cpe: handle uppercase CPEs as well

not quite clear if that's needed for 2.3, but 2.2 is an URI,
so the scheme should be handled case insensitive there.

Author: lazka

msys2_devtools/cpe.py

@@ -15,7 +15,7 @@ class CPESpecial(Enum):
 def parse_cpe22(cpe: str) -> tuple[CPEValue, CPEValue, CPEValue, CPEValue]:
     """Parse a CPE 2.2 URI"""
 
-    if not cpe.startswith("cpe:/"):
+    if not cpe.lower().startswith("cpe:/"):
         raise ValueError("invalid cpe format")
     components = []
     for part in cpe[5:].split(":"):
@@ -33,7 +33,7 @@ def parse_cpe22(cpe: str) -> tuple[CPEValue, CPEValue, CPEValue, CPEValue]:
 def parse_cpe23(cpe: str) -> tuple[CPEValue, CPEValue, CPEValue, CPEValue]:
     """Parse a CPE 2.3 string, also partial CPEs and missing components are treated as ANY."""
 
-    if not cpe.startswith("cpe:2.3:"):
+    if not cpe.lower().startswith("cpe:2.3:"):
         raise ValueError("invalid cpe format")
 
     def split_and_unquote(s: str) -> list[CPEValue]:
@@ -80,9 +80,9 @@ def push():
 def parse_cpe(cpe: str) -> tuple[CPEValue, CPEValue, CPEValue, CPEValue]:
     """Parse a CPE string into a tuple for the first four components"""
 
-    if cpe.startswith("cpe:2.3:"):
+    if cpe.lower().startswith("cpe:2.3:"):
         return parse_cpe23(cpe)
-    elif cpe.startswith("cpe:/"):
+    elif cpe.lower().startswith("cpe:/"):
         return parse_cpe22(cpe)
     else:
         raise ValueError("unknown cpe format")

tests/test_cpe.py

@@ -5,6 +5,7 @@
 
 def test_parse_cpe_22():
     assert parse_cpe("cpe:/") == (CPEAny, CPEAny, CPEAny, CPEAny)
+    assert parse_cpe("CPE:/") == (CPEAny, CPEAny, CPEAny, CPEAny)
     assert parse_cpe("cpe:/a:cryptopp:crypto%2b%2b:8.9.0") == ("a", "cryptopp", "crypto++", "8.9.0")
     assert parse_cpe("cpe:/a:cryptopp:crypto%2b%2b") == ("a", "cryptopp", "crypto++", CPEAny)
     assert parse_cpe("cpe:/a::crypto%2b%2b") == ("a", CPEAny, "crypto++", CPEAny)
@@ -20,6 +21,7 @@ def test_parse_cpe_23():
     assert parse_cpe("cpe:2.3:a:*:bar") == ("a", CPEAny, "bar", CPEAny)
     assert parse_cpe("cpe:2.3:a:\\*:bar") == ("a", "*", "bar", CPEAny)
     assert parse_cpe("cpe:2.3:a:-:bar") == ("a", CPENA, "bar", CPEAny)
+    assert parse_cpe("CPE:2.3:a") == ("a", CPEAny, CPEAny, CPEAny)
     with pytest.raises(ValueError):
         assert parse_cpe("cpe:2.3:a::") == ("a", "", "", CPEAny)
     with pytest.raises(ValueError):