Ebenstead / NetSuite Intelligence / Platform archive
The HMAC-SHA1 authentication transition
A signature-method change to check when restoring an older integration.
Oracle product history
The documented milestones
These dates show when Oracle’s product changes took effect or became available. Our article dates are listed below.
- NetSuite release 2023.1Support ended
Oracle ended support for the HMAC-SHA1 signature method in 2023.1. Its supported-algorithm guidance specifies HMAC-SHA256.
Where this can still matter
Custom integrations and older connector code that constructed token-based authentication signatures.
When reviving an old connector or reviewing dormant code, check the signing algorithm rather than assume previously working code is still compatible.
A useful review today
- Identify the signature method without collecting token secrets.
- Reproduce the actual connection failure in an authorized test environment.
- Decide whether the integration needs a small fix, a vendor update or a wider change to how it signs in.
Related current guidance
Evidence and editorial dates
TBA error messages and supported signature algorithm ↗Original Oracle page publication/update date not stated. · Checked 2026-10-17
- Archive brief published
- Evidence checked
- Evidence basis
- Based on Oracle documentation. The linked pages may have been updated since these changes took place.
A defined next step
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