graeme thornton a0e55b062e Improvements to RSA key generation and pak signing ...

- 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: graeme.thornton
#ROBOMERGE-AUTHOR: graeme.thornton
#ROBOMERGE-SOURCE: CL 5381335 in //UE4/Release-4.22/...
#ROBOMERGE-BOT: RELEASE (Release-4.22 -> Main)

[CL 5383057 by graeme thornton in Main branch]

2019-03-13 11:12:27 -04:00

..

Private

Improvements to RSA key generation and pak signing

2019-03-13 11:12:27 -04:00

Public

Merging //UE4/Dev-Main @ 4664414 to Dev-Core (//UE4/Dev-Core)

2019-01-02 00:55:51 -05:00

PakFileUtilities.Build.cs

Merging //UE4/Dev-Main @ 4664414 to Dev-Core (//UE4/Dev-Core)

2019-01-02 00:55:51 -05:00