First commit.

.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+flask_session/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/

pyproject.toml

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+[build-system]
+requires = [
+    "setuptools>=42",
+    "wheel",
+    "setuptools_scm[toml]>3.4",
+]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools_scm]
+write_to = "src/zolfa/zauth/version.py"

setup.cfg

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+[metadata]
+name = Zauth
+version = attr:zolfa.zauth.version
+author = Zolfa
+author_email = zolfa@lilik.it
+description = Helpers to authenticate and programmatically use external websites.
+classifiers =
+    Development Status :: 1 - Planning
+    Programming Language :: Python
+    Programming Language :: Python :: 3.11
+
+platforms = any
+
+[options]
+include_package_data = True
+packages = find_namespace:
+package_dir =
+    = src
+install_requires =
+    requests
+    lxml
+setup_requires =
+    setuptools_scm
+
+[options.packages.find]
+where = src
+include = zolfa.*
+
+[options.entry_points]
+console_scripts =
+    serve_freebeer=stapa.freebeer.serve:serve

src/zolfa/zauth/pasteur.py

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+import logging
+import random
+import re
+from http.cookiejar import Cookie
+from urllib.parse import urljoin, urlparse, parse_qs
+
+import requests
+
+from .utils.webclient import WebClient
+from .utils.exceptions import *
+
+logger = logging.getLogger(__name__)
+logger.setLevel(logging.INFO)
+
+
+class PasteurSSO:
+    HEADERS = {
+        'User-Agent': ("Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:104.0)"
+                       " Gecko/20100101 Firefox/104.0)")
+    }
+    SP_START = "https://connect.pasteur.fr"
+    IDP_ENTRY_POINT = "https://idp.pasteur.fr/idp/profile/SAML2/POST/SSO"
+
+    def __init__(self, username, password):
+        self.username = username
+        self.password = password
+        self.client = WebClient(headers=self.HEADERS)
+
+    def authenticate(self):
+        # Go to SP authentication start page and look for SAML form.
+        logger.info(f"SP: Starting authentication from {self.SP_START}")
+        self.client.get(self.SP_START)
+        if not self.client.find_forms(action=self.IDP_ENTRY_POINT):
+            logger.info("SP: SAML form not found: already logged in?")
+            self.verify_sp_auth()
+            return
+
+        # Send SAML form to the IDP entry point
+        logger.info(f"SP: SAML form found: submitting to IDP")
+        self.client.select_form(action=self.IDP_ENTRY_POINT)
+        self.client.submit_form()
+        if self.client.status_code == 400:
+            raise Exception("IDP: Error 400: SAML request probably expired.")
+
+        # Check if already authenticated to IDP
+        self.client.select_form()
+        if 'SAMLResponse' in self.client.form:
+            logger.info("IDP: Already authenticated")
+        else:
+            # Perform authentication with IDP
+            logger.info("IDP: Authentication required.")
+            self.client.select_form()
+            self.client.submit_form()
+            self.client.select_form()
+            self.client.form['j_username'] = self.username
+            self.client.form['j_password'] = self.password
+            self.client.form['_eventId_proceed'] = ""
+            # Make authentication persistent
+            self.client.form['donotcache'] = "0"
+            logger.info(f"IDP: Authenticating '{self.username}'.")
+            self.client.submit_form()
+            self.client.select_form()
+            if 'SAMLResponse' not in self.client.form:
+                raise Exception("IDP: Authentication failed.")
+
+        # Send IDP SAMLResponse back to SP
+        logger.info("IDP: Got SAMLResponse, sending to SP")
+        self.client.submit_form()
+
+        self.sp_after_saml()
+
+    def verify_sp_auth(self):
+        m = re.match(
+            r"https://connect.pasteur.fr/f5-w-[0-9a-f]+\$\$/connect/$",
+            sso.client.url
+        )
+        if not m:
+            raise Exception("SP: unlogged and not redirecting to IDP!")
+
+    def sp_after_saml(self):
+        pass
+
+
+class PasteurEmail(PasteurSSO):
+    SP_START = "https://email.pasteur.fr"
+
+    def verify_sp_auth(self):
+        if self.client.url != 'https://email.pasteur.fr/owa/':
+            raise Exception("SP: unlogged and not redirecting to IDP!")
+
+
+class PasteurSAP(PasteurSSO):
+    SP_START = "https://portailha.pasteur.fr"
+
+    def sp_after_saml(self):
+        self.client.select_form(action="/sap/bc/ui2/nwbc")
+        self.client.submit_form()
+
+    def verify_sp_auth(self):
+        pass
+
+
+class PasteurEurofins(PasteurSAP):
+    def authenticate(self):
+        self.client.get("https://b2b.eurofinsgenomics.eu")
+        if self.client.url == "https://b2b.eurofinsgenomics.eu/":
+            return True
+
+        super().authenticate()
+
+        self.client.get(
+            f"https://portailha.pasteur.fr/sap/opu/odata/srmnxp"
+            f"/CATALOG_LAUNCH_DETAILS/PollDetails(LAUNCH_FROM='PUNCH_OUT',"
+            f"SERVICE_ID='PEUROFINS2',OBJECT_ID='442078',PRODUCTID='')/?="
+            f"&random={random.random()}&random={random.random()}",
+            headers={'Accept': "application/json"}
+        )
+        launch_data = self.client.res.json()['d']
+        self.client.post(
+            launch_data['SERVICE_URL'],
+            data=launch_data['FORM_DATA']
+        )

src/zolfa/zauth/utils/exceptions.py

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+class HTTPError(Exception):
+    def __init__(self, ans):
+        self.ans = ans
+        self.status_code = ans.status_code
+        super().__init__(f"Unexpected Status Code: {self.status_code}")
+
+
+class TooManyFormsError(Exception):
+    def __init__(self, res, filters):
+        self.res = res
+        self.filters = filters
+        message = f"Too many forms matched the filters: {filters}."
+        super().__init__(message)
+
+
+class FormNotFoundError(Exception):
+    def __init__(self, res, filters):
+        self.res = res
+        self.filters = filters
+        message = f"No forms matched the filters: {filters}."
+        super().__init__(message)
+
+
+class NoFormSelectedError(Exception):
+    def __init__(self, function):
+        message = (f"Function '{function}' has been called before selecting "
+                   f" any form.")
+        super().__init__(message)
+
+
+class RemoteException(Exception):
+    def __init__(self, message, ans):
+        self.ans = ans
+        super().__init__(message)

src/zolfa/zauth/utils/webclient.py

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+from urllib.parse import urljoin
+
+import requests
+from lxml.etree import HTML
+
+from .exceptions import *
+
+
+class WebClientForm:
+    def __init__(self, form):
+        self.action = form.attrib['action']
+        self.method = form.attrib.get('method', "GET").upper()
+        self.data = {i.attrib['name']: i.attrib.get('value', "")
+                     for i in form.xpath("//input")
+                     if 'name' in i.attrib}
+
+    def update(self, items):
+        for k, v in items.items():
+            self[k] = v
+
+    def __getitem__(self, k):
+        return self.data[k]
+
+    def __setitem__(self, k, v):
+        self.data.update({k: v})
+
+    def __contains__(self, k):
+        return k in self.data
+
+    def __iter__(self):
+        return self.data.items()
+
+    def __repr__(self):
+        return str((self.method, self.action, self.data))
+
+
+class WebClient(requests.Session):
+    def __init__(self, headers={}, **kwargs):
+        self.url = ""
+        self.res = None
+        self.form = None
+        super().__init__(**kwargs)
+        self.headers.update(headers)
+
+    def send(self, *args, **kwargs):
+        r = super().send(*args, **kwargs)
+        self.res = r
+        self.url = r.url
+        self.status_code = r.status_code
+        self.form = None
+        return r
+
+    def find_forms(self, **filters):
+        if not self.res:
+            return []
+        tree = HTML(self.res.content)
+        filters_xpath = [f"[@{k}='{v}']" for k, v in filters.items()]
+        filters_xpath = "".join(filters_xpath)
+        return tree.xpath("//form" + filters_xpath)
+
+    def select_form(self, **filters):
+        forms = self.find_forms(**filters)
+        if len(forms) != 1:
+            if forms:
+                raise TooManyFormsError(self.res, filters)
+            else:
+                raise FormNotFoundError(self.res, filters)
+        self.form = WebClientForm(forms[0])
+
+    def update_form(self, **arguments):
+        if not self.form:
+            raise NoFormSelectedError('update_form')
+
+    def submit_form(self):
+        if not self.form:
+            raise NoFormSelectedError('submit_form')
+        if self.form.method not in ["POST"]:
+            raise NotImplementedError(
+                f"Submit method '{self.form.method}' not supported.")
+        self.request(
+            self.form.method,
+            urljoin(self.url, self.form.action),
+            data=self.form.data
+        )