Similar to the previous commit, openpgp applet implementations differ in
regards to the public exponent length. As of this writing:
- The SmartPGP applet requires an 11 bit public exponent size
- The Gnuk token requires a 32 bit public exponent size
For this reason, we simply set the public exponent size to the one
previously set in the key attribute info. With this commit, the only
variable that can actually change for an RSA key is its modulus size.