[v6] Refuse to use keys without key flags, add config.allowMissingKeyFlags
#1677
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larabr
commented
Sep 11, 2023
twiss
reviewed
Sep 11, 2023
twiss
approved these changes
Oct 17, 2023
src/key/helper.js
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| case enums.publicKey.ed25519: { | ||
| if (!signature.keyFlags && !config.allowMissingKeyFlags) { | ||
| throw new Error('None of the key flags is set: consider passing `config.allowMissingKeyFlags`'); | ||
| } | ||
|
|
||
| return !signature.keyFlags || | ||
| (signature.keyFlags[0] & enums.keyFlags.signData) !== 0; | ||
| } |
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Sorry for missing these last time (and being very nitpicky ^.^), but these brackets are also not necessary. They're only necessary if you need a block scope, e.g. if you're creating block-scoped variables.
Suggested change
| case enums.publicKey.ed25519: { | |
| if (!signature.keyFlags && !config.allowMissingKeyFlags) { | |
| throw new Error('None of the key flags is set: consider passing `config.allowMissingKeyFlags`'); | |
| } | |
| return !signature.keyFlags || | |
| (signature.keyFlags[0] & enums.keyFlags.signData) !== 0; | |
| } | |
| case enums.publicKey.ed25519: | |
| if (!signature.keyFlags && !config.allowMissingKeyFlags) { | |
| throw new Error('None of the key flags is set: consider passing `config.allowMissingKeyFlags`'); | |
| } | |
| return !signature.keyFlags || | |
| (signature.keyFlags[0] & enums.keyFlags.signData) !== 0; |
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I know they are not needed, but it's not a big deal to add them IMO -- I just find it confusing to have a lot of code without brackets.
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Er, OK, but I think it's more important to have a consistent code style. JS cases normally don't have brackets, and most other code in the library doesn't have them, so we should only add them when needed.
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Ok, but then I'll add a linting rule for this, so that it's automatically enforced
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Key flags are needed to restrict key usage to specific purposes: https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-10.html#section-5.2.3.29 . Some older keys (e.g. from OpenPGP.js v1) do not declare any key flags. In previous OpenPGP.js versions, we've allowed such keys to be used for any operation for which they were compatible. This behaviour has now changed, and these keys are not allowed to be used for any operation. The setting `config.allowMissingKeyFlags` has been added to selectively revert to the past behaviour.
Also fix some indent issues with armoring code detected after required ESLint update. s
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Key flags are needed to restrict key usage to specific purposes: https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-10.html#section-5.2.3.29 . Some older keys (e.g. from OpenPGP.js v0) do not declare any key flags. In previous OpenPGP.js versions, we've allowed such keys to be used for any operation for which they were compatible. This behaviour has now changed, and these keys are not allowed to be used for any operation.
The setting
config.allowMissingKeyFlagshas been added to selectively revert to the past behaviour.