Fixed cryptography install

Signed-off-by: Andreas Maier <andreas.r.maier@gmx.de>

dev-requirements.txt

@@ -45,7 +45,7 @@ safety>=1.9.0; python_version >= '3.5'
 # Pip 19.1.1 does not recognize that dparse 0.5.0 has dropped support for Python 3.4
 dparse>=0.4.1,<0.5.0; python_version == '2.7'
 dparse>=0.4.1,<0.5.0; python_version == '3.4'
-dparse>=0.4.1; python_version >= '3.5'
+dparse>=0.5.1; python_version >= '3.5'
 
 # PyYAML is pulled in by dparse and python-coveralls, and is already covered in
 # requirements.txt. For Python 3.4, the pip version used (19.1.1) updates

minimum-constraints.txt

@@ -69,17 +69,27 @@
 # for a particular Python version.
 # On pypy3 (py36), pip 18.0 is needed to support constraints like cffi!=1.11.3,>=1.8
 # pip 10.0.0 introduced the --exclude-editable option.
+# pip before 21.0 cannot install cryptography on py39
 pip==10.0.1; python_version <= '3.5'
 pip==18.0; python_version == '3.6'
 pip==18.1; python_version == '3.7'
-pip==19.3.1; python_version >= '3.8'
+# pip==19.3.1; python_version >= '3.8'
+# TODO: Try latest setuptools on py39
+pip==19.3.1; python_version == '3.8'
+pip==21.0; python_version >= '3.9'
 setuptools==39.0.1; python_version <= '3.6'
 setuptools==40.6.0; python_version == '3.7'
-setuptools==41.5.0; python_version >= '3.8'
+# setuptools==41.5.0; python_version >= '3.8'
+# TODO: Try latest setuptools on py39
+setuptools==41.5.0; python_version == '3.8'
+setuptools==51.0.0; python_version >= '3.9'
+# setuptools==54.2.0; python_version >= '3.9'
 wheel==0.30.0; python_version <= '3.6'
 wheel==0.32.0; python_version == '3.7'
-wheel==0.33.5; python_version >= '3.8'
-
+# wheel==0.33.5; python_version >= '3.8'
+# TODO: Try latest wheel on py39
+wheel==0.33.5; python_version == '3.8'
+wheel==0.36.2; python_version >= '3.9'
 
 # Direct dependencies for installation (must be consistent with requirements.txt)
 
@@ -88,8 +98,15 @@ wheel==0.33.5; python_version >= '3.8'
 # tox 3.17 requires six>=1.14.0
 six==1.14.0
 
-cryptography==3.4.0
+cryptography==3.3; python_version == '2.7'
+cryptography==2.8; python_version == '3.4'
+cryptography==3.2.1; python_version == '3.5'
+cryptography==3.4.7; python_version >= '3.6'
+
 keyring==18.0.0
+# TODO: Try latest keyring on py39
+# keyring==18.0.0; python_version <= '3.8'
+# keyring==23.0.1; python_version >= '3.9'
 
 # PyYAML is also pulled in by dparse and python-coveralls
 PyYAML==5.3.1; python_version == '2.7'
@@ -100,6 +117,9 @@ yamlloader==0.5.5
 
 # Indirect dependencies for installation (must be consistent with requirements.txt, if present)
 
+pywin32-ctypes==0.2.0; sys_platform == 'win32'
+cffi==1.14.5
+
 
 # Direct dependencies for development (must be consistent with dev-requirements.txt)
 
@@ -124,7 +144,8 @@ coveralls==2.1.2; python_version >= '3.5'
 # Safety CI by pyup.io
 safety==1.8.7; python_version <= '3.4'
 safety==1.9.0; python_version >= '3.5'
-dparse==0.4.1
+dparse==0.4.1; python_version <= '3.4'
+dparse==0.5.1; python_version >= '3.5'
 
 # Sphinx (no imports, invoked via sphinx-build script):
 Sphinx==1.7.6
@@ -220,7 +241,6 @@ importlib-metadata==0.12; python_version <= '3.7'
 iniconfig==1.1.1
 isort==4.2.15
 Jinja2==2.8
-keyring==17.0.0; python_version >= '3.4'
 lazy-object-proxy==1.4.2
 MarkupSafe==0.23
 ordereddict==1.1

requirements.txt

@@ -20,8 +20,20 @@
 # tox 3.17 requires six>=1.14.0
 six>=1.14.0
 
-cryptography>=3.4.0
-keyring>=18.0.0
+# cryptography 2.9 removed support for Python 3.4
+# cryptography 3.3 removed support for Python 3.5
+# cryptography 3.4 removed support for Python 2.7
+cryptography>=3.3,<3.4; python_version == '2.7'
+cryptography>=2.8,<2.9; python_version == '3.4'
+cryptography>=3.2.1,<3.3; python_version == '3.5'
+cryptography>=3.4.7; python_version >= '3.6'
+
+# keyring 19.0.0 removed support for Python 2.7 + 3.4
+# keyring 21.0.0 removed support for Python 3.5
+keyring>=18.0.0,<19.0.0; python_version == '2.7'
+keyring>=18.0.0,<19.0.0; python_version == '3.4'
+keyring>=18.0.0,<21.0.0; python_version == '3.5'
+keyring>=18.0.0; python_version >= '3.6'
 
 # PyYAML 5.3 removed support for Python 3.4
 # PyYAML 5.3 fixed narrow build error on Python 2.7
@@ -34,3 +46,6 @@ yamlloader>=0.5.5
 
 
 # Indirect dependencies are not specified in this file, except when needed:
+
+pywin32-ctypes>=0.2.0; sys_platform == 'win32'
+cffi>=1.14.5