Vault
Overview
The Vault 1.19.x upgrade guide contains information on deprecations, important or breaking changes, and remediation recommendations for anyone upgrading from Vault 1.18. Please read carefully.
Important changes
Transit support for Ed25519ph and Ed25519ctx signatures
NOTE: This only applies to Transit Ed25519 keys.
On prior versions of Vault, when the sign and verify API endpoints backed by an Ed25519 key received the prehashed=true or the hash_algorithm=sha2-512 parameters they were ignored, returning back or verifying a Pure Ed25519 signature. As of 1.19.x, setting these values on Enterprise editions of Vault will now return an Ed25519ph signature and assume the input has been hashed using the SHA-512 algorithm.
If neither prehashed nor hash_algorithm values are provided, the existing default of using Pure Ed25519 signatures remains unchanged for both Enterprise and CE Vault editions. The change is if those values had been overridden they were previously ignored but now will be enforced based on the table below.
| Vault Edition | prehashed | hash_algorithm | 1.19.x Signature | Previous Vault Versions Signature |
|---|---|---|---|---|
| Enterprise | not set | not set | Pure Ed25519 | Pure Ed25519 |
| Enterprise | false | any value other than sha2-512 | Pure Ed25519 | Pure Ed25519 |
| Enterprise | false | sha2-512 | An error is returned | Pure Ed25519 |
| Enterprise | true | any value other than sha2-512 | An error is returned | Pure Ed25519 |
| Enterprise | true | sha2-512 | Ed25519ph | Pure Ed25519 |
| CE | not set | not set | Pure Ed25519 | Pure Ed25519 |
| CE | false | any value other than sha2-512 | Pure Ed25519 | Pure Ed25519 |
| CE | false | sha2-512 | An error is returned | Pure Ed25519 |
| CE | true | any value other than sha2-512 | An error is returned | Pure Ed25519 |
| CE | true | sha2-512 | An error is returned (not supported on CE) | Pure Ed25519 |