- CryptoKeys plugin can now be told how many bits to use for keys. Defaults to 2048 as a happy medium between security and performance
- After creating the OpenSSL RSA key, use the exp/mod values directly rather than recomputing from primes
- Added RSA.h with some TBigInt based helpers for RSA keys
- Added FPakSignatureFile to wrap the contents of the pak .sig file, including determining that it is of a new format that supports versioning. Wraps the encryption and decryption of he master table hash
- Changed pak master signature hash from crc to SHA1
- Modified access to executable embedded public key data so that it is just an array of bytes. Will allow custom key sizes in the future.
#rb joe.barrett, stefan.boberg
#jira UE-71280, UE-71377
#ROBOMERGE-OWNER: ryan.gerleve
#ROBOMERGE-AUTHOR: graeme.thornton
#ROBOMERGE-SOURCE: CL 5381335 in //UE4/Release-4.22/... via CL 5383057
#ROBOMERGE-BOT: ENGINE (Main -> Dev-Networking)
[CL 5415560 by graeme thornton in Dev-Networking branch]
