🐛(back) allow / and = characters in user sub field #1295
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We want to keep a restrict list of allowed characters in the user sub field. We allow now the = and / Fix #1280
qbey
reviewed
Aug 26, 2025
| ), | ||
| ) | ||
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| sub = models.CharField( | ||
| _("sub"), | ||
| help_text=_( | ||
| "Required. 255 characters or fewer. Letters, numbers, and @/./+/-/_/: characters only." | ||
| "Required. 255 characters or fewer. Letters, numbers, and @.+-_:=/ characters only." |
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Actually the OIDC spec says the sub can contain up to 255 ASCII characters (following RFC 20 https://www.rfc-editor.org/rfc/rfc20.txt)
Subject Identifier. A locally unique and never reassigned identifier within the Issuer for the End-User, which is intended to be consumed by the Client, e.g., 24400320 or AItOawmwtWwcT0k51BayewNvutrJUqsvl6qs7A4. It MUST NOT exceed 255 ASCII [RFC20] characters in length. The sub value is a case-sensitive string.
Should we be less restrictive?
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Purpose
We want to keep a restricted list of allowed characters in the user sub field. We allow now the = and /
Proposal
Fix #1280