Email Name Constraints

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
45/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Quiet
Tech stack
rust
Domain
cryptography, security

Research direction

Start with RFC 2821 section 4.1.2 for Mailbox parsing and RFC 5280 section 4.2.1.10 for email name constraints, then compare the existing name-constraints handling in webpki. Review the email_address crate as a reference while deciding whether a dependency is appropriate. Done means email SAN constraints are implemented according to the X.509 specification and validated by relevant tests.

Written by the indexing model from the issue text.

Description

Hello I saw that currently name constraints aren't implemented to handle email sans. Was wondering if there'd be any problems if I were to make a PR for this? It seems the main work is just to specify what a valid email is and whether it follows said naming constraints.

For defining a valid email, implementing parsing for "Mailbox": https://datatracker.ietf.org/doc/html/rfc2821#section-4.1.2

Then the name constraints portion referring to emails: https://datatracker.ietf.org/doc/html/rfc5280#section-4.2.1.10

It seems like there's at least one other library implementing email parsing: https://docs.rs/email_address/latest/email_address/index.html, but it seems to encapsulate more than what the x509 RFC specifies, so I imagine it'd be better to just write it from scratch here. Also wasn't sure if there were any rules about introducing dependencies.

Dominant language
Rust
Stars
167
Forks
112
Avg merge
4h 28m
Merged PRs (30d)
4

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