Add config.rejectCurves and prevent generating keys using blacklisted algos
#1395
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…public key algo and curves
Co-authored-by: Daniel Huigens <d.huigens@protonmail.com>
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Breaking change: when generating new subkeys through `key.addSubkey()`, we now check `config.rejectCurves` and prevent adding subkeys using the corresponding curves. By default, `config.rejectCurves` includes the brainpool curves (`brainpoolP256r1`, `brainpoolP384r1`, `brainpoolP512r1`) and the Bitcoin curve (`secp256k1`). This is a follow up to #1395 , which introduced the same check to `openpgp.generateKey`.
This was referenced Jun 23, 2022
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Breaking changes:
config.rejectPublicKeyAlgorithms;config.rejectCurvesto blacklist a set of ECC curves, to prevent keys using those curves from being generated, or being used to encrypt/decrypt/sign/verify messages.By default,
config.rejectCurvesincludes the brainpool curves (brainpoolP256r1,brainpoolP384r1,brainpoolP512r1) and the Bitcoin curve (secp256k1). This is because it's unclear whether these curves will be standardised, and we prefer to blacklist them already, rather than introduce a breaking change after release.