Add openssl support in univers

- closes #36
- For `OpenSSL-FIPS Module` see #41

Signed-off-by: keshav-space <keshav6240@gmail.com>

Author: keshav-space

src/univers/version_constraint.py

@@ -157,6 +157,22 @@ def from_string(cls, string, version_class):
             version = None
         else:
             version = version_class(version)
+
+        """
+        Can't always be certain that a particular class would create an object
+        of its own kind it may return an object of a different class.
+
+        Example:
+        OpensslVersion when instantiated will return either an object of
+        LegacyOpensslVersion or SemverVersion depending on version.
+        OpensslVersion("0.9.8a") -> LegacyOpensslVersion(string="0.9.8a")
+        OpensslVersion("3.0.1") -> SemverVersion(string="3.0.1")
+
+        Hence the need for updating `version_class` after creation of version object
+        """
+        if version != None:
+            version_class = version.__class__
+
         return cls(comparator=comparator, version=version, version_class=version_class)
 
     @staticmethod

src/univers/version_range.py

@@ -868,6 +868,25 @@ def from_native(cls, string):
         return cls(constraints=constraints)
 
 
+class OpensslVersionRange(VersionRange):
+    scheme = "openssl"
+    version_class = versions.OpensslVersion
+    # openssl doesn't use <,>,<=,>=
+    # https://www.openssl.org/news/vulnerabilities.xml
+    vers_by_native_comparators = {"=": "="}
+
+    @classmethod
+    def from_native(cls, string):
+        cleaned = remove_spaces(string).lower()
+        constraints = set()
+        # plain single version
+        for clause in cleaned.split(","):
+            version = cls.version_class(clause)
+            constraint = VersionConstraint(comparator="=", version=version)
+            constraints.add(constraint)
+        return cls(constraints=list(constraints))
+
+
 def is_even(s):
     """
     Return True if the string "s" is an even number and False if this is an odd
@@ -902,4 +921,5 @@ def is_even(s):
     "ebuild": EbuildVersionRange,
     "archlinux": ArchLinuxVersionRange,
     "nginx": NginxVersionRange,
+    "openssl": OpensslVersionRange,
 }

src/univers/versions.py

@@ -5,6 +5,7 @@
 # Visit https://aboutcode.org and https://github.com/nexB/univers for support and download.
 
 from functools import total_ordering
+import re
 
 import attr
 import semantic_version
@@ -343,3 +344,82 @@ def __gt__(self, other):
         if not isinstance(other, self.__class__):
             return NotImplemented
         return gentoo.vercmp(self.value, other.value) > 0
+
+
+@attr.s(frozen=True, order=False, eq=False, hash=True)
+class LegacyOpensslVersion(Version):
+    @classmethod
+    def is_valid(cls, string):
+        return OpensslVersion.is_valid_legacy(string)
+
+    # OpenSSL doesn't seems to use >,<,>=,=<
+    # See: https://www.openssl.org/news/vulnerabilities.xml
+    def __eq__(self, other):
+        if isinstance(other, SemverVersion):
+            return False
+        if not isinstance(other, self.__class__):
+            return NotImplemented
+        return self.value == other.value
+
+    def __lt__(self, other):
+        # All legacy scheme is behind those using semver
+        if isinstance(other, SemverVersion):
+            return True
+        if not isinstance(other, self.__class__):
+            return NotImplemented
+        re_vers1 = re.findall(r"^(\d+\.\d+\.\d+)(.*)$", self.value)[0]
+        re_vers2 = re.findall(r"^(\d+\.\d+\.\d+)(.*)$", other.value)[0]
+        if int(re_vers1[0].replace(".", "")) < int(re_vers2[0].replace(".", "")):
+            return True
+        return re_vers1[0] == re_vers2[0] and re_vers1[1] < re_vers2[1]
+
+    def __gt__(self, other):
+        # All openssl version using semver is ahead of legacy scheme
+        if isinstance(other, SemverVersion):
+            return False
+        if not isinstance(other, self.__class__):
+            return NotImplemented
+        re_vers1 = re.findall(r"^(\d+\.\d+\.\d+)([a-z-]+)$", self.value)[0]
+        re_vers2 = re.findall(r"^(\d+\.\d+\.\d+)([a-z-]+)$", other.value)[0]
+        if int(re_vers1[0].replace(".", "")) > int(re_vers2[0].replace(".", "")):
+            return True
+        return re_vers1[0] == re_vers2[0] and re_vers1[1] > re_vers2[1]
+
+    def __le__(self, other):
+        return self.__lt__(other) or self.__eq__(other)
+
+    def __ge__(self, other):
+        return self.__gt__(other) or self.__eq__(other)
+
+
+@attr.s(frozen=True, order=False, eq=False, hash=True)
+class OpensslVersion:
+    """
+    Handles the object creation for openssl depending on
+    whether version is legacy or semver
+    """
+
+    def __new__(cls, string):
+        if OpensslVersion.is_valid_legacy(string):
+            return LegacyOpensslVersion(string)
+        elif OpensslVersion.is_valid_new_openssl(string):
+            return SemverVersion(string)
+        raise InvalidVersion(f"{string!r} is not a valid/supported OpensslVersion")
+
+    @classmethod
+    def is_valid_legacy(cls, string):
+        # all legacy base version of openssl that ever exited/exists
+        all_legacy_base = ["0.9.6", "0.9.7", "0.9.8", "1.0.0", "1.0.1", "1.0.2", "1.1.0", "1.1.1"]
+        if string in all_legacy_base:
+            return True
+        regexed_string = re.findall(r"^(\d+\.\d+\.\d+)([a-z-]+)$", string)
+        if not regexed_string or regexed_string[0][0] not in all_legacy_base:
+            return False
+        return True
+
+    @classmethod
+    def is_valid_new_openssl(cls, string):
+        regexed_string = re.findall(r"^(\d+)(\.)(.*)$", string)
+        if not regexed_string or int(regexed_string[0][0]) < 3:
+            return False
+        return SemverVersion.is_valid(string)

tests/test_version_range.py

@@ -14,9 +14,11 @@
 from univers.version_range import VersionRange
 from univers.version_range import RANGE_CLASS_BY_SCHEMES
 from univers.version_range import NpmVersionRange
+from univers.version_range import OpensslVersionRange
 from univers.versions import PypiVersion
 from univers.versions import RubygemsVersion
 from univers.versions import SemverVersion
+from univers.versions import LegacyOpensslVersion
 
 
 class TestVersionRange(TestCase):
@@ -233,10 +235,40 @@ def test_NpmVersionRange_from_native_with_approximately_equal_to_operator(self):
         version_range = NpmVersionRange.from_native(npm_range)
         assert version_range == expected
 
+    def test_OpensslVersionRange_from_native_single_legacy(self):
+        openssl_range = "0.9.8j"
+        expected = OpensslVersionRange(
+            constraints=(
+                VersionConstraint(comparator="=", version=LegacyOpensslVersion(string="0.9.8j")),
+            )
+        )
+        version_range = OpensslVersionRange.from_native(openssl_range)
+        assert version_range == expected
+
+    def test_OpensslVersionRange_from_native_single_new_semver(self):
+        openssl_range = "3.0.1"
+        expected = OpensslVersionRange(
+            constraints=(VersionConstraint(comparator="=", version=SemverVersion(string="3.0.1")),)
+        )
+        version_range = OpensslVersionRange.from_native(openssl_range)
+        assert version_range == expected
+
+    def test_OpensslVersionRange_from_native_mixed(self):
+        openssl_range = "3.0.0, 1.0.1b"
+        expected = OpensslVersionRange(
+            constraints=(
+                VersionConstraint(comparator="=", version=LegacyOpensslVersion(string="1.0.1b")),
+                VersionConstraint(comparator="=", version=SemverVersion(string="3.0.0")),
+            )
+        )
+        version_range = OpensslVersionRange.from_native(openssl_range)
+        assert version_range == expected
+
 
 VERSION_RANGE_TESTS_BY_SCHEME = {
     "nginx": ["0.8.40+", "0.7.52-0.8.39", "0.9.10", "1.5.0+, 1.4.1+"],
     "npm": ["^1.2.9", "~3.8.2", "5.0.0 - 7.2.3", "2.1 || 2.6", "1.1.2 1.2.2", "<=2.1 >=1.1"],
+    "openssl": ["1.1.1ak", "1.1.0", "3.0.2", "3.0.1, 0.9.7a", "1.0.2ck, 3.1.2"],
 }