utility library for parsing asn1 files for use with browserify-sign.
When decrypting an encrypted PKCS#8 (ENCRYPTED PRIVATE KEY) key,
the PBKDF2 iteration count is read from the key's own (unauthenticated) parameters.
To avoid an attacker-supplied key forcing unbounded key-derivation work,
the iteration count is capped at 10,000,000;
a key outside the range 1 … 10000000 is rejected with a RangeError.
If you must parse untrusted encrypted PKCS#8 material,
still bound its size before passing it in.