593ea2cf6ebe7c38e2e6fca90afad47a7095e
[...]
Command line: /home/user/c/d0/software/backup/borg/src/borg/__main__.py create ::test ./file -C obfuscate,250,none
[...]
Number of files: 1
Original size: 40 B
 = rm file
 = b list ::test
-rw-r--r-- user   users         5 Mon, 2026-02-09 22:41:54 +0100 file
 = b extract ::test file
 = cat file
meow
 = # Yup, all good. Let's go for something nontrivial to make sure it's stripped accordingly.
 = dd if=/dev/urandom of=file bs=1M count=4
 = b create ::test ./file -C obfuscate,250,zstd
 = mv file original
 = b info
Archive name: ::test
Archive fingerprint: 2c67ba6c04faa6d911b5dd02b99593ea2cf6ebe7c38e2e6fca90afad47a7095e
[...]
Command line: /home/user/c/d0/software/backup/borg/src/borg/__main__.py create ::test ./file -C obfuscate,250,none
Working Directory: /home/user/l/bug/borg
Number of files: 1
Original size: 40 B

Archive name: ::test
Archive fingerprint: 01014345dd1187f014f19ac59a2313a4e6d644532b287d806fe87882ca47ea0d
[...]
Command line: /home/user/c/d0/software/backup/borg/src/borg/__main__.py create ::test ./file -C obfuscate,250,zstd
Working Directory: /home/user/l/bug/borg
Number of files: 1
Original size: 4.19 MB
 = b extract aid:01014345dd1187f014f19ac59a2313a4e6d644532b287d806fe87882ca47ea0d
 = sha256sum file original
d74be01406764ef11f5aa3ee27033bdced2c9573c0b3ed980fcfb2116c7d84de  file
d74be01406764ef11f5aa3ee27033bdced2c9573c0b3ed980fcfb2116c7d84de  original
 =
---
 src/borg/compress.pyx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/borg/compress.pyx b/src/borg/compress.pyx
index aad1e8d55a..c370f1f79e 100644
--- a/src/borg/compress.pyx
+++ b/src/borg/compress.pyx
@@ -600,8 +600,8 @@ class CompressionSpec:
         elif self.name == 'obfuscate':
             if 3 <= count <= 5:
                 level = int(values[1])
-                if not ((1 <= level <= 6) or (110 <= level <= 123)):
-                    raise ArgumentTypeError("level must be >= 1 and <= 6 or >= 110 and <= 123")
+                if not ((1 <= level <= 6) or (110 <= level <= 123) or (level == 250)):
+                    raise ArgumentTypeError("level must be (inclusively) within 1...6, 110...123 or equal to 250")
                 self.level = level
                 compression = ','.join(values[2:])
             else:

From 261705c4c17de7301a30ff9c59aac4e0551c85ef Mon Sep 17 00:00:00 2001
From: MultisampledNight <80128916+MultisampledNight@users.noreply.github.com>
Date: Mon, 9 Feb 2026 23:19:20 +0100
Subject: [PATCH 2/2] test(compress): roundtrip through UI parsing

---
 src/borg/testsuite/compress.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/borg/testsuite/compress.py b/src/borg/testsuite/compress.py
index 160f250fc5..719c80f0d8 100644
--- a/src/borg/testsuite/compress.py
+++ b/src/borg/testsuite/compress.py
@@ -215,7 +215,7 @@ def test_obfuscate():
     ],
 )
 def test_padme_obfuscation(data_length, expected_padding):
-    compressor = Compressor(name="obfuscate", level=250, compressor=Compressor("none"))
+    compressor = CompressionSpec("obfuscate,250,none").compressor
     # The inner compressor will add an inner header of 2 bytes, so we reduce the data length by 2 bytes
     # to be able to use (almost) the same test cases as in the master branch.
     data = b"x" * (data_length - 2)