app-MAIL-temp/app/api/views/new_custom_alias.py

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from flask import g
from flask import jsonify, request
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from itsdangerous import SignatureExpired
from app.alias_utils import check_alias_prefix
from app.api.base import api_bp, require_api_auth
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from app.api.serializer import (
serialize_alias_info_v2,
get_alias_info_v2,
)
from app.config import MAX_NB_EMAIL_FREE_PLAN, ALIAS_LIMIT
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from app.dashboard.views.custom_alias import verify_prefix_suffix, signer
from app.db import Session
from app.extensions import limiter
from app.log import LOG
from app.models import (
Alias,
AliasUsedOn,
User,
DeletedAlias,
DomainDeletedAlias,
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Mailbox,
AliasMailbox,
)
from app.utils import convert_to_id
@api_bp.route("/v2/alias/custom/new", methods=["POST"])
@limiter.limit(ALIAS_LIMIT)
@require_api_auth
def new_custom_alias_v2():
"""
Create a new custom alias
Same as v1 but signed_suffix is actually the suffix with signature, e.g.
.random_word@SL.co.Xq19rQ.s99uWQ7jD1s5JZDZqczYI5TbNNU
Input:
alias_prefix, for ex "www_groupon_com"
signed_suffix, either .random_letters@simplelogin.co or @my-domain.com
optional "hostname" in args
optional "note"
Output:
201 if success
409 if the alias already exists
"""
user: User = g.user
if not user.can_create_new_alias():
LOG.d("user %s cannot create any custom alias", user)
return (
jsonify(
error="You have reached the limitation of a free account with the maximum of "
f"{MAX_NB_EMAIL_FREE_PLAN} aliases, please upgrade your plan to create more aliases"
),
400,
)
hostname = request.args.get("hostname")
data = request.get_json()
if not data:
return jsonify(error="request body cannot be empty"), 400
alias_prefix = data.get("alias_prefix", "").strip().lower().replace(" ", "")
signed_suffix = data.get("signed_suffix", "").strip()
note = data.get("note")
alias_prefix = convert_to_id(alias_prefix)
# hypothesis: user will click on the button in the 600 secs
try:
alias_suffix = signer.unsign(signed_suffix, max_age=600).decode()
except SignatureExpired:
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LOG.w("Alias creation time expired for %s", user)
return jsonify(error="Alias creation time is expired, please retry"), 412
except Exception:
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LOG.w("Alias suffix is tampered, user %s", user)
return jsonify(error="Tampered suffix"), 400
if not verify_prefix_suffix(user, alias_prefix, alias_suffix):
return jsonify(error="wrong alias prefix or suffix"), 400
full_alias = alias_prefix + alias_suffix
if (
Alias.get_by(email=full_alias)
or DeletedAlias.get_by(email=full_alias)
or DomainDeletedAlias.get_by(email=full_alias)
):
LOG.d("full alias already used %s", full_alias)
return jsonify(error=f"alias {full_alias} already exists"), 409
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if ".." in full_alias:
return (
jsonify(error="2 consecutive dot signs aren't allowed in an email address"),
400,
)
alias = Alias.create(
user_id=user.id,
email=full_alias,
mailbox_id=user.default_mailbox_id,
note=note,
)
Session.commit()
if hostname:
AliasUsedOn.create(alias_id=alias.id, hostname=hostname, user_id=alias.user_id)
Session.commit()
return (
jsonify(alias=full_alias, **serialize_alias_info_v2(get_alias_info_v2(alias))),
201,
)
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@api_bp.route("/v3/alias/custom/new", methods=["POST"])
@limiter.limit(ALIAS_LIMIT)
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@require_api_auth
def new_custom_alias_v3():
"""
Create a new custom alias
Same as v2 but accept a list of mailboxes as input
Input:
alias_prefix, for ex "www_groupon_com"
signed_suffix, either .random_letters@simplelogin.co or @my-domain.com
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mailbox_ids: list of int
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optional "hostname" in args
optional "note"
optional "name"
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Output:
201 if success
409 if the alias already exists
"""
user: User = g.user
if not user.can_create_new_alias():
LOG.d("user %s cannot create any custom alias", user)
return (
jsonify(
error="You have reached the limitation of a free account with the maximum of "
f"{MAX_NB_EMAIL_FREE_PLAN} aliases, please upgrade your plan to create more aliases"
),
400,
)
hostname = request.args.get("hostname")
data = request.get_json()
if not data:
return jsonify(error="request body cannot be empty"), 400
if type(data) is not dict:
return jsonify(error="request body does not follow the required format"), 400
alias_prefix = data.get("alias_prefix", "").strip().lower().replace(" ", "")
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signed_suffix = data.get("signed_suffix", "") or ""
signed_suffix = signed_suffix.strip()
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mailbox_ids = data.get("mailbox_ids")
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note = data.get("note")
name = data.get("name")
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if name:
name = name.replace("\n", "")
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alias_prefix = convert_to_id(alias_prefix)
if not check_alias_prefix(alias_prefix):
return jsonify(error="alias prefix invalid format or too long"), 400
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# check if mailbox is not tempered with
if type(mailbox_ids) is not list:
return jsonify(error="mailbox_ids must be an array of id"), 400
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mailboxes = []
for mailbox_id in mailbox_ids:
mailbox = Mailbox.get(mailbox_id)
if not mailbox or mailbox.user_id != user.id or not mailbox.verified:
return jsonify(error="Errors with Mailbox"), 400
mailboxes.append(mailbox)
if not mailboxes:
return jsonify(error="At least one mailbox must be selected"), 400
# hypothesis: user will click on the button in the 600 secs
try:
alias_suffix = signer.unsign(signed_suffix, max_age=600).decode()
except SignatureExpired:
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LOG.w("Alias creation time expired for %s", user)
return jsonify(error="Alias creation time is expired, please retry"), 412
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except Exception:
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LOG.w("Alias suffix is tampered, user %s", user)
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return jsonify(error="Tampered suffix"), 400
if not verify_prefix_suffix(user, alias_prefix, alias_suffix):
return jsonify(error="wrong alias prefix or suffix"), 400
full_alias = alias_prefix + alias_suffix
if (
Alias.get_by(email=full_alias)
or DeletedAlias.get_by(email=full_alias)
or DomainDeletedAlias.get_by(email=full_alias)
):
LOG.d("full alias already used %s", full_alias)
return jsonify(error=f"alias {full_alias} already exists"), 409
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if ".." in full_alias:
return (
jsonify(error="2 consecutive dot signs aren't allowed in an email address"),
400,
)
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alias = Alias.create(
user_id=user.id,
email=full_alias,
note=note,
name=name or None,
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mailbox_id=mailboxes[0].id,
)
Session.flush()
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for i in range(1, len(mailboxes)):
AliasMailbox.create(
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alias_id=alias.id,
mailbox_id=mailboxes[i].id,
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)
Session.commit()
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if hostname:
AliasUsedOn.create(alias_id=alias.id, hostname=hostname, user_id=alias.user_id)
Session.commit()
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return (
jsonify(alias=full_alias, **serialize_alias_info_v2(get_alias_info_v2(alias))),
201,
)