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.
However, don't throw "unhandled promise rejection" when not using these
properties at all, or when they reject before the user has a chance to
handle them.
- Don't add an extraneous newline at the end of base64-encoded data
if it is a multiple of 60 characters long.
- Generate \r\n instead of \n in base64-encoded data.
- Generate one newline instead of two after END PGP PUBLIC KEY BLOCK
for consistency with the other footers.
This enables parallelism for streaming AEAD chunked encryption.
The reason we can't do so at the very end of the pipe chain
(e.g., in `readToEnd`) is because requests for increased
buffering (i.e. `desiredSize > 1`) do not propagate backwards,
only requests for backpressure (i.e. `desiredSize <= 0`) do.
When encrypting/signing a stream, this allows you to indicate whether it's a
stream of Strings or Uint8Arrays (using message.fromText or message.fromBinary,
respectively.)
When signing text, this allows you to control whether to create a cleartext
message or a regular armored text message.
When creating a detached signature, it allows you to control whether it's "meant
for" (verifying against) a cleartext message. A cleartext message has trailing
whitespace trimmed before signing. This fixes the case of passing a detached
signature from sign() to encrypt(). Since encrypt() doesn't create a cleartext
message, the signature would be invalid if the text contained lines with
trailing whitespace.
- The caller might not await them, in which case you get an "unhandled rejection"
- The caller might await them but only after reading the data, in which case you
get an unhandled rejection if there's an error before the end of the data
