Select hash for context and SHA1 & MD5, solve issue avast#136

New:  Select hash for context and SHA1 & MD5
New: Case ignore in hashes, because why not
Bugfix: Only show "Select hash for context" next to valid hashes

Solve avast#136

.gitignore

@@ -2,3 +2,4 @@
 .ropeproject
 __pycache__
 dist
+*.swp

tests/unit/test_utils.py

@@ -67,12 +67,13 @@ def test_first_non_space():
 
 
 def test_is_sha():
-    assert utils.is_sha256_hash("f3b7edffa346c23f24beba4d93880f358532085b3598319fed0cfa3010bbe675")
-    assert not utils.is_sha256_hash("")
-    assert utils.is_sha256_hash("a" * 64)
-    assert not utils.is_sha256_hash("A" * 64)
-    assert not utils.is_sha256_hash(" " + "A" * 64)
-    assert not utils.is_sha256_hash("A" * 64 + " ")
+    assert utils.is_hash("f3b7edffa346c23f24beba4d93880f358532085b3598319fed0cfa3010bbe675")
+    assert utils.is_hash("93880f358532085b3598319fed0cfa3010bbe675")
+    assert utils.is_hash("8532085b3598319fed0cfa3010bbe675")
+    assert utils.is_hash("8532085B3598319FED0CFA3010BBE675")
+    assert not utils.is_hash("")
+    assert not utils.is_hash(" " + "A" * 64)
+    assert not utils.is_hash("A" * 64 + " ")
 
 
 def test_range_from_line(mocker: MockerFixture):

yls/server.py

@@ -477,7 +477,7 @@ def code_lens_eval(yara_file: yaramod.YaraFile) -> list[lsp_types.CodeLens]:
     for rule in utils.yaramod_rules_in_file(yara_file):
         for meta in rule.metas:
             # Consider only hash metas that have valid hash as value
-            if meta.key != "hash" and not utils.is_sha256_hash(meta.value.pure_text):
+            if meta.key != "hash" or not utils.is_hash(meta.value.pure_text):
                 continue
 
             # Create code lens for debugging
@@ -595,7 +595,7 @@ async def command_eval_set_context(ls: YaraLanguageServer, args: list[Any]) -> N
     utils.log_command(YaraLanguageServer.COMMAND_EVAL_SET_CONTEXT)
     log.debug(f"{args=}")
 
-    if len(args) != 2 or not utils.is_sha256_hash(args[0]):
+    if len(args) != 2 or not utils.is_hash(args[0]):
         return
 
     _hash = args[0]

yls/utils.py

@@ -484,11 +484,15 @@ def debug_hover(document: Document, position: lsp_types.Position) -> lsp_types.H
     return lsp_types.Hover(contents=f"Token = {token}\nLSP Position = {position}")
 
 
-def is_sha256_hash(i: str) -> bool:
-    """Check if the `i` looks like a sha256 hash.
+def is_hash(i: str) -> bool:
+    """Check if the `i` looks like a md5, sha1 or sha256 hash.
 
-    We accept only lowercase hashes because it is the same behavior as YRTC."""
-    return re.fullmatch("[0-9a-f]{64}", i) is not None
+    We accept upper and lowercase hashes"""
+    return (
+                re.fullmatch("[0-9a-f]{32}", i, flags=re.IGNORECASE) or
+                re.fullmatch("[0-9a-f]{40}", i, flags=re.IGNORECASE) or
+                re.fullmatch("[0-9a-f]{64}", i, flags=re.IGNORECASE)
+            ) is not None
 
 
 def markdown_content(value: str) -> lsp_types.MarkupContent:
@@ -526,7 +530,7 @@ def yaramod_rule_has_hashes(rule: yaramod.Rule) -> bool:
     """Check if YARA rule contains sample hashes in hash meta."""
     for meta in rule.metas:
         # Consider only hash metas that have valid hash as value
-        if meta.key != "hash" or not is_sha256_hash(meta.value.pure_text):
+        if meta.key != "hash" or not is_hash(meta.value.pure_text):
             continue
 
         return True