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Lead with a complete plugin quick start and add task-oriented usage, troubleshooting, customization, and contribution guides. Preserve the broader plugin framing, correct conflicting contract guidance, support Agents folder reviews, and align repository validation. Convert existing sample references to clickable links without changing knowledge rules. Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com> Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
26 lines
2.1 KiB
Markdown
26 lines
2.1 KiB
Markdown
---
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bc-version: [all]
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domain: security
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keywords: [isolatedstorage, secrets, api-key, oauth-token, connection-string, table-field, credentials]
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technologies: [al]
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countries: [w1]
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application-area: [all]
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---
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# A secret belongs in IsolatedStorage, never in a table field
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## Description
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API keys, OAuth tokens, client secrets, and connection strings must not be stored in an ordinary table `Text` field — not even on a hidden setup table. A regular field is exposed through record reads, page display, RapidStart and Excel export, report datasets, and surfaces in `DataClassification` review; anyone with table permission can read it. The correct home is `IsolatedStorage`, which is invisible to database queries, API pages, and configuration packages. The storage-*location* decision is the rule here; how to scope and encrypt the value once it is in IsolatedStorage is covered separately.
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## Best Practice
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Persist every credential in `IsolatedStorage`, write it at the point of capture, and read it only when needed. Prefer `SetEncrypted` when the value fits its documented length limit. On BC24 and later, carry the value through the `SecretText` overloads; on earlier releases, keep any required `Text` handling inside a `[NonDebuggable]` boundary. Choose the `DataScope` that matches the credential's lifetime. See `isolatedstorage-datascope-module-vs-company`, `isolatedstorage-setencrypted-for-sensitive-values`, and `secrettext-for-credentials` for those separate concerns.
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See sample: [`secrets-isolated-storage.good.al`](secrets-isolated-storage.good.al).
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## Anti Pattern
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A "Setup" or "Connection" table carrying a `Text` field named `API Key`, `Password`, or `Client Secret`. The value is now readable by any object with table permission, ships in RapidStart packages and Excel exports, and appears in record snapshots — a credential disclosure that no amount of encryption-in-transit elsewhere makes up for. Reviewer signal: a secret-shaped field declared on a table instead of an `IsolatedStorage` call.
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See sample: [`secrets-isolated-storage.bad.al`](secrets-isolated-storage.bad.al).
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