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51 lines
1.6 KiB
51 lines
1.6 KiB
from functools import wraps
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import secrets
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from django.core.signing import TimestampSigner, SignatureExpired
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from django.shortcuts import redirect, render
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from hc.api.models import TokenBucket
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from hc.lib import emails
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def _session_unsign(request, key, max_age):
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if key not in request.session:
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return None
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try:
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return TimestampSigner().unsign(request.session[key], max_age=max_age)
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except SignatureExpired:
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pass
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def require_sudo_mode(f):
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@wraps(f)
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def wrapper(request, *args, **kwds):
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assert request.user.is_authenticated
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# is sudo mode active and has not expired yet?
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if _session_unsign(request, "sudo", 1800) == "active":
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return f(request, *args, **kwds)
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if not TokenBucket.authorize_sudo_code(request.user):
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return render(request, "try_later.html")
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# has the user submitted a code to enter sudo mode?
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if "sudo_code" in request.POST:
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ours = _session_unsign(request, "sudo_code", 900)
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if ours and ours == request.POST["sudo_code"]:
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request.session.pop("sudo_code")
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request.session["sudo"] = TimestampSigner().sign("active")
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return redirect(request.path)
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if not _session_unsign(request, "sudo_code", 900):
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code = "%06d" % secrets.randbelow(1000000)
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request.session["sudo_code"] = TimestampSigner().sign(code)
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emails.sudo_code(request.user.email, {"sudo_code": code})
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ctx = {}
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if "sudo_code" in request.POST:
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ctx["wrong_code"] = True
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return render(request, "accounts/sudo.html", ctx)
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return wrapper
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