[ Partial merge of http://go/wvgerrit/188279 ]
This CL adds unit tests to verify that the following
forbidden uses of an RSA private key do not work:
- ForbidPrepAndSign -- A cast cert key cannot sign a license
request.
- ForbidUseAsDRMCert -- A cast cert cannot be used with the
DRM cert's padding scheme and it cannot be used to derive
keys from a session key.
- *ForbidRSASignatureForDRMKey* -- A DRM cert key cannot be
used with GenerateRSASignature.
- *OEMCertForbidGenerateRSASignature* -- An OEM cert key
cannot be used with GenerateRSASignature.
Bug: 251875110
Test: WVTS
Change-Id: I55b1eb04465023352edea55ba4ef532d1cd07231
a798692e4e