Refactor functions to take the configuration as a parameter.
This allows setting a config option for a single function call, whereas
setting `openpgp.config` could lead to concurrency-related issues when
multiple async function calls are made at the same time.
`openpgp.config` is used as default for unset config values in top-level
functions.
`openpgp.config` is used as default config object in low-level functions
(i.e., when calling a low-level function, it may be required to pass
`{ ...openpgp.config, modifiedConfig: modifiedValue }`).
Also,
- remove `config.rsaBlinding`: blinding is now always applied to RSA decryption
- remove `config.debug`: debugging mode can be enabled by setting
`process.env.NODE_ENV = 'development'`
- remove `config.useNative`: native crypto is always used when available
Also, when generating RSA keys in JS, generate them with p < q, as per
the spec.
Also, when generating RSA keys using Web Crypto or Node crypto, swap the
generated p and q around, so that will satisfy p < q in most browsers
(but not old Microsoft Edge, 50% of the time) and so that we can use the
generated u coefficient (p^-1 mod q in OpenPGP, q^-1 mod p in RFC3447).
Then, when signing and verifying, swap p and q again, so that the key
hopefully satisfies Safari's requirement that p > q, and so that we can
keep using u again.
There are dozens of links in the OpenPGP.js codebase that are http but
could be replaced with https links. I've converted as many of them as
i could find.
* Various FIXME tags are removed
* In curve.js:
- webCrypto/nodeCrypto fallback bug is fixed
- Curve25519 has keyType ecdsa (won't be used for signing, but technically can be)
- webGenKeyPair is simplifed
* In base64.js:
- documentation added and arguments simplified
* In ecdsa.js and eddsa.js:
- hash_algo is now at least as strong as the default curve hash
- simplified the code by moving webSign/nodeSign and webVerify/nodeVerify to live in key.js (ht @ismaelbej)
* In message.js:
- in decryptSessionKey, loops break once a key packet is decrypted
* In key.js:
- getPreferredHashAlgorithm returns the best hash algorithm
- enums are used for curve selection
