tree dd835bf2d0bd6e8000b989d1f32608098342187c
parent d596f84d14c9e8ef47b4950096508699179de0e5
author Joshua Liebow-Feeser <joshlf@google.com> 1549591647 -0800
committer Joshua Liebow-Feeser <joshlf@google.com> 1549592693 -0800

[rsa] Add PSS signing

- Add RsaSignatureScheme trait, and an RsaPss implementation
- Add RsaSignature, parametric on bit size (RsaKeyBits), signature
  scheme (RsaSignatureScheme), and hash (Hasher)
- Modify existing tests to exercise signing and verification
- Add tests specific to signing and verification

Closes #4

Change-Id: I15db6ba0ddab0f49037ef72e9214ac0026fc42e7